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2017 ; 12
(7
): e0180393
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Dipeptidyl peptidase-4 inhibitor gemigliptin protects against vascular
calcification in an experimental chronic kidney disease and vascular smooth
muscle cells
#MMPMID28686724
Choi SY
; Ryu HM
; Oh EJ
; Choi JY
; Cho JH
; Kim CD
; Kim YL
; Park SH
PLoS One
2017[]; 12
(7
): e0180393
PMID28686724
show ga
Although dipeptidyl peptidase-4 inhibitors, a class of antidiabetic drugs, have
various pleiotropic effects, it remains undetermined whether gemigliptin has a
beneficial effect on vascular calcification. Therefore, this study was performed
to evaluate the effect of gemigliptin on vascular calcification in a rat model of
adenine-induced chronic kidney disease and in cultured vascular smooth muscle
cells. Gemigliptin attenuated calcification of abdominal aorta and expression of
RUNX2 in adenine-induced chronic kidney disease rats. In cultured vascular smooth
muscle cells, phosphate-induced increase in calcium content was reduced by
gemigliptin. Gemigliptin reduced phosphate-induced PiT-1 mRNA expression,
reactive oxygen species generation, and NADPH oxidase mRNA expression (p22phox
and NOX4). The reduction of oxidative stress by gemigliptin was associated with
the downregulation of phospho-PI3K/AKT expression. High phosphate increased the
expression of frizzled-3 (FDZ3) and decreased the expression of dickkopf-related
protein-1 (DKK-1) in the Wnt pathway. These changes were attenuated by
gemigliptin treatment. Gemigliptin restored the decreased expression of vascular
smooth muscle cells markers (?-SMA and SM22?) and increased expression of
osteogenic makers (CBFA1, OSX, E11, and SOST) induced by phosphate. In
conclusion, gemigliptin attenuated vascular calcification and osteogenic
trans-differentiation in vascular smooth muscle cells via multiple steps
including downregulation of PiT-1 expression and suppression of reactive oxygen
species generation, phospho-PI3K/AKT, and the Wnt signaling pathway.