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Archives of Dermatological Research

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https://www.readbyqxmd.com/read/28084540/peroxisome-proliferator-activated-receptor-%C3%AE-ppar%C3%AE-contributes-to-control-of-melanogenesis-in-b16-f10-melanoma-cells
#1
Maja Grabacka, Justyna Wieczorek, Dominika Michalczyk-Wetula, Michel Malinowski, Norbert Wolan, Katarzyna Wojcik, Przemyslaw M Plonka
Recent studies revealed the cooperation between peroxisome proliferator-activated receptor gamma (PPARγ) and α-MSH signaling, which results in enhanced melanogenesis in melanocytes and melanoma cells. However, the agonists of PPARα, such as fenofibrate, exert depigmenting effect. Therefore, we aimed to check how the PPARα expression level affects the antimelanogenic activity of fenofibrate and whether PPARα modulates melanogenesis independently of its agonist. To answer these questions, we used three B16 F10-derived cell lines, which varied in the PPARα expression level and were developed by stable transfection with plasmids driving shRNA-based PPARα silencing or overexpression of PPARα-emerald GFP fusion protein...
January 13, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28078437/senescence-in-the-lesional-fibroblasts-of-non-segmental-vitiligo-patients
#2
Seema Rani, Supriya Bhardwaj, Niharika Srivastava, Vijay Lakshmi Sharma, Davinder Parsad, Ravinder Kumar
Dermal fibroblasts secrete various growth factors which are important for skin pigmentation. Imbalance in the synchronization of epidermal and dermal cells in the skin can play vital role in the pathogenesis of pigmentary disorder vitiligo. Therefore, our objective was to check the lesional fibroblasts for any abnormality and senescence in non-segmental vitiligo patients (NSV). Skin punch biopsies were taken from NSV patients and healthy controls. Explant culture of fibroblast from lesional dermis, non-lesional dermis, and control was analyzed...
January 11, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28013372/mir-21-and-mir-205-are-induced-in-invasive-cutaneous-squamous-cell-carcinomas
#3
Olivera Stojadinovic, Horacio Ramirez, Irena Pastar, Katherine A Gordon, Rivka Stone, Sonal Choudhary, Evangelos Badiavas, Keyvan Nouri, Marjana Tomic-Canic
Cutaneous squamous cell carcinoma (cSCC) is a malignant proliferation of keratinocytes with an uncertain molecular basis causing significant morbidity. MicroRNAs (miRs) are small RNA molecules that regulate gene expression on post- transcriptional level. MiRs are critical to various biological processes. To determine if miRs play a role in pathogenesis of invasive cSCC, we collected patients' specimens from in situ and invasive cSCC (n = 19) and examined miRs expression levels using qPCR. Specifically, we evaluated miR-21, miR-103a, miR-186, miR-200b, miR-203, and miR-205 expression levels due to their role in skin biology and epithelial to mesenchymal transition...
December 24, 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28004279/in-vitro-cultured-fetal-fibroblasts-have-myofibroblast-associated-characteristics-and-produce-a-fibrotic-like-environment-upon-stimulation-with-tgf-%C3%AE-1-is-there-a-thin-line-between-fetal-scarless-healing-and-fibrosis
#4
M Walraven, J J Akershoek, R H J Beelen, M M W Ulrich
Transforming growth factor-β (TGF-β) is a cytokine occurring in three isoforms with an important function in development and wound healing. In wound healing, prolonged TGF-β signaling results in myofibroblast differentiation and fibrosis. In contrast, the developing second-trimester fetal skin contains high levels of all three TGF-β isoforms but still has the intrinsic capacity to heal without scarring. Insight into TGF-β signal transduction during fetal wound healing might lead to methods to control the signaling pathway during adult wound healing...
December 21, 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27988894/increase-in-circulating-sphingosine-1-phosphate-and-decrease-in-ceramide-levels-in-psoriatic-patients
#5
Hanna Myśliwiec, Anna Baran, Ewa Harasim-Symbor, Barbara Choromańska, Piotr Myśliwiec, Anna Justyna Milewska, Adrian Chabowski, Iwona Flisiak
Psoriasis is characterized by hyperproliferation, deregulated differentiation and impaired apoptosis of keratinocytes. Mechanisms of lipid profile disturbances and metabolic syndrome in the psoriatic patients are still not fully understood. Sphingolipids, namely ceramides (CER) and sphingosine-1-phosphate (S1P) are signal molecules which can regulate cell growth, apoptosis and immune reactions. The aim of the study was to evaluate circulating CER and S1P levels in plaque-type psoriasis and their associations with the disease activity, inflammatory or metabolic markers and the presence of psoriatic comorbidities...
