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Zhu N, Yan J, Gu W, Yang Q, Lin E, Lu S, Cai B, Xia B, Liu X, Lin C. Dermal papilla cell-secreted biglycan regulates hair follicle phase transit and regeneration by activating Wnt/β-catenin. Exp Dermatol 2024; 33:e14969. [PMID: 37967213 DOI: 10.1111/exd.14969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 09/06/2023] [Accepted: 10/19/2023] [Indexed: 11/17/2023]
Abstract
Alopecia is a prevalent problem of cutaneous appendages and lacks effective therapy. Recently, researchers have been focusing on mesenchymal components of the hair follicle, i.e. dermal papilla cells, and we previously identified biglycan secreted by dermal papilla cells as the key factor responsible for hair follicle-inducing ability. In this research, we hypothesized biglycan played an important role in hair follicle cycle and regeneration through regulating the Wnt signalling pathway. To characterize the hair follicle cycle and the expression pattern of biglycan, we observed hair follicle morphology in C57BL/6 mice on Days 0, 3, 5, 12 and 18 post-depilation and found that biglycan is highly expressed at both mRNA and protein levels throughout anagen in HFs. To explore the role of biglycan during the phase transit process and regeneration, local injections were administered in C57BL/6 and nude mice. Results showed that local injection of biglycan in anagen HFs delayed catagen progression and involve activating the Wnt/β-catenin signalling pathway. Furthermore, local injection of biglycan induced HF regeneration and up-regulated expression of key Wnt factors in nude mice. In addition, cell analyses exhibited biglycan knockdown inactivated the Wnt signalling pathway in early-passage dermal papilla cell, whereas biglycan overexpression or incubation activated the Wnt signalling pathway in late-passage dermal papilla cells. These results indicate that biglycan plays a critical role in regulating HF cycle transit and regeneration in a paracrine and autocrine fashion by activating the Wnt/β-catenin signalling pathway and could be a potential treatment target for hair loss diseases.
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Affiliation(s)
- Ningxia Zhu
- Department of Pathology and Physiopathology, Guilin Medical University, Guilin, People's Republic of China
| | - Junping Yan
- Department of Pathology and Physiopathology, Guilin Medical University, Guilin, People's Republic of China
| | - Weifan Gu
- Department of Pathology and Physiopathology, Guilin Medical University, Guilin, People's Republic of China
| | - Qilin Yang
- Department of Pathology and Physiopathology, Guilin Medical University, Guilin, People's Republic of China
| | - En Lin
- Department of Histology and Embryology, Shantou University Medical College, Shantou, People's Republic of China
| | - Siyue Lu
- Department of Pathology and Physiopathology, Guilin Medical University, Guilin, People's Republic of China
| | - Bozhi Cai
- Tissue Engineering Laboratory, First Affiliated Hospital, Shantou University Medical College, Shantou, People's Republic of China
| | - Bin Xia
- Department of Pathology and Physiopathology, Guilin Medical University, Guilin, People's Republic of China
| | - Xin Liu
- Department of Pathology and Physiopathology, Guilin Medical University, Guilin, People's Republic of China
| | - Changmin Lin
- Department of Histology and Embryology, Shantou University Medical College, Shantou, People's Republic of China
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Kwack MH, Hamida OB, Kim MK, Kim MK, Sung YK. Establishment and characterization of matched immortalized human frontal and occipital scalp dermal papilla cell lines from androgenetic alopecia. Sci Rep 2023; 13:21421. [PMID: 38049592 PMCID: PMC10696020 DOI: 10.1038/s41598-023-48942-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 12/01/2023] [Indexed: 12/06/2023] Open
Abstract
Androgenetic alopecia (AGA), also known as male pattern baldness, is a common hair loss condition influenced by genetic and hormonal factors. Variations in gene expression and androgen responsiveness have been observed between the frontal and occipital regions of AGA patients. However, obtaining and cultivating frontal hair follicles is challenging. Therefore, no matched frontal and occipital dermal papilla (DP) cell lines have been reported yet. This study aimed to establish matched immortalized human frontal and occipital scalp DP cell lines from AGA patients. Simian virus 40 large T antigen (SV40T-Ag) and human telomerase reverse transcriptase (hTERT) were introduced into primary human DP cells. The obtained cell lines were characterized by assessing their gene expression patterns, androgen receptor (AR) levels, and the presence of 5-alpha reductase (5αR). Additionally, we examined their response to dihydrotestosterone (DHT) and evaluated cell viability. The conditioned medium from the frontal DP cell line inhibited human hair follicle growth, leading to reduced keratinocyte proliferation and increased apoptosis. Furthermore, when the cells were cultured in a 3D environment mimicking in vivo conditions, the 3D cultured frontal DP cell line exhibited weaker sphere aggregation than the occipital DP cell line due to the increased expression of matrix metalloproteinase 1 (MMP1), MMP3, and MMP9. Additionally, the expression of DP signature genes was inhibited in the 3D cultured frontal DP cell line. These matched frontal and occipital DP cell lines hold significant potential as valuable resources for research on hair loss. Their establishment allows us to investigate the differences between frontal and occipital DP cells, contributing to a better understanding of the molecular mechanisms underlying AGA. Furthermore, these cell lines may be valuable for developing targeted therapeutic approaches for hair loss conditions.
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Affiliation(s)
- Mi Hee Kwack
- Department of Immunology, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu, 41944, Republic of Korea.
