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EDIBLE 
VACCINES-A 
new approach to oral 
immunization 
Presented by- Anurag Chanda 
B.Pharm 3rd Year, 6th semester 
18601911014
Introduction- 
 Plants offer enormous potential as 
production platform for vaccines 
 The stable integration of a gene into 
the plant nuclear or chloroplast 
genome can transform plants like 
tobacco, potato, tomato, banana into 
bioreactors for the production of sub-unit 
vaccines. 
 Owing to its low cost of production it is 
suitable for developing countries like 
India
Advantages 
- Edible means of administration. 
 Reduced means of medical 
personnel and sterile injection 
conditions. 
 Economical in mass production 
and transportation. 
 Heat stable and eliminating the 
use of refrigeration. 
 Delivery of multiple antigens.
Plant 
species- 
Potato : 
Advantage 
Easily transformed. 
Easily propagated. 
Stored for long periods without 
refrigeration. 
Disadvantage 
Need cooking which denature 
antigen. 
Banana 
Advantages 
Do not need cooking. 
Protein not destroyed even after 
cooking. 
Inexpensive . 
Grown widely in developing 
countries. 
Disadvantages 
Trees take 2-3 to mature years. 
Spoils rapidly after ripening. 
Rice 
Advantages 
Commonly used in baby food. 
High expression of antigen. 
Disadvantages 
Grows slowly. 
Requires glasshouse condition. 
Tomato 
Advantage 
Grow quickly. 
Cultivate broadly. 
High content Vitamin-A may boost 
immune response. 
Disadvantages 
Spoils readily.
Oral delivery, mucosal and 
systemic antibody responses- 
 Plant derived vaccines have 
demonstrated the ability to induce 
both systemic and mucosal immune 
responses. 
 The major obstacle to oral vaccination 
is the digestion of the antigenic protein 
in the stomach. 
 Vaccines derived and delivered by 
plant cells have been shown to over 
come this problem through the 
protective effect of the plant cell wall.
A unique opportunity against the threat of 
bio-weapons 
•A number of infectious diseases, including smallpox, 
anthrax, and plague have recently raised concern for 
their possible use in the actions of bio-terrorism. 
•Nations at risk are now faced with the need to be 
ready to vaccinate part of all their population within 
limited periods of time. 
•This means that millions of vaccine does have to be 
prepared, stored and renewed at intervals of time. 
•The economic and technical benefits offered by plant 
derived vaccines propose these as the ideal 
substitutes fro traditional vaccines. 
•Research on plants that produce antigens against 
major pathogens feared in case of bio-terrorism is 
already under way.
Dosage- to explain the concept of oral therapeutic protein delivery , 
Hepatitis B surface antigen(HBsAg) was used for oral immunization. No 
primary immune response was detected after two 300 microgram doses 
of yeast derived HBsAg. However a primary immune response began 
after two servings of transgenic potatoes containing, 85-300micrograms 
of HBsAg. 
Side effects- A research by National Institute Of Allergy & 
Infectious Diseases(NIAID), National Institute Of Health(NIH) and 
Maryland School Of Medicine showed no significant side effects. 
Limitations- 
•Development of immune tolerance to vaccine peptide or 
protein. 
•Consistency of dosage from fruit to fruit and from plant to 
plant and from generation to generation is not similar. 
•Selection of best plant in difficult. 
•Certain foods like potato are not eaten raw and cooking 
the food might weaken the medicine present in it.
 Plant-based production of biopharmaceuticals. 
Rainer Fischer, Eva Stoger, Stefan Schillberg, Paul Christou and 
Richard M Twyman, Current Opinion in Plant Biology 2004, 152– 
158. 
 Edible vaccines: a new approach to oral immunization. 
Neeraj Mishra, Prem N Gupta, Kapil Khatri, amit K Goyal, Suresh P 
Vyas. Indian Journal Of Biotechnology.283-294. 
 Edible Vaccines by William H.R Langridge. 
Scientific American. 66-71

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Edible vaccines

  • 1. EDIBLE VACCINES-A new approach to oral immunization Presented by- Anurag Chanda B.Pharm 3rd Year, 6th semester 18601911014
  • 2. Introduction-  Plants offer enormous potential as production platform for vaccines  The stable integration of a gene into the plant nuclear or chloroplast genome can transform plants like tobacco, potato, tomato, banana into bioreactors for the production of sub-unit vaccines.  Owing to its low cost of production it is suitable for developing countries like India
  • 3.
  • 4. Advantages - Edible means of administration.  Reduced means of medical personnel and sterile injection conditions.  Economical in mass production and transportation.  Heat stable and eliminating the use of refrigeration.  Delivery of multiple antigens.
  • 5. Plant species- Potato : Advantage Easily transformed. Easily propagated. Stored for long periods without refrigeration. Disadvantage Need cooking which denature antigen. Banana Advantages Do not need cooking. Protein not destroyed even after cooking. Inexpensive . Grown widely in developing countries. Disadvantages Trees take 2-3 to mature years. Spoils rapidly after ripening. Rice Advantages Commonly used in baby food. High expression of antigen. Disadvantages Grows slowly. Requires glasshouse condition. Tomato Advantage Grow quickly. Cultivate broadly. High content Vitamin-A may boost immune response. Disadvantages Spoils readily.
  • 6.
  • 7. Oral delivery, mucosal and systemic antibody responses-  Plant derived vaccines have demonstrated the ability to induce both systemic and mucosal immune responses.  The major obstacle to oral vaccination is the digestion of the antigenic protein in the stomach.  Vaccines derived and delivered by plant cells have been shown to over come this problem through the protective effect of the plant cell wall.
  • 8.
  • 9. A unique opportunity against the threat of bio-weapons •A number of infectious diseases, including smallpox, anthrax, and plague have recently raised concern for their possible use in the actions of bio-terrorism. •Nations at risk are now faced with the need to be ready to vaccinate part of all their population within limited periods of time. •This means that millions of vaccine does have to be prepared, stored and renewed at intervals of time. •The economic and technical benefits offered by plant derived vaccines propose these as the ideal substitutes fro traditional vaccines. •Research on plants that produce antigens against major pathogens feared in case of bio-terrorism is already under way.
  • 10. Dosage- to explain the concept of oral therapeutic protein delivery , Hepatitis B surface antigen(HBsAg) was used for oral immunization. No primary immune response was detected after two 300 microgram doses of yeast derived HBsAg. However a primary immune response began after two servings of transgenic potatoes containing, 85-300micrograms of HBsAg. Side effects- A research by National Institute Of Allergy & Infectious Diseases(NIAID), National Institute Of Health(NIH) and Maryland School Of Medicine showed no significant side effects. Limitations- •Development of immune tolerance to vaccine peptide or protein. •Consistency of dosage from fruit to fruit and from plant to plant and from generation to generation is not similar. •Selection of best plant in difficult. •Certain foods like potato are not eaten raw and cooking the food might weaken the medicine present in it.
  • 11.  Plant-based production of biopharmaceuticals. Rainer Fischer, Eva Stoger, Stefan Schillberg, Paul Christou and Richard M Twyman, Current Opinion in Plant Biology 2004, 152– 158.  Edible vaccines: a new approach to oral immunization. Neeraj Mishra, Prem N Gupta, Kapil Khatri, amit K Goyal, Suresh P Vyas. Indian Journal Of Biotechnology.283-294.  Edible Vaccines by William H.R Langridge. Scientific American. 66-71