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Lee SH, Platt S, Lim CH, Ito M, Myung P. The development of hair follicles and nail. Dev Biol 2024; 513:3-11. [PMID: 38759942 DOI: 10.1016/j.ydbio.2024.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 05/06/2024] [Accepted: 05/14/2024] [Indexed: 05/19/2024]
Abstract
The hair follicle and nail unit develop and regenerate through epithelial-mesenchymal interactions. Here, we review some of the key signals and molecular interactions that regulate mammalian hair follicle and nail formation during embryonic development and how these interactions are reutilized to promote their regeneration during adult homeostasis and in response to skin wounding. Finally, we highlight the role of some of these signals in mediating human hair follicle and nail conditions.
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Affiliation(s)
- Soung-Hoon Lee
- The Ronald O. Perelman Department of Dermatology and Department of Cell Biology, New York University School of Medicine, New York, NY, USA
| | - Sarah Platt
- Department of Dermatology, Yale School of Medicine, New Haven, CT, USA
| | - Chae Ho Lim
- The Ronald O. Perelman Department of Dermatology and Department of Cell Biology, New York University School of Medicine, New York, NY, USA
| | - Mayumi Ito
- The Ronald O. Perelman Department of Dermatology and Department of Cell Biology, New York University School of Medicine, New York, NY, USA
| | - Peggy Myung
- Department of Dermatology, Yale School of Medicine, New Haven, CT, USA; Department of Pathology, Yale School of Medicine, New Haven, CT, USA.
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2
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Wu X, Huang X, Zhu Q, Zhang J, Hu J, Song Y, You Y, Zhu L, Lu J, Xu X, Chen M, Wang W, Song X, Ji J, Du Y. Hybrid hair follicle stem cell extracellular vesicles co-delivering finasteride and gold nanoparticles for androgenetic alopecia treatment. J Control Release 2024; 373:S0168-3659(24)00524-8. [PMID: 39089503 DOI: 10.1016/j.jconrel.2024.07.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 07/23/2024] [Accepted: 07/27/2024] [Indexed: 08/04/2024]
Abstract
Androgenetic alopecia (AGA) is a non-fatal disease prevalent worldwide. However, mixed efficacy has been observed among different therapies for hair regrowth in AGA patients. Thus, a nano-platform with synergistic treatments based on a hybrid extracellular vesicle encapsulating gold nanoparticles (AuNPs) and finasteride (Hybrid/Au@Fi) was constructed through membrane fusion between hair follicle stem cell (HFSC)-derived extracellular vesicles and liposomes. These hybrid vesicles (HVs) not only fuel hair regrowth by providing cellular signals in extracellular vesicles, but also improve storage stability, follicle retention, and drug encapsulation efficiency (EE%) for finasteride inhibiting 5α-reductase, and nano-size AuNPs that simulate low-level laser therapy (LLLT) with similar photothermal effects in vitro. The EE% of finasteride in these HVs reached 45.33%. The dual administration of these extracellular vesicles and finasteride showed a strong synergistic effect on HFSCs in vitro. In an AGA mouse model, once-daily topical Hybrid/Au@Fi (115.07 ± 0.32 nm, -7.50 ± 1.68 mV) gel led to a faster transition of hair follicles (HFs) from the catagen to the anagen, increased hair regrowth coverage, and higher quality of regrowth hair, compared to once-daily 5% minoxidil treatment. Compared to topical minoxidil, the multifaceted synergistic therapy of Hybrid/Au@Fi through topical administration offers a new option for intractable AGA patients with low side effects.
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Affiliation(s)
- Xiaochuan Wu
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; Jinhua Institute of Zhejiang University, Jinhua 321299, China
| | - Xiajie Huang
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; Jinhua Institute of Zhejiang University, Jinhua 321299, China
| | - Qi Zhu
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; Jinhua Institute of Zhejiang University, Jinhua 321299, China
| | - Jucong Zhang
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jiahao Hu
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yanling Song
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yuchan You
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Luwen Zhu
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jingyi Lu
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xinyi Xu
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Minjiang Chen
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Lishui Central Hospital, Lishui 323000, China
| | - Wei Wang
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou 310009, Zhejiang, China
| | - Xiuzu Song
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou 310009, Zhejiang, China
| | - Jiansong Ji
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Lishui Central Hospital, Lishui 323000, China
| | - Yongzhong Du
- State Key Laboratory of Advanced Drug Delivery and Release Systems, Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; Jinhua Institute of Zhejiang University, Jinhua 321299, China.
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3
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Bazid HAS, Marae AH, Farag B, Abdallah RA. The value of immunohistochemical expression of SOX9 and CD34 in alopecia areata. J Immunoassay Immunochem 2024:1-15. [PMID: 39041618 DOI: 10.1080/15321819.2024.2383676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
BACKGROUND Alopecia areata (AA), an immune-mediated disorder, is marked by temporary, nonscarring hair loss. The bulge area is protected from immune attacks by immune privilege; however, recent studies demonstrated immune cells infiltrating the bulge area. OBJECTIVE This study aims to investigate the immunohistochemical expression of the sex-determining region Y-box 9 (SOX9) and cluster of differentiation 34 (CD34) in AA patients as markers of hair follicle stem cells (HFSCs) and progenitor cells, respectively. METHODS Immunohistochemical staining of SOX9 and CD34 was applied on skin samples of 20 AA patients and 20 healthy controls. RESULTS SOX9 and CD34 were significantly lower in lesional samples of cases compared to perilesional and control skin biopsies. Furthermore, SOX9 level was negatively correlated with the severity of alopecia tool score (SALT score) among the studied AA patients. Moreover, lowered SOX9 expression was present in patients with recurrent attacks. CONCLUSIONS The significant reduction of stem cell markers (SOX9 and CD34) in our studied AA cases signifies the pathological affection of HFSCs and their progeny in AA. This is thought to cause a loss of competence in generating new hair in some AA cases, which needs to be validated in further research. LIMITATIONS OF THE STUDY This study has a small sample size.
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Affiliation(s)
- Heba A S Bazid
- Dermatology and Andrology Department, Faculty of Medicine, Menoufia University, Shebeen El-Kom, Egypt
| | - Alaa H Marae
- Dermatology and Andrology Department, Faculty of Medicine, Menoufia University, Shebeen El-Kom, Egypt
| | - Bassant Farag
- Dermatology and Andrology Department, Faculty of Medicine, Menoufia University, Shebeen El-Kom, Egypt
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4
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Liu D, Xu Q, Meng X, Liu X, Liu J. Status of research on the development and regeneration of hair follicles. Int J Med Sci 2024; 21:80-94. [PMID: 38164355 PMCID: PMC10750333 DOI: 10.7150/ijms.88508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 10/17/2023] [Indexed: 01/03/2024] Open
Abstract
Hair loss, or alopecia, is a prevalent condition in modern society that imposes substantial mental and psychological burden on individuals. The types of hair loss, include androgenetic alopecia, alopecia areata, and telogen effluvium; of them, androgenetic alopecia is the most common condition. Traditional treatment modalities mainly involve medical options, such as minoxidil, finasteride and surgical interventions, such as hair transplantation. However, these treatments still have many limitations. Therefore, exploring the pathogenesis of hair loss, specifically focusing on the development and regeneration of hair follicles (HFs), and developing new strategies for promoting hair regrowth are essential. Some emerging therapies for hair loss have gained prominence; these therapies include low-level laser therapy, micro needling, fractional radio frequency, platelet-rich plasma, and stem cell therapy. The aforementioned therapeutic strategies appear promising for hair loss management. In this review, we investigated the mechanisms underlying HF development and regeneration. For this, we studied the structure, development, cycle, and cellular function of HFs. In addition, we analyzed the symptoms, types, and causes of hair loss as well as its current conventional treatments. Our study provides an overview of the most effective regenerative medicine-based therapies for hair loss.
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Affiliation(s)
| | | | | | - Xiaomei Liu
- Department of Toxicology, School of Public Health, Jilin University, Changchun 130021, China
| | - Jinyu Liu
- Department of Toxicology, School of Public Health, Jilin University, Changchun 130021, China
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5
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Singh S, Lian Q, Budiman T, Taketo MM, Simons BD, Gupta V. Heterogeneous murine peribiliary glands orchestrate compartmentalized epithelial renewal. Dev Cell 2023; 58:2732-2745.e5. [PMID: 37909044 PMCID: PMC10842076 DOI: 10.1016/j.devcel.2023.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 11/02/2023]
Abstract
The extrahepatic branches of the biliary tree have glands that connect to the surface epithelium through narrow pits. The duct epithelia undergo homeostatic renewal, yet the identity and multiplicity of cells that maintain this tissue is unknown. Using marker-free and targeted clonal fate mapping in mice, we provide evidence that the extrahepatic bile duct is compartmentalized. Pit cholangiocytes of extramural glands renewed the surface epithelium, whereas basally oriented cholangiocytes maintained the gland itself. In contrast, basally positioned cholangiocytes replenished the surface epithelium in mural glands. Single-cell sequencing identified genes enriched in the base and surface epithelial populations, with trajectory analysis showing graded gene expression between these compartments. Epithelia were plastic, changing cellular identity upon fasting and refeeding. Gain of canonical Wnt signaling caused basal cell expansion, gastric chief cell marker expression, and a decrease in surface epithelial markers. Our results identify the cellular hierarchy governing extrahepatic biliary epithelial renewal.
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Affiliation(s)
- Serrena Singh
- Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Qiuyu Lian
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, UK
| | - Tifanny Budiman
- Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Makoto M Taketo
- Kyoto University Hospital-iACT (Colon Cancer Project), Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Benjamin D Simons
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, UK; Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, Wilberforce Road, Cambridge CB3 0WA, UK; Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 0AW, UK
| | - Vikas Gupta
- Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA.
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Sumathy B, Velayudhan S. Fabrication and evaluation of a bi-layered gelatin based scaffold with arrayed micro-pits for full-thickness skin construct. Int J Biol Macromol 2023; 251:126360. [PMID: 37591428 DOI: 10.1016/j.ijbiomac.2023.126360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/17/2023] [Accepted: 08/14/2023] [Indexed: 08/19/2023]
Abstract
There is an unmet need for a reliable and reproducible method for incorporating hair follicle derived stem cells in tissue engineered skin models to reconstitute hair follicles. This study discloses a novel method for introducing hair follicle derived stem cells in microneedle embossed micro-pits of a bilayer skin equivalent fabricated from a gelatin based scaffold. The microneedles are hard and strong enough to penetrate the upper layer of the bilayer gelatin based scaffold that corresponds to the epidermis and permeates down to lower layer that corresponds to dermal layer. This strategic location will mimic the natural niche of hair follicle stem cells for picking up signals from both the epidermis and dermis. Hair follicle stem cells are trapped in to these micro-pits by vacuum assisted cell seeding. The bilayer system consists of two distinct electrospun layers in a single processing step, representing outer epidermal layer and inner dermal layer with hair follicle stem cells in embedded pits, resulting in the formation of a closed representation of a complete skin.
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Affiliation(s)
- Babitha Sumathy
- Department of Tissue Engineering and Regeneration Technologies, Department of Applied Biology, Biomedical Technology wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum 695 012, India.
| | - Shiny Velayudhan
- Division of Dental Products, Department of Biomaterials Science and Technology, Biomedical Technology wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum 695 012, India.
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7
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Abstract
Diseases affecting the hair follicle are common in domestic animals, but despite the importance of an intact skin barrier and a fully functional hair coat, knowledge about the detailed morphological features and the diversity of these complex mini-organs are often limited, although mandatory to evaluate skin biopsies with a history of alopecia. The factors that regulate the innate hair follicle formation and the postnatal hair cycle are still not completely understood in rodents, only rudimentarily known in humans, and are poorly understood in our companion animals. This review aims to summarize the current knowledge about hair follicle and hair shaft anatomy, the arrangement of hair follicles, hair follicle morphogenesis in the embryo, and the lifelong regeneration during the postnatal hair cycle in domestic animals. The role of follicular stem cells and the need for a multitude of interacting signaling events during hair follicle morphogenesis and regeneration is unquestioned. Because of the lack of state of the art methods that can be applied in rodents but are not feasible in companion animals, most of the information in this review is based on rodent studies. However, the few data from domestic animals that are available will be discussed, and it can be assumed that at least the principal molecular mechanisms are similar in rodents and other species.
