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갈만 추출물의 미백 기능 및 안전성에 대한 임상적 유용성 평가
황연실(Yeon Sil Hwang),김대성(Dae Sung Kim),조다정(Da Jung Jo),김다은(Da Eun Kim),장보윤(Bo Yoon Chang),류자현(Ja Hyun Ryu),김혜수(Hye Soo Kim),조형권(Hyoung Kwon Cho),김성연(Sung Yeon Kim) 대한약학회 2017 약학회지 Vol.61 No.4
Melanin is major factor that determines skin color as well as one of the defense systems that prevent the UV-induced damage. White and clean skin is very important part of the satisfaction of appearance and life quality. The purpose of this clinical study was to investigate the anti-melanogenesis activity for whitening product containing aerial part of Puer-aria lobata extract (APPL) can be utilized based on the increase in demands for cosmetics, particularly natural products. A total of 23 subjects who visited Dermapro Skin Research Center were included in this study. Volunteers were irradiated at a test site with UVA+B to induce pigmentation then applied 3% APPL at the test site for 8 weeks. Changes in visual eval-uation on pigmentation, average melanin content were observed, and subjective skin lightness and color improvements were analyzed. In all parameters measured in this clinical study, APPL treated group showed significant improvement com-pared with the control group. After 4 weeks, subjects with 3% APPL treatment started to improve melanin content and visual evaluation on pigmentation and skin lightness. Skin colors have improved from 8 weeks of treatment with 3% APPL. The safety of product containing 3% APPL was also confirmed. Indexes of subjective irritation(itching, prickling, tickling, burning, stinging, stiffness, tightening etc.) and objective irritation(erythema, edema, scale, papule etc.) proved that there was no adverse reaction on skin upon treatment of products. Considering all the results obtained, 3% APPL product can be used as a safe and effective skin-whitening agent.
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김다은,김성연,황연실,장보윤,한지혜,김대성,김혜수,조형권 한국생약학회 2016 생약학회지 Vol.47 No.4
The purpose of this study was to evaluate the whitening effect of aerial part of Pueraria lobata and mechanisms. Aerial part of Pueraria lobata, dose-dependently reduced the melanin content. Aerial part of Pueraria lobata, significantly decreased cellular tyrosinase activity, while there was not any effect on tyrosinase in cell-free conditions. To elucidate the mechanisms behind the aerial part of Pueraria lobata, treated melanogenesis regulation, the expressions of melanogensis related genes, proteins, and the activity of a-glucosidase were determined. Aerial part of Pueraria lobata, significantly inhibited gene and protein levels of MITF, tyrosinase and TRP-1. It suppressed the a-glucosidase, leading to inhibition on the maturation of tyrosinase. Also aerial part of Pueraria lobata, was observed to have the high antioxidant activity. These results suggested that whitening effect of aerial part of Pueraria lobata, should be due to the down-regulation of MITF, tyrosinase and TRP-1 expression and the intercepting maturation of tyrosinase through suppressing a-glucosidase. Another should be the high antioxidant activity. The findings show the possibility that aerial part of Pueraria lobata, can be used as a potential skin-whitening agent.
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CTHRC1 promotes angiogenesis by recruiting Tie2-expressing monocytes to pancreatic tumors
이재민,송진회,권은수,Seongyea Jo,강민경,김연정,황연실,배호성,강태흥,장수환,조희준,김송철,김석호,고상석 생화학분자생물학회 2016 Experimental and molecular medicine Vol.48 No.-
CTHRC1 (collagen triple-helix repeat-containing 1), a protein secreted during the tissue-repair process, is highly expressed in several malignant tumors, including pancreatic cancer. We recently showed that CTHRC1 has an important role in the progression and metastasis of pancreatic cancer. Although CTHRC1 secretion affects tumor cells, how it promotes tumorigenesis in the context of the microenvironment is largely unknown. Here we identified a novel role of CTHRC1 as a potent endothelial activator that promotes angiogenesis by recruiting bone marrow-derived cells to the tumor microenvironment during tumorigenesis. Recombinant CTHRC1 (rCTHRC1) enhanced endothelial cell (EC) proliferation, migration and capillary-like tube formation, which was consistent with the observed increases in neovascularization in vivo. Moreover, rCTHRC1 upregulated angiopoietin-2 (Ang-2), a Tie2 receptor ligand, through ERK-dependent activation of AP-1 in ECs, resulting in recruitment of Tie2-expressing monocytes (TEMs) to CTHRC1-overexpressing tumor tissues. Treatment with a CTHRC1-neutralizing antibody-abrogated Ang-2 expression in the ECs in vitro. Moreover, administration of a CTHRC1-neutralizing antibody to a xenograft mouse model reduced the tumor burden and infiltration of TEMs in the tumor tissues, indicating that blocking the CTHRC1/Ang-2/TEM axis during angiogenesis inhibits tumorigenesis. Collectively, our findings support the hypothesis thatCTHRC1 induction of the Ang-2/Tie2 axis mediates the recruitment of TEMs, which are important for tumorigenesis and can be targeted to achieve effective antitumor responses in pancreatic cancers. CTHRC1 (collagen triple-helix repeat-containing 1), a protein secreted during the tissue-repair process, is highly expressed in several malignant tumors, including pancreatic cancer. We recently showed that CTHRC1 has an important role in the progression and metastasis of pancreatic cancer. Although CTHRC1 secretion affects tumor cells, how it promotes tumorigenesis in the context of the microenvironment is largely unknown. Here we identified a novel role of CTHRC1 as a potent endothelial activator that promotes angiogenesis by recruiting bone marrow-derived cells to the tumor microenvironment during tumorigenesis. Recombinant CTHRC1 (rCTHRC1) enhanced endothelial cell (EC) proliferation, migration and capillary-like tube formation, which was consistent with the observed increases in neovascularization in vivo. Moreover, rCTHRC1 upregulated angiopoietin-2 (Ang-2), a Tie2 receptor ligand, through ERK-dependent activation of AP-1 in ECs, resulting in recruitment of Tie2-expressing monocytes (TEMs) to CTHRC1-overexpressing tumor tissues. Treatment with a CTHRC1-neutralizing antibody-abrogated Ang-2 expression in the ECs in vitro. Moreover, administration of a CTHRC1-neutralizing antibody to a xenograft mouse model reduced the tumor burden and infiltration of TEMs in the tumor tissues, indicating that blocking the CTHRC1/Ang-2/TEM axis during angiogenesis inhibits tumorigenesis. Collectively, our findings support the hypothesis that CTHRC1 induction of the Ang-2/Tie2 axis mediates the recruitment of TEMs, which are important for tumorigenesis and can be targeted to achieve effective antitumor responses in pancreatic cancers.
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