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https://www.readbyqxmd.com/read/28512199/dominant-negative-sox18-function-inhibits-dermal-papilla-maturation-and-differentiation-in-all-murine-hair-types
#1
Rehan Villani, Samantha Hodgson, Julien Legrand, Jessica Greaney, Ho Yi Wong, Cathy Pichol-Thievend, Christelle Adolphe, Brandon Wainwight, Mathias Francois, Kiarash Khosrotehrani
SOX family proteins SOX2 and SOX18 have been reported as being essential in determining hair follicle type; however, the role they play during development remains unclear. Here, we demonstrate that Sox18 regulates the normal differentiation of the dermal papilla of all hair types. In guard (primary) hair dermal condensate (DC) cells, we identified transient Sox18 in addition to SOX2 expression at E14.5, which allowed fate tracing of primary DC cells until birth. Similarly, expression of Sox18 was detected in the DC cells of secondary hairs at E16...
May 15, 2017: Development
https://www.readbyqxmd.com/read/28504397/hair-follicle-dermal-papilla-and-sheath-fibroblasts-provide-a-supportive-microenvironment-for-human-skin-regeneration
#2
P Kaur
No abstract text is available yet for this article.
May 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28497393/effect-of-miscanthus-sinensis-var-purpurascens-flower-extract-on-proliferation-and-molecular-regulation-in-human-dermal-papilla-cells-and-stressed-c57bl-6-mice
#3
GiHee Jeong, William A Boisvert, Mei-Zhu Xi, Yi-Lin Zhang, Young-Bin Choi, Sunghun Cho, Sanghyun Lee, Changsun Choi, Bog-Hieu Lee
OBJECTIVES: To investigate the hair growth-promoting effect of Miscanthus sinensis var. purpurascens (MSP) flower extracton on in vitro and in vivo models. METHODS: MSP flower extract was extracted in 99.9% methanol and applied to examine the proliferation of human dermal papilla cells (hDPCs) in vitro at the dose of 3.92-62.50 μg/mL and hair growth of C57BL/6 mice in vivo at the dose of 1000 μg/mL. The expression of transforming growth factor β1 (TGF-β1), hepatocyte growth factor (HGF), β-catenin, substance P was measured by relative quantitative realtime polymerase chain reaction...
May 11, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28475144/undariopsis-peterseniana-promotes-hair-growth-by-the-activation-of-wnt-%C3%AE-catenin-and-erk-pathways
#4
Jung-Il Kang, Min-Kyoung Kim, Ji-Hyeok Lee, You-Jin Jeon, Eun-Kyoung Hwang, Young-Sang Koh, Jin-Won Hyun, Soon-Young Kwon, Eun-Sook Yoo, Hee-Kyoung Kang
In this study, we investigated the effect and mechanism of Undariopsis peterseniana, an edible brown alga, on hair growth. The treatment of vibrissa follicles with U. peterseniana extract ex vivo for 21 days significantly increased the hair-fiber lengths. The U. peterseniana extract also significantly accelerated anagen initiation in vivo. Moreover, we found that U. peterseniana extract was able to open the KATP channel, which may contribute to increased hair growth. The U. peterseniana extract decreased 5α-reductase activity and markedly increased the proliferation of dermal papilla cells, a central regulator of the hair cycle...
May 5, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28458974/various-types-of-minor-trauma-to-hair-follicles-during-follicular-unit-extraction-for-hair-transplantation
#5
Jae Hyun Park, Seung Hyun You
BACKGROUND: When performing follicular unit extraction (FUE), various types of minor hair follicle trauma unapparent during follicular unit strip surgery are likely to occur. However, no studies have examined such damage. METHODS: In total, 100 grafts were randomly selected from each of 42 patients who underwent FUE with a 1-mm-diameter sharp punch. A ×5.5 magnifying loupe and a ×60 magnifying binocular microscope were used. The transection rate (TR), paring, fractures of and damage to the dermal papilla (DP) areas, and hair bulb partial injury were assessed...
