The Effects of Rehmannia glutinosa on the Protein Expression Related to the Angiogenesis, Cell Survival and Inflammation

생지황(生地黃)이 혈관신생, 세포생존 및 염증관련 단백질발현에 미치는 영향

  • 김성범 (경원대학교 한의과대학 안이비인후피부과학교실) ;
  • 김경준 (경원대학교 한의과대학 안이비인후피부과학교실)
  • Published : 2006.12.25

Abstract

Objective : Angiogenesis induced by hypoxia and inflammation are an essential process of solid tumors and psoriasis. We researched the HIF-1 ${\alpha}$ (hypoxia inducible factor 1 alpha), VEGF(Vascular Endothelial Growth Factor), survival related PI3K-Akt, and inflammation related COX-2 protein expressions to get the information of the mechanism and effects of Rehmannia glutinosa in HepG2 and HaCaT cell lines. Method : To investigate the roles of the Rehmannia glutinosa extract, we performed MTS assay and western blots using HaCaT cells and HepG2 cells. HaCaT cells and HepG2 cells were treated with $50{\mu}g/ml$ and $100{\mu}g/ml$ Rehmannia glutinosa extracts. After 4hrs, HaCaT cells were treated with IGF-II protein for 24hrs and HepG2 cells were treated with $CoCl_2$. Results : 1. We could ohserve that the reduction of the protein level of HIT-1 ${\alpha}$ induced by IGF-II in HaCaT cells. 2. We Could ohserve that the decreased PI3K-Akt and COX-2 expression level by Rehmannia glutinosa extracts treated in HaCaT cells independently ith ERK1/2. 3. We could observe that the reduction of the protein level of HIF-1 ${\alpha}$ induced by $CoCl_2$ in HepG2 cells. Conclusion : These results suggest that Rehmannia glutinosa extracts contributes to the anti-survival pathway and anti-inflammatory activities. Also, we could assume that Rehmannia glutinosa act as anti-inflanmmatory or anti-hypoxia agents via reduction of COX-2 and HIF-1 ${\alpha}$.

Keywords

Rehmannia glutinosa;Insulin like growth factor-II;HIF-1 ${\alpha}$;p-Akt;COX-2;Angiogenesis;Psoriasis