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8
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Keister BD, Mesa KR, Blagoev KB. Apoptotic cells may drive cell death in hair follicles during their regression cycle. Oncotarget 2023; 14:893-899. [PMID: 37861373 PMCID: PMC10588663 DOI: 10.18632/oncotarget.28529] [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: 06/13/2023] [Accepted: 09/21/2023] [Indexed: 10/21/2023] Open
Abstract
Intravital microscopy in live mice has shown that the elimination of epithelial cells during hair follicle regression involves supra-basal cell differentiation and basal cell apoptosis through synergistic action of TGF-β (transforming growth factor) and mesenchymal-epithelial interactions. In this process the basal epithelial cells are not internally committed to death and the mesenchymal dermal papilla (DP) plays essential role in death induction. Because the DP cells are not necessary for completion of the cycle but only for its initiation it is still an open question what is the mechanism leading to the propagation of apoptosis towards the regenerative stem cell population. Here, we use a quantitative analysis of the length of hair follicles during their regression cycle. The data are consistent with a propagation mechanism driven by apoptotic cells inducing apoptosis in their neighboring cells. The observation that the apoptosis slows down as the apoptotic front approaches the stem cells at the end of the follicle is consistent with a gradient of a pro-survival signal sent by these stem cells. An experiment that can falsify this mechanism is proposed.
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Affiliation(s)
- Bradley D. Keister
- National Science Foundation, Physics Division, Alexandria, VA 22230, USA
| | - Kailin R. Mesa
- The Jane Coffin Childs Memorial Fund for Medical Research, New Haven, CT 06520, USA
- Department of Genetics and Dermatology, Yale Stem Cell Center, Yale Cancer Center, Yale School of Medicine, New Haven, CT 06510, USA
| | - Krastan B. Blagoev
- National Science Foundation, Physics Division, Alexandria, VA 22230, USA
- Department of Biophysics, Johns Hopkins University, Baltimore, MD 21218, USA
- Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
- Institut Curie, PSL Research University, Sorbonne Université, CNRS UMR3664, Laboratoire Dynamique du Noyau, Paris 75005, France
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9
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Stüfchen I, Beyer F, Staebler S, Fischer S, Kappelmann M, Beckervordersandforth R, Bosserhoff AK. Sox9 regulates melanocytic fate decision of adult hair follicle stem cells. iScience 2023; 26:106919. [PMID: 37283806 PMCID: PMC10239701 DOI: 10.1016/j.isci.2023.106919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 03/02/2023] [Accepted: 05/14/2023] [Indexed: 06/08/2023] Open
Abstract
The bulge of hair follicles harbors Nestin+ (neural crest like) stem cells, which exhibit the potential to generate various cell types including melanocytes. In this study, we aimed to determine the role of Sox9, an important regulator during neural crest development, in melanocytic differentiation of those adult Nestin+ cells. Immunohistochemical analysis after conditional Sox9 deletion in Nestin+ cells of adult mice revealed that Sox9 is crucial for melanocytic differentiation of these cells and that Sox9 acts as a fate determinant between melanocytic and glial fate. A deeper understanding of factors that regulate fate decision, proliferation and differentiation of these stem cells provides new aspects to melanoma research as melanoma cells share many similarities with neural crest cells. In summary, we here show the important role of Sox9 in melanocytic versus glial fate decision of Nestin+ stem cells in the skin of adult mice.
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Affiliation(s)
- Isabel Stüfchen
- Institute of Biochemistry, Friedrich-Alexander University of Erlangen-Nürnberg, Erlangen, Germany
| | - Felix Beyer
- Institute of Biochemistry, Friedrich-Alexander University of Erlangen-Nürnberg, Erlangen, Germany
| | - Sebastian Staebler
- Institute of Biochemistry, Friedrich-Alexander University of Erlangen-Nürnberg, Erlangen, Germany
| | - Stefan Fischer
- Faculty of Computer Science, Deggendorf Institute of Technology, Deggendorf, Germany
| | - Melanie Kappelmann
- Institute of Biochemistry, Friedrich-Alexander University of Erlangen-Nürnberg, Erlangen, Germany
- Faculty of Computer Science, Deggendorf Institute of Technology, Deggendorf, Germany
| | | | - Anja K. Bosserhoff
- Institute of Biochemistry, Friedrich-Alexander University of Erlangen-Nürnberg, Erlangen, Germany
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10
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Li Y, Jin M, Gao Y, Lu L, Cao J, Liu Y, Chen Y, Wang X. Efficient establishment of an optimized culture condition for cashmere goat primary hair follicle stem cells. J Anim Sci 2023; 101:skad235. [PMID: 37429584 PMCID: PMC10370882 DOI: 10.1093/jas/skad235] [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: 05/10/2023] [Accepted: 07/06/2023] [Indexed: 07/12/2023] Open
Abstract
Hair follicle stem cells (HFSCs) are an important basis for hair follicle morphogenesis and hair cycle growth. This cell type also represents an excellent model for studying the gene function and molecular regulation of the hair growth cycle, including proliferation, differentiation, and apoptosis. Basically, the functional investigation of hair growth-regulating genes demands a sufficient amount of HFSCs. However, efficient propagation of HFSCs in goats is a challenging process under the current culture conditions. Here, we investigated the effect of four components, including the Rho-associated protein kinase (ROCK) inhibitor Y-27632, leukemia inhibitory factor (LIF), basic fibroblast growth factor (bFGF), and vitamin C, on cell growth and pluripotency in the basal culture medium (DMEM/F12 supplemented with 2% fetal bovine serum). We found that adding Y-27632, LIF, and bFGF independently increased the proliferation and pluripotency of goat HFSCs (gHFSCs), with Y-27632 having the most significant effect (P < 0.001). Fluorescence-activated cell sorting of the cell cycle revealed that Y-27632 promoted gHFSC proliferation by inducing the cell cycle from S to G2/M phase (P < 0.05). We further demonstrated that gHFSCs displayed superior proliferative capacity, clone-forming ability, and differentiation potential in the combined presence of Y-27632 (10 μM) and bFGF (10 ng/mL). We termed this novel culture condition as gHFEM, which stands for goat Hair Follicle Enhanced Medium. Taken together, these results indicate that gHFEM is an optimal condition for in vitro culture of gHFSCs, which will subsequently facilitate the study of HF growth and biology.
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Affiliation(s)
- Yan Li
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Miaohan Jin
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Yawei Gao
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Lijin Lu
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Jing Cao
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, CAS Key Laboratory of Primate Neurobiology, State Key Laboratory of Neuroscience, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yao Liu
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Yulin Chen
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Livestock Biology, Northwest A&F University, Yangling 712100, China
| | - Xiaolong Wang
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Livestock Biology, Northwest A&F University, Yangling 712100, China
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11
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An SY, Kim HS, Kim SY, Van SY, Kim HJ, Lee JH, Han SW, Kwon IK, Lee CK, Do SH, Hwang YS. Keratin-mediated hair growth and its underlying biological mechanism. Commun Biol 2022; 5:1270. [PMID: 36402892 PMCID: PMC9675858 DOI: 10.1038/s42003-022-04232-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 11/08/2022] [Indexed: 11/21/2022] Open
Abstract
Here we show that intradermal injection of keratin promotes hair growth in mice, which results from extracellular interaction of keratin with hair forming cells. Extracellular application of keratin induces condensation of dermal papilla cells and the generation of a P-cadherin-expressing cell population (hair germ) from outer root sheath cells via keratin-mediated microenvironmental changes. Exogenous keratin-mediated hair growth is reflected by the finding that keratin exposure from transforming growth factor beta 2 (TGFβ2)-induced apoptotic outer root sheath cells appears to be critical for dermal papilla cell condensation and P-cadherin-expressing hair germ formation. Immunodepletion or downregulation of keratin released from or expressed in TGFβ2-induced apoptotic outer root sheath cells negatively influences dermal papilla cell condensation and hair germ formation. Our pilot study provides an evidence on initiating hair regeneration and insight into the biological function of keratin exposed from apoptotic epithelial cells in tissue regeneration and development.
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Affiliation(s)
- Seong Yeong An
- grid.289247.20000 0001 2171 7818Department of Maxillofacial Biomedical Engineering, College of Dentistry, Kyung Hee University, Seoul, 02447 Republic of Korea
| | - Hyo-Sung Kim
- grid.258676.80000 0004 0532 8339Department of Veterinary Clinical Pathology, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029 Republic of Korea
| | - So Yeon Kim
- grid.289247.20000 0001 2171 7818Department of Maxillofacial Biomedical Engineering, College of Dentistry, Kyung Hee University, Seoul, 02447 Republic of Korea ,grid.411311.70000 0004 0532 4733Present Address: Department of Dental Hygiene, College of Health Science, Cheongju University, Cheongju, 360-764 Republic of Korea
| | - Se Young Van
- grid.289247.20000 0001 2171 7818Department of Maxillofacial Biomedical Engineering, College of Dentistry, Kyung Hee University, Seoul, 02447 Republic of Korea
| | - Han Jun Kim
- grid.258676.80000 0004 0532 8339Department of Veterinary Clinical Pathology, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029 Republic of Korea ,grid.419901.4Present Address: Terasaki Institute for Biomedical Innovation, Los Angeles, CA 90064 USA
| | - Jae-Hyung Lee
- grid.289247.20000 0001 2171 7818Department of Oral Microbiology, College of Dentistry, Kyung Hee University, Seoul, 02447 Republic of Korea
| | - Song Wook Han
- KeraMedix Inc, # 204, Open Innovation Bld, Hongryeung Bio-Cluster, 117-3 Hoegi-ro, Dongdaemun-gu, Seoul, 02455 Republic of Korea
| | - Il Keun Kwon
- grid.289247.20000 0001 2171 7818Department of Dental Materials, College of Dentistry, Kyung Hee University, Seoul, 02447 Republic of Korea
| | - Chul-Kyu Lee
- Headquarters of New Drug Development Support, Chemon Inc. 15 F, Gyeonggi Bio Center, Cheongju, Gyeonggi-do 16229 Republic of Korea
| | - Sun Hee Do
- grid.258676.80000 0004 0532 8339Department of Veterinary Clinical Pathology, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029 Republic of Korea
| | - Yu-Shik Hwang
- grid.289247.20000 0001 2171 7818Department of Maxillofacial Biomedical Engineering, College of Dentistry, Kyung Hee University, Seoul, 02447 Republic of Korea
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12
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Valet M, Narbonne P. Formation of benign tumors by stem cell deregulation. PLoS Genet 2022; 18:e1010434. [PMID: 36301803 PMCID: PMC9612571 DOI: 10.1371/journal.pgen.1010434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Within living organisms, stem cells respond to various cues, including to niche signals and growth factors. Niche signals originate from the stem cell's microenvironment and promote the undifferentiated state by preventing differentiation, allowing for stem cell self-renewal. On the other hand, growth factors promote stem cell growth and proliferation, while their sources comprise of a systemic input reflecting the animal's nutritional and metabolic status, and a localized, homeostatic feedback signal from the tissue that the stem cells serve. That homeostatic signal prevents unnecessary stem cell proliferation when the corresponding differentiated tissues already have optimal cell contents. Here, we recapitulate progresses made in our understanding of in vivo stem cell regulation, largely using simple models, and draw the conclusion that 2 types of stem cell deregulations can provoke the formation of benign tumors. Namely, constitutive niche signaling promotes the formation of undifferentiated "stem cell" tumors, while defective homeostatic signaling leads to the formation of differentiated tumors. Finally, we provide evidence that these general principles may be conserved in mammals and as such, may underlie benign tumor formation in humans, while benign tumors can evolve into cancer.
