RESUMO
Aim To explore the role of transcription factor F0XM1 in collagen synthesis in MRC-5 cells in-duced by high glucose.Methods I ▪ The optimal time and concentration of the hyperglycemia model in MRC-5 cells were explored by CCK8: the time gradi¬ents: 6,12,24,48,72 h; the concentration gradients: 5.5,15 ,30,45 mmol • L 1 , and 30 mmol • L 1 man- nitol was used to be the hypertonic control group.(2) Hie effect of collagen synthesis in MRC-5 cells induced by high glucose was detected: the cells were divided into normal control group, hypertonic control group (30 mmol • L 1 mannitol) and high glucose (30 mmol • L 1 ) group.WB and qPCR assays were used to de¬tect the expression of conllagen synthesis factors ( Fn, COL 1, COL m, a-SMA, MMP9, TIMP1 ) and TGF-p signaling pathway factors (TGF-pi , p-Smad2/ Smad2).(3 The role of FOXMl in promoting collagen synthesis by high glucose was investigated: the cells were divided into normal control group, hypertonic control group (30 mmol • L 1 mannitol) , high glucose ( 30 mmol • L 1 ) group and high glucose (30 mmol • L 1 ) + thiostrepton ( 1 (xmol) group, and the expres¬sions of FOXM1 , collagen synthesis factors were detec¬ted by WB and qPCR assays.Results Mannitol had no significant effect on proliferation of MRC-5 cells, hut their proliferation activity was significantly lower than that of control group when MRC-5 cells were trea¬ted with 30 mmol • L 1 high glucose for 24 h; the ex¬pressions of COL 1 , COL IH , F0XM1 and other fac¬tors were promoted when MRC5 cells were treated with high glucose; the expression of F0XM1 was signifi¬cantly inhibited after the addition of thiostrepton, and the expressions of collagen synthesis factors also de-creased compared with high glucose group, and the a- bove differences were all statistically significant (P < 0.05).Conclusion FOXM1 is a factor related to the increase of collagen synthesis in MRC-5 cells induced by high glucose.