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https://www.readbyqxmd.com/read/29678305/the-effect-of-cilostazol-a-phosphodiesterase-3-pde3-inhibitor-on-human-hair-growth-with-the-dual-promoting-mechanisms
#1
Hye-In Choi, Dong Young Kim, Soon-Jin Choi, Chang-Yup Shin, Sungjoo Tommy Hwang, Kyu Han Kim, Ohsang Kwon
BACKGROUND: Cilostazol, a phosphodiesterase 3 (PDE3) inhibitor, increases the intracellular level of cyclic adenosine monophosphate to cause vasodilation. Topical application of cilostazol is reported to improve local blood flow and enhance wound healing; however, its effect on human hair follicles is unknown. OBJECTIVE: The purpose of this study was to determine the effect of cilostazol on hair growth. METHODS: We investigated the expression of PDE3 in human dermal papilla cells (DPCs), outer root sheath cells (ORSCs), and hair follicles...
April 11, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29672929/functional-anatomy-of-the-hair-follicle-the-secondary-hair-germ
#2
REVIEW
Andrey A Panteleyev
The secondary hair germ (SHG) - a transitory structure in the lower portion of the mouse telogen hair follicle (HF) - is directly involved in anagen induction and eventual HF regrowth. Some crucial aspects of SHG functioning and ontogenetic relations with other HF parts, however, remain undefined. According to recent evidence (in contrast to previous bulge-centric views), the SHG is the primary target of anagen-inducing signaling and a source of both the outer root sheath (ORS) and ascending HF layers during the initial (morphogenetic) anagen sub-phase...
April 19, 2018: Experimental Dermatology
https://www.readbyqxmd.com/read/29615452/glutamate-transporter-slc1a3-mediates-inter-niche-stem-cell-activation-during-skin-growth
#3
Bettina Reichenbach, Johanna Classon, Tomomi Aida, Kohichi Tanaka, Maria Genander, Christian Göritz
Tissues contain distinct stem cell niches, but whether cell turnover is coordinated between niches during growth is unknown. Here, we report that in mouse skin, hair growth is accompanied by sebaceous gland and interfollicular epidermis expansion. During hair growth, cells in the bulge and outer root sheath temporarily upregulate the glutamate transporter SLC1A3, and the number of SLC1A3+ basal cells in interfollicular epidermis and sebaceous gland increases. Fate mapping of SLC1A3+ cells in mice revealed transient expression in proliferating stem/progenitor cells in all three niches...
April 3, 2018: EMBO Journal
https://www.readbyqxmd.com/read/29605938/establishment-of-dermal-sheath-cell-line-from-cashmere-goat-and-characterizing-cytokeratin-13-as-its-novel-biomarker
#4
Bing Zhu, Zhili Guo, Muzi Jin, Yujuan Bai, Wenliang Yang, Lihua Hui
OBJECTIVE: To establish a dermal sheath cell line, a dermal papilla cell line and a outer root sheath cell line from Cashmere goat and clarify the similarities and differences among them. RESULTS: We established a dermal sheath cell line, a dermal papilla cell line and a outer root sheath cell line from the pelage skin hair follicles of Cashmere goat. The growth rate of dermal sheath cells was intermediate between that of dermal papilla cells and outer root sheath cells...
March 31, 2018: Biotechnology Letters
https://www.readbyqxmd.com/read/29570129/cd34-and-berep4-are-helpful-to-distinguish-basaloid-tricholemmoma-from-basal-cell-carcinoma
#5
Nicholas Turnbull, Waseem Ghumra, Vivek Mudaliar, Josefa Vella, D Scott A Sanders, Saleem Taibjee, Richard Carr
Tricholemmoma, a benign follicular neoplasm with outer root sheath differentiation, typically comprises clear or pale cells, and when multiple is pathognomic of Cowden's syndrome. The tumor is probably underrecognized and in basaloid examples can be difficult to distinguish from basal cell carcinoma (BCC). We studied 55 tricholemmomas (including 15 basaloid cases) and compared immunohistochemical profile with nodular BCC from our archives. Basaloid and non-basaloid tricholemmomas had similar staining characteristics...
