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https://www.readbyqxmd.com/read/28220862/induction-of-hair-follicle-dermal-papilla-cell-properties-in-human-induced-pluripotent-stem-cell-derived-multipotent-lngfr-thy-1-mesenchymal-cells
#1
Ophelia Veraitch, Yo Mabuchi, Yumi Matsuzaki, Takashi Sasaki, Hironobu Okuno, Aki Tsukashima, Masayuki Amagai, Hideyuki Okano, Manabu Ohyama
The dermal papilla (DP) is a specialised mesenchymal component of the hair follicle (HF) that plays key roles in HF morphogenesis and regeneration. Current technical difficulties in preparing trichogenic human DP cells could be overcome by the use of highly proliferative and plastic human induced pluripotent stem cells (hiPSCs). In this study, hiPSCs were differentiated into induced mesenchymal cells (iMCs) with a bone marrow stromal cell phenotype. A highly proliferative and plastic LNGFR(+)THY-1(+) subset of iMCs was subsequently programmed using retinoic acid and DP cell activating culture medium to acquire DP properties...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211089/icariin-promotes-mouse-hair-follicle-growth-by-increasing-insulin-like-growth-factor-1-expression-in-dermal-papillary-cells
#2
Y-S Su, Z-X Fan, S-E Xiao, B-J Lin, Y Miao, Z-Q Hu, H Liu
BACKGROUND: Icariin is a major flavonoid isolated from Epimedium spp. leaves (Epimedium Herba), and has multiple pharmacological functions, including anti-angiogenesis, anti-oxidant, anti-inflammatory and immunoprotective effects. AIM: To investigate whether icariin can stimulate growth of hair follicles in mice and the underlying mechanism. METHODS: In vitro, the effect of icariin on hair growth was assessed by using a vibrissae hair follicle (VHF) organ-culture model...
February 16, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/28203534/comparison-of-methanol-and-isopropanol-as-wash-solvents-for-determination-of-hair-cortisol-concentration-in-grizzly-bears-and-polar-bears
#3
Thomas Kroshko, Luciene Kapronczai, Marc R L Cattet, Bryan J Macbeth, Gordon B Stenhouse, Martyn E Obbard, David M Janz
Methodological differences among laboratories are recognized as significant sources of variation in quantification of hair cortisol concentration (HCC). An important step in processing hair, particularly when collected from wildlife, is the choice of solvent used to remove or "wash" external hair shaft cortisol prior to quantification of HCC. The present study systematically compared methanol and isopropanol as wash solvents for their efficiency at removing external cortisol without extracting internal hair shaft cortisol in samples collected from free-ranging grizzly bears and polar bears...
2017: MethodsX
https://www.readbyqxmd.com/read/28164458/comparison-of-hair-removal-efficacy-and-side-effect-of-neodymium-yttrium-aluminum-garnet-laser-and-intense-pulsed-light-systems-18-month-follow-up
#4
Georgina Zita Szima, Eszter Anna Janka, Anikó Kovács, Blanka Bortély, Edina Bodnár, Irina Sawhney, Éva Szabó, Éva Remenyik
BACKGROUND: Photothermal destruction of hair shaft melanin with intense pulsed light (IPL) and neodymium:yttrium-aluminum-garnet (Nd:YAG) laser has become an effective treatment of hair removal. AIMS: Our aim was to compare efficacy, satisfactory levels, safety, and side effects of Nd:YAG and IPL in hair reduction. METHODS: This was a prospective randomized intrapatient, right-left, assessor-blinded comparison of Nd:YAG vs IPL. There were 38 volunteers recruited...
February 6, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28155238/dickkopf-1-is-involved-in-dexamethasone-mediated-hair-follicle-regression
#5
Mi Hee Kwack, Jun Ho Lee, Chang Hoon Seo, Jung Chul Kim, Moon Kyu Kim, Young Kwan Sung
The stress-related neurohormones including glucocorticoids (GCs) are secreted by hair follicles (HFs) and GCs suppress murine hair growth in vivo. In this study, we found that dexamethasone (Dex), a synthetic GC, increased the expression of dickkopf-1 (DKK1), a known catagen inducer, in dermal papilla (DP) cells but not in follicular keratinocytes. The neutralizing DKK1 antibody significantly attenuated the Dex-induced inhibition of human hair shaft elongation. In addition, the neutralizing Dkk1 antibody delayed Dex-induced catagen in mice...
