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Activation of the human immunodeficiency virus-1 long terminal repeat by respiratory burst oxidants of neutrophils.

Abstract：

:The human immunodeficiency virus type 1 (HIV-1) long terminal repeat (LTR) introduced in association with the luciferase reporter gene into Jurkat T cells was strongly activated by a combination of human neutrophils and phorbol myristate acetate (PMA). Activation was not observed when normal neutrophils were replaced by neutrophils which lack a respiratory burst, ie, from a patient with chronic granulomatous disease (CGD), was strongly inhibited by catalase, was potentiated by vanadate, was stimulated by relatively low concentrations of azide, and was inhibited by selective inhibitors of protein kinase C (PKC). The PMA affected activation in three ways: (1) by directly activating the LTR in Jurkat LTRluc; (2) by inducing a respiratory burst in neutrophils with the formation of H2O2; and (3) by increasing the sensitivity of Jurkat LTRluc to the activating effect of H2O2. When PMA was replaced by opsonized zymosan as the neutrophil stimulus, activation of the LTR was low unless azide was added. Activation in the presence of azide was not seen when CGD neutrophils were used or when catalase was added, suggesting that azide acts by inhibiting the degradation of H2O2. These findings indicate that activation of the HIV-1 LTR in Jurkat T cells can be induced by H2O2 released by neutrophils, particularly when PKC is concomitantly activated.

journal_name

Blood

journal_title

Blood

authors

Klebanoff SJ,Headley CM

subject

Has Abstract

pub_date

1999-01-01 00:00:00

pages

350-6

issue

1

eissn

0006-4971

issn

1528-0020

journal_volume

93

pub_type

杂志文章

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