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HIV-1 gp160 decreases the K+ voltage-gated current from Jurkat E6.1 T cells by up-phosphorylation.

O Dellis, F Bouteau, M Guenounou, J P Rona

FEBS Lett., 1999 Jan 25 , 443, 187-91

HIV-1 gp120/gp160 is known to disturb the activity of p56lck, protein kinase C (PKC) and Ca2+ homeostasis in T lymphocytes. We found that gp160 decreases the Kv1.3 current of Jurkat E6.1 cells probably by increasing the PKC-dependent phosphorylation of Kv channel protein after 5 days. This decrease is dose-dependent. In contrast, gp160 did not decrease the Kv1.3 current of the JCaM1.6 cell line, a p56(lck)-defective Jurkat cell line. This shows that p56lck was at the beginning of the events which induced the Kv1.3 current decrease. As a consequence of this decrease, Jurkat E6.1 cells were depolarized and exhibited a volume increase.

http://www.ncbi.nlm.nih.gov/pubmed/9989602