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Affiliation(s)
- Matthieu Valet
- Département de biologie médicale, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
| | - Patrick Narbonne
- Département de biologie médicale, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
- * E-mail:
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13
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Kang YH, Hyun JE, Hwang CY. The number of mitochondrial DNA mutations as a genetic feature for hair cycle arrest (alopecia X) in Pomeranian dogs. Vet Dermatol 2022; 33:545-552. [PMID: 36000586 DOI: 10.1111/vde.13114] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 04/24/2022] [Accepted: 05/04/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Hair cycle arrest (HCA) is a noninflammatory alopecic disease affecting various dog breeds, particularly Pomeranian dogs. This disease is probably a hereditary disorder considering the strong breed predisposition. Despite efforts to identify the pathogenesis of this disease, an underlying specific cause is unknown. OBJECTIVE To identify candidate gene mutations for HCA in Pomeranian dogs. ANIMALS Four Pomeranian dogs diagnosed with HCA and four unaffected Pomeranian dogs. MATERIALS AND METHODS Whole blood was used for DNA extraction. Whole-genome sequencing (WGS) was performed, and variants were analysed using a Genome Analysis Toolkit (GATK) and SnpEff. All reads were aligned to the reference genome, Dog10K_Boxer_Tasha. Sanger sequencing was performed to define the complex mutations. RESULTS A total of 113 variants of mitochondrial DNA were found to be effective gene mutations in the eight dogs. The affected dogs showed significantly increased effective mutations (average 57 variants) compared with unaffected dogs (average eight variants; p < 0.05). There was no significant difference in the number of chromosomal DNA mutations between the two groups. CONCLUSION AND CLINICAL IMPORTANCE We suggest that an increased number of mitochondrial gene mutations are features for HCA in Pomeranian dogs.
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Affiliation(s)
- Yeong-Hun Kang
- Laboratory of Veterinary Dermatology and the Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Jae-Eun Hyun
- Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Korea
| | - Cheol-Yong Hwang
- Laboratory of Veterinary Dermatology and the Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
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14
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Liu Y, Yang S, Zeng Y, Tang Z, Zong X, Li X, Yang C, Liu L, Tong X, Zhou L, Wang D. Dysregulated behaviour of hair follicle stem cells triggers alopecia and provides potential therapeutic targets. Exp Dermatol 2022; 31:986-992. [PMID: 35524394 DOI: 10.1111/exd.14600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 04/10/2022] [Accepted: 05/03/2022] [Indexed: 11/26/2022]
Abstract
Due to a steady increase in the number of individuals suffering from alopecia, this condition has recently received increasing attention. Alopecia can be caused by various pathological, environmental or psychological factors, eventually resulting in abnormalities in hair follicle (HF) structures or HF regeneration disorders, especially dysregulated hair follicle stem cell (HFSC) behaviour. HFSC behaviour includes activation, proliferation and differentiation. Appropriate HFSC behaviour sustains a persistent hair cycle (HC). HFSC behaviour is mainly influenced by HFSC metabolism, ageing, and the microenvironment. In this review, we summarize recent findings on how HFSC metabolism, ageing and the microenvironment give rise to hair growth disorders, as well as related genes and signalling pathways. Recent research on the application of stem cell-based hair tissue engineering and regenerative medicine to treat alopecia is also summarized. Determining how dysregulated HFSC behaviour underlies alopecia would be helpful in identifying potential therapeutic targets.
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Affiliation(s)
- Yuanhong Liu
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Shengbo Yang
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yilan Zeng
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Ziting Tang
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiule Zong
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xuemei Li
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Caifeng Yang
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Lulu Liu
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiaoliang Tong
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Lu Zhou
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Dan Wang
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, China
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15
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Direct Reprograming of Mouse Fibroblasts into Dermal Papilla Cells via Small Molecules. Int J Mol Sci 2022; 23:ijms23084213. [PMID: 35457029 PMCID: PMC9030401 DOI: 10.3390/ijms23084213] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 03/29/2022] [Accepted: 04/07/2022] [Indexed: 01/27/2023] Open
Abstract
The reprogramming of somatic fibroblasts into alternative cell linages could provide a promising source of cells for regenerative medicine and cell therapy. However, the direct conversion of fibroblasts into other functional cell types is still challenging. In this study, we show that dermal-papilla-cell-like cells (DPC-LCs) can be generated by treating fibroblasts, including L929 mouse fibroblast cell lines and somatic mouse fibroblasts, with small molecules. Based on alkaline phosphatase activity and other molecular markers, different compounds or their combinations are needed for converting the two different fibroblasts into DPC-LCs. Notably, we found that TTNPB alone can efficiently convert primary adult mouse fibroblasts into DPC-LCs. DPC-LCs generated from mouse fibroblasts showed a stronger hair-inducing capacity. Transcriptome analysis reveals that expression of genes associated with a hair-inducing capacity are increased in DPC-LCs. This pharmacological approach to generating functional dermal papilla cells may have many important implications for hair follicle regeneration and hair loss therapy.
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16
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Genomic and Transcriptomic Characterization of Atypical Recurrent Flank Alopecia in the Cesky Fousek. Genes (Basel) 2022; 13:genes13040650. [PMID: 35456456 PMCID: PMC9033119 DOI: 10.3390/genes13040650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 04/03/2022] [Accepted: 04/05/2022] [Indexed: 11/24/2022] Open
Abstract
Non-inflammatory alopecia is a frequent skin problem in dogs, causing damaged coat integrity and compromised appearance of affected individuals. In this study, we examined the Cesky Fousek breed, which displays atypical recurrent flank alopecia (aRFA) at a high frequency. This type of alopecia can be quite severe and is characterized by seasonal episodes of well demarcated alopecic areas without hyperpigmentation. The genetic component responsible for aRFA remains unknown. Thus, here we aimed to identify variants involved in aRFA using a combination of histological, genomic, and transcriptomic data. We showed that aRFA is histologically similar to recurrent flank alopecia, characterized by a lack of anagen hair follicles and the presence of severely shortened telogen or kenogen hair follicles. We performed a genome-wide association study (GWAS) using 216 dogs phenotyped for aRFA and identified associations on chromosomes 19, 8, 30, 36, and 21, highlighting 144 candidate genes, which suggests a polygenic basis for aRFA. By comparing the skin cell transcription pattern of six aRFA and five control dogs, we identified 236 strongly differentially expressed genes (DEGs). We showed that the GWAS genes associated with aRFA are often predicted to interact with DEGs, suggesting their joint contribution to the development of the disease. Together, these genes affect four major metabolic pathways connected to aRFA: collagen formation, muscle structure/contraction, lipid metabolism, and the immune system.
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17
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Visceral mesoderm signaling regulates assembly position and function of the Drosophila testis niche. Dev Cell 2022; 57:1009-1023.e5. [PMID: 35390292 PMCID: PMC9050945 DOI: 10.1016/j.devcel.2022.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 02/07/2022] [Accepted: 03/14/2022] [Indexed: 12/20/2022]
Abstract
Tissue homeostasis often requires a properly placed niche to support stem cells. Morphogenetic processes that position a niche are just being described. For the Drosophila testis, we recently showed that pro-niche cells, specified at disparate positions during early gonadogenesis, must assemble into one collective at the anterior of the gonad. We now find that Slit and FGF signals emanating from adjacent visceral mesoderm regulate assembly. In response to signaling, niche cells express islet, which we find is also required for niche assembly. Without signaling, niche cells specified furthest from the anterior are unable to migrate, remaining dispersed. The function of such niches is severely disrupted, with niche cells evading cell cycle quiescence, compromised in their ability to signal the incipient stem cell pool, and failing to orient stem cell divisions properly. Our work identifies both extrinsic signaling and intrinsic responses required for proper assembly and placement of the testis niche.
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18
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Anudeep TC, Jeyaraman M, Muthu S, Rajendran RL, Gangadaran P, Mishra PC, Sharma S, Jha SK, Ahn BC. Advancing Regenerative Cellular Therapies in Non-Scarring Alopecia. Pharmaceutics 2022; 14:pharmaceutics14030612. [PMID: 35335987 PMCID: PMC8953616 DOI: 10.3390/pharmaceutics14030612] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/28/2022] [Accepted: 03/07/2022] [Indexed: 02/05/2023] Open
Abstract
Alopecia or baldness is a common diagnosis in clinical practice. Alopecia can be scarring or non-scarring, diffuse or patchy. The most prevalent type of alopecia is non-scarring alopecia, with the majority of cases being androgenetic alopecia (AGA) or alopecia areata (AA). AGA is traditionally treated with minoxidil and finasteride, while AA is treated with immune modulators; however, both treatments have significant downsides. These drawbacks compel us to explore regenerative therapies that are relatively devoid of adverse effects. A thorough literature review was conducted to explore the existing proven and experimental regenerative treatment modalities in non-scarring alopecia. Multiple treatment options compelled us to classify them into growth factor-rich and stem cell-rich. The growth factor-rich group included platelet-rich plasma, stem cell-conditioned medium, exosomes and placental extract whereas adult stem cells (adipose-derived stem cell-nano fat and stromal vascular fraction; bone marrow stem cell and hair follicle stem cells) and perinatal stem cells (umbilical cord blood-derived mesenchymal stem cells (hUCB-MSCs), Wharton jelly-derived MSCs (WJ-MSCs), amniotic fluid-derived MSCs (AF-MSCs), and placental MSCs) were grouped into the stem cell-rich group. Because of its regenerative and proliferative capabilities, MSC lies at the heart of regenerative cellular treatment for hair restoration. A literature review revealed that both adult and perinatal MSCs are successful as a mesotherapy for hair regrowth. However, there is a lack of standardization in terms of preparation, dose, and route of administration. To better understand the source and mode of action of regenerative cellular therapies in hair restoration, we have proposed the "À La Mode Classification". In addition, available evidence-based cellular treatments for hair regrowth have been thoroughly described.
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Affiliation(s)
- Talagavadi Channaiah Anudeep
- Department of Plastic Surgery, Topiwala National Medical College and BYL Nair Ch. Hospital, Mumbai 400008, India;
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida 201310, India; (M.J.); (S.M.); (S.K.J.)
- À La Mode Esthétique Studio, Mysuru 570011, India
- International Association of Stem Cell and Regenerative Medicine (IASRM), New Delhi 110092, India; (P.C.M.); (S.S.)
| | - Madhan Jeyaraman
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida 201310, India; (M.J.); (S.M.); (S.K.J.)
- International Association of Stem Cell and Regenerative Medicine (IASRM), New Delhi 110092, India; (P.C.M.); (S.S.)
- Department of Orthopaedics, Faculty of Medicine—Sri Lalithambigai Medical College and Hospital, Dr MGR Educational and Research Institute, Chennai 600095, India
| | - Sathish Muthu
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida 201310, India; (M.J.); (S.M.); (S.K.J.)
- International Association of Stem Cell and Regenerative Medicine (IASRM), New Delhi 110092, India; (P.C.M.); (S.S.)
- Department of Orthopaedics, Government Medical College and Hospital, Dindigul 624304, India
| | - Ramya Lakshmi Rajendran
- Department of Nuclear Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Korea;
| | - Prakash Gangadaran
- Department of Nuclear Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Korea;
- BK21 FOUR KNU Convergence Educational Program of Biomedical Sciences for Creative Future Talents, Department of Biomedical Sciences, School of Medicine, Kyungpook National University, Daegu 41944, Korea
- Correspondence: (P.G.); (B.-C.A.)
| | - Prabhu Chandra Mishra
- International Association of Stem Cell and Regenerative Medicine (IASRM), New Delhi 110092, India; (P.C.M.); (S.S.)
| | - Shilpa Sharma
- International Association of Stem Cell and Regenerative Medicine (IASRM), New Delhi 110092, India; (P.C.M.); (S.S.)
- Department of Paediatric Surgery, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Saurabh Kumar Jha
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida 201310, India; (M.J.); (S.M.); (S.K.J.)
- International Association of Stem Cell and Regenerative Medicine (IASRM), New Delhi 110092, India; (P.C.M.); (S.S.)
| | - Byeong-Cheol Ahn
- Department of Nuclear Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Korea;
- BK21 FOUR KNU Convergence Educational Program of Biomedical Sciences for Creative Future Talents, Department of Biomedical Sciences, School of Medicine, Kyungpook National University, Daegu 41944, Korea
- Correspondence: (P.G.); (B.-C.A.)
