Key result
2-hydroxyoleic acid decreased cell proliferation and increased Kv10.1 channel currents, acting synergistically with the channel blocker astemizole to reduce proliferation in Kv10.1-expressing cells.
Why the study?
2-hydroxyoleic acid (2OHOA) is a synthetic fatty acid with antitumor properties that alters membrane composition, but whether its antitumoral mechanism involves regulation of Kv10.1 channels was unknown.
Answers are grounded in this paper and cite their sources.
2-hydroxyoleic acid exhibits antitumoral effects by modulating the voltage-dependent gating of the oncogenic Kv10.1 potassium channel, acting synergistically with pore blockers like astemizole.
Background 2-hydroxyoleic acid (2OHOA) is a synthetic fatty acid with antitumor properties that alters membrane composition and structure, which in turn influences the functioning of membrane proteins and cell signaling. In this study, we propose a novel antitumoral mechanism of 2OHOA accomplished through the regulation of Kv10.1 channels. We evaluated the effects of 2OHOA on Kv10.1 channels expressed in HEK-293 cells by using electrophysiological techniques and a cell proliferation assay. Results 2OHOA increased Kv10.1 channel currents in a voltage-dependent manner, shifted its conductance-voltage relationship towards negative potentials, and accelerated its activation kinetics. Moreover, 2OHOA reduced proliferation of cells that exogenously (HEK-293) and endogenously (MCF-7) expressed Kv10.1 channels. It is worth noting that the antiproliferative effect of 2OHOA was maintained in HEK-293 cells expressing a non-conducting mutant of Kv10.1 channel (Kv10.1-F456A), while it did not affect HEK-293 cells not expressing Kv10.1 channels, suggesting that 2OHOA interferes with a non-conducting function of Kv10.1 channels involved in cell proliferation. Finally, we found that 2OHOA can act synergistically with astemizole, a Kv10.1 channel blocker, to decrease cell proliferation more efficiently. Conclusion Our data suggest that 2OHOA decreases cell proliferation, at least in part, by regulating Kv10.1 channels.
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Morán‐Zendejas et al. (2023) studied Cancer (in vitro cell lines). 2-hydroxyoleic acid (2OHOA) vs. Untreated cells was evaluated on Cell proliferation and Kv10.1 channel currents (p=<0.05). 2-hydroxyoleic acid decreased cell proliferation and increased Kv10.1 channel currents, acting synergistically with the channel blocker astemizole to reduce proliferation in Kv10.1-expressing cells.
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