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https://www.readbyqxmd.com/read/29776717/m2-macrophages-promote-wound-induced-hair-neogenesis
#1
Akira Kasuya, Taisuke Ito, Yoshiki Tokura
BACKGROUND: De novo hair regeneration occurs in scars of normal adult mice. This interesting phenomenon is termed as wound-induced hair neogenesis (WIHN). We hypothesized that M2 macrophages are crucially involved in WIHN. OBJECTIVE: To clarify the contribution of M2 macrophages to WIHN. METHOD: We established a mouse model of WIHN. A full thickness skin excision was implemented on the back of C57BL/6 (B6) mice. Newly developing hair follicles were detected by a whole-mount assay...
May 12, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29774387/ultraviolet-radiation-induces-melan-a-expressing-cells-in-interfollicular-epidermis-in-wild-type-mice
#2
David A De Luca, Barbara Sterniczky, Susanne Kimeswenger, Dagmar Födinger, Agatha Schwarz, Thomas Schwarz, Christian Jantschitsch
Adult wild-type mice are not supposed to be proper models for ultraviolet radiation (UVR)-induced melanoma since melanocytes are confined to hair follicles and cannot be sufficiently reached by UVR. On the other hand, in mutated mouse models used for melanoma research limitations, including an altered immune system and selection of affected pathways, lead to tumors phenotypically quite different from naturally occurring melanomas. We compared the distribution of epidermal melanocytes in UVR and not-UVR-exposed wild-type C57BL/6 mice...
May 17, 2018: Archives of Dermatological Research
https://www.readbyqxmd.com/read/29771334/%C3%AE-catenin-activation-in-hair-follicle-dermal-stem-cells-induces-ectopic-hair-outgrowth-and-skin-fibrosis
#3
Yixin Tao, Qingchun Yang, Lei Wang, Jie Zhang, Xuming Zhu, Qianqian Sun, Yunbin Han, Qian Luo, Yushu Wang, Xizhi Guo, Ji Wu, Baojie Li, Xiao Yang, Lin He, Gang Ma
Hair follicle dermal sheath (DS) harbors hair follicle dermal stem cells (hfDSCs), which can be recruited to replenish DS and dermal papilla (DP). Cultured DS cells can differentiate into various cell lineages in vitro. However, it is unclear how its plasticity is modulated in vivo. Wnt/β-catenin signaling plays an important role in maintaining stem cells of various lineages and is required for HF development and regeneration. Here we report that activation of β-catenin in DS generates ectopic HF outgrowth (EF) by reprogramming HF epidermal cells and DS cells themselves, and endows DS cells with hair inducing ability...
May 16, 2018: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/29770335/the-significance-of-scalp-involvement-in-pemphigus-a-literature-review
#4
REVIEW
Marta Sar-Pomian, Lidia Rudnicka, Malgorzata Olszewska
Scalp is a unique location for pemphigus because of the abundance of desmogleins localized in hair follicles. Scalp involvement is observed in up to 60% of patients in the course of pemphigus. The lesions may occasionally lead to alopecia. Unforced removal of anagen hairs in a pull test is a sign of high disease activity. Direct immunofluorescence of plucked hair bulbs is considered a reliable diagnostic method in patients with pemphigus. Follicular acantholysis is a characteristic histopathological feature of pemphigus lesions localized on the scalp...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29769782/graft-versus-host-disease-presenting-as-fibrosing-alopecia-in-a-pattern-distribution-a-model-for-pathophysiological-understanding-of-cicatricial-pattern-hair-loss
#5
Hudson Dutra Rezende, Maria Fernanda Reis Gavazzoni Dias, Ralph Michel Trüeb
A case of cutaneous graft versus host disease (GvHD) presenting as fibrosing alopecia in a pattern distribution (FAPD) is discussed, possibly providing a mechanistic model for a better understanding of the pathogenic events underlying cicatricial pattern hair loss. The implication of a follicular inflammation and fibrosis associated with patterned hair loss has emerged from several independent studies. Eventually, Zinkernagel and Trüeb reported a peculiar type of cicatricial pattern hair loss with histopathological features consistent with lichen planopilaris (LPP) associated with androgenetic alopecia (AGA)...
