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https://www.readbyqxmd.com/read/29136266/prostanoids-and-hair-follicles-implications-for-therapy-of-hair-disorders
#1
Xue-Gang Xu, Hong-Duo Chen
Prostanoids, including prostaglandins (PGs) and thromboxane A2 (TXA2), are a family of lipid-derived autacoids that modulate many physiological systems and pathological contexts. Prostanoids are generated by sequential metabolism of arachidonic acid, catalysed by cyclo-oxygenase, to PGH2, which is then converted to PGD2, PGE2, PGF2α, PGI2 and TXA2, catalysed by their specific synthases. Recent evidence suggests that prostanoids play a role in regulating hair growth. The PGF2α analogue is Food and Drug Administration-approved and routinely used to enhance the growth of human eyelashes...
November 14, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/29094203/creation-of-miniature-pig-model-of-human-waardenburg-syndrome-type-2a-by-enu-mutagenesis
#2
Tang Hai, Weiwei Guo, Jing Yao, Chunwei Cao, Ailing Luo, Meng Qi, Xianlong Wang, Xiao Wang, Jiaojiao Huang, Ying Zhang, Hongyong Zhang, Dayu Wang, Haitao Shang, Qianlong Hong, Rui Zhang, Qitao Jia, Qiantao Zheng, Guosong Qin, Yongshun Li, Tao Zhang, Weiwu Jin, Zheng-Yi Chen, Hongmei Wang, Qi Zhou, Anming Meng, Hong Wei, Shiming Yang, Jianguo Zhao
Human Waardenburg syndrome 2A (WS2A) is a dominant hearing loss (HL) syndrome caused by mutations in the microphthalmia-associated transcription factor (MITF) gene. In mouse models with MITF mutations, WS2A is transmitted in a recessive pattern, which limits the study of hearing loss (HL) pathology. In the current study, we performed ENU (ethylnitrosourea) mutagenesis that resulted in substituting a conserved lysine with a serine (p. L247S) in the DNA-binding domain of the MITF gene to generate a novel miniature pig model of WS2A...
November 1, 2017: Human Genetics
https://www.readbyqxmd.com/read/29084289/neuronal-differentiation-of-hair-follicle-bulge-derived-stem-cells-co-cultured-with-mouse-cochlear-modiolus-explants
#3
Timo Schomann, Laura Mezzanotte, John C M J De Groot, Marcelo N Rivolta, Sanne H Hendriks, Johan H M Frijns, Margriet A Huisman
Stem-cell-based repair of auditory neurons may represent an attractive therapeutic option to restore sensorineural hearing loss. Hair-follicle-bulge-derived stem cells (HFBSCs) are promising candidates for this type of therapy, because they (1) have migratory properties, enabling migration after transplantation, (2) can differentiate into sensory neurons and glial cells, and (3) can easily be harvested in relatively high numbers. However, HFBSCs have never been used for this purpose. We hypothesized that HFBSCs can be used for cell-based repair of the auditory nerve and we have examined their migration and incorporation into cochlear modiolus explants and their subsequent differentiation...
2017: PloS One
https://www.readbyqxmd.com/read/29059194/role-of-neuropilin-1-semaphorin-3a-signaling-in-the-functional-and-morphological-integrity-of-the-cochlea
#4
Pezhman Salehi, Marshall X Ge, Usha Gundimeda, Leah Michelle Baum, Homero Lael Cantu, Joel Lavinsky, Litao Tao, Anthony Myint, Charlene Cruz, Juemei Wang, Angeliki Maria Nikolakopoulou, Carolina Abdala, Matthew William Kelley, Takahiro Ohyama, Thomas Matthew Coate, Rick A Friedman
Neuropilin-1 (Nrp1) encodes the transmembrane cellular receptor neuropilin-1, which is associated with cardiovascular and neuronal development and was within the peak SNP interval on chromosome 8 in our prior GWAS study on age-related hearing loss (ARHL) in mice. In this study, we generated and characterized an inner ear-specific Nrp1 conditional knockout (CKO) mouse line because Nrp1 constitutive knockouts are embryonic lethal. In situ hybridization demonstrated weak Nrp1 mRNA expression late in embryonic cochlear development, but increased expression in early postnatal stages when cochlear hair cell innervation patterns have been shown to mature...
