Proanthocyanidin derived from the leaves of Vaccinium virgatum suppresses platelet-derived growth factor-induced proliferation of the human hepatic stellate cell line LI90

被引:28
作者
Takami, Yoichiro [1 ,2 ]
Uto, Hirofumi [1 ]
Takeshita, Masahiko [3 ]
Kai, Hisahiro [2 ,4 ]
Akamatsu, Ena [2 ]
Moriuchi, Akihiro [1 ]
Hasegawa, Susumu [1 ]
Oketani, Makoto [1 ]
Ido, Akio [1 ]
Kataoka, Hiroaki [5 ]
Tsubouchi, Hirohito [1 ]
机构
[1] Kagoshima Univ, Grad Sch Med & Dent Sci, Kagoshima 8908520, Japan
[2] Miyazaki Prefectural Ind Support Fdn, Miyazaki, Japan
[3] Minami Nippon Dairy, Div Res, Miyazaki, Japan
[4] Kyushu Univ Hlth & Welf, Fac Hygien Chem, Sch Pharmaceut Sci, Miyazaki, Japan
[5] Miyazaki Univ, Sect Oncopathol & Regenerat Biol, Fac Med, Miyazaki, Japan
基金
日本科学技术振兴机构;
关键词
Akt; extracellular signal-regulated kinase; hepatic stellate cell; platelet-derived growth factor-beta; platelet-derived growth factor; proanthocyanidin; GREEN-TEA POLYPHENOL; UP-REGULATION; IN-VITRO; RECEPTOR; EPIGALLOCATECHIN-3-GALLATE; PROCYANIDINS; INHIBITION; ACTIVATION; INDUCTION; EXTRACT;
D O I
10.1111/j.1872-034X.2009.00589.x
中图分类号
R57 [消化系及腹部疾病];
学科分类号
100201 [内科学];
摘要
Aim: Hepatic stellate cell (HSC) proliferation plays a pivotal role in liver fibrogenesis, and agents that suppress HSC activation, including platelet-derived growth factor (PDGF)-induced HSC proliferation, are good candidates for antifibrogenic therapies. In this report, we use the LI90 HSC line to elucidate the antifibrogenic effects of proanthocyanidin derived from the leaves of Vaccinium virgatum. Methods: Proanthocyanidin (PAC) was extracted from the leaves of blueberry V. virgatum (BB-PAC), grape seeds (GS-PAC) and Croton lechleri (CL-PAC). These extracts were examined for their effects on PDGF-BB-induced LI90 cell proliferation and DNA synthesis. Extracellular signal-regulated kinase (ERK) and Akt phosphorylation and PDGF receptor-beta (PDGFR-beta) expression were evaluated by western blot analysis. Results: BB-PAC potently suppressed PDGF-BB-induced proliferation and DNA synthesis of LI90 cells. BB-PAC also suppressed PDGF-BB-induced DNA synthesis in primary cultured rat HSC. Moreover, GS-PAC and CL-PAC suppressed PDGF-BB-induced DNA synthesis in LI90 cells. In contrast, the monomeric PAC catechin and epicatechin and dimeric PAC procyanidin B2 only slightly suppressed PDGF-BB-induced DNA synthesis. Western blot analysis showed that BB-PAC completely or partially inhibited PDGF-BB-induced ERK and Akt phosphorylation, respectively. In addition, BB-PAC partially inhibited the PDGF-BB-induced degradation of PDGFR-beta. Conclusion: Our results suggest that BB-PAC suppresses activated HSC by inhibiting the PDGF signaling pathway. In addition, these results provide novel findings that may facilitate the development of antifibrogenic agents.
引用
收藏
页码:337 / 345
页数:9
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