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UNIVERSITY OF AGRICULTURALSCIENCES,BANGALORE
Presentation on
“Fermentative metabolism and development of bioprocessing
technology, processing and production of recombinant products”
DEPARTMENTOF PLANTBIOTECHNOLOGY
PBT-603- Advances in Microbial Biotechnology
ANANYA
1ST PhD
PAMB0077
Need of Bioprocessing?
https://www.dailypioneer.com/2016/columnists/green-revolution-that-has-resulted-in-
chaos.html
http://catechize20.blogspot.com/2013/10/blog-post.html
GMOs came in picture!
• More nutritious food
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• Disease- and drought-
resistant plants that
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environmental resources
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fertilizer)
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with reduced cost and
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• Faster growing plants and
animals.
250kg 200gm (protein)
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In 24 hours
https://byjus.com/biology/single-cell-protein/
FERMENTATIVE METABOLISM
Traditional fermentation
Traditional fermentation technology, as mentioned in the literary
texts, is more than 3000 year old in India . The fermentation
technology employed a variety of processes and was put to a
large number of uses. It also laid the foundation of chemistry.
http://otfood.koreasme.com/fermented_soybean_lump.html
• Term fermentation is derived from the Latin word Fermentum that
stands for boiling and is the process of digesting certain substances
that leads to chemical conversion of organic substances into
simpler compounds
• Fermentation technology began with sweet substances (vegetable or
animal) in different parts of the world
• The process of fermentation was probably discovered by observing
the changes in the juices of several fruits and other substances that
had been kept for a day or more.
• The Rigveda (c.1500 BC) shows that
fermentation technology took its first step in
connection with the preparation of Soma juice in
India . There is also another drink, known as
Sura (wine/beer), prepared by fermentation
• These two preparations have also been used in
different medicinal preparations, surgical
procedures and in many chemical operations. It
is believed that acetic fermentation was known
to India since the early times
• Curd is another very popular fermentation product described in the
Rigveda . It still remains a popular food
• The technology of curdling milk is also found in a number of texts
associated with Yajurveda . In the beginning, fermentation was
mainly associated with the preparation of spiritual drinks, but later
on it was used for other purposes also.
Fermentation
• Features of fermentation pathways
• Pyruvic acid is reduced to form reduced organic acids or
alcohols.
• The final electron acceptor is a reduced derivative of
pyruvic acid
• NADH is oxidized to form NAD: Essential for
continued operation of the glycolytic pathways.
• O2 is not required.
Fermentation Pathways
• Glycolysis is the first stage of fermentation
• Forms 2 pyruvate, 2 NADH, and 2ATP
• Pyruvate is converted to other molecules, but is not fully
broken down to CO2 and water
• Regenerates NAD+ but doesn’t produceATP
• Provides enough energy for some single-celled anaerobic
species
• ALCOHOLIC FERMENTATION
• Pyruvate is split into acetaldehyde,CO2
• Acetaldehyde receives electrons
and hydrogenfrom NADH,
forming NAD+ and ethanol
• LACTATE FERMENTATION
• Pyruvate receives electrons and
hydrogen from NADH, forming NAD+
and lactate
Two Pathways ofFermentation
Fermentation Pathway as awhole
Why does fermentation requireextra
steps after glycolysis?
• In fermentation, after
glycolysis, there are additional
steps to oxidize NADH (into
NAD+)
• Electrons and hydrogen ions
from the NADH that was
produced by glycolysis are
donated to another organic
molecule
• No more ATPis created through
these additional steps
• So, fermentation = glycolysis +
recycling of NAD+
https://hmhub.me/classification-of-alcoholic-beverages/
• Fermentation products are wastes to cells that make them,
many are useful to humans(ethanol, acetic acid, and lactic acid).
Sprinters and LactateFermentation
Examples of fermentation
pathways
• Lactic acid fermentation
• Found in many bacteria;
e.g. Streptococcus sp, Lactobacillus
acidophilus
• Mixed acid fermentation
• e.g. Escherichia coli
• Basis of the methyl red test
• 2,3-Butanediol fermentation
• e.g. Enterobacter aerogenes
Fermentative metabolism and development of bioprocessing technology, processing and production of recombinant products
• Ethanol
(Saccharomyces cerevesiae)
• Propionic acid
(Propionibacterium)
• Acetone, buteraldehyde, and
butanol
(Clostridium acetobutylicum)
Other important fermentation end products
Two broad fermentation techniques have emerged
1)Solid State Fermentation(SSF)
2) Submerged Fermentation(SmF)
• Solid state (substrate) fermentation (SSF) has been defined as the
fermentation process occurring in the absence or near-absence of free
water
• Solid state fermentation (SSF) is
production of enzymes, which
another
involves
method used for the
the cultivation of
microorganisms on a solid substrate, such as grains, rice and wheat
bran
• SSF employs natural raw materials as carbon source such as
cassava, barley, wheat bran, sugarcane bagasse, various oil cakes
like palm kernel cake, soybean cake, ground nut oil cake, fruit pulps
(e.g. apple pomace), saw dust, seeds (e.g. tamarind, jack fruit),
coffee husk and coffee pulp, tea waste, spent brewing.
Solid State Fermentation
Fermentative metabolism and development of bioprocessing technology, processing and production of recombinant products
https://en.wikipedia.org/wiki/Solid-state_fermentation
Solid state fermentation process
Examples for Solid State Fermentation
Submerged fermentation
• The substrate used for fermentation is
always in liquid state which contains
the nutrients needed for growth
• The fermentor which contains the
substrate is operated continuously
and the product biomass is
continuously harvested from the
fermenter by using different
techniques then the product is
filtered or centrifuged and then
dried
• Submerged fermentation is a method of
manufacturing biomolecules in which
enzymes and other reactive compounds
are submerged in a liquid such as
alcohol, oil or a nutrient broth
Applications
• Submerged Fermentation (SmF)/Liquid Fermentation (LF) SmF
utilizes free flowing liquid substrates, such as molasses and broths
• The bioactive compounds are secreted into the fermentation
broth
• The substrates are utilized quite rapidly; hence need to be
constantly replaced/supplemented with nutrients.This fermentation
technique is best suited for microorganisms such as bacteria that
require high moisture.
• An additional advantage of this technique is that purification of
products is easier.
• SmF is primarily used in the extraction of secondary metabolites
that need to be used in liquid form
SOLID-STATE FERMENTATION SUBMERGEDFERMENTATION
Utilizes solid substrates like
bran, bagasse and paper pulp.
Utilizes free flowing liquid
substrates, such as molasses and
broths
Substrates are utilized very slowly, need
not to be replaced.
Substrates are utilized quite rapidly,
need to be replaced constantly
Best suited for fungi that require less
moisture content.