- BK21 FOUR KNU Convergence Educational Program of Biomedical Sciences for Creative Future Talents, School of Medicine, Kyungpook National University, Daegu, Korea.
| | - Ons Ben Hamida
- Department of Immunology, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu, 41944, Republic of Korea
| | - Min Kyu Kim
- Department of Immunology, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu, 41944, Republic of Korea
| | - Moon Kyu Kim
- Department of Immunology, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu, 41944, Republic of Korea
- Hair Transplantation Center, Kyungpook National University Hospital, Daegu, Republic of Korea
| | - Young Kwan Sung
- Department of Immunology, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu, 41944, Republic of Korea
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Liu Q, Tang Y, Huang Y, Wang J, Yang K, Zhang Y, Pu W, Liu J, Shi X, Ma Y, Ni C, Zhang Y, Zhu Y, Li H, Wang J, Lin J, Wu W. Insights into male androgenetic alopecia using comparative transcriptome profiling: hypoxia-inducible factor-1 and Wnt/β-catenin signalling pathways. Br J Dermatol 2022; 187:936-947. [PMID: 35862273 PMCID: PMC10087000 DOI: 10.1111/bjd.21783] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 04/13/2022] [Accepted: 07/12/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND The key pathophysiological changes in androgenetic alopecia (AGA) are limited to hair follicles (HFs) in frontal and vertex regions, sparing the occipital region. OBJECTIVES To identify biological differences among HF subpopulations. METHODS Paired vertex and occipital HFs from 10 male donors with AGA were collected for RNA sequencing assay. Furthermore, HF and cell experiments were conducted on the identified key genes to reveal their roles in AGA. RESULTS Transcriptome profiles revealed that 506 mRNAs, 55 microRNAs and 127 long noncoding RNAs were differentially expressed in the AGA vertex HFs. Pathway analysis of mRNAs and microRNAs revealed involvement of the hypoxia-inducible factor (HIF)-1, Wnt/β-catenin, and focal adhesion pathways. Differential expression of HIF-1 prolyl hydroxylase enzymes (EGLN1, EGLN3) and Wnt/β-catenin pathway inhibitors (SERPINF1, SFRP2) was experimentally validated. In vitro studies revealed that reduction of EGLN1, EGLN3, SERPINF1 and SFRP2 stimulated proliferation of dermal papilla cells. Ex vivo HF studies showed that downregulation of EGLN1, EGLN3 and SERPINF1 promoted HF growth, postponed HF catagen transition, and prolonged the anagen stage, suggesting that these genes may be potentially utilized as therapeutic targets for AGA. CONCLUSIONS We characterized key transcriptome changes in male AGA HFs, and found that HIF-1 pathway-related genes (EGLN1, EGLN3) and Wnt pathway inhibitors (SERPINF1, SFRP2) may play important roles in AGA. What is already known about this topic? Multiple differentially expressed genes and signalling pathways have been found between hair follicles (HFs) in the balding area (frontal and vertex regions) and nonbalding area (occipital region) of individuals with androgenetic alopecia (AGA). A whole-transcriptome atlas of the vertex and occipital region is lacking. What does this study add? We identified a number of differentially expressed genes and pathways between balding vertex and nonbalding occipital AGA HFs by using whole-transcriptome analyses. We identified pathways not previously reported in AGA, such as the hypoxia-inducible factor (HIF)-1 signalling pathway. We verified that HIF-1 pathway-related genes (EGLN1, EGLN3) and Wnt pathway inhibitors (PEDF, SFRP2) played important roles in dermal papilla cell activity, hair growth and the hair cycle. What is the translational message? The EGLN1, EGLN3, SERPINF1 and SFRP2 genes may be potentially utilized as therapeutic targets for AGA.
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Affiliation(s)
- Qingmei Liu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Yulong Tang
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, and Human Phenome Institute, Fudan University, Shanghai, China
| | - Yan Huang
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, and Human Phenome Institute, Fudan University, Shanghai, China
| | - Ji'an Wang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Kai Yang
- Department of Dermatology, Jing'an District Central Hospital, Shanghai, China
| | - Yuting Zhang
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, and Human Phenome Institute, Fudan University, Shanghai, China
| | - Weilin Pu
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, and Human Phenome Institute, Fudan University, Shanghai, China
| | - Jing Liu
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, and Human Phenome Institute, Fudan University, Shanghai, China
| | - Xiangguang Shi
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Yanyun Ma
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, and Human Phenome Institute, Fudan University, Shanghai, China
| | - Chunya Ni
- Department of Dermatology, Jing'an District Central Hospital, Shanghai, China
| | - Yue Zhang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Yifei Zhu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Haiyang Li
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Jiucun Wang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China.,State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, and Human Phenome Institute, Fudan University, Shanghai, China.,Institute of Rheumatology, Immunology and Allergy, Fudan University, Shanghai, China.,Research Unit of Dissecting the Population Genetics and Developing New Technologies for Treatment and Prevention of Skin Phenotypes and Dermatological Diseases, Chinese Academy of Medical Sciences (2019RU058), Shanghai, China
| | - Jinran Lin
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Wenyu Wu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China.,Department of Dermatology, Jing'an District Central Hospital, Shanghai, China.,Academy for Engineering and Technology, Fudan University, Shanghai, China
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Qiu Y, Zhou X, Fu S, Luo S, Li Y. Systematic Review and Meta-analysis of the Association Between Metabolic Syndrome and Androgenetic Alopecia. Acta Derm Venereol 2021; 102:adv00645. [PMID: 34935992 PMCID: PMC9558341 DOI: 10.2340/actadv.v101.1012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The association of androgenetic alopecia with metabolic syndrome has been investigated in several studies, with conflicting results. We conducted a meta-analysis to quantitatively evaluate the risk grade of metabolic syndrome and the metabolic profile in patients with androgenetic alopecia compared with controls. In total, 19 articles (2,531 participants) satisfied the inclusion criteria. The pooled odds ratio for the prevalence rate of metabolic syndrome between the group with androgenetic alopecia and controls was 3.46 (95% CI 2.38–5.05; p < 0.001). Female sex, early onset, and African ethnicity were associated with an increased risk of metabolic syndrome. Furthermore, patients with androgenetic alopecia had significantly poorer metabolic profiles, such as body mass index, waist circumference, fasting glucose, blood lipids, and blood pressure. It is important for physicians to screen metabolism-related indicators in patients with androgenetic alopecia. More rigorously designed studies and larger sample sizes are required in future studies.
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Affiliation(s)
| | | | | | | | - Yaping Li
- Second Xiangya Hospital, Central South University, #139 Renmin Middle Rd, Changsha, Hunan 410011, P.R. China.
