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Calcium ions are essential to contract smooth muscle cells in blood vessels. They enter these cells through voltage-dependent calcium channels, specifically L-type calcium channels in the cell membrane. These L-type calcium channels are integral to the excitation-contraction coupling process in smooth muscle. When a stimulus is received by smooth muscle cells, their membrane depolarizes. This alteration in membrane potential instigates the opening of L-type calcium channels. As a result,...
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Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
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Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
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A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
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Updated: Aug 29, 2025

Cell-based Calcium Assay for Medium to High Throughput Screening of TRP Channel Functions using FlexStation 3
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T-Type Calcium Channels: A Mixed Blessing.

Dario Melgari1, Anthony Frosio1, Serena Calamaio1

  • 1Institute of Molecular and Translational Cardiology, IRCCS Policlinico San Donato, Piazza Malan 2, 20097 San Donato Milanese, Italy.

International Journal of Molecular Sciences
|September 9, 2022
PubMed
Summary
This summary is machine-generated.

T-type calcium channels are crucial in cancer progression and chemotherapy side effects. Targeting these channels offers therapeutic potential but requires careful consideration due to cardiotoxicity and pain induction.

Keywords:
T-type Ca2+ channelT-type calcium channel blockerbortezomibcancer therapycardiotoxicitycarfilzomibmibefradilperipheral neuropathy

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Area of Science:

  • Biochemistry
  • Oncology
  • Pharmacology

Background:

  • T-type calcium channels regulate essential functions in excitable and non-excitable cells.
  • Their expression is a significant prognostic factor in various cancers.
  • These channels are implicated in the side effects of chemotherapy, including cardiotoxicity and neuropathic pain.

Purpose of the Study:

  • To review the multifaceted role of T-type calcium channels in cancer.
  • To discuss their involvement in chemotherapy-induced side effects.
  • To highlight the implications for therapeutic strategies and patient safety.

Main Methods:

  • Literature review of studies on T-type calcium channels in cancer.
  • Analysis of research on chemotherapy agents affecting T-type calcium channels.
  • Examination of data on cardiotoxicity and pain associated with channel modulation.

Main Results:

  • T-type calcium channels are frequently overexpressed in cancer cells, serving as a potential therapeutic target.
  • Non-selective drugs targeting these channels can lead to significant cardiotoxicity.
  • Certain anticancer drugs enhance T-type calcium channel expression, increasing neuronal excitability and causing pain.

Conclusions:

  • T-type calcium channels are critical regulators in cancer biology and chemotherapy response.
  • Selective targeting of T-type calcium channels is necessary to mitigate side effects like cardiotoxicity and pain.
  • Further research is needed to develop safer and more effective therapeutic strategies involving these channels.