Best suited for bacteria that require high
moisture content.
Culture systems involves three phases,
solid, liquid and gaseous
Involves two phases ,liquid and
gaseous phase
Inoculum ration is always larger Inoculum ration is usually small.
System may or may not involve
agitation
Agitation is often essential
Production of Penicillin via Batch Fermentation
Production of Citric Acid via Continuous Fermentation
https://ib.bioninja.com.au/options/untitled/b1-microbiology-organisms/batch-versus-continuous.html
Bioprocessing Technology
Chronology Milestones
6000 BC Brewing (Sumeria, Babylonia)
2400 BC The first bioprocess complete description (ancient Egyptian)
1680 Yeast under the microscope (van Leeuwenhoek)
1835 Alcoholic fermentation associated with yeast
1857 Fermentation correlated with metabolism (Pasteur)
1877 Term “enzyme” (in yeast) introduced (Kühne)
1923 Industrial production of Citric acid
1930s Industrial production of Amino acids
1940s Industrial production of Antibiotics
1979 Monoclonal antibody production by hybridoma cell
1982 Industrial Production of rHuman Insulin in E. coli (Eli Lily)
1984 First commercial production of therapeutic MAb (Anti CD3)
1994 First commercial vaccine from recombinant yeast (Hepatitis B vaccine)
1996 Completion of the yeast genome project for S. cerevisiae.
2000 10 m3 STR for Mammalian cell culture
2002 Disposable bioreactors were used in industrial scale
2007 The Bioprocess products market exceeded 700 Billion US$. Only the
Biopharmaceuticals market reached 70 Billion US$. Mammalian cell culture
products reached 25 Billions US$
Milestones of Bioprocess Industry Development
Industrial Bioprocessing
Vaccine
Biopharmaceuticals
Solvents
Baker’s yeast
Organic acids
Amino acids
Antibiotics Enzymes
biopolymers
rProteins
MAb
SCP Biosurfactants
Probiotics
Plant Bioactive
compounds BioDiesel
Pre
1940s
Pre
1980s
Post
1980s
Some of Major Industrial Fermentation Products
Product Annual
production
Metric Tons
Main
Application
Microorganism
Citric acid 1,200,000 Food A. niger
Ethanol 26,000,000 Fuel S. cerevisiae
Glutamate 1,000,000 Flavoring C. glutamicum
Lactic acid 400,000 Food, plastics Lactobacillus sp.
Lysine 800,000 Feed C. glutamicum
Penicillin 60,000 Pharmaceutical P. chrysogenum
Xanthan Gum 100,000 Food, oil
drilling
X. campestris
Ref. Bioprocessing-from Biotechnology to Biorefinery (S.T. Yang, Ed.), Elsevier Press, 2007.
Stage Main product Vessels Process control Culture method Quality control Pilot Plant
facilities
Strain selection
Pre 1900 -Alcohol
-Vinegar
Wooden vessels
and
copper used
later
Use of
thermometer ,
hydrometer
Batch Virtually
Nil
Nil Pure yeast
and
bacterial
cultures
1900-1940 -Backer´s yeast
-Glycerol
-Citric acid
-Lactic acid
Vessels up to
200 m3
Mechanical
stirring in
small vessels
Temp control
pH control
Batch
Fed-batch
Virtually
Nil
Virtually
Nil
Pure cultures
1940-date -Antibiotics
-Amino acids
-Transformation
-Enzymes
Stirred
bioreac
tor
bioreac
tor)
tan
k
(tru
e
Sterilizable pH
and
DO electrodes
Batch
Fed-
batch
Continu
ous
Very important Becomes
common
Mutation
an
d
selection
programms
1964-date Single cell protein Pressure cycle
and
pressure jet
vessels
development
Use of
computer
linked control
loop
Continu
ous
with
recycli
ng
cultu
re
mediu
m
Very important Very important Genetic
Engineering
of producer
strain
attempted
Stages of Industrial Biotechnology from 1900 to date
1979-date Production of
heterologous
proteins by
microbial, animal
cells, monoclonal
antibodies
More
development
in bioreactor
design, Hollow
fiber
bioreactor,
Animal cell
bioreactor
More
developme
nt
in sensors and
Control system.
Immobiliezed
cells
Animal cell
process
Very important Very important Introduction of
foreign genes
into microbial
and animal
hosts
1985-date More heterologous
protein
production of
growth factors
More
development
in bioreactor
design And
agitation
systems. Animal
cell bioreactor
On line
Autoclava
ble
biosensor
s
contro
l,
High cell
cultivatio
n
densit
y
Very important Very important Utilization of
fungal
cells as host
for
heterologous
protein
production
1995-date Increase in
heterologous
protein
production using
different cell
factories
More
development
in
traditio
nal cultivation
vessels and new
vessels
New era in
online
control
sensor
s (replacable
during process),
biosensors
High cell
density,
perfusion
culture
Very important Very important More cell
factories
used such as
invertebrate
cells and insect
cells
A typical growth curve consists of following stages
a) Lag phase
b) Acceleration phase
c) Log or exponential phase
d) Deceleration phase
e) Stationary phase
f) Death phase
Growth Curve
(a) Lag phase:
Immediately after inoculation, there is no increase in
the numbers of the microbial cells for some time and
this period is called lag phase. In this is phase the
organisms adjust to the new environment in which it is
inoculated into.
(b) Acceleration phase:
The period when the cells just start increasing in
numbers is known as acceleration phase.
(c) Log phase:
This is the time period when the cell numbers
steadily increase.
(d) Deceleration phase:
The duration when the steady growth declines.
(e) Stationary phase:
The period where there is no change in the microbial
cell number is the stationary phase. This phase is
attained due to depletion of carbon source or
accumulation of the end products.
(f) Death phase:
The period in which the cell numbers decrease steadily
is the death phase. This is due to death of the cells
because of cessation of metabolic activity and
depletion of energy resources.
Depending upon the product required the different
phases of the cell growth are maintained. For microbial
mass the log phase is preferred. For production of
secondary metabolites i.e. antibiotics, the stationary
phase is preferred.
Growth kinetics of batch culture
The number of living cells (population of
growth rate dN/dt)varies with time in a batch
system as shown below:
where;
LAG PHASE:
Number of bacteria does not change with time in lag phase.
LOG PHASE:
Number of bacteria increases exponentially in log phase.
During log phase the number of
organisms in the reactor at any
time t can be calculated, by
using rate equation shown
below:
According to last equation, number of bacteria in the
reactor at any time t during log phase can be calculated,
as it is seen in the graph.
This rate equation can be integrated:
STATIONARYPHASE:
There is no net change in number of bacteria with time in
stationary phase. Bacteria divide but also die at equal rate.