March 2018: International Journal of Trichology
https://www.readbyqxmd.com/read/29765972/reflectance-confocal-microscopy-as-new-diagnostic-tool-in-folliculotropic-mycosis-fungoides
#6
Gabriella Fabbrocini, Caterina Mazzella, Mariateresa Cantelli, Antonello Baldo, Daniela Russo, Gaetano De Rosa, Giuseppe Monfrecola
We present a case of folliculotropic mycosis fungoides (FMF), a variant of cutaneous T-cell lymphoma which particularly affects hair follicles. FMF can imitate a wide variety of otherwise benign dermatoses, so it poses major diagnostic obstacles both for the dermatologist as well as the dermatopathologist. In our case, in vivo reflectance confocal microscopy (RCM) was very important for guiding the skin biopsy site selection. For this reason, RCM can reduce the number of unsuccessful histopathological examinations and increase the diagnostic accuracy for different skin dermatoses...
April 2018: Skin Appendage Disorders
https://www.readbyqxmd.com/read/29765966/further-clinical-evidence-for-the-effect-of-igf-1-on-hair-growth-and-alopecia
#7
Ralph M Trüeb
Observations on the Laron syndrome originally offered the opportunity to explore the effect of insulin-like growth factor 1 (IGF-1) deficiency on human hair growth and differentiation. According to its expression in the dermal hair papilla, IGF-1 is likely involved in reciprocal signaling. It has been shown to affect follicular proliferation, tissue remodeling, and the hair growth cycle, as well as follicular differentiation, identifying IGF-1 signaling as an important mitogenic and morphogenetic regulator in hair follicle biology...
April 2018: Skin Appendage Disorders
https://www.readbyqxmd.com/read/29765409/a-novel-secretory-vesicle-from-deer-antlerogenic-mesenchymal-stem-cell-conditioned-media-damsc-cm-promotes-tissue-regeneration
#8
Minkoo Seo, Jin-Chul Kim, Hyung-Ki Kim, Eun Wook Choi, Suyeong Jeong, Ki Chang Nam, Mihue Jang
Multipotent stem cells have the capacity to generate terminally differentiated cell types of each lineage; thus, they have great therapeutic potential for a wide variety of diseases. The most widely available stem cells are derived from human tissues, and their use for therapeutic application is limited by their high cost and low productivity. Herein, we report that conditioned media of mesenchymal stem cells (MSCs) isolated from deer antlers enhanced tissue regeneration through paracrine action via a combination of secreted growth factors and cytokines...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29764513/cellular-therapy-with-human-autologous-adipose-derived-adult-cells-of-stromal-vascular-fraction-for-alopecia-areata
#9
Rami Anderi, Nehman Makdissy, Albert Azar, Francine Rizk, Aline Hamade
BACKGROUND: Most common forms of hair loss (alopecia) are caused by aberrant hair follicle cycling and changes in hair follicle morphology. However, current treatments for alopecia do not specifically target these processes. Adipose-derived stromal vascular cells (ADSVCs) that can be harvested from fat cells are one of the latest breakthroughs in the aesthetic field. The potential use of stem cell-based therapies (SCBT) for the repair and regeneration of various tissues and organs offers a paradigm shift that may provide alternative therapeutic solutions, which can be applied to prevent hair loss...
May 15, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29761053/nature-derived-lignan-compound-vb-1-exerts-hair-growth-promoting-effects-by-augmenting-wnt-%C3%AE-catenin-signaling-in-human-dermal-papilla-cells
#10
Jieshu Luo, Mengting Chen, Yingzi Liu, Hongfu Xie, Jian Yuan, Yingjun Zhou, Jinsong Ding, Zhili Deng, Ji Li
Background: Vitexin is a kind of lignan compound which has been shown to possess a variety of pharmacological effects, such as anti-inflammatory, anti-oxidative and anti-cancer activities. However the effect of vitexin on hair regeneration has not been elaborated. Methods: The proliferation of human dermal papilla cells (hDPCs) was examined by cell counting and continuous cell culture after vitexin compound 1 (VB-1) was treated. The expression of lef1 , wnt5a , bmp2 , bmp4 , alpl and vcan was examined by RT-PCR...
