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1994-08-20
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Document 0417
DOCN M9480417
TI Lymphocytes and promonocytes attach to the synthetic [Tyr5,12, Lys7]-
polyphemusin II peptide.
DT 9410
AU Weeks BS; Nomizu M; Otaka A; Weston CA; Okusu A; Tamamura H; Matsumoto
A; Yamamoto N; Fujii N; Department of Biology, Hamilton College,
Clinton, New York 13323.
SO Biochem Biophys Res Commun. 1994 Jul 15;202(1):470-5. Unique Identifier
: AIDSLINE MED/94311923
AB The [Tyr5,12,Lys7]-polyphemusin II peptide (T22) has been shown to
inhibit HIV-1 replication in lymphocytes. The mechanism of T22
inhibition of HIV-1 replication is not known but may involve T22
competition with HIV-1 for attachment sites on the plasma membrane of
targeted cells. Here we find that three human immunocyte cell lines (H9,
Jurkat, and U-937) attach to T22. The phorbol ester,
12-O-tetradecanoylphorbol 13-acetate (TPA), has been shown to activate
intracellular protein kinase C and to stimulate lymphocyte attachment to
various substrates through specific cell surface receptors. Here we find
that TPA treatment enhances attachment of the immunocytes to T22 by
three- to four-fold. These data demonstrate that T22 binds to immunocyte
cell surfaces and support the hypothesis that T22 may inhibit HIV-1
replication by competing with the virus for a common cell surface
receptor(s).
DE Amino Acid Sequence Cell Adhesion/DRUG EFFECTS Cell Line Human
HIV-1/DRUG EFFECTS/PHYSIOLOGY Isoquinolines/PHARMACOLOGY Kinetics
Lymphocytes/*PHYSIOLOGY Molecular Sequence Data Monocytes/*PHYSIOLOGY
Peptides/*METABOLISM/PHARMACOLOGY Phorbol Esters/PHARMACOLOGY
Piperazines/PHARMACOLOGY Tetradecanoylphorbol Acetate/PHARMACOLOGY
Tumor Cells, Cultured Virus Replication/DRUG EFFECTS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).