Most of the important biological products (especially
secondary metabolites like antibiotics) or biomass are
produced during this phase.
The biomass concentration at stationary phase is
determined by following equation
X = Y. SR
X=cell concentration
Y= yield factor for limiting nutrient
SR = original nutrient concentration in themedium
Y’ measures the efficiency of a cellin
converting nutrients into biomass
So the biomass at a particular time in the
during the fermentation is given by the
following equation.
X = Y (SR -s)
S= nutrient concentration at particular time
thus ‘Y’ is represented by the
following equation
Y = X/ (SR - s)
Bioprocess Development
Industrial Bioprocessing: Microbial cells
Bioprocess development
Objectives of bioprocess
• Biomass production
• Enzyme production
• Metabolite production
• Recombinant protein production
• Metabolic biotransformation
Bioprocess Optimization in Lab. scale
(Development of cultivation strategy to reach the maximal
productivity)
Scaling up of the Process
Down Stream
(Separation/Isolation/Purification and increase of
product Stability)
Determination of process
bottleneck(s)
Stages in Bioprocess development
• Upstream process- refers to the first step in which biomolecules are
produced by biotic systems (micro-organism, cell-lines, or single cell
chlorophytes) in bioreactors
• Downstream process- refers to the recovery and purification of biosynthetic
products, recycling salvageable components and proper effluent treatment
and disposal.
Bioprocess development and technology, Dr. Varsha C Mohanan, St.Mary’s College
Scale-up of Bioprocess
The main problem area
•
•
Inoculum development Medium
sterilization Aeration- Agitation
Stages of scale up
•
•
•
Shake flasks
Laboratory stirred Fermenters
(Smallbioreactors) and Pilot scale
Fermenters (Industrial bioreactors)
From Petri-dish to Bioreactor
Gujarat Biotechnology Research Centre (GBRC), recently established as an
autonomous institute under Department of Science and Technology (DST), along
with Ahmedabad based firms Hester Biosciences (poultry vaccine manufacturer)
and OmniBRx have firmed up discussions with Bharat Biotech to scale up the
COVAXIN technology and to produce minimum 20 million doses per month.
Technology transfer agreement has been finalized.
https://www.biospectrumindia.com/news/73/18646/gujarat-supports-scale-up-of-covaxin-production.html
Image credit- shutterstock.com
Bioreactor Design
Since mid-1950s no major
Change in STR Engineering
Change mainly in:
- Sampling system
- Valves
- Material Finish
- Sensors
(on-line, in-line and off-
line)
- Control system
Bioreactor: The heart of Industrial
Bioprocessing Facility
Manufacturing Cost in Bioprocess
Industries
1. Product 1. New Product discovery from different cell
factories
2. Over-expression of certain metabolites
(Pathways Engineering)
3. Production of new recombinant products
4. MAb revolution will continue
2. Biofactory 1. Discovery of new biofactories
2. Progress research in the omics approach
for better pathways engineering
3. Expression system 1. Development of stronger expression
systems
2. Process debottle-necking by genetic new
approaches
4. Bioprocess 4.1 New economic media formulations
(especially for higher Eukaryotic cells)
4. New Bioprocess design
5. Improved sensors and control system
6. Improvement in Downstream separation
process (more solvent free processes)
Applications
Medium component Defined
Component
Un-defined
Component
Carbon source (Glucose,Fructose,Glycerol,xylose)
(Sucrose, Starch)
Molasses, Meat extract,
Peptone, Plant extracts and
Materials (Cellulosic,
lignoncellulosic and
hemicellulosic materials,Starch
complex, etc…)
Nitrogen source Ammonium and Nitrate Salts Yeast extract, Amino acid
complex, Casein
Phosphate Mono and di-phosphate salts In traces of complex C- andN-
sources
Sulphur Ammonium and Magnesium sulphate In traces of complex C- andN-
sources
Magnesium Mainly Magnesium sulphate In traces of complex C- andN-
sources
Mn, Mo, Fe, Zn, etc… In form of Inorganic salts In traces of complex C- andN-
sources
Vitamin and Growth
factors
Added in pure form of vitaminand
growth factors preparation
Yeast extract, and may found
also as traces in some C- and
N-sources
General Composition of Cultivation Media
Element % (w/w) of cell dry weight
Bacteria Yeast Filamentous fungi
Carbon 46-52 46-52 45-55
Nitrogen 10-14 6-9 4-7
Phosphorus 2-4 0.8-2.6 0.4-4.5
Sulphur 0.2-1.0 0.01-0.25 0.1-0.5
Magnesium 0.1-0.5 0.1-0.5 0.1-0.3
Sodium 0.5-1.0 0.01-0.1 0.02-0.5
Calcium 0.01-1.1 0.1-0.3 0.1-1.4
Iron 0.02-0.2 0.01-0.5 0.1-0.2
Manganese 0.001-0.01 0.0005-0.007 -
Molybdenum- - 0.0001-0.0005 -
Overviews on the elemental composition of the microorganisms
Products of Industrial biotechnology
Primary
metabolites
Secondary
metabolites
Organic acids and
Polymers
Alcohols
Vitamins and
Nutraceuticals
Antibiotics
Biopharmaceuticals
Enzymes
SCPs, Biofuels and
Bioenergy
Fine and specialty
chemicals
New materials
Amino acids
Microbial biomass
Microbial Enzymes
Recombinant
proteins
Biotransformation
Color Essential oils
Mint oil Mentha piperata
Chamomile oil Ma. Chamomilla
Jasmine oil Jasmine
officinale
Anissed oil Pim. anisum
Anthocyanins V. vinifera
Betalaines B. vulgaris
Crocetins Gardenia jasminoides
Anthraquinones Cinchon ledgeriana
Flavors Sweeteners
Stevioside Stevia rebaudiana
Glycyrrhizin Glycyrrhiza glabra
Thaumatin Thaumatococcus danielli
Vanillin Va. Planifolia
Garlic Allium sativum
Onion Allium cepa
Basmati Oryza sativa
Citrus Citrus spp.