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19
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Wang S, Wu T, Sun J, Li Y, Yuan Z, Sun W. Single-Cell Transcriptomics Reveals the Molecular Anatomy of Sheep Hair Follicle Heterogeneity and Wool Curvature. Front Cell Dev Biol 2022; 9:800157. [PMID: 34993204 PMCID: PMC8724054 DOI: 10.3389/fcell.2021.800157] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 11/26/2021] [Indexed: 12/19/2022] Open
Abstract
Wool is the critical textile raw material which is produced by the hair follicle of sheep. Therefore, it has important implications to investigate the molecular mechanism governing hair follicle development. Due to high cellular heterogeneity as well as the insufficient cellular, molecular, and spatial characterization of hair follicles on sheep, the molecular mechanisms involved in hair follicle development and wool curvature of sheep remains largely unknown. Single-cell RNA sequencing (scRNA-seq) technologies have made it possible to comprehensively dissect the cellular composition of complex skin tissues and unveil the differentiation and spatial signatures of epidermal and hair follicle development. However, such studies are lacking so far in sheep. Here, single-cell suspensions from the curly wool and straight wool lambskins were prepared for unbiased scRNA-seq. Based on UAMP dimension reduction analysis, we identified 19 distinct cell populations from 15,830 single-cell transcriptomes and characterized their cellular identity according to specific gene expression profiles. Furthermore, novel marker gene was applied in identifying dermal papilla cells isolated in vitro. By using pseudotime ordering analysis, we constructed the matrix cell lineage differentiation trajectory and revealed the dynamic gene expression profiles of matrix progenitors' commitment to the hair shaft and inner root sheath (IRS) cells. Meanwhile, intercellular communication between mesenchymal and epithelial cells was inferred based on CellChat and the prior knowledge of ligand–receptor pairs. As a result, strong intercellular communication and associated signaling pathways were revealed. Besides, to clarify the molecular mechanism of wool curvature, differentially expressed genes in specific cells between straight wool and curly wool were identified and analyzed. Our findings here provided an unbiased and systematic view of the molecular anatomy of sheep hair follicle comprising 19 clusters; revealed the differentiation, spatial signatures, and intercellular communication underlying sheep hair follicle development; and at the same time revealed the potential molecular mechanism of wool curvature, which will give important new insights into the biology of the sheep hair follicle and has implications for sheep breeding.
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Affiliation(s)
- Shanhe Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Tianyi Wu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Jingyi Sun
- College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Yue Li
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Zehu Yuan
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Wei Sun
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
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20
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Polycomb repressive complex 2 in adult hair follicle stem cells is dispensable for hair regeneration. PLoS Genet 2021; 17:e1009948. [PMID: 34905545 PMCID: PMC8670713 DOI: 10.1371/journal.pgen.1009948] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/15/2021] [Indexed: 12/17/2022] Open
Abstract
Hair follicle stem cells (HFSCs) are multipotent cells that cycle through quiescence and activation to continuously fuel the production of hair follicles. Prior genome mapping studies had shown that tri-methylation of histone H3 at lysine 27 (H3K27me3), the chromatin mark mediated by Polycomb Repressive Complex 2 (PRC2), is dynamic between quiescent and activated HFSCs, suggesting that transcriptional changes associated with H3K27me3 might be critical for proper HFSC function. However, functional in vivo studies elucidating the role of PRC2 in adult HFSCs are lacking. In this study, by using in vivo loss-of-function studies we show that, surprisingly, PRC2 plays a non-instructive role in adult HFSCs and loss of PRC2 in HFSCs does not lead to loss of HFSC quiescence or changes in cell identity. Interestingly, RNA-seq and immunofluorescence analyses of PRC2-null quiescent HFSCs revealed upregulation of genes associated with activated state of HFSCs. Altogether, our findings show that transcriptional program under PRC2 regulation is dispensable for maintaining HFSC quiescence and hair regeneration.
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21
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Wang Y, Sui Y, Lian A, Han X, Liu F, Zuo K, Liu M, Sun W, Wang Z, Liu Z, Zou F, Lu R, Jin M, Du H, Xu K, Liu X, Liu J. PBX1 Attenuates Hair Follicle-Derived Mesenchymal Stem Cell Senescence and Apoptosis by Alleviating Reactive Oxygen Species-Mediated DNA Damage Instead of Enhancing DNA Damage Repair. Front Cell Dev Biol 2021; 9:739868. [PMID: 34869323 PMCID: PMC8634257 DOI: 10.3389/fcell.2021.739868] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 10/25/2021] [Indexed: 12/11/2022] Open
Abstract
Tissues and organs undergo structural deterioration and functional decline during aging. DNA damage is considered a major cause of stem cell senescence. Although stem cells develop sophisticated DNA repair systems, when the intrinsic and extrinsic insults exceed the DNA repair capacity, cellular senescence, and age-related diseases inevitably occur. Therefore, the prevention and alleviation of DNA damage is an alternative to DNA repair in attenuating stem cell senescence and preventing age-related diseases. Pre-B-cell leukaemia homeobox 1 (PBX1) participates in maintaining the pluripotency of human embryonic and haematopoietic stem cells. Our recent studies showed that PBX1 promotes hair follicle-derived mesenchymal stem cell (HF-MSC) proliferation, decreases cellular senescence and apoptosis, and enhances induced pluripotent stem cell generation. Whether PBX1 attenuates HF-MSC senescence and apoptosis by alleviating DNA damage or by enhancing DNA repair remains unknown. In this study, we aimed to determine the effects of PBX1 on the intrinsic ROS or extrinsic H2O2-induced cellular senescence of HF-MSCs. To this end, we generated HF-MSCs overexpressing either PBX1, or poly (ADP-ribose) polymerase 1, or both. Our results showed that PBX1 overexpression attenuates HF-MSC senescence and apoptosis by alleviating reactive oxygen species (ROS)-mediated DNA damage instead of enhancing DNA repair. This is the first study to report that PBX1 attenuates stem cell senescence and apoptosis by alleviating DNA damage. It provides new insight into the mechanism of stem cell senescence and lays the foundation for the development of strategies for age-related disease prevention and treatment, and in particular, hair follicle repair and regeneration.
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Affiliation(s)
- Yuan Wang
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Yutong Sui
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Aobo Lian
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Xing Han
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Feilin Liu
- Eye Center, The Second Hospital of Jilin University, Changchun, China.,Department of Neuroscience, Mayo Clinic, Jacksonville, FL, United States
| | - Kuiyang Zuo
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Mingsheng Liu
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Wei Sun
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Ziyu Wang
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Zinan Liu
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Fei Zou
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Rifeng Lu
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Minghua Jin
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Haiying Du
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Kan Xu
- Department of Neurovascular Surgery, First Hospital of Jilin University, Changchun, China
| | - Xiaomei Liu
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
| | - Jinyu Liu
- Department of Toxicology, School of Public Health, Jilin University, Changchun, China
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22
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Yang M, Weng T, Zhang W, Zhang M, He X, Han C, Wang X. The Roles of Non-coding RNA in the Development and Regeneration of Hair Follicles: Current Status and Further Perspectives. Front Cell Dev Biol 2021; 9:720879. [PMID: 34708037 PMCID: PMC8542792 DOI: 10.3389/fcell.2021.720879] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 09/23/2021] [Indexed: 12/12/2022] Open
Abstract
Alopecia is a common problem that affects almost every age group and is considered to be an issue for cosmetic or psychiatric reasons. The loss of hair follicles (HFs) and hair caused by alopecia impairs self-esteem, thermoregulation, tactile sensation and protection from ultraviolet light. One strategy to solve this problem is HF regeneration. Many signalling pathways and molecules participate in the morphology and regeneration of HF, such as Wnt/β-catenin, Sonic hedgehog, bone morphogenetic protein and Notch. Non-coding RNAs (ncRNAs), especially microRNAs and long ncRNAs, have significant modulatory roles in HF development and regeneration via regulation of these signalling pathways. This review provides a comprehensive overview of the status and future prospects of ncRNAs in HF regeneration and could prompt novel ncRNA-based therapeutic strategies.
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Affiliation(s)
- Min Yang
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, Hangzhou, China.,Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, Hangzhou, China
| | - Tingting Weng
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, Hangzhou, China.,Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, Hangzhou, China
| | - Wei Zhang
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, Hangzhou, China.,Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, Hangzhou, China
| | - Manjia Zhang
- The First Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xiaojie He
- Department of General Practice, Second Affiliated Hospital of Zhejiang University, Hangzhou, China
| | - Chunmao Han
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, Hangzhou, China.,Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, Hangzhou, China
| | - Xingang Wang
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, Hangzhou, China.,Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, Hangzhou, China
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23
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Flora P, Dalal G, Cohen I, Ezhkova E. Polycomb Repressive Complex(es) and Their Role in Adult Stem Cells. Genes (Basel) 2021; 12:1485. [PMID: 34680880 PMCID: PMC8535826 DOI: 10.3390/genes12101485] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/13/2021] [Accepted: 09/22/2021] [Indexed: 12/31/2022] Open
Abstract
Populations of resident stem cells (SCs) are responsible for maintaining, repairing, and regenerating adult tissues. In addition to having the capacity to generate all the differentiated cell types of the tissue, adult SCs undergo long periods of quiescence within the niche to maintain themselves. The process of SC renewal and differentiation is tightly regulated for proper tissue regeneration throughout an organisms' lifetime. Epigenetic regulators, such as the polycomb group (PcG) of proteins have been implicated in modulating gene expression in adult SCs to maintain homeostatic and regenerative balances in adult tissues. In this review, we summarize the recent findings that elucidate the composition and function of the polycomb repressive complex machinery and highlight their role in diverse adult stem cell compartments.
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Affiliation(s)
- Pooja Flora
- Department of Cell, Developmental, and Regenerative Biology, Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, New York, NY 10029, USA;
| | - Gil Dalal
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel;
| | - Idan Cohen
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel;
| | - Elena Ezhkova
- Department of Cell, Developmental, and Regenerative Biology, Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, New York, NY 10029, USA;
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24
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Latta L, Figueiredo FC, Ashery-Padan R, Collinson JM, Daniels J, Ferrari S, Szentmáry N, Solá S, Shalom-Feuerstein R, Lako M, Xapelli S, Aberdam D, Lagali N. Pathophysiology of aniridia-associated keratopathy: Developmental aspects and unanswered questions. Ocul Surf 2021; 22:245-266. [PMID: 34520870 DOI: 10.1016/j.jtos.2021.09.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 07/19/2021] [Accepted: 09/08/2021] [Indexed: 12/13/2022]
Abstract
Aniridia, a rare congenital disease, is often characterized by a progressive, pronounced limbal insufficiency and ocular surface pathology termed aniridia-associated keratopathy (AAK). Due to the characteristics of AAK and its bilateral nature, clinical management is challenging and complicated by the multiple coexisting ocular and systemic morbidities in aniridia. Although it is primarily assumed that AAK originates from a congenital limbal stem cell deficiency, in recent years AAK and its pathogenesis has been questioned in the light of new evidence and a refined understanding of ocular development and the biology of limbal stem cells (LSCs) and their niche. Here, by consolidating and comparing the latest clinical and preclinical evidence, we discuss key unanswered questions regarding ocular developmental aspects crucial to AAK. We also highlight hypotheses on the potential role of LSCs and the ocular surface microenvironment in AAK. The insights thus gained lead to a greater appreciation for the role of developmental and cellular processes in the emergence of AAK. They also highlight areas for future research to enable a deeper understanding of aniridia, and thereby the potential to develop new treatments for this rare but blinding ocular surface disease.
