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Inflammatory skin damage

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https://www.readbyqxmd.com/read/29781582/sphingosine-1-phosphate-receptor-1-signaling-maintains-endothelial-cell-barrier-function-and-protects-against-immune-complex-induced-vascular-injury
#1
Nathalie Burg, Steven Swendeman, Stefan Worgall, Timothy Hla, Jane E Salmon
OBJECTIVE: Immune complex (IC) deposition activates neutrophils (PMN), increases vascular permeability and leads to organ damage in SLE and RA. The bioactive lipid sphingosine-1-phosphate (S1P), acting via S1P receptor 1 (S1P1 ), is a key regulator of endothelial cell (EC) barrier function. We hypothesized that augmenting EC integrity via S1P1 signaling would attenuate inflammatory injury mediated by ICs. METHODS: In vitro barrier function was assessed in human umbilical vein endothelial cells (HUVECs) by Electric Cell-substrate Impedance Sensing (ECIS)...
May 21, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29779217/ginsenoside-c-mx-isolated-from-notoginseng-stem-leaf-ginsenosides-attenuates-ultraviolet-b-mediated-photoaging-in-human-dermal-fibroblasts
#2
Xiao-Yi Liu, Eunson Hwang, Bom Park, Hien T T Ngo, Yong-Kun Xiao, Tae-Hoo Yi
Notoginseng is a traditional herbal medicine widely used for medicinal therapy in Asia, as it contains numerous ginsenosides with pharmacological effects. In this study, we submitted Notoginseng stem-leaf (NGL) ginsenosides to an enzyme to create reaction the monomer products of ginsenoside C-Mx and then investigated the ability of ginsenoside C-Mx to protect the skin against ultraviolet B-induced injury in normal human dermal fibroblasts (NHDFs). Ginsenoside C-Mx alleviated UVB-induced intracellular reactive oxygen species (ROS), MMP-1, and IL-6 expression while accelerating TGF-β and procollagen type I secretion...
May 20, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29775616/amelioration-of-uvb-induced-oxidative-stress-and-inflammation-in-fat-1-transgenic-mouse-skin
#3
Hye-Won Yum, Seong Hoon Kim, Jing X Kang, Young-Joon Surh
ω-3 polyunsaturated fatty acids (PUFAs), which are abundant in some fish oils, are known to scavenge lipid peroxyl radicals and increase host immunoresponsiveness. As UVB-induced oxidative stress and inflammation have been implicated in apoptotic cell death, this study was designed to investigate the anti-inflammatory, anti-oxidative, and anti-apoptotic capacity of fat-1 transgenic mice capable of converting ω-6 to ω-3 PUFAs. Wild-type (WT) C57BL/6 mice and fat-1 mice were maintained on the AIN-93 diet supplemented with 10% safflower oil rich in ω-6 PUFAs for 5 weeks...
May 15, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29774542/accelerated-pre-senile-systemic-amyloidosis-in-pacap-knockout-mice-a-protective-role-of-pacap-in-age-related-degenerative-processes
#4
Dora Reglodi, Adel Jungling, Rémi Longuespée, Joerg Kriegsmann, Rita Casadonte, Mark Kriegsmann, Tamas Juhasz, Sebastian Bardosi, Andrea Tamas, Balazs Daniel Fulop, Krisztina Kovacs, Zsuzsanna Nagy, Jason Sparks, Attila Miseta, Gabriel Mazzucchelli, Hitoshi Hashimoto, Attila Bardosi
Dysregulation of neuropeptides may play an important role in aging-induced impairments. Among them, pituitary adenylate cyclase activating polypeptide (PACAP) is a potent cytoprotective peptide that provides an endogenous control against a variety of tissue-damaging stimuli. We hypothesized that the progressive decline of PACAP throughout life, and the well-known general cytoprotective effects of PACAP lead to age-related pathophysiological changes in PACAP deficiency, supported by the increased vulnerability to various stressors of animals partially or totally lacking PACAP...
May 17, 2018: Journal of Pathology
https://www.readbyqxmd.com/read/29760610/the-structure-and-function-of-the-epidermal-barrier-in-patients-with-atopic-dermatitis-treatment-options-part-two
#5
REVIEW
Jagoda Pelc, Magdalena Czarnecka-Operacz, Zygmunt Adamski
Atopic dermatitis (AD) is a chronic and recurrent disease induced by underlying defects of the epidermal barrier and immunological disorders, typical of atopic diseases. The genetic and immunological mechanisms (outlined in the previous paper) affecting the dysfunction of the barrier are intensified by environmental factors, e.g. airborne and food allergens, infections and stress. For this reason, proper skin care, which prevents further damage and restores the epidermal barrier is of such importance in the field of AD therapy...
