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Related Experiment Videos

Recent developments in non-excitable cell calcium entry.

A C Elliott1

  • 1School of Biological Sciences, University of Manchester, Manchester, UK. acelliot@mail1.mcc.ac.uk

Cell Calcium
|July 7, 2001
PubMed
Summary
This summary is machine-generated.

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Cellular calcium influx is vital but poorly understood in non-excitable cells. Recent research debates mechanisms controlling calcium entry, including the role of Transient Receptor Potential (TRP) channels.

Area of Science:

  • Cellular Biology
  • Physiology
  • Biochemistry

Background:

  • Calcium influx into cells regulates cellular activity, but mechanisms in non-excitable cells remain unclear.
  • Depletion-activated calcium entry, also known as capacitative calcium entry, is a key area of ongoing research and debate.
  • The precise regulation of calcium entry following cell surface receptor stimulation is not fully understood.

Purpose of the Study:

  • To summarize recent developments in understanding calcium influx regulation in non-excitable cells.
  • To highlight current debates and critical unsolved questions in the field of calcium entry.
  • To discuss the potential roles of conformational coupling, soluble messengers, and Transient Receptor Potential (TRP) channels.

Main Methods:

  • Review of recent scientific literature (last 2 years).

Related Experiment Videos

  • Analysis of evidence supporting different theories of calcium entry regulation.
  • Discussion of ongoing debates regarding calcium channel identity and activation thresholds.

    • Main Results:

    • New impetus for the 'conformational coupling' theory of calcium entry.
    • Conflicting evidence regarding the necessity of soluble messengers between the ER and plasma membrane.
    • Ongoing debate about whether a threshold of intracellular calcium concentration is required for calcium entry activation.
    • Focus on Transient Receptor Potential (TRP) channels as potential candidates for depletion-operated calcium channels.

    Conclusions:

    • The precise mechanisms controlling calcium influx in non-excitable cells are still debated.
    • The identity and function of depletion-operated calcium channels, particularly TRP channels, require further investigation.
    • Alternative calcium entry pathways may also contribute to agonist-evoked calcium influx.