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Affiliation(s)
- L Latta
- Dr. Rolf. M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg, Saar, Germany; Department of Ophthalmology, Saarland University Medical Center, Homburg, Saar, Germany.
| | - F C Figueiredo
- Department of Ophthalmology, Royal Victoria Infirmary, Newcastle Upon Tyne, United Kingdom
| | - R Ashery-Padan
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, 69978, Israel
| | - J M Collinson
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Institute of Medical Sciences, Foresterhill, Aberdeen, AB25 2ZD, United Kingdom
| | - J Daniels
- Cells for Sight, UCL Institute of Ophthalmology, University College London, London, EC1V 9EL, UK
| | - S Ferrari
- The Veneto Eye Bank Foundation, Venice, Italy
| | - N Szentmáry
- Dr. Rolf. M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg, Saar, Germany
| | - S Solá
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - R Shalom-Feuerstein
- Department of Genetics and Developmental Biology, The Rappaport Faculty of Medicine and Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
| | - M Lako
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne, UK
| | - S Xapelli
- Instituto Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal; Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - D Aberdam
- Centre de Recherche des Cordeliers, INSERM U1138, Team 17, France; Université de Paris, 75006, Paris, France.
| | - N Lagali
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden; Department of Ophthalmology, Sørlandet Hospital Arendal, Arendal, Norway.
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25
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Zhang J, Chen R, Wen L, Fan Z, Guo Y, Hu Z, Miao Y. Recent Progress in the Understanding of the Effect of Sympathetic Nerves on Hair Follicle Growth. Front Cell Dev Biol 2021; 9:736738. [PMID: 34513851 PMCID: PMC8427189 DOI: 10.3389/fcell.2021.736738] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 08/02/2021] [Indexed: 11/15/2022] Open
Abstract
Clinical observation and experimental studies have long suggested that the perifollicular nerves have nutritional and regulatory effects on the growth, development, and physiological cycle of hair follicles (HFs), even though the concrete mechanism remains obscure. Recently, with the progress of immunohistochemistry and molecular biology techniques, more innovation has been made in the study of the follicular sympathetic nerves and its nerve-effect factor norepinephrine affecting hair follicle stem cells. This review highlights the progress in the regulation of the sympathetic nervous system toward the growth of HFs.
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Affiliation(s)
- Jiarui Zhang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Ruosi Chen
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Lihong Wen
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Zhexiang Fan
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yilong Guo
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Zhiqi Hu
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yong Miao
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
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26
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Huang S, Kuri P, Aubert Y, Brewster M, Li N, Farrelly O, Rice G, Bae H, Prouty S, Dentchev T, Luo W, Capell BC, Rompolas P. Lgr6 marks epidermal stem cells with a nerve-dependent role in wound re-epithelialization. Cell Stem Cell 2021; 28:1582-1596.e6. [PMID: 34102139 PMCID: PMC8528178 DOI: 10.1016/j.stem.2021.05.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 03/04/2021] [Accepted: 05/13/2021] [Indexed: 02/06/2023]
Abstract
Stem cells support lifelong maintenance of adult organs, but their specific roles during injury are poorly understood. Here we demonstrate that Lgr6 marks a regionally restricted population of epidermal stem cells that interact with nerves and specialize in wound re-epithelialization. Diphtheria toxin-mediated ablation of Lgr6 stem cells delays wound healing, and skin denervation phenocopies this effect. Using intravital imaging to capture stem cell dynamics after injury, we show that wound re-epithelialization by Lgr6 stem cells is diminished following loss of nerves. This induces recruitment of other stem cell populations, including hair follicle stem cells, which partially compensate to mediate wound closure. Single-cell lineage tracing and gene expression analysis reveal that the fate of Lgr6 stem cells is shifted toward differentiation following loss of their niche. We conclude that Lgr6 epidermal stem cells are primed for injury response and interact with nerves to regulate their fate.
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Affiliation(s)
- Sixia Huang
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Paola Kuri
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Yann Aubert
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Megan Brewster
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ning Li
- Department of Biomedical Sciences, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Olivia Farrelly
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Gabriella Rice
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Hyunjin Bae
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Stephen Prouty
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Tzvete Dentchev
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Wenqin Luo
- Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Institute for Regenerative Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Brian C Capell
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Institute for Regenerative Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Panteleimon Rompolas
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Institute for Regenerative Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
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27
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Hu XM, Li ZX, Zhang DY, Yang YC, Fu SA, Zhang ZQ, Yang RH, Xiong K. A systematic summary of survival and death signalling during the life of hair follicle stem cells. Stem Cell Res Ther 2021; 12:453. [PMID: 34380571 PMCID: PMC8359037 DOI: 10.1186/s13287-021-02527-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 07/26/2021] [Indexed: 12/13/2022] Open
Abstract
Hair follicle stem cells (HFSCs) are among the most widely available resources and most frequently approved model systems used for studying adult stem cells. HFSCs are particularly useful because of their self-renewal and differentiation properties. Additionally, the cyclic growth of hair follicles is driven by HFSCs. There are high expectations for the use of HFSCs as favourable systems for studying the molecular mechanisms that contribute to HFSC identification and can be applied to hair loss therapy, such as the activation or regeneration of hair follicles, and to the generation of hair using a tissue-engineering strategy. A variety of molecules are involved in the networks that critically regulate the fate of HFSCs, such as factors in hair follicle growth and development (in the Wnt pathway, Sonic hedgehog pathway, Notch pathway, and BMP pathway), and that suppress apoptotic cues (the apoptosis pathway). Here, we review the life cycle, biomarkers and functions of HFSCs, concluding with a summary of the signalling pathways involved in HFSC fate for promoting better understanding of the pathophysiological changes in the HFSC niche. Importantly, we highlight the potential mechanisms underlying the therapeutic targets involved in pathways associated with the treatment of hair loss and other disorders of skin and hair, including alopecia, skin cancer, skin inflammation, and skin wound healing.
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Affiliation(s)
- Xi-Min Hu
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Morphological Sciences Building, 172 Tongzi Po Road, Changsha, 410013, China.,Department of Dermatology, Xiangya Hospital, Central South University, Changsha, 410013, China
| | - Zhi-Xin Li
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Morphological Sciences Building, 172 Tongzi Po Road, Changsha, 410013, China
| | - Dan-Yi Zhang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Morphological Sciences Building, 172 Tongzi Po Road, Changsha, 410013, China
| | - Yi-Chao Yang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Morphological Sciences Building, 172 Tongzi Po Road, Changsha, 410013, China
| | - Shen-Ao Fu
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Morphological Sciences Building, 172 Tongzi Po Road, Changsha, 410013, China
| | - Zai-Qiu Zhang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Morphological Sciences Building, 172 Tongzi Po Road, Changsha, 410013, China
| | - Rong-Hua Yang
- Department of Burn Surgery, The First People's Hospital of Foshan, #81, Lingnan North Road, Foshan, 528000, China.
| | - Kun Xiong
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Central South University, Morphological Sciences Building, 172 Tongzi Po Road, Changsha, 410013, China. .,Hunan Key Laboratory of Ophthalmology, Changsha, 410008, China.
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28
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Geueke A, Mantellato G, Kuester F, Schettina P, Nelles M, Seeger JM, Kashkar H, Niemann C. The anti-apoptotic Bcl-2 protein regulates hair follicle stem cell function. EMBO Rep 2021; 22:e52301. [PMID: 34342114 PMCID: PMC8490995 DOI: 10.15252/embr.202052301] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 07/08/2021] [Accepted: 07/13/2021] [Indexed: 11/15/2022] Open
Abstract
Maintaining the architecture, size and composition of an intact stem cell (SC) compartment is crucial for tissue homeostasis and regeneration throughout life. In mammalian skin, elevated expression of the anti‐apoptotic Bcl‐2 protein has been reported in hair follicle (HF) bulge SCs (BSCs), but its impact on SC function is unknown. Here, we show that systemic exposure of mice to the Bcl‐2 antagonist ABT‐199/venetoclax leads to the selective loss of suprabasal BSCs (sbBSCs), thereby disrupting cyclic HF regeneration. RNAseq analysis shows that the pro‐apoptotic BH3‐only proteins BIM and Bmf are upregulated in sbBSCs, explaining their addiction to Bcl‐2 and the marked susceptibility to Bcl‐2 antagonism. In line with these observations, conditional knockout of Bcl‐2 in mouse epidermis elevates apoptosis in BSCs. In contrast, ectopic Bcl‐2 expression blocks apoptosis during HF regression, resulting in the accumulation of quiescent SCs and delaying HF growth in mice. Strikingly, Bcl‐2‐induced changes in size and composition of the HF bulge accelerate tumour formation. Our study identifies a niche‐instructive mechanism of Bcl‐2‐regulated apoptosis response that is required for SC homeostasis and tissue regeneration, and may suppress carcinogenesis.
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Affiliation(s)
- Anna Geueke
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Centre of Biochemistry, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Giada Mantellato
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Centre of Biochemistry, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Florian Kuester
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Peter Schettina
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Melanie Nelles
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Jens Michael Seeger
- Institute for Medical Microbiology, Immunology and Hygiene (IMMIH), CECAD Research Center, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Hamid Kashkar
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Institute for Medical Microbiology, Immunology and Hygiene (IMMIH), CECAD Research Center, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Catherin Niemann
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Centre of Biochemistry, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
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29
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Morinaga H, Mohri Y, Grachtchouk M, Asakawa K, Matsumura H, Oshima M, Takayama N, Kato T, Nishimori Y, Sorimachi Y, Takubo K, Suganami T, Iwama A, Iwakura Y, Dlugosz AA, Nishimura EK. Obesity accelerates hair thinning by stem cell-centric converging mechanisms. Nature 2021; 595:266-271. [PMID: 34163066 PMCID: PMC9600322 DOI: 10.1038/s41586-021-03624-x] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 05/07/2021] [Indexed: 02/06/2023]
Abstract
Obesity is a worldwide epidemic that predisposes individuals to many age-associated diseases, but its exact effects on organ dysfunction are largely unknown1. Hair follicles-mini-epithelial organs that grow hair-are miniaturized by ageing to cause hair loss through the depletion of hair follicle stem cells (HFSCs)2. Here we report that obesity-induced stress, such as that induced by a high-fat diet (HFD), targets HFSCs to accelerate hair thinning. Chronological gene expression analysis revealed that HFD feeding for four consecutive days in young mice directed activated HFSCs towards epidermal keratinization by generating excess reactive oxygen species, but did not reduce the pool of HFSCs. Integrative analysis using stem cell fate tracing, epigenetics and reverse genetics showed that further feeding with an HFD subsequently induced lipid droplets and NF-κB activation within HFSCs via autocrine and/or paracrine IL-1R signalling. These integrated factors converge on the marked inhibition of Sonic hedgehog (SHH) signal transduction in HFSCs, thereby further depleting lipid-laden HFSCs through their aberrant differentiation and inducing hair follicle miniaturization and eventual hair loss. Conversely, transgenic or pharmacological activation of SHH rescued HFD-induced hair loss. These data collectively demonstrate that stem cell inflammatory signals induced by obesity robustly represses organ regeneration signals to accelerate the miniaturization of mini-organs, and suggests the importance of daily prevention of organ dysfunction.
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Affiliation(s)
- Hironobu Morinaga
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Yasuaki Mohri
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Marina Grachtchouk
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Kyosuke Asakawa
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Hiroyuki Matsumura
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Motohiko Oshima
- Division of Stem Cell and Molecular Medicine, Center for Stem Cell Biology and Regenerative Medicine, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Naoya Takayama
- Department of Regenerative Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Tomoki Kato
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Yuriko Nishimori
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Yuriko Sorimachi
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan
| | - Keiyo Takubo
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan
| | - Takayoshi Suganami
- Department of Molecular Medicine and Metabolism, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Atsushi Iwama
- Division of Stem Cell and Molecular Medicine, Center for Stem Cell Biology and Regenerative Medicine, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Yoichiro Iwakura
- Centre for Animal Disease Models, Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - Andrzej A. Dlugosz
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Emi K. Nishimura
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.,Division of Aging and Regeneration, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan.,Correspondence and requests for materials should be addressed to Emi K. Nishimura.
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30
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Gupta AK, Renaud HJ, Rapaport JA. Platelet-rich Plasma and Cell Therapy: The New Horizon in Hair Loss Treatment. Dermatol Clin 2021; 39:429-445. [PMID: 34053596 DOI: 10.1016/j.det.2021.04.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Current medicinal therapies for treating hair loss have shortcomes due to variability and ineffectiveness, noncompliance, and adverse effects. The prevalence of hair loss and its associated negative psychological impact have driven research into regenerative medicine approaches, such as platelet-rich plasma (PRP) and cell-based therapies, in an attempt to find alternative, safe, effective, and reproducible treatments. Current research shows promising results from these therapies; however, more robust trials are needed to confirm the reported efficacies of PRP and cell-based therapies. Moreover, standardization of treatment preparation as well as dose and regimen are needed.
