DNA Vaccine
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DNA vaccines work by injecting DNA encoding antigens from pathogens. The host cells use this DNA to produce antigens, which are then displayed on the cell surface and trigger both humoral and cellular immune responses. DNA vaccines offer advantages over traditional vaccines like avoiding infectious organisms, not requiring refrigeration, and stimulating both arms of the immune system. They have shown protection against diseases in animal studies and have potential applications for influenza, hepatitis B, HIV, and malaria vaccines. However, DNA vaccines also have disadvantages like weak immune responses in humans.
![REFERENCES
1. Wolff JA, Malone RW, Williams P, et al. Direct gene
transfer into mouse muscle in
vivo. Science.1990;247(4949 Pt 1):1465–8. [PubMed]
2. Klinman DM, Yamshchikov G, Ishigatsubo Y. Contribution
of CpG motifs to the immunogenicity of DNA vaccines. J
Immunol. 1997;158(8):3635–9. [PubMed]
3. Khan KH. Vectors Used in Gene Manipulation – A
retrospective. Advanced Biotech Journal - Online -
Tutorial review. 2009;9(2):1–8
4. Corr M, Lee DJ, Carson DA, et al. Gene vaccination with
naked plasmid DNA: mechanism of CTL priming. J Exp
Med. 1996;184(4):1555–60. [PMC free article] [PubMed]
5. http://www.mdpi.com/2076-393X/1/3/225/htm](https://image.slidesharecdn.com/dna-vaccine-final-161225130911/85/DNA-Vaccine-18-320.jpg)
DNA Vaccine
- 1. Presented by- Rahima Akhter Nury: 132 1722 046 Suraiya Ahmed: 132 0916 046 Anik khan: 132 0430 046 MD Isfat Hasan Tomal: 132 0378 046 Ramisha Rifat Tony: 132 0332 646
- 3. What is DNA vaccine? • DNA vaccines are the vaccines which contain DNA that codes for specific proteins (antigens) from a pathogen. • The DNA is injected into cells • uses the DNA to synthesize the proteins • Because these proteins are recognized as foreign, when they are processed by the host cells and displayed on their surface, the immune system is alerted, • which then triggers immune responses.
- 4. Why DNA vaccines? This approach offers a number of potential advantages over traditional approaches Uses only the DNA from infectious organisms. Avoid the risk of using actual infectious organism. Provide both Humoral & Cell mediated immunity Refrigeration is not required DNA vaccines Traditional vaccines Uses weakened or killed form of infectious organism. Create possible risk of the vaccine being fatal. Provide primarily Humoral immunity Usually requires Refrigeration.
- 5. Including : • the stimulation of both B- and T-cell responses, • improved vaccine stability, • the absence of any infectious agent • the relative ease of large-scale manufacture. • immune responses in animals have been obtained using genes from a variety of infectious agents, including influenza virus, hepatitis B virus, human immunodeficiency virus, rabies virus, malarial parasites etc. • In some cases, protection from disease in animals has also been obtained.
- 6. Viral gene Recombinant DNA Technology Expression plasmid Plasmid with foreign gene Principal of DNA Vaccine?
- 7. Transform in to bacteria Plasmid DNA get Amplified
- 8. Plasmid DNA isolated Stored in vials Ready for Apply
- 10. Pneumatic Jet Injection: Very high amount of vaccine applied to the abdominal skin.
- 11. How DNA vaccines work?? By 2 Pathway : 1. Endogenous pathway 2. Exogenous pathway
- 14. ADVANTAGES
- 15. DISADVANTAGES
- 16. APPLICATIONS
- 17. CONCLUSION
- 18. REFERENCES 1. Wolff JA, Malone RW, Williams P, et al. Direct gene transfer into mouse muscle in vivo. Science.1990;247(4949 Pt 1):1465–8. [PubMed] 2. Klinman DM, Yamshchikov G, Ishigatsubo Y. Contribution of CpG motifs to the immunogenicity of DNA vaccines. J Immunol. 1997;158(8):3635–9. [PubMed] 3. Khan KH. Vectors Used in Gene Manipulation – A retrospective. Advanced Biotech Journal - Online - Tutorial review. 2009;9(2):1–8 4. Corr M, Lee DJ, Carson DA, et al. Gene vaccination with naked plasmid DNA: mechanism of CTL priming. J Exp Med. 1996;184(4):1555–60. [PMC free article] [PubMed] 5. http://www.mdpi.com/2076-393X/1/3/225/htm