keyword
MENU ▼
Read by QxMD icon Read
search

Ceramide keratinocyte

keyword
https://read.qxmd.com/read/30876920/involvement-of-cutaneous-sr-b1-in-skin-lipid-homeostasis
#1
Muresan Ximena Maria, Narzt Marie-Sophie, Brittany Woodby, Francesca Ferrara, Gruber Florian, Valacchi Giuseppe
BACKGROUND: The main functions of the skin are to protect against environmental insults and prevent water loss, which are performed by the complex lipid- and protein matrix present in the outermost layers of the epithelium. The lipidome of these outer layers is mainly composed of ceramides, fatty acids, and cholesterol, which regulates keratinocyte differentiation and skin barrier function. SR-B1 is a multifunctional scavenger receptor that is best known for facilitating uptake of cholesterol from HDL particles in the liver, but it is also expressed in the skin...
March 12, 2019: Archives of Biochemistry and Biophysics
https://read.qxmd.com/read/30838224/ifn-%C3%AE-reduces-epidermal-barrier-function-by-affecting-fatty-acid-composition-of-ceramide-in-a-mouse-atopic-dermatitis-model
#2
Hiroyuki Kanoh, Asako Ishitsuka, Etsuko Fujine, Shuhei Matsuhaba, Mitsuhiro Nakamura, Hiroyasu Ito, Naoki Inagaki, Yoshiko Banno, Mariko Seishima
IFN- γ is detected in chronic lesions of atopic dermatitis (AD); however, its specific role remains to be elucidated. An impaired stratum corneum barrier function is a hallmark of AD, and it is associated with a reduction in ceramides with long-chain fatty acids (FAs) in the stratum corneum. FA elongases, ELOVL1 and ELOVL4, are essential for the synthesis of these ceramides, together with ceramide synthase 3 (CerS3). We have previously shown that IFN- γ , but not other cytokines, induced the downregulation of these enzymes in cultured keratinocytes...
2019: Journal of Immunology Research
https://read.qxmd.com/read/30787169/the-nonlesional-skin-surface-distinguishes-atopic-dermatitis-with-food-allergy-as-a-unique-endotype
#3
Donald Y M Leung, Agustin Calatroni, Livia S Zaramela, Petra K LeBeau, Nathan Dyjack, Kanwaljit Brar, Gloria David, Keli Johnson, Susan Leung, Marco Ramirez-Gama, Bo Liang, Cydney Rios, Michael T Montgomery, Brittany N Richers, Clifton F Hall, Kathryn A Norquest, John Jung, Irina Bronova, Simion Kreimer, C Conover Talbot, Debra Crumrine, Robert N Cole, Peter Elias, Karsten Zengler, Max A Seibold, Evgeny Berdyshev, Elena Goleva
Skin barrier dysfunction has been reported in both atopic dermatitis (AD) and food allergy (FA). However, only one-third of patients with AD have FA. The purpose of this study was to use a minimally invasive skin tape strip sampling method and a multiomics approach to determine whether children with AD and FA (AD FA +) have stratum corneum (SC) abnormalities that distinguish them from AD without FA (AD FA -) and nonatopic (NA) controls. Transepidermal water loss was found to be increased in AD FA +. Filaggrin and the proportion of ω-hydroxy fatty acid sphingosine ceramide content in nonlesional skin of children with AD FA + were substantially lower than in AD FA - and NA skin...
February 20, 2019: Science Translational Medicine
https://read.qxmd.com/read/30711472/shedding-light-on-the-effects-of-1-25-dihydroxyvitamin-d-3-on-epidermal-lipid-barrier-formation-in-three-dimensional-human-skin-equivalents
#4
Arnout Mieremet, Rianne van Dijk, Gert Gooris, Joke A Bouwstra, Abdoelwaheb El Ghalbzouri
Human skin equivalents (HSEs) are three dimensional models resembling native human skin (NHS) in many aspects. Despite the manifold similarities to NHS, a restriction in its applications is the altered in vitro lipid barrier formation, which compromises the barrier functionality. This could be induced by suboptimal cell culturing conditions, which amongst others is the diminished activation of the vitamin D receptor (VDR) signalling pathway. The active metabolite of this signalling pathway is 1,25-dihydroxyvitamin D3 (1,25(OH)2 D3 )...
