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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2016 ; 11
(3
): e0151585
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Sodium Glucose Cotransporter 2 (SGLT2) Plays as a Physiological Glucose Sensor
and Regulates Cellular Contractility in Rat Mesangial Cells
#MMPMID26999015
Wakisaka M
; Nagao T
; Yoshinari M
PLoS One
2016[]; 11
(3
): e0151585
PMID26999015
show ga
PURPOSE: Mesangial cells play an important role in regulating glomerular
filtration by altering their cellular tone. We report the presence of a sodium
glucose cotransporter (SGLT) in rat mesangial cells. This study in rat mesangial
cells aimed to evaluate the expression and role of SGLT2. METHODS: The SGLT2
expression in rat mesangial cells was assessed by Western blotting and reverse
transcription-polymerase chain reaction (RT-PCR). Changes in the mesangial cell
surface area at different glucose concentrations and the effects of extracellular
Na+ and Ca2+ and of SGLT and Na+/Ca2+ exchanger (NCX) inhibitors on cellular size
were determined. The cellular sizes and the contractile response were examined
during a 6-day incubation with high glucose with or without phlorizin, an SGLT
inhibitor. RESULTS: Western blotting revealed an SGLT2 band, and RT-PCR analysis
of SGLT2 revealed the predicted 422-bp band in both rat mesangial and renal
proximal tubular epithelial cells. The cell surface area changed according to the
extracellular glucose concentration. The glucose-induced contraction was
abolished by the absence of either extracellular Na+ or Ca2+ and by SGLT and NCX
inhibitors. Under the high glucose condition, the cell size decreased for 2 days
and increased afterwards; these cells did not contract in response to angiotensin
II, and the SGLT inhibitor restored the abolished contraction. CONCLUSIONS: These
data suggest that SGLT2 is expressed in rat mesangial cells, acts as a normal
physiological glucose sensor and regulates cellular contractility in rat
mesangial cells.