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Khatif H, Bazzi H. Generation and characterization of a Dkk4-Cre knock-in mouse line. Genesis 2024; 62:e23532. [PMID: 37435631 DOI: 10.1002/dvg.23532] [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: 12/22/2022] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 07/13/2023]
Abstract
Ectodermal appendages in mammals, such as teeth, mammary glands, sweat glands and hair follicles, are generated during embryogenesis through a series of mesenchymal-epithelial interactions. Canonical Wnt signaling and its inhibitors are implicated in the early steps of ectodermal appendage development and patterning. To study the activation dynamics of the Wnt target and inhibitor Dickkopf4 (Dkk4) in ectodermal appendages, we used CRSIPR/Cas9 to generate a Dkk4-Cre knock-in mouse (Mus musculus) line, where the Cre recombinase cDNA replaces the expression of endogenous Dkk4. Using Cre reporters, the Dkk4-Cre activity was evident at the prospective sites of ectodermal appendages, overlapping with the Dkk4 mRNA expression. Unexpectedly, a predominantly mesenchymal cell population in the embryo posterior also showed Dkk4-Cre activity. Lineage-tracing suggested that these cells are likely derived from a few Dkk4-Cre-expressing cells in the epiblast at early gastrulation. Finally, our analyses of Dkk4-Cre-expressing cells in developing hair follicle epithelial placodes revealed intra- and inter-placodal cellular heterogeneity, supporting emerging data on the positional and transcriptional cellular variability in placodes. Collectively, we propose the new Dkk4-Cre knock-in mouse line as a suitable model to study Wnt and DKK4 inhibitor dynamics in early mouse development and ectodermal appendage morphogenesis.
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Affiliation(s)
- Houda Khatif
- Department of Dermatology and Venereology, University Hospital of Cologne, University of Cologne, Cologne, Germany
- The Cologne Cluster of Excellence in Cellular Stress Responses in Aging-associated Diseases (CECAD), Medical Faculty, University of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne, Cologne, Germany
| | - Hisham Bazzi
- Department of Dermatology and Venereology, University Hospital of Cologne, University of Cologne, Cologne, Germany
- The Cologne Cluster of Excellence in Cellular Stress Responses in Aging-associated Diseases (CECAD), Medical Faculty, University of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne, Cologne, Germany
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2
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Dingwall HL, Tomizawa RR, Aharoni A, Hu P, Qiu Q, Kokalari B, Martinez SM, Donahue JC, Aldea D, Mendoza M, Glass IA, Wu H, Kamberov YG. Sweat gland development requires an eccrine dermal niche and couples two epidermal programs. Dev Cell 2024; 59:20-32.e6. [PMID: 38096824 PMCID: PMC10872420 DOI: 10.1016/j.devcel.2023.11.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 10/02/2023] [Accepted: 11/14/2023] [Indexed: 12/22/2023]
Abstract
Eccrine sweat glands are indispensable for human thermoregulation and, similar to other mammalian skin appendages, form from multipotent epidermal progenitors. Limited understanding of how epidermal progenitors specialize to form these vital organs has precluded therapeutic efforts toward their regeneration. Herein, we applied single-nucleus transcriptomics to compare the expression content of wild-type, eccrine-forming mouse skin to that of mice harboring a skin-specific disruption of Engrailed 1 (En1), a transcription factor that promotes eccrine gland formation in humans and mice. We identify two concurrent but disproportionate epidermal transcriptomes in the early eccrine anlagen: one that is shared with hair follicles and one that is En1 dependent and eccrine specific. We demonstrate that eccrine development requires the induction of a dermal niche proximal to each developing gland in humans and mice. Our study defines the signatures of eccrine identity and uncovers the eccrine dermal niche, setting the stage for targeted regeneration and comprehensive skin repair.
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Affiliation(s)
- Heather L Dingwall
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Reiko R Tomizawa
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Adam Aharoni
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Peng Hu
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Qi Qiu
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Blerina Kokalari
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | | | - Joan C Donahue
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Daniel Aldea
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Meryl Mendoza
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Ian A Glass
- Department of Pediatrics, University of Washington, Seattle, WA, USA
| | - Hao Wu
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Yana G Kamberov
- Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA.
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3
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Yang X, Xiong M, Fu X, Sun X. Bioactive materials for in vivo sweat gland regeneration. Bioact Mater 2024; 31:247-271. [PMID: 37637080 PMCID: PMC10457517 DOI: 10.1016/j.bioactmat.2023.07.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 07/30/2023] [Accepted: 07/30/2023] [Indexed: 08/29/2023] Open
Abstract
Loss of sweat glands (SwGs) commonly associated with extensive skin defects is a leading cause of hyperthermia and heat stroke. In vivo tissue engineering possesses the potential to take use of the body natural ability to regenerate SwGs, making it more conducive to clinical translation. Despite recent advances in regenerative medicine, reconstructing SwG tissue with the same structure and function as native tissue remains challenging. Elucidating the SwG generation mechanism and developing biomaterials for in vivo tissue engineering is essential for understanding and developing in vivo SwG regenerative strategies. Here, we outline the cell biology associated with functional wound healing and the characteristics of bioactive materials. We critically summarize the recent progress in bioactive material-based cell modulation approaches for in vivo SwG regeneration, including the recruitment of endogenous cells to the skin lesion for SwG regeneration and in vivo cellular reprogramming for SwG regeneration. We discussed the re-establishment of microenvironment via bioactive material-mediated regulators. Besides, we offer promising perspectives for directing in situ SwG regeneration via bioactive material-based cell-free strategy, which is a simple and effective approach to regenerate SwG tissue with both fidelity of structure and function. Finally, we discuss the opportunities and challenges of in vivo SwG regeneration in detail. The molecular mechanisms and cell fate modulation of in vivo SwG regeneration will provide further insights into the regeneration of patient-specific SwGs and the development of potential intervention strategies for gland-derived diseases.
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Affiliation(s)
- Xinling Yang
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, PR China
| | - Mingchen Xiong
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, PR China
| | - Xiaobing Fu
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, PR China
| | - Xiaoyan Sun
- Research Center for Tissue Repair and Regeneration Affiliated to Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, PR China
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4
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Bai R, Guo Y, Liu W, Song Y, Yu Z, Ma X. The Roles of WNT Signaling Pathways in Skin Development and Mechanical-Stretch-Induced Skin Regeneration. Biomolecules 2023; 13:1702. [PMID: 38136575 PMCID: PMC10741662 DOI: 10.3390/biom13121702] [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: 10/16/2023] [Revised: 11/10/2023] [Accepted: 11/14/2023] [Indexed: 12/24/2023] Open
Abstract
The WNT signaling pathway plays a critical role in a variety of biological processes, including development, adult tissue homeostasis maintenance, and stem cell regulation. Variations in skin conditions can influence the expression of the WNT signaling pathway. In light of the above, a deeper understanding of the specific mechanisms of the WNT signaling pathway in different physiological and pathological states of the skin holds the potential to significantly advance clinical treatments of skin-related diseases. In this review, we present a comprehensive analysis of the molecular and cellular mechanisms of the WNT signaling pathway in skin development, wound healing, and mechanical stretching. Our review sheds new light on the crucial role of the WNT signaling pathway in the regulation of skin physiology and pathology.
