1
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Dermitzakis I, Kampitsi DD, Manthou ME, Evangelidis P, Vakirlis E, Meditskou S, Theotokis P. Ontogeny of Skin Stem Cells and Molecular Underpinnings. Curr Issues Mol Biol 2024; 46:8118-8147. [PMID: 39194698 DOI: 10.3390/cimb46080481] [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: 06/27/2024] [Revised: 07/21/2024] [Accepted: 07/25/2024] [Indexed: 08/29/2024] Open
Abstract
Skin stem cells (SCs) play a pivotal role in supporting tissue homeostasis. Several types of SCs are responsible for maintaining and regenerating skin tissue. These include bulge SCs and others residing in the interfollicular epidermis, infundibulum, isthmus, sebaceous glands, and sweat glands. The emergence of skin SCs commences during embryogenesis, where multipotent SCs arise from various precursor populations. These early events set the foundation for the diverse pool of SCs that will reside in the adult skin, ready to respond to tissue repair and regeneration demands. A network of molecular cues regulates skin SC behavior, balancing quiescence, self-renewal, and differentiation. The disruption of this delicate equilibrium can lead to SC exhaustion, impaired wound healing, and pathological conditions such as skin cancer. The present review explores the intricate mechanisms governing the development, activation, and differentiation of skin SCs, shedding light on the molecular signaling pathways that drive their fate decisions and skin homeostasis. Unraveling the complexities of these molecular drivers not only enhances our fundamental knowledge of skin biology but also holds promise for developing novel strategies to modulate skin SC fate for regenerative medicine applications, ultimately benefiting patients with skin disorders and injuries.
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Affiliation(s)
- Iasonas Dermitzakis
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Despoina Dimitria Kampitsi
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Maria Eleni Manthou
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Paschalis Evangelidis
- Hematology Unit-Hemophilia Centre, 2nd Propedeutic Department of Internal Medicine, Hippocration Hospital, Aristotle University of Thessaloniki, 54642 Thessaloniki, Greece
| | - Efstratios Vakirlis
- First Department of Dermatology and Venereology, School of Medicine, Aristotle University of Thessaloniki, 54643 Thessaloniki, Greece
| | - Soultana Meditskou
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Paschalis Theotokis
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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2
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Ford NC, Benedeck RE, Mattoon MT, Peterson JK, Mesler AL, Veniaminova NA, Gardon DJ, Tsai SY, Uchida Y, Wong SY. Hair follicles modulate skin barrier function. Cell Rep 2024; 43:114347. [PMID: 38941190 PMCID: PMC11317994 DOI: 10.1016/j.celrep.2024.114347] [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: 02/20/2024] [Revised: 04/23/2024] [Accepted: 05/24/2024] [Indexed: 06/30/2024] Open
Abstract
Our skin provides a protective barrier that shields us from our environment. Barrier function is typically associated with the interfollicular epidermis; however, whether hair follicles influence this process remains unclear. Here, we utilize a potent genetic tool to probe barrier function by conditionally ablating a quintessential epidermal barrier gene, Abca12, which is mutated in the most severe skin barrier disease, harlequin ichthyosis. With this tool, we deduced 4 ways by which hair follicles modulate skin barrier function. First, the upper hair follicle (uHF) forms a functioning barrier. Second, barrier disruption in the uHF elicits non-cell-autonomous responses in the epidermis. Third, deleting Abca12 in the uHF impairs desquamation and blocks sebum release. Finally, barrier perturbation causes uHF cells to move into the epidermis. Neutralizing IL-17a, whose expression is enriched in the uHF, partially alleviated some disease phenotypes. Altogether, our findings implicate hair follicles as multi-faceted regulators of skin barrier function.
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Affiliation(s)
- Noah C Ford
- Department of Dermatology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA; Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Rachel E Benedeck
- Department of Dermatology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA; Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Matthew T Mattoon
- Department of Dermatology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jamie K Peterson
- Department of Dermatology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Arlee L Mesler
- Department of Dermatology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Natalia A Veniaminova
- Department of Dermatology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Danielle J Gardon
- Department of Dermatology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Shih-Ying Tsai
- Department of Dermatology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yoshikazu Uchida
- Department of Food Science and Nutrition, and Convergence Program of Material Science for Medicine and Pharmaceutics, Hallym University, Chuncheon, Republic of Korea
| | - Sunny Y Wong
- Department of Dermatology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA.
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Ghuwalewala S, Jiang K, Ragi S, Shalloway D, Tumbar T. A transit-amplifying progenitor with biphasic behavior contributes to epidermal renewal. Development 2024; 151:dev202389. [PMID: 38934416 PMCID: PMC11234368 DOI: 10.1242/dev.202389] [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: 10/02/2023] [Accepted: 05/20/2024] [Indexed: 06/28/2024]
Abstract
Transit-amplifying (TA) cells are progenitors that undergo an amplification phase followed by transition into an extinction phase. A long postulated epidermal TA progenitor with biphasic behavior has not yet been experimentally observed in vivo. Here, we identify such a TA population using clonal analysis of Aspm-CreER genetic cell-marking in mice, which uncovers contribution to both homeostasis and injury repair of adult skin. This TA population is more frequently dividing than a Dlx1-CreER-marked long-term self-renewing (e.g. stem cell) population. Newly developed generalized birth-death modeling of long-term lineage tracing data shows that both TA progenitors and stem cells display neutral competition, but only the stem cells display neutral drift. The quantitative evolution of a nascent TA cell and its direct descendants shows that TA progenitors indeed amplify the basal layer before transition and that the homeostatic TA population is mostly in extinction phase. This model will be broadly useful for analyzing progenitors whose behavior changes with their clone age. This work identifies a long-missing class of non-self-renewing biphasic epidermal TA progenitors and has broad implications for understanding tissue renewal mechanisms.
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Affiliation(s)
- Sangeeta Ghuwalewala
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14850, USA
| | - Kevin Jiang
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14850, USA
| | - Sara Ragi
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14850, USA
| | - David Shalloway
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14850, USA
| | - Tudorita Tumbar
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14850, USA
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4
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Shiokawa D, Sakai H, Koizumi M, Okimoto Y, Mori Y, Kanda Y, Ohata H, Honda H, Okamoto K. Elevated stress response marks deeply quiescent reserve cells of gastric chief cells. Commun Biol 2023; 6:1183. [PMID: 37985874 PMCID: PMC10662433 DOI: 10.1038/s42003-023-05550-2] [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: 02/11/2023] [Accepted: 11/07/2023] [Indexed: 11/22/2023] Open
Abstract
Gastrointestinal tract organs harbor reserve cells, which are endowed with cellular plasticity and regenerate functional units in response to tissue damage. However, whether the reserve cells in gastrointestinal tract exist as long-term quiescent cells remain incompletely understood. In the present study, we systematically examine H2b-GFP label-retaining cells and identify a long-term slow-cycling population in the gastric corpus but not in other gastrointestinal organs. The label-retaining cells, which reside near the basal layers of the corpus, comprise a subpopulation of chief cells. The identified quiescent cells exhibit induction of Atf4 and its target genes including Atf3, a marker of paligenosis, and activation of the unfolded protein response, but do not show elevated expression of Troy, Lgr5, or Mist. External damage to the gastric mucosa induced by indomethacin treatment triggers proliferation of the quiescent Atf4+ population, indicating that the gastric corpus harbors a specific cell population that is primed to facilitate stomach regeneration.
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Affiliation(s)
- Daisuke Shiokawa
- Division of Molecular Pharmacology, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
- Ehime University Hospital Translational Research Center, Shitsukawa, Toon, 791-0295, Ehime, Japan
| | - Hiroaki Sakai
- Advanced Comprehensive Research Organization, Teikyo University, 2-21-1 Kaga, Itabashi-ku, Tokyo, 173-0003, Japan
| | - Miho Koizumi
- Field of Human Disease Models, Major in Advanced Life Sciences and Medicine, Tokyo Women's Medical University, 81- Kawada-cho, Shinjuku-ku, 162-8666, Tokyo, Japan
| | - Yoshie Okimoto
- Advanced Comprehensive Research Organization, Teikyo University, 2-21-1 Kaga, Itabashi-ku, Tokyo, 173-0003, Japan
| | - Yutaro Mori
- Advanced Comprehensive Research Organization, Teikyo University, 2-21-1 Kaga, Itabashi-ku, Tokyo, 173-0003, Japan
| | - Yusuke Kanda
- Advanced Comprehensive Research Organization, Teikyo University, 2-21-1 Kaga, Itabashi-ku, Tokyo, 173-0003, Japan
| | - Hirokazu Ohata
- Advanced Comprehensive Research Organization, Teikyo University, 2-21-1 Kaga, Itabashi-ku, Tokyo, 173-0003, Japan
| | - Hiroaki Honda
- Field of Human Disease Models, Major in Advanced Life Sciences and Medicine, Tokyo Women's Medical University, 81- Kawada-cho, Shinjuku-ku, 162-8666, Tokyo, Japan.
| | - Koji Okamoto
- Advanced Comprehensive Research Organization, Teikyo University, 2-21-1 Kaga, Itabashi-ku, Tokyo, 173-0003, Japan.
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5
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Lim C, Lim J, Choi S. Wound-Induced Hair Follicle Neogenesis as a Promising Approach for Hair Regeneration. Mol Cells 2023; 46:573-578. [PMID: 37650216 PMCID: PMC10590709 DOI: 10.14348/molcells.2023.0071] [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: 07/21/2023] [Accepted: 08/16/2023] [Indexed: 09/01/2023] Open
Abstract
The mammalian skin contains hair follicles, which are epidermal appendages that undergo periodic cycles and exhibit mini-organ features, such as discrete stem cell compartments and different cellular components. Wound-induced hair follicle neogenesis (WIHN) is the remarkable ability to regenerate hair follicles after large-scale wounding and occurs in several adult mammals. WIHN is comparable to embryonic hair follicle development in its processes. Researchers are beginning to identify the stem cells that, in response to wounding, develop into neogenic hair follicles, as well as to understand the functions of immune cells, mesenchymal cells, and several signaling pathways that are essential for this process. WIHN represents a promising therapeutic approach to the reprogramming of cellular states for promoting hair follicle regeneration and preventing scar formation. In the scope of this review, we investigate the contribution of several cell types and molecular mechanisms to WIHN.
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Affiliation(s)
- Chaeryeong Lim
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Jooyoung Lim
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Sekyu Choi
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
- School of Medical Science and Engineering, POSTECH, Pohang 37673, Korea
- School of Interdisciplinary Bioscience and Bioengineering, POSTECH, Pohang 37673, Korea
- Institute for Convergence Research and Education in Advanced Technology (I_CREATE), Yonsei University, Incheon 21983, Korea
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6
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Lorenzo-Martín LF, Bustelo XR. The Rho GTPase exchange factor Vav2 promotes extensive age-dependent rewiring of the hair follicle stem cell transcriptome. Front Cell Dev Biol 2023; 11:1252834. [PMID: 37822868 PMCID: PMC10562702 DOI: 10.3389/fcell.2023.1252834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 09/11/2023] [Indexed: 10/13/2023] Open
Abstract
Both the number and regenerative activity of hair follicle stem cells (HFSCs) are regulated by Vav2, a GDP/GTP exchange factor involved in the catalytic stimulation of the GTPases Rac1 and RhoA. However, whether Vav2 signaling changes in HFSCs over the mouse lifespan is not yet known. Using a mouse knock-in mouse model, we now show that the expression of a catalytically active version of Vav2 (Vav2Onc) promotes an extensive rewiring of the overall transcriptome of HFSCs, the generation of new transcription factor hubs, and the synchronization of many transcriptional programs associated with specific HFSC states and well-defined signaling pathways. Interestingly, this transcriptome rewiring is not fixed in time, as it involves the induction of 15 gene expression waves with diverse distribution patterns during the life of the animals. These expression waves are consistent with the promotion by Vav2Onc of several functional HFSC states that differ from those normally observed in wild-type HFSCs. These results further underscore the role of Vav2 in the regulation of the functional state of HFSCs. They also indicate that, unlike other Vav2-dependent biological processes, the signaling output of this exchange factor is highly contingent on age-dependent intrinsic and/or extrinsic HFSC factors that shape the final biological readouts triggered in this cell type.
