Plant Produced Viral Vaccines and Anti-viral Sera

Silver-haired Bat
(Lasionycteris noctivagans)
• Vector of cryptic rabies
virus
• 1990-2002: ~70% of 33
reported human rabies
cases in the US
• Only 2 cases had a
history of bat bite
Plant System For High-Yield Production of
Recombinant Subunit Vaccines
Vaccine Production in Plants





Safety
Cost-efficiency
Easy scale-up
Proper glycosylation
Suitable for developing
countries
 Possible direct delivery
RABIES VIRUS NEUTRALIZING
TITERS OF HUMAN SERA
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
Pre-I
Pre-B
Post-B
1
2
CONTROL
3
4
5
6
7
8
EXPERIMENTAL
BIOMEDICALS FOR DISEASE PROPHYLAXIS AND TREATMENT
EXPRESSED IN PLANTS AT THE BIOTECHNOLOGY FOUNDATION LABORATORIES
DISEASES
PLANT
VACCINE
Tobacco
Tomato
Cauliflower
●
●
Tobacco
Tomato
Spinach
●
●
●
Respiratory
Syncytial Virus
(RSV)
Tobacco
Swiss Chard
●
●
Smallpox
Collard
Swiss Chard
●
●
Diphtheria,
Pertussis, Tetanus
(DPT)
Carrot
Tobacco
●
Rabies
Spinach
Collard
Tobacco
●
●
●
Spinach
●
Barley
(recently
initiated)
Lettuce
Cauliflower
●
●
Tobacco
●
Severe Acute
Respiratory
Syndrome (SARS)
Anthrax
HIV
Avian Influenza
Hepatitis B
Colorectal and
Breast Cancer
Antibody
●
●
●
COMPARATIVE COSTS OF ANTI-RABIES ANTIBODIES
COMPANY
NAME
PRODUCT
SOURCE
PRODUCT
DESCRIPTION
PRODUCT
Bayer
BayRab
Human
Donors
human anti-Rabies
immunoglobulins
1500 iu
$1,125.
Aventis
IMOGAM
Rabies-HT
Human
Donors
anti-Rabies
immunoglobulins
(10-18% protein)
1500 iu
$ 847.
wholesale
price
AbCam
ab10014
Mouse
Cells
Biotechnology MAb57
Foundation, Inc.
Tobacco
monoclonal mouse
antibodies
monoclonal mouse
PRICE
100 µg
$ 250.
100 µg
$ 0.5 -$1.