October 2017: PLoS Genetics
https://www.readbyqxmd.com/read/29055061/preservation-of-stem-cells-in-androgenetic-alopecia
#5
Hend Gamil, Magda Assaf, Manal Elsayed, Khaled Gharib, Mohamed Soliman, Naglaa A Mostafa
Androgenetic alopecia is characterized by progressive, patterned hair loss from the scalp that occurs in both men and women. Suggested that genetically predisposed hair follicles are target for androgen-stimulated follicle miniaturization, with gradual replacement of terminal hairs by vellus hairs. We aimed at evaluating the expression of stem and progenitor cell markers using IHC in scalp biopsies from affected and unaffected areas of patients with AGA. This article is protected by copyright. All rights reserved...
October 21, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29054497/association-between-male-pattern-baldness-and-prostate-disease-a-meta-analysis
#6
Tao Jin, Tao Wu, Zhumei Luo, Xi Duan, Shi Deng, Yin Tang
BACKGROUND: Male pattern baldness (MPB) has been associated with an increased risk of prostate cancer (PC) as well as benign prostatic hyperplasia (BPH). We performed a meta-analysis to quantitatively determine the level of risk of PC and BPH in individuals with baldness. METHODS: A systematic literature search was conducted using several databases. We calculated pooled odds ratios (OR) and 95% CIs. RESULTS: In total, 17 studies comprising 68,448 participants were eligible for the meta-analysis and showed that MPB is associated with an increased risk of aggressive PC (OR = 1...
October 17, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/29054432/expression-pattern-of-eya4-in-the-common-marmoset-callithrix-jacchus-cochlea
#7
Saeko Matsuzaki, Makoto Hosoya, Hideyuki Okano, Masato Fujioka, Kaoru Ogawa
The eyes absent (EYA)-like genes are essential for the formation of sensory organs among fly (Drosophila melanogaster) and mammals. EYA4, one of the vertebrate genes of Eya family, is reported to be causative for late-onset mid-frequency sensorineural hearing loss in humans, while Eya4-deficient mice exhibited congenital profound deafness and otitis media with effusion due to the eustachian tube dysmorphology. Because of the species difference in the phenotype, the pathophysiology of EYA4 in the human cochlea has yet to be elucidated...
October 18, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29035284/traction-alopecia-a-neglected-entity-in-2017
#8
REVIEW
Christiana Oyinlola Akingbola, Jui Vyas
Traction alopecia was first described in 1904 but is still a cause of scarring hair loss in young women worldwide. It is unique in being initially a reversible then an irreversible (scarring) form of alopecia. Linked to tightly-pulled hairstyles, it is seen across all races. The pattern of hair loss depends on the style creating it but most commonly affects the frontotemporal hairline. There are some new examination findings associated with traction alopecia, which are traction folliculitis, the fringe sign and hair casts (pseudonits) on dermatoscopy...
November 2017: Indian Journal of Dermatology, Venereology and Leprology
https://www.readbyqxmd.com/read/29028860/-man-some-a-review-of-male-facial-aging-and-beauty
#9
Terrence Colin Keaney
<p>Gender plays a significant role in determining facial anatomy and behavior, both of which are key factors in the aging process. Understanding the pattern of male facial aging is critical when planning aesthetic treatments on men. Men develop more severe rhytides in a unique pattern, show increased periocular aging changes, and are more prone to hair loss. What also needs to be considered when planning a treatment is what makes men beautiful or "man-some". Male beauty strikes a balance between masculine and feminine facial features...
June 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29017840/focal-atrichia-a-diagnostic-clue-in-female-pattern-hair-loss
#10
Elise A Olsen, David A Whiting
BACKGROUND: Focal atrichia is a common clinical finding in female pattern hair loss whose specificity and histologic findings need further clarification. OBJECTIVE: To determine the frequency of focal atrichia in various types of hair loss and its histologic characteristics in female pattern hair loss. METHODS: Part 1: Review of 250 consecutive female patients seen with hair loss for the presence of focal atrichia and Part 2: paired biopsies of haired areas vs focal atrichia in 18 subjects with female pattern hair loss RESULTS: Focal atrichia was seen in 46/104 (44%) of women with female pattern hair loss, including 67% of late onset vs 15% of early onset, compared to 3/146 (2%) of those with other hair disorders Biopsy findings of focal atrichia in female pattern hair loss showed primarily a more progressive miniaturization process than that of haired areas of the scalp...
