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Effects of Skin Surface Lipids on Skin Health
Faqing Feng,Laiji Ma,Zhaohui Qu,Yinmao Dong,Fan Yi 한국피부과학연구원 2019 아시안뷰티화장품학술지 Vol.17 No.1
Skin surface lipids are composed of sebaceous glands secreting lipids and epidermal disintegration lipids. The main components include triglycerides, free fatty acids, wax esters, squalene, cholesterol and so on. Skin surface lipids adhere to the surface of the skin and rely on their physical, chemical and biological properties to be important for skin health. This article reviews the relevant literatures at home and abroad, briefly describes the effects of skin surface lipids on skin moisturization, anti-oxidation and maintenance of micro-ecology, and mainly introduces the oxidation/metabolism of squalene/free fatty acids, which is more affected by external harmful factors than other skin surface lipids. As well as, the effects on skin health of squalene oxidation products and triglyceride metabolites are introduced. Above all, the oxidation/metabolism of skin surface lipids and the role of their products are illustrated in order to reveal the relationship between skin surface lipids and skin health and to provide a theoretical reference for the research and development of cosmetics by regulating skin surface lipids. Keywords: Skin surface lipids, Squalene, Free fatty acids, Oxidation
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Zhao Man,Ju Yanhu,Zhao Bo,Li Xiaoming,Dai LIli,Qu Jicheng,Chu Zhaohui,Ding Xinhua 한국식물생명공학회 2020 Plant biotechnology reports Vol.14 No.5
Small cysteine-rich peptides (CRPs) are important in plant responses to biotic and abiotic stresses. OsDT11, encoding an 88 amino acid CRP-type protein, has been reported to enhance tolerance to drought in rice (Oryza sativa L.) without negatively afecting other agronomic traits. However, the molecular mechanisms of OsDT11-mediated drought tolerance are still unclear. Here, we performed RNA-Seq analysis to compare the transcriptome profles between wild-type (WT) and OsDT11-overexpressing (OE) rice lines under drought stress or under control (non-drought) conditions. A total of 1570 and 1421 diferentially expressed genes were identifed in the OE lines and the WT under drought treatment, respectively, compared to non-drought conditions. Gene ontology analysis indicated that the 430 up-regulated genes in common to both OE and the WT lines were induced for functions related to responses to water deprivation and to abscisic acid (ABA). More than half of these genes had higher expression in the OE than in the WT under drought stress. In the OE, but not in the WT, 294 genes were specifcally up-regulated under drought stress and were functionally enriched in starch and sucrose biosyn�thetic processes and in response to stress. This implies that OsDT11 not only triggers strongly response to drought stress, but also alters several metabolic processes to enhance drought tolerance. Gene expression profling suggests that OsDT11 confers drought tolerance by mediating an enhanced response to drought stress in an ABA-dependent signaling pathways.
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