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5
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Melnichenko OO, Sakaniya LR, Piruzyan AL, Korsunskaya IM. Androgenetic alopecia and coronavirus infection. CONSILIUM MEDICUM 2021. [DOI: 10.26442/20751753.2021.8.201086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Androgenetic alopecia (AA) is a non-scarring hair loss in men and women caused by the effect of androgens on hair follicles which occurs in genetically predisposed individuals. The disease has chronic and progressive course and affects millions of people worldwide. AA treatments are limited, and understanding of the underlying pathophysiology is still is developing. Along with genetic predisposition and complex biochemical processes occurring in hair follicle cells, the role of new novel coronavirus infection COVID-19 in AA is widely discussed. Today, information on the epidemiology, clinical manifestations, prevention and treatment of coronavirus infection COVID-19 is constantly being updated. COVID-19-associated cutaneous manifestations have been described, including angiitis, acrodermatitis (acroangiitis), papular-vesicular eruptions, papular-squamous eruptions, pityriasis rosea, measles-like rash, toxicoderma, exacerbation of chronic dermatoses, artifactual skin lesions and, finally, hair loss. A number of studies demonstrate a link between androgens involved in the pathogenesis of COVID-19 and the possible occurrence of AA.
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Ntshingila S, Khumalo NP, Engel M, Arowolo AT. An appraisal of laboratory models of androgenetic alopecia: A systematic review. SKIN HEALTH AND DISEASE 2021; 1:e15. [PMID: 35664985 PMCID: PMC9060143 DOI: 10.1002/ski2.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 01/04/2021] [Accepted: 01/05/2021] [Indexed: 12/20/2022]
Abstract
Background Androgenetic alopecia (AGA) is the most common form of non‐scarring alopecia in humans. Several studies have used different laboratory models to study the pathogenesis and interventions for AGA. These study models have proved beneficial and have led to the approval of two drugs. However, the need to build on existing knowledge remains by examining the relevance of study models to the disease. Objective We sought to appraise laboratory or pre‐clinical models of AGA. Method We searched through databases (PubMed, ScienceDirect, Web of Science, World CAT, Scopus and Google Scholar) for articles on AGA‐related studies from 1942 to March 2019 with a focus on study models. Results The search rendered 101 studies after screening and deduplication. Several studies (70) used in vitro models, mostly consisting of two‐dimensional monolayer cells for experiments involving the characterization of androgen and 5‐alpha reductase (5AR) and inhibition thereof, the effects of dihydrotestosterone (DHT) and biomarker(s) of AGA. Twenty‐seven studies used in vivo models of mice and monkeys to investigate DHT synthesis, the expression and inhibition of 5AR and hair growth. Only four studies used AGA‐related or healthy excisional/punch biopsy explants as ex vivo models to study the action of 5AR inhibitors and AGA‐associated genes. No study used three‐dimensional [3‐D] organoids or organotypic human skin culture models. Conclusion We recommend clinically relevant laboratory models like human or patient‐derived 3‐D organoids or organotypic skin in AGA‐related studies. These models are closer to human scalp tissue and minimize the use of laboratory animals and could ultimately facilitate novel therapeutics.
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Affiliation(s)
- S. Ntshingila
- Hair and Skin Research Laboratory Division of Dermatology Department of Medicine Faculty of Health Sciences and Groote Schuur Hospital University of Cape Town Cape Town South Africa
| | - N. P. Khumalo
- Hair and Skin Research Laboratory Division of Dermatology Department of Medicine Faculty of Health Sciences and Groote Schuur Hospital University of Cape Town Cape Town South Africa
| | - M. Engel
- Department of Medicine Faculty of Health Sciences and Groote Schuur Hospital University of Cape Town Cape Town South Africa
| | - A. T. Arowolo
- Hair and Skin Research Laboratory Division of Dermatology Department of Medicine Faculty of Health Sciences and Groote Schuur Hospital University of Cape Town Cape Town South Africa
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Kim D, Park S. Pharmacological therapeutics in androgenetic alopecia. JOURNAL OF THE KOREAN MEDICAL ASSOCIATION 2020. [DOI: 10.5124/jkma.2020.63.5.277] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Androgenetic alopecia (AGA) is the most common type of hair loss and affects both men and women. Male pattern hair loss shows characteristic frontal recession and vertex baldness, whereas female pattern hair loss produces diffuse alopecia over the mid-frontal scalp. AGA is mediated by increased androgen susceptibility in affected scalp hairs. 5α-Reductase converts testosterone into dihydrotestosterone, a potent androgen, in the scalp. Both androgen receptors and 5α-reductase have higher expression levels in the balding scalp than in non-affected regions. Increased androgen susceptibility induces hair follicle miniaturization, which leads to the progressive loss of thicker terminal hairs in the balding scalp. Currently, topical minoxidil and oral 5α-reductase inhibitors, such as finasteride and dutasteride, are approved options for the pharmacological treatment of AGA. Topical minoxidil remains the mainstay of therapy for mild to moderate AGA in both men and women. The daily intake of 1-mg finasteride or 0.5-mg dutasteride shows better efficacy than topical minoxidil in regard to hair regrowth in male AGA. Anti-androgens can be used in female AGA wit clinical and biochemical evidence of hyperandrogenism. Patients may be overwhelmed and confused by the variety of treatment options for AGA management, including over-the-count drugs with low evidence quality. Therefore, physicians must be aware of the current guidelines for the management of AGA based on evidence-based approaches to select better options for patients.
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8
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Visconti M, Haidari W, Feldman S. Therapeutic use of caffeine in dermatology: A literature review. JOURNAL OF DERMATOLOGY & DERMATOLOGIC SURGERY 2020. [DOI: 10.4103/jdds.jdds_52_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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9
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Hosking AM, Juhasz M, Atanaskova Mesinkovska N. Complementary and Alternative Treatments for Alopecia: A Comprehensive Review. Skin Appendage Disord 2018; 5:72-89. [PMID: 30815439 DOI: 10.1159/000492035] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 07/10/2018] [Indexed: 12/29/2022] Open
Abstract
The treatment of alopecia is limited by a lack of therapies that induce and sustain disease remission. Given the negative psychosocial impact of hair loss, patients that do not see significant hair restoration with conventional therapies often turn to complementary and alternative medicine (CAM). Although there are a variety of CAM treatment options on the market for alopecia, only a few are backed by multiple randomized controlled trials. Further, these modalities are not regulated by the Food and Drug Administration and there is a lack of standardization of bioactive in gredients in over-the-counter vitamins, herbs, and supplements. In this article, we provide a comprehensive review of the efficacy, safety, and tolerability of CAM, including natural products and mind and body practices, in the treatment of hair loss. Overall, there is a need for additional studies investigating CAM for alopecia with more robust clinical design and standardized, quantitative outcomes.
