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NTIS 바로가기Journal of nutrition and health, v.50 no.3, 2017년, pp.236 - 245
고은정 (숙명여자대학교 생활과학대학 식품영양학과) , 유아남 (숙명여자대학교 생활과학대학 식품영양학과) , 김현숙 (숙명여자대학교 생활과학대학 식품영양학과)
Purpose: The aim of this study was to assess the effects of guava leaf extract (GLE) supplementation on antioxidant enzyme activity and expression of endothelial nitric oxide synthase (eNOS) mRNA in ovariectomized rats. Methods: All animals were randomly assigned to four groups (n = 7 for each group...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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산화적 손상으로 인해 나타나는 문제는? | 1,2 또한 항산화 효소인 superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase(GPx)의 활성이 저하되고 체내 활성산소종 (reactive oxygen species, ROS)의 세포내 생성과 항산화 방어 기전의 불균형으로 인해 산화스트레스 및 세포손상이 유발된다고 보고되었다.3 이러한 산화적 손상이 내피세포의 기능장애에 직접적인 영향을 주며 특히 17β-estradiol의 결핍으로 estrogen receptor α에 의해 매개되는 endothelial nitric oxide synthase (eNOS)가 감소되고 주로 면역반응 조절 및 세포독성에 관여하는 inducible nitric oxide synthase(iNOS)의 활성이 증가하여 산화질소 (nitric oxide, NO)의 생성을 증가시킨다.4 따라서 폐경기 여성의 대사적 장애를 위해 호로몬 대체요법이 시도되었으나 에스트로겐 치료는 장기간 사용 시 부작용에 대한 보고가 있어, 5 생리학적부작용이 적은 천연물에서 해결책을 찾으려는 노력이 계속되고 있다. | |
폐경으로 인해 에스트로겐이 부족해지면 나타나는 현상은? | 폐경으로 인한 에스트로겐 결핍은 혈중 총 콜레스테롤(total cholesterol, TC), 저밀도 지단백질 (low density lipoprotein cholesterol, LDL-C) 뿐만 아니라 중성지방(triglyceride, TG) 농도를 증가시키는 한편, 고밀도 지단백질 (high density lipoprotein cholesterol, HDL-C)을 감소시킨다는 보고가 있다. 1,2 또한 항산화 효소인 superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase(GPx)의 활성이 저하되고 체내 활성산소종 (reactive oxygen species, ROS)의 세포내 생성과 항산화 방어 기전의 불균형으로 인해 산화스트레스 및 세포손상이 유발된다고 보고되었다. | |
폐경으로 인한 에스트로겐 결핍으로 인해 활성이 떨어지는 항산화 효소는 무엇인가? | 폐경으로 인한 에스트로겐 결핍은 혈중 총 콜레스테롤(total cholesterol, TC), 저밀도 지단백질 (low density lipoprotein cholesterol, LDL-C) 뿐만 아니라 중성지방(triglyceride, TG) 농도를 증가시키는 한편, 고밀도 지단백질 (high density lipoprotein cholesterol, HDL-C)을 감소시킨다는 보고가 있다. 1,2 또한 항산화 효소인 superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase(GPx)의 활성이 저하되고 체내 활성산소종 (reactive oxygen species, ROS)의 세포내 생성과 항산화 방어 기전의 불균형으로 인해 산화스트레스 및 세포손상이 유발된다고 보고되었다.3 이러한 산화적 손상이 내피세포의 기능장애에 직접적인 영향을 주며 특히 17β-estradiol의 결핍으로 estrogen receptor α에 의해 매개되는 endothelial nitric oxide synthase (eNOS)가 감소되고 주로 면역반응 조절 및 세포독성에 관여하는 inducible nitric oxide synthase(iNOS)의 활성이 증가하여 산화질소 (nitric oxide, NO)의 생성을 증가시킨다. |
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