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Affiliation(s)
- Ruoxue Bai
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
| | - Yaotao Guo
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
- Department of The Cadet Team 6, School of Basic Medicine, Fourth Military Medical University, Xi’an 710032, China
| | - Wei Liu
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
| | - Yajuan Song
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
| | - Zhou Yu
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
| | - Xianjie Ma
- Department of Plastic Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
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5
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Wark AR, Aldea D, Tomizawa RR, Kokalari B, Warder B, Kamberov YG. Ectodysplasin Signaling through XEDAR Is Required for Mammary Gland Morphogenesis. J Invest Dermatol 2023; 143:1529-1537.e2. [PMID: 36804570 PMCID: PMC10363239 DOI: 10.1016/j.jid.2023.02.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 01/04/2023] [Accepted: 02/02/2023] [Indexed: 02/21/2023]
Abstract
XEDAR is a member of the TNF receptor subfamily and a mediator of the ectodysplasin (EDA) pathway. EDA signaling plays evolutionarily conserved roles in the development of the ectodermal appendage organ class, which includes hair, eccrine sweat glands, and mammary glands. Loss-of-function sequence variants of EDA, which encodes the two major ligand isoforms, EDA-A1 and EDA-A2, result in X-linked hypohidrotic ectodermal dysplasia characterized by defects in two or more types of ectodermal appendages. EDA-A1 and EDA-A2 signal through the receptors EDAR and XEDAR, respectively. Although the contributions of the EDA-A1/EDAR signaling pathway to EDA-dependent ectodermal appendage phenotypes have been extensively characterized, the significance of the EDA-A2/XEDAR branch of the pathway has remained obscure. In this study, we report the phenotypic consequences of disrupting the EDA-A2/XEDAR pathway on mammary gland differentiation and growth. Using a mouse Xedar knockout model, we show that Xedar has a specific and temporally restricted role in promoting late pubertal growth and branching of the mammary epithelium that can be influenced by genetic background. Our findings implicate Xedar in ectodermal appendage development and suggest that the EDA-A2/XEDAR signaling axis contributes to the etiology of EDA-dependent mammary phenotypes.
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Affiliation(s)
- Abigail R Wark
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
| | - Daniel Aldea
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Reiko R Tomizawa
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA
| | - Blerina Kokalari
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Bailey Warder
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Yana G Kamberov
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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6
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Aldea D, Kokalari B, Atsuta Y, Dingwall HL, Zheng Y, Nace A, Cotsarelis G, Kamberov YG. Differential modularity of the mammalian Engrailed 1 enhancer network directs sweat gland development. PLoS Genet 2023; 19:e1010614. [PMID: 36745673 PMCID: PMC9934363 DOI: 10.1371/journal.pgen.1010614] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 02/16/2023] [Accepted: 01/13/2023] [Indexed: 02/07/2023] Open
Abstract
Enhancers are context-specific regulators of expression that drive biological complexity and variation through the redeployment of conserved genes. An example of this is the enhancer-mediated control of Engrailed 1 (EN1), a pleiotropic gene whose expression is required for the formation of mammalian eccrine sweat glands. We previously identified the En1 candidate enhancer (ECE) 18 cis-regulatory element that has been highly and repeatedly derived on the human lineage to potentiate ectodermal EN1 and induce our species' uniquely high eccrine gland density. Intriguingly, ECE18 quantitative activity is negligible outside of primates and ECE18 is not required for En1 regulation and eccrine gland formation in mice, raising the possibility that distinct enhancers have evolved to modulate the same trait. Here we report the identification of the ECE20 enhancer and show it has conserved functionality in mouse and human developing skin ectoderm. Unlike ECE18, knock-out of ECE20 in mice reduces ectodermal En1 and eccrine gland number. Notably, we find ECE20, but not ECE18, is also required for En1 expression in the embryonic mouse brain, demonstrating that ECE20 is a pleiotropic En1 enhancer. Finally, that ECE18 deletion does not potentiate the eccrine phenotype of ECE20 knock-out mice supports the secondary incorporation of ECE18 into the regulation of this trait in primates. Our findings reveal that the mammalian En1 regulatory machinery diversified to incorporate both shared and lineage-restricted enhancers to regulate the same phenotype, and also have implications for understanding the forces that shape the robustness and evolvability of developmental traits.
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Affiliation(s)
- Daniel Aldea
- Department of Genetics, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Blerina Kokalari
- Department of Genetics, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Yuji Atsuta
- Genetics Department, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Heather L. Dingwall
- Department of Genetics, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Ying Zheng
- Department of Dermatology, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Arben Nace
- Department of Dermatology, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - George Cotsarelis
- Department of Dermatology, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Yana G. Kamberov
- Department of Genetics, Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
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7
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Horakova L, Dalecka L, Zahradnicek O, Lochovska K, Lesot H, Peterkova R, Tucker AS, Hovorakova M. Eda controls the size of the enamel knot during incisor development. Front Physiol 2023; 13:1033130. [PMID: 36699680 PMCID: PMC9868551 DOI: 10.3389/fphys.2022.1033130] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 12/14/2022] [Indexed: 01/11/2023] Open
Abstract
Ectodysplasin (Eda) plays important roles in both shaping the developing tooth and establishing the number of teeth within the tooth row. Sonic hedgehog (Shh) has been shown to act downstream of Eda and is involved in the initiation of tooth development. Eda-/- mice possess hypoplastic and hypomineralized incisors and show changes in tooth number in the molar region. In the present study we used 3D reconstruction combined with expression analysis, cell lineage tracing experiments, and western blot analysis in order to investigate the formation of the incisor germs in Eda-/- mice. We show that a lack of functional Eda protein during early stages of incisor tooth germ development had minimal impact on development of the early expression of Shh in the incisor, a region proposed to mark formation of a rudimental incisor placode and act as an initiating signalling centre. In contrast, deficiency of Eda protein had a later impact on expression of Shh in the primary enamel knot of the functional tooth. Eda-/- mice had a smaller region where Shh was expressed, and a reduced contribution from Shh descendant cells. The reduction in the enamel knot led to the formation of an abnormal enamel organ creating a hypoplastic functional incisor. Eda therefore appears to influence the spatial formation of the successional signalling centres during odontogenesis.
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Affiliation(s)
- Lucie Horakova
- Institute of Histology and Embryology, 1st Faculty of Medicine, Charles University, Prague, Czechia,Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
| | - Linda Dalecka
- Institute of Histology and Embryology, 1st Faculty of Medicine, Charles University, Prague, Czechia,Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
| | - Oldrich Zahradnicek
- Department of Radiation Dosimetry, Nuclear Physics Institute, Czech Academy of Sciences, Prague, Czechia
| | - Katerina Lochovska
- First Department of Medicine—Department of Hematology First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czechia
| | - Herve Lesot
- Laboratory of Odontogenesis and Osteogenesis, Institute of Animal Physiology and Genetics, Academy of Sciences, Brno, Czechia
| | - Renata Peterkova
- Department of Histology and Embryology, 3rd Faculty of Medicine, Charles University, Prague, Czechia
| | - Abigail S. Tucker
- Institute of Histology and Embryology, 1st Faculty of Medicine, Charles University, Prague, Czechia,Department of Craniofacial and Regenerative Biology, King´s College London, Guys Hospital, London, United Kingdom
| | - Maria Hovorakova
- Institute of Histology and Embryology, 1st Faculty of Medicine, Charles University, Prague, Czechia,*Correspondence: Maria Hovorakova,
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8
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Luo H, Wang Z, Qi F, Wang D. Applications of human amniotic fluid stem cells in wound healing. Chin Med J (Engl) 2022; 135:2272-2281. [PMID: 36535008 PMCID: PMC9771343 DOI: 10.1097/cm9.0000000000002076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Indexed: 12/23/2022] Open
Abstract
ABSTRACT Complete wound regeneration preserves skin structure and physiological functions, including sensation and perception of stimuli, whereas incomplete wound regeneration results in fibrosis and scarring. Amniotic fluid stem cells (AFSCs) would be a kind of cell population with self-renewing and non-immunogenic ability that have a considerable role in wound generation. They are easy to harvest, culture, and store; moreover, they are non-tumorigenic and not subject to ethical restrictions. They can differentiate into different kinds of cells that replenish the skin, subcutaneous tissues, and accessory organs. Additionally, AFSCs independently produce paracrine effectors and secrete them in exosomes, thereby modulating local immune cell activity. They demonstrate anti-inflammatory and immunomodulatory properties, regulate the physicochemical microenvironment of the wound, and promote full wound regeneration. Thus, AFSCs are potential resources in stem cell therapy, especially in scar-free wound healing. This review describes the biological characteristics and clinical applications of AFSCs in treating wounds and provide new ideas for the treatment of wound healing.