December 17, 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27988893/n-acetylglutaminoyl-s-farnesyl-l-cysteine-sig-1191-an-anti-inflammatory-molecule-that-increases-the-expression-of-the-aquaglyceroporin-aquaporin-3-in-human-keratinocytes
#6
José R Fernández, Corey Webb, Karl Rouzard, Michael Voronkov, Kristen L Huber, Jeffry B Stock, Maxwell Stock, Joel S Gordon, Eduardo Perez
Isoprenylcysteine (IPC) small molecules were discovered as signal transduction modulating compounds ~25 years ago. More recently, IPC molecules have demonstrated antioxidant and anti-inflammatory properties in a variety of dermal cells as well as antimicrobial activity, representing a novel class of compounds to ameliorate skin conditions and disease. Here, we demonstrate a new IPC compound, N-acetylglutaminoyl-S-farnesyl-L-cysteine (SIG-1191), which inhibits UVB-induced inflammation blocking pro-inflammatory cytokine interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-α) production...
December 17, 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27988892/immunolocalization-of-substance-p-and-nk-1-receptor-in-vascular-anomalies
#7
Alejandro Ortiz-Prieto, José Bernabeu-Wittel, Teresa Zulueta-Dorado, Ana I Lorente-Lavirgen, Miguel Muñoz
The peptide substance P (SP) shows a widespread distribution in both the central and peripheral nervous systems, but it is also ubiquitous in the human body. After binding to the neurokinin-1 (NK-1) receptor, SP regulates tumoral angiogenesis and proliferation. Thus, knowledge of this system is the key for a better understanding and, hence, a better management of many human diseases, including vascular anomalies (VA). This study aims to examine the expression and localization of both SP and the NK-1 receptor in different vascular anomalies using an immunohistochemical technique...
December 17, 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27988891/investigation-of-36-non-hla-human-leucocyte-antigen-psoriasis-susceptibility-loci-in-a-psoriatic-arthritis-cohort
#8
Zheng Zhang, Jin Yuan, Zhen Tian, Jinhua Xu, Zhong Lu
Psoriasis has been intensively studied recently and numerous risk-associated variants within 44 susceptibility loci have been discovered. Estimates suggest that the genetic contribution to PsA (psoriatic arthritis) may be higher than PsV (psoriasis vulgaris) yet most work has been done on the latter due to its greater population prevalence. To test whether variants in the PsV-associated loci are also related to PsA, we performed a candidate loci association study in Chinese population. Genotyping was performed by MassARRAY platform (Sequenom, San Diego, CA, USA)...
December 17, 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27928683/specific-autoantibodies-in-dermatomyositis-a-helpful-tool-to-classify-different-clinical-subsets
#9
Giulia Merlo, Andrea Clapasson, Emanuele Cozzani, Luigi Sanna, Giampaola Pesce, Marcello Bagnasco, Martina Burlando, Aurora Parodi
Autoantibodies are important in the diagnosis of dermatomyositis. They can be divided in two different groups: myositis-associated autoantibodies (MAA) prevailing in overlap syndromes, and myositis-specific autoantibodies (MSA), with diagnostic specificity exceeding 90%. Our purpose was to detect retrospectively the prevalence of the most common MSAs in a group of 19 adult DM patients (13 women, 6 men). A severe DM (SDM), with extensive cutaneous and muscular manifestations, dysphagia, and sometimes pneumopathy, was detected in ten cases...
December 7, 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27942931/3d-modeling-of-keloid-scars-in-vitro-by-cell-and-tissue-engineering
#10
Dutsadee Suttho, Samlee Mankhetkorn, Delphine Binda, Lionel Pazart, Philippe Humbert, Gwenaël Rolin
Keloids are pathologic scars defined as dermal fibrotic tumors resulting from a disturbance of skin wound healing process. Treatments against keloids are multiple, sometimes empirical and none of them really provides an effective tool for physicians. The lack of effective treatments is correlated with the poor understanding of keloid pathogenesis. To fill this gap, researchers need strong models mimicking keloids as closely as possible. The objective of this study was to establish in vitro a new reconstructed keloid model (RKM), by combining fibroblasts extracted from the three major area of a keloid (center, periphery, non-lesional) in a three-dimensional biomaterial...
