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M94A0002.TXT
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1994-10-01
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3KB
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Document 0002
DOCN M94A0002
TI Tumour necrosis factor alpha and interleukin-1 beta induce specific
subunits of NFKB to bind the HIV-1 enhancer: characterisation of
transcription factors controlling human immunodeficiency virus type 1
gene expression in neural cells.
DT 9412
AU Swingler S; Morris A; Easton A; Department of Biological Sciences,
University of Warwick,; Coventry, UK.
SO Biochem Biophys Res Commun. 1994 Aug 30;203(1):623-30. Unique Identifier
: AIDSLINE MED/94354868
AB In human astrocytoma and neuroblastoma cell lines tumour necrosis factor
alpha (TNF alpha) and interleukin 1 beta (IL-1 beta) induced NFKB and an
additional KB-specific protein of approximately 80 K to bind the HIV-1
enhancer. One nucleoprotein complex contained prototypical NFKB
comprising of p50 and p65 subunits and a second contained the p65
subunit and an 80 K factor, p80. Over a 24 hr period of cytokine
stimulation the p50/p65 complex of NFKB was present in the nucleus
whilst the second complex declined in abundance after two hours due to
the decline of p80. In unstimulated cells, DNAse I footprinting revealed
a previously unidentified octamer-like binding site in the negative
regulatory element (NRE) of the HIV-1 long terminal repeat (LTR) which
specifically bound protein factors present in human astrocytoma,
neuroblastoma and murine oligodendroglioma cell lines. A second unique
motif, also in the NRE, was observed with extracts from one human
neuroblastoma cell line and a murine oligodendroglioma. Footprinting
analysis also confirmed that Sp1, TATA, Site A and Site B motifs of the
LTR were occupied by nuclear factors present in neural cells.
DE Astrocytoma Base Sequence Binding Sites Cell Line Cell
Nucleus/METABOLISM Deoxyribonuclease I DNA, Neoplasm/METABOLISM
*Enhancer Elements (Genetics) Human HIV-1/*GENETICS/METABOLISM
Interleukin-1/*PHARMACOLOGY Macromolecular Systems Molecular Sequence
Data Neuroblastoma Neurons/METABOLISM NF-kappa B/*METABOLISM
Oligodeoxyribonucleotides Support, Non-U.S. Gov't Transcription
Factors/*METABOLISM Tumor Cells, Cultured Tumor Necrosis
Factor/*PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).