March 21, 2018: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/29496358/mitf-m-regulates-melanogenesis-in-mouse-melanocytes
#6
Tianzhi Chen, Bingling Zhao, Yu Liu, Ruiwei Wang, Yujing Yang, Linpei Yang, Changsheng Dong
BACKGROUND: Although the impact of the microphthalamia-associated transcription factor (Mitf) signaling pathway on melanocytes progression has been extensively studied, the specific molecular mechanisms behind MITF-M-enhanced melanin production in melanocytes still need to be clarified. METHODS: In this study, we analyzed the levels of Mitf-M in skin tissues of different coat mice in order to further reveal the relationship between Mitf-M and skin pigmentation. To address the function of Mitf-M on melanogenesis, we have used an overexpression system and combined morphological and biochemical methods to investigate its localization in different coat color mice and pigmentation-related genes' expression in mouse melanocytes...
June 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29436573/malignant-tumor-of-outer-root-sheath-epithelium-trichilemmal-carcinoma-clinical-presentations-treatments-and-outcomes
#7
Mustafa Kürşat Evrenos, Hakan Kerem, Peyker Temiz, Aylin Türel Ermertcan, Levent Yoleri
OBJECTIVES: To emphasize different clinical features of tumor that can be misdiagnosed clinically. METHODS: A total of 8 cases operated between September 2009 and 2016 at the Celal Bayar University, Faculty of Medicine were included in the study. Patients' clinicopathological features, type of surgery and follow up information were evaluated. Results: Six patients were male. The average age was 75.50. The lesions were located on the head and neck, and chest wall...
February 2018: Saudi Medical Journal
https://www.readbyqxmd.com/read/29388354/clinical-and-histopathological-aspects-of-an-alopecia-syndrome-in-captive-andean-bears-tremarctos-ornatus
#8
Amélie Nicolau, Karin Lemberger, Marion Mosca, Antoine Leclerc, Alexis Lécu, Didier Pin
BACKGROUND: Captive Andean bears (Tremarctos ornatus) develop a distinct alopecic syndrome of unknown aetiology. HYPOTHESIS/OBJECTIVES: To describe the histological features of healthy Andean bear skin, to define the clinical and histopathological features of Andean bears with signs of alopecia, and to propose an aetiopathogenesis. ANIMALS: Eighteen healthy Andean bears housed in 12 European zoos and 13 Andean bears with mild to severe alopecia housed in nine European zoos...
January 31, 2018: Veterinary Dermatology
https://www.readbyqxmd.com/read/29320989/expression-of-vimentin-in-hair-follicle-growth-cycle-of-inner-mongolian-cashmere-goats
#9
Nai Rile, Zhihong Liu, Lixia Gao, Jingkai Qi, Meng Zhao, Yuchun Xie, Rui Su, Yanjun Zhang, Ruijun Wang, Jie Li, Hongmei Xiao, Jinquan Li
BACKGROUND: The growth of Inner Mongolian Cashmere goat skin hair follicle exhibits a periodic growth pattern. The hair growth cycle is distinguished as telogen, anagen, and catagen stages. The role of vimentin in the growth process of hair follicles is evident. To elucidate the mechanism underlying the vimentin activity in the growth cycle of hair follicles, transcriptome sequencing and liquid chromatography-tandem mass spectrometry were used to obtain the nucleic acid and amino acid sequences of VIIM gene and vimentin...
January 10, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29184598/-exophytic-tumor-of-the-scalp
#10
Ilhame Naciri, Baderddine Hassam
Proliferating trichilemmal tumor (PTT), still referred to as proliferative trichilemmal cyst (TC), is an uncommon malignant adnexal tumor originating from the cells of the outer root sheath of the hair follicle or, more often, from a trichilemmal cyst, following multiple trauma and/or recurrent inflammation. We report the case of a 64-year old female patient, with no particular previous history, presenting with tumor of the scalp gradually evolving over 18 months. Clinical examination showed a painless, firm, adhering ulcero-budding tumor mass measuring 12 cm along its longer axis at the level of the vertex...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/29174869/expression-characteristics-of-bmp2-bmpr-ia-and-noggin-in-different-stages-of-hair-follicle-in-yak-skin
#11
Liang-Li Song, Yan Cui, Si-Jiu Yu, Peng-Gang Liu, Jun Liu, Xue Yang, Jun-Feng He, Qian Zhang
Bone morphogenetic protein 2 (BMP2), BMP receptor-IA (BMPR-IA), and the BMP2 antagonist Noggin are important proteins involved in regulating the hair follicle (HF) cycle in skin. In order to explore the expression profiles of BMP2, BMPR-IA, and Noggin in the HF cycle of yak skin, we collected adult yak skin in the telogen, proanagen, and midanagen phases of HFs and evaluated gene and protein expression by real-time quantitative polymerase chain reaction (qRT-PCR), western blotting, and immunohistochemistry...