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Affiliation(s)
- Aditya K Gupta
- Division of Dermatology, Department of Medicine, University of Toronto School of Medicine, Toronto, Ontario, Canada; Mediprobe Research Inc., 645 Windermere Road, London, Ontario N5X 2P1, Canada.
| | - Helen J Renaud
- Mediprobe Research Inc., 645 Windermere Road, London, Ontario N5X 2P1, Canada
| | - Jeffrey A Rapaport
- Cosmetic Skin and Surgery Center, 333 Sylvan Avenue, Suite 207, Englewood Cliffs, NJ 07632, USA
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31
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Ji S, Yang Z, Gozali L, Kenney T, Kocabas A, Jinsook Park C, Hynes M. Distinct expression of select and transcriptome-wide isolated 3'UTRs suggests critical roles in development and transition states. PLoS One 2021; 16:e0250669. [PMID: 33951080 PMCID: PMC8099112 DOI: 10.1371/journal.pone.0250669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 04/08/2021] [Indexed: 01/06/2023] Open
Abstract
Mature mRNA molecules are expected to be comprised of a 5'UTR, a 3'UTR and a coding region (CDS). Unexpectedly, however, there have been multiple recent reports of widespread differential expression of mRNA 3'UTRs and their cognate coding regions (CDS), reflecting the expression of isolated 3'UTRs (i3'UTRs); these i3'UTRs can be highly expressed, often in reciprocal patterns to their cognate CDS. As with other long non-coding (lncRNAs), isolated 3'UTRs are likely to play an important role in gene regulation, but little is known about the contexts in which they are deployed. To illuminate the functions of i3'UTRs, here we carry out in vitro, in vivo and in silico analyses of differential 3'UTR/CDS mRNA ratio usage across tissues, development and cell state changes both for a select list of developmentally important genes as well as by unbiased transcriptome-wide analyses. Across two developmental paradigms we find a distinct switch from high i3'UTR expression for stem cell related genes in proliferating cells to high CDS for these genes in newly differentiated cells. Unbiased transcriptome analysis across multiple gene sets shows that regardless of tissue, genes with high 3'UTR to CDS ratios belong predominantly to gene ontology categories related to cell-type specific functions. In contrast, the gene ontology categories of genes with low 3'UTR to CDS ratios are similar across tissues and relate to common cellular functions. We further show that, at least for some genes, traditional transcriptional start site genomic elements correspond to identified RNAseq 3'UTR peak regions, suggesting that some i3'UTRs may be generated by de novo transcription. Our results provide critical information from which detailed hypotheses for individual i3'UTRs can be tested, with a common theme that i3'UTRs appear poised to regulate cell-specific gene expression and state.
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Affiliation(s)
- Shaoyi Ji
- Dept. of Biology, Stanford University, Stanford, CA, United States of America
| | - Ze Yang
- Dept. of Biology, Stanford University, Stanford, CA, United States of America
| | - Leonardi Gozali
- Dept. of Biology, Stanford University, Stanford, CA, United States of America
| | - Thomas Kenney
- Dept. of Biology, Stanford University, Stanford, CA, United States of America
| | - Arif Kocabas
- Rockefeller University, New York, NY, United States of America
| | | | - Mary Hynes
- Dept. of Biology, Stanford University, Stanford, CA, United States of America
- Rockefeller University, New York, NY, United States of America
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32
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Yamashita T, Kushida Y, Abe K, Dezawa M. Non-Tumorigenic Pluripotent Reparative Muse Cells Provide a New Therapeutic Approach for Neurologic Diseases. Cells 2021; 10:cells10040961. [PMID: 33924240 PMCID: PMC8074773 DOI: 10.3390/cells10040961] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/15/2021] [Accepted: 04/17/2021] [Indexed: 02/06/2023] Open
Abstract
Muse cells are non-tumorigenic endogenous reparative pluripotent cells with high therapeutic potential. They are identified as cells positive for the pluripotent surface marker SSEA-3 in the bone marrow, peripheral blood, and connective tissue. Muse cells also express other pluripotent stem cell markers, are able to differentiate into cells representative of all three germ layers, self-renew from a single cell, and are stress tolerant. They express receptors for sphingosine-1-phosphate (S1P), which is actively produced by damaged cells, allowing circulating cells to selectively home to damaged tissue. Muse cells spontaneously differentiate on-site into multiple tissue-constituent cells with few errors and replace damaged/apoptotic cells with functional cells, thereby contributing to tissue repair. Intravenous injection of exogenous Muse cells to increase the number of circulating Muse cells enhances their reparative activity. Muse cells also have a specific immunomodulatory system, represented by HLA-G expression, allowing them to be directly administered without HLA-matching or immunosuppressant treatment. Owing to these unique characteristics, clinical trials using intravenously administered donor-Muse cells have been conducted for myocardial infarction, stroke, epidermolysis bullosa, spinal cord injury, perinatal hypoxic ischemic encephalopathy, and amyotrophic lateral sclerosis. Muse cells have the potential to break through the limitations of current cell therapies for neurologic diseases, including amyotrophic lateral sclerosis. Muse cells provide a new therapeutic strategy that requires no HLA-matching or immunosuppressant treatment for administering donor-derived cells, no gene introduction or differentiation induction for cell preparation, and no surgery for delivering the cells to patients.
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Affiliation(s)
- Toru Yamashita
- Department of Neurology, School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan; (T.Y.); (K.A.)
| | - Yoshihiro Kushida
- Department of Stem Cell Biology and Histology, School of Medicine, Tohoku University, Sendai 980-8575, Japan;
| | - Koji Abe
- Department of Neurology, School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan; (T.Y.); (K.A.)
| | - Mari Dezawa
- Department of Stem Cell Biology and Histology, School of Medicine, Tohoku University, Sendai 980-8575, Japan;
- Correspondence: ; Tel.: +81-22-717-8025; Fax: +81-22-717-8030
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33
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Abstract
Significance: Hair follicles are complex miniorgans that reside in the dermal layer of the skin. When the skin is wounded, epidermal stem cells in the hair follicle activate and start migrating into the wound site, differentiating into epidermal cells. and contributing to the reepithelialization of the wound. The hair follicles represent the deepest epidermal elements in the skin, which are extremely beneficial in partial-thickness burns and abrasions where the skin can regenerate from the hair follicles. Recent Advances: Advanced animal models have demonstrated that the contribution of epidermal stem cells in the hair follicle bulge and isthmus regions is important for wound healing. In addition, several clinical studies have shown successful harvesting and transplantation of hair follicles as a treatment modality to accelerate wound healing. Critical Issues: Deep and large wounds require hospitalization and, without exception, surgical treatment. Harvesting and direct transplantation of hair follicles could provide a great source of autologous epidermal stem cells for wound healing. The procedure can be done in an outpatient setting, quickly and without creating a large donor site wound. Future Directions: Transplantation of hair follicles in a combination with novel biomaterials could provide advantageous treatment possibilities for both chronic wounds and burns. There is a substantial amount of molecular signaling data available on the role of hair follicles during wound repair, but almost all the data are derived from rodent models, and thus, more information from large animals and most importantly from humans would be beneficial and help to advance this promising treatment further.
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Affiliation(s)
- Kristo Nuutila
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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Contessi Negrini N, Angelova Volponi A, Higgins C, Sharpe P, Celiz A. Scaffold-based developmental tissue engineering strategies for ectodermal organ regeneration. Mater Today Bio 2021; 10:100107. [PMID: 33889838 PMCID: PMC8050778 DOI: 10.1016/j.mtbio.2021.100107] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 02/15/2021] [Accepted: 02/27/2021] [Indexed: 12/12/2022] Open
Abstract
Tissue engineering (TE) is a multidisciplinary research field aiming at the regeneration, restoration, or replacement of damaged tissues and organs. Classical TE approaches combine scaffolds, cells and soluble factors to fabricate constructs mimicking the native tissue to be regenerated. However, to date, limited success in clinical translations has been achieved by classical TE approaches, because of the lack of satisfactory biomorphological and biofunctional features of the obtained constructs. Developmental TE has emerged as a novel TE paradigm to obtain tissues and organs with correct biomorphology and biofunctionality by mimicking the morphogenetic processes leading to the tissue/organ generation in the embryo. Ectodermal appendages, for instance, develop in vivo by sequential interactions between epithelium and mesenchyme, in a process known as secondary induction. A fine artificial replication of these complex interactions can potentially lead to the fabrication of the tissues/organs to be regenerated. Successful developmental TE applications have been reported, in vitro and in vivo, for ectodermal appendages such as teeth, hair follicles and glands. Developmental TE strategies require an accurate selection of cell sources, scaffolds and cell culture configurations to allow for the correct replication of the in vivo morphogenetic cues. Herein, we describe and discuss the emergence of this TE paradigm by reviewing the achievements obtained so far in developmental TE 3D scaffolds for teeth, hair follicles, and salivary and lacrimal glands, with particular focus on the selection of biomaterials and cell culture configurations.
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Affiliation(s)
| | - A. Angelova Volponi
- Centre for Craniofacial and Regenerative Biology, King's College London, London, UK
| | - C.A. Higgins
- Department of Bioengineering, Imperial College London, London, UK
| | - P.T. Sharpe
- Centre for Craniofacial and Regenerative Biology, King's College London, London, UK
| | - A.D. Celiz
- Department of Bioengineering, Imperial College London, London, UK
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Zhang P, Ishikawa M, Doyle A, Nakamura T, He B, Yamada Y. Pannexin 3 regulates skin development via Epiprofin. Sci Rep 2021; 11:1779. [PMID: 33469169 PMCID: PMC7815752 DOI: 10.1038/s41598-021-81074-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 12/28/2020] [Indexed: 12/11/2022] Open
Abstract
Pannexin 3 (Panx3), a member of the gap junction pannexin family is required for the development of hard tissues including bone, cartilage and teeth. However, the role of Panx3 in skin development remains unclear. Here, we demonstrate that Panx3 regulates skin development by modulating the transcription factor, Epiprofin (Epfn). Panx3-/- mice have impaired skin development and delayed hair follicle regeneration. Loss of Panx3 in knockout mice and suppression by shRNA both elicited a reduction of Epfn expression in the epidermis. In cell culture, Panx3 overexpression promoted HaCaT cell differentiation, cell cycle exit and enhanced Epfn expression. Epfn-/- mice and inhibition of Epfn by siRNA showed no obvious differences of Panx3 expression. Furthermore, Panx3 promotes Akt/NFAT signaling pathway in keratinocyte differentiation by both Panx3 ATP releasing channel and ER Ca2+ channel functions. Our results reveal that Panx3 has a key role factor for the skin development by regulating Epfn.
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Affiliation(s)
- Peipei Zhang
- Molecular Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Masaki Ishikawa
- Division of Operative Dentistry, Department of Restorative Dentistry, Tohoku University, Graduate School of Dentistry 4-1, Seiryo chou, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
| | - Andrew Doyle
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Takashi Nakamura
- Division of Molecular Pharmacology and Cell Biophysics, Department of Oral Biology, Tohoku University Graduate School of Dentistry, Sendai, 980-8575, Japan
| | - Bing He
- Protein Section, Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Yoshihiko Yamada
- Molecular Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, 20892, USA
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Lee SA, Li KN, Tumbar T. Stem cell-intrinsic mechanisms regulating adult hair follicle homeostasis. Exp Dermatol 2020; 30:430-447. [PMID: 33278851 DOI: 10.1111/exd.14251] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/23/2020] [Accepted: 11/24/2020] [Indexed: 12/12/2022]
Abstract
Adult hair follicle stem cells (HFSCs) undergo dynamic and periodic molecular changes in their cellular states throughout the hair homeostatic cycle. These states are tightly regulated by cell-intrinsic mechanisms and by extrinsic signals from the microenvironment. HFSCs are essential not only for fuelling hair growth, but also for skin wound healing. Increasing evidence suggests an important role of HFSCs in organizing multiple skin components around the hair follicle, thus functioning as an organizing centre during adult skin homeostasis. Here, we focus on recent findings on cell-intrinsic mechanisms of HFSC homeostasis, which include transcription factors, histone modifications, DNA regulatory elements, non-coding RNAs, cell metabolism, cell polarity and post-transcriptional mRNA processing. Several transcription factors are now known to participate in well-known signalling pathways that control hair follicle homeostasis, as well as in super-enhancer activities to modulate HFSC and progenitor lineage progression. Interestingly, HFSCs have been shown to secrete molecules that are important in guiding the organization of several skin components around the hair follicle, including nerves, arrector pili muscle and vasculature. Finally, we discuss recent technological advances in the field such as single-cell RNA sequencing and live imaging, which revealed HFSC and progenitor heterogeneity and brought new light to understanding crosstalking between HFSCs and the microenvironment. The field is well on its way to generate a comprehensive map of molecular interactions that should serve as a solid theoretical platform for application in hair and skin disease and ageing.