January 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27885419/ketoconazole-inhibits-malassezia-furfur-morphogenesis-in-vitro-under-filamentation-optimized-conditions
#11
Sirida Youngchim, Joshua D Nosanchuk, Siriporn Chongkae, Nongnuch Vanittanokom
Malassezia furfur, a constituent of the normal human skin flora, is an etiological agent of pityriasis versicolor, which represents one of the most common human skin diseases. Under certain conditions, both exogenous and endogenous, the fungus can transition from a yeast form to a pathogenic mycelial form. To develop a standardized medium for reproducible production of the mycelial form of M. furfur to develop and optimize susceptibility testing for this pathogen, we examined and characterized variables, including kojic acid and glycine concentration, agar percentage, and pH, to generate a chemically defined minimal medium on which specific inoculums of M...
January 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27878387/genetic-susceptibility-to-cutaneous-radiation-injury
#12
REVIEW
Amy Huang, Sharon A Glick
The use of ionizing radiation is critical to cancer treatment and fluoroscopic procedures. However, despite efforts to minimize total radiation dose, many patients experience toxic cutaneous side-effects of ionizing radiation, ranging from mild erythema to subcutaneous fibrosis, telangiectasia formation, and ulceration. Extent of injury is highly variable among patients. Studying the genetic determinants of radiation injury can help develop protocols to reduce radiation toxicity, as well as drive research into effective modulators of the genes and gene products associated with radiation injury...
January 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27864629/cytokeratin-ae1-ae3-immunostaining-and-3d-histology-improvement-of-diagnosis-in-desmoplastic-squamous-cell-carcinoma-of-the-skin
#13
Katrin Schweinzer, Lukas Kofler, Jürgen Bauer, Gisela Metzler, Helmut Breuninger, Hans-Martin Häfner
Desmoplastic squamous cell carcinoma (DSCC) as a rare subtype of cutaneous SCC has specific histological features, characterized by columns, bands, and strands of squamoid cells infiltrating a dense collagenous stroma. To decrease the high rates of local recurrence in DSSC, improvement of diagnostic methods is highly demanded. Objective was to evaluate whether immunohistochemistry (IHC) is suited to increase diagnostic accuracy. A total number of 18 patients were included in this study. After recutting of the original paraffin blocks, parallel staining of serial sections with conventionally H&E and cytokeratin AE1/AE3-immunohistochemical staining was performed...
January 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27833999/methyl-%C3%AE-cyclodextrin-treatment-combined-to-incubation-with-interleukin-4-reproduces-major-features-of-atopic-dermatitis-in-a-3d-culture-model
#14
Tatiana do Nascimento Pedrosa, Evelyne De Vuyst, Abdallah Mound, Catherine Lambert de Rouvroit, Silvya Stuchi Maria-Engler, Yves Poumay
Atopic dermatitis (AD) skin is characterized by over-expression of interleukin (IL)-4, IL-13 and IL-25. When methyl-β-cyclodextrin (MβCD) treatment preceded exposure to these interleukins, combination of both treatments was found to mimic hallmarks of AD in vitro, such as barrier weakening, histological alterations and typical signaling responses in a reconstructed human epidermis (RHE). However, the respective role of each IL and whether any of them is critical when combined with MβCD treatment was unknown...
January 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27783153/epidermal-hydrogen-peroxide-is-not-increased-in-lesional-and-non-lesional-skin-of-vitiligo
#15
Mohammad Z Zailaie
It is widely believed that the loss of the epidermal melanocytes in vitiligo is basically due to excessive oxidative stress. Previous research work described abnormal elevation of the absolute concentration of the epidermal hydrogen peroxide (H2O2) in lesional and non-lesional skin of vitiligo. Based on this finding, our primary research objective was to use this feature as a screening marker in individuals at a great risk of developing vitiligo. Ninety-six patients of non-segmental vitiligo (NSV) of varying durations, skin phototypes, and treatment modalities (psoralen UVA-, narrow band UVB-treated) were recruited for this study...