Cocoa flavour Theobromo cacao
Pharmaceuticals
Hepato-protective Ligustrum robustum
Anti-oxidant Artemisia judaica
Anti-inflammatory Harpagophytum
procumbens
Anti-cancer Catharanthus roseus
Anti-bacterial Ficus microcarpa
Anti-fungal Backhousia
citriodora
Anti-ulcer Different plants
Recombinant products
Therapeutic proteins
hGM-CSF
HBsAg
Interleukin-12
Ginseng h-lactoferrin
vaccine
production MAb
Plant: Natural source of metabolites
New Process for Plant Metabolites
Production
• It is independent of geographical and seasonal variations
and various environmental factors
• It offers a defined production system, which ensure
continuous supply of products, uniform quality and yield
• It is possible to produce novel compounds that are not
normally found in parent plant
• Efficient downstream recovery with low cost and
minimum number of steps
• High efficient production rate with significant short
production time
PhotoBioreactor
-Plant cells
-Algal cells
Cells as an end product Cells-derived product
Artificial skin Growth factors
Artificial organ
-Hepatocyte (liver)
-Beta-islet cells (pancreas)
Hormones
-Human growth hormones
-Insulin
Bone Marrow Interferons
Lymphocytes Monoclonal antibodies
Mammalian Cells
Tissue Engineering Cell Culture
Different levels for mammalian cells /
insect cells cultivation
Scaling up
Different levels of cells cultivation
Small scale (T-flask, 24 well)
Spinner flask Rolling bottles
Bioreactor Level
(STR, Air-Lift, Hollow fiber)
Shear
Stress
Mixing
Cell
Productivity
Non-
Optimized
Semi-
Optimized
Fully-
Optimized
Processing and Production of
recombinant products
Recombinant DNATechnology
• Revolutionized biology
• Manipulation of DNA sequences and the
construction of chimeric molecules, provides a
means of studying how a specific segment of
DNAworks
• Studies in bacteria and bacterial viruses have
led to methods to manipulate and recombine
DNA
• Once properly identified, the recombinant
DNA molecules can be used in various ways
useful in medicine and human biology
OVERVIEW
Fermentative metabolism and development of bioprocessing technology, processing and production of recombinant products
Recombinant Pharmaceuticals
• A number of human disorders can betraced to
the absence or malfunction of a protein
normally synthesized in the body
• Most of these disorders can be treated by
supplying the patient with the correct
version of the protein
• Hence, modern pharmaceutical
manufacturing frequently relies upon
recombinant drugs
Recombinant Pharmaceuticals
• Human Insulin
• Human Growth Hormone
• Human blood clotting factors
• Vaccines
• MonoclonalAntibodies
• Interferons
• Antibiotics & other secondary metabolites
Human Insulin
• Earliest use of recombinant technology
• Modify E.coli cells to produce
insulin; performed by
Genentech in 1978
• Prior, bovine and porcine insulin
used but induced immunogenic
reactions
• Also, there were many
purification and contamination
issues
• Toovercome these problems,
researchers inserted human insulin
genes into a suitable vector (E.coli)
Fermentative metabolism and development of bioprocessing technology, processing and production of recombinant products
Human Growth Hormones
• Somatostatin and Somatotrophin are two proteins that
act in conjunction to control growth processes in the
human body, their malfunction leading to painful and
disabling disorders such as Acromegaly (uncontrolled
bone growth) and Dwarfism (Katznelson et al., 2014)
• Somatostatin was the first human protein to be
synthesized in E. coli. Being a very short protein, only
14 amino acids in length (Patel et al 1999), it was ideally
suited for artificial gene synthesis
• It’s production involves insertion of the artificial
gene into a lacZ′ vector, synthesis of a fusion protein,
and cleavage with cyanogen bromide
Recombinant Blood Clotting Factors
• Human factor VIII is a protein that plays a
central role in blood clotting.
• The commonest form of haemophilia in
humans results from an inability to synthesize
factor VIII
• The complete human cDNA has been
attached to the promoter for the whey acidic
protein gene of pig, leading to synthesis of
human factor VIII in pig mammary tissue
and subsequent secretion of the protein in
the milk.
• The factor VIII produced in this way
appears to be exactly the same as the
native protein
Recombinant Vaccines
• Two types:
(i)Recombinant protein vaccines: This is based
on production of recombinant DNA which is
expressed to release the specific protein used in
vaccine preparation (Soler et al., 2007)
(ii)DNA vaccines: Here the gene encoding for
immunogenic protein is isolated and used to
produce recombinant DNA which acts as
vaccine to be injected into the individual (Z
Cui et al 2005)
Fermentative metabolism and development of bioprocessing technology, processing and production of recombinant products
Recombinant protein vaccines:
• Pathogen produces its proteins in the body
which elicit an immune response from the
infected body
• The gene encoding such a protein is isolated
from the causative organism
• This DNA is expressed in another host
organism, like genetically engineered
microbes; animal cells; plant cells; insect
larvae etc, resulting in the release of
appropriate proteins
• These when injected into the body, causes
immunogenic response against the
corresponding disease providing immunity
DNAvaccines
• Recombinant vaccines in which the DNA is used
as a vaccine.
• The gene responsible for the immunogenic protein is
identified, isolated and cloned with corresponding
expression vector
• Upon introduction into the individuals to be
immunized, it produces a recombinant DNA
• This DNA when expressed triggers an immune
response and the person becomes successfully
vaccinated
• The mode of delivery of DNA vaccines include:
direct injection into muscle; use of vectors like
adenovirus, retrovirus etc; invitro transfer of the
gene into autologous cells and reimplantation of the
same and particle gun delivery of the DNA
Fermentative metabolism and development of bioprocessing technology, processing and production of recombinant products
RecombinantAntibodies
• An immunoglobulin which produced because of the
introduction of an antigen into the body, and which possesses
the ability to recognize the antigen.
• No animals are needed in the manufacturing procedure of
the recombinant antibodies, in addition, the manufacturing
time is relatively short compared with the conventional
method
• Also, he quality of the final product is higher
Production of RecombinantAntibodies
The production of non-animal recombinant
antibodies involves five steps:
(1) creation of an antibody gene library
(2) display of the library on phage coats or cell
surfaces
(3) isolation of antibodies against an antigen of
interest
(4) modification of the isolated antibodies and
(5) scaled up production of selected antibodies in
a cell culture expression system.
