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─ Area: AIDS-HIV - R ─────────────────────────────────────────────────────────
Msg#: 478 Date: 01-05-93 16:23
From: Billi Goldberg Read: Yes Replied: No
To: All Mark:
Subj: (12) CDC SUMMARY 1/4/93
──────────────────────────────────────────────────────────────────────────────
-=> Quoting Billi Goldberg to All <=-
BG> "Cellular Proteins Bound to Immunodeficiency Viruses: Implications
BG> for Pathogenesis and Vaccines" Science (12/18/92) Vol. 258, No. 5090,
BG> P. 1935 (Arthur, Larry O. et al.)
BG> Cellular proteins linked with immunodeficiency viruses play a
BG> primary role in infection and pathogenesis, write Larry O. Arthur et
BG> al. of the National Cancer Institute--Frederick Cancer Research and
BG> Development Center in Frederick, Md. Cellular proteins associated
BG> with immunodeficiency viruses were identified by determination of the
BG> amino acid sequence of the proteins and peptides present in sucrose
BG> density gradient-purified HIV-1, HIV-2, and simian immunodeficiency
BG> virus (SIV). B2 microglobulin (B2m) and the a and B chains of human
BG> lymphocyte antigen (HLA) DR were present in virus preparations at one-
BG> fifth the concentration of Gag on a molar basis. Antisera to HLA DR,
BG> B2m as well as HLA class I precipitated intact viral particles,
BG> suggesting that these cellular proteins were physically associated
BG> with the surface of the virus. Whether the cellular proteins are
BG> components of the viral envelope acquired during budding or are
BG> acquired after budding by specific associations is an important
BG> mechanistic consideration that can now be addressed. It is likely
BG> that immune responses to HLA DR, HLA class I, or B2m (or to all three
BG> cellular proteins) were involved in the protection against SIV
BG> infection after immunization with uninfected human cells. These
BG> proteins should be considered in elucidation of the steps involved in
BG> infection, design of vaccines, preparation of experimental virus-
BG> challenge stocks, and determination of the pathological mechanisms of
BG> immunodeficiency viruses, the researchers conclude.
BG> -!-
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