Changes of Facial Wrinkle after Topical Application of On Emulsion Containing Medimin A

Medimin A를 함유한 O/W 에멀전의 주름 개선 효과

  • Published : 1999.03.01

Abstract

Medimin A is a derivative of vitamin A which has been developed by coupling retinoic acid with polyethylene glycol(PEG) to enhance skin permeability and stability. We carried out the collagen synthesis and clinical test to examine the reducing effect of wrinkles by Medimin A. In vitro collagen synthesis was evaluated by quantitative assay of ($^3$H)-proline incorporation into collagenase sensitive protein in fibroblast cultures. Clinical test was evaluated by image analysis of skin replica, visual observation and self-estimated response of volunteers for 10 weeks. Medimin A stimulated about 40% in collagen synthesis. The area of main deep wrinkle on the skin replica was reduced 38.4% with topical application of O/W emulsion containing 0.2% Medimin A. The wrinkles on the eye region was also reduced 25.4%-44.1% by the visual observation and 93% of all volunteers responded that topical application of the O/W emulsion was showed some reducing effect of wrinkles after 10 weeks. From these results, we suggest that Medimin A is a potent anti-wrinkle agent by objective evaluation methods(in vitro collagen synthesis and image analysis of skin replica) and subjective evaluation methods(visual observation and self-estimated response of volunteers).

Medimin A는 경피 흡수성과 안정성을 높이기 위해 retinoic acid와 polyethylene glycol(PEG)를 결합시켜 개발한 비타민 A 유도체이다. Medimin A의 주름 완화 효과를 확인하기 위하여 콜라겐 합성능 및 임상 평가를 실시하였다. Invitro 콜라겐 합성능은 섬유아세포를 배양하여 생산되는 단백질 중에서, collagenase에만 특이적으로 분해되는 단백질에 함유된 [$^3$H]-proline의 양을 측정하여 평가하였으며, 임상 평가는 피부주형(replica)의 영상분석, 주름의 육안적 관찰, 피시험자의 자가 판단에 의하여 평가하였다. Medimin A를 섬유아세포에 처리한 결과 104% 농도에서 약 40%의 콜라겐 합성 증진을 보였다. Medimin A가 0.2%함유된 O/W 에멀젼을 10주간 피시험자에 도포한 결과, 피부 주형에서 가장 깊은 주름이 약 38.4% 가 감소되었으며, 육안적 관찰에 의한 눈가 주름은 25.5% - 44.1%가 감소되었다. 또한 피시험자의 자가 진단에 의하면 전체 피시험자 중 93%가 10주간 도포 후 주름이 호전되었다고 응답하였다. 이상과 같은 결과에서, Medimin A는 객관적 평가법(in vitro 콜라겐 합성능, 피부 주형의 영상분석) 및 주관적 평가법(육안적 관찰, 피시험자의 자가 진단)에서 모두 유의하게 주름을 완하시키는 물질임이 확인되었다.

Keywords

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