April 2018: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/29757858/classification-of-foreign-body-reactions-due-to-industrial-silicone-injection
#6
Ago Harlim, Mpu Kanoko, Siti Aisah
BACKGROUND: A foreign body reaction (FBR) is a typical tissue response to a biomaterial that has been injected or implanted in human body tissue. There has been a lack of data on the classification of foreign body reaction to silicone injection, which can describe the pattern of body tissue responses to silicone. OBJECTIVE: Determine the foreign body reaction to silicone injection. METHOD: We modified the classification proposed by Duranti and colleagues, which has categorized a FBR to hyaluronic acid injection into a new classification of an FBR to silicone injection...
April 24, 2018: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29752469/microrna-17-92-cluster-promotes-the-proliferation-and-the-chemokine-production-of-keratinocytes-implication-for-the-pathogenesis-of-psoriasis
#7
Weigang Zhang, Xiuli Yi, Yawen An, Sen Guo, Shuli Li, Pu Song, Yuqian Chang, Shaolong Zhang, Tianwen Gao, Gang Wang, Chunying Li
Keratinocytes are the main epidermal cell type that constitutes the skin barrier against environmental damages, which emphasizes the balance between the growth and the death of keratinocytes in maintaining skin homeostasis. Aberrant proliferation of keratinocytes and the secretion of inflammatory factors from keratinocytes are related to the formation of chronic inflammatory skin diseases like psoriasis. MicroRNA-17-92 (miRNA-17-92 or miR-17-92) is a miRNA cluster that regulates cell growth and immunity, but the role of miR-17-92 cluster in keratinocytes and its relation to skin diseases have not been well investigated...
May 11, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29750958/stat1-activation-represses-il-22-gene-expression-and-psoriasis-pathogenesis
#8
Li Bai, Huihui Fang, Sisi Xia, Ruochan Zhang, Liwu Li, Jordi Ochando, Jiangnan Xu, Yaozhong Ding
IL-22 plays an important role in tissue repair and inflammatory responses, and is implicated in the pathogenesis of psoriasis, ulcerative colitis, as well as liver and pancreas damage. The molecular mechanisms of its regulation have been actively studied. Here, we show that the differential regulation of IL-22 expression in CD4+ T cells by IL-6 and IL-27 was detected rapidly after stimulation. Chromatin immunoprecipitation (ChIP) and luciferase reporter assays demonstrated that both STAT1 and STAT3 directly bind to the STAT responsive elements (SRE) of the IL-22 promoter, and the balance between activated STAT3 and STAT1 determines IL-22 promoter activities...
May 8, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29743809/evaluation-of-regulatory-immune-response-in-skin-lesions-of-patients-affected-by-nonulcerated-or-atypical-cutaneous-leishmaniasis-in-honduras-central-america
#9
Gabriela Venicia Araujo Flores, Carmen Maria Sandoval Pacheco, Thaise Yumie Tomokane, Wilfredo Sosa Ochoa, Concepción Zúniga Valeriano, Claudia Maria Castro Gomes, Carlos Eduardo Pereira Corbett, Marcia Dalastra Laurenti
In Honduras, Leishmania (L.) infantum chagasi causes both visceral leishmaniasis (LV) and nonulcerated or atypical cutaneous leishmaniasis (NUCL). NUCL is characterized by mononuclear inflammatory infiltration of the dermis, composed mainly of lymphocytes followed by macrophages with discrete parasitism. Considering that little is known about the pathogenesis of NUCL, the aim of this study was to evaluate the regulatory response in situ in skin lesions of patients affected by NUCL. Biopsies ( n = 20) from human cutaneous nonulcerative lesions were collected and processed by usual histological techniques...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29743348/humidity-regulated-clca2-protects-the-epidermis-from-hyperosmotic-stress
#10
Kristin Seltmann, Michael Meyer, Jitka Sulcova, Tobias Kockmann, Ulrike Wehkamp, Stephan Weidinger, Ulrich Auf dem Keller, Sabine Werner
Low environmental humidity aggravates symptoms of the inflammatory skin disease atopic dermatitis (AD). Using mice that develop AD-like signs, we show that an increase in environmental humidity rescues their cutaneous inflammation and associated epidermal abnormalities. Quantitative proteomics analysis of epidermal lysates of mice kept at low or high humidity identified humidity-regulated proteins, including chloride channel accessory 3A2 (CLCA3A2), a protein with previously unknown function in the skin. The epidermis of patients with AD, organotypic skin cultures under dry conditions, and cultured keratinocytes exposed to hyperosmotic stress showed up-regulation of the nonorthologous human homolog CLCA2...
