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M9620397.TXT
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1996-02-26
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Document 0397
DOCN M9620397
TI Functional epitope analysis of the human CD4 molecule: antibodies that
inhibit human immunodeficiency virus type 1 gene expression bind to the
immunoglobulin CDR3-like region of CD4.
DT 9602
AU Benkirane M; Hirn M; Carriere D; Devaux C; Laboratoire d'Immunologie des
Infections Retrovirales, Centre; National de la Recherche Scientifique
UPR 9008-Institut National; de la Sante et de la Recherche Medicale
U249, Montpellier,; France.
SO J Virol. 1995 Nov;69(11):6898-903. Unique Identifier : AIDSLINE
MED/96013789
AB We recently demonstrated that monoclonal antibody (MAb) 13B8-2, specific
for the immunoglobulin (Ig) complementary determining region 3
(CDR3)-like region of the CD4 molecule, inhibits viral transcription in
human immunodeficiency virus (HIV)-infected CEM cells and HIV type 1
(HIV-1) promoter activity. Here, we have studied the capacity of several
MAb specific for the D1 domain of CD4, including anti-CDR2-like (Leu-3a
and ST4) and anti-CDR3-like (13B8-2 and ST40) MAb, and for the D2 domain
of CD4 (BL4) to inhibit both provirus transcription in HIV-1LAI-infected
CEM cells and transcription of the chloramphenicol acetyltransferase
(CAT) gene under control of the HIV-1 long terminal repeat in
transiently transfected CEM cells. We found that HIV-1 promoter activity
and provirus transcription are inhibited only by MAb that bind to the
CDR3-like region in domain 1 of CD4. Moreover, we demonstrated that the
Fab fragment of an anti-CDR3-like region-specific anti-CD4 MAb is a
powerful inhibitor of HIV-1 promoter activity. These results have
implications for understanding the role of the CDR3-like region in CD4
T-cell signaling, which controls provirus transcription.
DE Antibodies, Monoclonal/IMMUNOLOGY/*PHARMACOLOGY Antigens,
CD4/*IMMUNOLOGY/PHYSIOLOGY Binding Sites Cell Line Chloramphenicol
Acetyltransferase/BIOSYNTHESIS Epitopes/*ANALYSIS *Gene Expression
Human *HIV Long Terminal Repeat HIV-1/*GENETICS/*IMMUNOLOGY
Polymerase Chain Reaction Receptor-CD3 Complex, Antigen,
T-Cell/*IMMUNOLOGY/PHYSIOLOGY Recombinant Proteins/BIOSYNTHESIS RNA
Splicing RNA, Viral/BIOSYNTHESIS Support, Non-U.S. Gov't Transfection
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).