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Affiliation(s)
- L. Francisco Lorenzo-Martín
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, Consejo Superior de Investigaciones Científicas (CSIC) and University of Salamanca, Salamanca, Spain
- Instituto de Biología Molecular y Celular del Cáncer, CSIC and University of Salamanca, Salamanca, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Salamanca, Spain
| | - Xosé R. Bustelo
- Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, Consejo Superior de Investigaciones Científicas (CSIC) and University of Salamanca, Salamanca, Spain
- Instituto de Biología Molecular y Celular del Cáncer, CSIC and University of Salamanca, Salamanca, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Salamanca, Spain
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7
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Li KN, Chovatiya G, Ko DY, Sureshbabu S, Tumbar T. Blood endothelial ALK1-BMP4 signaling axis regulates adult hair follicle stem cell activation. EMBO J 2023; 42:e112196. [PMID: 36994549 PMCID: PMC10183823 DOI: 10.15252/embj.2022112196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 02/28/2023] [Accepted: 03/02/2023] [Indexed: 03/31/2023] Open
Abstract
Blood vessels can play dual roles in tissue growth by transporting gases and nutrients and by regulating tissue stem cell activity via signaling. Correlative evidence implicates skin endothelial cells (ECs) as signaling niches of hair follicle stem cells (HFSCs), but functional demonstration from gene depletion of signaling molecules in ECs is missing to date. Here, we show that depletion of the vasculature-factor Alk1 increases BMP4 secretion from ECs, which delays HFSC activation. Furthermore, while previous evidence suggests a lymphatic vessel role in adult HFSC activation possibly through tissue drainage, a blood vessel role has not yet been addressed. Genetic perturbation of the ALK1-BMP4 axis in all ECs or the lymphatic ECs specifically unveils inhibition of HFSC activation by blood vessels. Our work suggests a broader relevance of blood vessels, adding adult HFSCs to the EC functional repertoire as signaling niches for the adult stem cells.
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Affiliation(s)
- Kefei Nina Li
- Department of Molecular Biology and GeneticsCornell UniversityIthacaNYUSA
| | - Gopal Chovatiya
- Department of Molecular Biology and GeneticsCornell UniversityIthacaNYUSA
| | - Daniel Youngjoo Ko
- Department of Molecular Biology and GeneticsCornell UniversityIthacaNYUSA
| | - Sripad Sureshbabu
- Department of Molecular Biology and GeneticsCornell UniversityIthacaNYUSA
| | - Tudorita Tumbar
- Department of Molecular Biology and GeneticsCornell UniversityIthacaNYUSA
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8
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Xiao H, Chen X, Shan J, Liu X, Sun Y, Shen J, Chai Y, We G, Yu Y. A spatiotemporal release hydrogel based on an M1-to-M2 immunoenvironment for wound management. J Mater Chem B 2023; 11:3994-4004. [PMID: 37165902 DOI: 10.1039/d3tb00463e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Cutaneous wounds remain a major clinical challenge that urgently requires the development of advanced and functional wound dressings. During the wound healing process, macrophages are well known to exhibit temporal dynamics with a pro-inflammatory phenotype at early stages and a pro-healing phenotype at late stages, thus playing an important role in regulating inflammatory responses and tissue regeneration. Meanwhile, disrupted temporal dynamics of macrophages caused by poor wound local conditions and deficiency of macrophage function always impair the wound-healing progression. Here in this work, we proposed a novel controllable strategy to construct a spatiotemporal dynamical immune-microenvironment for the treatment of cutaneous wounds. To achieve this goal, a concentric decellularized dermal hydrogel was constructed with the combination of type 1 and type 2 macrophage-associated cytokine complexes in the sheath portion and core portion, respectively. The in vitro degradation experiment exhibited a sequential cascade release of pro-inflammatory cytokines and pro-healing cytokines. The enhanced cell biocompatibility and tube formation of HUVECs were confirmed. A full-thickness skin defect model of rats was developed to analyze the effect of the spatiotemporal dynamical bioactive hydrogels on wound healing. Remarkable angiogenesis, rapid wound restoration, moderate extracellular matrix deposition and obvious skin appendage neogenesis were identified at different time points after treatment with the macrophage cytokine-based decellularized hydrogels. Consequently, the concentric decellularized hydrogels with spatiotemporal dynamics of immune cytokines have considerable potential for cell-free therapy for wound healing.
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Affiliation(s)
- Huimin Xiao
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China.
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Xin Chen
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China.
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Jianyang Shan
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Xuanzhe Liu
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Yi Sun
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Junjie Shen
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Yimin Chai
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Gen We
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China.
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Yaling Yu
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China.
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9
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Sokolova N, Zilova L, Wittbrodt J. Unravelling the link between embryogenesis and adult stem cell potential in the ciliary marginal zone: A comparative study between mammals and teleost fish. Cells Dev 2023; 174:203848. [PMID: 37172718 DOI: 10.1016/j.cdev.2023.203848] [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: 02/28/2023] [Revised: 05/03/2023] [Accepted: 05/05/2023] [Indexed: 05/15/2023]
Abstract
The discovery and study of adult stem cells have revolutionized regenerative medicine by offering new opportunities for treating various medical conditions. Anamniote stem cells, which retain their full proliferative capacity and full differentiation range throughout their lifetime, harbour a greater potential compared to mammalian adult stem cells, which only exhibit limited stem cell potential. Therefore, understanding the mechanisms underlying these differences is of significant interest. In this review, we examine the similarities and differences of adult retinal stem cells in anamniotes and mammals, from their embryonic stages in the optic vesicle to their residence in the postembryonic retinal stem cell niche, the ciliary marginal zone located in the retinal periphery. In anamniotes, developing precursors of retinal stem cells are exposed to various environmental cues during their migration in the complex morphogenetic remodelling of the optic vesicle to the optic cup. In contrast, their mammalian counterparts in the retinal periphery are primarily instructed by neighbouring tissues once they are in place. We explore the distinct modes of optic cup morphogenesis in mammals and teleost fish and highlight molecular mechanisms governing morphogenesis and stem cells instruction. The review concludes with the molecular mechanisms of ciliary marginal zone formation and offers a perspective on the impact of comparative single cell transcriptomic studies to reveal the evolutionary similarities and differences.
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Affiliation(s)
- Natalia Sokolova
- Centre for Organismal Studies Heidelberg, Germany; Heidelberg Biosciences International Graduate School, Germany
| | - Lucie Zilova
- Centre for Organismal Studies Heidelberg, Germany.
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Abstract
Cardiovascular diseases are a group of heart and blood vessel disorders which remain a leading cause of morbidity and mortality worldwide. Currently, cardiovascular disease research commonly depends on in vivo rodent models and in vitro human cell culture models. Despite their widespread use in cardiovascular disease research, there are some long-standing limitations: animal models often fail to faithfully mimic human response, while traditional cell models ignore the in vivo microenvironment, intercellular communications, and tissue-tissue interactions. The convergence of microfabrication and tissue engineering has given rise to organ-on-a-chip technologies. The organ-on-a-chip is a microdevice containing microfluidic chips, cells, and extracellular matrix to reproduce the physiological processes of a certain part of the human body, and is nowadays considered a promising bridge between in vivo models and in vitro 2D or 3D cell culture models. Considering the difficulty in obtaining human vessel and heart samples, the development of vessel-on-a-chip and heart-on-a-chip systems can guide cardiovascular disease research in the future. In this review, we elaborate methods and materials to fabricate organ-on-a-chip systems and summarize the construction of vessel and heart chips. The construction of vessels-on-a-chip must consider the cyclic mechanical stretch and fluid shear stress, while hemodynamic forces and cardiomyocyte maturation are key factors in building hearts-on-a-chip. We also introduce the application of organs-on-a-chip in cardiovascular disease study.
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11
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Progenitor-derived endothelin controls dermal sheath contraction for hair follicle regression. Nat Cell Biol 2023; 25:222-234. [PMID: 36717629 PMCID: PMC9931655 DOI: 10.1038/s41556-022-01065-w] [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: 09/24/2021] [Accepted: 11/28/2022] [Indexed: 02/01/2023]
Abstract
Substantial follicle remodelling during the regression phase of the hair growth cycle is coordinated by the contraction of the dermal sheath smooth muscle, but how dermal-sheath-generated forces are regulated is unclear. Here, we identify spatiotemporally controlled endothelin signalling-a potent vasoconstriction-regulating pathway-as the key activating mechanism of dermal sheath contraction. Pharmacological blocking or genetic ablation of both endothelin receptors, ETA and ETB, impedes dermal sheath contraction and halts follicle regression. Epithelial progenitors at the club hair-epithelial strand bottleneck produce the endothelin ligand ET-1, which is required for follicle regression. ET signalling in dermal sheath cells and downstream contraction is dynamically regulated by cytoplasmic Ca2+ levels through cell membrane and sarcoplasmic reticulum calcium channels. Together, these findings illuminate an epithelial-mesenchymal interaction paradigm in which progenitors-destined to undergo programmed cell death-control the contraction of the surrounding sheath smooth muscle to orchestrate homeostatic tissue regression and reorganization for the next stem cell activation and regeneration cycle.
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12
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Sunkara RR, Mehta D, Sarate RM, Waghmare SK. BMP-AKT-GSK3β signalling restores hair follicle stem cells decrease associated with loss of Sfrp1. Stem Cells 2022; 40:802-817. [PMID: 35689817 DOI: 10.1093/stmcls/sxac041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 04/05/2022] [Indexed: 11/15/2022]
Abstract
Wnt signaling plays a pivotal role in regulating activation, proliferation, stem cell renewal and differentiation of hair follicle stem cells (HFSCs). Secreted frizzled related protein-1 (Sfrp1), a Wnt antagonist is up regulated in the HFSCs; however, its role in the HFSCs regulation is still obscure. Here, we show that Sfrp1 loss showed a depletion of HFSCs, enhanced HFSC proliferation and faster hair follicle cycle at PD21 to PD28, HFSC markers such as Lgr5 and Axin2 were decreased in both the Sfrp1 +/- and Sfrp1 -/- HFSCs. In addition, the second hair follicle cycle was also faster as compared to WT. Importantly, Sfrp1 -/- showed a restoration of HFSC by 2 nd telogen (PD49), while Sfrp1+/- did not show restoration with still having a decreased HFSC. Infact, restoration of HFSCs was due to a pronounced down-regulation of β-CATENIN activity mediated through a cross-talk of BMP-AKT-GSK3β signalling in Sfrp1-/- as compared to Sfrp1+/-, where down regulation was less pronounced. In cultured keratinocytes, Sfrp1 loss resulted in enhanced proliferation and clonogenicity, which were reversed by treating with either BMPR1A or GSK3β inhibitor thereby confirming BMP-AKT-GSK3β signaling involved in β-CATENIN regulation in both the Sfrp1 +/- and Sfrp1 -/- mice. Our study reveals a novel function of Sfrp1 by unravelling an in vivo molecular mechanism that regulate the HFSCs pool mediated through a hitherto unknown cross-talk of BMP-AKT-GSK3β signalling that maintain stem cell pool balance, which in turn maintain skin tissue homeostasis.