March 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28450835/bioactives-in-chinese-proprietary-medicine-modulates-5%C3%AE-reductase-activity-and-gene-expression-associated-with-androgenetic-alopecia
#6
Justin J Y Tan, Jing Pan, Lihan Sun, Junying Zhang, Chunyong Wu, Lifeng Kang
Androgenetic alopecia (AGA) is characterized by a progressive and patterned transformation of thick, pigmented terminal scalp hairs into short, hypo-pigmented vellus-like hairs. The use of Minoxidil and Finasteride to treat AGA are often associated with complications in safety and efficacy. However, herbal remedies are deemed to have lesser side effects in many societies. This study aims to identify potential hair growth properties of individual compounds from a Chinese proprietary medicine known as Yangxue Shengfa capsule (YSC), used in China for many years for improving AGA...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28447350/dermoscopy-pathology-relationship-in-seborrheic-keratosis
#7
REVIEW
Akane Minagawa
Making a definitive diagnosis of seborrheic keratosis (SK) can be challenging for the naked eye due to its wide variation in clinical features. Fortunately, however, most cases of SK exhibit the typical dermoscopic findings of fissures and ridges, hairpin vessels with white halo, comedo-like openings, and milia-like cysts, all of which are helpful to distinguish SK from melanoma, melanocytic nevus, squamous cell carcinoma, basal cell carcinoma (BCC) and other skin tumors. Histopathologically, these dermoscopic characteristics correspond to papillomatous surface of the epidermis, enlarged capillaries of the dermal papillae, pseudohorn cysts in the epidermis opened to the surface of the lesion and intraepidermal cysts, respectively...
May 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28446767/two-photon-autofluorescence-lifetime-imaging-of-human-skin-papillary-dermis-in-vivo-assessment-of-blood-capillaries-and-structural-proteins-localization
#8
Evgeny A Shirshin, Yury I Gurfinkel, Alexander V Priezzhev, Victor V Fadeev, Juergen Lademann, Maxim E Darvin
The papillary dermis of human skin is responsible for its biomechanical properties and for supply of epidermis with chemicals. Dermis is mainly composed of structural protein molecules, including collagen and elastin, and contains blood capillaries. Connective tissue diseases, as well as cardiovascular complications have manifestations on the molecular level in the papillary dermis (e.g. alteration of collagen I and III content) and in the capillary structure. In this paper we assessed the molecular structure of internal and external regions of skin capillaries using two-photon fluorescence lifetime imaging (FLIM) of endogenous compounds...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28445731/hair-follicle-terminal-differentiation-is-orchestrated-by-distinct-early-and-late-matrix-progenitors
#9
Arlee L Mesler, Natalia A Veniaminova, Madison V Lull, Sunny Y Wong
During development and regeneration, matrix progenitors undergo terminal differentiation to form the concentric layers of the hair follicle. These differentiation events are thought to require signals from the mesenchymal dermal papilla (DP); however, it remains unclear how DP-progenitor cell interactions govern specific cell fate decisions. Here, we show that the hair follicle differentiated layers are specified asynchronously, with early matrix progenitors initiating differentiation before surrounding the DP...
