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Yeast Luminometric and Xenopus Oocyte Electrophysiological Examinations of the Molecular Mechanosensitivity of TRPV4
Published on: December 31, 2013
TRPM4 regulates calcium oscillations after T cell activation.
Pierre Launay1, Henrique Cheng, Subhashini Srivatsan
1Department of Pathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA.
Science (New York, N.Y.)
|November 20, 2004
Summary
Inhibiting TRPM4 channels in T cells alters calcium signaling, transforming oscillatory patterns into sustained elevations. This modulation boosts interleukin-2 production, highlighting TRPM4
Area of Science:
- Immunology
- Cellular Physiology
- Ion Channel Function
Background:
- TRPM4 is a calcium-activated nonselective cation channel.
- Its role in calcium signaling and cellular responses remains unclear.
- TRPM4 mediates membrane depolarization.
Purpose of the Study:
- To investigate the functional importance of TRPM4 in T cell calcium (Ca2+) signaling.
- To determine the effect of TRPM4 inhibition on receptor-mediated Ca2+ mobilization and cytokine production.
Main Methods:
- Molecular inhibition of endogenous TRPM4 in T lymphocytes.
- Measurement of TRPM4 currents.
- Analysis of intracellular Ca2+ concentration ([Ca2+]i) oscillations.
- Assessment of interleukin-2 production.
Main Results:
- TRPM4 inhibition suppressed TRPM4 currents in T cells.
- Receptor-mediated Ca2+ mobilization was profoundly influenced.
- Agonist-mediated [Ca2+]i oscillations shifted to a sustained elevation.
- Interleukin-2 production was enhanced.
Conclusions:
- TRPM4-mediated depolarization modulates Ca2+ oscillations in T cells.
- Altered Ca2+ influx due to TRPM4 activity impacts downstream cytokine production.
- TRPM4 plays a significant role in T cell activation and immune response.
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