TRPV4 helps Piezo1 put the squeeze on pancreatic acinar cells

J Clin Invest. 2020 May 1;130(5):2199-2201. doi: 10.1172/JCI136525.

Abstract

Alterations in calcium signaling in pancreatic acinar cells can result in pancreatitis. Although pressure changes in the pancreas can elevate cytosolic calcium (Ca2+) levels, it is not known how transient pressure-activated elevations in calcium can cause prolonged calcium changes and consequent pancreatitis. In this issue of the JCI, Swain et al. describe roles for the mechanically activated plasma membrane calcium channels Piezo1 and transient receptor potential vanilloid subfamily 4 (TRPV4) in acinar cells. The authors used genetic deletion models and cell culture systems to investigate calcium signaling. Notably, activation of the Piezo1-dependent TRPV4 pathway was independent of the cholecystokinin (CCK) stimulation pathway. These results elegantly resolve an apparent discrepancy in calcium signaling and the pathogenesis of pancreatitis in pancreatic acinar cells.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Comment

MeSH terms

  • Acinar Cells / metabolism
  • Calcium / metabolism
  • Cholecystokinin / genetics
  • Cholecystokinin / metabolism
  • Humans
  • Ion Channels
  • Pancreas / metabolism
  • Pancreas, Exocrine* / metabolism
  • Pancreatitis* / genetics
  • TRPV Cation Channels / genetics
  • Transient Receptor Potential Channels*

Substances

  • Ion Channels
  • PIEZO1 protein, human
  • TRPV Cation Channels
  • TRPV4 protein, human
  • Transient Receptor Potential Channels
  • Cholecystokinin
  • Calcium