Recombinant Secondary Metabolites
• The importance of antibiotics to medicine has led to
much research into their discovery and production
• The importance of antibiotics to medicine has led to
much research into their discovery and production
• GM micro-organisms are used to increase
production
• Another technique used to increase yields is
gene amplification, where copies of genes coding
for enzymes involved in the antibiotic production
can be inserted back into a cell, via vectors such
as plasmids
• GM micro-organisms are used to increase production
• Another technique used to increase yields is gene
amplification, where copies of genes coding for enzymes
involved in the antibiotic production can be inserted back
into a cell, via vectors such as plasmids
• Plant secondary metabolites can also be produced by
rDNA technology in plant suspension cultures, micro-
organism cultures and hairy root cultures
• A. rhizogenes mediated transformation which can
transfer foreign genes into the transformed hairy root
• E.g.: 6-hydroxylase gene of Hyoscyamus muticus
which was introduced to Atropa belladonna using
A. rhizogenes
• Engineered roots showed an increased amount of enzyme
activity and a five-fold higher concentration of scopolamine
Fermentative metabolism and development of bioprocessing technology, processing and production of recombinant products
Challenges in Industrial bioprocessing
•Agricultural raw materials are expensive
•Lowcost materials like cellulose cannot be readily used
for microbialprocess
•Bioprocessis still not effective aschemical
processing
•Bioprocessingisanexpensiveaffair
•Make Agriculture more competitive and sustainable
•Improve quality of life of people while reducing impact by
development of innovative and affordable products (common
people can afford luxurious products)
•Helps increase industrial economy and environmental
efficiency and sustainability
Benefits
References
• https://www.biospectrumindia.com/news/73/18646/g
ujarat-supports-scale-up-of-covaxin-production.html
• https://www.slideshare.net/SMCTCR/biotechnologybio
process-development-and-technology
• https://www.slideshare.net/tanvipotluri/production-
of-recombinant-pharmaceuticals
• https://www.slideshare.net/yongkangbirdnest/lecture-
2-introduction-to-bioprocess
• https://www.slideshare.net/SripatiAbhiramSahoo/ferm
entative-metabolism
• https://www.slideshare.net/shashikala221977/ferment
ation-technology-77873936

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Fermentative metabolism and development of bioprocessing technology, processing and production of recombinant products

  • 1. UNIVERSITY OF AGRICULTURALSCIENCES,BANGALORE Presentation on “Fermentative metabolism and development of bioprocessing technology, processing and production of recombinant products” DEPARTMENTOF PLANTBIOTECHNOLOGY PBT-603- Advances in Microbial Biotechnology ANANYA 1ST PhD PAMB0077
  • 4. GMOs came in picture! • More nutritious food • Tastier food • Disease- and drought- resistant plants that require fewer environmental resources (such as water and fertilizer) • Less use of pesticides • Increased supply of food with reduced cost and longer shelf life • Faster growing plants and animals.
  • 5. 250kg 200gm (protein) 200g 25 tones (protein) In 24 hours https://byjus.com/biology/single-cell-protein/
  • 7. Traditional fermentation Traditional fermentation technology, as mentioned in the literary texts, is more than 3000 year old in India . The fermentation technology employed a variety of processes and was put to a large number of uses. It also laid the foundation of chemistry. http://otfood.koreasme.com/fermented_soybean_lump.html
  • 8. • Term fermentation is derived from the Latin word Fermentum that stands for boiling and is the process of digesting certain substances that leads to chemical conversion of organic substances into simpler compounds • Fermentation technology began with sweet substances (vegetable or animal) in different parts of the world • The process of fermentation was probably discovered by observing the changes in the juices of several fruits and other substances that had been kept for a day or more.
  • 9. • The Rigveda (c.1500 BC) shows that fermentation technology took its first step in connection with the preparation of Soma juice in India . There is also another drink, known as Sura (wine/beer), prepared by fermentation • These two preparations have also been used in different medicinal preparations, surgical procedures and in many chemical operations. It is believed that acetic fermentation was known to India since the early times
  • 10. • Curd is another very popular fermentation product described in the Rigveda . It still remains a popular food • The technology of curdling milk is also found in a number of texts associated with Yajurveda . In the beginning, fermentation was mainly associated with the preparation of spiritual drinks, but later on it was used for other purposes also.
  • 11. Fermentation • Features of fermentation pathways • Pyruvic acid is reduced to form reduced organic acids or alcohols. • The final electron acceptor is a reduced derivative of pyruvic acid • NADH is oxidized to form NAD: Essential for continued operation of the glycolytic pathways. • O2 is not required.
  • 12. Fermentation Pathways • Glycolysis is the first stage of fermentation • Forms 2 pyruvate, 2 NADH, and 2ATP • Pyruvate is converted to other molecules, but is not fully broken down to CO2 and water • Regenerates NAD+ but doesn’t produceATP • Provides enough energy for some single-celled anaerobic species
  • 13. • ALCOHOLIC FERMENTATION • Pyruvate is split into acetaldehyde,CO2 • Acetaldehyde receives electrons and hydrogenfrom NADH, forming NAD+ and ethanol • LACTATE FERMENTATION • Pyruvate receives electrons and hydrogen from NADH, forming NAD+ and lactate Two Pathways ofFermentation
  • 15. Why does fermentation requireextra steps after glycolysis? • In fermentation, after glycolysis, there are additional steps to oxidize NADH (into NAD+) • Electrons and hydrogen ions from the NADH that was produced by glycolysis are donated to another organic molecule • No more ATPis created through these additional steps • So, fermentation = glycolysis + recycling of NAD+
  • 17. • Fermentation products are wastes to cells that make them, many are useful to humans(ethanol, acetic acid, and lactic acid).
  • 19. Examples of fermentation pathways • Lactic acid fermentation • Found in many bacteria; e.g. Streptococcus sp, Lactobacillus acidophilus • Mixed acid fermentation • e.g. Escherichia coli • Basis of the methyl red test • 2,3-Butanediol fermentation • e.g. Enterobacter aerogenes
  • 21. • Ethanol (Saccharomyces cerevesiae) • Propionic acid (Propionibacterium) • Acetone, buteraldehyde, and butanol (Clostridium acetobutylicum) Other important fermentation end products
  • 22. Two broad fermentation techniques have emerged 1)Solid State Fermentation(SSF) 2) Submerged Fermentation(SmF)
  • 23. • Solid state (substrate) fermentation (SSF) has been defined as the fermentation process occurring in the absence or near-absence of free water • Solid state fermentation (SSF) is production of enzymes, which another involves method used for the the cultivation of microorganisms on a solid substrate, such as grains, rice and wheat bran • SSF employs natural raw materials as carbon source such as cassava, barley, wheat bran, sugarcane bagasse, various oil cakes like palm kernel cake, soybean cake, ground nut oil cake, fruit pulps (e.g. apple pomace), saw dust, seeds (e.g. tamarind, jack fruit), coffee husk and coffee pulp, tea waste, spent brewing. Solid State Fermentation
  • 26. Examples for Solid State Fermentation