January 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27770201/histopathological-and-immunological-changes-during-the-acute-and-recovery-phase-in-henoch-sch%C3%A3-nlein-purpura-rabbit-model
#16
Yanhong Li, Xiaolong Sui, Hua Zhu, Yanfeng Xu, Lan Huang, Yuhuan Xu, Yunlin Han, Xiaochun Feng, Chuan Qin
Henoch-Schönlein purpura (HSP) is a systemic vasculitis mediated by autologous immune complex. Animal models of HSP are scarce. Here, we describe the characteristics of HSP rabbit model in the acute and recovery phase. First, we constructed the HSP rabbit models, and then assessed immunologic indicators of models by enzyme-linked immunosorbent assay and immunoturbidimetry. Histomorphological characteristics were analyzed by haematoxylin-eosin, immunofluorescence and special staining. In the acute stage (24 h) after antigen challenge, the model group rabbits featured skin ecchymosis and abnormal laboratory examination results...
January 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27766406/cd164-identifies-cd4-t-cells-highly-expressing-genes-associated-with-malignancy-in-s%C3%A3-zary-syndrome-the-s%C3%A3-zary-signature-genes-fcrl3-tox-and-mir-214
#17
Bernice M Benoit, Neha Jariwala, Geraldine O'Connor, Landon K Oetjen, Timothy M Whelan, Adrienne Werth, Andrea B Troxel, Hélène Sicard, Lisa Zhu, Christopher Miller, Junko Takeshita, Daniel W McVicar, Brian S Kim, Alain H Rook, Maria Wysocka
Sézary syndrome (SS), a leukemic variant of cutaneous T-cell lymphoma (CTCL), is associated with a significantly shorter life expectancy compared to skin-restricted mycosis fungoides. Early diagnosis of SS is, therefore, key to achieving enhanced therapeutic responses. However, the lack of a biomarker(s) highly specific for malignant CD4(+) T cells in SS patients has been a serious obstacle in making an early diagnosis. We recently demonstrated the high expression of CD164 on CD4(+) T cells from Sézary syndrome patients with a wide range of circulating tumor burdens...
January 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27744497/hyperhidrosis-an-update-on-prevalence-and-severity-in-the-united-states
#18
James Doolittle, Patricia Walker, Thomas Mills, Jane Thurston
Current published estimates of the prevalence of hyperhidrosis in the United States are outdated and underestimate the true prevalence of the condition. The objectives of this study are to provide an updated estimate of the prevalence of hyperhidrosis in the US population and to further assess the severity and impact of sweating on those affected by the condition. For the purposes of obtaining prevalence, a nationally representative sample of 8160 individuals were selected using an online panel, and information as to whether or not they experience hyperhidrosis was obtained...
December 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27744496/the-ikk%C3%AE-dependent-non-canonical-pathway-of-nf-%C3%AE%C2%BAb-activation-is-constitutively-active-and-modulates-progression-related-functions-in-a-subset-of-human-melanomas
#19
Nadin Dewert, Katharina Amschler, Verena Lorenz, Michael P Schön
Owing to activation of several resistance-mediating pathways including NF-κB signaling, metastasized melanoma is almost universally resistant against chemotherapy. Given that blocking of NF-κB either by proteasome-, pan-IKK- or selective IKKβ-inhibitors may increase the susceptibility of melanoma cells to chemotherapy, we have assessed the role of the second kinase within the IKK complex, IKKα. While expression of IKKα and overall activation of NF-κB were heterogeneous, the IKKα-specific p100/p52 processing was detected in a small subset of melanomas (1/9 primary and 1/12 metastatic melanomas) as well as in 1/8 melanoma cell lines...
December 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27722782/low-concentration-hydrogen-peroxide-can-upregulate-keratinocyte-intracellular-calcium-and-par-2-expression-in-a-human-keratinocyte-melanocyte-co-culture-system
#20
Jian Li, Lu-Yan Tang, Wen-Wen Fu, Jin Yuan, You-Yu Sheng, Qin-Ping Yang
Hydrogen peroxide (H2O2) may have a biphasic effect on melanin synthesis and melanosome transfer. High H2O2 concentrations are involved in impaired melanosome transfer in vitiligo. However, low H2O2 concentration promotes the beneficial proliferation and migration of melanocytes. The aim of this study was to explore low H2O2 and its mechanism in melanosome transfer, protease-activated receptor-2 (PAR-2) expression and calcium balance. Melanosomes were fluorescein-labeled for clear visualization of their transfer...
December 2016: Archives of Dermatological Research
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