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Affiliation(s)
- Anna-Marie Hosking
- Department of Dermatology, University of California, Irvine, Irvine, California, USA
| | - Margit Juhasz
- Department of Dermatology, University of California, Irvine, Irvine, California, USA
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Androgenic alopecia, premature graying, and hair thinning as independent predictors of coronary artery disease in young Asian males. Cardiovasc Endocrinol 2017; 6:152-158. [PMID: 31646132 DOI: 10.1097/xce.0000000000000136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 10/11/2017] [Indexed: 11/26/2022] Open
Abstract
We herewith aimed to explore the association of premature graying, androgenic alopecia (AGA), and hair thinning with coronary artery disease (CAD) in young (≤40 years) male individuals from Western India. Patients and methods In this prospective, case-control study, 1380 male individuals from a super speciality cardiac care center were enrolled, of which 468 were established cases of CAD and 912 were age-matched healthy male individuals not having history of any major illness including CAD. Details of demographics, cardiovascular risk factors, and cutaneous markers were collected for both the groups. Results Prevalence of hypertension (30.3 vs. 13.6%), obesity (28.8 vs. 12.2%), hair thinning (36.3 vs. 14.6%), premature graying (49.6 vs. 29.9%), AGA (49.1 vs. 27.4%), and lipid abnormalities (total cholesterol - 16.7 vs. 8.8%; low-density lipoprotein - 7.3 vs. 2.2%; and high-density lipoprotein - 92.5 vs. 88.7%) were higher in cases as compared with control. Multiple logistic regression analysis showed that AGA [5.619, 95% confidence interval (CI): 4.025-7.845, P<0.0001] is the strongest predictor of CAD among young Asian male individuals, closely followed by premature graying (5.267, 95% CI: 3.716-7.466, P<0.0001), obesity (4.133, 95% CI: 2.839-6.018, P<0.0001), and hair thinning (3.36, 95% CI: 2.452-4.621, P<0.0001). SYNTAX score, left ventricle ejection fraction, and degree of disease severity were also found to be independent associates of premature graying and AGA. Conclusion Our findings support the hypothesis that cutaneous markers are independently associated with underlying CAD irrespective of other classical cardiovascular risk factors. This, in combination with classical markers, could be effectively used for early identification and risk stratification of young patients with occult or established CAD.
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Abstract
Hair loss is a common condition that affects most people at some point in their lives. It can exist as an isolated problem or with other diseases and conditions. Androgenetic alopecia (AGA) and its association with the metabolic syndrome (MetS) have received increasing interest since 1972, when the first link between cardiovascular risk factors and hair loss was raised. We have reviewed studies concerning the relationship between alopecia and MetS. Many studies have investigated the relationship among AGA and MetS and its individual components, particularly in men, where a disproportionately large number of these studies supports this association. AGA has also been associated with other metabolic-related conditions, including coronary artery disease, polycystic ovary syndrome, and Cushing syndrome, as well as several nutritional deficiencies, all of which have led to many clinicians advocating for the screening of MetS and cardiovascular risk factors in patients who present with AGA.
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12
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Guo H, Gao WV, Endo H, McElwee KJ. Experimental and early investigational drugs for androgenetic alopecia. Expert Opin Investig Drugs 2017; 26:917-932. [DOI: 10.1080/13543784.2017.1353598] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Hongwei Guo
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, Canada
- Department of Dermatology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Wendi Victor Gao
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, Canada
| | - Hiromi Endo
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, Canada
- Department of Dermatology, Ohashi Hospital, Toho University, Tokyo, Japan
| | - Kevin John McElwee
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, Canada
- Vancouver Coastal Health Research Institute, Vancouver, Canada
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Huang WY, Huang YC, Huang KS, Chan CC, Chiu HY, Tsai RY, Chan JY, Lin SJ. Stress-induced premature senescence of dermal papilla cells compromises hair follicle epithelial-mesenchymal interaction. J Dermatol Sci 2017; 86:114-122. [DOI: 10.1016/j.jdermsci.2017.01.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 11/24/2016] [Accepted: 01/05/2017] [Indexed: 12/11/2022]
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Abstract
The hormonal stimulation for the purpose of penile enlargement before the hypospadias repair has been commonly used, but rarely reported. In addition to functional outcome, dihydrotestosterone (DHT) pretreatment has been suggested to improve cosmetic outcome in a preliminary randomized study. Since the randomized and controlled clinical trials on this topic are insufficient, the hormonal agent, the route of administration, dosing schedule, and the timing of treatment has been remained controversial. In order to confirm the efficiency of hormonal treatment, further well designed randomized studies with a larger number of patients and a placebo group are warranted.
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Affiliation(s)
- Cevdet Kaya
- 1 Department of Urology, Marmara University, School of Medicine, Istanbul, Turkey ; 2 Department of Pediatric Urology, Medical University of Innsbruck, Innsbruck, Austria
| | - Christian Radmayr
- 1 Department of Urology, Marmara University, School of Medicine, Istanbul, Turkey ; 2 Department of Pediatric Urology, Medical University of Innsbruck, Innsbruck, Austria
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Zhang H, Zhu NX, Huang K, Cai BZ, Zeng Y, Xu YM, Liu Y, Yuan YP, Lin CM. iTRAQ-Based Quantitative Proteomic Comparison of Early- and Late-Passage Human Dermal Papilla Cell Secretome in Relation to Inducing Hair Follicle Regeneration. PLoS One 2016; 11:e0167474. [PMID: 27907131 PMCID: PMC5132394 DOI: 10.1371/journal.pone.0167474] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 11/15/2016] [Indexed: 02/05/2023] Open
Abstract
Alopecia is an exceedingly prevalent problem that lacks effective therapy. Recently, research has focused on early-passage dermal papilla cells (DPCs), which have hair inducing activity both in vivo and in vitro. Our previous study indicated that factors secreted from early-passage DPCs contribute to hair follicle (HF) regeneration. To identify which factors are responsible for HF regeneration and why late-passage DPCs lose this potential, we collected 48-h-culture medium (CM) from both of passage 3 and 9 DPCs, and subcutaneously injected the DPC-CM into NU/NU mice. Passage 3 DPC-CM induced HF regeneration, based on the emergence of a white hair coat, but passage 9 DPC-CM did not. In order to identify the key factors responsible for hair induction, CM from passage 3 and 9 DPCs was analyzed by iTRAQ-based quantitative proteomic technology. We identified 1360 proteins, of which 213 proteins were differentially expressed between CM from early-passage vs. late-passage DPCs, including SDF1, MMP3, biglycan and LTBP1. Further analysis indicated that the differentially-expressed proteins regulated the Wnt, TGF-β and BMP signaling pathways, which directly and indirectly participate in HF morphogenesis and regeneration. Subsequently, we selected 19 proteins for further verification by multiple reaction monitoring (MRM) between the two types of CM. These results indicate DPC-secreted proteins play important roles in HF regeneration, with SDF1, MMP3, biglycan, and LTBP1 being potential key inductive factors secreted by dermal papilla cells in the regeneration of hair follicles.