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Affiliation(s)
- Han Luo
- Department of Plastic Surgery and Burns, The Affiliated Hospital of Zunyl Medical University, Zunyl, Guizhou 563003, China
- Department of Plastic Surgery and Burns, Fuling Central Hospital, Chongqing 408000, China
| | - Zhen Wang
- Department of Plastic Surgery and Burns, The Affiliated Hospital of Zunyl Medical University, Zunyl, Guizhou 563003, China
| | - Fang Qi
- Department of Plastic Surgery and Burns, The Affiliated Hospital of Zunyl Medical University, Zunyl, Guizhou 563003, China
| | - Dali Wang
- Department of Plastic Surgery and Burns, The Affiliated Hospital of Zunyl Medical University, Zunyl, Guizhou 563003, China
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Schneider H. Ectodermal dysplasias: New perspectives on the treatment of so far immedicable genetic disorders. Front Genet 2022; 13:1000744. [PMID: 36147498 PMCID: PMC9485875 DOI: 10.3389/fgene.2022.1000744] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 08/04/2022] [Indexed: 11/13/2022] Open
Abstract
The past decade has witnessed an expansion of molecular approaches facilitating the differential diagnosis of ectodermal dysplasias, a group of genetic diseases characterized by the lack or malformation of hair, teeth, nails, and certain eccrine glands. Moreover, advances in translational research have increased the therapeutic opportunities for such rare diseases, and new dental, surgical, and ophthalmic treatment options are likely to offer relief to many individuals affected by ectodermal dysplasias. In X-linked hypohidrotic ectodermal dysplasia (XLHED), the genetic deficiency of the signaling molecule ectodysplasin A1 (EDA1) may even be overcome before birth by administration of a recombinant replacement protein. This has been shown at least for the key problem of male subjects with XLHED, the nearly complete absence of sweat glands and perspiration which can lead to life-threatening hyperthermia. Prenatal treatment of six boys by injection of an EDA1 replacement protein into the amniotic fluid consistently induced the development of functional sweat glands. Normal ability to sweat has so far persisted for >5 years in the two oldest boys treated in utero. Thus, timely replacement of a missing protein appears to be a promising therapeutic strategy for the most frequent ectodermal dysplasia and possibly additional congenital disorders.
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McManus CM, Lucci CM, Maranhão AQ, Pimentel D, Pimentel F, Rezende Paiva S. Response to heat stress for small ruminants: Physiological and genetic aspects. Livest Sci 2022. [DOI: 10.1016/j.livsci.2022.105028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Ectodysplasin A (EDA) Signaling: From Skin Appendage to Multiple Diseases. Int J Mol Sci 2022; 23:ijms23168911. [PMID: 36012178 PMCID: PMC9408960 DOI: 10.3390/ijms23168911] [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: 07/20/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 12/03/2022] Open
Abstract
Ectodysplasin A (EDA) signaling is initially identified as morphogenic signaling regulating the formation of skin appendages including teeth, hair follicles, exocrine glands in mammals, feathers in birds and scales in fish. Gene mutation in EDA signaling causes hypohidrotic ectodermal dysplasia (HED), a congenital hereditary disease with malformation of skin appendages. Interestingly, emerging evidence suggests that EDA and its receptors can modulate the proliferation, apoptosis, differentiation and migration of cancer cells, and thus may regulate tumorigenesis and cancer progression. More recently, as a newly discovered hepatocyte factor, EDA pathway has been demonstrated to be involved in the pathogenesis of nonalcoholic fatty liver disease (NAFLD) and type II diabetes by regulating glucose and lipid metabolism. In this review, we summarize the function of EDA signaling from skin appendage development to multiple other diseases, and discuss the clinical application of recombinant EDA protein as well as other potential targets for disease intervention.
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12
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Ji SF, Zhou LX, Sun ZF, Xiang JB, Cui SY, Li Y, Chen HT, Liu YQ, Gao HH, Fu XB, Sun XY. Small molecules facilitate single factor-mediated sweat gland cell reprogramming. Mil Med Res 2022; 9:13. [PMID: 35351192 PMCID: PMC8962256 DOI: 10.1186/s40779-022-00372-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 02/24/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Large skin defects severely disrupt the overall skin structure and can irreversibly damage sweat glands (SG), thus impairing the skin's physiological function. This study aims to develop a stepwise reprogramming strategy to convert fibroblasts into SG lineages, which may provide a promising method to obtain desirable cell types for the functional repair and regeneration of damaged skin. METHODS The expression of the SG markers cytokeratin 5 (CK5), cytokeratin 10 (CK10), cytokeratin 18 (CK18), carcino-embryonic antigen (CEA), aquaporin 5 (AQP5) and α-smooth muscle actin (α-SMA) was assessed with quantitative PCR (qPCR), immunofluorescence and flow cytometry. Calcium activity analysis was conducted to test the function of induced SG-like cells (iSGCs). Mouse xenograft models were also used to evaluate the in vivo regeneration of iSGCs. BALB/c nude mice were randomly divided into a normal group, SGM treatment group and iSGC transplantation group. Immunocytochemical analyses and starch-iodine sweat tests were used to confirm the in vivo regeneration of iSGCs. RESULTS EDA overexpression drove HDF conversion into iSGCs in SG culture medium (SGM). qPCR indicated significantly increased mRNA levels of the SG markers CK5, CK18 and CEA in iSGCs, and flow cytometry data demonstrated (4.18 ± 0.04)% of iSGCs were CK5 positive and (4.36 ± 0.25)% of iSGCs were CK18 positive. The addition of chemical cocktails greatly accelerated the SG fate program. qPCR results revealed significantly increased mRNA expression of CK5, CK18 and CEA in iSGCs, as well as activation of the duct marker CK10 and luminal functional marker AQP5. Flow cytometry indicated, after the treatment of chemical cocktails, (23.05 ± 2.49)% of iSGCs expressed CK5+ and (55.79 ± 3.18)% of iSGCs expressed CK18+, respectively. Calcium activity analysis indicated that the reactivity of iSGCs to acetylcholine was close to that of primary SG cells [(60.79 ± 7.71)% vs. (70.59 ± 0.34)%, ns]. In vivo transplantation experiments showed approximately (5.2 ± 1.1)% of the mice were sweat test positive, and the histological analysis results indicated that regenerated SG structures were present in iSGCs-treated mice. CONCLUSION We developed a SG reprogramming strategy to generate functional iSGCs from HDFs by using the single factor EDA in combination with SGM and small molecules. The generation of iSGCs has important implications for future in situ skin regeneration with SG restoration.
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Affiliation(s)
- Shuai-Fei Ji
- Research Center for Tissue Repair and Regeneration Affiliated To Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, 28 Fu Xing Road, Beijing, 100853, China.,Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, China
| | - Lai-Xian Zhou
- Research Center for Tissue Repair and Regeneration Affiliated To Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, 28 Fu Xing Road, Beijing, 100853, China.,Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, China
| | - Zhi-Feng Sun
- Department of Respiratory, The Second Medical Center, Chinese PLA General Hospital, Beijing, 100036, China
| | - Jiang-Bing Xiang
- Research Center for Tissue Repair and Regeneration Affiliated To Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, 28 Fu Xing Road, Beijing, 100853, China.,Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, China.,Bioengineering College of Chongqing University, Chongqing, 400044, China
| | - Shao-Yuan Cui
- Department of Nephrology, The First Medical Center, Chinese PLA General Hospital, State Key Laboratory of Kidney Diseases, Beijing, 100048, China
| | - Yan Li
- Research Center for Tissue Repair and Regeneration Affiliated To Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, 28 Fu Xing Road, Beijing, 100853, China.,Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, China
| | - Hua-Ting Chen
- Research Center for Tissue Repair and Regeneration Affiliated To Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, 28 Fu Xing Road, Beijing, 100853, China.,Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, China
| | - Yi-Qiong Liu
- Research Center for Tissue Repair and Regeneration Affiliated To Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, 28 Fu Xing Road, Beijing, 100853, China.,Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, China
| | - Huan-Huan Gao
- Research Center for Tissue Repair and Regeneration Affiliated To Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, 28 Fu Xing Road, Beijing, 100853, China.,Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, China
| | - Xiao-Bing Fu
- Research Center for Tissue Repair and Regeneration Affiliated To Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, 28 Fu Xing Road, Beijing, 100853, China. .,Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, China.
| | - Xiao-Yan Sun
- Research Center for Tissue Repair and Regeneration Affiliated To Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College; PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, 28 Fu Xing Road, Beijing, 100853, China. .,Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, China.