May 1, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29159700/expression-and-distribution-patterns-of-spermine-spermidine-and-putrescine-in-rat-hair-follicle
#12
Yutaro Yamamoto, Takamitsu Makino, Hideo Kudo, Hironobu Ihn, Yasuko Murakami, Senya Matsufuji, Kunio Fujiwara, Masashi Shin
No expression and distribution patterns of polyamines (PAs), spermine, spermidine, and their precursor putrescine in mammalian hair follicle are available, although polyamines are known to correlate well with hair growth and epidermal tumor genesis. Immunohistochemistry (IHC) using our original two monoclonal antibodies (mAbs) ASPM-29 specific for spermine or spermidine, and APUT-32 specific for putrescine allowed us to detect immunoreactivity for polyamines in hair follicles from normal adult rats. A wide range of immunoreactivity for the total spermine and spermidine was observed in the compartments of hair follicle: The highest degree of immunoreactivity for polyamines was observed in the matrix, in the Huxley's layer, in the deeper Henle's layer, and in the cuticle of the inner root sheath/the hair cuticle, while moderate immunoreactivity existed in the lower-to-mid cortex and the companion layer, followed by lower immunoreactivity in the outer root sheath, including the bulge region and in the deeper medulla, in which the immunoreactivity was also evident in their nuclei...
February 2018: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29149771/hoxc13-and-hsp27-expression-in-skin-and-the-periodic-growth-of-secondary-fiber-follicles-from-longdong-cashmere-goats-raised-in-different-production-systems
#13
Jiqing Wang, Ping Yu, Haifang Wang, Yanyu He
This experiment was conducted to identify periodic changes in secondary follicles (SFs) over one year of extensive (grazed) and intensive (housed and fed supplement) farming of Longdong cashmere goats. One-year old goats (n = 24, 12 extensively fed and 12 intensively fed) were studied. The diameter, depth, density, activity, and ultra-structural features of SFs were assessed using light microscopy and transmission electron microscopy. HOXC13 and HSP27 expression were studied using immunohistochemistry and immunofluorescence method...
April 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29123134/divergent-proliferation-patterns-of-distinct-human-hair-follicle-epithelial-progenitor-niches-in-situ-and-their-differential-responsiveness-to-prostaglandin-d2
#14
Talveen S Purba, Michael Peake, Bessam Farjo, Nilofer Farjo, Ranjit K Bhogal, Gail Jenkins, Ralf Paus
Human scalp hair follicles (hHF) harbour several epithelial stem (eHFSC) and progenitor cell sub-populations organised into spatially distinct niches. However, the constitutive cell cycle activity of these niches remains to be characterized in situ. Therefore, the current study has studied these characteristics of keratin 15+ (K15), CD200+ or CD34+ cells within anagen VI hHFs by immunohistomorphometry, using Ki-67 and 5-ethynyl-2'-deoxyuridine (EdU). We quantitatively demonstrate in situ the relative cell cycle inactivity of the CD200+/K15+ bulge compared to other non-bulge CD34+ and K15+ progenitor compartments and found that in each recognized eHFSC/progenitor niche, proliferation associates negatively with eHFSC-marker expression...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29115640/off%C3%A2-target-effect-of-imatinib-and-nilotinib-on-human-vitamin-d3-metabolism
#15
Lysann Kroschwald, Meinolf Suttorp, Josephine Tabea Tauer, Nick Zimmermann, Claudia Günther, Andrea Bauer
Prolonged treatment with tyrosine kinase inhibitors (TKI) including imatinib (IMA) or nilotinib (NIL), induces severe disturbances of bone metabolism in patients with chronic myeloid leukaemia. As vitamin D3 (VD3) is involved in the complex cycle of bone remodelling, the present study investigated in vitro, the influence of IMA and NIL on VD3 metabolism i) in HaCaT cells and ii) in cultured outer root sheath keratinocytes (ORS‑KC) from hair follicles of IMA treated children. Cells were incubated in the presence of IMA or NIL...
