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Dermal papilla

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https://www.readbyqxmd.com/read/29331373/establishment-and-characterization-of-five-immortalized-human-scalp-dermal-papilla-cell-lines
#1
Mi Hee Kwack, Jung Min Yang, Gong Hee Won, Moon Kyu Kim, Jung Chul Kim, Young Kwan Sung
Dermal papilla (DP) regulates the growth and cycling of hair follicles. Cultured DP cells are useful for the study of their role in relation to hair growth and regeneration. However, cultivation of human DP cells is tedious and difficult. In addition, cultured DP cells possess a relatively short replicative life span, requiring immortalized human DP cell lines. We previously established an immortalized human DP cell line, SV40T-hTERT-DPC, by introducing human telomerase reverse transcriptase (hTERT) gene into the transformed cell line, SV40T-DPC...
January 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29318579/evaluation-of-icam-1-expression-and-vascular-changes-in-the-skin-of-patients-with-plaque-pustular-and-erythrodermic-psoriasis
#2
Aline L Bressan, Bruna L S Picciani, Luna Azulay-Abulafia, Anna K Fausto-Silva, Paula N Almeida, Karin S G Cunha, Eliane P Dias, Sueli Carneiro
BACKGROUND: Psoriasis is a chronic inflammatory disease. Pustular, erythrodermic, and extensive plaque psoriasis are responsible for systemic complications. Systemic capillary leak syndrome is the complication with greater progression to death and occurs due to vascular changes. PURPOSE: The aim of this study was to evaluate vascular changes through the expression of CD34 and ICAM-1 in plaque, pustular, and erythrodermic psoriasis. METHODS: The sample consisted of seven patients with erythrodermic psoriasis, 24 with moderate-severe plaque psoriasis, 14 with mild plaque psoriasis and 13 with pustular psoriasis...
January 10, 2018: International Journal of Dermatology
https://www.readbyqxmd.com/read/29317265/wound-regeneration-deficit-in-rats-correlates-with-low-morphogenetic-potential-and-distinct-transcriptome-profile-of-epidermis
#3
Christian F Guerrero-Juarez, Aliaksandr A Astrowski, Rabi Murad, Christina T Dang, Vera O Shatrova, Aksana Astrowskaja, Chae Ho Lim, Raul Ramos, Xiaojie Wang, Yuchen Liu, Hye-Lim Lee, Kim T Pham, Tsai-Ching Hsi, Ji Won Oh, Daniel Crocker, Ali Mortazavi, Mayumi Ito, Maksim V Plikus
Large excisional wounds in mice prominently regenerate new hair follicles (HFs) and fat, yet humans are deficient for this regenerative behavior. Currently, wound-induced regeneration remains a clinically desirable, but only partially understood phenomenon. We show that large excisional wounds in rats, across seven strains fail to regenerate new HFs. We compared wound transcriptomes between mice and rats at the time of scab detachment, which coincides with the onset of HF regeneration in mice. In both species, wound dermis and epidermis share core dermal and epidermal transcriptional programs respectively, yet prominent inter-species differences exist...
January 6, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29295567/minoxidil-induction-of-vegf-is-mediated-by-inhibition-of-hif-prolyl-hydroxylase
#4
Soohwan Yum, Seongkeun Jeong, Dohoon Kim, Sunyoung Lee, Wooseong Kim, Jin-Wook Yoo, Jung-Ae Kim, Oh Sang Kwon, Dae-Duk Kim, Do Sik Min, Yunjin Jung
The topical application of minoxidil may achieve millimolar concentrations in the skin. We investigated whether millimolar minoxidil could induce vascular endothelial growth factor (VEGF), a possible effector for minoxidil-mediated hair growth, and how it occurred at the molecular level. Cell-based experiments were performed to investigate a molecular mechanism underlying the millimolar minoxidil induction of VEGF. The inhibitory effect of minoxidil on hypoxia-inducible factor (HIF) prolyl hydroxylase-2 (PHD-2) was tested by an in vitro von Hippel-Lindau protein (VHL) binding assay...
