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M9480205.TXT
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1994-08-09
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Document 0205
DOCN M9480205
TI Effect of p40tax trans-activator of human T cell lymphotropic virus type
I on expression of autoantigens.
DT 9410
AU Banki K; Ablonczy E; Nakamura M; Perl A; Department of Medicine, State
University of New York, Syracuse; 13210.
SO AIDS Res Hum Retroviruses. 1994 Mar;10(3):303-8. Unique Identifier :
AIDSLINE MED/94289069
AB The possibility of a retroviral etiology has long been raised in a
number of autoimmune disorders. More recently, Sjogren's syndrome and
rheumatoid arthritis were noted in transgenic mice carrying the tax gene
of human T cell leukemia virus type I (HTLV-I). To evaluate the
involvement of HTLV-I Tax in autoimmunity, its effect on expression of
autoantigens was investigated. A metallothionein promoter-driven p40tax
expression plasmid, pMAXRHneo-1, was stably transfected into Molt4 and
Jurkat cells and the p40tax protein was induced with CdCl2.
trans-Activation or trans-repression of autoantigens by HTLV-I Tax was
studied by Western blot analysis utilizing autoantigen-specific murine
monoclonal and rabbit polyvalent antibodies as well as sera from 161
autoimmune patients. Induction of p40tax of HTLV-I had no significant
effect on levels of expression of common autoantigens U1 snRNP, Sm, Ro,
La, HSP-70, topoisomerase I/Scl70, PCNA, and HRES-1. Expression of two
potentially novel autoantigens, 44 and 46 kDa, was induced by p40tax as
detected by sera of progressive systemic sclerosis patients, BAK and
VAR. By contrast, expression of 24- and 34-kDa proteins was suppressed
in response to induction of p40tax as detected by sera of systemic lupus
erythematosus patients PUS and HOR. Because none of these patients were
infected by HTLV-I, a protein functionally similar to p40tax may be
involved in eliciting autoantigen expression and a subsequent
autoantibody response in a minority of patients with PSS and SLE. Sera
of autoimmune patients may also be utilized to detect novel proteins
trans-activated or trans-repressed by p40tax of HTLV-I.
DE Autoantigens/*BIOSYNTHESIS Autoimmunity Blotting, Western Cell Line
Gene Products, tax/GENETICS/*IMMUNOLOGY Human
HTLV-I/GENETICS/*IMMUNOLOGY Support, Non-U.S. Gov't Support, U.S.
Gov't, P.H.S. T-Lymphocytes/*IMMUNOLOGY Trans-Activation (Genetics)
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).