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Affiliation(s)
- Seon A Lee
- Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA
| | - Kefei Nina Li
- Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA
| | - Tudorita Tumbar
- Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA
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Yoshida S. Mouse Spermatogenesis Reflects the Unity and Diversity of Tissue Stem Cell Niche Systems. Cold Spring Harb Perspect Biol 2020; 12:cshperspect.a036186. [PMID: 32152184 DOI: 10.1101/cshperspect.a036186] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Mouse spermatogenesis is supported by spermatogenic stem cells (SSCs). SSCs maintain their pool while migrating over an open (or facultative) niche microenvironment of testicular seminiferous tubules, where ligands that support self-renewal are likely distributed widely. This contrasts with the classic picture of closed (or definitive) niches in which stem cells are gathered and the ligands are highly localized. Some of the key properties observed in the dynamics of SSCs in the testicular niche in vivo, which show the flexible and stochastic (probabilistic) fate behaviors, are found to be generic for a wide range of, if not all, tissue stem cells. SSCs also show properties characteristic of an open niche-supported system, such as high motility. Motivated by the properties of SSCs, in this review, I will reconsider the potential unity and diversity of tissue stem cell systems, with an emphasis on the varying degrees of ligand distribution and stem cell motility.
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Affiliation(s)
- Shosei Yoshida
- Division of Germ Cell Biology, National Institute for Basic Biology, National Institutes of Natural Sciences; and Department of Basic Biology, School of Life Science, SOKENDAI (Graduate University for Advanced Studies), Okazaki, Aichi 444-8787, Japan
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The microfollicle: a model of the human hair follicle for in vitro studies. In Vitro Cell Dev Biol Anim 2020; 56:847-858. [PMID: 33170472 DOI: 10.1007/s11626-020-00513-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 09/17/2020] [Indexed: 02/06/2023]
Abstract
Access to complex in vitro models that recapitulate the unique markers and cell-cell interactions of the hair follicle is rather limited. Creation of scalable, affordable, and relevant in vitro systems which can provide predictive screens of cosmetic ingredients and therapeutic actives for hair health would be highly valued. In this study, we explore the features of the microfollicle, a human hair follicle organoid model based on the spatio-temporally defined co-culture of primary cells. The microfollicle provides a 3D differentiation platform for outer root sheath keratinocytes, dermal papilla fibroblasts, and melanocytes, via epidermal-mesenchymal-neuroectodermal cross-talk. For assay applications, microfollicle cultures were adapted to 96-well plates suitable for medium-throughput testing up to 21 days, and characterized for their spatial and lineage markers. The microfollicles showed hair-specific keratin expression in both early and late stages of cultivation. The gene expression profile of microfollicles was also compared with human clinical biopsy samples in response to the benchmark hair-growth compound, minoxidil. The gene expression changes in microfollicles showed up to 75% overlap with the corresponding gene expression signature observed in the clinical study. Based on our results, the cultivation of the microfollicle appears to be a practical tool for generating testable insights for hair follicle development and offers a complex model for pre-clinical substance testing.
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Morgun EI, Vorotelyak EA. Epidermal Stem Cells in Hair Follicle Cycling and Skin Regeneration: A View From the Perspective of Inflammation. Front Cell Dev Biol 2020; 8:581697. [PMID: 33240882 PMCID: PMC7680886 DOI: 10.3389/fcell.2020.581697] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 10/20/2020] [Indexed: 12/17/2022] Open
Abstract
There are many studies devoted to the role of hair follicle stem cells in wound healing as well as in follicle self-restoration. At the same time, the influence of the inflammatory cells on the hair follicle cycling in both injured and intact skin is well established. Immune cells of all wound healing stages, including macrophages, γδT cells, and T regs, may activate epidermal stem cells to provide re-epithelization and wound-induced hair follicle neogenesis. In addition to the ability of epidermal cells to maintain epidermal morphogenesis through differentiation program, they can undergo de-differentiation and acquire stem features under the influence of inflammatory milieu. Simultaneously, a stem cell compartment may undergo re-programming to adopt another fate. The proportion of skin resident immune cells and wound-attracted inflammatory cells (e.g., neutrophils and macrophages) in wound-induced hair follicle anagen and plucking-induced anagen is still under discussion to date. Experimental data suggesting the role of reactive oxygen species and prostaglandins, which are uncharacteristic of the intact skin, in the hair follicle cycling indicates the role of neutrophils in injury-induced conditions. In this review, we discuss some of the hair follicles stem cell activities, such as wound-induced hair follicle neogenesis, hair follicle cycling, and re-epithelization, through the prism of inflammation. The plasticity of epidermal stem cells under the influence of inflammatory microenvironment is considered. The relationship between inflammation, scarring, and follicle neogenesis as an indicator of complete wound healing is also highlighted. Taking into consideration the available data, we also conclude that there may exist a presumptive interlink between the stem cell activation, inflammation and the components of programmed cell death pathways.
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Affiliation(s)
- Elena I. Morgun
- Laboratory of Cell Biology, Koltzov Institute of Developmental Biology of Russian Academy of Sciences, Moscow, Russia
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Abstract
Stress has long been associated with hair graying, yet there is little evidence to substantiate this claim. In a recent issue of Nature, Zhang et al. (2020) show that stress induces the release of noradrenaline from sympathetic nerves, which depletes the stem cells that give hair their color.
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Zaki AKA, Almundarij TI, Abo-Aziza FAM. Comparative characterization and osteogenic / adipogenic differentiation of mesenchymal stem cells derived from male rat hair follicles and bone marrow. CELL REGENERATION (LONDON, ENGLAND) 2020; 9:13. [PMID: 32778979 PMCID: PMC7417469 DOI: 10.1186/s13619-020-00051-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/06/2020] [Indexed: 01/11/2023]
Abstract
Clinical applications of cell therapy and tissue regeneration under different conditions need a multiplicity of adult stem cell sources. Up to date, little is available on the comparative isolation, characterization, proliferation, rapid amplification, and osteogenic/adipogenic differentiation of rat mesenchymal stem cells (MSCs) isolated from living bulge cells of the hair follicle (HF) and bone marrow (BM) from the same animal. This work hopes to use HF-MSCs as an additional adult stem cell source for research and application. After reaching 80% confluence, the cell counting, viability %, and yields of HF-MSCs and BM-MSCs were nearly similar. The viability % was 91.41 ± 2.98 and 93.11 ± 3.06 while the cells yield of initial seeding was 33.15 ± 2.76 and 34.22 ± 3.99 and of second passage was 28.76 ± 1.01 and 29.56 ± 3.11 for HF-MSCs and BM-MSCs respectively. Clusters of differentiation (CDs) analysis revealed that HF-MSCs were positively expressed CD34, CD73 and CD200 and negatively expressed CD45. BM-MSCs were positively expressed CD73 and CD200 and negatively expressed of CD34 and CD45. The proliferation of HF-MSCs and BM-MSCs was determined by means of incorporation of Brd-U, population doubling time (PDT) assays and the quantity of formazan release. The percentage of Brd-U positive cells and PDT were relatively similar in both types of cells. The proliferation, as expressed by the quantity of formazan assay in confluent cells, revealed that the quantity of release by BM-MSCs was slightly higher than HF-MSCs. Adipogenic differentiated BM-MSCs showed moderate accumulation of oil red-O stained lipid droplets when compared to that of HF-MSCs which exhibited high stain. The total lipid concentration was significantly higher in adipogenic differentiated HF-MSCs than BM-MSCs (P < 0.05). It was found that activity of bone alkaline phosphatase and calcium concentration were significantly higher (P < 0.01 and P < 0.05 respectively) in osteogenic differentiated BM-MSCs than that of HF-MSCs. The present findings demonstrate that the HF-MSCs are very similar in most tested characteristics to BM-MSCs with the exception of differentiation. Additionally; no issues have been reported during the collection of HF-MSCs. Therefore, the HF may represent a suitable and accessible source for adult stem cells and can be considered an ideal cell source for adipogenesis research.
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Affiliation(s)
- Abdel Kader A Zaki
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah, Saudi Arabia.
- Department of Physiology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt.
| | - Tariq I Almundarij
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah, Saudi Arabia
| | - Faten A M Abo-Aziza
- Department of Parasitology and Animal Diseases, Veterinary Research Division, National Research Centre, Cairo, Egypt
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Transcriptome Profiling and Differential Gene Expression in Canine Microdissected Anagen and Telogen Hair Follicles and Interfollicular Epidermis. Genes (Basel) 2020; 11:genes11080884. [PMID: 32759649 PMCID: PMC7463739 DOI: 10.3390/genes11080884] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/31/2020] [Accepted: 08/03/2020] [Indexed: 11/17/2022] Open
Abstract
The transcriptome profile and differential gene expression in telogen and late anagen microdissected hair follicles and the interfollicular epidermis of healthy dogs was investigated by using RNAseq. The genes with the highest expression levels in each group were identified and genes known from studies in other species to be associated with structure and function of hair follicles and epidermis were evaluated. Transcriptome profiling revealed that late anagen follicles expressed mainly keratins and telogen follicles expressed GSN and KRT15. The interfollicular epidermis expressed predominately genes encoding for proteins associated with differentiation. All sample groups express genes encoding for proteins involved in cellular growth and signal transduction. The expression pattern of skin-associated genes in dogs is similar to humans. Differences in expression compared to mice and humans include BMP2 expression mainly in telogen and high KRT17 expression in the interfollicular epidermis of dogs. Our data provide the basis for the investigation of the structure and function of canine skin or skin disease and support the use of dogs as a model for human cutaneous disease by assigning gene expression to specific tissue states.
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Ramovs V, Krotenberg Garcia A, Song JY, de Rink I, Kreft M, Goldschmeding R, Sonnenberg A. Integrin α3β1 in hair bulge stem cells modulates CCN2 expression and promotes skin tumorigenesis. Life Sci Alliance 2020; 3:3/7/e202000645. [PMID: 32423907 PMCID: PMC7240742 DOI: 10.26508/lsa.202000645] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 05/06/2020] [Accepted: 05/06/2020] [Indexed: 12/18/2022] Open
Abstract
Although hair bulge stem cells are not the cancer cells-of-origin, they contribute to two-stage DMBA/TPA skin carcinogenesis in an α3β1-dependent manner. Epidermal-specific deletion of integrin α3β1 almost completely prevents the formation of papillomas during 7,12-Dimethylbenz[a]anthracene/12-O-tetradecanoylphorbol-13-acetate (DMBA/TPA) two-stage skin carcinogenesis. This dramatic decrease in tumorigenesis was thought to be due to an egress and premature differentiation of α3β1-depleted hair bulge (HB) stem cells (SCs), previously considered to be the cancer cells-of-origin in the DMBA/TPA model. Using a reporter mouse line with inducible deletion of α3β1 in HBs, we show that HB SCs remain confined to their niche regardless of the presence of α3β1 and are largely absent from skin tumors. However, tumor formation was significantly decreased in mice deficient for α3β1 in HB SCs. RNA sequencing of HB SCs isolated from short-term DMBA/TPA–treated skin showed α3β1-dependent expression of the matricellular protein connective tissue growth factor (CCN2), which was confirmed in vitro, where CCN2 promoted colony formation and 3D growth of transformed keratinocytes. Together, these findings show that HBs contribute to skin tumorigenesis in an α3β1-dependent manner and suggest a role of HB SCs in creating a permissive environment for tumor growth through the modulation of CCN2 secretion.
