Abstract:
:The advanced glycation end‑product (AGE)‑receptor for AGE (RAGE) axis induces transforming growth factor‑β (TGF‑β) expression, cell hypertrophy and increases extracellular matrices that are indicated in the pathogenesis of diabetic nephropathy (DN). RAGE binds to numerous ligands besides AGE, including S100B. In the present study, the roles of S100B in high glucose‑induced p21WAF1, extracellular matrices, TGF‑βl and cell hypertrophy in mouse mesangial (MES13) cells were investigated. High glucose (30 mM) time‑dependently (24‑72 h) induced S100B expression. High glucose and exogenous S100B (1 µM) time‑dependently increased p21WAF1 gene transcription and protein expression, increased type IV collagen and fibronectin protein expression, and TGF‑β gene transcription and bioactivity. Exogenous S100B also time‑dependently activated the extracellular regulated kinases (ERK1/2), p38 kinase and c‑Jun N‑terminal kinase (JNK) signaling pathways. Exogenous S100B‑induced TGF‑β gene transcription and bioactivity were attenuated by SB203580 (p38 kinase inhibitor) and PD98059 (ERK1/2 inhibitor). Finally, the knockdown of S100B by small interfering RNA (siRNA) attenuated high glucose‑induced TGF‑β gene transcription and bioactivity, type IV collagen and fibronectin protein expression and p21WAF1 protein expression. Thus, S100B induced TGF‑β via the ERK1/2 and p38 kinase pathways in mesangial cells. Additionally, high glucose‑induced pro‑fibrotic genes (TGF‑β, type IV collagen and fibronectin) and cell hypertrophy‑related p21WAF1 are dependent on S100B.
journal_name
Int J Mol Medjournal_title
International journal of molecular medicineauthors
Chuang CT,Guh JY,Lu CY,Chen HC,Chuang LYdoi
10.3892/ijmm.2014.2024subject
Has Abstractpub_date
2015-02-01 00:00:00pages
546-52issue
2eissn
1107-3756issn
1791-244Xjournal_volume
35pub_type
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