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13
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Wagner M, Bračun S, Duenser A, Sturmbauer C, Gessl W, Ahi EP. Expression variations in ectodysplasin-A gene (eda) may contribute to morphological divergence of scales in haplochromine cichlids. BMC Ecol Evol 2022; 22:28. [PMID: 35272610 PMCID: PMC8908630 DOI: 10.1186/s12862-022-01984-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 02/28/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Elasmoid scales are one of the most common dermal appendages and can be found in almost all species of bony fish differing greatly in their shape. Whilst the genetic underpinnings behind elasmoid scale development have been investigated, not much is known about the mechanisms involved in moulding of scales. To investigate the links between gene expression differences and morphological divergence, we inferred shape variation of scales from two different areas of the body (anterior and posterior) stemming from ten haplochromine cichlid species from different origins (Lake Tanganyika, Lake Malawi, Lake Victoria and riverine). Additionally, we investigated transcriptional differences of a set of genes known to be involved in scale development and morphogenesis in fish. RESULTS We found that scales from the anterior and posterior part of the body strongly differ in their overall shape, and a separate look on scales from each body part revealed similar trajectories of shape differences considering the lake origin of single investigated species. Above all, nine as well as 11 out of 16 target genes showed expression differences between the lakes for the anterior and posterior dataset, respectively. Whereas in posterior scales four genes (dlx5, eda, rankl and shh) revealed significant correlations between expression and morphological differentiation, in anterior scales only one gene (eda) showed such a correlation. Furthermore, eda displayed the most significant expression difference between species of Lake Tanganyika and species of the other two younger lakes. Finally, we found genetic differences in downstream regions of eda gene (e.g., in the eda-tnfsf13b inter-genic region) that are associated with observed expression differences. This is reminiscent of a genetic difference in the eda-tnfsf13b inter-genic region which leads to gain or loss of armour plates in stickleback. CONCLUSION These findings provide evidence for cross-species transcriptional differences of an important morphogenetic factor, eda, which is involved in formation of ectodermal appendages. These expression differences appeared to be associated with morphological differences observed in the scales of haplochromine cichlids indicating potential role of eda mediated signal in divergent scale morphogenesis in fish.
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Affiliation(s)
- Maximilian Wagner
- Institute of Biology, University of Graz, Universitätsplatz 2, 8010, Graz, Austria.,Department of Biology, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Sandra Bračun
- Institute of Biology, University of Graz, Universitätsplatz 2, 8010, Graz, Austria
| | - Anna Duenser
- Institute of Biology, University of Graz, Universitätsplatz 2, 8010, Graz, Austria
| | - Christian Sturmbauer
- Institute of Biology, University of Graz, Universitätsplatz 2, 8010, Graz, Austria.
| | - Wolfgang Gessl
- Institute of Biology, University of Graz, Universitätsplatz 2, 8010, Graz, Austria
| | - Ehsan Pashay Ahi
- Institute of Biology, University of Graz, Universitätsplatz 2, 8010, Graz, Austria. .,Organismal and Evolutionary Biology Research Programme, University of Helsinki, Viikinkaari 9, 00014, Helsinki, Finland.
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14
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Abstract
Fluid secretion by exocrine glandular organs is essential to the survival of mammals. Each glandular unit within the body is uniquely organized to carry out its own specific functions, with failure to establish these specialized structures resulting in impaired organ function. Here, we review glandular organs in terms of shared and divergent architecture. We first describe the structural organization of the diverse glandular secretory units (the end-pieces) and their fluid transporting systems (the ducts) within the mammalian system, focusing on how tissue architecture corresponds to functional output. We then highlight how defects in development of end-piece and ductal architecture impacts secretory function. Finally, we discuss how knowledge of exocrine gland structure-function relationships can be applied to the development of new diagnostics, regenerative approaches and tissue regeneration.
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Affiliation(s)
- Sameed Khan
- Department of Obstetrics Gynecology and Reproductive Biology, Michigan State University, East Lansing, MI 48824, USA
- Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - Sarah Fitch
- Department of Obstetrics Gynecology and Reproductive Biology, Michigan State University, East Lansing, MI 48824, USA
- Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - Sarah Knox
- Department of Cell and Tissue Biology, University of California, San Francisco, CA 94143, USA
| | - Ripla Arora
- Department of Obstetrics Gynecology and Reproductive Biology, Michigan State University, East Lansing, MI 48824, USA
- Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI 48824, USA
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15
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Vijayakumar P, Singaravadivelan A, Mishra A, Jagadeesan K, Bakyaraj S, Suresh R, Sivakumar T. Whole-Genome comparative analysis reveals genetic mechanisms of disease resistance and heat tolerance of tropical Bos indicus cattle breeds. Genome 2021; 65:241-254. [PMID: 34914549 DOI: 10.1139/gen-2021-0030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The Bos indicus cattle breeds have been naturally selected over thousands of years for disease resistance and thermo-tolerance. However, a genetic mechanism of these specific inherited characteristics needs to be discovered. Hence, in this study, the whole-genome comparative analysis of Bos indicus cattle breeds of Kangayam, Tharparkar, Sahiwal, Red Sindhi, and Hariana of the Indian subcontinent was conducted. The genetic variants identification analysis revealed a total of 15,58,51,012 SNPs and 1,00,62,805 InDels in the mapped reads across all Bos indicus cattle breeds. The functional annotation of 17,252 genes that comprised both, SNPs and InDels, of high functional impact on proteins, has been carried out. The functional annotation results revealed the pathways that were involved in the innate immune response including toll-like receptors, a retinoic acid-inducible gene I like receptors, NOD-like receptors, Jak-STAT signaling pathways, and the non-synonymous variants in the candidate immune genes. Further, we also identified several pathways involved in heat shock response, hair and skin properties, oxidative stress response, osmotic stress response, thermal sweating, feed intake, metabolism, and the non-synonymous variants in the candidate thermo-tolerant genes. These pathways and genes were directly or indirectly contributing to the disease resistance and thermo-tolerance adaptations of Bos indicus cattle breeds.
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Affiliation(s)
- Periyasamy Vijayakumar
- Veterinary College and Research Institute, TANUVAS, Animal Genetics and Breeding, Livestock Farm Comlex, Orathanadu, Tamil Nadu, India, 6145 625;
| | - Arunasalam Singaravadivelan
- Veterinary College and Research Institute, TANUVAS, Livestock Production Management, VCRI, Orathanadu, Orathanadu, Tamil Nadu, India, 614 625;
| | - Anamika Mishra
- High Security Animal Disease laboratory, Indian Veterinary Research Institute, Anand Nagar, Bhopal, Madhya Pradesh, India, 462021;
| | - Krishnan Jagadeesan
- University Training and Research Centre, Pillayarpatty - 613 403, , Animal Genetics and Breeding, Thanjavur, Tamil Nadu, India;
| | - Sanniyasi Bakyaraj
- College of Poultry Production and Management, TANUVAS, Hosur, Tamil nadu, India;
| | - Ramalingam Suresh
- Veterinary College and Research Institute, TANUVAS, Animal Genetics and Breeding, VETERINARY COLLEGE AND RESEARCH INSTITUTE, Orathanadu, Tamil Nadu, India, 243122.,Indian Veterinary Research Institute, 30072, 117, Salihothra Hostel (4th hostel), IVRI, BAREILLY, Izatnagar, UTTAR PRADESH, India, 243122;
| | - Thiagarajan Sivakumar
- Veterinary College and Research Institute, TANUVAS, Livestock Production Management, Orathanadu, Tamil Nadu, India;
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16
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Sun X, Xiang J, Chen R, Geng Z, Wang L, Liu Y, Ji S, Chen H, Li Y, Zhang C, Liu P, Yue T, Dong L, Fu X. Sweat Gland Organoids Originating from Reprogrammed Epidermal Keratinocytes Functionally Recapitulated Damaged Skin. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2103079. [PMID: 34569165 PMCID: PMC8596119 DOI: 10.1002/advs.202103079] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Indexed: 05/03/2023]
Abstract
Restoration of sweat glands (SwGs) represents a great issue in patients with extensive skin defects. Recent methods combining organoid technology with cell fate reprogramming hold promise for developing new regenerative methods for SwG regeneration. Here, a practical strategy for engineering functional human SwGs in vitro and in vivo is provided. First, by forced expression of the ectodysplasin-A in human epidermal keratinocytes (HEKs) combined with specific SwG culture medium, HEKs are efficiently converted into SwG cells (iSwGCs). The iSwGCs show typical morphology, gene expression pattern, and functions resembling human primary SwG cells. Second, by culturing the iSwGCs in a special 3D culturing system, SwG organoids (iSwGOs) that exhibit structural and biological features characteristic of native SwGs are obtained. Finally, these iSwGOs are successfully transplanted into a mouse skin damage model and they develop into fully functioning SwGs in vivo. Regeneration of functional SwG organoids from reprogrammed HEKs highlights the great translational potential for personalized SwG regeneration in patients with large skin defects.
