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Outer root sheath

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https://www.readbyqxmd.com/read/28944964/wnt-%C3%AE-catenin-and-erk-pathway-activation-a-possible-mechanism-of-photobiomodulation-therapy-with-light-emitting-diodes-that-regulate-the-proliferation-of-human-outer-root-sheath-cells
#1
Jung E Kim, Young J Woo, Ki M Sohn, Kwan H Jeong, Hoon Kang
BACKGROUND: Outer root sheath cells (ORSCs) play important roles in maintaining hair follicle structure and provide support for the bulge area. The hair growth promoting effects of photobiomodulation therapy (PBMT) have been reported, but the mechanisms for this in human ORCs (hORSCs) have rarely been studied. OBJECTIVE: The aim of this study was to investigate the effect of various wavelengths of light-emitting diode (LED) irradiation on human ORSCs (hORSCs). METHODS: LED irradiation effects on hORSC proliferation and migration were examined with MTT assay, BrdU incorporation assay and migration assays...
September 25, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28939680/mobilizing-transit-amplifying-cell-derived-ectopic-progenitors-prevents-hair-loss-from-chemotherapy-or-radiation-therapy
#2
Wen-Yen Huang, Shih-Fan Lai, Hsien-Yi Chiu, Michael Chang, Maksim Plikus, Chih-Chieh Chan, You-Tzung Chen, Po-Nien Tsao, Tsung-Lin Yang, Hsuan-Shu Lee, Peter Chi, Sung-Jan Lin
Genotoxicity-induced hair loss from chemotherapy and radiotherapy is often encountered in cancer treatment, and there is a lack of effective treatment. In growing hair follicles (HF), quiescent stem cells (SC) are maintained in the bulge region and hair bulbs at the base contain rapidly dividing, yet genotoxicity-sensitive transit-amplifying cells (TAC) that maintain hair growth. How genotoxicity-induced HF injury is repaired remains unclear. We report here that HF mobilize ectopic progenitors from distinct TAC compartments for regeneration in adaptation to the severity of dystrophy induced by ionizing radiation (IR)...
September 22, 2017: Cancer Research
https://www.readbyqxmd.com/read/28914451/pilomatrix-carcinoma-a-10-year-review-of-the-literature
#3
REVIEW
Christopher Jones, Mark Twoon, Weiguang Ho, Mark Portelli, Bernard Robertson, William Anderson
Pilomatrixoma, also known as calcifying epithelioma of Malherbe, is a superficial benign skin tumour arising from hair follicle matrix cells (1,2) usually located in the head or neck region (1). It was first described in 1880 by Malherbe and Chenantais as a calcified epithelioma of sebaceous origin. In 1961, Forbis and Helwig proposed the term pilomatrixoma after establishing that the lesion actually originated from the outer root sheath cell of hair follicles (3-5).
September 15, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28857383/a-human-serum-enriched-medium-formulation-supports-high-viability-and-marker-expression-in-primary-melanocyte-cultures-from-the-outer-root-sheath-and-epidermis
#4
Marie Schneider, Andrea Lohrenz, Michael Cross, Michael C Hacker, Jan C Simon, Vuk Savkovic
Formulating clinically relevant melanocyte cultivation media that maintain the balance between proliferation and maturation to functional melanocytes is a major experimental and regulatory challenge. Within the translation of human melanocytes from the outer root sheath of human hair follicle (HUMORS), we developed a melanocyte medium free of chemical mitogens, chemical melanogenesis enhancers and bovine products, enabling proliferation as well as melanotic differentiation. The formulation involved the replacement of bovine pituitary extract (BPE) and bovine serum (FBS) with human serum (HS) combined with ascorbic acid, CaCl2, epinephrine, L glutamine, insulin and fibroblast growth factor...
August 31, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28849028/panax-ginseng-extract-antagonizes-the-effect-of-dkk%C3%A2-1-induced-catagen-like-changes-of-hair-follicles
#5
Yonghee Lee, Su Na Kim, Yong Deog Hong, Byung Cheol Park, Yongjoo Na
It is well known that Panax ginseng (PG) has various pharmacological effects such as anti-aging and anti-inflammation. In a previous study, the authors identified that PG extract induced hair growth by means of a mechanism similar to that of minoxidil. In the present study, the inhibitory effect of PG extract on Dickkopf-1 (DKK-1)-induced catagen-like changes in hair follicles (HFs) was investigated in addition to the underlying mechanism of action. The effects of PG extract on cell proliferation, anti-apoptotic effect, and hair growth were observed using cultured outer root sheath (ORS) keratinocytes and human HFs with or without DKK-1 treatment...