January 31, 2019: Journal of Steroid Biochemistry and Molecular Biology
https://read.qxmd.com/read/30623117/konjac-ceramide-kcer-regulates-keratinocyte-migration-by-sema3a-like-repulsion-mechanism
#5
Seigo Usuki, Noriko Tamura, Tomohiro Tamura, Shigeki Higashiyama, Kunikazu Tanji, Susumu Mitsutake, Asuka Inoue, Junken Aoki, Katsuyuki Mukai, Yasuyuki Igarashi
Previously, we proposed the following mechanism for konjac ceramide (kCer)-mediated neurite outgrowth inhibition: kCer binds to Nrp as a Sema3A agonist, resulting in Nrp1/PlexA complex formation and activation of the Sema3A signaling pathway to induce phosphorylation of CRMP2 and microtubule depolymerization. The Sema3A/Nrp1 signaling pathway is known to be also expressed in normal human keratinocytes. To determine whether kCer can function in human keratinocytes as it does in neurites, that is, if it can bind to Nrp1 in place of Sema3A, we studied the effect of kCer on HaCaT cell migration activity...
March 2019: Biochemistry and Biophysics Reports
https://read.qxmd.com/read/30460697/phytosphingosine-increases-biosynthesis-of-phytoceramide-by-uniquely-stimulating-the-expression-of-dihydroceramide-c4-desaturase-des2-in-cultured-human-keratinocytes
#6
Hyun Kyung Choi, Hyun-Ji Kim, Kwang-Hyeon Liu, Chang Seo Park
Ceramide NP is known to be the most abundant class of 12 ceramide (CER) families that form a permeability barrier in the human skin barrier. However, not many studies have been reported on the regulation of the biosynthesis of ceramide NP. Recently, it has been reported that phytosphingosine (PHS) treatment in the cultured keratinocytes (KC) notably increased the content of ceramide NP. However, the mechanism behind the PHS-induced enhancement of ceramide NP has not been elucidated. In this study, we investigated the effects of PHS on the expression of several essential genes for the biosynthesis of CER...
September 2018: Lipids
https://read.qxmd.com/read/30290227/the-role-of-pnpla1-in-%C3%AF-o-acylceramide-synthesis-and-skin-barrier-function
#7
REVIEW
Tetsuya Hirabayashi, Makoto Murakami, Akio Kihara
The human genome encodes nine enzymes belonging to the patatin-like phospholipase domain-containing lipase (PNPLA)/Ca2+ -independent phospholipase A2 (iPLA2 ) family. Although most PNPLA/iPLA2 enzymes are widely distributed and act on phospholipids or neutral lipids as (phospho)lipases to play homeostatic roles in lipid metabolism, the function of PNPLA1 remained a mystery until a few years ago. However, the recent finding that mutations in the human PNPLA1 gene are linked to autosomal recessive congenital ichthyosis (ARCI), as well as evidence obtained from biochemical and gene knockout studies, has shed light on the function of this enzyme in skin-specific sphingolipid metabolism rather than glycerophospholipid metabolism...
October 2, 2018: Biochimica et Biophysica Acta. Molecular and Cell Biology of Lipids
https://read.qxmd.com/read/30148701/ginsenoside-rb1-enhances-keratinocyte-migration-by-a-sphingosine-1-phosphate-dependent-mechanism
#8
Kyong-Oh Shin, Sung Jay Choe, Yoshikazu Uchida, Inyong Kim, Yoonhwa Jeong, Kyungho Park
The cutaneous wound healing process is tightly regulated by a range of cellular responses, including migration. Sphingosine-1-phosphate (S1P) is a signaling lipid produced in keratinocytes (KC) and it is known to stimulate skin wound repair through increased KC migration. Of the multifunctional triterpene ginsenosides, Rb1 enhances cutaneous wound healing process by increasing KC migration, but cellular mechanisms responsible for the Rb1-mediated increase in KC migration are largely unknown. Therefore, we hypothesized that, and assessed whether, Rb1 could stimulate KC migration through S1P-dependent mechanisms...