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Affiliation(s)
- Raghava R Sunkara
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, India
| | - Darshan Mehta
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, India
| | - Rahul M Sarate
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, India
| | - Sanjeev K Waghmare
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, India
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13
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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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14
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Pincha N, Marangoni P, Haque A, Klein OD. Parallels in signaling between development and regeneration in ectodermal organs. Curr Top Dev Biol 2022; 149:373-419. [PMID: 35606061 PMCID: PMC10049776 DOI: 10.1016/bs.ctdb.2022.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Ectodermal organs originate from the outermost germ layer of the developing embryo and include the skin, hair, tooth, nails, and exocrine glands. These organs develop through tightly regulated, sequential and reciprocal epithelial-mesenchymal crosstalk, and they eventually assume various morphologies and functions while retaining the ability to regenerate. As with many other tissues in the body, the development and morphogenesis of these organs are regulated by a set of common signaling pathways, such as Shh, Wnt, Bmp, Notch, Tgf-β, and Eda. However, subtle differences in the temporal activation, the multiple possible combinations of ligand-receptor activation, the various cofactors, as well as the underlying epigenetic modulation determine how each organ develops into its adult form. Although each organ has been studied separately in considerable detail, the mechanisms underlying the parallels and differences in signaling that regulate their development have rarely been investigated. First, we will use the tooth, the hair follicle, and the mammary gland as representative ectodermal organs to explore how the development of signaling centers and establishment of stem cell populations influence overall growth and morphogenesis. Then we will compare how some of the major signaling pathways (Shh, Wnt, Notch and Yap/Taz) differentially regulate developmental events. Finally, we will discuss how signaling regulates regenerative processes in all three.
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Affiliation(s)
- Neha Pincha
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, CA, United States
| | - Pauline Marangoni
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, CA, United States
| | - Ameera Haque
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, CA, United States
| | - Ophir D Klein
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, CA, United States; Department of Pediatrics and Institute for Human Genetics, University of California, San Francisco, CA, United States.
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15
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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: 14] [Impact Index Per Article: 7.0] [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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16
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Wang J, He J, Zhu M, Han Y, Yang R, Liu H, Xu X, Chen X. Cellular Heterogeneity and Plasticity of Skin Epithelial Cells in Wound Healing and Tumorigenesis. Stem Cell Rev Rep 2022; 18:1912-1925. [PMID: 35143021 PMCID: PMC9391238 DOI: 10.1007/s12015-021-10295-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2021] [Indexed: 12/20/2022]
Abstract
Cellular differentiation, the fundamental hallmark of cells, plays a critical role in homeostasis. And stem cells not only regulate the process where embryonic stem cells develop into a complete organism, but also replace ageing or damaged cells by proliferation, differentiation and migration. In characterizing distinct subpopulations of skin epithelial cells, stem cells show large heterogeneity and plasticity for homeostasis, wound healing and tumorigenesis. Epithelial stem cells and committed progenitors replenish each other or by themselves owing to the remarkable plasticity and heterogeneity of epidermal cells under certain circumstance. The development of new assay methods, including single-cell RNA sequence, lineage tracing assay, intravital microscopy systems and photon-ablation assay, highlight the plasticity of epidermal stem cells in response to injure and tumorigenesis. However, the critical mechanisms and key factors that regulate cellular plasticity still need for further exploration. In this review, we discuss the recent insights about the heterogeneity and plasticity of epithelial stem cells in homeostasis, wound healing and skin tumorigenesis. Understanding how stem cells collaborate together to repair injury and initiate tumor will offer new solutions for relevant diseases. Schematic abstract of cellular heterogeneity and plasticity of skin epithelial cells in wound healing and tumorigenesis.
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Affiliation(s)
- Jingru Wang
- Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China.,Department of Burn Surgery, First People's Hospital of Foshan, Foshan, China
| | - Jia He
- Department of Burn Surgery, First People's Hospital of Foshan, Foshan, China.,School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou, China
| | - Meishu Zhu
- Department of Burn and Plastic Surgery, Second People's Hospital of Shenzhen, First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Yan Han
- The Yonghe Medical Group Limited Company, George Town, Cayman Islands
| | - Ronghua Yang
- Department of Burn Surgery, First People's Hospital of Foshan, Foshan, China
| | - Hongwei Liu
- Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China.
| | - Xuejuan Xu
- Endocrinology Department, First People's Hospital of Foshan, Foshan, China.
| | - Xiaodong Chen
- Department of Burn Surgery, First People's Hospital of Foshan, Foshan, China.
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17
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Zhang C, Wang D, Wang J, Wang L, Qiu W, Kume T, Dowell R, Yi R. Escape of hair follicle stem cells causes stem cell exhaustion during aging. NATURE AGING 2021; 1:889-903. [PMID: 37118327 PMCID: PMC11323283 DOI: 10.1038/s43587-021-00103-w] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 07/25/2021] [Indexed: 04/30/2023]
Abstract
Stem cell (SC) exhaustion is a hallmark of aging. However, the process of SC depletion during aging has not been observed in live animals, and the underlying mechanism contributing to tissue deterioration remains obscure. We find that, in aged mice, epithelial cells escape from the hair follicle (HF) SC compartment to the dermis, contributing to HF miniaturization. Single-cell RNA-seq and assay for transposase-accessible chromatin using sequencing (ATAC-seq) reveal reduced expression of cell adhesion and extracellular matrix genes in aged HF-SCs, many of which are regulated by Foxc1 and Nfatc1. Deletion of Foxc1 and Nfatc1 recapitulates HF miniaturization and causes hair loss. Live imaging captures individual epithelial cells migrating away from the SC compartment and HF disintegration. This study illuminates a hitherto unknown activity of epithelial cells escaping from their niche as a mechanism underlying SC reduction and tissue degeneration. Identification of homeless epithelial cells in aged tissues provides a new perspective for understanding aging-associated diseases.
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Affiliation(s)
- Chi Zhang
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
- Department of Pathology, Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Dongmei Wang
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
- Department of Pathology, Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Jingjing Wang
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
- Department of Pathology, Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Li Wang
- 10x Genomics, Pleasanton, CA, USA
| | - Wenli Qiu
- Lung Biology Center, Department of Medicine, UCSF, San Francisco, CA, USA
| | - Tsutomu Kume
- Feinberg Cardiovascular and Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Robin Dowell
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
- BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, USA
| | - Rui Yi
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA.
- Department of Pathology, Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
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18
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Rico-Leo EM, Lorenzo-Martín LF, Román ÁC, Bustelo XR, Merino JM, Fernández-Salguero PM. Aryl hydrocarbon receptor controls skin homeostasis, regeneration, and hair follicle cycling by adjusting epidermal stem cell function. Stem Cells 2021; 39:1733-1750. [PMID: 34423894 DOI: 10.1002/stem.3443] [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] [Received: 03/02/2021] [Accepted: 07/28/2021] [Indexed: 12/20/2022]
Abstract
Skin integrity requires constant maintenance of a quiescent, yet responsive, population of stem cells. While interfollicular epidermal progenitors control normal homeostasis, hair follicle stem cells residing within the bulge provide regenerative potential during hair cycle and in response to wounding. The aryl hydrocarbon receptor (AhR) modulates cell plasticity and differentiation and its overactivation results in severe skin lesions in humans. However, its physiological role in skin homeostasis and hair growth is unknown. Reconstitution assays grafting primary keratinocytes and dermal fibroblasts into nude mice and 3-D epidermal equivalents revealed a positive role for AhR in skin regeneration, epidermal differentiation, and stem cell maintenance. Furthermore, lack of receptor expression in AhR-/- mice delayed morphogenesis and impaired hair regrowth with a phenotype closely correlating with a reduction in suprabasal bulge stem cells (α6low CD34+ ). Moreover, RNA-microarray and RT-qPCR analyses of fluorescence-activated cell sorting (FACS)-isolated bulge stem cells revealed that AhR depletion impaired transcriptional signatures typical of both epidermal progenitors and bulge stem cells but upregulated differentiation markers likely compromising their undifferentiated phenotype. Altogether, our findings support that AhR controls skin regeneration and homeostasis by ensuring epidermal stem cell identity and highlights this receptor as potential target for the treatment of cutaneous pathologies.
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Affiliation(s)
- Eva María Rico-Leo
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Spain.,Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Badajoz, Spain
| | | | - Ángel Carlos Román
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Spain
| | - Xosé Ramón Bustelo
- Centro de Investigación del Cáncer and CIBERONC, CSIC-Universidad de Salamanca, Salamanca, Spain
| | - Jaime María Merino
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Spain.,Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Badajoz, Spain
| | - Pedro María Fernández-Salguero
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Spain.,Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Badajoz, Spain
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19
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Wang M, Sun Y, Li C, Qu J, Zhou B. Eosinophils Correlate with Epithelial-Mesenchymal Transition in Chronic Rhinosinusitis with Nasal Polyps. ORL J Otorhinolaryngol Relat Spec 2021; 84:70-80. [PMID: 34229321 DOI: 10.1159/000516847] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 04/07/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Chronic inflammation and tissue remodeling always occur together in chronic rhinosinusitis (CRS). Epithelial-mesenchymal transition (EMT) plays a critical role in airway remodeling. OBJECTIVE Changes of epithelial cells in sinus mucosa in different subtypes of CRS, especially in eosinophilic chronic rhinosinusitis with nasal polyps, and the role of EMT and eosinophils (EOS) in airway remodeling are still unknown. METHODS We included 85 patients in this study. They were divided into 4 groups: a normal control (NC) group, a chronic rhinosinusitis without nasal polyps (CRSsNP) group, an eosinophilic chronic rhinosinusitis with nasal polyps (ECRSwNP) group, and a noneosinophilic chronic rhinosinusitis with nasal polyps (non-ECRSwNP) group. Clinical data were all collected and analyzed. Standard hematoxylin and eosin staining, immunohistochemical staining, and 2-color immunofluorescence staining were performed. Biomarkers of EMT, epithelial cadherin, and vimentin were labeled. The immunohistochemistry results of each group were counted and statistically analyzed. RESULTS AND CONCLUSION E-cadherin was downregulated, and vimentin was upregulated in epithelial tissue from the ECRSwNP group, compared with that from the control group and the other groups. The number of vimentin-expressing epithelial cells correlated with sinus CT imaging Lund-Mackay scores (r = 0.560, p < 0.001). Moreover, expression levels of vimentin in the epithelium were associated with numbers of infiltrating EOS in tissues (r = 0.710, p < 0.001) and the peripheral blood EOS ratio (r = 0.594, p < 0.001). EMT occurred in patients with CRSwNP, especially in those with ECRSwNP. Epithelial reprogramming correlates with eosinophil infiltration and disease severity. Eosinophils contributed to impairment of epithelial function and promoted EMT in CRSwNP.
