Regulation of (pro)renin Receptor Expression by Glucose-induced Mitogen-activated Protein Kinase, Nuclear Factor-kappaB, and Activator Protein-1 Signaling Pathways
Overview
Authors
Affiliations
Renal (pro)renin receptor (PRR) expression is increased in diabetes. The exact mechanisms involved in this process are not well established. We hypothesized that high glucose up-regulates PRR through protein kinase C (PKC)-Raf-ERK and PKC-c-Jun N-terminal kinase (JNK)-c-Jun signaling pathways. Rat mesangial cells exposed to 30 mm d-glucose demonstrated significant increase in PRR mRNA and protein expression, intracellular phosphorylation of Raf-1 (Y340/341), ERK, JNK, nuclear factor-kappaB (NF-kappaB) p65 (S536) and c-Jun (S63). By chromatin immunoprecipitation assay and EMSA, high glucose induced more functional NF-kappaB and activator protein (AP)-1 dimers bound to corresponding cis-regulatory elements in the predicted PRR promoter to up-regulate PRR transcription. Conventional and novel PKC inhibitors Chelerythrine and Rottlerin, Raf-1 inhibitor GW5074, MEK1/2 inhibitor U0126, JNK inhibitor SP600125, NF-kappaB inhibitor Quinazoline, and AP-1 inhibitor Curcumin, respectively, attenuated glucose-induced PRR up-regulation. Chelerythrine and Rottlerin also inhibited glucose-induced phosphorylation of Raf-1 (Y340/341), ERK1/2, JNK, NF-kappaB p65 (S536), and c-Jun (S63). GW5074 and U0126 inhibited the phosphorylation of ERK1/2 and NF-kappaB p65 (S536). SP600125 inhibited phosphorylation of NF-kappaB p65 (S536) and c-Jun (S63). We conclude that high glucose up-regulates the expression of PRR through mechanisms dependent on both PKC-Raf-ERK and PKC-JNK-c-Jun signaling pathways. NF-kappaB and AP-1 are involved in high-glucose-induced PRR up-regulation in rat mesangial cells.
Larenas P, Cardenas P, Aguirre-Delgadillo M, Moris C, Casarini D, Vallotton Z Biol Res. 2024; 57(1):81.
PMID: 39506854 PMC: 11542404. DOI: 10.1186/s40659-024-00560-8.
Xie S, Song S, Liu S, Li Q, Zou W, Ke J J Transl Med. 2024; 22(1):26.
PMID: 38183100 PMC: 10768114. DOI: 10.1186/s12967-023-04846-5.
Gogulamudi V, Arita D, Bourgeois C, Jorgensen J, He J, Wimley W Sci Rep. 2021; 11(1):13815.
PMID: 34226610 PMC: 8257763. DOI: 10.1038/s41598-021-93296-4.
Guerrero A, Visniauskas B, Cardenas P, Figueroa S, Vivanco J, Salinas-Parra N Front Cardiovasc Med. 2021; 8:644797.
PMID: 34179130 PMC: 8220822. DOI: 10.3389/fcvm.2021.644797.
The Complexity of FGF23 Effects on Cardiomyocytes in Normal and Uremic Milieu.
Figurek A, Rroji M, Spasovski G Cells. 2021; 10(5).
PMID: 34065339 PMC: 8161087. DOI: 10.3390/cells10051266.