title: Effects of ligustrazine on ureteral obstruction-induced renal tubulointerstitial fibrosis.
abstract: Ligustrazine (LIG) is a purified and chemically identified component of the Chinese herb Ligusticum wallichii Franchat. It is a potent blocker of vasoconstriction and has strong scavenger of oxygen free radicals. We investigated the effect of LIG on renal tubulointerstitial fibrosis using a rat model of unilateral ureteral obstruction. Ligustrazine treatment significantly reduced the scores of interstitial collagen deposition, amounts of hydroxyproline, the density of myofibroblasts and macrophages, and amounts of transforming growth factor-β1 (TGF-β1) and connective tissue growth factor (CTGF) compared with their level in a saline-treated control group. Using quantitative polymerase chain reaction we found that LIG treatment significantly reduced the mRNA expression of TGF-β1, CTGF, monocyte chemoattractant protein-1 and osteopontin. Moreover, the mRNA expression of hepatocyte growth factor and bone morphogenetic protein-7 were significantly increased by LIG. In vitro, LIG inhibited the TGF-β1-induced loss of cytokeratin-18 expression and de novo increase of the expression of α-smooth muscle actin of HK-2 cells in a dose-dependent manner, which suggested that LIG could restrain the process of epithelial-myofibroblast transition of tubular epithelial cells. This study indicates that LIG can attenuate renal tubulointerstitial fibrosis. It might be useful as a potential candidate in the treatment of chronic renal diseases.
authors: Department of Organ Transplant, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
authors: Xiao-peng
authors: XP
authors: Yuan
authors: Long-shan
authors: LS
authors: Liu
authors: Qian
authors: Q
authors: Fu
authors: Chang-xi
authors: CX
authors: Wang
mesh_terms: D000199:Actins / Q000378:metabolism; D000818:Animals; D055419:Bone Morphogenetic Protein 7 / Q000235:genetics; D002460:Cell Line; D003094:Collagen / Q000378:metabolism; D055513:Connective Tissue Growth Factor / Q000235:genetics / Q000378:metabolism; D016207:Cytokines / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D058750:Epithelial-Mesenchymal Transition / Q000187:drug effects; D005355:Fibrosis / Q000209:etiology / Q000473:pathology / Q000517:prevention & control; D006801:Humans; D006909:Hydroxyproline / Q000378:metabolism; D053538:Keratin-18 / Q000235:genetics; D007684:Kidney Tubules / Q000187:drug effects / Q000473:pathology*; D030004:Ligusticum / Q000737:chemistry*; D008264:Macrophages / Q000187:drug effects; D008297:Male; D023421:Models, Animal; D058628:Myofibroblasts / Q000187:drug effects; D011719:Pyrazines / Q000494:pharmacology*; D012333:RNA, Messenger / Q000235:genetics; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D014517:Ureteral Obstruction / Q000150:complications* / Q000473:pathology; D014665:Vasodilator Agents / Q000494:pharmacology*
chemical_list: D000199:Actins; C525821:Bmp7 protein, rat; D055419:Bone Morphogenetic Protein 7; D016207:Cytokines; D053538:Keratin-18; D011719:Pyrazines; D012333:RNA, Messenger; D014665:Vasodilator Agents; D055513:Connective Tissue Growth Factor; D003094:Collagen; D006909:Hydroxyproline; C017953:tetramethylpyrazine