August 27, 2018: Journal of Medicinal Food
https://read.qxmd.com/read/30098864/cutaneous-permeability-barrier-function-in-signal-transducer-and-activator-of-transcription-6-deficient-mice-is-superior-to-that-in-wild-type-mice
#9
Wei Zhang, Takashi Sakai, Haruna Matsuda-Hirose, Mizuki Goto, Tomoko Yamate, Yutaka Hatano
BACKGROUND: Th2 cytokines exhibit a variety of inhibitory effects on permeability barrier function via signal transducer and activator of transcription 6 (STAT6). However, the role of STAT6 signaling on the construction and/or homeostasis of permeability barrier function in the physiological state has not been fully assessed. OBJECTIVE: We compared permeability barrier function between Stat6-deficient and wild-type C57BL/6 mice at steady state. METHODS AND RESULTS: Measurement of transepidermal water loss and quantitative penetration assay revealed that permeability barrier function was superior in Stat6-deficient mice...
October 2018: Journal of Dermatological Science
https://read.qxmd.com/read/30017509/phenotypic-and-lipidomic-characterization-of-primary-human-epidermal-keratinocytes-exposed-to-simulated-solar-uv-radiation
#10
Núria Dalmau, Nathalie Andrieu-Abadie, Romà Tauler, Carmen Bedia
BACKGROUND: Ultraviolet (UV) radiation is known to be one of the most important environmental hazards acting on the skin. The most part of UV radiation is absorbed in the epidermis, where keratinocytes are the most abundant and exposed cell type. Lipids have an important role in skin biology, not only for their important contribution to the maintenance of the permeability barrier but also for the production and storage of energy, membrane organization and cell signalling functions. However, the effects on the lipid composition of keratinocytes under UV radiation are little explored...
October 2018: Journal of Dermatological Science
https://read.qxmd.com/read/29912147/identification-of-rice-koji-extract-components-that-increase-%C3%AE-glucocerebrosidase-levels-in-human-epidermal-keratinocytes
#11
Kazuhisa Maeda, Yuuka Ogino, Ayano Nakamura, Keiji Nakata, Manabu Kitagawa, Seiki Ito
Rice miso contains many ingredients derived from rice koji and has been a valuable source of nutrition since ancient times. We found that the consumption of rice miso led to improvements in the moisture content of cheek stratum corneum, skin viscoelasticity, and skin texture. Further, rice miso extract was found to increase the mRNA expression and activity of β-glucocerebrosidase (β-GCase), an enzyme involved in ceramide synthesis in the stratum corneum, in cultures. In this study, we identified the lipid-derived components of rice koji that increase the β-GCase activity in cultured human epidermal keratinocytes...
June 18, 2018: Foods (Basel, Switzerland)
https://read.qxmd.com/read/29876372/fibroblast-and-keratinocyte-gene-expression-following-exposure-to-the-extracts-of-holy-basil-plant-ocimum-tenuiflorum-malabar-nut-plant-justicia-adhatoda-and-emblic-myrobalan-plant-phyllanthus-emblica
#12
Takao Someya, Katsura Sano, Kotaro Hara, Yoshimasa Sagane, Toshihiro Watanabe, R G S Wijesekara
This data article provides gene expression profiles, determined by using real-time PCR, of fibroblasts and keratinocytes treated with 0.01% and 0.001% extracts of holy basil plant ( Ocimum tenuiflorum ), sri lankan local name "maduruthala", 0.1% and 0.01% extracts of malabar nut plant ( Justicia adhatoda ), sri lankan local name "adayhoda" and 0.003% and 0.001% extracts of emblic myrobalan plant ( Phyllanthus emblica ), sri lankan local name "nelli", harvested in Sri Lanka. For fibroblasts, the dataset includes expression profiles for genes encoding hyaluronan synthase 1 (HAS1), hyaluronan synthase 2 (HAS2), hyaluronidase-1 (HYAL1), hyaluronidase-2 (HYAL2), versican, aggrecan, CD44, collagen, type I, alpha 1 (COL1A1), collagen, type III, alpha 1 (COL3A1), collagen, type VII, alpha 1 (COL7A1), matrix metalloproteinase 1 (MMP1), acid ceramidase, basic fibroblast growth factor (bFGF), fibroblast growth factor-7 (FGF7), vascular endothelial growth factor (VEGF), interleukin-1 alpha (IL-1α), cyclooxygenase-2 (cox2), transforming growth factor beta (TGF-β), and aquaporin 3 (AQP3)...