2018: PeerJ
https://www.readbyqxmd.com/read/29757849/ocular-surface-findings-in-patients-with-lichen-planopilaris
#11
Mehdi Gheisari, Sahar Dadkhahfar, Kaveh Fadakar, Reza Mahmoud Robati, Hamideh Moravvej, Mohammad Soleimani, Reza Mirshahi
PURPOSE: Lichen planopilaris (LPP) is a chronic lymphocytic- mediated disorder that selectively involves hair follicles, leading to cicatricial alopecia. The eyelash follicle and meibomian gland (MG) might also be involved in the disease process leading to ocular surface problems. METHODS: In this Cross-sectional case -control study, twenty-three patients with histologically confirmed LPP and 23 healthy controls were recruited in this controlled study. To quantify the signs and symptoms of LPP, we used the Lichen Planopilaris Activity Index...
May 10, 2018: Cornea
https://www.readbyqxmd.com/read/29757041/successful-treatment-of-acne-keloidalis-nuchae-with-erbium-yag-laser-a-comparative-study
#12
Hend D Gamil, Elsayed M Khater, Fathia M Khattab, Mona A Khalil
BACKGROUND: Acne keloidalis nuchae (AKN) is a chronic inflammatory disease involving hair follicles of the neck. It is a form of keloidal scarring alopecia that is often refractory to medical or surgical management. OBJECTIVE: To evaluate the efficacy of Er:YAG laser in the treatment of AKN as compared to long pulsed Nd:YAG laser. PATIENTS AND METHODS: This study was conducted on 30 male patients with AKN. Their ages ranged from 19 to 47 years with a mean age of 36...
May 14, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29754201/skin-bioprinting-a-novel-approach-for-creating-artificial-skin-from-synthetic-and-natural-building-blocks
#13
Robin Augustine
Significant progress has been made over the past few decades in the development of in vitro-engineered substitutes that mimic human skin, either as grafts for the replacement of lost skin, or for the establishment of in vitro human skin models. Tissue engineering has been developing as a novel strategy by employing the recent advances in various fields such as polymer engineering, bioengineering, stem cell research and nanomedicine. Recently, an advancement of 3D printing technology referred as bioprinting was exploited to make cell loaded scaffolds to produce constructs which are more matching with the native tissue...
May 12, 2018: Progress in Biomaterials
https://www.readbyqxmd.com/read/29752798/review-of-human-hair-optical-properties-in-possible-relation-to-melanoma-development
#14
Xiyong Huang, Michael D Protheroe, Ahmed M Al-Jumaily, Sharad P Paul, Andrew N Chalmers
Immigration and epidemiological studies provide evidence indicating the correlation of high ultraviolet exposure during childhood and increased risks of melanoma in later life. While the explanation of this phenomenon has not been found in the skin, a class of hair has been hypothesized to be involved in this process by transmitting sufficient ultraviolet rays along the hair shaft to possibly cause damage to the stem cells in the hair follicle, ultimately resulting in melanoma in later life. First, the anatomy of hair and its possible contribution to melanoma development, and the tissue optical properties are briefly introduced to provide the necessary background...
May 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29738529/identifying-novel-strategies-for-treating-human-hair-loss-disorders-cyclosporine-a-suppresses-the-wnt-inhibitor-sfrp1-in-the-dermal-papilla-of-human-scalp-hair-follicles
#15
Nathan J Hawkshaw, Jonathan A Hardman, Iain S Haslam, Asim Shahmalak, Amos Gilhar, Xinhong Lim, Ralf Paus
Hair growth disorders often carry a major psychological burden. Therefore, more effective human hair growth-modulatory agents urgently need to be developed. Here, we used the hypertrichosis-inducing immunosuppressant, Cyclosporine A (CsA), as a lead compound to identify new hair growth-promoting molecular targets. Through microarray analysis we identified the Wnt inhibitor, secreted frizzled related protein 1 (SFRP1), as being down-regulated in the dermal papilla (DP) of CsA-treated human scalp hair follicles (HFs) ex vivo...