February 3, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28099203/evaluation-of-gene-expression-patterns-in-micrografts-demonstrate-induction-of-catagen-like-processes-during-storage
#6
Walter Krugluger, Karl Stiefsohn, Karl Moser, Claudia Moser, Katarina Laciak
BACKGROUND: Alterations of gene expression patterns may contribute to the commonly observed transient reduction of hair shaft elongation in hair restoration surgery. OBJECTIVE: To elucidate the molecular causes, we evaluated changes in gene expression patterns in hair follicle micrografts during storage. MATERIALS AND METHODS: Micrografts with different amounts of adjacent connective tissue (regular, skinny, and chubby) were stored for different periods, and the expression of key genes was determined: dermal papilla (DP): FGF7, alkaline phosphatase (ALP), versican; outer root sheath: Krt15; inner root sheath: Krt 25; cuticula: Krt85; Henle layer: filaggrin; genes related to apoptosis and growth/differentiation: Caspase 3, Ovol1, and Foxo1...
February 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28078444/mps-analysis-of-the-mtdna-hypervariable-regions-on-the-miseq-with-improved-enrichment
#7
Mitchell M Holland, Laura A Wilson, Sarah Copeland, Gloria Dimick, Charity A Holland, Robert Bever, Jennifer A McElhoe
The non-coding displacement (D) loop of the human mitochondrial (mt) genome contains two hypervariable regions known as HVR1 and HVR2 that are most often analyzed by forensic DNA laboratories. The massively parallel sequencing (MPS) protocol from Illumina (Human mtDNA D-Loop Hypervariable Region protocol) utilizes four sets of established PCR primer pairs for the initial amplification (enrichment) step that span the hypervariable regions. Transposase adapted (TA) sequences are attached to the 5'-end of each primer, allowing for effective library preparation prior to analysis on the MiSeq, and AmpliTaq Gold DNA polymerase is the enzyme recommended for amplification...
January 11, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28074524/trichoscopic-clues-for-diagnosis-of-alopecia-areata-and-trichotillomania-in-asians
#8
Saranya Khunkhet, Vasanop Vachiramon, Poonkiat Suchonwanit
BACKGROUND: Trichoscopy has become a useful diagnostic tool for various hair and scalp diseases, including alopecia areata (AA) and trichotillomania (TTM), which are sometimes difficult to distinguish clinically. OBJECTIVES: To describe trichoscopic findings of AA and TTM in an Asian population and to establish diagnostic clues for these conditions. METHODS: Trichoscopy was performed with a handheld dermoscope in 52 patients diagnosed with AA and 23 patients diagnosed with TTM...
February 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/27976432/trichobacteriosis-axillaris-caused-by-dermabacter-hominis
#9
Jorge Larrondo, Lorena Porte, Marianne Gosch, Raúl Cabrera, Thomas Weitzel
Trichobacteriosis is a frequent superficial bacterial infection of the hair, mainly affecting sweat gland bearing areas such as axillae and genital region, and also rarely the scalp.(1-3) The disease is characterized by bacterial overgrowth forming nodular concretions, usually of yellow color (infrequently black or reddish), which are firmly attached to the hair shaft.(1,4) Clinical hallmarks are rancid, acidic odor, unpleasant "dirty" sensation, and staining of clothes. Although most cases have been associated to different species of corynebacteria, the full etiologic spectrum of this infection is uncertain ...
December 15, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27939460/exploring-the-brain-skin-connection-leads-and-lessons-from-the-hair-follicle
#10
R Paus
Research into how the central nervous system (CNS) and the skin of mammals are physiologically connected and how this "brain-skin connection" may be therapeutically targeted in clinical medicine has witnessed a renaissance. A key element in this development has been the discovery that mammalian skin and its appendages, namely human scalp hair follicles (HFs), not only are important, long-underestimated target tissues for classical neurohormones, neurotrophins and neuropeptides, but also are eminent peripheral tissue sources for the production and/or release of these neuromediators...