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Affiliation(s)
- Huan Zhang
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong, China
| | - Ning-Xia Zhu
- Department of Cardiology, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Keng Huang
- Emergency Department, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Bo-Zhi Cai
- Tissue Engineering Laboratory, First Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Yang Zeng
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong, China
| | - Yan-Ming Xu
- Laboratory of Cancer Biology and Epigenetics, Department of Cell Biology and Genetics, Shantou University Medical College, Shantou, Guangdong, China
| | - Yang Liu
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong, China
| | - Yan-Ping Yuan
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong, China
| | - Chang-Min Lin
- Department of Histology and Embryology, Shantou University Medical College, Shantou, Guangdong, China
- * E-mail:
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Park GH, Park KY, Cho HI, Lee SM, Han JS, Won CH, Chang SE, Lee MW, Choi JH, Moon KC, Shin H, Kang YJ, Lee DH. Red ginseng extract promotes the hair growth in cultured human hair follicles. J Med Food 2014; 18:354-62. [PMID: 25396716 DOI: 10.1089/jmf.2013.3031] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Ginseng has been shown to promote hair growth in several recent studies. However, its effects on human hair follicles and its mechanisms of action have not been sufficiently elucidated. This study aimed to investigate the hair growth-promoting effects of red ginseng extract (RGE) and its ginsenosides. The proliferative activities of cultured human hair follicles treated with RGE and ginsenoside-Rb1 were assessed using Ki-67 immunostaining. Their effects on isolated human dermal papilla cells (hDPCs) were evaluated using cytotoxicity assays, immunoblot analysis of signaling proteins, and the determination of associated growth factors. We examined the ability of RGE and ginsenosides to protect hair matrix keratinocyte proliferation against dihydrotestosterone (DHT)-induced suppression and their effects on the expression of androgen receptor. The in vivo hair growth-promoting effect of RGE was also investigated in C57BL/6 mice. Both RGE and ginsenoside-Rb1 enhanced the proliferation of hair matrix keratinocytes. hDPCs treated with RGE or ginsenoside-Rb1 exhibited substantial cell proliferation and the associated phosphorylation of ERK and AKT. Moreover, RGE, ginsenoside-Rb1, and ginsenoside-Rg3 abrogated the DHT-induced suppression of hair matrix keratinocyte proliferation and the DHT-induced upregulation of the mRNA expression of androgen receptor in hDPCs. Murine experiments revealed that the subcutaneous injection of 3% RGE resulted in more rapid hair growth than the negative control. In conclusion, RGE and its ginsenosides may enhance hDPC proliferation, activate ERK and AKT signaling pathways in hDPCs, upregulate hair matrix keratinocyte proliferation, and inhibit the DHT-induced androgen receptor transcription. These results suggest that red ginseng may promote hair growth in humans.
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Affiliation(s)
- Gyeong-Hun Park
- 1 Department of Dermatology, Dongtan Sacred Heart Hospital, Hallym University College of Medicine , Hwaseong, Korea
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17
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Shin H, Yoo HG, Inui S, Itami S, Kim IG, Cho AR, Lee DH, Park WS, Kwon O, Cho KH, Won CH. Induction of transforming growth factor-beta 1 by androgen is mediated by reactive oxygen species in hair follicle dermal papilla cells. BMB Rep 2014; 46:460-4. [PMID: 24064061 PMCID: PMC4133876 DOI: 10.5483/bmbrep.2013.46.9.228] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The progression of androgenetic alopecia is closely related to androgen-inducible transforming growth factor (TGF)-β1 secretion by hair follicle dermal papilla cells (DPCs) in bald scalp. Physiological levels of androgen exposure were reported to increase reactive oxygen species (ROS) generation. In this study, rat vibrissae dermal papilla cells (DP-6) transfected with androgen receptor showed increased ROS production following androgen treatment. We confirmed that TGF-β1 secretion is increased by androgen treatment in DP-6, whereas androgeninducible TGF-β1 was significantly suppressed by the ROSscavenger, N-acetyl cysteine. Therefore, we suggest that induction of TGF-β1 by androgen is mediated by ROS in hair follicle DPCs. [BMB Reports 2013; 46(9): 460-464]
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Affiliation(s)
- Hyoseung Shin
- Department of Dermatology, Institute of Human-Environment Interface Biology, College of Medicine, Seoul National University, Seoul 110-744, Korea
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Sharma L, Dubey A, Gupta PR, Agrawal A. Androgenetic alopecia and risk of coronary artery disease. Indian Dermatol Online J 2013; 4:283-7. [PMID: 24350006 PMCID: PMC3853891 DOI: 10.4103/2229-5178.120638] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Background: Androgenetic alopecia (AGA) or male pattern baldness (MPB) has been found to be associated with the risk of coronary artery disease (CAD). The well-known risk factors are family history of CAD, hypertension, increased body mass index (BMI), central obesity, hyperglycemia, and dyslipidemia. The newer risk factors are serum lipoprotein-a (SL-a), serum homocysteine (SH), and serum adiponectin (SA). Aim: Identifying individuals at risk of CAD at an early age might help in preventing CAD and save life. Hence, a comparative study of CAD risk factors was planned in 100 males of AGA between the age of 25 and 40 years with equal number of age- and sex-matched controls. Materials and Methods: Patients of AGA grade II or more of Hamilton and Norwood (HN) Scale and controls were examined clinically and advised blood test. The reports were available for fasting blood sugar (FBS), serum total serum cholesterol (SC) in 64 cases, 64 controls; lipoproteins (high, low, very low density, HDL, LDL, VLDL), serum triglycerides (ST) in 63 cases, 63 controls; SL-a in 63 cases, 74 controls; SH in 56 cases, 74 controls; and SA in 62 cases, 74 controls. Results: In these cases family history (FH) of AGA and CAD was significantly high. The blood pressure (BP) was also found to be significantly high in the cases. The difference of mean serum HDL, LDL, VLDL, ST, SH, and SL-a in cases and controls were statistically significant and with increasing grade of AGA, the risk factors also increased. Conclusion: Patients with AGA appear to be at an increased risk of developing CAD, therefore, clinical evaluation of cases with AGA of grade II and above may be of help in preventing CAD in future.