October 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28809777/pigmented-epithelioid-melanocytoma-pem-animal-type-melanoma-atm-quest-for-an-origin-report-of-one-unusual-case-indicating-follicular-origin-and-another-arising-in-an-intradermal-nevus
#6
Ashley Tarasen, J Andrew Carlson, M Kathryn Leonard, Glenn Merlino, David Kaetzel, Andrzej T Slominski
Pigmented epithelioid melanocytoma (PEM) is a tumor encompassing epithelioid blue nevus of Carney complex (EBN of CNC) and was previously termed animal-type melanoma. Histologically PEMs are heavily pigmented spindled and epithelioid dermal melanocytic tumors with infiltrative borders, however, their origin remains unclear. Stem cells for the epidermis and hair follicle are located in the bulge area of the hair follicle with the potential to differentiate into multiple lineages. Multiple cutaneous carcinomas, including follicular cutaneous squamous cell carcinoma (FSCC), are thought to arise from stem cells in the follicular bulge...
August 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28681425/localization-of-relm-%C3%AE-fizz2-is-associated-with-cementum-formation
#7
Akihiro Hosoya, Akira Takahama, Hiroaki Nakamura
Resistin-like molecule-β/found in inflammatory zone 2 (RELM-β/FIZZ2) is a cysteine-rich secretory protein that is localized in the epithelium of the gastrointestinal tract and lung alveoli. Previous reports have suggested that this protein regulates glucose metabolism and inflammation. In the present study, to analyze the involvement of RELM-β/FIZZ2 in tooth development, we immunohistochemically examined the localization of RELM-β/FIZZ2 in tooth germs of embryonic days (E) 15-20 and postnatal days (P) 7-42 rats...
July 6, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28632917/miniaturization-of-sebaceous-glands-a-novel-histopathological-finding-in-pemphigus-vulgaris-and-pemphigus-foliaceus-of-the-scalp
#8
Marta Sar-Pomian, Joanna Czuwara, Lidia Rudnicka, Malgorzata Olszewska
BACKGROUND: Intraepidermal acantholysis is a characteristic histopathological feature of pemphigus. The histopathology of scalp biopsies in pemphigus has not been widely discussed in the literature, although the scalp is commonly involved in pemphigus. METHODS: A total of 32 consecutive patients with scalp involvement (17 with pemphigus vulgaris [PV] and 15 with pemphigus foliaceus [PF]) were enrolled into the study. The histopathological examination of scalp biopsies was performed in all patients...
June 20, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28632903/immunohistochemical-dissection-of-cystic-panfolliculoma-focusing-on-the-expression-of-multiple-hair-follicle-lineage-markers-with-an-insight-into-the-pathogenesis
#9
Masahiro Fukuyama, Yohei Sato, Yoshimi Yamazaki, Manabu Ohyama
Panfolliculoma (PF) is a rare benign tumor with signs of differentiation toward all components of the hair follicle (HF). Cystic panfolliculoma (CPF) is a subset of PF with histological similarity to trichofolliculoma making the differential diagnosis difficult in some cases. Immunohistopathological investigations of PF have been reported; however, previous studies focused mostly on the expression profile of the outer root sheath markers. Herein, we report a case of CPF. A panel of antibodies was developed and used for the detection of the expression of cytokeratin (CK) 10, CK13, CK14, CK15, hair-hard keratin (AE13) and EpCAM within the lesion, supporting the differentiation of all epithelial lineages of the HF and the diagnosis of CPF...
June 20, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28609346/plaque-like-pilar-sheath-acanthoma-histopathologic-and-immunohistochemical-study-of-3-unusual-cases
#10
Margarita Jo-Velasco, Araceli Corrales-Rodríguez, Laura Francés-Rodríguez, Victoria Alegría-Landa, Itziar Eraña-Tomás, Arno Rütten, Luis Requena
Pilar sheath acanthoma is an uncommon, benign follicular neoplasm that frequently presents as a solitary lesion. This neoplasm usually appears on the skin around the upper lip of elderly patients. Histopathologically, the neoplasm usually shows a cystic configuration with epithelial lobules resembling to those of the outer root sheath of the hair follicle at the level of the isthmus emanating radially from the cyst wall. We present 3 peculiar cases of a pilar sheath acanthoma showing a plaque-like architecture because the lesions exhibited a horizontal configuration...