December 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29250711/objective-evaluation-of-the-effects-of-intense-pulsed-light-treatment-on-asian-skin-by-reflectance-confocal-microscopy-analysis
#5
Wenjia Sun, Jiaqiang Wu, Hui Qian, Juemin Zhao, Leihong Xiang, Chengfeng Zhang
This study aimed to evaluate the effect of IPL treatment on Asian skin by reflectance confocal microscopy (RCM) analysis. Ten Asian female volunteers (39~54 years old, Fitzpatrick skin type III~IV) received five monthly IPL treatments. RCM skin images were evaluated, and several skin physiological parameters including thickness of stratum corneum, minimal thickness of epidermis, thickness of basal layer, density of dermal papillae, and mean diameter of papillae capillaries were measured both at baseline and 1 month after the last treatment...
December 18, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29249922/rice-bran-mineral-extract-increases-the-expression-of-anagen-related-molecules-in-human-dermal-papilla-through-wnt-catenin-pathway
#6
Yu-Mi Kim, Soon-Joung Kwon, Hyun-Joon Jang, Young-Kwon Seo
The objective of this study is to evaluate of rice bran mineral extract (RBM) increases the expression of anagen-related molecules in human dermal papilla (DOCs). Four treatment groups were established to evaluate the efficacy of RBM, including a negative control, positive control (ascorbic acid), RBM and ortho-silicic acid (Si(OH)4) (OSA) group. Three days after the DPCs were administered the various treatments, western blot analysis showed that type I collagen expression was increased 2.5-fold in the OSA group and 4-fold in the RBM group, and ALP expression was increased 1...
2017: Food & Nutrition Research
https://www.readbyqxmd.com/read/29245976/gsdma3-regulates-hair-follicle-differentiation-via-wnt5a-mediated-non-canonical-wnt-signaling-pathway
#7
Long He, Mingxing Lei, Yizhan Xing, Yuhong Li, Chunyan Hu, Peixing Chen, Xiaohua Lian, Tian Yang, Wanqian Liu, Li Yang
Hair follicle is a mini-organ that consists of complex but well-organized structures, which are differentiated from hair follicle progenitor or stem cells. How non-canonical Wnt signaling pathway is involved in regulating hair follicle differentiation remains elusive. Here we showed that Wnt5a regulates hair follicle differentiation through an epithelial-mesenchymal interaction mechanism in mice. We first observed that Wnt5a is expressed in the epithelial and dermal papilla cells during hair follicle development and growth...
November 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/29227036/bottom-up-nanoencapsulation-from-single-cells-to-tunable-and-scalable-cellular-spheroids-for-hair-follicle-regeneration
#8
Jin Wang, Yong Miao, Yong Huang, Bojie Lin, Xiaomin Liu, Shune Xiao, Lijuan Du, Zhiqi Hu, Malcolm Xing
Cell surface engineering technology advances cell therapeutics and tissue engineering by accurate micro/nanoscale control in cell-biomaterial ensembles and cell spheroids formation. By tailoring cell surface, microgels can encapsulate cells for versatile uses. However, microgels are coated in a thick layer to house multiple cells together but not a single cell based. Besides, excessive deposition on cell surface is detrimental to cellular functions. Herein, layer-by-layer (LbL) self-assembly to encapsulate single cell using nanogel is reported, owing to its security and tunable thickness at nanoscale, and further forms cell spheroids by physical cross-linking on nanogel-coated cells for delivery...
December 11, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29220415/effect-of-3d-microstructure-of-dermal-papillae-on-sed-concentration-at-a-mechanoreceptor-location
#9
Trung Quang Pham, Takayuki Hoshi, Yoshihiro Tanaka, Akihito Sano
The feeling of touch is an essential human sensation. Four types of mechanoreceptors (i.e., FA-I, SA-I, FA-II, and SA-II) in human skin signalize physical properties, such as shape, size, and texture, of an object that is touched and transmit the signal to the brain. Previous studies attempted to investigate the mechanical properties of skin microstructure and their effect on mechanoreceptors by using finite element modeling. However, very few studies have focused on the three-dimensional microstructure of dermal papillae, and this is related to that of FA-I receptors...
2017: PloS One
https://www.readbyqxmd.com/read/29200764/various-wavelengths-of-light-emitting-diode-light-regulate-the-proliferation-of-human-dermal-papilla-cells-and-hair-follicles-via-wnt-%C3%AE-catenin-and-the-extracellular-signal-regulated-kinase-pathways
#10
Hong Jin Joo, Kwan Ho Jeong, Jung Eun Kim, Hoon Kang
Background: The human dermal papilla cells (hDPCs) play an important role in regulation of hair cycling and growth. Objective: The aim of this study was to investigate the effect of different wavelengths of light-emitting diode (LED) irradiation on the proliferation of cultured hDPCs and on the growth of human hair follicles (HFs) in vitro. Methods: We examined the effect of LED irradiation on Wnt/β-catenin signaling and mitogen-activated protein kinase (MAPK) pathways in hDPCs...