  • 27. Submerged fermentation • The substrate used for fermentation is always in liquid state which contains the nutrients needed for growth • The fermentor which contains the substrate is operated continuously and the product biomass is continuously harvested from the fermenter by using different techniques then the product is filtered or centrifuged and then dried • Submerged fermentation is a method of manufacturing biomolecules in which enzymes and other reactive compounds are submerged in a liquid such as alcohol, oil or a nutrient broth
  • 28. Applications • Submerged Fermentation (SmF)/Liquid Fermentation (LF) SmF utilizes free flowing liquid substrates, such as molasses and broths • The bioactive compounds are secreted into the fermentation broth • The substrates are utilized quite rapidly; hence need to be constantly replaced/supplemented with nutrients.This fermentation technique is best suited for microorganisms such as bacteria that require high moisture. • An additional advantage of this technique is that purification of products is easier. • SmF is primarily used in the extraction of secondary metabolites that need to be used in liquid form
  • 29. SOLID-STATE FERMENTATION SUBMERGEDFERMENTATION Utilizes solid substrates like bran, bagasse and paper pulp. Utilizes free flowing liquid substrates, such as molasses and broths Substrates are utilized very slowly, need not to be replaced. Substrates are utilized quite rapidly, need to be replaced constantly Best suited for fungi that require less moisture content. Best suited for bacteria that require high moisture content. Culture systems involves three phases, solid, liquid and gaseous Involves two phases ,liquid and gaseous phase Inoculum ration is always larger Inoculum ration is usually small. System may or may not involve agitation Agitation is often essential
  • 30. Production of Penicillin via Batch Fermentation Production of Citric Acid via Continuous Fermentation https://ib.bioninja.com.au/options/untitled/b1-microbiology-organisms/batch-versus-continuous.html
  • 32. Chronology Milestones 6000 BC Brewing (Sumeria, Babylonia) 2400 BC The first bioprocess complete description (ancient Egyptian) 1680 Yeast under the microscope (van Leeuwenhoek) 1835 Alcoholic fermentation associated with yeast 1857 Fermentation correlated with metabolism (Pasteur) 1877 Term “enzyme” (in yeast) introduced (Kühne) 1923 Industrial production of Citric acid 1930s Industrial production of Amino acids 1940s Industrial production of Antibiotics 1979 Monoclonal antibody production by hybridoma cell 1982 Industrial Production of rHuman Insulin in E. coli (Eli Lily) 1984 First commercial production of therapeutic MAb (Anti CD3) 1994 First commercial vaccine from recombinant yeast (Hepatitis B vaccine) 1996 Completion of the yeast genome project for S. cerevisiae. 2000 10 m3 STR for Mammalian cell culture 2002 Disposable bioreactors were used in industrial scale 2007 The Bioprocess products market exceeded 700 Billion US$. Only the Biopharmaceuticals market reached 70 Billion US$. Mammalian cell culture products reached 25 Billions US$ Milestones of Bioprocess Industry Development
  • 33. Industrial Bioprocessing Vaccine Biopharmaceuticals Solvents Baker’s yeast Organic acids Amino acids Antibiotics Enzymes biopolymers rProteins MAb SCP Biosurfactants Probiotics Plant Bioactive compounds BioDiesel Pre 1940s Pre 1980s Post 1980s
  • 34. Some of Major Industrial Fermentation Products Product Annual production Metric Tons Main Application Microorganism Citric acid 1,200,000 Food A. niger Ethanol 26,000,000 Fuel S. cerevisiae Glutamate 1,000,000 Flavoring C. glutamicum Lactic acid 400,000 Food, plastics Lactobacillus sp. Lysine 800,000 Feed C. glutamicum Penicillin 60,000 Pharmaceutical P. chrysogenum Xanthan Gum 100,000 Food, oil drilling X. campestris Ref. Bioprocessing-from Biotechnology to Biorefinery (S.T. Yang, Ed.), Elsevier Press, 2007.
  • 35. Stage Main product Vessels Process control Culture method Quality control Pilot Plant facilities Strain selection Pre 1900 -Alcohol -Vinegar Wooden vessels and copper used later Use of thermometer , hydrometer Batch Virtually Nil Nil Pure yeast and bacterial cultures 1900-1940 -Backer´s yeast -Glycerol -Citric acid -Lactic acid Vessels up to 200 m3 Mechanical stirring in small vessels Temp control pH control Batch Fed-batch Virtually Nil Virtually Nil Pure cultures 1940-date -Antibiotics -Amino acids -Transformation -Enzymes Stirred bioreac tor bioreac tor) tan k (tru e Sterilizable pH and DO electrodes Batch Fed- batch Continu ous Very important Becomes common Mutation an d selection programms 1964-date Single cell protein Pressure cycle and pressure jet vessels development Use of computer linked control loop Continu ous with recycli ng cultu re mediu m Very important Very important Genetic Engineering of producer strain attempted Stages of Industrial Biotechnology from 1900 to date
  • 36. 1979-date Production of heterologous proteins by microbial, animal cells, monoclonal antibodies More development in bioreactor design, Hollow fiber bioreactor, Animal cell bioreactor More developme nt in sensors and Control system. Immobiliezed cells Animal cell process Very important Very important Introduction of foreign genes into microbial and animal hosts 1985-date More heterologous protein production of growth factors More development in bioreactor design And agitation systems. Animal cell bioreactor On line Autoclava ble biosensor s contro l, High cell cultivatio n densit y Very important Very important Utilization of fungal cells as host for heterologous protein production 1995-date Increase in heterologous protein production using different cell factories More development in traditio nal cultivation vessels and new vessels New era in online control sensor s (replacable during process), biosensors High cell density, perfusion culture Very important Very important More cell factories used such as invertebrate cells and insect cells
  • 37. A typical growth curve consists of following stages a) Lag phase b) Acceleration phase c) Log or exponential phase d) Deceleration phase e) Stationary phase f) Death phase Growth Curve
  • 38. (a) Lag phase: Immediately after inoculation, there is no increase in the numbers of the microbial cells for some time and this period is called lag phase. In this is phase the organisms adjust to the new environment in which it is inoculated into. (b) Acceleration phase: The period when the cells just start increasing in numbers is known as acceleration phase. (c) Log phase: This is the time period when the cell numbers steadily increase. (d) Deceleration phase: The duration when the steady growth declines.
  • 39. (e) Stationary phase: The period where there is no change in the microbial cell number is the stationary phase. This phase is attained due to depletion of carbon source or accumulation of the end products. (f) Death phase: The period in which the cell numbers decrease steadily is the death phase. This is due to death of the cells because of cessation of metabolic activity and depletion of energy resources. Depending upon the product required the different phases of the cell growth are maintained. For microbial mass the log phase is preferred. For production of secondary metabolites i.e. antibiotics, the stationary phase is preferred.
  • 40. Growth kinetics of batch culture The number of living cells (population of growth rate dN/dt)varies with time in a batch system as shown below:
  • 41. where; LAG PHASE: Number of bacteria does not change with time in lag phase. LOG PHASE: Number of bacteria increases exponentially in log phase.
