نتایج جستجو برای: sebum

تعداد نتایج: 628  

2016
Poonam Mudgil Douglas Borchman Dylan Gerlach Marta C. Yappert

PURPOSE Sebum may contribute to the composition of the tear film lipid layer naturally or as a contaminant artifact from collection. The aims of this study were to determine: if sebum changes the rheology of meibum surface films; if the resonance near 5.2 ppm in the 1H-NMR spectra of sebum is due to squalene (SQ); and if sebum or SQ, a major component of sebum, interacts with human meibum. ME...

Journal: :Dermato-endocrinology 2009
Mauro Picardo Monica Ottaviani Emanuela Camera Arianna Mastrofrancesco

The principal activity of mature sebaceous glands is producing and secreting sebum, which is a complex mixture of lipids. Sebum composition is different among species and this difference is probably due to the function that sebum has to absolve. In human sebum there are unique lipids, such as squalene and wax esters not found anywhere else in the body nor among the epidermal surface lipids. Mor...

Journal: :Aesthetic surgery journal 2015
Peiru Min Wenjing Xi Luca Grassetti Aurelia Trisliana Perdanasari Matteo Torresetti Shaoqing Feng Weijie Su Zheming Pu Yan Zhang Sheng Han Yi Xin Zhang Giovanni Di Benedetto Davide Lazzeri

BACKGROUND Research has investigated the decrease in human skin sebum after the application of botulinum toxin. Few studies of the mechanism and objective assessments of this phenomenon have been conducted and the correlation between the sebum production and injection dosages or techniques remains unclear. OBJECTIVES We prospectively investigated the sebum regulation and its gradient around t...

Journal: :Acta dermato-venereologica 2007
Gil Yosipovitch Mark Tang Aerlyn G Dawn Mark Chen Chee Leok Goh Yiung Huak Lim Fong Seng

Sebum production is thought to play a major role in acne vulgaris in adolescents. Psychological stress may exacerbate acne; however, it is not known whether the perceived association between stress and acne exacerbation is due to increased sebum production. The aims of this study were to determine: (i) if psychological stress in adolescents is associated with increased sebum production; and (ii...

Journal: :Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging 2005
Sang Woong Youn Jung Im Na Sun Young Choi Chang Hun Huh Kyoung Chan Park

BACKGROUND/AIMS Facial sebum secretions are known to change under various circumstances. Facial skin types have been categorized as oily, normal, dry, and combination types. However, these have been evaluated subjectively by individuals to date, and no objective accepted standard measurement method exists. The combination skin type is most common, but its definition is vaguer than the definitio...

2017

The sebaceous gland is composed of sebaceous gland cells that accumulate intracellular lipid droplets when undergoing differentiation. The extent of lipid droplet formation within the sebaceous gland cells thus represents their differentiation status. On reaching maturity, the sebaceous gland cells are then destroyed and the intracellular lipids are secreted to the skin surface whereby they for...

2017
Marianna Lovászi Andrea Szegedi Christos C. Zouboulis Dániel Törőcsik

The major role of sebaceous glands in mammals is to produce sebum, which coats the epidermis and the hair providing waterproofing, thermoregulation and photoprotection. However, as the need for these functions decreased along the evolutionary changes in humans, a relevant question has been raised: are sebaceous glands and sebum the remnants of our mammalian heritage or do they have overtaken a ...

2011
SY Wong

Sebum is secreted by sebaceous gland via holocrine secretion. It contains free fatty acid, wax and sterol esters, tr iglycerides and squalene. The sebaceous glands are distributed mainly at scalp, face, upper back and chest. The secretion of sebum is influenced by androgen and is increased at the time of puberty. There is also diurnal and seasonal variation. The sebum may increase in the mornin...

Journal: :Annals of clinical and laboratory science 1992
Z Tretjak J Knight J Wilkins D Setoda R Voorhees

Sebum was collected from forehead skin in five compulsive heroin and/or cocaine (substance) users and in five controls over three consecutive periods, each lasting three hours. The participants were adult black and white men similar in age and smoking habits, who did not consume alcohol. Lipoperoxides were determined in sebum as malondialdehyde by high performance liquid chromatography. Two par...

2015
Takeshi Nakahara Yoichi Moroi Koichi Takayama Eriko Itoh Makiko Kido-Nakahara Yoichi Nakanishi Masutaka Furue

BACKGROUND It has recently been shown that patients treated with epidermal growth factor receptor (EGFR) inhibitors often develop various cutaneous adverse events. While the pathogenesis underlying these events remains unclear, the relationship between skin toxicity induced by EGFR inhibitors and the sebaceous glands that express EGFR has been previously reported. OBJECTIVES The primary aim o...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید