Open Access

The influence of 8-prenylnaringenin on the activity of voltage-gated kv1.3 potassium channels in human jurkat t cells

  • Justyna Gąsiorowska1,
  • Andrzej Teisseyre1Email author,
  • Anna Uryga1 and
  • Krystyna Michalak1
Cellular & Molecular Biology LettersAn International Journal201217:29

https://doi.org/10.2478/s11658-012-0029-0

Received: 2 February 2012

Accepted: 23 August 2012

Published: 29 August 2012

Abstract

Using the whole-cell patch-clamp technique, we investigated the influence of 8-prenylnaringenin on the activity of the voltage-gated Kv1.3 potassium channels in the human leukemic T lymphocyte cell line Jurkat. 8-prenylnaringenin is a potent plant-derived phytoestrogen that has been found to inhibit cancer cell proliferation. The results show that it inhibited the Kv1.3 channels in a concentration-dependent manner. Complete inhibition occurred at concentrations higher than 10 μM. The inhibitory effect of 8-prenylnaringenin was reversible. It was accompanied by a significant acceleration of channel inactivation without any pronounced change in the activation rate. Of the naringenin derivatives tested to date, 8-prenylnaringenin is the most potent inhibitor of the Kv1.3 channels. The potency of the inhibition may be due to the presence of a prenyl group in the molecule of this flavonoid. The inhibition of the Kv1.3 channels might be involved in the antiproliferative and pro-apoptotic effects of 8-prenylnaringenin that have been observed in cancer cell lines expressing these channels.

Key words

8-prenylnaringenin Kv1.3 channel Jurkat T lymphocytes Patchclamp Cancer cell proliferation Cancer cell apoptosis

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