Role of calcium in adult onset polycystic kidney disease

Murali K. Yanda, Qiangni Liu, Valeriu Cebotaru, William B Guggino, Liudmila Cebotaru

Research output: Contribution to journalArticle

Abstract

Autosomal dominant polycystic kidney disease (ADPKD) is caused by mutations in genes encoding the polycystin (PC) 1 and 2 proteins. The goal of this study was to determine the role of calcium in regulating cyst growth. Stromal interaction molecule 1 (STIM1) protein expression was 15-fold higher in PC1-null proximal tubule cells (PN) than in heterozygote (PH) controls and 2-fold higher in an inducible, PC1 knockout, mouse model of ADPKD compared to a non-cystic match control. IP3 receptor protein expression was also higher in the cystic mice. Knocking down STIM1 with siRNA reduced cyst growth and lowered cAMP levels in PN cells. Fura2 measurements of intracellular Ca2+ showed higher levels of intracellular Ca2+, SOCE and thaspigargin-stimulated ER Ca2+ release in PN vs. PH cells. There was a dramatic reduction in thapsigargin-stimulated release of ER Ca2+ following STIM1 silencing or application of 2-APB, consistent with altered ER Ca2+ movement; the protein expression of the Ca2+-dependent adenylyl cyclases (AC) AC3 and AC6 was up- and down-regulated, respectively. Like STIM1 knockdown, application of the calmodulin inhibitor W7 lowered cAMP levels, further indicating that STIM1 regulates AC3 via Ca2+ We conclude that the high levels of STIM1 in ADPKD cells play a role in supporting cyst growth and promoting high cAMP levels and an increased release of Ca2+ from the ER. Thus, our results provide novel therapeutic targets for treating ADPKD.

LanguageEnglish (US)
Pages140-150
Number of pages11
JournalCellular Signalling
Volume53
DOIs
StatePublished - Jan 1 2019

Fingerprint

Autosomal Dominant Polycystic Kidney
Calcium
Cysts
Proteins
Growth
Inositol 1,4,5-Trisphosphate Receptors
Thapsigargin
Calmodulin
Heterozygote
Adenylyl Cyclases
Knockout Mice
Small Interfering RNA
Stromal Interaction Molecule 1
Mutation
Genes

Keywords

  • Autosomal dominant polycystic kidney disease
  • Calcium
  • cAMP
  • cysts
  • STIM

ASJC Scopus subject areas

  • Cell Biology

Cite this

Role of calcium in adult onset polycystic kidney disease. / Yanda, Murali K.; Liu, Qiangni; Cebotaru, Valeriu; Guggino, William B; Cebotaru, Liudmila.

In: Cellular Signalling, Vol. 53, 01.01.2019, p. 140-150.

Research output: Contribution to journalArticle

Yanda, Murali K. ; Liu, Qiangni ; Cebotaru, Valeriu ; Guggino, William B ; Cebotaru, Liudmila. / Role of calcium in adult onset polycystic kidney disease. In: Cellular Signalling. 2019 ; Vol. 53. pp. 140-150.
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