January 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29078349/requirement-of-zinc-transporter-zip10-for-epidermal-development-implication-of-the-zip10-p63-axis-in-epithelial-homeostasis
#16
Bum-Ho Bin, Jinhyuk Bhin, Mikiro Takaishi, Koh-Ei Toyoshima, Saeko Kawamata, Kana Ito, Takafumi Hara, Takashi Watanabe, Tarou Irié, Teruhisa Takagishi, Su-Hyon Lee, Haeng-Sun Jung, Sangchul Rho, Juyeon Seo, Dong-Hwa Choi, Daehee Hwang, Haruhiko Koseki, Osamu Ohara, Shigetoshi Sano, Takashi Tsuji, Kenji Mishima, Toshiyuki Fukada
Skin tissues, in particular the epidermis, are severely affected by zinc deficiency. However, the zinc-mediated mechanisms that maintain the cells that form the epidermis have not been established. Here, we report that the zinc transporter ZIP10 is highly expressed in the outer root sheath of hair follicles and plays critical roles in epidermal development. We found that ZIP10 marked epidermal progenitor cell subsets and that ablating Zip10 caused significant epidermal hypoplasia accompanied by down-regulation of the transactivation of p63, a master regulator of epidermal progenitor cell proliferation and differentiation...
November 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29030089/knockdown-of-hif-1%C3%AE-inhibits-the-proliferation-and-migration-of-outer-root-sheath-cells-exposed-to-hypoxia-in-vitro-an-involvement-of-shh-pathway
#17
Haihua Zhang, Weixiao Nan, Xingchao Song, Shiyong Wang, Huazhe Si, Guangyu Li
AIMS: Outer root sheath (ORS) is a highly proliferative component of a hair follicle. This study is performed to investigate whether hypoxia-induced elevation of hypoxia-inducible factor (HIF)-1α, a transcriptional activator, contributes to the outgrowth of ORS cells in vitro. MAIN METHODS: Hair follicles with intact ORS collected from 4-month old male American minks were cultured in normoxic or hypoxic condition (3% oxygen) for 7days. Primary ORS cells isolated from the mink hair follicles were exposed to hypoxia for 12, 24 or 48h, and their proliferation was analyzed with immunofluorescence assay using anti-proliferating cell nuclear antigen (PCNA) antibody...
December 15, 2017: Life Sciences
https://www.readbyqxmd.com/read/28979862/comparison-of-direct-immunofluorescence-of-plucked-hair-and-skin-for-evaluation-of-immunological-remission-in-pemphigus
#18
Reena Rai, Manu V Harikumar
BACKGROUND: Pemphigus is a chronic autoimmune bullous disorder characterized by autoantibodies directed against desmoglein 3 and/or 1. Demonstration of intercellular deposition of IgG on the cell surface of keratinocytes by direct immunofluorescence (DIF) of the skin is the gold standard in the diagnosis of pemphigus. Recently, DIF of plucked hair demonstrating intercellular deposition of IgG in the outer root sheath (ORS) has shown to be useful. OBJECTIVE: To compare the DIF of plucked hair and skin for the evaluation of immunological remission in pemphigus vulgaris patients in clinical remission...
September 2017: Indian Dermatology Online Journal
https://www.readbyqxmd.com/read/28971483/study-of-efficacy-and-safety-of-noncultured-extracted-follicular-outer-root-sheath-cell-suspension-transplantation-in-the-management-of-stable-vitiligo
#19
Pawan Kumar, Neetu Bhari, Manoj K Tembhre, Sujata Mohanty, Sudheer Arava, Vinod K Sharma, Somesh Gupta
BACKGROUND: Noncultured, extracted follicular outer root sheath suspension (NC-EHF-ORS-CS) is a recently introduced technique for the treatment of stable vitiligo. OBJECTIVE: To study the clinical efficacy of this technique and to determine the viability and cell composition of the suspension. METHODS: Twenty-five patients with stable vitiligo were included in this prospective study. Fifty follicles were extracted from occipital scalp and were incubated with trypsin-ethylenediaminetetraacetic acid to separate outer root sheath cells...
February 2018: International Journal of Dermatology
https://www.readbyqxmd.com/read/28960405/expression-of-connexin-43-in-the-human-hair-follicle-emphasis-on-the-connexin-43-protein-levels-in-the-bulge-and-through-the-keratinization-process
#20
Angel Fernandez Flores, Adrian Varela-Vazquez, Maria D Mayan, Eduardo Fonseca
BACKGROUND: Gap junctions form communication compartments between cells. These channels assemble from connexin subunits. OBJECTIVE: To investigate the immunoexpression of connexin 43 (Cx43) in adult human hair follicles. METHODS: Cases were retrospectively obtained from our archives. RESULTS: We identified immunoexpression of Cx43 in the matrix, the papilla, the outer root sheath, the bulge, the medulla, the cortex, the shaft and the secretory part of the sebaceous gland...
January 2018: Journal of Cutaneous Pathology
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