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https://www.readbyqxmd.com/read/29454536/the-role-of-the-ovol1-ovol2-axis-in-normal-and-diseased-human-skin
#1
REVIEW
Gaku Tsuji, Takamichi Ito, Takahito Chiba, Chikage Mitoma, Takeshi Nakahara, Hiroshi Uchi, Masutaka Furue
OVOLs (OVO-like proteins) are ubiquitously conserved genes encoding a C2 H2 zinc finger transcription factor in mammals. Functional studies on OVOL1 and OVOL2 using knockout mice have suggested that these genes play a pivotal role in the development of epithelial tissues arising from germ cells; however, the role of the OVOL1-OVOL2 axis in normal and diseased tissues remains unclear. This review highlights recent advances in understanding how the OVOL1-OVOL2 axis modulates cell differentiation and proliferation in human keratinocytes, hair follicles, and benign or malignant skin tumors including squamous cell carcinoma and malignant melanoma...
February 12, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29428354/uncommon-filaggrin-variants-are-associated-with-persistent-atopic-dermatitis-in-african-americans
#2
David J Margolis, Nandita Mitra, Heather Gochnauer, Bradley Wubbenhorst, Kurt D'Andrea, Adam Kraya, Ole Hoffstad, Jayanta Gupta, Brian Kim, Albert Yan, Zelma Chiesa Fuxench, Katherine L Nathanson
Atopic dermatitis (AD) is a common illness that has been associated with filaggrin gene (FLG) loss of function (LoF) variation. In African-Americans, a group that commonly has AD and has not been well studied, FLG LoF variation is rarely found. The objective was to use massively parallel sequencing to evaluate FLG LoF variation in children of African ancestry to evaluate the association between FLG LoF variation and AD and AD persistence. We studied 262 African American children with AD. Nine unique FLG exon 3 LoF variants were identified for an overall minor variant frequency (MVF) of 6...
February 8, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29423165/surgical-management-of-digital-ischemia-caused-by-constriction-band-formation-in-a-patient-with-ichthyosis-vulgaris
#3
Tian Ran Zhu, Jonathan Bass, Scott Schmidt
Ichthyosis is a broad and loosely defined group of hereditary and acquired disorders characterized by filaggrin dysfunction and impaired epidermal homeostasis that results in dry, scaly and thickened skin. Individuals with truncation mutations in the profilaggrin gene coding for filaggrin are strongly predisposed to severe forms of ichthyosis. The phenotypical expression of ichthyosis caused by the same genotypical mutation can vary considerably in severity and in regards to how much constricting scar tissue develops...
September 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/29371996/molecular-mechanism-of-atopic-dermatitis-induction-following-sensitization-and-challenge-with-2-4-dinitrochlorobenzene-in-mouse-skin-tissue
#4
JiYoun Kim, JaeHee Lee, SoJung Shin, AhRang Cho, Yong Heo
Laboratory animal models have been developed to investigate preventive or therapeutic effect of medicinal products, or occurrence or progression mechanism of atopic dermatitis (AD), a pruritic and persistent inflammatory skin disease. The murine model with immunologic phenomena resembling human AD was introduced, which demonstrated skewedness toward predominance of type-2 helper T cell reactivity and pathophysiological changes similar as human AD following 2,4-dinitrochlorobenzene (DNCB) sensitization and challenge...
January 2018: Toxicological Research
https://www.readbyqxmd.com/read/29360238/concentration-of-filaggrin-monomers-its-metabolites-and-corneocyte-surface-texture-in-individuals-with-a-history-of-atopic-dermatitis-and-controls
#5
Kristiane A Engebretsen, Josefine Bandier, Sanja Kezic, Christoph Riethmüller, Niels H H Heegaard, Berit C Carlsen, Allan Linneberg, Jeanne D Johansen, Jacob P Thyssen
BACKGROUND: Atopic dermatitis (AD) is characterized by skin barrier dysfunction. Notably, a high number of nano-scale protrusions on the surface of corneocytes, which can be expressed by the Dermal Texture Index (DTI), was recently associated with pediatric AD, loss-of-function mutations in filaggrin gene (FLG), and reduced levels of natural moisturizing factors (NMF). No study has so far examined the association between these parameters and monomeric filaggrin levels in adults. OBJECTIVE: To determine DTI, monomeric filaggrin and NMF in healthy controls and a group of patients with controlled dermatitis...
