Hair Growth Promotion Activity and Its Mechanism of Polygonum multiflorum.

Evid Based Complement Alternat Med 2015 30;2015:517901. Epub 2015 Jul 30.

Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan 650500, China.

Polygonum multiflorum Radix (PMR) has long history in hair growth promotion and hair coloring in clinical applications. However, several crucial problems in its clinic usage and mechanisms are still unsolved or lack scientific evidences. In this research, C57BL/6J mice were used to investigate hair growth promotion activity and possible mechanism of PMR and Polygonum multiflorum Radix Preparata (PMRP). Hair growth promotion activities were investigated by hair length, hair covered skin ratio, the number of follicles, and hair color. Regulation effects of several cytokines involved in the hair growth procedure were tested, such as fibroblast growth factor (FGF-7), Sonic Hedgehog (SHH), β-catenin, insulin-like growth factor-1 (IGF-1), and hepatocyte growth factor (HGF). Oral PMR groups had higher hair covered skin ratio (100 ± 0.00%) than oral PMRP groups (48%~88%). However, topical usage of PMRP had about 90% hair covered skin ratio. Both oral administration of PMR and topically given PMRP showed hair growth promotion activities. PMR was considered to be more suitable for oral administration, while PMRP showed greater effects in external use. The hair growth promotion effect of oral PMR was most probably mediated by the expression of FGF-7, while topical PMRP promoted hair growth by the stimulation of SHH expression.

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Source
http://dx.doi.org/10.1155/2015/517901DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4534627PMC
August 2015
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European Journal of Dermatology 2002

Chinese Journal of Dermatology 2005

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Chinese Journal Aesthetic Medicine 2004

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