  • 42. During log phase the number of organisms in the reactor at any time t can be calculated, by using rate equation shown below:
  • 43. According to last equation, number of bacteria in the reactor at any time t during log phase can be calculated, as it is seen in the graph. This rate equation can be integrated:
  • 44. STATIONARYPHASE: There is no net change in number of bacteria with time in stationary phase. Bacteria divide but also die at equal rate. Most of the important biological products (especially secondary metabolites like antibiotics) or biomass are produced during this phase. The biomass concentration at stationary phase is determined by following equation X = Y. SR X=cell concentration Y= yield factor for limiting nutrient SR = original nutrient concentration in themedium
  • 45. Y’ measures the efficiency of a cellin converting nutrients into biomass So the biomass at a particular time in the during the fermentation is given by the following equation. X = Y (SR -s) S= nutrient concentration at particular time thus ‘Y’ is represented by the following equation Y = X/ (SR - s)
  • 47. Bioprocess development Objectives of bioprocess • Biomass production • Enzyme production • Metabolite production • Recombinant protein production • Metabolic biotransformation
  • 48. Bioprocess Optimization in Lab. scale (Development of cultivation strategy to reach the maximal productivity) Scaling up of the Process Down Stream (Separation/Isolation/Purification and increase of product Stability) Determination of process bottleneck(s)
  • 49. Stages in Bioprocess development • Upstream process- refers to the first step in which biomolecules are produced by biotic systems (micro-organism, cell-lines, or single cell chlorophytes) in bioreactors • Downstream process- refers to the recovery and purification of biosynthetic products, recycling salvageable components and proper effluent treatment and disposal. Bioprocess development and technology, Dr. Varsha C Mohanan, St.Mary’s College
  • 50. Scale-up of Bioprocess The main problem area • • Inoculum development Medium sterilization Aeration- Agitation Stages of scale up • • • Shake flasks Laboratory stirred Fermenters (Smallbioreactors) and Pilot scale Fermenters (Industrial bioreactors)
  • 51. From Petri-dish to Bioreactor
  • 52. Gujarat Biotechnology Research Centre (GBRC), recently established as an autonomous institute under Department of Science and Technology (DST), along with Ahmedabad based firms Hester Biosciences (poultry vaccine manufacturer) and OmniBRx have firmed up discussions with Bharat Biotech to scale up the COVAXIN technology and to produce minimum 20 million doses per month. Technology transfer agreement has been finalized. https://www.biospectrumindia.com/news/73/18646/gujarat-supports-scale-up-of-covaxin-production.html Image credit- shutterstock.com
  • 54. Since mid-1950s no major Change in STR Engineering Change mainly in: - Sampling system - Valves - Material Finish - Sensors (on-line, in-line and off- line) - Control system Bioreactor: The heart of Industrial Bioprocessing Facility
  • 55. Manufacturing Cost in Bioprocess Industries
  • 56. 1. Product 1. New Product discovery from different cell factories 2. Over-expression of certain metabolites (Pathways Engineering) 3. Production of new recombinant products 4. MAb revolution will continue 2. Biofactory 1. Discovery of new biofactories 2. Progress research in the omics approach for better pathways engineering 3. Expression system 1. Development of stronger expression systems 2. Process debottle-necking by genetic new approaches 4. Bioprocess 4.1 New economic media formulations (especially for higher Eukaryotic cells) 4. New Bioprocess design 5. Improved sensors and control system 6. Improvement in Downstream separation process (more solvent free processes) Applications
  • 57. Medium component Defined Component Un-defined Component Carbon source (Glucose,Fructose,Glycerol,xylose) (Sucrose, Starch) Molasses, Meat extract, Peptone, Plant extracts and Materials (Cellulosic, lignoncellulosic and hemicellulosic materials,Starch complex, etc…) Nitrogen source Ammonium and Nitrate Salts Yeast extract, Amino acid complex, Casein Phosphate Mono and di-phosphate salts In traces of complex C- andN- sources Sulphur Ammonium and Magnesium sulphate In traces of complex C- andN- sources Magnesium Mainly Magnesium sulphate In traces of complex C- andN- sources Mn, Mo, Fe, Zn, etc… In form of Inorganic salts In traces of complex C- andN- sources Vitamin and Growth factors Added in pure form of vitaminand growth factors preparation Yeast extract, and may found also as traces in some C- and N-sources General Composition of Cultivation Media
  • 58. Element % (w/w) of cell dry weight Bacteria Yeast Filamentous fungi Carbon 46-52 46-52 45-55 Nitrogen 10-14 6-9 4-7 Phosphorus 2-4 0.8-2.6 0.4-4.5 Sulphur 0.2-1.0 0.01-0.25 0.1-0.5 Magnesium 0.1-0.5 0.1-0.5 0.1-0.3 Sodium 0.5-1.0 0.01-0.1 0.02-0.5 Calcium 0.01-1.1 0.1-0.3 0.1-1.4 Iron 0.02-0.2 0.01-0.5 0.1-0.2 Manganese 0.001-0.01 0.0005-0.007 - Molybdenum- - 0.0001-0.0005 - Overviews on the elemental composition of the microorganisms
  • 59. Products of Industrial biotechnology Primary metabolites Secondary metabolites Organic acids and Polymers Alcohols Vitamins and Nutraceuticals Antibiotics Biopharmaceuticals Enzymes SCPs, Biofuels and Bioenergy Fine and specialty chemicals New materials Amino acids Microbial biomass Microbial Enzymes Recombinant proteins Biotransformation
  • 60. Color Essential oils Mint oil Mentha piperata Chamomile oil Ma. Chamomilla Jasmine oil Jasmine officinale Anissed oil Pim. anisum Anthocyanins V. vinifera Betalaines B. vulgaris Crocetins Gardenia jasminoides Anthraquinones Cinchon ledgeriana Flavors Sweeteners Stevioside Stevia rebaudiana Glycyrrhizin Glycyrrhiza glabra Thaumatin Thaumatococcus danielli Vanillin Va. Planifolia Garlic Allium sativum Onion Allium cepa Basmati Oryza sativa Citrus Citrus spp. Cocoa flavour Theobromo cacao Pharmaceuticals Hepato-protective Ligustrum robustum Anti-oxidant Artemisia judaica Anti-inflammatory Harpagophytum procumbens Anti-cancer Catharanthus roseus Anti-bacterial Ficus microcarpa Anti-fungal Backhousia citriodora Anti-ulcer Different plants Recombinant products Therapeutic proteins hGM-CSF HBsAg Interleukin-12 Ginseng h-lactoferrin vaccine production MAb Plant: Natural source of metabolites
  • 61. New Process for Plant Metabolites Production
  • 62. • It is independent of geographical and seasonal variations and various environmental factors • It offers a defined production system, which ensure continuous supply of products, uniform quality and yield • It is possible to produce novel compounds that are not normally found in parent plant • Efficient downstream recovery with low cost and minimum number of steps • High efficient production rate with significant short production time
  • 64. Cells as an end product Cells-derived product Artificial skin Growth factors Artificial organ -Hepatocyte (liver) -Beta-islet cells (pancreas) Hormones -Human growth hormones -Insulin Bone Marrow Interferons Lymphocytes Monoclonal antibodies Mammalian Cells Tissue Engineering Cell Culture
  • 65. Different levels for mammalian cells / insect cells cultivation Scaling up