October 2016: Current Research in Translational Medicine
https://www.readbyqxmd.com/read/27925662/clinical-and-pathological-features-of-hair-coat-abnormalities-in-curly-coated-retrievers-from-uk-and-sweden
#11
R Bond, K Varjonen, A Hendricks, Y M Chang, H Brooks Brownlie
OBJECTIVES: To gain information on hair loss amongst curly coated retrievers by questionnaire and to define the clinical and pathological features of hair coat abnormalities in affected dogs in the United Kingdom and Sweden. MATERIALS AND METHODS: Questionnaires were completed by members of the Curly Coated Retriever Clubs. Fourteen dogs (six in the United Kingdom, eight in Sweden) were clinically examined and skin/hair samples collected for microscopy and histopathology...
December 2016: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/27882597/morphological-analyses-in-fragility-of-pili-torti-with-bj%C3%A3-rnstad-syndrome
#12
Yuki Marubashi, Takeshi Yanagishita, Jun Muto, Nobuhiko Taguchi, Kazumitsu Sugiura, Yoshiyuki Kawamoto, Masashi Akiyama, Daisuke Watanabe
Pili torti is an extremely rare hair phenotype characterized by short length of hairs with hair shafts being easily broken. However, the mechanism of fragility in pili torti is unclear. In this study, we examined the underlying morphological features responsible for pili torti formation using transmission electron microscopy (TEM). We used pili torti samples from a patient with Björnstad syndrome and normal hairs from a healthy subject as a comparison. The macroscopic morphological features of the samples agreed with the results of a previous study showing that pili torti is twisted, flattened, thin and with partial trichorrhexis...
November 24, 2016: Journal of Dermatology
https://www.readbyqxmd.com/read/27866708/mutations-in-three-genes-encoding-proteins-involved-in-hair-shaft-formation-cause-uncombable-hair-syndrome
#13
F Buket Ü Basmanav, Laura Cau, Aylar Tafazzoli, Marie-Claire Méchin, Sabrina Wolf, Maria Teresa Romano, Frederic Valentin, Henning Wiegmann, Anne Huchenq, Rima Kandil, Natalie Garcia Bartels, Arzu Kilic, Susannah George, Damian J Ralser, Stefan Bergner, David J P Ferguson, Ana-Maria Oprisoreanu, Maria Wehner, Holger Thiele, Janine Altmüller, Peter Nürnberg, Daniel Swan, Darren Houniet, Aline Büchner, Lisa Weibel, Nicola Wagner, Ramon Grimalt, Anette Bygum, Guy Serre, Ulrike Blume-Peytavi, Eli Sprecher, Susanne Schoch, Vinzenz Oji, Henning Hamm, Paul Farrant, Michel Simon, Regina C Betz
Uncombable hair syndrome (UHS), also known as "spun glass hair syndrome," "pili trianguli et canaliculi," or "cheveux incoiffables" is a rare anomaly of the hair shaft that occurs in children and improves with age. UHS is characterized by dry, frizzy, spangly, and often fair hair that is resistant to being combed flat. Until now, both simplex and familial UHS-affected case subjects with autosomal-dominant as well as -recessive inheritance have been reported. However, none of these case subjects were linked to a molecular genetic cause...
December 1, 2016: American Journal of Human Genetics
https://www.readbyqxmd.com/read/27837565/cryopreservation-of-hair-follicle-associated-pluripotent-hap-stem-cells-maintains-differentiation-and-hair-growth-potential
#14
Robert M Hoffman, Satoshi Kajiura, Wenluo Cao, Fang Liu, Yasuyuki Amoh
Hair follicles contain nestin-expressing pluripotent stem cells which originate above the bulge area of the follicle, below the sebaceous gland. We have termed these cells hair follicle-associated pluripotent (HAP) stem cells. We have established efficient cryopreservation methods of the hair follicle that maintain the pluripotency of HAP stem cells as well as hair growth. We cryopreserved the whole hair follicle by slow-rate cooling in TC-Protector medium or in DMSO-containing medium and storage in liquid nitrogen or at -80 °C...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27766696/clinical-ultrasonographic-and-arthroscopic-characteristics-of-hair-shafts-within-synovial-structures-of-seven-horses
#15
Jessica L Partlow, Meghann Lustgarten, W Rich Redding
To the authors' knowledge, the ultrasonographic appearance of hair shafts within a synovial structure of the horse has not been described previously. The purpose of this descriptive study was to illustrate the clinical, ultrasonographic, and arthroscopic characteristics of confirmed hair shafts within synovial structures of seven horses. A review of medical records of the Farm and Equine Veterinary Medical Center at North Carolina State University College of Veterinary Medicine identified seven horses with clinical signs suspicious for inflammatory or septic synovitis/tenosynovitis that had hair shafts identified within those structures ultrasonographically...
