KCa2.3 channel-dependent hyperpolarization increases melanoma cell motility. - Inserm - Institut national de la santé et de la recherche médicale Accéder directement au contenu
Article Dans Une Revue Experimental Cell Research Année : 2009

KCa2.3 channel-dependent hyperpolarization increases melanoma cell motility.

Résumé

Cell migration and invasion are required for tumour cells to spread from the primary tumour bed so as to form secondary tumours at distant sites. We report evidence of an unusual expression of KCa2.3 (SK3) protein in melanoma cell lines but not in normal melanocytes. Knockdown of the KCa2.3 channel led to plasma membrane depolarization, decreased 2D and 3D cell motility. Conversely, enforced production of KCa2.3 protein in KCa2.3 non-expressing cells led to the plasma membrane becoming hyperpolarized, and enhanced cell motility. In contrast, KCa3.1 channels had no effect on cell motility despite an active role in regulating membrane potential. Our data also suggest that membrane hyperpolarization increases melanoma cell motility and that this occurs through the KCa2.3 channel. Our findings reveal a previously unknown function of the KCa2.3 channel, and suggest that the KCa2.3 channel might be the only member of the Ca(2+)-activated K(+) channel family involved in melanoma cell motility pathways.

Domaines

Cancer

Dates et versions

inserm-00662365 , version 1 (23-01-2012)

Identifiants

Citer

Aurélie Chantôme, Alban Girault, Marie Potier-Cartereau, Christine Collin, Pascal Vaudin, et al.. KCa2.3 channel-dependent hyperpolarization increases melanoma cell motility.. Experimental Cell Research, 2009, 315 (20), pp.3620-30. ⟨10.1016/j.yexcr.2009.07.021⟩. ⟨inserm-00662365⟩
205 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More