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Affiliation(s)
- Mingjie Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otorhinolaryngology, Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing, China
| | - Yan Sun
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otorhinolaryngology, Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing, China
| | - Cheng Li
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otorhinolaryngology, Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing, China
| | - Jing Qu
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otorhinolaryngology, Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing, China
| | - Bing Zhou
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otorhinolaryngology, Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing, China
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20
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Li KN, Tumbar T. Hair follicle stem cells as a skin-organizing signaling center during adult homeostasis. EMBO J 2021; 40:e107135. [PMID: 33880808 PMCID: PMC8167365 DOI: 10.15252/embj.2020107135] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 12/16/2020] [Accepted: 02/09/2021] [Indexed: 12/12/2022] Open
Abstract
Stem cells are the essential source of building blocks for tissue homeostasis and regeneration. Their behavior is dictated by both cell-intrinsic cues and extrinsic cues from the microenvironment, known as the stem cell niche. Interestingly, recent work began to demonstrate that hair follicle stem cells (HFSCs) are not only passive recipients of signals from the surroundings, but also actively send out signals to modulate the organization and function of their own niches. Here, we discuss recent findings, and briefly refer to the old, on the interaction of HFSCs and their niches with the emphasis on the outwards signals from HFSCs toward their niches. We also highlight recent technology advancements that further promote our understanding of HFSC niches. Taken together, the HFSCs emerge as a skin-organizing center rich in signaling output for niche remodeling during various stages of adult skin homeostasis. The intricate crosstalk between HFSCs and their niches adds important insight to skin biology that will inform clinical and bioengineering fields aiming to build complete and functional 3D organotypic cultures for skin replacement therapies.
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Affiliation(s)
- Kefei Nina Li
- Molecular Biology and GeneticsCornell UniversityIthacaNYUSA
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21
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Chovatiya G, Ghuwalewala S, Walter LD, Cosgrove BD, Tumbar T. High-resolution single-cell transcriptomics reveals heterogeneity of self-renewing hair follicle stem cells. Exp Dermatol 2021; 30:457-471. [PMID: 33319418 PMCID: PMC8016723 DOI: 10.1111/exd.14262] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/30/2020] [Accepted: 12/09/2020] [Indexed: 12/17/2022]
Abstract
Multipotent bulge stem cells (SCs) fuel the hair follicle (HF) cyclic growth during adult skin homeostasis, but their intrinsic molecular heterogeneity is not well understood. These hair follicle stem cells (HFSCs) engage in bouts of self-renewal, migration and differentiation during the hair cycle. Here, we perform high-resolution single-cell RNA sequencing (scRNA-seq) of HFSCs sorted as CD34+ /K14-H2BGFP+ from mouse skin at mid-anagen, the self-renewal stage. We dissect the transcriptomic profiles and unravel population-specific transcriptional heterogeneity. Unsupervised clustering reveals five major HFSC populations, which distinguished by known markers associated with both the bulge and the outer root sheath (ORS) underneath. These populations include quiescent bulge, ORS cellular states and proliferative cells. Lineage trajectory analysis predicted the prospective differentiation path of these cellular states and their corresponding self-renewing subpopulations. The bulge population itself can be further sub-divided into distinct subpopulations that can be mapped to the upper, mid and lower bulge regions, and present a decreasing quiescence score. Gene set enrichment analysis (GSEA) revealed new markers and suggested potentially distinct functions of the ORS and bulge subpopulations. This included communications between the upper bulge subpopulation and sensory nerves and between the upper ORS and skin vasculature, as well as enrichment of a bulge subset in cell migratory functions. The lower ORS enriched genes may potentially enable nutrients passing from the surrounding fat and vasculature cells towards the proliferating hair matrix cells. Thus, we provide a comprehensive account of HFSC molecular heterogeneity during their self-renewing stage, which enables future HF functional studies.
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Affiliation(s)
- Gopal Chovatiya
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USA
| | - Sangeeta Ghuwalewala
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USA
| | - Lauren D. Walter
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USA
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York, USA
| | - Benjamin D. Cosgrove
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York, USA
| | - Tudorita Tumbar
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USA
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22
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Hsu YC, Rendl M. Skin stem cells in health and in disease. Exp Dermatol 2021; 30:424-429. [PMID: 33792993 DOI: 10.1111/exd.14318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 03/05/2021] [Accepted: 03/05/2021] [Indexed: 12/17/2022]
Affiliation(s)
- Ya-Chieh Hsu
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA.,Harvard Stem Cell Institute, Cambridge, MA, USA
| | - Michael Rendl
- Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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23
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Martino PA, Heitman N, Rendl M. The dermal sheath: An emerging component of the hair follicle stem cell niche. Exp Dermatol 2021; 30:512-521. [PMID: 33006790 PMCID: PMC8016715 DOI: 10.1111/exd.14204] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/15/2020] [Accepted: 09/20/2020] [Indexed: 12/17/2022]
Abstract
Hair follicles cyclically regenerate throughout adult mammalian life, owing to a resident population of epithelial hair follicle stem cells. Stem cell (SC) activity drives bouts of follicle growth, which are periodically interrupted by follicle regression and rest. These phases and the transitions between them are tightly spatiotemporally coordinated by signalling crosstalk between stem/progenitor cells and the various cell types of the microenvironment, or niche. The dermal papilla (DP) is a cluster of specialized mesenchymal cells that have long been recognized for important niche roles in regulating hair follicle SC activation, as well as progenitor proliferation and differentiation during follicle growth. In addition to the DP, the mesenchyme of the murine pelage follicle is also comprised of a follicle-lining smooth muscle known as the dermal sheath (DS), which has been far less studied than the DP yet may be equally specialized and important for hair cycling. In this review, we define the murine pelage DS in comparison with human DS and discuss recent work that highlights the emergent importance of the DS in the hair follicle SC niche. Last, we examine potential therapeutic applications for the DS in hair regeneration and wound healing.
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Affiliation(s)
- Pieter A. Martino
- Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, Atran Building AB7-10C, Box 1020; 1428 Madison Ave, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, Atran Building AB7-10C, Box 1020; 1428 Madison Ave, New York, NY 10029, USA
| | - Nicholas Heitman
- Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, Atran Building AB7-10C, Box 1020; 1428 Madison Ave, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, Atran Building AB7-10C, Box 1020; 1428 Madison Ave, New York, NY 10029, USA
| | - Michael Rendl
- Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, Atran Building AB7-10C, Box 1020; 1428 Madison Ave, New York, NY 10029, USA
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, Atran Building AB7-10C, Box 1020; 1428 Madison Ave, New York, NY 10029, USA
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, Atran Building AB7-10C, Box 1020; 1428 Madison Ave, New York, NY 10029, USA
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24
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Sunkara RR, Koulgi S, Jani V, Gadewal N, Sonavane U, Joshi R, Waghmare SK. Understanding the binding affinities between SFRP1 CRD, SFRP1 Netrin, Wnt 5B and frizzled receptors 2, 3 and 7 using MD simulations. J Biomol Struct Dyn 2021; 40:6831-6844. [PMID: 33666148 DOI: 10.1080/07391102.2021.1890219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
cWnt-signalling plays a crucial role in stem cell maintenance and tissue homeostasis. Secreted frizzled-related proteins(SFRP), Wnt inhibitors consist of the N-terminal cysteine rich domain(CRD) and the C-terminal netrin(NTR) domain. SFRP1 binds to the Wnt ligands and frizzled receptors(FZ) either through its SFRP1CRD or through its SFRP1Netrin domains; however, very little is known on these binding affinities. Here, we attempted to understand the interactions and binding affinities of SFRP1-Wnt5B, SFRP1-FZ(2, 3 & 7) and Wnt5B-FZ(2, 3 & 7) that are mainly expressed in murine hair follicle stem cells. SFRP1CRD, SFRP1Netrin, Wnt5B and FZ(2, 3 & 7) structures were built using homology modelling, followed by their molecular dynamics simulations. SFRP1CRD showed lower fluctuation when in complex with FZ2, FZ3 and FZ7 and Wnt5B as compared to SFRP1Netrin using RMSF and RMSD. However, free energy showed SFRP1Netrin was energetically more stable than SFRP1CRD. SFRP1Netrin formed more number of interactions with FZ as compared to SFRP1CRD. Importantly, SFRP1Netrin favoured binding to the FZ receptors(FZ3 > FZ7 > FZ2) as compared to Wnt5B ligand. Conversely, the SFRP1CRD showed more affinity towards the Wnt5B ligand as compared to FZ receptors. Wnt5B showed the best binding affinity with FZ3 followed by SFRP1CRD and SFRP1Netrin. Therefore, SFRP1Netrin can bind to the FZ3 with higher binding affinity and may inhibit non-canonical Wnt-signalling pathway. Our study provides the comprehensive information on the binding affinities among the Wnt5B, SFRP1CRD/Netrin and FZ(2, 3 & 7). Thus, this information might also help in designing novel strategies to inhibit aberrant Wnt-signalling.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Raghava R Sunkara
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Navi Mumbai, India.,Homi Bhabha National Institute, Training School Complex, Mumbai, India
| | - Shruti Koulgi
- High Performance Computing-Medical and Bioinformatics Group, Centre for Development of Advanced Computing, Panchawati, Pashan, Pune, India
| | - Vinod Jani
- High Performance Computing-Medical and Bioinformatics Group, Centre for Development of Advanced Computing, Panchawati, Pashan, Pune, India
| | - Nikhil Gadewal
- Bioinformatics Centre, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Navi Mumbai, India
| | - Uddhavesh Sonavane
- High Performance Computing-Medical and Bioinformatics Group, Centre for Development of Advanced Computing, Panchawati, Pashan, Pune, India
| | - Rajendra Joshi
- High Performance Computing-Medical and Bioinformatics Group, Centre for Development of Advanced Computing, Panchawati, Pashan, Pune, India
| | - Sanjeev K Waghmare
- Stem Cell Biology Group, Waghmare Lab, Cancer Research Institute, Advanced Centre for Treatment Research and Education in Cancer (ACTREC), Tata Memorial Centre, Navi Mumbai, India.,Homi Bhabha National Institute, Training School Complex, Mumbai, India
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25
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Takeo M, Asakawa K, Toyoshima KE, Ogawa M, Tong J, Irié T, Yanagisawa M, Sato A, Tsuji T. Expansion and characterization of epithelial stem cells with potential for cyclical hair regeneration. Sci Rep 2021; 11:1173. [PMID: 33568688 PMCID: PMC7876088 DOI: 10.1038/s41598-020-80624-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 12/21/2020] [Indexed: 12/17/2022] Open
Abstract
In mammals, organ induction occurs only during embryonic development except for hair follicles (HFs). However, HF-resident epithelial stem cells (HFSCs), which are responsible for repetitive HF regeneration, are not fully characterized. Here, we establish in vitro culture systems that are capable of controlling the ability of HFSCs to regenerate HFs. Based on a method that precisely controlled the number of HFs for regeneration, functional analysis revealed that CD34/CD49f/integrin β5 (Itgβ5)-triple-positive (CD34+/CD49f+/Itgβ5+) cells have multipotency and functional significance for continual hair regeneration. In native HFs, these cells reside in the uppermost area of the bulge region, which is surrounded by tenascin in mice and humans. This study unveils the subpopulation of HFSCs responsible for long-term hair cycling of HFs regenerated from bioengineered HF germ, suggesting the presence of functional heterogeneity among bulge HFSCs and the utility of our culture system to achieve HF regenerative therapy.