  • 66. Different levels of cells cultivation Small scale (T-flask, 24 well) Spinner flask Rolling bottles Bioreactor Level (STR, Air-Lift, Hollow fiber) Shear Stress Mixing Cell Productivity Non- Optimized Semi- Optimized Fully- Optimized
  • 67. Processing and Production of recombinant products
  • 68. Recombinant DNATechnology • Revolutionized biology • Manipulation of DNA sequences and the construction of chimeric molecules, provides a means of studying how a specific segment of DNAworks • Studies in bacteria and bacterial viruses have led to methods to manipulate and recombine DNA • Once properly identified, the recombinant DNA molecules can be used in various ways useful in medicine and human biology
  • 71. Recombinant Pharmaceuticals • A number of human disorders can betraced to the absence or malfunction of a protein normally synthesized in the body • Most of these disorders can be treated by supplying the patient with the correct version of the protein • Hence, modern pharmaceutical manufacturing frequently relies upon recombinant drugs
  • 72. Recombinant Pharmaceuticals • Human Insulin • Human Growth Hormone • Human blood clotting factors • Vaccines • MonoclonalAntibodies • Interferons • Antibiotics & other secondary metabolites
  • 73. Human Insulin • Earliest use of recombinant technology • Modify E.coli cells to produce insulin; performed by Genentech in 1978 • Prior, bovine and porcine insulin used but induced immunogenic reactions • Also, there were many purification and contamination issues • Toovercome these problems, researchers inserted human insulin genes into a suitable vector (E.coli)
  • 75. Human Growth Hormones • Somatostatin and Somatotrophin are two proteins that act in conjunction to control growth processes in the human body, their malfunction leading to painful and disabling disorders such as Acromegaly (uncontrolled bone growth) and Dwarfism (Katznelson et al., 2014) • Somatostatin was the first human protein to be synthesized in E. coli. Being a very short protein, only 14 amino acids in length (Patel et al 1999), it was ideally suited for artificial gene synthesis • It’s production involves insertion of the artificial gene into a lacZ′ vector, synthesis of a fusion protein, and cleavage with cyanogen bromide
  • 76. Recombinant Blood Clotting Factors • Human factor VIII is a protein that plays a central role in blood clotting. • The commonest form of haemophilia in humans results from an inability to synthesize factor VIII • The complete human cDNA has been attached to the promoter for the whey acidic protein gene of pig, leading to synthesis of human factor VIII in pig mammary tissue and subsequent secretion of the protein in the milk. • The factor VIII produced in this way appears to be exactly the same as the native protein
  • 77. Recombinant Vaccines • Two types: (i)Recombinant protein vaccines: This is based on production of recombinant DNA which is expressed to release the specific protein used in vaccine preparation (Soler et al., 2007) (ii)DNA vaccines: Here the gene encoding for immunogenic protein is isolated and used to produce recombinant DNA which acts as vaccine to be injected into the individual (Z Cui et al 2005)
  • 79. Recombinant protein vaccines: • Pathogen produces its proteins in the body which elicit an immune response from the infected body • The gene encoding such a protein is isolated from the causative organism • This DNA is expressed in another host organism, like genetically engineered microbes; animal cells; plant cells; insect larvae etc, resulting in the release of appropriate proteins • These when injected into the body, causes immunogenic response against the corresponding disease providing immunity
  • 80. DNAvaccines • Recombinant vaccines in which the DNA is used as a vaccine. • The gene responsible for the immunogenic protein is identified, isolated and cloned with corresponding expression vector • Upon introduction into the individuals to be immunized, it produces a recombinant DNA • This DNA when expressed triggers an immune response and the person becomes successfully vaccinated • The mode of delivery of DNA vaccines include: direct injection into muscle; use of vectors like adenovirus, retrovirus etc; invitro transfer of the gene into autologous cells and reimplantation of the same and particle gun delivery of the DNA
  • 82. RecombinantAntibodies • An immunoglobulin which produced because of the introduction of an antigen into the body, and which possesses the ability to recognize the antigen. • No animals are needed in the manufacturing procedure of the recombinant antibodies, in addition, the manufacturing time is relatively short compared with the conventional method • Also, he quality of the final product is higher
  • 83. Production of RecombinantAntibodies The production of non-animal recombinant antibodies involves five steps: (1) creation of an antibody gene library (2) display of the library on phage coats or cell surfaces (3) isolation of antibodies against an antigen of interest (4) modification of the isolated antibodies and (5) scaled up production of selected antibodies in a cell culture expression system.
  • 84. Recombinant Secondary Metabolites • The importance of antibiotics to medicine has led to much research into their discovery and production • The importance of antibiotics to medicine has led to much research into their discovery and production • GM micro-organisms are used to increase production • Another technique used to increase yields is gene amplification, where copies of genes coding for enzymes involved in the antibiotic production can be inserted back into a cell, via vectors such as plasmids
  • 85. • GM micro-organisms are used to increase production • Another technique used to increase yields is gene amplification, where copies of genes coding for enzymes involved in the antibiotic production can be inserted back into a cell, via vectors such as plasmids • Plant secondary metabolites can also be produced by rDNA technology in plant suspension cultures, micro- organism cultures and hairy root cultures • A. rhizogenes mediated transformation which can transfer foreign genes into the transformed hairy root • E.g.: 6-hydroxylase gene of Hyoscyamus muticus which was introduced to Atropa belladonna using A. rhizogenes • Engineered roots showed an increased amount of enzyme activity and a five-fold higher concentration of scopolamine
  • 87. Challenges in Industrial bioprocessing •Agricultural raw materials are expensive •Lowcost materials like cellulose cannot be readily used for microbialprocess •Bioprocessis still not effective aschemical processing •Bioprocessingisanexpensiveaffair
  • 88. •Make Agriculture more competitive and sustainable •Improve quality of life of people while reducing impact by development of innovative and affordable products (common people can afford luxurious products) •Helps increase industrial economy and environmental efficiency and sustainability Benefits
  • 89. References • https://www.biospectrumindia.com/news/73/18646/g ujarat-supports-scale-up-of-covaxin-production.html • https://www.slideshare.net/SMCTCR/biotechnologybio process-development-and-technology • https://www.slideshare.net/tanvipotluri/production- of-recombinant-pharmaceuticals • https://www.slideshare.net/yongkangbirdnest/lecture- 2-introduction-to-bioprocess • https://www.slideshare.net/SripatiAbhiramSahoo/ferm entative-metabolism • https://www.slideshare.net/shashikala221977/ferment ation-technology-77873936