April 2018: Data in Brief
https://read.qxmd.com/read/29851147/effects-of-a-ceramide-containing-water-in-oil-ointment-on-skin-barrier-function-and-allergen-penetration-in-an-il-31-treated-3d-model-of-the-disrupted-skin-barrier
#13
Sebastian Huth, Laurenz Schmitt, Yvonne Marquardt, Ruth Heise, Bernhard Lüscher, Philipp M Amann, Jens M Baron
Atopic dermatitis (AD) is a chronically relapsing, pruritic inflammation of the skin with dryness and disturbed skin barrier function. Recently, we established that IL-31 treatment of human 3D skin models resulted in a disrupted skin barrier phenotype resembling AD. In this model, we found that IL-31 interferes with the differentiation of keratinocytes and inhibits the expression of terminal differentiation markers. In the present study, we investigated the effects of a ceramide-containing water-in-oil skin care ointment on the physical skin barrier structure and function in disrupted skin barrier models, generated either by using primary normal human epidermal keratinocytes (NHEK) or HaCaT cells...
September 2018: Experimental Dermatology
https://read.qxmd.com/read/29709911/sphingoid-base-upregulated-caspase-14-expression-involves-mapk
#14
Yukitoshi Nagahara, Kei Kawakami, Abudubari Sikandan, Daiki Yagi, Ryo Nishikawa, Takahisa Shinomiya
Sphingolipids are putative intracellular signal mediators in cell differentiation, growth inhibition, and apoptosis. Especially, sphingoid base-backbones of sphingolipids (sphingosine, sphinganine, and phytosphingosine) and their metabolites N-acyl-sphingoid bases (ceramides) are highly bioactive. In skin, one of the caspases, caspase-14, is expressed predominantly in cornifying epithelia, and caspase-14 plays an important role in keratinocyte differentiation. As ceramides were surrounding lipids in the keratinocytes and ceramides stimulate keratinocyte differentiation, we therefore examined the upregulation of caspase-14 by various sphingoid bases and ceramide...
2018: Biological & Pharmaceutical Bulletin
https://read.qxmd.com/read/29467325/lipid-abnormalities-in-atopic-skin-are-driven-by-type-2-cytokines
#15
Evgeny Berdyshev, Elena Goleva, Irina Bronova, Nathan Dyjack, Cydney Rios, John Jung, Patricia Taylor, Mingeum Jeong, Clifton F Hall, Brittany N Richers, Kathryn A Norquest, Tao Zheng, Max A Seibold, Donald Ym Leung
Lipids in the stratum corneum of atopic dermatitis (AD) patients differ substantially in composition from healthy subjects. We hypothesized that hyperactivated type 2 immune response alters AD skin lipid metabolism. We have analyzed stratum corneum lipids from nonlesional and lesional skin of AD subjects and IL-13 skin-specific Tg mice. We also directly examined the effects of IL-4/IL-13 on human keratinocytes in vitro. Mass spectrometric analysis of lesional stratum corneum from AD subjects and IL-13 Tg mice revealed an increased proportion of short-chain (N-14:0 to N-24:0) NS ceramides, sphingomyelins, and 14:0-22:0 lysophosphatidylcholines (14:0-22:0 LPC) with a simultaneous decline in the proportion of corresponding long-chain species (N-26:0 to N-32:0 sphingolipids and 24:0-30:0 LPC) when compared with healthy controls...
February 22, 2018: JCI Insight
https://read.qxmd.com/read/29430917/untargeted-metabolomics-reveal-lipid-alterations-upon-2-deoxyglucose-treatment-in-human-hacat-keratinocytes
#16
Pierre Le Pogam, Mickael Doué, Yann Le Page, Denis Habauzit, Maxim Zhadobov, Ronan Sauleau, Yves Le Dréan, David Rondeau
The glucose analogue 2-deoxyglucose (2-DG) impedes cancer progression in animal models and is currently being assessed as an anticancer therapy, yet the mode of action of this drug of high clinical significance has not been fully delineated. In an attempt to better characterize its pharmacodynamics, an integrative UPLC-Q-Exactive-based joint metabolomic and lipidomic approach was undertaken to evaluate the metabolic perturbations induced by this drug in human HaCaT keratinocyte cells. R-XCMS data processing and subsequent multivariate pattern recognition, metabolites identification, and pathway analyses identified eight metabolites that were most significantly changed upon a 3 h 2-DG exposure...