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Affiliation(s)
- Makoto Takeo
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology (CDB) and RIKEN Center for Biosystems Dynamics Research (BDR), Hyogo, 650-0047, Japan
| | - Kyosuke Asakawa
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology (CDB) and RIKEN Center for Biosystems Dynamics Research (BDR), Hyogo, 650-0047, Japan
| | - Koh-Ei Toyoshima
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology (CDB) and RIKEN Center for Biosystems Dynamics Research (BDR), Hyogo, 650-0047, Japan.,Organ Technologies Inc., Tokyo, 101-0048, Japan
| | - Miho Ogawa
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology (CDB) and RIKEN Center for Biosystems Dynamics Research (BDR), Hyogo, 650-0047, Japan.,Organ Technologies Inc., Tokyo, 101-0048, Japan
| | - JingJing Tong
- Department of Bioscience, Graduate School of Science and Technology, Kwansei-Gakuin University, Hyogo, 669-1337, Japan
| | - Tarou Irié
- Division of Anatomical and Cellular Pathology, Department of Pathology, Iwate Medical University, Iwate, 028-3694, Japan
| | - Masayuki Yanagisawa
- Department of Plastic and Aesthetic Surgery, School of Medicine, Kitasato University, Kanagawa, 252-0375, Japan
| | - Akio Sato
- Department of Plastic and Reconstructive Surgery, School of Medicine, Keio University, Tokyo, 160-8582, Japan
| | - Takashi Tsuji
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology (CDB) and RIKEN Center for Biosystems Dynamics Research (BDR), Hyogo, 650-0047, Japan. .,Organ Technologies Inc., Tokyo, 101-0048, Japan. .,Department of Bioscience, Graduate School of Science and Technology, Kwansei-Gakuin University, Hyogo, 669-1337, Japan. .,Department of Plastic and Aesthetic Surgery, School of Medicine, Kitasato University, Kanagawa, 252-0375, Japan. .,Department of Plastic and Reconstructive Surgery, School of Medicine, Keio University, Tokyo, 160-8582, Japan.
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26
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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: 33] [Impact Index Per Article: 8.3] [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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27
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Daszczuk P, Mazurek P, Pieczonka TD, Olczak A, Boryń ŁM, Kobielak K. An Intrinsic Oscillation of Gene Networks Inside Hair Follicle Stem Cells: An Additional Layer That Can Modulate Hair Stem Cell Activities. Front Cell Dev Biol 2020; 8:595178. [PMID: 33363148 PMCID: PMC7758224 DOI: 10.3389/fcell.2020.595178] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 11/16/2020] [Indexed: 12/17/2022] Open
Abstract
This article explores and summarizes recent progress in and the characterization of main players in the regulation and cyclic regeneration of hair follicles. The review discusses current views and discoveries on the molecular mechanisms that allow hair follicle stem cells (hfSCs) to synergistically integrate homeostasis during quiescence and activation. Discussion elaborates on a model that shows how different populations of skin stem cells coalesce intrinsic and extrinsic mechanisms, resulting in the maintenance of stemness and hair regenerative potential during an organism’s lifespan. Primarily, we focus on the question of how the intrinsic oscillation of gene networks in hfSCs sense and respond to the surrounding niche environment. The review also investigates the existence of a cell-autonomous mechanism and the reciprocal interactions between molecular signaling axes in hfSCs and niche components, which demonstrates its critical driving force in either the activation of whole mini-organ regeneration or quiescent homeostasis maintenance. These exciting novel discoveries in skin stem cells and the surrounding niche components propose a model of the intrinsic stem cell oscillator which is potentially instructive for translational regenerative medicine. Further studies, deciphering of the distribution of molecular signals coupled with the nature of their oscillation within the stem cells and niche environments, may impact the speed and efficiency of various approaches that could stimulate the development of self-renewal and cell-based therapies for hair follicle stem cell regeneration.
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Affiliation(s)
- Patrycja Daszczuk
- Laboratory of Stem Cells, Development and Tissue Regeneration, Centre of New Technologies (CeNT), University of Warsaw (UW), Warsaw, Poland
| | - Paula Mazurek
- Laboratory of Stem Cells, Development and Tissue Regeneration, Centre of New Technologies (CeNT), University of Warsaw (UW), Warsaw, Poland
| | - Tomasz D Pieczonka
- Laboratory of Stem Cells, Development and Tissue Regeneration, Centre of New Technologies (CeNT), University of Warsaw (UW), Warsaw, Poland
| | - Alicja Olczak
- Laboratory of Stem Cells, Development and Tissue Regeneration, Centre of New Technologies (CeNT), University of Warsaw (UW), Warsaw, Poland
| | - Łukasz M Boryń
- Laboratory of Stem Cells, Development and Tissue Regeneration, Centre of New Technologies (CeNT), University of Warsaw (UW), Warsaw, Poland
| | - Krzysztof Kobielak
- Laboratory of Stem Cells, Development and Tissue Regeneration, Centre of New Technologies (CeNT), University of Warsaw (UW), Warsaw, Poland
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28
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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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29
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Shwartz Y, Gonzalez-Celeiro M, Chen CL, Pasolli HA, Sheu SH, Fan SMY, Shamsi F, Assaad S, Lin ETY, Zhang B, Tsai PC, He M, Tseng YH, Lin SJ, Hsu YC. Cell Types Promoting Goosebumps Form a Niche to Regulate Hair Follicle Stem Cells. Cell 2020; 182:578-593.e19. [PMID: 32679029 DOI: 10.1016/j.cell.2020.06.031] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 04/06/2020] [Accepted: 06/18/2020] [Indexed: 02/08/2023]
Abstract
Piloerection (goosebumps) requires concerted actions of the hair follicle, the arrector pili muscle (APM), and the sympathetic nerve, providing a model to study interactions across epithelium, mesenchyme, and nerves. Here, we show that APMs and sympathetic nerves form a dual-component niche to modulate hair follicle stem cell (HFSC) activity. Sympathetic nerves form synapse-like structures with HFSCs and regulate HFSCs through norepinephrine, whereas APMs maintain sympathetic innervation to HFSCs. Without norepinephrine signaling, HFSCs enter deep quiescence by down-regulating the cell cycle and metabolism while up-regulating quiescence regulators Foxp1 and Fgf18. During development, HFSC progeny secretes Sonic Hedgehog (SHH) to direct the formation of this APM-sympathetic nerve niche, which in turn controls hair follicle regeneration in adults. Our results reveal a reciprocal interdependence between a regenerative tissue and its niche at different stages and demonstrate sympathetic nerves can modulate stem cells through synapse-like connections and neurotransmitters to couple tissue production with demands.
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Affiliation(s)
- Yulia Shwartz
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA
| | - Meryem Gonzalez-Celeiro
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA; Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Chih-Lung Chen
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 100, Taiwan
| | - H Amalia Pasolli
- Electron Microscopy Resource Center, The Rockefeller University, New York, NY 10065, USA
| | - Shu-Hsien Sheu
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA
| | - Sabrina Mai-Yi Fan
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 100, Taiwan
| | - Farnaz Shamsi
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Steven Assaad
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA
| | - Edrick Tai-Yu Lin
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 100, Taiwan
| | - Bing Zhang
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA
| | - Pai-Chi Tsai
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA
| | - Megan He
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA; Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA
| | - Yu-Hua Tseng
- Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA; Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215, USA
| | - Sung-Jan Lin
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 100, Taiwan; Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei 100, Taiwan; Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei 100, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan.
| | - Ya-Chieh Hsu
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA.
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30
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Dekoninck S, Hannezo E, Sifrim A, Miroshnikova YA, Aragona M, Malfait M, Gargouri S, de Neunheuser C, Dubois C, Voet T, Wickström SA, Simons BD, Blanpain C. Defining the Design Principles of Skin Epidermis Postnatal Growth. Cell 2020; 181:604-620.e22. [PMID: 32259486 PMCID: PMC7198979 DOI: 10.1016/j.cell.2020.03.015] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 02/10/2020] [Accepted: 03/05/2020] [Indexed: 11/20/2022]
Abstract
During embryonic and postnatal development, organs and tissues grow steadily to achieve their final size at the end of puberty. However, little is known about the cellular dynamics that mediate postnatal growth. By combining in vivo clonal lineage tracing, proliferation kinetics, single-cell transcriptomics, and in vitro micro-pattern experiments, we resolved the cellular dynamics taking place during postnatal skin epidermis expansion. Our data revealed that harmonious growth is engineered by a single population of developmental progenitors presenting a fixed fate imbalance of self-renewing divisions with an ever-decreasing proliferation rate. Single-cell RNA sequencing revealed that epidermal developmental progenitors form a more uniform population compared with adult stem and progenitor cells. Finally, we found that the spatial pattern of cell division orientation is dictated locally by the underlying collagen fiber orientation. Our results uncover a simple design principle of organ growth where progenitors and differentiated cells expand in harmony with their surrounding tissues.
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Affiliation(s)
- Sophie Dekoninck
- Université Libre de Bruxelles, Laboratory of Stem Cells and Cancer, Brussels 1070, Belgium
| | - Edouard Hannezo
- Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria; The Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Alejandro Sifrim
- Department of Human Genetics, University of Leuven, KU Leuven, Leuven, Belgium; Wellcome Sanger Institute, Sanger Institute - EBI Single-Cell Genomics Centre, Hinxton, UK
| | - Yekaterina A Miroshnikova
- Helsinki Institute of Life Science, University of Helsinki, Biomedicum, Haartmaninkatu 8, 00290 Helsinki, Finland; Wihuri Research Institute, Biomedicum, Haartmaninkatu 8, 00290 Helsinki, Finland; Max Planck Institute for Biology of Ageing, Joseph Stelzmann Str. 9b, 50931 Cologne, Germany
| | - Mariaceleste Aragona
- Université Libre de Bruxelles, Laboratory of Stem Cells and Cancer, Brussels 1070, Belgium
| | - Milan Malfait
- Université Libre de Bruxelles, Laboratory of Stem Cells and Cancer, Brussels 1070, Belgium
| | - Souhir Gargouri
- Université Libre de Bruxelles, Laboratory of Stem Cells and Cancer, Brussels 1070, Belgium
| | | | - Christine Dubois
- Université Libre de Bruxelles, Laboratory of Stem Cells and Cancer, Brussels 1070, Belgium
| | - Thierry Voet
- Department of Human Genetics, University of Leuven, KU Leuven, Leuven, Belgium; Wellcome Sanger Institute, Sanger Institute - EBI Single-Cell Genomics Centre, Hinxton, UK
| | - Sara A Wickström
- Helsinki Institute of Life Science, University of Helsinki, Biomedicum, Haartmaninkatu 8, 00290 Helsinki, Finland; Wihuri Research Institute, Biomedicum, Haartmaninkatu 8, 00290 Helsinki, Finland; Max Planck Institute for Biology of Ageing, Joseph Stelzmann Str. 9b, 50931 Cologne, Germany
| | - Benjamin D Simons
- The Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK; Cavendish Laboratory, Department of Physics, J. J. Thomson Avenue, Cambridge CB3 0HE, UK; Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, UK
| | - Cédric Blanpain
- Université Libre de Bruxelles, Laboratory of Stem Cells and Cancer, Brussels 1070, Belgium; WELBIO, Université Libre de Bruxelles, Brussels 1070, Belgium.