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Affiliation(s)
- Xiaoyan Sun
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
| | - Jiangbing Xiang
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
- Bioengineering College of Chongqing UniversityChongqing400044P. R. China
| | - Runkai Chen
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
- Department of General SurgeryChinese PLA General Hospital28 Fu Xing RoadBeijing100853P. R. China
| | - Zhijun Geng
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
| | - Lintao Wang
- State Key Laboratory of Pharmaceutical BiotechnologySchool of Life SciencesNanjing UniversityNanjingJiangsu210023China
| | - Yiqiong Liu
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
| | - Shuaifei Ji
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
| | - Huating Chen
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
| | - Yan Li
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
| | - Cuiping Zhang
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
| | - Peng Liu
- Department of Biomedical EngineeringSchool of MedicineTsinghua UniversityHaidian DistrictBeijing100084China
| | - Tao Yue
- School of Mechatronic Engineering and AutomationShanghai UniversityShanghai200444China
- Shanghai Institute of Intelligent Science and TechnologyTongji UniversityShanghai200092China
| | - Lei Dong
- State Key Laboratory of Pharmaceutical BiotechnologySchool of Life SciencesNanjing UniversityNanjingJiangsu210023China
| | - Xiaobing Fu
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and 4th Medical CenterPLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing100048P. R. China
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17
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Cao M, Zhao J, Du L, Chen Z, Zhang L, Liu X, Cheng J, Yan Y, Zhang C, Li H. The combination of hair follicle-specific marker LHX2 and co-expressed marker can distinguish between sweat gland placodes and hair placodes in rat. J Mol Histol 2021; 52:1225-1232. [PMID: 34581932 DOI: 10.1007/s10735-021-10023-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 09/23/2021] [Indexed: 11/25/2022]
Abstract
Eccrine sweat gland (ESG) and hair follicle (HF) are different skin appendages but share many common development characteristics. Although the morphology of adult ESG and HF is obviously different, it is difficult to distinguish ESG placodes from HFs placodes morphologically. To study the fate determination of ESG and HF, specific antigen markers for ESG placodes and HF placodes must be found first to distinguish them. In the study, we detected the expression of commonly used keratins 4, 5, 7-10, 12, 14, 15, 17-20, 27 and 73, and the reported ESG and HF specific markers, P-cadherin, Lymphoid enhancer factor 1 (LEF1), LIM Homeobox gene 2 (LHX2), Na+/K+-ATPase (NKA) and Na+-K+-2Cl- cotransporter 1 (NKCC1) in ESG and HF placodes by single-immunofluorescence staining and double-immunofluorescence staining. To further verify the results of immunofluorescence staining, Western blot (WB) was used to detect the differential antigen and some co-expressed antigens of ESG and HF placodes. The results showed that both ESG and HF placodes expressed K4/5/14/1517/18, P-cadherin and LEF1, neither expressed K7/8/9/10/12/19/20/27/73, NKA or NKCC1. HF placodes specifically expressed LHX2. Combination of LHX2 and co-expressed antigen K14, can distinguish ESG placodes from HF placodes. We conclude that LHX2 is a specific marker for HF placodes, and ESG placodes and HF placodes can be distinguished by double immunofluorescence staining of the specific marker LHX2 and the co-expressed markers, such as K4, K5, K14, K15, K17, K18, P-cadherin and LEF1.
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Affiliation(s)
- Manxiu Cao
- Department of Wound Repair and Dermatologic Surgery, Jinzhou Medical University Graduate Training Base, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China
| | - Junhong Zhao
- Department of Wound Repair and Dermatologic Surgery, Jinzhou Medical University Graduate Training Base, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China.,Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China
| | - Lijie Du
- Department of Wound Repair and Dermatologic Surgery, Jinzhou Medical University Graduate Training Base, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China.,Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China
| | - Zixiu Chen
- Department of Wound Repair and Dermatologic Surgery, Jinzhou Medical University Graduate Training Base, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China
| | - Lei Zhang
- Mental Health Center, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China
| | - Xiang Liu
- Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China
| | - Jiaqi Cheng
- Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China
| | - Yongjing Yan
- Department of Wound Repair and Dermatologic Surgery, Jinzhou Medical University Graduate Training Base, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China
| | - Cuiping Zhang
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and Fourth Medical Center of PLA General Hospital, Beijing, 100048, China.
| | - Haihong Li
- Department of Wound Repair and Dermatologic Surgery, Jinzhou Medical University Graduate Training Base, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China. .,Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan, 442000, Hubei Province, China.
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18
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Oss-Ronen L, Cohen I. Epigenetic regulation and signalling pathways in Merkel cell development. Exp Dermatol 2021; 30:1051-1064. [PMID: 34152646 DOI: 10.1111/exd.14415] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 06/15/2021] [Accepted: 06/17/2021] [Indexed: 12/20/2022]
Abstract
Merkel cells are specialized epithelial cells connected to afferent nerve endings responsible for light-touch sensations, formed at specific locations in touch-sensitive regions of the mammalian skin. Although Merkel cells are descendants of the epidermal lineage, little is known about the mechanisms responsible for the development of these unique mechanosensory cells. Recent studies have highlighted that the Polycomb group (PcG) of proteins play a significant role in spatiotemporal regulation of Merkel cell formation. In addition, several of the major signalling pathways involved in skin development have been shown to regulate Merkel cell development as well. Here, we summarize the current understandings of the role of developmental regulators in Merkel cell formation, including the interplay between the epigenetic machinery and key signalling pathways, and the lineage-specific transcription factors involved in the regulation of Merkel cell development.
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Affiliation(s)
- Liat Oss-Ronen
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Science, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Idan Cohen
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Science, Ben-Gurion University of the Negev, Beer Sheva, Israel
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19
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Lin Y, Chen L, Zhang M, Xie S, Du L, Zhang X, Li H. Eccrine Sweat Gland and Its Regeneration: Current Status and Future Directions. Front Cell Dev Biol 2021; 9:667765. [PMID: 34395417 PMCID: PMC8355620 DOI: 10.3389/fcell.2021.667765] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 07/09/2021] [Indexed: 02/05/2023] Open
Abstract
Eccrine sweat glands (ESGs) play an important role in temperature regulation by secreting sweat. Insufficiency or dysfunction of ESGs in a hot environment or during exercise can lead to hyperthermia, heat exhaustion, heatstroke, and even death, but the ability of ESGs to repair and regenerate themselves is very weak and limited. Repairing the damaged ESGs and regenerating the lost or dysfunctional ESGs poses a challenge for dermatologists and bum surgeons. To promote and accelerate research on the repair and regeneration of ESGs, we summarized the development, structure and function of ESGs, and current strategies to repair and regenerate ESGs based on stem cells, scaffolds, and possible signaling pathways involved.