April 25, 2017: Cell Reports
https://www.readbyqxmd.com/read/28442778/as-a-carrier-transporter-for-hair-follicle-reconstitution-platelet-rich-plasma-promotes-proliferation-and-induction-of-mouse-dermal-papilla-cells
#10
Shun-E Xiao, Yong Miao, Jin Wang, Wei Jiang, Zhe-Xiang Fan, Xiao-Min Liu, Zhi-Qi Hu
Morphogenesis of hair follicles during development and in hair reconstitution assays involves complex interactions between epithelial cells and dermal papilla cells (DPCs). DPCs may be a source of cells for hair regeneration in alopecia patients. Reconstitution of engineered hair follicles requires in vitro culture of trichogenic cells, a three-dimensional scaffolds, and biomolecular signals. However, DPCs tend to lose their biological activity when cultured as trichogenic cells, and scaffolds currently used for hair follicle regeneration lack biological efficiency and biocompatibility...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28419120/structural-and-functional-changes-in-the-microcirculation-of-lepromatous-leprosy-patients-observation-using-orthogonal-polarization-spectral-imaging-and-laser-doppler-flowmetry-iontophoresis
#11
Curt Treu, Maria das Graças Coelho de Souza, Omar Lupi, Fernando Lencastre Sicuro, Priscila Alves Maranhão, Luiz Guilherme Kraemer-Aguiar, Eliete Bouskela
Leprosy is a chronic granulomatous infection of skin and peripheral nerves caused by Mycobacterium leprae and is considered the main infectious cause of disability worldwide. Despite the several studies regarding leprosy, little is known about its effects on microvascular structure and function in vivo. Thus, we have aimed to compare skin capillary structure and functional density, cutaneous vasomotion (spontaneous oscillations of arteriolar diameter), which ensures optimal blood flow distribution to skin capillaries) and cutaneous microvascular blood flow and reactivity between ten men with lepromatous leprosy (without any other comorbidity) and ten age- and gender-matched healthy controls...
2017: PloS One
https://www.readbyqxmd.com/read/28418608/methods-for-the-isolation-and-3d-culture-of-dermal-papilla-cells-from-human-hair-follicles
#12
H Topouzi, N J Logan, G Williams, C A Higgins
The dermal papilla is a cluster of mesenchymal cells located at the base of the hair follicle which have a number of important roles in the regulation of hair growth. As a consequence, in vitro models of these cells are widely used to study the molecular mechanisms which underlie hair follicle induction, growth and maintenance. While dermal papilla from rodent hair follicles can be digested prior to cell isolation, the unique extracellular matrix composition found in human dermal papilla renders enzymes such as trypsin and collagenase insufficient for digestion of the dermal papilla into a single cell suspension...
April 18, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28377365/-research-progress-of-skin-derived-precursor-cells
#13
Ruo-Si Chen, Yong Miao, Zhi-Qi Hu
As a novel population of neural crest-origin precursor cells, skin-derived precursor cells (SKPs) can be isolated from both embryonic and adult dermis. These cells have important values for research and potential clinical application in wound healing, organ regeneration and disease treatment for advantages in the abundance of cell sources, accessibility, potential of multipotent differentiation, and absence of ethical concerns. Here we review the developmental and anatomical origins of SKPs and their potential application in regenerative medicine...
March 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28358935/comparison-of-neurovascular-characteristics-of-facial-skin-in-patients-after-primary-and-revision-rhytidectomies
#14
Farhad Ardeshirpour, Elisabeth Hurliman, Gwen Wendelschafer-Crabb, Brian McAdams, Peter A Hilger, William R Kennedy, Amy Anne D Lassig, Michael J Brenner
Importance: Wound healing influences both the cosmetic and functional outcomes of facial surgery. Study of cutaneous innervation may afford insight into patients' preoperative wound healing potential and aid in their selection of appropriate surgical procedures. Objective: To present the quantitative and qualitative differences of epidermal nerve fibers (ENFs), neurotransmitters, vasculature, and mast cells in facial skin among patients after primary and revision rhytidectomies...
March 30, 2017: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/28325683/biomimetic-scaffolds-with-three-dimensional-undulated-microtopographies
#15
Jonelle Z Yu, Emrullah Korkmaz, Monica I Berg, Philip R LeDuc, O Burak Ozdoganlar
Many human and animal tissues naturally possess three-dimensional (3D) micro-scale geometries enabling certain physiological functions. Absence of these microgeometries in engineered tissues may undermine the effectiveness of corresponding tissue repair and regeneration. This paper introduces a novel approach to create tissue scaffolds with biomimetic 3D undulated microtopographies. The mechanical micromilling technology is used for precise and reproducible fabrication of poly(methyl methacrylate) (PMMA) master molds with 3D undulated microtopographies...