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31
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Joost S, Annusver K, Jacob T, Sun X, Dalessandri T, Sivan U, Sequeira I, Sandberg R, Kasper M. The Molecular Anatomy of Mouse Skin during Hair Growth and Rest. Cell Stem Cell 2020; 26:441-457.e7. [PMID: 32109378 DOI: 10.1016/j.stem.2020.01.012] [Citation(s) in RCA: 171] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 11/07/2019] [Accepted: 01/17/2020] [Indexed: 10/24/2022]
Abstract
Skin homeostasis is orchestrated by dozens of cell types that together direct stem cell renewal, lineage commitment, and differentiation. Here, we use single-cell RNA sequencing and single-molecule RNA FISH to provide a systematic molecular atlas of full-thickness skin, determining gene expression profiles and spatial locations that define 56 cell types and states during hair growth and rest. These findings reveal how the outer root sheath (ORS) and inner hair follicle layers coordinate hair production. We found that the ORS is composed of two intermingling but transcriptionally distinct cell types with differing capacities for interactions with stromal cell types. Inner layer cells branch from transcriptionally uncommitted progenitors, and each lineage differentiation passes through an intermediate state. We also provide an online tool to explore this comprehensive skin cell atlas, including epithelial and stromal cells such as fibroblasts, vascular, and immune cells, to spur further discoveries in skin biology.
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Affiliation(s)
- Simon Joost
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Karl Annusver
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Tina Jacob
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Xiaoyan Sun
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Tim Dalessandri
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Unnikrishnan Sivan
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Inês Sequeira
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, London, UK
| | - Rickard Sandberg
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Maria Kasper
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden.
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32
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Ding H, Cheng G, Leng J, Yang Y, Zhao X, Wang X, Qi Y, Huang D, Zhao H. Analysis of histological and microRNA profiles changes in rabbit skin development. Sci Rep 2020; 10:454. [PMID: 31949201 PMCID: PMC6965608 DOI: 10.1038/s41598-019-57327-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 10/31/2019] [Indexed: 02/08/2023] Open
Abstract
The periodic regrowth of rabbit fur is economically important. Here, we aimed to characterise the histological traits and microRNA (miRNA) expression profiles in the skin tissue of Wan Strain Angora rabbits at different weeks after plucking. Haematoxylin-eosin staining showed that hair follicles were in the telogen phase in the first week, while they were in the anagen phase from the fourth to twenty-fourth weeks. In addition, two small RNA libraries derived from skin samples of Wan Strain Angora rabbits at telogen and anagen stages yielded over 24 million high-quality reads. Specifically, 185 miRNAs were differentially expressed between the telogen and anagen phases. The function of the differentially expressed miRNAs was explored by comparing them with known mammalian miRNAs and by Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analysis of their predicted targets. Five new functional miRNAs were validated using quantitative real-time PCR. Moreover, the fibroblast growth factor 5 (FGF5) gene was verified to be a target of conservative_NC_013672.1_9290 and conservative_NC_013675.1_10734. We investigated differential miRNA profiles between the telogen and anagen phases of the hair cycle and our findings provide a basis for future studies focusing on the mechanisms of miRNA-mediated regulation of rabbit hair follicle cycling.
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Affiliation(s)
- Haisheng Ding
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230031, People's Republic of China
| | - Guanglong Cheng
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230031, People's Republic of China
| | - Jianjian Leng
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230031, People's Republic of China
| | - Yongxin Yang
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230031, People's Republic of China
| | - Xiaowei Zhao
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230031, People's Republic of China
| | - Xiaofei Wang
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230031, People's Republic of China
| | - Yunxia Qi
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230031, People's Republic of China
| | - Dongwei Huang
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230031, People's Republic of China.
| | - Huiling Zhao
- Anhui Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, 230031, People's Republic of China.
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33
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In Silico Analysis of the Age-Dependent Evolution of the Transcriptome of Mouse Skin Stem Cells. Cells 2020; 9:cells9010165. [PMID: 31936599 PMCID: PMC7016981 DOI: 10.3390/cells9010165] [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: 12/12/2019] [Revised: 01/03/2020] [Accepted: 01/06/2020] [Indexed: 12/12/2022] Open
Abstract
The stem cells located in the hair follicle bulge area are critical for skin regeneration and repair. To date, little is known about the evolution of the transcriptome of these cells across time. Here, we have combined genome-wide expression analyses and a variety of in silico tools to determine the age-dependent evolution of the transcriptome of those cells. Our results reveal that the transcriptome of skin stem cells fluctuates extensively along the lifespan of mice. The use of both unbiased and pathway-centered in silico approaches has also enabled the identification of biological programs specifically regulated at those specific time-points. It has also unveiled hubs of highly transcriptionally interconnected genes and transcriptional factors potentially located at the core of those age-specific changes.
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Wang X. Stem cells in tissues, organoids, and cancers. Cell Mol Life Sci 2019; 76:4043-4070. [PMID: 31317205 PMCID: PMC6785598 DOI: 10.1007/s00018-019-03199-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/22/2019] [Accepted: 06/17/2019] [Indexed: 12/13/2022]
Abstract
Stem cells give rise to all cells and build the tissue structures in our body, and heterogeneity and plasticity are the hallmarks of stem cells. Epigenetic modification, which is associated with niche signals, determines stem cell differentiation and somatic cell reprogramming. Stem cells play a critical role in the development of tumors and are capable of generating 3D organoids. Understanding the properties of stem cells will improve our capacity to maintain tissue homeostasis. Dissecting epigenetic regulation could be helpful for achieving efficient cell reprograming and for developing new drugs for cancer treatment. Stem cell-derived organoids open up new avenues for modeling human diseases and for regenerative medicine. Nevertheless, in addition to the achievements in stem cell research, many challenges still need to be overcome for stem cells to have versatile application in clinics.
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Affiliation(s)
- Xusheng Wang
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou, 510275, China.
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35
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Context-dependent effect of sPLA 2-IIA induced proliferation on murine hair follicle stem cells and human epithelial cancer. EBioMedicine 2019; 48:364-376. [PMID: 31521610 PMCID: PMC6838435 DOI: 10.1016/j.ebiom.2019.08.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/23/2019] [Accepted: 08/23/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Tissue stem cells (SCs) and cancer cells proliferation is regulated by many common signalling mechanisms. These mechanisms temporally balance proliferation and differentiation events during normal tissue homeostasis and repair. However, the effect of these aberrant signalling mechanisms on the ultimate fate of SCs and cancer cells remains obscure. METHODS To evaluate the functional effects of Secretory Phospholipase A2-IIA (sPLA2-IIA) induced abnormal signalling on normal SCs and cancer cells, we have used K14-sPLA2-IIA transgenic mice hair follicle stem cells (HFSCs), DMBA/TPA induced mouse skin tumour tissues, human oral squamous cell carcinoma (OSCC) and skin squamous cell carcinoma (SCC) derived cell lines. FINDINGS Our study demonstrates that sPLA2-IIA induces rapid proliferation of HFSCs, thereby altering the proliferation dynamics leading to a complete loss of the slow cycling H2BGFP positive HFSCs. Interestingly, in vivo reversion study by JNK inhibition exhibited a significant delay in post depilation hair growth, confirming that sPLA2-IIA promotes HFSCs proliferation through JNK/c-Jun signalling. In a different cellular context, we showed increased expression of sPLA2-IIA in human OSCC and mouse skin cancer tissues. Importantly, a xenograft of sPLA2-IIA knockdown cells of OSCC and SCC cell lines showed a concomitant reduction of tumour volume in NOD-SCID mice and decreased JNK/c-Jun signalling. INTERPRETATION This study unravels how an increased proliferation induced by a common proliferation inducer (sPLA2-IIA) alters the fate of normal SCs and cancer cells distinctively through common JNK/c-Jun signalling. Thus, sPLA2-IIA can be a potential target for various diseases including cancer. FUND: This work was partly supported by the Indian Council of Medical Research (ICMR-3097) and ACTREC (42) grants.
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Li KN, Jain P, He CH, Eun FC, Kang S, Tumbar T. Skin vasculature and hair follicle cross-talking associated with stem cell activation and tissue homeostasis. eLife 2019; 8:e45977. [PMID: 31343406 PMCID: PMC6684267 DOI: 10.7554/elife.45977] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 07/25/2019] [Indexed: 12/21/2022] Open
Abstract
Skin vasculature cross-talking with hair follicle stem cells (HFSCs) is poorly understood. Skin vasculature undergoes dramatic remodeling during adult mouse hair cycle. Specifically, a horizontal plexus under the secondary hair germ (HPuHG) transiently neighbors the HFSC activation zone during the quiescence phase (telogen). Increased density of HPuHG can be induced by reciprocal mutations in the epithelium (Runx1) and endothelium (Alk1) in adult mice, and is accompanied by prolonged HFSC quiescence and by delayed entry and progression into the hair growth phase (anagen). Suggestively, skin vasculature produces BMP4, a well-established HFSC quiescence-inducing factor, thus contributing to a proliferation-inhibitory environment near the HFSC. Conversely, the HFSC activator Runx1 regulates secreted proteins with previously demonstrated roles in vasculature remodeling. We suggest a working model in which coordinated remodeling and molecular cross-talking of the adult epithelial and endothelial skin compartments modulate timing of HFSC activation from quiescence for proper tissue homeostasis of adult skin.
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Affiliation(s)
- Kefei Nina Li
- Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Prachi Jain
- Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Catherine Hua He
- Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Flora Chae Eun
- Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Sangjo Kang
- Molecular Biology and GeneticsCornell UniversityIthacaUnited States
| | - Tudorita Tumbar
- Molecular Biology and GeneticsCornell UniversityIthacaUnited States
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37
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Panteleyev AA. Functional anatomy of the hair follicle: The Secondary Hair Germ. Exp Dermatol 2019; 27:701-720. [PMID: 29672929 DOI: 10.1111/exd.13666] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2018] [Indexed: 12/17/2022]
Abstract
The secondary hair germ (SHG)-a transitory structure in the lower portion of the mouse telogen hair follicle (HF)-is directly involved in anagen induction and eventual HF regrowth. Some crucial aspects of SHG functioning and ontogenetic relations with other HF parts, however, remain undefined. According to recent evidence (in contrast to previous bulge-centric views), the SHG is the primary target of anagen-inducing signalling and a source of both the outer root sheath (ORS) and ascending HF layers during the initial (morphogenetic) anagen subphase. The SHG is comprised of two functionally distinct cell populations. Its lower portion (originating from lower HF cells that survived catagen) forms all ascending HF layers, while the upper SHG (formed by bulge-derived cells) builds up the ORS. The predetermination of SHG cells to a specific morphogenetic fate contradicts their attribution to the "stem cell" category and supports SHG designation as a "germinative" or a "founder" cell population. The mechanisms of this predetermination driving transition of the SHG from "refractory" to the "competent" state during the telogen remain unknown. Functionally, the SHG serves as a barrier, protecting the quiescent bulge stem cell niche from the extensive follicular papilla/SHG signalling milieu. The formation of the SHG is a prerequisite for efficient "precommitment" of these cells and provides for easier sensing and a faster response to anagen-inducing signals. In general, the formation of the SHG is an evolutionary adaptation, which allowed the ancestors of modern Muridae to acquire a specific, highly synchronized pattern of hair cycling.