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Affiliation(s)
- Yao Lin
- Department of Plastic Surgery and Burn Center, Second Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Liyun Chen
- Department of Plastic Surgery and Burn Center, Second Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Mingjun Zhang
- Department of Plastic Surgery and Burn Center, Second Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Sitian Xie
- Department of Plastic Surgery and Burn Center, Second Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Lijie Du
- Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Xiang Zhang
- Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Haihong Li
- Department of Plastic Surgery and Burn Center, Second Affiliated Hospital of Shantou University Medical College, Shantou, China
- Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, China
- *Correspondence: Haihong Li,
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20
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Development and Maintenance of Epidermal Stem Cells in Skin Adnexa. Int J Mol Sci 2020; 21:ijms21249736. [PMID: 33419358 PMCID: PMC7766199 DOI: 10.3390/ijms21249736] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/18/2020] [Accepted: 12/18/2020] [Indexed: 01/10/2023] Open
Abstract
The skin surface is modified by numerous appendages. These structures arise from epithelial stem cells (SCs) through the induction of epidermal placodes as a result of local signalling interplay with mesenchymal cells based on the Wnt–(Dkk4)–Eda–Shh cascade. Slight modifications of the cascade, with the participation of antagonistic signalling, decide whether multipotent epidermal SCs develop in interfollicular epidermis, scales, hair/feather follicles, nails or skin glands. This review describes the roles of epidermal SCs in the development of skin adnexa and interfollicular epidermis, as well as their maintenance. Each skin structure arises from distinct pools of epidermal SCs that are harboured in specific but different niches that control SC behaviour. Such relationships explain differences in marker and gene expression patterns between particular SC subsets. The activity of well-compartmentalized epidermal SCs is orchestrated with that of other skin cells not only along the hair cycle but also in the course of skin regeneration following injury. This review highlights several membrane markers, cytoplasmic proteins and transcription factors associated with epidermal SCs.
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21
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Zhang L, Zhang X, Du L, Zhang C, Li H. Cholinergic- rather than adrenergic-induced sweating play a role in developing and developed rat eccrine sweat glands. Exp Anim 2020; 70:218-224. [PMID: 33298631 PMCID: PMC8150243 DOI: 10.1538/expanim.20-0144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Both cholinergic and adrenergic stimulation can induce sweat secretion in human eccrine sweat glands, but whether cholinergic and adrenergic stimulation play same roles in rat eccrine sweat glands is still controversial. To explore the innervations, and adrenergic- and cholinergic-induced secretory response in developing and developed rat eccrine sweat glands, rat hind footpads from embryonic day (E) 15.5-20.5, postanal day (P) 1-14, P21 and adult were fixed, embedded, sectioned and subjected to immunofluorescence staining for general fiber marker protein gene product 9.5 (PGP 9.5), adrenergic fiber marker tyrosine hydroxylase (TH) and cholinergic fiber marker vasoactive intestinal peptide (VIP), and cholinergic- and adrenergic-induced sweat secretion was detected at P1-P21 and adult rats by starch-iodine test. The results showed that eccrine sweat gland placodes of SD rats were first appeared at E19.5, and the expression of PGP 9.5 was detected surrounding the sweat gland placodes at E19.5, TH at P7, and VIP at P11. Pilocarpine-induced sweat secretion was first detected at P16 in hind footpads by starch-iodine test. There was no measurable sweating when stimulated by alpha- or beta-adrenergic agonists at all the examined time points. We conclude that rat eccrine sweat glands, just as human eccrine sweat glands, co-express adrenergic and cholinergic fibers, but different from human eccrine sweat glands, cholinergic- rather than adrenergic-induced sweating plays a role in the developing and developed rat eccrine sweat glands.
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Affiliation(s)
- Lei Zhang
- Mental Health Center, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan 442000, Hubei Province, P.R. China
| | - Xiang Zhang
- Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan 442000, Hubei Province, P.R. China
| | - Lijie Du
- Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan 442000, Hubei Province, P.R. China
| | - Cuiping Zhang
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department and Fourth Medical Center of PLA General Hospital, Beijing 100048, P.R. China
| | - Haihong Li
- Department of Wound Repair and Dermatologic Surgery, Taihe Hospital, Hubei University of Medicine, 32 South Renmin Road, Shiyan 442000, Hubei Province, P.R. China
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22
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Comparative investigation of coarse and fine wool sheep skin indicates the early regulators for skin and wool diversity. Gene 2020; 758:144968. [PMID: 32707304 DOI: 10.1016/j.gene.2020.144968] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/01/2020] [Accepted: 07/17/2020] [Indexed: 02/08/2023]
Abstract
The hair follicle is an excellent mini-system illustrating the mechanisms governing organogenesis and regeneration. Although the general mechanisms modulating skin and hair follicle development are widely studied in mouse and chicken models, the delicate network regulating skin and hair diversity remains largely unclear. Sheep is an additional model to address the various wool characteristics observed in nature. The coarse and fine wool sheep with diverse fibers were examined to show differences in the primary wool follicle size and skin thickness. The molecular dynamics in skin staged at the primary wool follicle induction between two sheep lines were investigated by RNA-sequencing analyses to generate 1994 differentially expressed genes revealing marker genes for epithelium (6 genes), dermal condensate (38 genes) and dermal fibroblast (58 genes) highly correlated with skin and wool follicle morphological differences. The DEGs were enriched in GO terms represented by epithelial cell migration and differentiation, regulation of hair follicle development and ectodermal placode formation, and KEGG pathways typified by WNT and Hedgehog signaling pathways governing the differences of skin structure. The qPCR detection of 9 genes confirmed the similar expression tendency with RNA-sequencing profiles. This comparative study of coarse and fine wool sheep skin reveals the presence of skin and wool follicle differences at primary wool follicle induction stage, and indicates the potential effectors (APCDD1, FGF20, DKK1, IGFBP3 and SFRP4) regulating the skin compartments during the early morphogenesis of primary wool follicles to shape the variable wool fiber thickness in later developmental stages.
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23
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Sweat gland regeneration: Current strategies and future opportunities. Biomaterials 2020; 255:120201. [PMID: 32592872 DOI: 10.1016/j.biomaterials.2020.120201] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/21/2020] [Accepted: 06/09/2020] [Indexed: 12/13/2022]
Abstract
For patients with extensive skin defects, loss of sweat glands (SwGs) greatly decreases their quality of life. Indeed, difficulties in thermoregulation, ion reabsorption, and maintaining fluid balance might render them susceptible to hyperthermia, heatstroke, or even death. Despite extensive studies on the stem cell biology of the skin in recent years, in-situ regeneration of SwGs with both structural and functional fidelity is still challenging because of the limited regenerative capacity and cell fate control of resident progenitors. To overcome these challenges, one must consider both the intrinsic factors relevant to genetic and epigenetic regulation and cues from the cellular microenvironment. Here, we describe recent progress in molecular biology, developmental pathways, and cellular evolution associated with SwGdevelopment and maturation. This is followed by a summary of the current strategies used for cell-fate modulation, transmembrane drug delivery, and scaffold design associated with SwGregeneration. Finally, we offer perspectives for creating more sophisticated systems to accelerate patients' innate healing capacity and developing engineered skin constructs to treat or replace damaged tissues structurally and functionally.
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24
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Doolan BJ, Gomaa NS, Fawzy MM, Dogheim NN, Liu L, Mellerio JE, Onoufriadis A, McGrath JA. Ectodermal dysplasia-skin fragility syndrome: Two new cases and review of this desmosomal genodermatosis. Exp Dermatol 2020; 29:520-530. [PMID: 32248567 DOI: 10.1111/exd.14096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/06/2020] [Accepted: 03/24/2020] [Indexed: 01/15/2023]
Abstract
BACKGROUND Desmosomes are intercellular cadherin-mediated adhesion complexes that anchor intermediate filaments to the cell membrane and are required for strong adhesion for tissues under mechanical stress. One specific component of desmosomes is plakophilin 1 (PKP1), which is mainly expressed in the spinous layer of the epidermis. Loss-of-function autosomal recessive mutations in PKP1 result in ectodermal dysplasia-skin fragility (EDSF) syndrome, the initial inherited Mendelian disorder of desmosomes first reported in 1997. METHODS To investigate two new cases of EDSF syndrome and to perform a literature review of pathogenic PKP1 mutations from 1997 to 2019. RESULTS Sanger sequencing of PKP1 identified two new homozygous frameshift mutations: c.409_410insAC (p.Thr137Thrfs*61) and c.1213delA (p.Arg411Glufs*22). Comprehensive analyses were performed for the 18 cases with confirmed bi-allelic PKP1 gene mutations, but not for one mosaic case or 6 additional cases that lacked gene mutation studies. All pathogenic germline mutations were loss-of-function (splice site, frameshift, nonsense) with mutations in the intron 1 consensus acceptor splice site (c.203-1>A or G>T) representing recurrent findings. Skin fragility and nail involvement were present in all affected individuals (18/18), with most cases showing palmoplantar keratoderma (16/18), alopecia/hypotrichosis (16/18) and perioral fissuring/cheilitis (12/15; not commented on in 3 cases). Further observations in some individuals included pruritus, failure to thrive with low height/weight centiles, follicular hyperkeratosis, hypohidrosis, walking difficulties, dysplastic dentition and recurrent chest infections. CONCLUSION These data expand the molecular basis of EDSF syndrome and help define the spectrum of both the prototypic and variable manifestations of this desmosomal genodermatosis.
