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Mamu-A*01 allele has protective effect in animals.

Vaccine Weekly

| January 01, 2003 | COPYRIGHT 2003 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2003 JAN 1 - (NewsRx.com & NewsRx.net) -- by Michael Greer, senior medical writer - Researchers in the United States have identified a genetic factor that protects primates against AIDS.

Zhi-Qiang Zhang and colleagues working at Merck Research Laboratories in West Point, Pennsylvania, " investigated the expression of the MHC class I allele Mamu-A*01 in simian-human immunodeficiency virus (SHIV) infection, one of the major models for evaluation of AIDS vaccine candidates."

This allele was associated with delayed disease progression and a lower degree of lymphoid tissue damage, Zhang and coauthors found.

The researchers examined the impact of Mamu-A*01 expression in rhesus monkeys. Study animals were infected with the extremely virulent 89.6P strain of SHIV, they noted.

Rhesus monkeys positive for Mamu-A*01 demonstrated significantly slower disease progression than animals without this allele. Delayed progression was partly due to potent and Mamu-A*01-restricted cytotoxic T-lymphocyte (CTL) activity, according to the report.

In addition, Mamu-A*01 expression prevented the "massive" lymph node damage seen in infected animals lacking this allele ...

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