Min Kyung Jung1, Soogyeong Ha1, Scarlett Yoona Huh2, Seung Beom Park3, Sangyoon Kim3, Yoolhee Yang4, Daejin Kim5, Dae Young Hur5, Hyuk Jeong6, Sa Ik Bang7, Hyunjeong Park8, Daeho Cho9. 1. Department of Life Science, Sookmyung Women's University, Chungpa-Dong 2-Ka, Yongsan-ku, Seoul 140-742, Republic of Korea. 2. Department of Biological Sciences, University of Connecticut, CT 06269-3042, USA. 3. Biotech. Team, Cent'l Res. Inst., Ilyang Pharm., Co., Ltd., 359, Giheung-gu, Yongin-si, Gyeonggi-do, 449-726, Republic of Korea. 4. Department of Plastic Surgery, College of Medicine, Sungkyunkwan University, Seoul 110-745, Republic of Korea. 5. Department of Anatomy, Inje University College of Medicine, Pusan 614-735, Republic of Korea. 6. Department of Chemistry, Sookmyung Women's University, Cheongpa-ro 47-gil 100, Yongsan-Ku, Seoul 140-742, Republic of Korea. 7. Department of Plastic Surgery, College of Medicine, Sungkyunkwan University, Seoul 110-745, Republic of Korea. Electronic address: si55.bang@samsung.com. 8. Department of Dermatology, St. Mary's Hospital, The Catholic University, Seoul 137-701, Republic of Korea. Electronic address: hjpark@catholic.ac.kr. 9. Department of Life Science, Sookmyung Women's University, Chungpa-Dong 2-Ka, Yongsan-ku, Seoul 140-742, Republic of Korea. Electronic address: cdhkor@sookmyung.ac.kr.
Abstract
AIMS: Recently, immature adipocyte lineage cells have been suggested as a potential hair-growth stimulator. Diverse studies have been attempted to find methods for the preconditioning of immature adipocyte lineage cells. The present study investigates the effect of conditioned medium (CM) from vitamin D3 (Vd3) pre-activated preadipocytes on hair-growth ability. MAIN METHODS: To test the effect of CM from Vd3 pre-activated preadipocytes on hair-growth efficiency in mice, we compared the differences in hair regenerated after injecting CM from mouse preadipocytes pre-activated with or without Vd3. Next, to determine the regulating factors, the VEGF level was measured by ELISA and angiogenesis level was evaluated by IHC. Finally, the signaling mechanism was investigated by inhibitor kinase assay and western blotting. KEY FINDINGS: The CM from Vd3 pre-activated preadipocyte injection markedly promoted the ability of hair regeneration in mice. The VEGF levels were increased by Vd3 treatment in vitro and the CM from Vd3 pre-activated preadipocytes significantly increased the angiogenesis in vivo, suggesting the involvement of angiognensis in the hair regeneration induced by CM from pre-activated preadipocytes. In signaling study, Vd3-enhanced VEGF production was reduced by an ERK1/2 inhibitor and the level of ERK1/2 phosphorylation was increased by treatment with Vd3. SIGNIFICANCE: This has been the first report on CM from Vd3 pre-activated preadipocyte displaying stimulatory effects on hair growth via the enhancement of angiogenesis in a hairless-induced C57BL/6 mice.
AIMS: Recently, immature adipocyte lineage cells have been suggested as a potential hair-growth stimulator. Diverse studies have been attempted to find methods for the preconditioning of immature adipocyte lineage cells. The present study investigates the effect of conditioned medium (CM) from vitamin D3 (Vd3) pre-activated preadipocytes on hair-growth ability. MAIN METHODS: To test the effect of CM from Vd3 pre-activated preadipocytes on hair-growth efficiency in mice, we compared the differences in hair regenerated after injecting CM from mouse preadipocytes pre-activated with or without Vd3. Next, to determine the regulating factors, the VEGF level was measured by ELISA and angiogenesis level was evaluated by IHC. Finally, the signaling mechanism was investigated by inhibitor kinase assay and western blotting. KEY FINDINGS: The CM from Vd3 pre-activated preadipocyte injection markedly promoted the ability of hair regeneration in mice. The VEGF levels were increased by Vd3 treatment in vitro and the CM from Vd3 pre-activated preadipocytes significantly increased the angiogenesis in vivo, suggesting the involvement of angiognensis in the hair regeneration induced by CM from pre-activated preadipocytes. In signaling study, Vd3-enhanced VEGF production was reduced by an ERK1/2 inhibitor and the level of ERK1/2 phosphorylation was increased by treatment with Vd3. SIGNIFICANCE: This has been the first report on CM from Vd3 pre-activated preadipocyte displaying stimulatory effects on hair growth via the enhancement of angiogenesis in a hairless-induced C57BL/6 mice.