January 23, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29353040/eupatilin-an-activator-of-ppar%C3%AE-inhibits-the-development-of-oxazolone-induced-atopic-dermatitis-symptoms-in-balb-c-mice
#6
Yujung Jung, Jin-Chul Kim, No-June Park, Sim-Kyu Bong, Sullim Lee, Hyun Jegal, Li Tai Jin, Sang Moo Kim, Yong Kee Kim, Su-Nam Kim
Eupatilin (5,7-dihydroxy-3',4',6-trimethoxyflavone) is the main lipophilic flavonoid obtained from the Artemisia species. Eupatilin has been reported to have anti-apoptotic, anti-oxidative and anti-inflammatory activities. Previously, we found that eupatilin increases transcriptional activity and expression of peroxisome proliferator-activated receptor α (PPARα) in a keratinocyte cell line and acts as an agonist of PPARα. PPARα agonists ameliorate atopic dermatitis (AD) and restore the skin barrier function...
January 15, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29344612/association-of-disease-severity-with-skin-microbiome-and-filaggrin-gene-mutations-in-adult-atopic-dermatitis
#7
Maja-Lisa Clausen, Tove Agner, Berit Lilje, Sofie M Edslev, Thor Bech Johannesen, Paal Skytt Andersen
Importance: Skin microbiome correlates with disease severity for lesional and nonlesional skin, indicating a global influence of atopic dermatitis (AD). A relation between skin microbiome and filaggrin gene (FLG) mutations proposes a possible association between skin microbiome and host genetics. Objectives: To assess skin and nasal microbiome diversity and composition in patients with AD and compare with healthy controls, and to investigate the microbiome in relation to disease severity and FLG mutations in patients with AD...
January 17, 2018: JAMA Dermatology
https://www.readbyqxmd.com/read/29335340/anticitrullinated-protein-antibodies-induce-inflammatory-gene-expression-profile-in-peripheral-blood-cells-from-ccp-positive-patients-with-ra
#8
Smadar Gertel, Gidi Karmon, Eszter Szarka, Ora Shovman, Esther Houri-Levi, Edna Mozes, Yehuda Shoenfeld, Howard Amital
OBJECTIVE: Anticitrullinated protein antibodies (ACPA) have major diagnostic significance in rheumatoid arthritis (RA). ACPA are directed against different citrullinated antigens, including filaggrin, fibrinogen, vimentin, and collagen. The presence of ACPA is associated with joint damage and extraarticular manifestations, suggesting that ACPA may have a significant role in the pathogenesis of RA. METHODS: To verify the effect of ACPA on RA-immune cells, peripheral blood mononuclear cells (PBMC) from cyclic citrullinated peptide (CCP)-positive patients with RA and healthy controls were cocultured in vitro with ACPA...
January 15, 2018: Journal of Rheumatology
https://www.readbyqxmd.com/read/29322079/fibroblast-and-keratinocyte-gene-expression-following-exposure-to-extracts-of-neem-plant-azadirachta-indica
#9
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://www.readbyqxmd.com/read/29316635/skin-protective-effect-of-epigallocatechin-gallate
#10
Eunji Kim, Kyeonghwan Hwang, Jongsung Lee, Sang Yun Han, Eun-Mi Kim, Junseong Park, Jae Youl Cho
Epigallocatechin gallate (EGCG) is a catechin and an abundant polyphenol in green tea. Although several papers have evaluated EGCG as a cosmetic constituent, the skin hydration effect of EGCG is poorly understood. We aimed to investigate the mechanism by which EGCG promotes skin hydration by measuring hyaluronic acid synthase (HAS) and hyaluronidase (HYAL) gene expression and antioxidant and anti-pigmentation properties using cell proliferation assay, Western blotting analysis, luciferase assay, 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, and reverse transcription polymerase chain reaction (RT-PCR) analysis...
