Radix clematidis extract inhibits UVB-induced MMP expression by suppressing the NF-kappaB pathway in human dermal fibroblasts.
Ultraviolet (UV)B irradiation induces the production of matrix metalloproteinases (MMPs), which are responsible for the degradation of collagenous extracellular matrix in connective tissues, causing skin photoaging. Although Radix clematidis is commonly used in Chinese medicine for the treatment of arthralgia, the anti-skin photoaging effects of Radix clematidis have not yet been reported. In the present study, we investigated the inhibitory effects of Radix clematidis extract (RCE) on MMP-1 and -3 expression of human dermal fibroblast cells via various in vitro experiments and elucidated the pathways of inhibition. Western blot analysis and real-time PCR revealed RCE inhibited UVB-induced MMP-1 and -3 expressions in a dose-dependent manner. UVB strongly activated nuclear factor-kappaB (NF-kappaB) activity, which was determined by IkappaBalpha degradation, nuclear localization of p50 and p65 subunit, and NF-kappaB binding activity. However, UVB-induced NF-kappaB activation was completely blocked by RCE pretreatment. These findings suggest that RCE prevents UVB-induced MMP expression through inhibition of NF-kappaB activation. In conclusion, RCE is a potential agent for the prevention and treatment of skin photoaging.
Department of Biochemistry, Institute for Medical Sciences, Chonbuk National University Medical School, Jeonbuk 560-182, Japan.
Young-Rae
YR
Lee
Eun-Mi
EM
Noh
Kang-Beom
KB
Kwon
Yun-Sik
YS
Lee
Jong Phil
JP
Chu
Eun Jib
EJ
Kim
Young-Seok
YS
Park
Byeong-Soo
BS
Kim
Jong-Suk
JS
Kim
D002470:Cell Survival / Q000187:drug effects / Q000528:radiation effects; D002478:Cells, Cultured; D039324:Clematis / Q000737:chemistry*; D019610:Cytoprotection / Q000187:drug effects; D020405:Dermis / Q000187:drug effects* / Q000528:radiation effects; D004305:Dose-Response Relationship, Drug; D015536:Down-Regulation / Q000187:drug effects; D004353:Drug Evaluation, Preclinical; D005347:Fibroblasts / Q000187:drug effects / Q000528:radiation effects; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects / Q000528:radiation effects; D006801:Humans; D020782:Matrix Metalloproteinases / Q000235:genetics*; D016328:NF-kappa B / Q000037:antagonists & inhibitors* / Q000378:metabolism / Q000502:physiology; D010936:Plant Extracts / Q000494:pharmacology*; D015398:Signal Transduction / Q000187:drug effects / Q000528:radiation effects; D014466:Ultraviolet Rays / Q000009:adverse effects
D016328:NF-kappa B; D010936:Plant Extracts; C541813:Radix clematidis extract; D020782:Matrix Metalloproteinases