December 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/29177513/multiple-regulatory-modules-are-required-for-scale-to-feather-conversion
#11
Ping Wu, Jie Yan, Yung-Chih Lai, Chen Siang Ng, Ang Li, Xueyuan Jiang, Ruth Elsey, Randall Widelitz, Ruchi Bajpai, Wen-Hsiung Li, Cheng-Ming Chuong
The origin of feathers is an important question in Evo-Devo studies, with the eventual evolution of vaned feathers which are aerodynamic, allowing feathered dinosaurs and early birds to fly and venture into new ecological niches. Studying how feathers and scales are developmentally specified provides insight into how a new organ may evolve. We identified feather-associated genes using genomic analyses. The candidate genes were tested by expressing them in chicken and alligator scale forming regions. Ectopic expression of these genes induced intermediate morphotypes between scales and feathers which revealed several major morphogenetic events along this path: localized growth zone formation, follicle invagination, epithelial branching, feather keratin differentiation and dermal papilla formation...
November 21, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29170241/how-does-paw-pad-of-canine-attenuate-ground-impacts-a-multi-layer-cushion-system
#12
Huaibin Miao, Jun Fu, Zhihui Qian, Luquan Ren, Lei Ren
Macroscopic mechanical properties of digitigrade paw pads, such as non-linear elastic and variable stiffness, have been investigated in previous studies. However, little is known about the micro-scale structural characteristics of digitigrade paw pads or the relationship between these characteristics and the exceptional cushioning of the pads. The digitigrade paw pad consists of a multi-layered structure, which is mainly comprised of a stratified epithelium layer, a dermis layer and a subcutaneous layer. The stratified epithelium layer and dermal papillae constitute the epidermis layer...
November 23, 2017: Biology Open
https://www.readbyqxmd.com/read/29140150/radiotherapy-for-cervical-cancer-impact-on-the-vaginal-epithelium-and-sexual-function
#13
Alexandra Hofsjö, Karin Bergmark, Bo Blomgren, Helen Jahren, Nina Bohm-Starke
BACKGROUND: Women who have been treated for cervical cancer have persistent changes in their sexual function, which result in considerable distress. The aim of this study was to investigate the morphology of the vaginal epithelium in cervical cancer survivors treated with radiotherapy and its correlation to serum levels of sex steroid hormones and sexual function. MATERIAL AND METHODS: We included 34 patients treated for cervical cancer with radiotherapy and 37 healthy age-matched control women scheduled for benign gynecological surgery...
November 15, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/29138430/extracellular-vesicles-derived-from-mscs-activates-dermal-papilla-cell-in-vitro-and-promotes-hair-follicle-conversion-from-telogen-to-anagen-in-mice
#14
Ramya Lakshmi Rajendran, Prakash Gangadaran, Soon Sun Bak, Ji Min Oh, Senthilkumar Kalimuthu, Ho Won Lee, Se Hwan Baek, Liya Zhu, Young Kwan Sung, Shin Young Jeong, Sang-Woo Lee, Jaetae Lee, Byeong-Cheol Ahn
Hair loss is a common medical problem. In this study, we investigated the proliferation, migration, and growth factor expression of human dermal papilla (DP) cells in the presence or absence of treatment with mesenchymal stem cell extracellular vesicles (MSC-EVs). In addition, we tested the efficacy of MSC-EV treatment on hair growth in an animal model. MSC-EV treatment increased DP cell proliferation and migration, and elevated the levels of Bcl-2, phosphorylated Akt and ERK. In addition; DP cells treated with MSC-EVs displayed increased expression and secretion of VEGF and IGF-1...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29129979/hair-germ-model-in-vitro-via-human-postnatal-keratinocyte-dermal-papilla-interactions-impact-of-hyaluronic-acid
#15
Ekaterina Kalabusheva, Vasily Terskikh, Ekaterina Vorotelyak
Hair follicle (HF) reconstruction in vitro is a promising field in alopecia treatment and human HF development research. Here, we combined postnatal human dermal papilla (DP) cells and skin epidermal keratinocytes (KCs) in a hanging drop culture to develop an artificial HF germ. The method is based on DP cell hair-inducing properties and KC self-organization. We evaluated two protocols of aggregate assembling. Mixed HF germ-like structures demonstrated the initiation of epithelial-mesenchymal interaction, including WNT pathway activation and expression of follicular markers...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29119273/immunohistochemical-distribution-of-ki67-in-epidermis-of-thick-glabrous-skin-of-human-digits