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Affiliation(s)
- Veronika Ramovs
- Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Ana Krotenberg Garcia
- Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Ji-Ying Song
- Department of Experimental Animal Pathology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Iris de Rink
- Genomics Core Facility, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Maaike Kreft
- Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Roel Goldschmeding
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Arnoud Sonnenberg
- Division of Cell Biology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
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Moon H, White AC, Borowsky AD. New insights into the functions of Cox-2 in skin and esophageal malignancies. Exp Mol Med 2020; 52:538-547. [PMID: 32235869 PMCID: PMC7210257 DOI: 10.1038/s12276-020-0412-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 02/28/2020] [Indexed: 02/08/2023] Open
Abstract
Understanding the cellular and molecular mechanisms of tumor initiation and progression for each cancer type is central to making improvements in both prevention and therapy. Identifying the cancer cells of origin and the necessary and sufficient mechanisms of transformation and progression provide opportunities for improved specific clinical interventions. In the last few decades, advanced genetic manipulation techniques have facilitated rapid progress in defining the etiologies of cancers and their cells of origin. Recent studies driven by various groups have provided experimental evidence indicating the cellular origins for each type of skin and esophageal cancer and have identified underlying mechanisms that stem/progenitor cells use to initiate tumor development. Specifically, cyclooxygenase-2 (Cox-2) is associated with tumor initiation and progression in many cancer types. Recent studies provide data demonstrating the roles of Cox-2 in skin and esophageal malignancies, especially in squamous cell carcinomas (SCCs) occurring in both sites. Here, we review experimental evidence aiming to define the origins of skin and esophageal cancers and discuss how Cox-2 contributes to tumorigenesis and differentiation.
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Affiliation(s)
- Hyeongsun Moon
- Center for Immunology and Infectious Diseases, University of California, Davis, CA, 95616, USA.
| | - Andrew C White
- Department of Biological Sciences, Cornell University, Ithaca, NY, 14850, USA
| | - Alexander D Borowsky
- Center for Immunology and Infectious Diseases, University of California, Davis, CA, 95616, USA
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Semsarzadeh N, Khetarpal S. Platelet-Rich Plasma and Stem Cells for Hair Growth: A Review of the Literature. Aesthet Surg J 2020; 40:NP177-NP188. [PMID: 31111157 DOI: 10.1093/asj/sjz146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The prevalence of hair loss, its psychological consequences, and historically subpar treatments present a unique challenge to the physician. The current Food and Drug Administration-approved treatments for hair loss are plagued by ineffectiveness, noncompliance, and adverse effects. Recent advances in our understanding of hair physiology have fueled the development of more efficacious, minimally invasive, and safer treatment options for hair restoration including plasma-rich protein and stem cell therapy. Platelet-rich plasma, the autologous preparation of concentrated platelets in plasma, when injected into the scalp of patients with both androgenetic alopecia (AGA) and alopecia areata (AA), has been shown to increase hair count and density. The clinical findings have been supported by histologic evaluation of the scalp skin. These findings have been recapitulated in numerous randomized controlled trials. Stem cell therapy, although newer in its application in hair restoration, has also been effective for treating both AGA and AA. The isolation techniques for stem cells are varied, but regardless have shown promising results in early prospective and retrospective studies.
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Affiliation(s)
- Nina Semsarzadeh
- Department of Dermatology, Cleveland Clinic Foundation, Cleveland, OH
| | - Shilpi Khetarpal
- Department of Dermatology, Cleveland Clinic Foundation, Cleveland, OH
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Houschyar KS, Borrelli MR, Tapking C, Popp D, Puladi B, Ooms M, Chelliah MP, Rein S, Pförringer D, Thor D, Reumuth G, Wallner C, Branski LK, Siemers F, Grieb G, Lehnhardt M, Yazdi AS, Maan ZN, Duscher D. Molecular Mechanisms of Hair Growth and Regeneration: Current Understanding and Novel Paradigms. Dermatology 2020; 236:271-280. [PMID: 32163945 DOI: 10.1159/000506155] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 01/27/2020] [Indexed: 11/19/2022] Open
Abstract
Hair is a defining feature of mammals and has critical functions, including protection, production of sebum, apocrine sweat and pheromones, social and sexual interactions, thermoregulation, and provision of stem cells for skin homeostasis, regeneration, and repair. The hair follicle (HF) is considered a "mini-organ," consisting of intricate and well-organized structures which originate from HF stem and progenitor cells. Dermal papilla cells are the main components of the mesenchymal compartments in the hair bulb and are instrumental in generating signals to regulate the behavior of neighboring epithelial cells during the hair cycle. Mesenchymal-epithelial interactions within the dermal papilla niche drive HF embryonic development as well as the postnatal hair growth and regeneration cycle. This review summarizes the current understanding of HF development, repair, and regeneration, with special focus on cell signaling pathways governing these processes. In particular, we discuss emerging paradigms of molecular signaling governing the dermal papilla-epithelial cellular interactions during hair growth and maintenance and the recent progress made towards tissue engineering of human hair follicles.
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Affiliation(s)
- Khosrow Siamak Houschyar
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | - Mimi R Borrelli
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, California, USA
| | - Christian Tapking
- Department of Surgery, Shriners Hospitals for Children-Galveston, University of Texas Medical Branch, Galveston, Texas, USA.,Department of Hand, Plastic and Reconstructive Surgery, Burn Trauma Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Heidelberg, Germany
| | - Daniel Popp
- Department of Surgery, Shriners Hospitals for Children-Galveston, University of Texas Medical Branch, Galveston, Texas, USA.,Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Behrus Puladi
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH, Aachen, Germany
| | - Mark Ooms
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH, Aachen, Germany
| | - Malcolm P Chelliah
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, California, USA
| | - Susanne Rein
- Department of Plastic and Hand Surgery, Burn Center, Clinic St. Georg, Leipzig, Germany
| | - Dominik Pförringer
- Clinic and Policlinic of Trauma Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Dominik Thor
- College of Pharmacy, University of Florida Gainesville, Gainesville, Florida, USA
| | - Georg Reumuth
- Department of Plastic and Hand Surgery, Burn Unit, Trauma Center Bergmannstrost Halle, Halle, Germany
| | - Christoph Wallner
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | - Ludwik K Branski
- Department of Surgery, Shriners Hospitals for Children-Galveston, University of Texas Medical Branch, Galveston, Texas, USA
| | - Frank Siemers
- Department of Plastic and Hand Surgery, Burn Unit, Trauma Center Bergmannstrost Halle, Halle, Germany
| | - Gerrit Grieb
- Department of Plastic Surgery and Hand Surgery, Gemeinschaftskrankenhaus Havelhoehe, Teaching Hospital of the Charité Berlin, Berlin, Germany
| | - Marcus Lehnhardt
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | - Amir S Yazdi
- Department of Dermatology and Allergology, University Hospital Aachen, Aachen, Germany
| | - Zeshaan N Maan
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, California, USA
| | - Dominik Duscher
- Department of Plastic Surgery and Hand Surgery, Technical University Munich, Munich, Germany,
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Wang ECE, Higgins CA. Immune cell regulation of the hair cycle. Exp Dermatol 2020; 29:322-333. [PMID: 31903650 DOI: 10.1111/exd.14070] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/14/2019] [Accepted: 12/31/2019] [Indexed: 12/11/2022]
Abstract
The ability to manipulate the mammalian hair cycle will lead to novel therapies and strategies to combat all forms of alopecia. Thus, in addition to the epithelial-mesenchymal interactions in the hair follicle, niche and microenvironmental signals that accompany the phases of growth, regression and rest need to be scrutinized. Immune cells are well described in skin homeostasis and wound healing and have recently been shown to play an important role in the mammalian hair cycle. In this review, we will summarize our current knowledge of the role of immune cells in hair cycle control and discuss their relevance to human hair cycling disorders. Increased attention to this aspect of the hair cycle will provide new avenues to manipulate hair regeneration in humans and provide better insight into developing better ex vivo models of hair growth.
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Affiliation(s)
- Etienne C E Wang
- Skin Research Institute of Singapore (SRIS), National Skin Centre, Singapore, Singapore
| | - Claire A Higgins
- Department of Bioengineering, Imperial College London, London, UK
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Guan Y, Wang G, Fails D, Nagarajan P, Ge Y. Unraveling cancer lineage drivers in squamous cell carcinomas. Pharmacol Ther 2020; 206:107448. [PMID: 31836455 PMCID: PMC6995404 DOI: 10.1016/j.pharmthera.2019.107448] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 12/03/2019] [Indexed: 12/12/2022]
Abstract
Cancer hijacks embryonic development and adult wound repair mechanisms to fuel malignancy. Cancer frequently originates from de-regulated adult stem cells or progenitors, which are otherwise essential units for postnatal tissue remodeling and repair. Cancer genomics studies have revealed convergence of multiple cancers across organ sites, including squamous cell carcinomas (SCCs), a common group of cancers arising from the head and neck, esophagus, lung, cervix and skin. In this review, we summarize our current knowledge on the molecular drivers of SCCs, including these five major organ sites. We especially focus our discussion on lineage dependent driver genes and pathways, in the context of squamous development and stratification. We then use skin as a model to discuss the notion of field cancerization during SCC carcinogenesis, and cancer as a wound that never heals. Finally, we turn to the idea of context dependency widely observed in cancer driver genes, and outline literature support and possible explanations for their lineage specific functions. Through these discussions, we aim to provide an up-to-date summary of molecular mechanisms driving tumor plasticity in squamous cancers. Such basic knowledge will be helpful to inform the clinics for better stratifying cancer patients, revealing novel drug targets and providing effective treatment options.
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Affiliation(s)
- Yinglu Guan
- Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA
| | - Guan Wang
- Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA
| | - Danielle Fails
- Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA
| | - Priyadharsini Nagarajan
- Department of Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA
| | - Yejing Ge
- Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77054, USA.
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Deniz AAH, Abdik EA, Abdik H, Aydın S, Şahin F, Taşlı PN. Zooming in across the Skin: A Macro-to-Molecular Panorama. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1247:157-200. [DOI: 10.1007/5584_2019_442] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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50
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Castro AR, Logarinho E. Tissue engineering strategies for human hair follicle regeneration: How far from a hairy goal? Stem Cells Transl Med 2019; 9:342-350. [PMID: 31876379 PMCID: PMC7031632 DOI: 10.1002/sctm.19-0301] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 11/25/2019] [Indexed: 12/12/2022] Open
Abstract
The demand for an efficient therapy for alopecia disease has fueled the hair research field in recent decades. However, despite significant improvements in the knowledge of key processes of hair follicle biology such as genesis and cycling, translation into hair follicle replacement therapies has not occurred. Great expectation has been recently put on hair follicle bioengineering, which is based on the development of fully functional hair follicles with cycling activity from an expanded population of hair‐inductive (trichogenic) cells. Most bioengineering approaches focus on in vitro reconstruction of folliculogenesis by manipulating key regulatory molecular/physical features of hair follicle growth/cycling in vivo. Despite their great potential, no cell‐based product is clinically available for hair regeneration therapy to date. This is mainly due to demanding issues that still hinder the functionality of cultured human hair cells. The present review comprehensively compares emergent strategies using different cell sources and tissue engineering approaches, aiming to successfully achieve a clinical cure for hair loss. The hurdles of these strategies are discussed, as well as the future directions to overcome the obstacles and fulfill the promise of a “hairy” feat.
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Affiliation(s)
- Ana Rita Castro
- Aging and Aneuploidy Group, IBMC, Instituto de Biologia Molecular e Celular, Porto, Portugal.,i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Programa Doutoral em Engenharia Biomédica, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal.,Saúde Viável - Clínica de Microtransplante Capilar, Porto, Portugal
| | - Elsa Logarinho
- Aging and Aneuploidy Group, IBMC, Instituto de Biologia Molecular e Celular, Porto, Portugal.,i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Saúde Viável - Clínica de Microtransplante Capilar, Porto, Portugal
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