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    털진득찰 추출물이 손상모(損傷毛)와 육모(育毛)에 미치는 영향에 관한 연구 = A Study on the Effects of Sigesbeckia pubescens Extract on Damaged Hair and Hair Growth

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    https://www.riss.kr/link?id=T17545870

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    다국어 초록 (Multilingual Abstract) kakao i 다국어 번역

    Oxidative stress associated with repeated chemical hair treatments contributes to hair damage and may impair follicular function, creating a need for safer multifunctional materials for hair repair and growth support. This study evaluated the antioxidant activity of an ethanolic extract of Sigesbeckia pubescens (SPE) and examined its effects on chemically damaged hair ex vivo and hair growth in C57BL/6 mice in vivo. Antioxidant activity was assessed using DPPH and ABTS assays. Hair-repair effects were evaluated by methylene blue absorbance, tensile-strength testing, and low-voltage scanning electron microscopy (LV-SEM) in bleached hair fibers. Hair-growth activity was assessed by gross observation, histopathology, and ImageJ-based follicle-length measurements in depilated mice. SPE showed strong radical-scavenging activity, with DPPH and ABTS scavenging rates of 81.24 ± 2.11% at 1.0 ㎎/mL and 89.97 ± 3.76% at 0.25 ㎎/mL, respectively. In damaged hair, 5% SPE reduced methylene blue absorbance to 0.34 ± 0.04, compared with 0.52 ± 0.04 in the damaged control, indicating structural improvement of up to 45%. The same treatment increased tensile strength to 229.15 ± 16.56 N/㎟, corresponding to a 64.41% increase over the damaged control and recovery to 95.20% of the virgin-hair level. LV-SEM confirmed concentration-dependent realignment of disrupted cuticles. In vivo, topical SPE accelerated post-depilation skin darkening from day 7 and increased mean follicle length to 678.68 ± 151.59 ㎛ in the 30% SPE group, compared with 152.14 ± 23.02 ㎛ in the vehicle control and 279.38 ± 38.79 ㎛ in the 5% minoxidil group. These findings suggest that SPE has antioxidant, hair-repairing, and hair-growth- promoting activity and may serve as a promising natural ingredient for functional hair-care formulations.
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    Oxidative stress associated with repeated chemical hair treatments contributes to hair damage and may impair follicular function, creating a need for safer multifunctional materials for hair repair and growth support. This study evaluated the antioxid...

    Oxidative stress associated with repeated chemical hair treatments contributes to hair damage and may impair follicular function, creating a need for safer multifunctional materials for hair repair and growth support. This study evaluated the antioxidant activity of an ethanolic extract of Sigesbeckia pubescens (SPE) and examined its effects on chemically damaged hair ex vivo and hair growth in C57BL/6 mice in vivo. Antioxidant activity was assessed using DPPH and ABTS assays. Hair-repair effects were evaluated by methylene blue absorbance, tensile-strength testing, and low-voltage scanning electron microscopy (LV-SEM) in bleached hair fibers. Hair-growth activity was assessed by gross observation, histopathology, and ImageJ-based follicle-length measurements in depilated mice. SPE showed strong radical-scavenging activity, with DPPH and ABTS scavenging rates of 81.24 ± 2.11% at 1.0 ㎎/mL and 89.97 ± 3.76% at 0.25 ㎎/mL, respectively. In damaged hair, 5% SPE reduced methylene blue absorbance to 0.34 ± 0.04, compared with 0.52 ± 0.04 in the damaged control, indicating structural improvement of up to 45%. The same treatment increased tensile strength to 229.15 ± 16.56 N/㎟, corresponding to a 64.41% increase over the damaged control and recovery to 95.20% of the virgin-hair level. LV-SEM confirmed concentration-dependent realignment of disrupted cuticles. In vivo, topical SPE accelerated post-depilation skin darkening from day 7 and increased mean follicle length to 678.68 ± 151.59 ㎛ in the 30% SPE group, compared with 152.14 ± 23.02 ㎛ in the vehicle control and 279.38 ± 38.79 ㎛ in the 5% minoxidil group. These findings suggest that SPE has antioxidant, hair-repairing, and hair-growth- promoting activity and may serve as a promising natural ingredient for functional hair-care formulations.

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    목차 (Table of Contents)

    • Ⅰ. 서론
    • 1. 연구의 필요성
    • 2. 연구의 목적
    • Ⅱ. 이론적 배경
    • 1. 두피와 모발
    • Ⅰ. 서론
    • 1. 연구의 필요성
    • 2. 연구의 목적
    • Ⅱ. 이론적 배경
    • 1. 두피와 모발
    • 1) 두피 구조 및 생리
    • 2) 모낭과 Wnt/β-catenin signaling
    • 3) 모발의 구조 및 생리
    • 2. 탈모의 병태생리
    • 3. 산화스트레스와 항산화
    • 1) 산화스트레스
    • 2) 항산화 시스템
    • 4. 털진득찰(Sigesbeckia pubescens)
    • 1) 식물학적 개요
    • 2) 주요 생리활성 성분
    • Ⅲ. 실험 재료 및 방법
    • 1. 실험 재료
    • 2. 실험 방법
    • 1) 항산화 활성 측정실험
    • (1) 실험 약제 및 시약
    • (2) DPPH assay
    • (3) ABTS+ assay
    • 2) 손상 모발 개선실험
    • (1) 모발 채취 및 시료 제작
    • (2) 실험 약제 및 시약
    • (3) 메틸렌블루 측정
    • (4) 인장강도 측정
    • (5) LV-SEM 이미지 관찰
    • 3) C57BL/6 마우스 실험
    • (1) 실험동물
    • (2) 사육환경 및 관리
    • (3) 실험군 설정 및 처치
    • (4) 육안적 관찰에 의한 발모 효과의 분석
    • (5) 피부 조직 병리학적 관찰
    • (6) 모낭 길이 측정
    • 3. 데이터분석 및 통계처리
    • Ⅳ. 결과
    • 1. 항산화 활성 측정실험
    • 1) DPPH assay
    • 2) ABTS+ assay
    • 2. 손상 모발 개선 실험
    • 1) 메틸렌블루 측정
    • 2) 인장강도 측정
    • 3) LV-SEM 이미지 관찰
    • 3. C57BL/6 마우스 실험
    • 1) 육안적 관찰에 의한 발모 효과의 분석
    • 2) 피부 조직 병리학적 관찰
    • 3) 모낭 길이 측정
    • Ⅴ. 결론 및 고찰
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