IL-2-mediated upregulation of uPA and uPAR in natural killer cells.

Abstract:

:Urokinase plasminogen activator (uPA) and its receptor uPAR play a major role in immune cell-mediated, including natural killer (NK) cell-mediated, degradation of extracellular matrices. Herein, we investigate the effects of IL-2 on NK cell uPA and uPAR. RNA and protein analyses showed upregulation of uPA and uPAR following IL-2 stimulation. Gel-shift assays and Western blots detected uPA and uPAR mRNA binding proteins (mRNABPs), previously shown to destabilize uPA and uPAR mRNA. Following IL-2 stimulation, a downregulation of uPAR mRNABP and a reciprocal induction of uPAR mRNA were noted. The increase in uPA following IL-2 stimulation appeared to be more transcriptionally regulated. These data suggest that IL-2 upregulates both uPA and uPAR in NK cells through posttranscriptional as well as transcriptional mechanisms, partially explaining increases in NK cell invasiveness following IL-2 stimulation.

authors

Al-Atrash G,Shetty S,Idell S,Xue Y,Kitson RP,Halady PK,Goldfarb RH

doi

10.1006/bbrc.2002.6627

subject

Has Abstract

pub_date

2002-03-22 00:00:00

pages

184-9

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006291X02966271

journal_volume

292

pub_type

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