May 9, 2018: Science Translational Medicine
https://www.readbyqxmd.com/read/29737899/resveratrol-as-an-active-ingredient-for-cosmetic-and-dermatological-applications-a-review
#11
Anna Ratz-Łyko, Jacek Arct
Resveratrol is now being increasingly used in cosmetology and dermatology. This polyphenolic phytoalexin present in large amounts in red grapes and berries has a number of scientifically proven health-promoting properties associated with a positive effect on the cardiovascular system, lowering the concentration of low-density lipoprotein, and the ability to inhibit the cyclooxygenases activity. Additionally, it has antiproliferative, anti-angiogenic, anti-inflammatory, antioxidant, and antimicrobial properties...
May 8, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29736153/tabetri%C3%A2-tabebuia-avellanedae-ethanol-extract-ameliorates-atopic-dermatitis-symptoms-in-mice
#12
Jae Gwang Park, Young-Su Yi, Sang Yun Han, Yo Han Hong, Sulgi Yoo, Eunji Kim, Seong-Gu Jeong, Adithan Aravinthan, Kwang Soo Baik, Su Young Choi, Jung-Il Kim, Young-Jin Son, Jong-Hoon Kim, Jae Youl Cho
Tabebuia avellanedae has been traditionally used as an herbal remedy to alleviate various diseases. However, the plant's pharmacological activity in allergic and inflammatory diseases and its underlying mechanism are not fully understood. Therefore, we investigated the pharmacological activity of Tabetri ( T. avellanedae ethanol extract (Ta-EE)) in the pathogenesis of AD. Its underlying mechanism was explored using an AD mouse model and splenocytes isolated from this model. Ta-EE ameliorated the AD symptoms without any toxicity and protected the skin of 2,4-dinitrochlorobenzene- (DNCB-) induced AD mice from damage and epidermal thickness...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29734776/an-ointment-consisting-of-the-phage-lysin-lysgh15-and-apigenin-for-decolonization-of-methicillin-resistant-staphylococcus-aureus-from-skin-wounds
#13
Mengjun Cheng, Lei Zhang, Hao Zhang, Xinwei Li, Yanmei Wang, Feifei Xia, Bin Wang, Ruopeng Cai, Zhimin Guo, Yufeng Zhang, Yalu Ji, Changjiang Sun, Xin Feng, Liancheng Lei, Yongjun Yang, Wenyu Han, Jingmin Gu
Staphylococcus aureus ( S. aureus ) is a common and dangerous pathogen that causes various infectious diseases. Skin damage, such as burn wounds, are at high risk of Staphylococcus aureus colonization and infection, which increases morbidity and mortality. The phage lysin LysGH15 exhibits highly efficient lytic activity against methicillin-resistant S. aureus (MRSA) and methicillin-susceptible S. aureus (MSSA) strains. Apigenin (api) significantly decreases haemolysis of rabbit erythrocytes caused by S. aureus and shows anti-inflammatory function...
May 6, 2018: Viruses
https://www.readbyqxmd.com/read/29731194/lipoxin-a4-inhibits-uv-radiation-induced-skin-inflammation-and-oxidative-stress-in-mice
#14
R M Martinez, V Fattori, P Saito, C B P Melo, S M Borghi, I C Pinto, A J C Bussmann, M M Baracat, S R Georgetti, W A Verri, R Casagrande
BACKGROUND: Lipoxin A4 (LXA4 ) is a metabolic product of arachidonic acid. Despite potent anti-inflammatory and pro-resolution activities, it remains to be determined if LXA4 has effect on ultraviolet (UV) radiation-induced skin inflammation. OBJECTIVE: To investigate the effects of systemic administration with LXA4 on UV radiation-induced inflammation and oxidative damage in the skin of mice. METHODS: Varied parameters of inflammation and oxidative stress in the skin of mice were evaluated after UV radiation (4...