October 7, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28973128/screening-guidelines-for-thyroid-function-in-children-with-alopecia-areata
#11
Deepa Patel, Ping Li, Andrew J Bauer, Leslie Castelo-Soccio
Importance: The incidence of thyroid disease in children with alopecia areata (AA) has been widely studied with no consensus on whether a true association with AA exists. In addition, screening practices for thyroid dysfunction in children with AA vary widely among clinicians. Objective: To reduce health care costs, eliminate unnecessary testing, and standardize clinical practices, we sought to to characterize thyroid function in children with AA to establish guidelines for screening...
September 27, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28971497/circulating-and-intraprostatic-sex-steroid-hormonal-profiles-in-relation-to-male-pattern-baldness-and-chest-hair-density-among-men-diagnosed-with-localized-prostate-cancers
#12
MULTICENTER STUDY
Cindy Ke Zhou, Frank Z Stanczyk, Muhannad Hafi, Carmela C Veneroso, Barlow Lynch, Roni T Falk, Shelley Niwa, Eric Emanuel, Yu-Tang Gao, George P Hemstreet, Ladan Zolfghari, Peter R Carroll, Michael J Manyak, Isabell A Sesterhenn, Paul H Levine, Ann W Hsing, Michael B Cook
BACKGROUND: Prospective cohort studies of circulating sex steroid hormones and prostate cancer risk have not provided a consistent association, despite evidence from animal and clinical studies. However, studies using male pattern baldness as a proxy of early-life or cumulative androgen exposure have reported significant associations with aggressive and fatal prostate cancer risk. Given that androgens underlie the development of patterned hair loss and chest hair, we assessed whether these two dermatological characteristics were associated with circulating and intraprostatic concentrations of sex steroid hormones among men diagnosed with localized prostate cancer...
December 2017: Prostate
https://www.readbyqxmd.com/read/28932068/familial-cicatricial-alopecia-report-of-familial-frontal-fibrosing-alopecia-and-fibrosing-alopecia-in-a-pattern-distribution
#13
Dandara Meurer Missio, Maria Fernanda Reis Gavazzoni Dias, Ralph Michel Trüeb
Frontal fibrosing alopecia (FFA) and fibrosing alopecia in a pattern distribution (FAPD) as originally reported by Kossard in 1994 and by Zinkernagel and Trüeb in 2000, respectively, represent two distinct patterns of cicatricial pattern hair loss. Both share a patterned distribution and histological evidence of a lichenoid follicular inflammation with fibrosis. FFA is characterized by a marginal alopecia along the frontotemporal hairline, and FAPD by a progressive alopecia of the centroparietal scalp. Since the original reports, evidence has accumulated that there exists considerable clinical overlap among FFA, FAPD, and lichen planopilaris, with coexistence of features of the three conditions within the same individual...
July 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28932059/prevalence-of-nutritional-deficiencies-in-hair-loss-among-indian-participants-results-of-a-cross-sectional-study
#14
Dinesh Gowda, V Premalatha, D B Imtiyaz
BACKGROUND: Nutritional deficiencies are known to be associated with hair loss; however, the exact prevalence is not known. AIMS: The aim of this study is to evaluate the prevalence of nutritional deficiencies in participants with hair loss. MATERIALS AND METHODS: In this cross-sectional study, 100 enrolled participants were divided into telogen effluvium (TE), male-pattern hair loss (MPHL), and female-pattern hair loss (FPHL) based on the type of hair loss...
July 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28932058/classification-of-male-pattern-hair-loss
#15
REVIEW
Christopher Toshihiro Wirya, Wenyu Wu, Kejia Wu
Male-pattern hair loss (MPHL) is a condition that affects the majority of men during adulthood. This condition is not life threatening but needs constant treatment and monitoring, especially in recent years where male appearance is gaining significant importance in society. An ideal classification with high amount of detail, practicality, and reproducibility is required to accurately diagnose and monitor this condition regularly and to assess the outcome of treatment. Numerous classifications have been invented, but many variants with different levels of detail, practicality, and reproducibility may cause confusion among clinicians...
