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Cell volume regulation and swelling-activated chloride channels
Alessandro Sardini1, Joanna S Amey, Karsten Henrich Weylandt
1MRC Clinical Sciences Centre, Imperial College School of Medicine, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK. a.sardini@csc.mrc.ac.uk
Biochimica Et Biophysica Acta
|January 20, 2004
Summary
Animal cells maintain constant volume via regulatory volume decrease (RVD), a process involving ion and water loss. This review focuses on chloride channels, particularly ClC-3, as key players in cell volume regulation.
Area of Science:
- Cell biology
- Physiology
- Molecular biology
Background:
- Cell volume homeostasis is crucial for normal cellular function.
- Animal cells swell when extracellular osmolarity decreases or intracellular osmolytes increase.
- Regulatory volume decrease (RVD) restores cell volume through ion and water efflux.
Purpose of the Study:
- To review the current understanding of chloride conductance in RVD.
- To evaluate candidate proteins responsible for chloride efflux during cell swelling.
- To emphasize the role of ClC-3 in cell volume regulation.
Main Methods:
- Literature review of cell volume regulation mechanisms.
- Analysis of proposed chloride channel candidates for RVD.
- Focus on the ClC family, specifically ClC-3.
Main Results:
- Activation of chloride conductance is a critical step in RVD.
- Several proteins have been implicated as the RVD chloride channel.
- ClC-3 is a recent and prominent candidate for mediating this chloride conductance.
Conclusions:
- Cell volume regulation is a vital homeostatic process.
- Identifying the specific chloride channel in RVD is essential for understanding cell physiology.
- ClC-3 presents a significant focus in ongoing research for cell volume regulation.