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Affiliation(s)
- Lata Sharma
- Department of Dermatology and Venereology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Ajay Dubey
- Department of Dermatology and Venereology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - P R Gupta
- Department of Cardiology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Aruna Agrawal
- Department of Siddhant Darshan, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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Moon PG, Kwack MH, Lee JE, Cho YE, Park JH, Hwang D, Kim MK, Kim JC, Sung YK, Baek MC. Proteomic analysis of balding and non-balding mesenchyme-derived dermal papilla cells from androgenetic alopecia patients using on-line two-dimensional reversed phase-reversed phase LC–MS/MS. J Proteomics 2013; 85:174-91. [DOI: 10.1016/j.jprot.2013.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 03/15/2013] [Accepted: 04/04/2013] [Indexed: 01/20/2023]
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20
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Chueh SC, Lin SJ, Chen CC, Lei M, Wang LM, Widelitz R, Hughes MW, Jiang TX, Chuong CM. Therapeutic strategy for hair regeneration: hair cycle activation, niche environment modulation, wound-induced follicle neogenesis, and stem cell engineering. Expert Opin Biol Ther 2013; 13:377-91. [PMID: 23289545 PMCID: PMC3706200 DOI: 10.1517/14712598.2013.739601] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION There are major new advancements in the fields of stem cell biology, developmental biology, regenerative hair cycling, and tissue engineering. The time is ripe to integrate, translate, and apply these findings to tissue engineering and regenerative medicine. Readers will learn about new progress in cellular and molecular aspects of hair follicle development, regeneration, and potential therapeutic opportunities these advances may offer. AREAS COVERED Here, we use hair follicle formation to illustrate this progress and to identify targets for potential strategies in therapeutics. Hair regeneration is discussed in four different categories: i) Intra-follicle regeneration (or renewal) is the basic production of hair fibers from hair stem cells and dermal papillae in existing follicles. ii) Chimeric follicles via epithelial-mesenchymal recombination to identify stem cells and signaling centers. iii) Extra-follicular factors including local dermal and systemic factors can modulate the regenerative behavior of hair follicles, and may be relatively easy therapeutic targets. iv) Follicular neogenesis means the de novo formation of new follicles. In addition, scientists are working to engineer hair follicles, which require hair-forming competent epidermal cells and hair-inducing dermal cells. EXPERT OPINION Ideally self-organizing processes similar to those occurring during embryonic development should be elicited with some help from biomaterials.
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22
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hMSCs possess the potential to differentiate into DP cells in vivo and in vitro. CELL BIOLOGY INTERNATIONAL REPORTS 2012; 19:e00019. [PMID: 23124633 PMCID: PMC3475446 DOI: 10.1042/cbr20120003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Accepted: 06/28/2012] [Indexed: 02/07/2023]
Abstract
DP (dermal papilla) is a mesenchyme-derived structure situated at the
base of the HF (hair follicle) that plays an important role in
embryonic hair morphogenesis and maintenance of the hair growth cycle.
hMSCs (human mesenchymal stem cells) have gained widespread attention
in the field of tissue engineering, but not much is known about the
differentiation of hMSCs into DP cells. hMSCs involved in HF formation
were examined in our previous study. Here, we have explored the
differentiation potential of hMSCs into DP cells by co-culturing hMSCs
with DP cells, which proved to be the case. During the differentiation
process, the expression of versican, CD133, SCF (stem cell factor),
ET-1 (endothelin-1) and bFGF (basic fibroblast growth factor)
increased. Compared with hMSCs alone, the aggregate number clearly
increased when co-cultured with DP cells. The expression in
vivo of HLA-I (human leucocyte antigen class I) was
confined to DP of the newly formed HF. The data suggest that hMSCs
possess the potential to differentiate into DP cells in
vivo and in vitro.
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Key Words
- DMEM, Dulbecco's minimum essential medium
- DP, dermal papilla
- ET-1, endothelin-1
- FBS, fetal bovine serum
- H&E, haematoxylin and eosin
- HF, hair follicle
- HLA-I, human leucocyte antigen class 1
- RT–PCR, reverse transcription–PCR
- SCF, stem cell factor
- bFGF, basic fibroblast growth factor
- co-culture
- dermal papilla cells
- differentiation
- hMSC, human mesenchymal stem cell
- hair follicle
- human mesenchymal stem cells
- α-SMA, α-smooth muscle actin
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Won CH, Kwon OS, Kang YJ, Yoo HG, Lee DH, Chung JH, Kim KH, Park WS, Park NH, Cho K, Kwon SO, Choi JS, Eun HC. Comparative secretome analysis of human follicular dermal papilla cells and fibroblasts using shotgun proteomics. BMB Rep 2012; 45:253-8. [PMID: 22531137 DOI: 10.5483/bmbrep.2012.45.4.253] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The dermal papilla cells (DPCs) of hair follicles are known to secrete paracrine factors for follicular cells. Shotgun proteomic analysis was performed to compare the expression profiles of the secretomes of human DPCs and dermal fibroblasts (DFs). In this study, the proteins secreted by DPCs and matched DFs were analyzed by 1DE/LTQ FTICR MS/MS, semi-quantitatively determined using emPAI mole percent values and then characterized using protein interaction network analysis. Among the 1,271 and 1,188 proteins identified in DFs and DPCs, respectively, 1,529 were further analyzed using the Ingenuity Pathway Analysis tool. We identified 28 DPC-specific extracellular matrix proteins including transporters (ECM1, A2M), enzymes (LOX, PON2), and peptidases (C3, C1R). The biochemically- validated DPC-specific proteins included thrombospondin 1 (THBS1), an insulin-like growth factor binding protein3 (IGFBP3), and, of particular interest, an integrin beta1 subunit (ITGB1) as a key network core protein. Using the shotgun proteomic technique and network analysis, we selected ITGB1, IGFBP3, and THBS1 as being possible hair-growth modulating protein biomarkers.