March 2, 2018: Journal of Proteome Research
https://read.qxmd.com/read/29428730/targeting-sphingosine-kinase-2-by-abc294640-inhibits-human-skin-squamous-cell-carcinoma-cell-growth
#17
Jianbo Zhou, Jin Chen, Huanmiao Yu
The activity of ABC294640, a small-molecular sphingosine kinase 2 (SphK2) inhibitor, in human skin squamous cell carcinoma (SCC) cells was tested in this study. SphK2 mRNA and protein are expressed in established (A431 cheilocarcinoma cell line) and primary human skin SCC cells. ABC294640 dose-dependently inhibited survival, cell cycle progression and proliferation of skin SCC cells. Furthermore, ABC294640 induced caspase-3/-9 and apoptosis activation in skin SCC cells. The SphK2 inhibitor was however non-cytotoxic to SphK2-null skin melanocytes, keratinocytes and fibroblasts...
March 4, 2018: Biochemical and Biophysical Research Communications
https://read.qxmd.com/read/29322079/fibroblast-and-keratinocyte-gene-expression-following-exposure-to-extracts-of-neem-plant-azadirachta-indica
#18
Takao Someya, Katsura Sano, Kotaro Hara, Yoshimasa Sagane, Toshihiro Watanabe, R G S Wijesekara
This data article provides gene expression profiles, determined by using real-time PCR, of fibroblasts and keratinocytes treated with 0.01% and 0.001% extracts of neem plant (Azadirachta indica), local name "Kohomba" in Sri Lanka, harvested in Sri Lanka. For fibroblasts, the dataset includes expression profiles for genes encoding hyaluronan synthase 1 (HAS1), hyaluronan synthase 2 (HAS2), hyaluronidase-1 (HYAL1), hyaluronidase-2 (HYAL2), versican, aggrecan, CD44, collagen, type I, alpha 1 (COL1A1), collagen, type III, alpha 1 (COL3A1), collagen, type VII, alpha 1 (COL7A1), matrix metalloproteinase 1 (MMP1), acid ceramidase, basic fibroblast growth factor (bFGF), fibroblast growth factor-7 (FGF7), vascular endothelial growth factor (VEGF), interleukin-1 alpha (IL-1α), cyclooxygenase-2 (cox2), transforming growth factor beta (TGF-β), and aquaporin 3 (AQP3)...
February 2018: Data in Brief
https://read.qxmd.com/read/29215741/analysis-of-sensitive-skin-barrier-function-basic-indicators-and-sebum-composition
#19
L Fan, Y Jia, L Cui, X Li, C He
OBJECTIVES: Sensitive skin (SS) is a condition characterised by high reactivity, low tolerance, and susceptibility to allergies of the skin. Owing to changes in the environment and marketing strategies, as well as the increasing public awareness about skin care, attention to skin condition is gradually increasing. The aim of this study is to explore the differences in the skin barrier of SS and normal skin (NS). METHODS: A questionnaire survey was conducted and basic indicators of the skin barrier were analysed...
April 2018: International Journal of Cosmetic Science
https://read.qxmd.com/read/29130419/recapitulation-of-native-dermal-tissue-in-a-full-thickness-human-skin-model-using-human-collagens
#20
Arnout Mieremet, Marion Rietveld, Rianne van Dijk, Joke A Bouwstra, Abdoelwaheb El Ghalbzouri
OBJECTIVE: Full-thickness skin models comprise a three-dimensional dermal equivalent based on an animal-derived collagen matrix that harbors fibroblasts and an epidermal equivalent formed by keratinocytes. The functionality of both equivalents is influenced by many factors, including extracellular matrix composition and resident cell type. Animal-derived collagens differ in amino acid composition and physicochemical properties from human collagens. This composition could alter the functionality of the dermal equivalent and epidermal morphogenesis with the barrier formation in full-thickness models (FTMs)...
June 2018: Tissue Engineering. Part A
keyword
keyword
163954
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"