June 6, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28601433/characterization-of-xenobiotic-metabolizing-enzymes-of-a-reconstructed-human-epidermal-model-from-adult-hair-follicles
#11
Daniel Bacqueville, Carine Jacques, Laure Duprat, Emilien L Jamin, Beatrice Guiraud, Elisabeth Perdu, Sandrine Bessou-Touya, Daniel Zalko, Hélène Duplan
In this study, a comprehensive characterization of xenobiotic metabolizing enzymes (XMEs) based on gene expression and enzyme functionality was made in a reconstructed skin epidermal model derived from the outer root sheath (ORS) of hair follicles (ORS-RHE). The ORS-RHE model XME gene profile was consistent with native human skin. Cytochromes P450 (CYPs) consistently reported to be detected in native human skin were also present at the gene level in the ORS-RHE model. The highest Phase I XME gene expression levels were observed for alcohol/aldehyde dehydrogenases and (carboxyl) esterases...
August 15, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28587354/th1-th2-pb-balance-and-cd200-expression-of-patients-with-active-severe-alopecia-areata
#12
Xinhua Ma, Shisheng Chen, Wanwan Jin, Yu Gao
Th1/Th2 peripheral blood balance and CD200 expression in patients with severe alopecia areata (SAA) in the active stage were investigated. Fifty patients with active SAA, 50 patients with stable SAA and 50 healthy controls were continuously selected and expression of Th1/Th2 of peripheral T lymphocytes, and peripheral B lymphocytes was detected by flow cytometry; RT-PCR was used to detect the expression of the PBMC CD200 mRNA and the expression of CD200 in hair follicles of alopecia area was detected by immunohistochemically staining; ELISA was used to detect expression levels of serum LFN-γ and serum interleukin (IL)-10...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28534946/differentiation-of-nestin%C3%A2-negative-human-hair-follicle-outer-root-sheath-cells-into-neurons-in%C3%A2-vitro
#13
Wei Wu, Xiao-Li Wu, Yu-Qing Ji, Zhen Gao
A specialized quiescent population of hair follicle stem cells, residing in the hair follicle outer root sheath cells (ORSCs), has previously demonstrated pluripotency for differentiation into neural stem cells (NSCs). A previous study indicated that nestin‑positive hair follicle ORSCs are able to differentiate into neurons. However, little has been reported on the isolation of nestin‑negative human ORSCs and whether they can successfully differentiate into neurons in vitro. In the present study, nestin‑positive ORSCs were significantly reduced with a prolonged incubation time in vitro...
July 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28493504/imaging-sonographic-findings-of-in-a-case-of-proliferating-trichilemmal-tumor-of-a-finger-a-case-report
#14
Ki Eon Kwon, Seon-Jeong Kim, Joo Hak Kim, Yoon Yang Jung, Noh Hyuck Park, Ji Yeon Park, Kyung A Kang, Soo Heui Baek
Proliferating trichilemmal tumor (PTT) is a rare tumor that originates from the outer root sheath of a hair follicle. About 90% of PTTs occur on the scalp. The sonographic findings of PTT in the subungual region have not been reported previously. In our case, sonography showed a heterogeneous mass containing echogenic foci with no detectable intratumoral vascularity. These echogenic foci probably represent keratin and cholesterol. © 2017 Wiley Periodicals, Inc. J Clin Ultrasound, 2017.
May 11, 2017: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/28463974/the-histological-characteristics-age-related-thickness-change-of-skin-and-expression-of-the-hsps-in-the-skin-during-hair-cycle-in-yak-bos-grunniens
#15
Xue Yang, Yan Cui, Jing Yue, Honghong He, Chuan Yu, Penggang Liu, Jun Liu, Xiandong Ren, Yun Meng
OBJECTIVE: This experiment was conducted to study the histological characteristics, age-related thickness changes, and expression of HSPs in the skin of yak. METHODS: A total of 20 yaks (10 males and 10 females) were used. Different regions of the normal skin of three different ages (newborn, half-year-old and adult) of yaks were harvested for histological study and thickness measurement. Biopsy samples were taken from the scapula regions of the skin from the same five approximately 1-year-old yaks during the hair cycle (telogen, anagen and catagen)...