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Affiliation(s)
- Chong Hyun Won
- Department of Dermatology, College of Medicine, Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
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24
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Leirós GJ, Attorresi AI, Balañá ME. Hair follicle stem cell differentiation is inhibited through cross-talk between Wnt/β-catenin and androgen signalling in dermal papilla cells from patients with androgenetic alopecia. Br J Dermatol 2012; 166:1035-42. [PMID: 22283397 DOI: 10.1111/j.1365-2133.2012.10856.x] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Hair follicle (HF) regeneration begins when signals from the mesenchyme-derived dermal papilla cells (DPC) reach multipotent epidermal stem cells in the bulge region. Wnt/β-catenin signalling is known to affect mammalian hair growth positively. In androgenetic alopecia (AGA), androgens cause HF miniaturization through a mechanism that remains unclear. Circulating androgens act on DPC and alter paracrine factors that influence hair epithelial cells. OBJECTIVES To elucidate the role of androgens in dermal papilla-induced differentiation of HF stem cells. METHODS HF stem cell differentiation was evaluated in a coculture model with DPC or culturing with media conditioned by DPC after activation of androgen and Wnt/β-catenin signalling pathways. To study the molecular cross-talk between the androgen and Wnt signalling pathway in DPC, we analysed the expression and activation of downstream Wnt signalling molecules in the presence of androgens. RESULTS In a coculture model with human DPC from patients with AGA and HF stem cells, we observed that androgens abrogate hair differentiation evaluated by hair-specific keratin 6 expression. Wnt signalling activation restored the ability of androgen-treated DPC to induce differentiation. Androgen treatment revealed a significant decrease in the cytoplasmic/total β-catenin protein ratio and upregulation of the activity of glycogen synthase kinase-3β in DPC, indicative of canonical Wnt pathway inhibition. CONCLUSIONS These results suggest that androgens deregulate DPC-secreted factors involved in normal HF stem cell differentiation via the inhibition of the canonical Wnt signalling pathway.
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Affiliation(s)
- G J Leirós
- Fundación Pablo Cassará, Instituto de Ciencia y Tecnología Dr César Milstein, Consejo Nacional de Investigaciones Científicas y Técnicas, Ciudad de Buenos Aires, Argentina
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25
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Dihydrotestosterone-Inducible IL-6 Inhibits Elongation of Human Hair Shafts by Suppressing Matrix Cell Proliferation and Promotes Regression of Hair Follicles in Mice. J Invest Dermatol 2012; 132:43-9. [DOI: 10.1038/jid.2011.274] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Kwack MH, Kim MK, Kim JC, Sung YK. I-Ascorbic acid 2-phosphate represses the dihydrotestosterone-induced dickkopf-1 expression in human balding dermal papilla cells. Exp Dermatol 2010; 19:1110-2. [DOI: 10.1111/j.1600-0625.2010.01143.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Kwack MH, Ahn JS, Kim MK, Kim JC, Sung YK. Preventable effect of L-threonate, an ascorbate metabolite, on androgen-driven balding via repression of dihydrotestosteroneinduced dickkopf-1 expression in human hair dermal papilla cells. BMB Rep 2010; 43:688-92. [DOI: 10.5483/bmbrep.2010.43.10.688] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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28
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Yang CC, Cotsarelis G. Review of hair follicle dermal cells. J Dermatol Sci 2010; 57:2-11. [PMID: 20022473 DOI: 10.1016/j.jdermsci.2009.11.005] [Citation(s) in RCA: 284] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Accepted: 11/30/2009] [Indexed: 12/16/2022]
Abstract
Hair follicle stem cells in the epithelial bulge are responsible for the continual regeneration of the hair follicle during cycling. The bulge cells reside in a niche composed of dermal cells. The dermal compartment of the hair follicle consists of the dermal papilla and dermal sheath. Interactions between hair follicle epithelial and dermal cells are necessary for hair follicle morphogenesis during development and in hair reconstitution assays. Dermal papilla and dermal sheath cells express specific markers and possess distinctive morphology and behavior in culture. These cells can induce hair follicle differentiation in epithelial cells and are required in hair reconstitution assays either in the form of intact tissue, dissociated freshly prepared cells or cultured cells. This review will focus on hair follicle dermal cells since most therapeutic efforts to date have concentrated on this aspect of the hair follicle, with the idea that enriching hair-inductive dermal cell populations and expanding their number by culture while maintaining their properties, will establish an efficient hair reconstitution assay that could eventually have therapeutic implications.
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Affiliation(s)
- Chao-Chun Yang
- Department of Dermatology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
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29
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Alexandroff A, Burd R. Footprints of the EADV: a meeting report from the 17th Congress of the European Academy of Dermatology and Venereology. Br J Dermatol 2009; 160:938-45. [DOI: 10.1111/j.1365-2133.2009.09107.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Abstract
Hair's importance in human communication means that abnormalities like excess hair in hirsutism or hair loss in alopecia cause psychological distress. Androgens are the main regulator of human hair follicles, changing small vellus follicles producing tiny, virtually invisible hairs into larger intermediate and terminal follicles making bigger, pigmented hairs. The response to androgens varies with the body site as it is specific to the hair follicle itself. Normally around puberty, androgens stimulate axillary and pubic hair in both sexes, plus the beard, etc. in men, while later they may also inhibit scalp hair growth causing androgenetic alopecia. Androgens act within the follicle to alter the mesenchyme-epithelial cell interactions, changing the length of time the hair is growing, the dermal papilla size and dermal papilla cell, keratinocyte and melanocyte activity. Greater understanding of the mechanisms of androgen action in follicles should improve therapies for poorly controlled hair disorders like hirsutism and alopecia.