January 6, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29313702/a-comparison-of-scaffold-free-and-scaffold-based-reconstructed-human-skin-models-as-alternatives-to-animal-use
#11
Beste Kinikoglu
Tissue engineered full-thickness human skin substitutes have various applications in the clinic and in the laboratory, such as in the treatment of burns or deep skin defects, and as reconstructed human skin models in the safety testing of drugs and cosmetics and in the fundamental study of skin biology and pathology. So far, different approaches have been proposed for the generation of reconstructed skin, each with its own advantages and disadvantages. Here, the classic tissue engineering approach, based on cell-seeded polymeric scaffolds, is compared with the less-studied cell self-assembly approach, where the cells are coaxed to synthesise their own extracellular matrix (ECM)...
December 2017: Alternatives to Laboratory Animals: ATLA
https://www.readbyqxmd.com/read/29286164/differential-effects-of-wnt5a-on-the-proliferation-differentiation-and-inflammatory-response-of-keratinocytes
#12
Wenming Wang, Xiaoling Yu, Chao Wu, Hongzhong Jin
The predominant role of Wnt family member 5A (Wnt5a) is to induce non-canonical Wnt signalling pathways, including the Wnt‑Ca2+ and Wnt‑planar cell polarity pathways. Enhanced Wnt5a expression is involved in the formation of psoriatic plaques; however, its mechanistic role remains to be determined. In the present study, the effects of Wnt5a expression on HaCaT keratinocytes were investigated. HaCaT cells were cultured in medium supplemented with 0, 40 or 80 ng/ml Wnt5a for 24 h. Cell proliferation, the cell cycle, gene expression and inflammatory responses were investigated using Cell‑Counting Kit‑8 assays, flow cytometry analyses, reverse transcription‑quantitative polymerase chain reaction analyses and enzyme‑linked immunosorbent assays, respectively...
December 27, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29259713/the-etiopathogenesis-of-atopic-dermatitis-barrier-disruption-immunological-derangement-and-pruritus
#13
REVIEW
Pawinee Rerknimitr, Atsushi Otsuka, Chisa Nakashima, Kenji Kabashima
Atopic dermatitis (AD) is a common chronic skin inflammatory disorder characterized by recurrent eczema accompanied by an intractable itch that leads to an impaired quality of life. Extensive recent studies have shed light on the multifaceted pathogenesis of the disease. The complex interplay among skin barrier deficiency, immunological derangement, and pruritus contributes to the development, progression, and chronicity of the disease. Abnormalities in filaggrin, other stratum corneum constituents, and tight junctions induce and/or promote skin inflammation...
2017: Inflammation and Regeneration
https://www.readbyqxmd.com/read/29247241/beneficial-effects-of-melittin-on-ovalbumin-induced-atopic-dermatitis-in-mouse
#14
Woon-Hae Kim, Hyun-Jin An, Jung-Yeon Kim, Mi-Gyeong Gwon, Hyemin Gu, Minji Jeon, Woo Jung Sung, Sang Mi Han, Sok Cheon Pak, Min-Kyung Kim, Kwan-Kyu Park
Atopic dermatitis (AD) is an inflammatory skin disease characterized by intense pruritus and relapsable eczematous lesions. The hallmarks of AD are defects in the epidermal barrier and immunoglobulin E (IgE)-mediated sensitization to several environmental allergens, as well as an immune disorder mediated by an imbalance toward T-helper-2 response. Melittin, a major component of bee venom, has been studied in various inflammatory diseases. However, the beneficial effects of melittin on mouse with AD-like symptoms have not been explored...
December 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29237149/association-of-antibodies-to-citrullinated-protein-antigens-with-blood-pressure-in-first-degree-relatives-of-rheumatoid-arthritis-patients-the-studies-of-the-etiology-of-rheumatoid-arthritis
#15
Jan M Hughes-Austin, Ryan W Gan, Kevin D Deane, Michael H Weisman, M Kristen Demoruelle, Jeremy Sokolove, William H Robinson, V Michael Holers, Jill M Norris, Joachim H Ix
BACKGROUND: Hypertension is more common in patients with rheumatoid arthritis (RA) than in the general population. It is unknown whether hypertension is due to RA-related medications or the disease itself. Therefore, we sought to investigate associations between RA-related autoantibodies, specifically antibodies to citrullinated protein antigens (ACPA) and systolic blood pressure (SBP) and diastolic blood pressure (DBP) in first-degree relatives of RA patients, who were free of RA and RA-related medications...