July 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28925723/expression-patterns-of-members-of-the-isocitrate-dehydrogenase-gene-family-in-murine-inner-ear
#16
Y-R Kim, K-H Kim, S Lee, S-K Oh, J-W Park, K-Y Lee, J-I Baek, U-K Kim
Age-related hearing loss (ARHL) is characterized by an age-dependent decline of auditory function characterized by with loss of sensory hair cells, spiral ganglion neurons, and stria vascularis (SV) cells in the cochlea of the inner ear. Aging and age-related diseases result from accumulated oxidative damage caused by reactive oxygen species (ROS) generated by mitochondria. The isocitrate dehydrogenase (IDH) family includes three enzymes in human cells: IDH1, IDH2, and IDH3. Although all three enzymes catalyze the same enzymatic reaction, that is, oxidative decarboxylation of isocitrate to produce α-ketoglutarate, each IDH enzyme has unique features...
September 19, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28852294/a-spilt-head-study-of-efficacy-of-placebo-versus-platelet-rich-plasma-injections-in-the-treatment-of-androgenic-alopecia
#17
Dilip Kachhawa, Gauri Vats, Durgesh Sonare, Pankaj Rao, Sandeep Khuraiya, Rohit Kataiya
BACKGROUND: Platelet-rich plasma (PRP) is an autologous concentration of human platelets contained in a small volume of plasma with haemostatic and tissue repairing effects. Being enriched by various growth factors, PRP has become the focus of attention in numerous fields of medicine. Androgenic alopecia (AGA) is a common chronic hair loss disorder, characterised by progressive hair loss. Despite the therapeutic options available, there is low patient compliance and satisfaction rate...
April 2017: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/28838968/tbx1-and-jag1-act-in-concert-to-modulate-the-fate-of-neurosensory-cells-of-the-mouse-otic-vesicle
#18
Stephania Macchiarulo, Bernice E Morrow
The domain within the otic vesicle (OV) known as the neurosensory domain (NSD), contains cells that will give rise to the hair and support cells of the otic sensory organs, as well as the neurons that form the cochleovestibular ganglion (CVG). The molecular dynamics that occur at the NSD boundary relative to adjacent OV cells is not well defined. The Tbx1 transcription factor gene expression pattern is complementary to the NSD, and inactivation results in expansion of the NSD and expression of the Notch ligand, Jag1 mapping, in part of the NSD...
October 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28791288/a-practical-approach-to-the-diagnosis-and-management-of-hair-loss-in-children-and-adolescents
#19
REVIEW
Liwen Xu, Kevin X Liu, Maryanne M Senna
Hair loss or alopecia is a common and distressing clinical complaint in the primary care setting and can arise from heterogeneous etiologies. In the pediatric population, hair loss often presents with patterns that are different from that of their adult counterparts. Given the psychosocial complications that may arise from pediatric alopecia, prompt diagnosis and management is particularly important. Common causes of alopecia in children and adolescents include alopecia areata, tinea capitis, androgenetic alopecia, traction alopecia, trichotillomania, hair cycle disturbances, and congenital alopecia conditions...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28740409/hair-follicle-growth-by-stromal-vascular-fraction-enhanced-adipose-transplantation-in-baldness
#20
David Perez-Meza, Craig Ziering, Marcos Sforza, Ganesh Krishnan, Edward Ball, Eric Daniels
Great interest remains in finding new and emerging therapies for the treatment of male and female pattern hair loss. The autologous fat grafting technique is >100 years old, with a recent and dramatic increase in clinical experience over the past 10-15 years. Recently, in 2001, Zuk et al published the presence of adipose-derived stem cells, and abundant research has shown that adipose is a complex, biological active, and important tissue. Festa et al, in 2011, reported that adipocyte lineage cells support the stem cell niche and help drive the complex hair growth cycle...
2017: Stem Cells and Cloning: Advances and Applications
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