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Kca3.1-Related Cellular Signalling Involved in Cancer Proliferation.
Cellular Physiology and Biochemistry 2024 March 17
Anomalous expression of potassium channels in cancer tissues is associated with several cancer hallmarks that support deregulated proliferation and tumor progression. Ion channels seem to influence cell proliferation; however, the crucial molecular mechanisms involved remain elusive. Some results show how extracellular mitogenic signals modulate ion channel activity through intracellular secondary messengers. It is relevant because we are beginning to understand how potassium channels can affect the proliferative capacity of cells, either in normal mitogen-dependent proliferation or in mitogen-unresponsive proliferation. Calciumdependent potassium channels have been implicated in cell cycle signaling in many cancerous cell lines. In particular, the so-called intermediate conductance KCa3.1 (IKCa) is reported to play a significant role in uncontrolled cell cycle signaling, among other malignant processes driven by cancer hallmarks. In addition to these features, this channel can be subjected to specific pharmacological regulation, making it a promising cornerstone for understanding the signaling behavior of several types of cancer and as a target for chemotherapeutic approaches. This review is dedicated to the connection of KCa3.1 activity, in canonical and non-canonical ways, to the cell cycle signaling, including the cooperation with calcium channels to generate calcium signals and its role as a mediator of proliferative signals.
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