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Affiliation(s)
- Valerie Anne Randall
- Centre for Skin Sciences, School of Life Sciences, University of Bradford, Bradford, UK.
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31
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Roth CC, Frimberger D, Kropp BP. Re: The efficacy of dihydrotestosterone transdermal gel before primary hypospadias surgery: a prospective, controlled, randomized study. J Urol 2008; 180:786; author reply 786-7. [PMID: 18630338 DOI: 10.1016/j.juro.2008.04.054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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32
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Premature Senescence of Balding Dermal Papilla Cells In Vitro Is Associated with p16INK4a Expression. J Invest Dermatol 2008; 128:1088-94. [DOI: 10.1038/sj.jid.5701147] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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33
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Kwack MH, Sung YK, Chung EJ, Im SU, Ahn JS, Kim MK, Kim JC. Dihydrotestosterone-inducible dickkopf 1 from balding dermal papilla cells causes apoptosis in follicular keratinocytes. J Invest Dermatol 2007; 128:262-9. [PMID: 17657240 DOI: 10.1038/sj.jid.5700999] [Citation(s) in RCA: 151] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recent studies suggest that androgen-driven alteration to the autocrine and paracrine factors produced by scalp dermal papilla (DP) cells may be a key to androgen-potentiated balding. Here, we screened dihydrotestosterone (DHT)-regulated genes in balding DP cells and found that dickkopf 1 (DKK-1) is one of the most upregulated genes. DKK-1 messenger RNA is upregulated in 3-6 hours after 50-100 nM DHT treatment and ELISA showed that DKK-1 is secreted from DP cells in response to DHT. A co-culture system using outer root sheath (ORS) keratinocytes and DP cells showed that DHT inhibits the growth of ORS cells, and neutralizing antibody against DKK-1 significantly reversed the growth inhibition of ORS cells. Analysis of co-cultured ORS cells showed a significant increment of sub-G1 apoptotic cells in response to DHT. Also, recombinant human DKK-1 inhibited the growth of ORS cells and triggered apoptotic cell death. In addition, DHT-induced epithelial cell death in cultured hair follicles was reversed by neutralizing DKK-1 antibody. Moreover, immunoblotting showed that the DKK-1 level is up in the bald scalp compared with the haired scalp of patients with androgenetic alopecia. Altogether, our data strongly suggest that DHT-inducible DKK-1 is involved in DHT-driven balding.
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Affiliation(s)
- Mi Hee Kwack
- Department of Immunology, School of Medicine, Kyungpook National University, Daegu, Korea
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34
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Inui S, Fukuzato Y, Nakajima T, Kurata S, Itami S. Androgen receptor co-activator Hic-5/ARA55 as a molecular regulator of androgen sensitivity in dermal papilla cells of human hair follicles. J Invest Dermatol 2007; 127:2302-6. [PMID: 17508020 DOI: 10.1038/sj.jid.5700883] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Androgen site-specifically affects human hair growth after puberty through androgen receptors in the dermal papilla, which transactivate target genes acting in conjunction with co-activators. To examine the regulation of androgen sensitivity in hair follicles, we focused on androgen receptor co-activator Hic-5/ARA55. Its interaction with transfected androgen receptor in beard dermal papilla cells was confirmed with mammalian two-hybrid assays. The semiquantitative reverse transcriptase-polymerase chain reaction showed that Hic-5/ARA55 mRNA expression was high in dermal papilla cells from the beard and bald frontal scalp but low in cells from the occipital scalp. To determine whether Hic-5/ARA55 mRNA level correlates with its endogenous activity, we studied the effect of dominant negative Hic-5/ARA55 on transfected androgen receptor transactivation induced by R1881 using mouse mammary tumor virus-luciferase assays. We found that it suppressed the transactivation by 64.5 and 71.4% in dermal papilla cells from the beard and bald frontal scalp, respectively, whereas it showed no significant effect in cells from the occipital scalp. Our findings suggest that Hic-5/ARA55 is a molecular regulator for androgen sensitivity in human hair follicles.
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Affiliation(s)
- Shigeki Inui
- Department of Regenerative Dermatology, Graduate School of Medicine, Osaka University, Osaka, Japan
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35
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Randall VA. Hormonal regulation of hair follicles exhibits a biological paradox. Semin Cell Dev Biol 2007; 18:274-85. [PMID: 17379547 DOI: 10.1016/j.semcdb.2007.02.004] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2006] [Revised: 02/03/2007] [Accepted: 02/05/2007] [Indexed: 12/22/2022]
Abstract
Hair's importance for insulation and camouflage or human communication means that hairs need to change with season, age or sexual development. Regular, regenerating hair follicle growth cycles produce new hairs which may differ in colour and/or size, e.g., beard development. Hormones of the pineal-hypothalamus-pituitary axis coordinate seasonal changes, while androgens regulate most sexual aspects with paradoxically different effects depending on body site; compare beard growth and balding! Hormones affect follicular mesenchymal-epithelial interactions altering growing time, dermal papilla size and dermal papilla cell, keratinocyte and melanocyte activity. Greater understanding of these mechanisms should improve treatments for poorly controlled hair disorders, alopecia and hirsutism.
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Affiliation(s)
- Valerie Anne Randall
- Division of Biomedical Sciences, The University of Bradford, Bradford BD7 1DP, UK.
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36
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Randall VA, Lanigan S, Hamzavi I, Chamberlain James L. New dimensions in Hirsutism. Lasers Med Sci 2006; 21:126-33. [PMID: 16874541 DOI: 10.1007/s10103-006-0387-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Accepted: 04/28/2006] [Indexed: 11/27/2022]
Abstract
The following is a review of a satellite symposium held at the British Medical Laser Association Meeting, in November 2005. Prof. V.A. Randall gave a comprehensive overview of hormones and hair growth, followed by an in-depth discussion of hirsutism, the therapeutic options, treatment and trends, by Dr. S. Lanigan. Dr. I. Hamzavi concluded the symposium with a presentation of the latest work on eflornithine in combination with laser hair removal. Data were reproduced with the speakers' permission.
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Affiliation(s)
- V A Randall
- Department of Biomedical Sciences, University of Bradford, Bradford, B7 1DP, UK.
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