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Affiliation(s)
- Andrey A Panteleyev
- Kurchatov complex of NBICS Technologies, National Research Center "Kurchatov Institute", Moscow, Russia
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38
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Mohammad K, Dakik P, Medkour Y, Mitrofanova D, Titorenko VI. Quiescence Entry, Maintenance, and Exit in Adult Stem Cells. Int J Mol Sci 2019; 20:ijms20092158. [PMID: 31052375 PMCID: PMC6539837 DOI: 10.3390/ijms20092158] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/24/2019] [Accepted: 04/28/2019] [Indexed: 12/13/2022] Open
Abstract
Cells of unicellular and multicellular eukaryotes can respond to certain environmental cues by arresting the cell cycle and entering a reversible state of quiescence. Quiescent cells do not divide, but can re-enter the cell cycle and resume proliferation if exposed to some signals from the environment. Quiescent cells in mammals and humans include adult stem cells. These cells exhibit improved stress resistance and enhanced survival ability. In response to certain extrinsic signals, adult stem cells can self-renew by dividing asymmetrically. Such asymmetric divisions not only allow the maintenance of a population of quiescent cells, but also yield daughter progenitor cells. A multistep process of the controlled proliferation of these progenitor cells leads to the formation of one or more types of fully differentiated cells. An age-related decline in the ability of adult stem cells to balance quiescence maintenance and regulated proliferation has been implicated in many aging-associated diseases. In this review, we describe many traits shared by different types of quiescent adult stem cells. We discuss how these traits contribute to the quiescence, self-renewal, and proliferation of adult stem cells. We examine the cell-intrinsic mechanisms that allow establishing and sustaining the characteristic traits of adult stem cells, thereby regulating quiescence entry, maintenance, and exit.
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Affiliation(s)
- Karamat Mohammad
- Department of Biology, Concordia University, 7141 Sherbrooke Street, West, SP Building, Room 501-13, Montreal, QC H4B 1R6, Canada.
| | - Paméla Dakik
- Department of Biology, Concordia University, 7141 Sherbrooke Street, West, SP Building, Room 501-13, Montreal, QC H4B 1R6, Canada.
| | - Younes Medkour
- Department of Biology, Concordia University, 7141 Sherbrooke Street, West, SP Building, Room 501-13, Montreal, QC H4B 1R6, Canada.
| | - Darya Mitrofanova
- Department of Biology, Concordia University, 7141 Sherbrooke Street, West, SP Building, Room 501-13, Montreal, QC H4B 1R6, Canada.
| | - Vladimir I Titorenko
- Department of Biology, Concordia University, 7141 Sherbrooke Street, West, SP Building, Room 501-13, Montreal, QC H4B 1R6, Canada.
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39
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Kang S, Chovatiya G, Tumbar T. Epigenetic control in skin development, homeostasis and injury repair. Exp Dermatol 2019; 28:453-463. [PMID: 30624812 PMCID: PMC6488370 DOI: 10.1111/exd.13872] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/11/2018] [Accepted: 01/05/2019] [Indexed: 12/14/2022]
Abstract
Cell-type- and cell-state-specific patterns of covalent modifications on DNA and histone tails form global epigenetic profiles that enable spatiotemporal regulation of gene expression. These epigenetic profiles arise from coordinated activities of transcription factors and epigenetic modifiers, which result in cell-type-specific outputs in response to dynamic environmental conditions and signalling pathways. Recent mouse genetic and functional studies have highlighted the physiological significance of global DNA and histone epigenetic modifications in skin. Importantly, specific epigenetic profiles are emerging for adult skin stem cells that are associated with their cell fate plasticity and proper activity in tissue regeneration. We can now begin to draw a more comprehensive picture of how epigenetic modifiers orchestrate their cell-intrinsic role with microenvironmental cues for proper skin development, homeostasis and wound repair. The field is ripe to begin to implement these findings from the laboratory into skin therapies.
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Affiliation(s)
- Sangjo Kang
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York
| | - Gopal Chovatiya
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York
| | - Tudorita Tumbar
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York
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40
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Huang W, Lin ET, Hsu Y, Lin S. Anagen hair follicle repair: Timely regenerative attempts from plastic extra‐bulge epithelial cells. Exp Dermatol 2019; 28:406-412. [DOI: 10.1111/exd.13889] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/26/2018] [Accepted: 01/15/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Wen‐Yen Huang
- Department of Biomedical EngineeringNational Taiwan University Taipei Taiwan
| | - Edrick Tai‐Yu Lin
- Department of Biomedical EngineeringNational Taiwan University Taipei Taiwan
- Department of DermatologyNational Taiwan University Hospital and National Taiwan University College of Medicine Taipei Taiwan
| | - Ya‐Chieh Hsu
- Department of Stem Cell and Regenerative BiologyHarvard University and Harvard Stem Cell Institute Cambridge Massachusetts
| | - Sung‐Jan Lin
- Department of Biomedical EngineeringNational Taiwan University Taipei Taiwan
- Department of DermatologyNational Taiwan University Hospital and National Taiwan University College of Medicine Taipei Taiwan
- Research Center for Developmental Biology and Regenerative MedicineNational Taiwan University Taipei Taiwan
- Graduate Institute of Clinical MedicineCollege of MedicineNational Taiwan University Taipei Taiwan
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41
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Brunner MAT, Rüfenacht S, Bauer A, Erpel S, Buchs N, Braga-Lagache S, Heller M, Leeb T, Jagannathan V, Wiener DJ, Welle MM. Bald thigh syndrome in sighthounds-Revisiting the cause of a well-known disease. PLoS One 2019; 14:e0212645. [PMID: 30794648 PMCID: PMC6386255 DOI: 10.1371/journal.pone.0212645] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 02/06/2019] [Indexed: 01/17/2023] Open
Abstract
Bald thigh syndrome is a common hair loss disorder in sighthounds. Numerous possible causes, including environmental conditions, trauma, stress, endocrinopathies and genetic components have been proposed, but only endocrinopathies have been ruled out scientifically. The overall goal of our study was to identify the cause of bald thigh syndrome and the pathological changes associated with it. We approached this aim by comparing skin biopsies and hair shafts of affected and control dogs microscopically as well as by applying high-throughput technologies such as genomics, transcriptomics and proteomics. While the histology is rather unspecific in most cases, trichogram analysis and scanning electron microscopy revealed severe structural abnormalities in hair shafts of affected dogs. This finding is supported by the results of the transcriptomic and proteomic profiling where genes and proteins important for differentiation of the inner root sheath and the assembly of a proper hair shaft were downregulated. Transcriptome profiling revealed a downregulation of genes encoding 23 hair shaft keratins and 51 keratin associated proteins, as well as desmosomal cadherins and several actors of the BMP signaling pathway which is important for hair shaft differentiation. The lower expression of keratin 71 and desmocollin 2 on the mRNA level in skin biopsies corresponded with a decreased protein expression in the hair shafts of affected dogs. The genetic analysis revealed a missense variant in the IGFBP5 gene homozygous in all available Greyhounds and other sighthounds. Further research is required to clarify whether the IGFBP5 variant represents a predisposing genetic risk factor. We conclude from our results that structural defects in the hair shafts are the cause for this well-known disease and these defects are associated with a downregulation of genes and proteins essential for hair shaft formation. Our data add important knowledge to further understand the molecular mechanisms of HF morphogenesis and alopecia in dogs.
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Affiliation(s)
- Magdalena A. T. Brunner
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- DermFocus, University of Bern, Bern, Switzerland
| | | | - Anina Bauer
- DermFocus, University of Bern, Bern, Switzerland
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Susanne Erpel
- Nano Imaging Lab, SNI, University of Basel, Basel, Switzerland
| | - Natasha Buchs
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Sophie Braga-Lagache
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Manfred Heller
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Tosso Leeb
- DermFocus, University of Bern, Bern, Switzerland
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Vidhya Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Dominique J. Wiener
- Department of Veterinary Pathobiology, Texas A&M University, College Station, United States of America
| | - Monika M. Welle
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- DermFocus, University of Bern, Bern, Switzerland
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42
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Sasaki GH. Review of Human Hair Follicle Biology: Dynamics of Niches and Stem Cell Regulation for Possible Therapeutic Hair Stimulation for Plastic Surgeons. Aesthetic Plast Surg 2019; 43:253-266. [PMID: 30324295 DOI: 10.1007/s00266-018-1248-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 09/19/2018] [Indexed: 12/13/2022]
Abstract
Plastic surgeons are frequently asked to manage male- and female-pattern hair loss in their practice. This article discusses the epidemiology, pathophysiology, and current management of androgenetic alopecia and emphasizes more recent knowledge of stem cell niches in hair follicles that drive hair cycling, alopecia, and its treatment. The many treatment programs available for hair loss include newer strategies that involve the usage of growth factors, platelet-rich plasma, and fat to stimulate follicle growth. Future research may clarify novel biomolecular mechanisms that target specific cells that promote hair regeneration.Level of Evidence V This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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43
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Haensel D, Sun P, MacLean AL, Ma X, Zhou Y, Stemmler MP, Brabletz S, Berx G, Plikus MV, Nie Q, Brabletz T, Dai X. An Ovol2-Zeb1 transcriptional circuit regulates epithelial directional migration and proliferation. EMBO Rep 2018; 20:embr.201846273. [PMID: 30413481 DOI: 10.15252/embr.201846273] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Revised: 10/08/2018] [Accepted: 10/12/2018] [Indexed: 01/06/2023] Open
Abstract
Directional migration is inherently important for epithelial tissue regeneration and repair, but how it is precisely controlled and coordinated with cell proliferation is unclear. Here, we report that Ovol2, a transcriptional repressor that inhibits epithelial-to-mesenchymal transition (EMT), plays a crucial role in adult skin epithelial regeneration and repair. Ovol2-deficient mice show compromised wound healing characterized by aberrant epidermal cell migration and proliferation, as well as delayed anagen progression characterized by defects in hair follicle matrix cell proliferation and subsequent differentiation. Epidermal keratinocytes and bulge hair follicle stem cells (Bu-HFSCs) lacking Ovol2 fail to expand in culture and display molecular alterations consistent with enhanced EMT and reduced proliferation. Live imaging of wound explants and Bu-HFSCs reveals increased migration speed but reduced directionality, and post-mitotic cell cycle arrest. Remarkably, simultaneous deletion of Zeb1 encoding an EMT-promoting factor restores directional migration to Ovol2-deficient Bu-HFSCs. Taken together, our findings highlight the important function of an Ovol2-Zeb1 EMT-regulatory circuit in controlling the directional migration of epithelial stem and progenitor cells to facilitate adult skin epithelial regeneration and repair.
