RT info:eu-repo/semantics/article
T1 Kv1.3 channels modulate human vascular smooth muscle cells proliferation independently of mTOR signaling pathway
A1 Cidad Velasco, María del Pilar
A1 Miguel-Velado, Eduardo
A1 Ruiz-McDavitt, Christian
A1 Alonso Alonso, Esperanza
A1 Jiménez-Pérez, Laura
A1 Asuaje, Agustín
A1 Carmona, Yamila
A1 García-Arribas, Daniel
A1 López Díaz, Javier
A1 Marroquín, Yngrid
A1 Fernández Gutiérrez, María Mirella
A1 Roqué, Mercé
A1 Pérez García, María Teresa
A1 López López, José Ramón
AB Phenotypic modulation (PM) of vascular smooth muscle cells (VSMCs) is central to the process of intimal hyperplasia which constitutes a common pathological lesion in occlusive vascular diseases. Changes in the functional expression of Kv1.5 and Kv1.3 currents upon PM in mice VSMCs have been found to contribute to cell migration and proliferation. Using human VSMCs from vessels in which unwanted remodeling is a relevant clinical complication, we explored the contribution of the Kv1.5 to Kv1.3 switch to PM. Changes in the expression and the functional contribution of Kv1.3 and Kv1.5 channels were studied in contractile and proliferating VSMCs obtained from human donors. Both a Kv1.5 to Kv1.3 switch upon PM and an anti-proliferative effect of Kv1.3 blockers on PDGF-induced proliferation were observed in all vascular beds studied. When investigating the signaling pathways modulated by the blockade of Kv1.3 channels, we found that anti-proliferative effects of Kv1.3 blockers on human coronary artery VSMCs were occluded by selective inhibition of MEK/ERK and PLCγ signaling pathways, but were unaffected upon blockade of PI3K/mTOR pathway. The temporal course of the anti-proliferative effects of Kv1.3 blockers indicates that they have a role in the late signaling events essential for the mitogenic response to growth factors. These findings establish the involvement of Kv1.3 channels in the PM of human VSMCs. Moreover, as current therapies to prevent restenosis rely on mTOR blockers, our results provide the basis for the development of novel, more specific therapies.
SN 0031-6768
YR 2014
FD 2014
LK https://uvadoc.uva.es/handle/10324/65881
UL https://uvadoc.uva.es/handle/10324/65881
LA spa
NO Pflugers Arch . 2015 Aug;467(8):1711-22. doi: 10.1007/s00424-014-1607-y. Epub 2014 Sep 12.
DS UVaDOC
RD 17-jul-2024