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Affiliation(s)
- Brent J Doolan
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Nesrin S Gomaa
- Dermatology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Mohamed M Fawzy
- Dermatology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Noha N Dogheim
- Dermatology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Lu Liu
- Viapath, Guy's Hospital, London, UK
| | - Jemima E Mellerio
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Alexandros Onoufriadis
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - John A McGrath
- St John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
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25
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Hu X, Zhang X, Liu Z, Li S, Zheng X, Nie Y, Tao Y, Zhou X, Wu W, Yang G, Zhao Q, Zhang Y, Xu Q, Mou C. Exploration of key regulators driving primary feather follicle induction in goose skin. Gene 2020; 731:144338. [PMID: 31923576 DOI: 10.1016/j.gene.2020.144338] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 12/13/2019] [Accepted: 01/06/2020] [Indexed: 11/28/2022]
Abstract
The primary feather follicles are universal skin appendages widely distributed in the skin of feathered birds. The morphogenesis and development of the primary feather follicles in goose skin remain largely unknown. Here, the induction of primary feather follicles in goose embryonic skin (pre-induction vs induction) was investigated by de novo transcriptome analyses to reveal 409 differentially expressed genes (DEGs). The DEGs were characterized to potentially regulate the de novo formation of feather follicle primordia consisting of placode (4 genes) and dermal condensate (12 genes), and the thickening of epidermis (5 genes) and dermal fibroblasts (17 genes), respectively. Further analyses enriched DEGs into GO terms represented as cell adhesion and KEGG pathways including Wnt and Hedgehog signaling pathways that are highly correlated with cell communication and molecular regulation. Six selected Wnt pathway genes were detected by qPCR with up-regulation in goose skin during the induction of primary feather follicles. The localization of WNT16, SFRP1 and FRZB by in situ hybridization showed weak expression in the primary feather primordia, whereas FZD1, LEF1 and DKK1 were expressed initially in the inter-follicular skin and feather follicle primordia, then mainly restricted in the feather primordia. The spatial-temporal expression patterns indicate that Wnt pathway genes DKK1, FZD1 and LEF1 are the important regulators functioned in the induction of primary feather follicle in goose skin. The dynamic molecular changes and specific gene expression patterns revealed in this report provide the general knowledge of primary feather follicle and skin development in waterfowl, and contribute to further understand the diversity of hair and feather development beyond the mouse and chicken models.
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Affiliation(s)
- Xuewen Hu
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Xiaokang Zhang
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Zhiwei Liu
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Shaomei Li
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Xinting Zheng
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Yangfan Nie
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Yingfeng Tao
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Xiaoliu Zhou
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Wenqing Wu
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Ge Yang
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Qianqian Zhao
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China
| | - Yang Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225000, China
| | - Qi Xu
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225000, China
| | - Chunyan Mou
- Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430000, China.
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26
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Li R, Li C, Chen H, Li R, Chong Q, Xiao H, Chen S. Genome-wide scan of selection signatures in Dehong humped cattle for heat tolerance and disease resistance. Anim Genet 2019; 51:292-299. [PMID: 31887783 DOI: 10.1111/age.12896] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2019] [Indexed: 01/11/2023]
Abstract
Dehong humped cattle (DHH) is an indigenous zebu breed from southwestern China that possesses characteristics of heat tolerance and strong disease resistance and adapts well to the local tropical and subtropical climatic conditions. However, information on selection signatures of DHH is scarce. Herein, we compared the genomes of DHH and each of Diqing and Zhaotong cattle breeds using the population differentiation index (FST ), cross-population extended haplotype homozygosity (XP-EHH) and cross-population composite likelihood ratio (XP-CLR) methods to explore the genomic signatures of heat tolerance and disease resistance in DHH. Several pathways and genes carried selection signatures, including thermal sweating (calcium signaling pathway), heat shock (HSF1) and oxidative stress response (PLCB1, PLCB4), coat color (RAB31), feed intake (ATP8A1, SHC3) and reproduction (TP63, MAP3K13, PTPN4, PPP3CC, ADAMTSL1, SS18L1, OSBPL2, TOX, RREB1, GRK2). These identified pathways and genes may contribute to heat tolerance in DHH. Simultaneously, we also identified LIPH, TP63 and CBFA2T3 genes under positive selection that were associated with immunity.
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Affiliation(s)
- R Li
- School of Life Sciences, Yunnan University, Kunming, Yunnan, 650500, China
| | - C Li
- School of Life Sciences, Yunnan University, Kunming, Yunnan, 650500, China.,National Demonstration Center for Experimental Life Sciences Education, Yunnan University, Kunming, Yunnan, 650500, China
| | - H Chen
- School of Life Sciences, Yunnan University, Kunming, Yunnan, 650500, China
| | - R Li
- School of Life Sciences, Yunnan University, Kunming, Yunnan, 650500, China
| | - Q Chong
- School of Life Sciences, Yunnan University, Kunming, Yunnan, 650500, China
| | - H Xiao
- School of Life Sciences, Yunnan University, Kunming, Yunnan, 650500, China
| | - S Chen
- School of Life Sciences, Yunnan University, Kunming, Yunnan, 650500, China.,National Demonstration Center for Experimental Life Sciences Education, Yunnan University, Kunming, Yunnan, 650500, China
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27
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Heterogeneity of Sweat Gland Stem Cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019. [PMID: 31487018 DOI: 10.1007/978-3-030-24108-7_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/29/2023]
Abstract
Sweat glands play an important role in skin physiology and are an integral part of the natural skin barrier. In order to maintain functionality throughout life, sweat glands make use of several types of stem cells. This chapter focuses on the classification of different types of stem cells found in the sweat gland and their physiological roles. First, sweat gland formation during skin maturation is addressed in order to give an overview of sweat gland origin and formation in vivo. Then, different kinds of adult sweat gland stem cells are introduced and classified between different potency levels and corresponding physiological roles. Finally, the importance of these cell sources for future developments, including applications in wound healing and cosmetics research, is discussed.
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28
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Coates M, Mariottoni P, Corcoran DL, Kirshner HF, Jaleel T, Brown DA, Brooks SR, Murray J, Morasso MI, MacLeod AS. The skin transcriptome in hidradenitis suppurativa uncovers an antimicrobial and sweat gland gene signature which has distinct overlap with wounded skin. PLoS One 2019; 14:e0216249. [PMID: 31059533 PMCID: PMC6502346 DOI: 10.1371/journal.pone.0216249] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/16/2019] [Indexed: 12/15/2022] Open
Abstract
Hidradenitis suppurativa (HS) is a debilitating chronic inflammatory skin disease resulting in non-healing wounds affecting body areas of high hair follicle and sweat gland density. The pathogenesis of HS is not well understood but appears to involve dysbiosis-driven aberrant activation of the innate immune system leading to excessive inflammation. Marked dysregulation of antimicrobial peptides and proteins (AMPs) in HS is observed, which may contribute to this sustained inflammation. Here, we analyzed HS skin transcriptomes from previously published studies and integrated these findings through a comparative analysis with a published wound healing data set and with immunofluorescence and qPCR analysis from new HS patient samples. Among the top differently expressed genes between lesional and non-lesional HS skin were members of the S100 family as well as dermcidin, the latter known as a sweat gland-associated AMP and one of the most downregulated genes in HS lesions. Interestingly, many genes associated with sweat gland function, such as secretoglobins and aquaporin 5, were decreased in HS lesional skin and we discovered that these genes demonstrated opposite expression profiles in healing skin. Conversely, HS lesional and wounded skin shared a common gene signature including genes encoding for S100 proteins, defensins, and genes encoding antiviral proteins. Overall, our results suggest that the pathogenesis of HS may be driven by changes in AMP expression and altered sweat gland function, and may share a similar pathology with chronic wounds.