February 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28324846/novel-alk5-inhibitor-tp0427736-reduces-tgf-%C3%AE-%C3%A3-induced-growth-inhibition-in-human-outer-root-sheath-cells-and-elongates-anagen-phase-in-mouse-hair-follicles
#16
Takumi Naruse, Mari Aoki, Natsuko Fujimoto, Seiji Arase, Hajimu Oura, Yasuji Ueda, Akiko Ikeda
BACKGROUND: Androgenic alopecia (AGA) occurs as a result of the contraction of the anagen phase because of the action of androgens on hair follicles. TGF-β production from dermal papillae is enhanced by androgens, and growth inhibition of hair-follicle cells is induced by TGF-β, and the hair cycle progresses from the anagen phase to the catagen phase. We investigated both the in vitro and in vivo potency of the newly identified ALK5 inhibitor TP0427736 {6-[4-(4-methyl-1,3-thiazol-2-yl)-1H-imidazol-5-yl]-1,3-benzothiazole}...
June 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28321536/effect-of-sinapic-acid-on-hair-growth-promoting-in-human-hair-follicle-dermal-papilla-cells-via-akt-activation
#17
Hyunju Woo, Seungjun Lee, Seungbeom Kim, Deokhoon Park, Eunsun Jung
Hair loss known as alopecia is caused by abnormal hair follicle cycling including shortening of the anagen (growth) phase and changing of hair follicle morphology with miniaturization. In accordance with the life extension, the quality of life is considered to be a most important thing. The yearning for healthy and beautiful hair and low self esteem due to hair loss had negative influence on the quality of life with psychosocial maladjustment. The objective of this research was to identify new compound that can be used as a drug to promote hair growth...
March 20, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28296736/dermoscopic-features-of-livedoid-vasculopathy
#18
Stephen Chu-Sung Hu, Gwo-Shing Chen, Chi-Ling Lin, Yang-Chun Cheng, Yung-Song Lin
Livedoid vasculopathy (atrophie blanche) is a form of thrombotic vasculopathy. It is characterized by small ulcers that become crusted, and heal after several months to produce white atrophic scars. The most commonly affected sites are the lower legs, in particular the dorsum of the feet and ankles. To date, the dermoscopic features of livedoid vasculopathy have not been clearly described in the literature. In this observational study, we sought to evaluate the dermoscopic patterns of livedoid vasculopathy and determine whether the dermoscopic features are associated with certain histopathological characteristics...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28280377/promotion-of-anagen-increased-hair-density-and-reduction-of-hair-fall-in-a-clinical-setting-following-identification-of-fgf5-inhibiting-compounds-via-a-novel-2-stage-process
#19
Dominic Burg, Masakuni Yamamoto, Masato Namekata, Joseph Haklani, Koichiro Koike, Maria Halasz
BACKGROUND: There are very few effective, scientifically validated treatments with known mechanisms of action for treatment of hair loss in both men and women. Fibroblast growth factor 5 (FGF5) is an important factor in the irreversible transition from anagen to catagen, and inhibition of FGF5 prolongs anagen phase and reduces hair loss. OBJECTIVE: We aimed to screen botanically derived molecules for FGF5 inhibitory activity in vitro and assess efficacy in a clinical setting...
2017: Clinical, Cosmetic and Investigational Dermatology
https://www.readbyqxmd.com/read/28276195/nodular-colloid-milium-mimicking-keloid
#20
Seyyede Zeinab Azimi, Omid Zargari, Robert I Rudolph
Colloid milium is a rare cutaneous deposit disease that usually presents clinically by the development of yellowish translucent or flesh-colored papules or plaques on sun-exposed skin. Histologically, it is characterized by the presence of colloid in the dermal papillae. In this case report, we present a 52-year-old man who presented with a nodule on his upper lip that mistakenly was diagnosed and treated as keloid.
March 9, 2017: Journal of Cosmetic Dermatology
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