2017: PloS One
https://www.readbyqxmd.com/read/28418107/a-new-path-in-defining-light-parameters-for-hair-growth-discovery-and-modulation-of-photoreceptors-in-human-hair-follicle
#16
Serena Buscone, Andrei N Mardaryev, Bianca Raafs, Jan W Bikker, Carsten Sticht, Norbert Gretz, Nilofer Farjo, Natallia E Uzunbajakava, Natalia V Botchkareva
BACKGROUND AND OBJECTIVE: Though devices for hair growth based on low levels of light have shown encouraging results, further improvements of their efficacy is impeded by a lack of knowledge on the exact molecular targets that mediate physiological response in skin and hair follicle. The aim of this study was to investigate the expression of selected light-sensitive receptors in the human hair follicle and to study the impact of UV-free blue light on hair growth ex vivo. MATERIAL AND METHODS: The expression of Opsin receptors in human skin and hair follicles has been characterized using RT-qPCR and immunofluorescence approaches...
September 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28394798/sox10-and-dog1-expression-in-primary-adnexal-tumors-of-the-skin
#17
Cecilia Lezcano, Jonhan Ho, Raja R Seethala
Primary skin adnexal tumors can be challenging to classify and must be discerned from cutaneous adenocarcinoma metastases from various sites. We evaluated expression of Sox10 and DOG1 in normal cutaneous adnexa and in 194 primary skin adnexal tumors, and compared their performance in discriminating primary skin adnexal tumors from cutaneous metastatic adenocarcinomas with that of p40 and p63. In normal skin adnexa, we noted Sox10 expression in both the secretory and myoepithelial cells in eccrine glands, but only in myoepithelial cells in apocrine glands...
March 27, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28350869/in-vitro-skin-models-to-study-epithelial-regeneration-from-the-hair-follicle
#18
Nkemcho Ojeh, Baki Akgül, Marjana Tomic-Canic, Mike Philpott, Harshad Navsaria
The development of dermal equivalents (DEs) for the treatment of burns has contributed toward efficient wound closure. A collagen-glycosaminoglycan DE (C-GAG) grafted with hair follicles converted a full-thickness wound to partial-thickness resulting in complete wound closure and restored hair. In this study we compared the ability of both intact pilosebaceous units (PSU) or truncated hair follicles (THF) to regenerate a multilayered epidermis in vitro when implanted into de-epidermalized dermis (DED) or C-GAG with the epidermis generated in vivo using C-CAG...
2017: PloS One
https://www.readbyqxmd.com/read/28344061/compartmentation-of-mitochondrial-and-oxidative-metabolism-in-growing-hair-follicles-a-ring-of-fire
#19
John J Lemasters, Venkat K Ramshesh, Gregory L Lovelace, John Lim, Graham D Wright, Duane Harland, Thomas L Dawson
Little is known about the energetics of growing hair follicles, particularly in the mitochondrially abundant bulb. Here, mitochondrial and oxidative metabolism was visualized by multiphoton and light sheet microscopy in cultured bovine hair follicles and plucked human hairs. Mitochondrial membrane potential (ΔΨ), cell viability, reactive oxygen species (ROS), and secretory granules were assessed with parameter-indicating fluorophores. In growing follicles, lower bulb epithelial cells had high viability, and mitochondria were polarized...
July 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28329569/linear-trichoepithelioma-on-the-neck-of-a-15-year-old-girl
#20
Amanda J Laska, Roberto A Belli, Todd T Kobayashi
Trichoepitheliomas are trichogenic tumors that can have various clinical morphologies. These tumors are benign and differentiate toward the outer root sheath of the hair follicle. Solitary trichoepitheliomas arise sporadically, in contrast to multiple trichoepitheliomas, which are usually inherited as an autosomal dominant trait or as part of various genetic syndromes. We report a case of an adolescent female with a linear array of trichoepitheliomas on her left neck.
November 15, 2016: Dermatology Online Journal
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