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KMID : 0043320100330010151
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Archives of Pharmacal Research
2010 Volume.33 No. 1 p.151 ~ p.157
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Effect of Protopanaxadiol Derivatives in High Glucose-induced Fibronectin Expression in Primary Cultured Rat Mesangial Cells: Role of Mitogen-Activated Protein Kinases and Akt
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Park Soo-Hyun
Han Ho-Jae
Kim Jong-Choon
Bae Chun-Sik
Kim Dong-Il
Moon Jae-Hak
Yoon Kyung-Chul
Park Min-Jung
Lim Seul-Ki
Lim Jae-Cheong
Kim Kye-Yeop
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Abstract
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A lot of anti-diabetic agents using natural plants have been extensively studied. Ginsenosides are known to be used as a remedy for diabetes in Asian countries and American Societies. Diabetic nephropathy is a major complication of diabetes mellitus. Extracellular matrix in mesangial cells is mainly composed of fibronectin and the increase of fibronectin is a hallmark of diabetic nephropathy. Protopenaxadiol (PPD) is a major component of total ginseng. Thus, we examined the regulatory mechanism of PPD derivatives-induced preventive effect of fibronectin expression in mesangial cells cultivated under diabetic condition. In present study, ginsenoside Rb1 prevented the high glucose-induced increase of fibronectin expression in mesangial cells. Ginsenoside Rb2 and Rg3 also mildly inhibited it. However, ginsenoside Rc and Rd did not prevent the high glucose-induced increase of fibronectin expression in mesangial cells. In addition, ginsenoside Rb1 prevented high glucose-induced phosphorylation of p44/42 mitogen activated protein kinase (MAPK), p38 MAPK, JNK/SAPK, and Akt. These results suggest that ginsenoside Rb1 is the most powerful component of PPD derivatives. In conclusion, ginsenoside Rb1 prevented high glucose-induced increase of fibronectin expression via the inhibition of MAPK-Akt signaling cascade.
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KEYWORD
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Ginsenosides, Diabetic nephropathy, Fibronectin, Akt, Mitogen activated protein kinases
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