May 2018: PLoS Biology
https://www.readbyqxmd.com/read/29736805/isolation-and-cultivation-of-skin-derived-precursors
#16
Xiaoxiao Xiaoxiao, Shiyang Dong, Yaojiong Wu
Skin-derived precursors (SKPs) have been shown recently to be capable of inducing hair genesis and hair follicle regeneration. Here, we describe a protocol for SKP isolation and culture based on our experience and previous publications.
May 8, 2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29731195/urban-particulate-matter-in-air-pollution-penetrates-into-the-barrier-disrupted-skin-and-produces-ros-dependent-cutaneous-inflammatory-response-in-vivo
#17
Seon-Pil Jin, Zhenyu Li, Eun Kyung Choi, Serah Lee, Yoen Kyung Kim, Eun Young Seo, Jin Ho Chung, Soyun Cho
BACKGROUND: Particulate matter (PM) is an integral part of air pollution, which is a mixture of particles suspended in the air. Recently, it has been reported that PM is associated with increased risks of skin diseases, especially atopic dermatitis in children. However, it is unclear if PM directly goes into the skin and what mechanisms are involved in response to PM. OBJECTIVE: To see whether PM could penetrate into the barrier-disrupted skin, produce reactive oxygen species (ROS), and elicit an inflammatory response...
April 30, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29729115/tissue-expression-of-aquaporine-3-in-different-sites-of-vitiligo-an-immunohistochemical-study
#18
S M Esmat, O A Zeid, D M Abdel Halim, M T Fawzy, M Abdel Latif, V Lazarova, M Assaf
The role of epidermal keratinocytes in the pathogenesis of vitiligo has been ignored despite the fact that both melanocytes and keratinocytes form one functional and structural unit. Aquaporin3 (AQP3), a glycerol water channel expressed in epithelial tissue, is involved in the regulation of keratinocyte proliferation, cell migration, and has a potential role in hypopigmentation in vitiligo. Normally, acral skin differs significantly from non-acral skin. Acral skin shows significantly lower hair follicle density, melanocyte density, Langerhans cell (LC) density, epidermal MHCII expression...
May 5, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29725264/generation-of-cashmere-goats-carrying-an-edar-gene-mutant-using-crispr-cas9-mediated-genome-editing
#19
Fei Hao, Wei Yan, Xiaocong Li, Hui Wang, Yingmin Wang, Xiao Hu, Xu Liu, Hao Liang, Dongjun Liu
In recent years, while the use of the clustered regularly interspaced short palindromic repeat (CRISPR)-CRISPR-associated protein 9 (Cas9) (CRISPR-Cas9) system for targeted genome editing has become a research hotspot, it has, to date, not proved adequate for genome editing in large mammals, such as goats. In this study, two opposite single-guide RNAs (sgRNAs) were designed for complete EDAR gene targeting in Cashmere goats, and co-transfected with a plasmid encoding Cas9 into goat fibroblasts. Among the 89 cell lines obtained through the cultivation of clonal cell lines, 62 were positive for EDAR gene targeting...
2018: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/29724829/genome-sequences-of-two-novel-papillomaviruses-isolated-from-healthy-skin-of-pudu-puda-and-cervus-elaphus-deer
#20
Beatriz Mengual-Chuliá, Ulrich Wittstatt, Philipp Olias, Ignacio G Bravo
We report the complete genome sequences of Pudu puda papillomavirus 1 (PpudPV1) and Cervus elaphus papillomavirus 2 (CelaPV2), isolated from healthy skin hair follicles of a Southern pudu and a red deer, respectively. PpudPV1 is basal to the DyokappaPVs, whereas CelaPV2 is basal to the XiPVs (Beta-XiPV crown group).
May 3, 2018: Genome Announcements
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