December 13, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/29221585/physiopathologie-de-la-dermatite-atopique-pathophysiology-of-atopic-dermatits
#16
S Barbarot, H Aubert
Atopic dermatitis is a multifactorial disease due to a combination of genetic and environmental factors. The pathophysiological mechanisms involved in AD are multiple: innate functional abnormality in the skin barrier partly linked to mutations of the filaggrin, a major structural protein of the skin; and genes involved in innate and adaptive immunity; Finally, the model of the hygiene theory has been clarified in recent years: environmental factors alter the diversity of skin and digestive microbiomes, and this diversity seems to play a major role in the development of atopy...
January 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/29183042/expression-and-regulation-of-s100-fused-type-protein-hornerin-at-the-ocular-surface-and-lacrimal-apparatus
#17
Fabian Garreis, Janine Jahn, Katharina Wild, Daniel B Abrar, Martin Schicht, Jens-Michael Schröder, Friedrich Paulsen
Purpose: The S100 fused-type proteins hornerin (HRNR) and filaggrin-2 (FLG2) are members of the epidermal differentiation complex, which is involved in terminal differentiation of keratinocytes via cornification as well as maintenance of the epidermal antimicrobial barrier. We investigated the expression and possible regulation of HRNR and FLG2 at the ocular surface and in the lacrimal apparatus. Methods: Tissues of the lacrimal apparatus and ocular surface were analyzed systematically by means of RT-PCR, immunohistochemistry, and immuntransmission electron microscopy (iTEM) for their ability to express and produce HRNR and FLG2...
November 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29176352/new-science-and-treatment-paradigms-for-atopic-dermatitis
#18
James G Dinulos, Alyssa Trickett, Caroline Crudele
PURPOSE OF THE REVIEW: The prevalence of atopic dermatitis is increasing in industrialized countries for unclear reasons. One theory centers on reduced exposure to microbes during infancy and childhood. Alterations in the epidermal permeability barrier, place certain patients at risk for the immunological dysfunction seen in atopic dermatitis. This review examines current research pertaining to the epidermal permeability barrier, the cutaneous microbiome, and the immunology of atopic dermatitis...
February 2018: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/29166506/is-ki-67-keratin-16-involucrin-and-filaggrin-immunostaining-sufficient-to-diagnose-inflammatory-linear-verrucous-epidermal-nevus-a-report-of-eight-cases-and-a-comparison-with-psoriasis-vulgaris
#19
Jing Peng, Shu-Bin Sun, Pei-Pei Yang, Yi-Ming Fan
Inflammatory linear verrucous epidermal nevus and linear psoriasis are sometimes hard to differentiate clinically and pathologically. Although immunohistochemical expression of keratin 10 (K10), K16, Ki-67, and involucrin may be useful for differentiating both entities, these results have been reported in only a few cases. We collected data from 8 patients with inflammatory linear verrucous epidermal nevus, 11 with psoriasis vulgaris, and 8 healthy controls and evaluated immunohistochemical expression of Ki-67, K16, involucrin, and filaggrin among them...
September 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/29156522/the-prevention-of-tnf-%C3%AE-ifn-%C3%AE-mixture-induced-inflammation-in-human-keratinocyte-and-atopic-dermatitis-like-skin-lesions-in-nc-nga-mice-by-mineral-balanced-deep-sea-water
#20
Kyu-Shik Lee, So-Young Chun, Min-Gu Lee, Soyoung Kim, Tae-Jung Jang, Kyung-Soo Nam
Atopic dermatitis (AD) is a chronic inflammatory skin disease caused by environmental and chemical allergens. Despite the complexity of its pathogenesis, many investigations have shown that substances having anti-inflammatory activities alleviated the pathology of AD. Here, we evaluated the effects of mineral-balanced deep sea water (DSW) on AD-like skin damage in both in vitro and in vivo. The results showed that mineral-balanced DSW regressed inflammatory chemokines, such as macrophage-derived chemokine (MDC), thymus- and activation-regulated chemokine (TARC) and regulated on activation, normal T-cell expressed and secreted (RANTES), and cytokines, interleukin (IL)-6 and granulocyte-macrophage colony-stimulating factor (GM-CSF) mRNA expression in HaCaT immortal human keratinocyte treated with tumor necrosis factor (TNF)-α/ interferon (IFN)-γ mixture...
November 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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