January 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/27746630/isolation-and-quantification-of-glycosaminoglycans-from-human-hair-shaft
#16
Eleni Maniatopoulou, Stefanos Bonovas, Nikolaos Sitaras
BACKGROUND: There is evidence that glycosaminoglycans (GAGs) are present in the hair shaft within the follicle but there are no studies regarding GAGs isolation and measurement in the human hair shaft over the scalp surface, it means, in the free hair shaft. OBJECTIVE: The purpose of our research was to isolate and measure the total GAGs from human free hair shaft. METHODS: Seventy-five healthy individuals participated in the study, 58 adults, men and women over the age of 50 and 17 children (aged 4~9)...
October 2016: Annals of Dermatology
https://www.readbyqxmd.com/read/27741315/a-high-yield-two-hour-protocol-for-extraction-of-human-hair-shaft-proteins
#17
Sing Ying Wong, Ching Chin Lee, Ali Ashrafzadeh, Sarni Mat Junit, Nazirahanie Abrahim, Onn Haji Hashim
Proteome analysis of the human hair remains challenging due to the poor solubility of hair proteins and the difficulty in their extraction. In the present study, we have developed a rapid extraction protocol for hair shaft protein using alkaline-based buffer. The new protocol accelerated the procedure by reducing the extraction time from at least a day to less than two hours and showed a protein recovery of 47.3 ± 3.72%. Further analyses of the extracted protein sample through sodium dodecyl sulfate polyacrylamide gel electrophoresis and Quadrupole-time-of-flight mass spectrometry analysis unveiled a total of 60 proteins, including 25 that were not previously reported...
2016: PloS One
https://www.readbyqxmd.com/read/27718775/breaking-the-cycle-of-hair-breakage-pearls-for-the-management-of-acquired-trichorrhexis-nodosa
#18
Alessandra Haskin, Shawn G Kwatra, Crystal Aguh
Acquired trichorrhexis nodosa is a common cause of hair loss for patients of all ethnicities. It is especially prevalent in black patients with tightly curled hair types and can present unique diagnostic and therapeutic challenges due to structural differences in these hair types and the combination of various hair care and styling practices that contribute to hair damage. While scalp biopsies can help rule out other etiologies of hair loss, there is a paucity of histologic findings in acquired trichorrhexis nodosa, making this primarily a clinical diagnosis...
October 10, 2016: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/27676122/two-photon-microscopy-for-intracutaneous-imaging-of-stem-cell-activity-in-mice
#19
REVIEW
Sixia Huang, Panteleimon Rompolas
The adult skin is a typical example of a highly regenerative tissue. Terminally differentiated keratinocytes are shed from the external layers of the epidermis or extruded from the skin as part of the growing hair shaft on a daily basis. These are effectively replenished through the activity of skin-resident stem cells. Precise regulation of stem cell activity is critical for normal skin homoeostasis or wound healing and irregular stem cell proliferation or differentiation can lead to skin disease. The scarcity and dynamic nature of stem cells presents a major challenge for elucidating their mechanism of action...
September 27, 2016: Experimental Dermatology
https://www.readbyqxmd.com/read/27651556/acute-poisoning-in-a-child-following-topical-treatment-of-head-lice-pediculosis-capitis-with-an-organophosphate-pesticide
#20
Muddathir H Hamad, Ahmed Awad Adeel, Ali Abdu N Alhaboob, Ahmed M Ashri, Mustafa A Salih
This is a case report of acute organophosphate poisoning in a child treated with topical application of Diazinon-60 (WHO Class II toxicity) for head lice (pediculosis capitis). The patient presented with neurological symptoms and signs. After emergency respiratory and circulatory resuscitation the patient underwent dermal decontamination and was treated with atropine, high flow oxygen and pralidoxime. Scanning electron micrographs of scalp hair specimens revealed both viable and empty head lice nits (lice eggs that attach to the hair shaft)...
2016: Sudanese Journal of Paediatrics
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