Schisandrin B suppresses TGF beta 1-induced stress fiber formation by inhibiting myosin light chain phosphorylation
- Authors
- Chun, JN[Chun, Jung Nyeo]; Kim, SY[Kim, Sang-Yeob]; Park, EJ[Park, Eun-Jung]; Kwon, EJ[Kwon, Eun Jung]; Bae, DJ[Bae, Dong-Jun]; Kim, IS[Kim, In-San]; Kim, HK[Kim, Hye Kyung]; Park, JK[Park, Jong Kwan]; Lee, SW[Lee, Sung Won]; Park, HH[Park, Hyun Ho]; So, I[So, Insuk]; Jeon, JH[Jeon, Ju-Hong]
- Issue Date
- 14-Mar-2014
- Publisher
- ELSEVIER IRELAND LTD
- Citation
- JOURNAL OF ETHNOPHARMACOLOGY, v.152, no.2, pp.364 - 371
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ETHNOPHARMACOLOGY
- Volume
- 152
- Number
- 2
- Start Page
- 364
- End Page
- 371
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/53665
- DOI
- 10.1016/j.jep.2014.01.024
- ISSN
- 0378-8741
- Abstract
- Ethnopharmacological relevance: Schisandra chinensis fruit extract (SCE) has been used as a traditional oriental medicine for treating vascular diseases. However, the pharmacologic effects and mechanisms of SCE on vascular fibrosis are still largely unknown. Transforming growth factor beta 1 (TGF beta 1)-mediated cellular changes are closely associated with the pathogenesis of vascular fibrotic diseases. Particularly, TGF beta 1 induces actin stress fiber formation that is a crucial mechanism underlying vascular smooth muscle cell (VSMC) migration in response to vascular injury. In this study, we investigated the effect of SCE and its active ingredients on TGF beta 1-induced stress fiber assembly in A7r5 VSMCs. Materials and methods: To investigate pharmacological actions of SCE and its ingredients on TGF beta 1-treated VSMCs, we have employed molecular and cell biological technologies, such as confocal microscopy, fluorescence resonance energy transfer, western blotting, and radiometric enzyme analyses. Results: We found that SCE inhibited TGF beta 1-induced stress fiber formation and cell migration. Schisandrin B (SchB) showed the most prominent effect among the active ingredients of SCE tested. SchB reduced TGF beta 1-mediated phosphorylation of myosin light chain, and this effect was independent of RhoA/Rho-associated kinase pathway. Fluorescence resonance energy transfer and radiometric enzyme assays confirmed that SchB inhibited myosin light chain kinase activity. We also showed that SchB decreased TGF beta 1-mediated induction of alpha-smooth muscle actin by inhibiting Smad signaling. Conclusions: The present study demonstrates that SCE and its active ingredient SchB suppressed TGF beta 1-induced stress fiber formation at the molecular level. Therefore, our findings may help future investigations to develop multi-targeted therapeutic strategies that attenuate VSMC migration and vascular fibrosis. (C) 2014 Elsevier Ireland Ltd. All rights reserved.
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Collections - Medicine > Department of Medicine > 1. Journal Articles
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