Endocrinology, Vol 128, 2053-2057, Copyright © 1991 by Endocrine Society

ARTICLES

An antisense oligodeoxynucleotide to growth hormone messenger ribonucleic acid inhibits lymphocyte proliferation

DA Weigent, JE Blalock and RD LeBoeuf
Department of Physiology and Biophysics, University of Alabama, Birmingham 35294.

The role of GH in lymphocyte proliferation was studied by examining the effect of an antisense oligodeoxynucleotide (ODN) complementary to GH mRNA. The results of these studies showed that antisense GH ODN treatment inhibits lymphocyte production of immunoreactive GH (irGH). Lymphocytes treated with the GH antisense ODN produced less irGH than did lymphocytes treated with control sense GH ODN. Antisense GH ODN- mediated inhibition of irGH production resulted in a decrease in lymphocyte proliferation. Cells with the antisense GH ODN had less (87%) incorporation of [3H]thymidine [( 3H]TdR) in both resting and Concanavalin-A-stimulated lymphocytes, whereas the incorporation of [3H]TdR in cells treated with a control ODN was not significantly affected. The effect of the antisense ODN on [3H]TdR incorporation was specific, since it could be reversed by hybridization competition with a complementary GH sense ODN or by the addition of exogenous rat GH. Collectively, the data indicate that lymphocytes synthesize and secrete irGH and that irGH produced by these cells can stimulate proliferation, suggesting that GH may play an autocrine/paracrine role in lymphocyte replication.

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