#16
Aleksandar Petrovic, Vladimir Petrovic, Bobana Milojkovic, Ivan Nikolic, Dragan Jovanovic, Aleksandra Antovic, Miroslav Milic
The glabrous skin on the flexor sides of hands and feet, compared to other integument regions, has thicker epidermis and more complex pattern of epidermal ridges, wherefore in microscopy is denominated as thick skin. The epidermis of this skin type has individually unique and permanent superficial patterns, called dermatoglyphics, which are maintained by regenerative potential of deep epidermal rete ridges, that interdigitate with adjacent dermis. Using light microscopy, we analyzed cadaveric big toes thick skin samples, described histology of deep epidermal ridges (intermediate, limiting, and transverse), and quantitatively evidenced their pattern of proliferation by immunohistochemical assessment of Ki67...
November 8, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/29076290/the-effect-of-plasma-rich-in-growth-factors-combined-with-follicular-unit-extraction-surgery-for-the-treatment-of-hair-loss-a-pilot-study
#17
Roge M Navarro, Ander Pino, Asunción Martinez-Andres, Consuelo Molina, Ana María Martinez, Nahikari Martinez, Gorka Orive, Eduardo Anitua
BACKGROUND: Hair transplant surgery using follicular unit extraction technique (FUE) is a common surgical procedure for the treatment of severe hair loss. Blood-derived autologous growth factors have also proved to promote hair regeneration in patients with different types of alopecia. AIMS: The aim of this study was to evaluate the safety and clinical efficacy of plasma rich in growth factors (PRGF) technology as an adjuvant therapy for FUE surgery in hair loss affected patients...
October 26, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29060675/effect-of-laser-diode-light-irradiation-on-growth-capability-of-human-hair-follicle-dermal-papilla-cells
#18
S Jampa-Ngern, K Viravaidya-Pasuwat, S Suvanasuthi, A Khantachawana
Low level laser therapy is widely used to relieve pain and inflammation, and to restore cellular functions. The photons of light are absorbed by mitochondria in cells, leading to an increase in the production of adenosine triphosphate (ATP), nitric oxide release, blood flow, and reactive oxygen species (ROS). This study proposed the use of a laser diode array at 808 nm to stimulate the proliferation and to activate the functions of dermal papilla cells, which were an important part of the hair growth cycle...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29055410/getting-to-the-core-of-the-dermal%C3%A2-papilla
#19
Mingxing Lei, Li Yang, Cheng-Ming Chuong
Through coordinated and reciprocal interactions between the epithelium and mesenchyme, diverse integumentary organs form and undergo cyclic renewal. The hair follicle has become the main model to understand this extraordinary regenerative behavior. At the core is the dermal papilla, the organizing center, and the epithelial stem cells that respond to dermal papilla signaling. Two recent papers by Telerman et al. and Yang et al. unravel new molecular landscapes within the dermal papilla.
November 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29054756/a-lncrna-h19-transcript-from-secondary-hair-follicle-of-liaoning-cashmere-goat-identification-regulatory-network-and-expression-regulated-potentially-by-its-promoter-methylation
#20
Yu B Zhu, Ze Y Wang, Rong H Yin, Qian Jiao, Su J Zhao, Yu Y Cong, Hui L Xue, Dan Guo, Shi Q Wang, Yan X Zhu, Wen L Bai
The H19 transcript (imprinted maternally expressed transcript) is well-known as long noncoding RNA (lncRNA), and it is thought to be associated with the inductive capacity of dermal papilla cells for hair-follicle reconstruction. In this study, we isolated and characterized a lncRNA-H19 transcript from the secondary hair follicle of Liaoning cashmere goat. Also, we investigated its transcriptional pattern and methylation status of H19 gene in secondary hair follicle of this breed during different stages of hair follicle cycle...
October 17, 2017: Gene
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