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Updated: May 31, 2026
05:56
Imaging Initial Ca2+ Microdomains in Primary T Cells
Published on: October 4, 2024
Calcium signalling in T-lymphocytes
V Robert1, E Triffaux, M Savignac
1INSERM U1043, Centre de Physiopathologie de Toulouse Purpan, France.
Biochimie
|June 30, 2011
Summary
Calcium signalling is crucial for T-cell functions. This review highlights the role of voltage-dependent calcium (Ca(v)1) channels, particularly their upregulation in Th2 lymphocytes involved in allergic diseases.
Area of Science:
- Immunology
- Cell Biology
- Physiology
Background:
- Calcium signalling is vital for T-cell receptor (TCR) engagement and subsequent cellular activities.
- Th2 lymphocytes, implicated in allergic diseases, produce key interleukins (IL-4, IL-5, IL-13).
- Intracellular calcium release is initiated by inositol trisphosphate binding to its receptor, while STIM proteins sense store depletion and activate ORAI channels.
Purpose of the Study:
- To review the diversity of calcium channels involved in T-cell calcium homeostasis.
- To discuss the role and gating mechanisms of voltage-dependent calcium (Ca(v)1) channels in non-excitable T-cells.
- To explore the selective upregulation of Ca(v)1 channels in Th2 lymphocytes.
Main Methods:
- Literature review focusing on calcium signalling pathways in T-cells.
- Analysis of studies investigating calcium channel expression and function.
- Discussion of the interplay between different calcium channels in effector T-cell subsets.
Main Results:
- STIM and ORAI proteins are key players in TCR-induced calcium influx.
- Voltage-dependent calcium (Ca(v)1) channels contribute to intracellular calcium rise in T-cells.
- Ca(v)1 channel expression is specifically increased in Th2 lymphocytes.
Conclusions:
- A variety of calcium channels contribute to calcium homeostasis in different T-cell subsets.
- The interactions among these channels dictate diverse calcium responses essential for effector T-cell functions.
- Understanding Ca(v)1 channel regulation in Th2 cells may offer insights into allergic disease mechanisms.
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