April 27, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29729165/modern-specific-features-and-therapy-of-psoriasis-and-arthropathic-psoriasis-courses
#15
Orysya O Syzon, Marianna O Dashko, Ulyana V Fedorova
OBJECTIVE: Introduction:Psoriasis affects about 2% of population. In 30-40% of occurrences arthropathic psoriasis (AP) is diagnosed and it leads to 11-19% of disability cases development. Recent studies have shown that psoriasis is often synergistically combined with herpesvirus of the 1st and 2nd type, which, according to many scientists, determines the severity, frequency of recurrences, and the course of this dermatosis. Recently, new biomarkers, i.e. a system of small ribonucleic microRNA acids, have been described...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29728859/up-regulation-of-hmgb1-and-tlr4-in-skin-lesions-of-lichen-planus
#16
Gabriel Costa de Carvalho, Fabiana Yasumoto Araujo Hirata, Rosana Domingues, Cristina Adelaide Figueiredo, Mariana Colombini Zaniboni, Naiura Vieira Pereira, Mirian Nacagami Sotto, Valéria Aoki, Alberto José da Silva Duarte, Maria Notomi Sato
Lichen planus (LP) is a chronic, mucocutaneous inflammatory disease of an unknown aetiology. The disease has been associated with certain viruses, and the factors such as DAMPs (damage-associated molecular patterns) and PAMPs (pathogen-associated molecular patterns) may also contribute to the inflammatory response in LP. HMGB1 (high mobility group box 1 protein) is one of the major DAMPs that induces inflammation and could trigger LP disease. The present study was aimed to examine TLR4, RAGE and HMGB1 production in epidermis or dermis by immunohistochemistry and the respective expression of these targets in the skin lesions of patients with LP...
May 4, 2018: Archives of Dermatological Research
https://www.readbyqxmd.com/read/29723883/adipose-derived-stem-cells-ameliorates-ischemia-reperfusion-injury-in-a-rat-skin-free-flap-model
#17
Alberto Ballestín, Javier G Casado, Elena Abellán, Francisco Javier Vela, Verónica Álvarez, Alejandra Usón, Rebeca Blázquez, Francisco M Sánchez-Margallo
BACKGROUND:  Ischemia-reperfusion (I/R) injury is inevitable during free tissue transfers. When the period of ischemia exceeds the tissue tolerance, it causes necrosis and flap failure. The aim of this study was to investigate the effects of adipose-derived stem cells (ASCs) embedded in a collagen type I scaffold on the survival of free skin flaps to counteract I/R injury. METHODS:  Left superficial caudal epigastric skin flaps (3 × 6 cm) were performed in 28 Wistar rats that were divided into four groups...
May 3, 2018: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/29710019/-parkinson-s-disease-associated-with-sapho-syndrome-a-case-report
#18
Takashi Ando, Amane Araki, Shinichi Terao, Masahisa Katsuno
A 77-year-old woman with Parkinson's disease presented with left chest pain. Physical examination revealed tenderness at her second left sternocostal joint. There was no skin rash. Chest CT revealed hyperostosis of the sternocostal joint, and cervical MRI showed vertebral osteosclerosis and osteolysis. 99mTc-MDP bone scintigraphy showed an increased activity in the sternocostal joint and vertebral column. The patient was diagnosed with SAHPO syndrome according to the diagnostic criteria. Her chest pain was relieved after oral administration of nonsteroidal anti-inflammatory drugs...
April 28, 2018: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/29705839/stress-and-systemic-inflammation-yin-yang-dynamics-in-health-and-diseases
#19
Qing Yan
Studies in psychoneuroimmunology (PNI) would provide better insights into the "whole mind-body system." Systems biology models of the complex adaptive systems (CASs), such as a conceptual framework of "Yin-Yang dynamics," may be helpful for identifying systems-based biomarkers and targets for more effective prevention and treatment. The disturbances in the Yin-Yang dynamical balance may result in stress, inflammation, and various disorders including insomnia, Alzheimer's disease, obesity, diabetes, cardiovascular diseases, skin disorders, and cancer...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29704879/topical-retinol-attenuates-stress-induced-aging-signs-in-human-skin-ex-vivo-through-egfr-activation-via-egf-but-not-erk-and-ap-1-activation
#20
Bruna Romana-Souza, Welker Silva-Xavier, Andréa Monte-Alto-Costa
Stress-induced oxidative damage and the inflammatory response lead to degradation of collagen and elastic fibers and wrinkle formation. Topical retinol (or vitamin A) can be a strategy to attenuate the effects of stress in skin since it promotes collagen and elastic fiber production and reduces protease synthesis. This study investigated the effect of topical retinol in stressed human skin using in vivo and ex vivo models. Human skin explants were treated with high levels of epinephrine (as observed in stressed patients) and topically with retinol for 13 days...
April 28, 2018: Experimental Dermatology
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