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Affiliation(s)
- Daniel Haensel
- Department of Biological Chemistry, School of Medicine, University of California, Irvine, CA, USA
| | - Peng Sun
- Department of Biological Chemistry, School of Medicine, University of California, Irvine, CA, USA
| | - Adam L MacLean
- Department of Mathematics, University of California, Irvine, CA, USA
| | - Xianghui Ma
- Department of Biological Chemistry, School of Medicine, University of California, Irvine, CA, USA
| | - Yuan Zhou
- Department of Biological Chemistry, School of Medicine, University of California, Irvine, CA, USA
| | - Marc P Stemmler
- Department of Experimental Medicine, Nikolaus-Fiebiger-Center for Molecular Medicine, Friedrich-Alexander University Erlangen-Nuernberg, Erlangen, Germany
| | - Simone Brabletz
- Department of Experimental Medicine, Nikolaus-Fiebiger-Center for Molecular Medicine, Friedrich-Alexander University Erlangen-Nuernberg, Erlangen, Germany
| | - Geert Berx
- Molecular and Cellular Oncology Lab, Department of Biomedical Molecular Biology, Ghent University, Zwijnaarde, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Maksim V Plikus
- Department of Developmental and Cell Biology, University of California, Irvine, CA, USA
| | - Qing Nie
- Department of Mathematics, University of California, Irvine, CA, USA.,Department of Developmental and Cell Biology, University of California, Irvine, CA, USA
| | - Thomas Brabletz
- Department of Experimental Medicine, Nikolaus-Fiebiger-Center for Molecular Medicine, Friedrich-Alexander University Erlangen-Nuernberg, Erlangen, Germany
| | - Xing Dai
- Department of Biological Chemistry, School of Medicine, University of California, Irvine, CA, USA
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44
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The Mesenchymal Niche of the Hair Follicle Induces Regeneration by Releasing Primed Progenitors from Inhibitory Effects of Quiescent Stem Cells. Cell Rep 2018; 24:909-921.e3. [DOI: 10.1016/j.celrep.2018.06.084] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 03/22/2018] [Accepted: 06/20/2018] [Indexed: 01/09/2023] Open
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45
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So WK, Cheung TH. Molecular Regulation of Cellular Quiescence: A Perspective from Adult Stem Cells and Its Niches. Methods Mol Biol 2018; 1686:1-25. [PMID: 29030809 DOI: 10.1007/978-1-4939-7371-2_1] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cellular quiescence is a reversible growth arrest state. In response to extracellular environment, quiescent cells are capable of resuming proliferation for tissue homeostasis and tissue regeneration. Subpopulations of adult stem cells remain quiescent and reside in their specialized stem cell niches. Within the niche, they interact with a repertoire of niche components. Niche integrates signals to maintain quiescence or gear stem cells toward regeneration. Recent studies provide insights into the regulatory components of stem cell niche and their influence on residing stem cells. Aberrant niche activities perturb stem cell quiescence and activation, compromise stem cell functions, and contribute to tissue aging and disease pathogenesis. This review covers current knowledge regarding cellular quiescence with a focus on original and emerging concepts of how niches influence stem cell quiescence.
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Affiliation(s)
- Wai-Kin So
- Division of Life Science, Center for Stem Cell Research, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Institute for Advanced Study, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Tom H Cheung
- Division of Life Science, Center for Stem Cell Research, State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, Institute for Advanced Study, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
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46
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Comparative regenerative mechanisms across different mammalian tissues. NPJ Regen Med 2018; 3:6. [PMID: 29507774 PMCID: PMC5824955 DOI: 10.1038/s41536-018-0044-5] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 01/18/2018] [Accepted: 01/23/2018] [Indexed: 02/08/2023] Open
Abstract
Stimulating regeneration of complex tissues and organs after injury to effect complete structural and functional repair, is an attractive therapeutic option that would revolutionize clinical medicine. Compared to many metazoan phyla that show extraordinary regenerative capacity, which in some instances persists throughout life, regeneration in mammalians, particularly humans, is limited or absent. Here we consider recent insights in the elucidation of molecular mechanisms of regeneration that have come from studies of tissue homeostasis and injury repair in mammalian tissues that span the spectrum from little or no self-renewal, to those showing active cell turnover throughout life. These studies highlight the diversity of factors that constrain regeneration, including immune responses, extracellular matrix composition, age, injury type, physiological adaptation, and angiogenic and neurogenic capacity. Despite these constraints, much progress has been made in elucidating key molecular mechanisms that may provide therapeutic targets for the development of future regenerative therapies, as well as previously unidentified developmental paradigms and windows-of-opportunity for improved regenerative repair.
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47
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Zhang H, Zhao H, Qiao J, Zhang S, Liu S, Li N, Lei X, Ning L, Cao Y, Duan E. Expansion of Hair Follicle Stem Cells Sticking to Isolated Sebaceous Glands to Generate in Vivo Epidermal Structures. Cell Transplant 2018; 25:2071-2082. [PMID: 27302156 DOI: 10.3727/096368916x691989] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Hair follicle stem cells (HFSCs) are considered one of the useful donor cell types for skin regenerative medicine owing to their robust proliferative capacity and multipotency. However, methods for easily and effectively obtaining HFSCs from a limited skin biopsy are still lacking. Here we report a novel approach for obtaining a subpopulation of HFSCs from a small skin sample from the rat tail, which uses the sebaceous glands (SGs) to capture the adjacent HFSCs. By means of organ culture, keratinocytes were expanded from the detached SGs, which also included adherent HFSCs from the hair follicle that could be passaged at the single-cell level. These SG-captured keratinocytes strongly expressed the basal layer markers K14, integrin α6, and p63; the bulge stem cell marker K15; and the upper isthmus stem cell marker Plet1. Furthermore, we reconstituted new epidermis, hair follicles, and SGs from the SG-captured keratinocytes using an easily operated, modified skin reconstitution assay based on silicone gel sheeting. This study suggests that the SGs could be an accessible capturer to harvest the adjacent HFSC subpopulation, particularly when the donor tissue is limited.
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Affiliation(s)
- Huishan Zhang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China
| | - Huashan Zhao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China
| | - Jingqiao Qiao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China
| | - Shoubing Zhang
- Department of Histology and Embryology, School of Basic Medical Sciences, Anhui Medical University, Hefei, P.R. China
| | - Shuang Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China
| | - Na Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China.,University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Xiaohua Lei
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China
| | - Lina Ning
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China
| | - Yujing Cao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China
| | - Enkui Duan
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, P.R. China
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Mesler AL, Veniaminova NA, Lull MV, Wong SY. Hair Follicle Terminal Differentiation Is Orchestrated by Distinct Early and Late Matrix Progenitors. Cell Rep 2018; 19:809-821. [PMID: 28445731 DOI: 10.1016/j.celrep.2017.03.077] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 02/28/2017] [Accepted: 03/27/2017] [Indexed: 11/25/2022] Open
Abstract
During development and regeneration, matrix progenitors undergo terminal differentiation to form the concentric layers of the hair follicle. These differentiation events are thought to require signals from the mesenchymal dermal papilla (DP); however, it remains unclear how DP-progenitor cell interactions govern specific cell fate decisions. Here, we show that the hair follicle differentiated layers are specified asynchronously, with early matrix progenitors initiating differentiation before surrounding the DP. Furthermore, these early matrix cells can undergo terminal differentiation in the absence of Shh, BMP signaling, and DP maturation. Whereas early matrix progenitors form the hair follicle companion layer, later matrix populations progressively form the inner root sheath and hair shaft. Altogether, our findings characterize some of the earliest terminal differentiation events in the hair follicle and reveal that the matrix progenitor pool can be divided into early and late phases based on distinct temporal, molecular, and functional characteristics.
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Affiliation(s)
- Arlee L Mesler
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Natalia A Veniaminova
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Madison V Lull
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Sunny Y Wong
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA.
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49
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Ghahramani A, Donati G, Luscombe NM, Watt FM. Epidermal Wnt signalling regulates transcriptome heterogeneity and proliferative fate in neighbouring cells. Genome Biol 2018; 19:3. [PMID: 29334988 PMCID: PMC5769491 DOI: 10.1186/s13059-017-1384-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 12/22/2017] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Canonical Wnt/beta-catenin signalling regulates self-renewal and lineage selection within the mammalian epidermis. Although the transcriptional response of keratinocytes that receive a Wnt signal is well characterized, little is known about the mechanism by which keratinocytes in proximity to the Wnt-receiving cell are co-opted to undergo a change in cell fate. RESULTS To address this, we perform single-cell RNA-sequencing on mouse keratinocytes co-cultured with and without beta-catenin-activated neighbouring cells. We identify five distinct cell states in cultures that had not been exposed to the beta-catenin stimulus and show that the stimulus redistributes wild-type subpopulation proportions. Using temporal single-cell analysis, we reconstruct the cell fate change induced by Wnt activation from neighbouring cells. Gene expression heterogeneity is reduced in neighbouring cells and this effect is most dramatic for protein synthesis-associated genes. Changes in gene expression are accompanied by a shift to a more proliferative stem cell state. By integrating imaging and reconstructed sequential gene expression changes during the state transition we identify transcription factors, including Smad4 and Bcl3, that are responsible for effecting the transition in a contact-dependent manner. CONCLUSIONS Our data indicate that non-cell autonomous Wnt/beta-catenin signalling decreases transcriptional heterogeneity. This furthers our understanding of how epidermal Wnt signalling orchestrates regeneration and self-renewal.
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Affiliation(s)
- Arsham Ghahramani
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
- King's College London, Centre for Stem Cells and Regenerative Medicine, 28th Floor, Tower Wing, Guy's Hospital, Great Maze Pond, London, SE1 9RT, UK
| | - Giacomo Donati
- King's College London, Centre for Stem Cells and Regenerative Medicine, 28th Floor, Tower Wing, Guy's Hospital, Great Maze Pond, London, SE1 9RT, UK
- Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123, Torino, Italy
| | - Nicholas M Luscombe
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.
- UCL Genetics Institute, University College London, London, WC1E 6BT, UK.
- Okinawa Institute of Science & Technology Graduate University, Okinawa, 904-0495, Japan.
| | - Fiona M Watt
- King's College London, Centre for Stem Cells and Regenerative Medicine, 28th Floor, Tower Wing, Guy's Hospital, Great Maze Pond, London, SE1 9RT, UK.
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Kahata K, Dadras MS, Moustakas A. TGF-β Family Signaling in Epithelial Differentiation and Epithelial-Mesenchymal Transition. Cold Spring Harb Perspect Biol 2018; 10:cshperspect.a022194. [PMID: 28246184 DOI: 10.1101/cshperspect.a022194] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Epithelia exist in the animal body since the onset of embryonic development; they generate tissue barriers and specify organs and glands. Through epithelial-mesenchymal transitions (EMTs), epithelia generate mesenchymal cells that form new tissues and promote healing or disease manifestation when epithelial homeostasis is challenged physiologically or pathologically. Transforming growth factor-βs (TGF-βs), activins, bone morphogenetic proteins (BMPs), and growth and differentiation factors (GDFs) have been implicated in the regulation of epithelial differentiation. These TGF-β family ligands are expressed and secreted at sites where the epithelium interacts with the mesenchyme and provide paracrine queues from the mesenchyme to the neighboring epithelium, helping the specification of differentiated epithelial cell types within an organ. TGF-β ligands signal via Smads and cooperating kinase pathways and control the expression or activities of key transcription factors that promote either epithelial differentiation or mesenchymal transitions. In this review, we discuss evidence that illustrates how TGF-β family ligands contribute to epithelial differentiation and induce mesenchymal transitions, by focusing on the embryonic ectoderm and tissues that form the external mammalian body lining.
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Affiliation(s)
- Kaoru Kahata
- Ludwig Institute for Cancer Research, Science for Life Laboratory, Uppsala University, SE-751 24 Uppsala, Sweden
| | - Mahsa Shahidi Dadras
- Ludwig Institute for Cancer Research, Science for Life Laboratory, Uppsala University, SE-751 24 Uppsala, Sweden.,Department of Medical Biochemistry and Microbiology, Science for Life Laboratory, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Aristidis Moustakas
- Ludwig Institute for Cancer Research, Science for Life Laboratory, Uppsala University, SE-751 24 Uppsala, Sweden.,Department of Medical Biochemistry and Microbiology, Science for Life Laboratory, Uppsala University, SE-751 23 Uppsala, Sweden
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