Navigation Links
HIV vaccine strategy expands immune responses
Date:3/3/2010

LOS ALAMOS, New Mexico, March 3, 2010Two teams of researchersincluding Los Alamos National Laboratory theoretical biologists Bette Korber, Will Fischer, Sydeaka Watson, and James Szingerhave announced an HIV vaccination strategy that has been shown to expand the breadth and depth of immune responses in rhesus monkeys. Rhesus monkeys provide the best animal model currently available for testing HIV vaccines.

The research appeared in two back-to-back articles in Nature Medicine this week, and outlines a strategy, called "mosaic vaccines," for reducing the spread of HIV, the virus that causes AIDS.

HIV is an extremely variable virus. One of the most daunting challenges for developing an effective HIV vaccine is designing one that stimulates immune responses that will protect an individual from the highly diverse spectrum of strains of the circulating virus. The mosaic vaccine design uses computational methods developed at Los Alamos to create small sets of highly variable artificial viral proteins. These proteins, in combination, provide nearly optimal coverage of the diverse forms of HIV circulating in the world today.

In one of the two papers, Dr. Dan Barouch of Beth Israel Deaconess Medical Center at Harvard University reported very promising results when HIV mosaic vaccines were embedded in specialized vectorsorganisms that transmit pathogens to a hostthat were designed in his laboratory specifically to make strong "Killer T cell" responses. Killer T cells enable our immune system to recognize and kill virally infected cells, and they help clear or contain viral infections.

When this vaccine was used to immunize rhesus monkeys against HIV-1, the most predominant and transmittable type of the virus, the researchers observed up to four-fold improvement in the monkeys' immune response to HIV-1, compared with natural vaccine strains similar to those that have been used in the past. In the other, complementary study, Drs. Norman Letvin and Sampa Santra, also affiliated with the Beth Israel Deaconess Medical Center, and Dr. Barton Haynes of Duke University, used a distinct HIV mosaic vaccine construct that stimulated an immune response emphasizing "Helper T cells"the kinds of cells required to stimulate and control many aspects of an immune response. This study also showed an increased breadth and depth of anti-HIV immune responses to the vaccine. Both approaches demonstrated that mosaic vaccines improve the immune response against genetically diverse HIV-1 viruses.

"This research indicates that mosaic vaccines represent a promising strategy to expand coverage for genetically diverse pathogens such as HIV-1," Korber said. "The next step is to see whether the improved immune response found in Rhesus monkeys will hold up in humans, so small-scale human safety and immune response studies are being launched at Harvard and at Duke to explore that possibility."


'/>"/>

Contact: James E. Rickman
jamesr@lanl.gov
505-665-9203
DOE/Los Alamos National Laboratory
Source:Eurekalert

Related biology news :

1. Possible hepatitis C vaccine
2. Study by Pittsburgh researchers identifies possible vaccine target for chlamydia
3. New nanoparticle vaccine is more effective but less expensive
4. Flu vaccine in painless skin patches under development at Emory, Georgia Tech with NIH grants
5. Influenza vaccine causes weaker immune response for children of rural Gabon than in semi-urban areas
6. An Alzheimers vaccine?
7. Penn researchers find monkeys able to fend off AIDS-like symptoms with enhanced HIV vaccine
8. CWRU School of Medicine has evidence vaccine against malaria will reduce disease
9. HIV isolate from Kenya provides clues for vaccine design
10. Iowa State researchers look for smaller, cheaper, 1-dose vaccines
11. Vaccine for Ebola virus
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/21/2016)... WAKEFIELD, Massachusetts , March 22, 2016 ... and facial recognition with passcodes for superior security ... MESG ), a leading provider of secure digital communications ... pilot their biometric technology and offer enterprise customers, particularly ... provide secure facial recognition and voice authentication within a ...
(Date:3/17/2016)... ABI Research, the leader in transformative ... market will reach more than $30 billion by ... Consumer electronics, particularly smartphones, continue to boost the ... reach two billion shipments by 2021 at a ... Research Analyst at ABI Research. "Surveillance is also ...
(Date:3/15/2016)... , March 15, 2016 Yissum Research ... the technology-transfer company of the Hebrew University, announced today ... remote sensing technology of various human biological indicators. Neteera ... $2.0 million from private investors. ... on the detection of electromagnetic emissions from sweat ducts, ...
Breaking Biology News(10 mins):
(Date:5/4/2016)... ... 05, 2016 , ... CereScan, the nation’s leader in providing ... National Stroke Awareness Month in May. An infographic created by CereScan will ... CereScan will donate $1 up to a maximum of $3,000 through users who ...
(Date:5/4/2016)... ALBANY, New York , May 4, 2016 /PRNewswire/ ... published by Transparency Market Research "Metabolomics Market - Global ... - 2024", the metabolomics market is anticipated to expand ... to reach USD 2,494.8 million by 2024. ... known as metabolites, within cells, biofluids, tissues or organisms. ...
(Date:5/3/2016)... ... May 03, 2016 , ... In a list published by ... the state’s 76 fastest-growing private companies; a small percentage of the state's 615,000+ small ... on the percent change in revenue from 2012 to 2015. , As ...
(Date:5/3/2016)... -- - And Other Rising Companies - ... Competitor Biologics  - Biosimilar Drug Producers - ... Who are the most important and promising ... sales potentials? Discover, in our updated survey, organisations, outlooks ... revenue forecasting. Visiongain,s new study ...
Breaking Biology Technology: