Analysis of the K+ current in human CD4+ T lymphocytes in hypercholesterolemic state.

Abstract:

:Atherosclerosis involves immune mechanisms: T lymphocytes are found in atherosclerotic plaques, suggesting their activation during atherogenesis. The predominant voltage-gated potassium channel of T cells, Kv1.3 is a key regulator of the Ca(2+)-dependent activation pathway. In the present experiments we studied the proliferation capacity and functional changes of Kv1.3 channels in T cells from healthy and hypercholestaeremic patients. By means of CFSE-assay (carboxyfluorescein succinimidyl ester) we showed that spontaneous activation rate of lymphocytes in hypercholesterolemia was elevated and the antiCD3/antiCD28 co-stimulation was less effective as compared to the healthy group. Using whole-cell patch-clamping we obtained that the activation and deactivation kinetics of Kv1.3 channels were faster in hypercholesterolemic state but no change in other parameters of Kv1.3 were found (inactivation kinetics, steady-state activation, expression level). We suppose that incorporation of oxLDL species via its raft-rupturing effect can modify proliferative rate of T cells as well as the gating of Kv1.3 channels.

journal_name

Cell Immunol

journal_title

Cellular immunology

authors

Somodi S,Balajthy A,Szilágyi O,Pethő Z,Harangi M,Paragh G,Panyi G,Hajdu P

doi

10.1016/j.cellimm.2013.01.004

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

20-6

issue

1

eissn

0008-8749

issn

1090-2163

pii

S0008-8749(13)00010-5

journal_volume

281

pub_type

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