Cited by 392Ion Channels and ReceptorsPancreatic function and diabetesCalcium signaling and nucleotide metabolism

Transient receptor potential M3 channels are ionotropic steroid receptors in pancreatic β cells

Wagner, Thomas F.J., Loch, Sabine, Lambert, Sachar, Straub, Isabelle, Mannebach, Stefanie, Mathar, Ilka, Düfer, Martina, Lis, Annette +3 more·2008·Nature Cell Biology

Abstract

Transient receptor potential (TRP) cation channels are renowned for their ability to sense diverse chemical stimuli. Still, for many members of this large and heterogeneous protein family it is unclear how their activity is regulated and whether they are influenced by endogenous substances. On the other hand, steroidal compounds are increasingly recognized to have rapid effects on membrane surface receptors that often have not been identified at the molecular level. We show here that TRPM3, a divalent-permeable cation channel, is rapidly and reversibly activated by extracellular pregnenolone sulphate, a neuroactive steroid. We show that pregnenolone sulphate activates endogenous TRPM3 channels in insulin-producing beta cells. Application of pregnenolone sulphate led to a rapid calcium influx and enhanced insulin secretion from pancreatic islets. Our results establish that TRPM3 is an essential component of an ionotropic steroid receptor enabling unanticipated crosstalk between steroidal and insulin-signalling endocrine systems.

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Crossref · 10.1038/ncb1801

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Authors
Wagner, T. F. J., Loch, S., Lambert, S., Straub, I., Mannebach, S., Mathar, I., Düfer, M., Lis, A., Flockerzi, V., Philipp, S. E., & Oberwinkler, J.
Affiliations
  • Saarland University (DE)
  • University of Tübingen (DE)
Corresponding author
Oberwinkler, Johannes
Venue
Nature Cell Biology
Published
2008-11-02
Volume
10
Issue
12
Pages
1421-1430
ISSN
  • 1465-7392 (ISSN-L)
  • 1476-4679
OpenAlex
W2016048441
Cited by
392
References
50
Citations by year
2026: 14 · 2025: 23 · 2024: 21 · 2023: 17 · 2022: 24 · 2021: 27 · 2020: 25 · 2019: 21 · 2018: 20 · 2017: 27 · 2016: 11 · 2015: 26 · 2014: 39 · 2013: 21 · 2012: 22
FWCI
8.59
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
TRPM3, pregnenolone sulfate, neurosteroids, pancreatic beta cells, insulin secretion, calcium influx, pancreatic islets
MeSH terms
Insulin Secretion, Animals, Cations, Monovalent, Cell Line, Extracellular Space, Humans, Insulin, Nifedipine, Permeability, Pregnenolone, Receptors, Steroid, Down-Regulation, Ion Channel Gating, Calcium Signaling, RNA, Small Interfering, TRPM Cation Channels, Insulin-Secreting Cells, Mice, Rats, Biophysical Phenomena

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