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Affiliation(s)
- Margaret Coates
- Department of Dermatology, Duke University, Durham, NC, United States of America
| | - Paula Mariottoni
- Department of Dermatology, Duke University, Durham, NC, United States of America
| | - David L. Corcoran
- Duke Center for Genomic and Computational Biology, Duke University, Durham, NC, United States of America
| | - Hélène Fradin Kirshner
- Duke Center for Genomic and Computational Biology, Duke University, Durham, NC, United States of America
| | - Tarannum Jaleel
- Department of Dermatology, Duke University, Durham, NC, United States of America
| | - David A. Brown
- Department of Surgery, Duke University, Durham, NC, United States of America
| | - Stephen R. Brooks
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institute of Health, Bethesda, MD, United States of America
| | - John Murray
- Department of Dermatology, Duke University, Durham, NC, United States of America
| | - Maria I. Morasso
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institute of Health, Bethesda, MD, United States of America
| | - Amanda S. MacLeod
- Department of Dermatology, Duke University, Durham, NC, United States of America
- Department of Immunology, Duke University, Durham, NC, United States of America
- Pinnell Center for Investigative Dermatology, Duke University, Durham, NC, United States of America
- * E-mail:
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29
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Yao B, Xie J, Liu N, Hu T, Song W, Huang S, Fu X. Direct reprogramming of epidermal cells toward sweat gland-like cells by defined factors. Cell Death Dis 2019; 10:272. [PMID: 30894517 PMCID: PMC6426881 DOI: 10.1038/s41419-019-1503-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 02/19/2019] [Accepted: 02/26/2019] [Indexed: 02/04/2023]
Abstract
Several studies have reported inducing adult cells into sweat gland-like cells; however, slow transition and low efficiency limit the potential for cell-based treatment. Here, we show that overexpression of the transcription factor FoxC1 was sufficient to reprogram epidermal cells to induced functional sweat gland-like cells (iSGCs). The iSGCs expressing secreting-related genes, had a global gene expression profile between fetal SGCs (P5) and adult SGCs (P28). Moreover, iSGCs transplanted into the burn mice model facilitated wound repair and sweat gland regeneration. We further demonstrated that the Foxc1 upregulated BMP5 transcription and BMP5 is responsible for the cell-type transition. Collectively, this study shows that lineage reprogramming of epidermal cells into iSGCs provides an excellent cell source and a promising regenerative strategy for anhidrosis and hypohidrosis.
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Affiliation(s)
- Bin Yao
- Wound Healing and Cell Biology Laboratory, Institute of Basic Medical Sciences, General Hospital of PLA, Beijing, 100853, P.R. China.,Key Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Fourth Medical Center of PLA General Hospital, Beijing, 100048, P.R. China
| | - Jiangfan Xie
- Burn Department of the First People's Hospital of Zhengzhou City, Zhengzhou, 450004, P.R. China
| | - Nanbo Liu
- Department of Cardiac Surgery, Affiliated South China Hospital, Southern Medical University (Guangdong Province People's Hospital), Guangzhou, 510515, P.R. China
| | - Tian Hu
- Wound Healing and Cell Biology Laboratory, Institute of Basic Medical Sciences, General Hospital of PLA, Beijing, 100853, P.R. China.,School of Medicine, Nankai University, Tianjin, 300052, P.R. China
| | - Wei Song
- Key Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Fourth Medical Center of PLA General Hospital, Beijing, 100048, P.R. China
| | - Sha Huang
- Wound Healing and Cell Biology Laboratory, Institute of Basic Medical Sciences, General Hospital of PLA, Beijing, 100853, P.R. China.
| | - Xiaobing Fu
- Wound Healing and Cell Biology Laboratory, Institute of Basic Medical Sciences, General Hospital of PLA, Beijing, 100853, P.R. China. .,Key Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Fourth Medical Center of PLA General Hospital, Beijing, 100048, P.R. China.
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30
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Diao J, Liu J, Wang S, Chang M, Wang X, Guo B, Yu Q, Yan F, Su Y, Wang Y. Sweat gland organoids contribute to cutaneous wound healing and sweat gland regeneration. Cell Death Dis 2019; 10:238. [PMID: 30858357 PMCID: PMC6411741 DOI: 10.1038/s41419-019-1485-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 02/01/2023]
Abstract
Sweat glands perform a vital thermoregulatory function in mammals. Like other skin components, they originate from epidermal progenitors. However, they have low regenerative potential in response to injury. We have established a sweat gland culture and expansion method using 3D organoids cultures. The epithelial cells derived from sweat glands in dermis of adult mouse paw pads were embedded into Matrigel and formed sweat gland organoids (SGOs). These organoids maintained remarkable stem cell features and demonstrated differentiation capacity to give rise to either sweat gland cells (SGCs) or epidermal cells. Moreover, the bipotent SGO-derived cells could be induced into stratified epidermis structures at the air−liquid interface culture in a medium tailored for skin epidermal cells in vitro. The SGCs embedded in Matrigel tailored for sweat glands formed epithelial organoids, which expressed sweat-gland-specific markers, such as cytokeratin (CK) 18 and CK19, aquaporin (AQP) 5 and αATP. More importantly, they had potential of regeneration of epidermis and sweat gland when they were transplanted into the mouse back wound and claw pad with sweat gland injury, respectively. In summary, we established and optimized culture conditions for effective generation of mouse SGOs. These cells are candidates to restore impaired sweat gland tissue as well as to improve cutaneous skin regeneration.
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Affiliation(s)
- Jinmei Diao
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China
| | - Juan Liu
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China
| | - Shuyong Wang
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China
| | - Mingyang Chang
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China
| | - Xuan Wang
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China
| | - Baolin Guo
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China
| | - Qunfang Yu
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China
| | - Fang Yan
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China
| | - Yuxin Su
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China
| | - Yunfang Wang
- Stem Cell and Tissue Engineering Lab, Institute of Health Service and Transfusion Medicine, 100850, Beijing, China.
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31
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Li S, Zheng X, Nie Y, Chen W, Liu Z, Tao Y, Hu X, Hu Y, Qiao H, Qi Q, Pei Q, Cai D, Yu M, Mou C. Defining Key Genes Regulating Morphogenesis of Apocrine Sweat Gland in Sheepskin. Front Genet 2019; 9:739. [PMID: 30761184 PMCID: PMC6363705 DOI: 10.3389/fgene.2018.00739] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Accepted: 12/22/2018] [Indexed: 01/04/2023] Open
Abstract
The apocrine sweat gland is a unique skin appendage in humans compared to mouse and chicken models. The absence of apocrine sweat glands in chicken and murine skin largely restrains further understanding of the complexity of human skin biology and skin diseases, like hircismus. Sheep may serve as an additional system for skin appendage investigation owing to the distributions and histological similarities between the apocrine sweat glands of sheep trunk skin and human armpit skin. To understand the molecular mechanisms underlying morphogenesis of apocrine sweat glands in sheepskin, transcriptome analyses were conducted to reveal 1631 differentially expressed genes that were mainly enriched in three functional groups (cellular component, molecular function and biological process), particularly in gland, epithelial, hair follicle and skin development. There were 7 Gene Ontology (GO) terms enriched in epithelial cell migration and morphogenesis of branching epithelium that were potentially correlated with the wool follicle peg elongation. An additional 5 GO terms were enriched in gland morphogenesis (20 genes), gland development (42 genes), salivary gland morphogenesis and development (8 genes), branching involved in salivary gland morphogenesis (6 genes) and mammary gland epithelial cell differentiation (4 genes). The enriched gland-related genes and two Kyoto Encyclopedia of Genes and Genomes pathway genes (WNT and TGF-β) were potentially involved in the induction of apocrine sweat glands. Genes named BMPR1A, BMP7, SMAD4, TGFB3, WIF1, and WNT10B were selected to validate transcript expression by qRT-PCR. Immunohistochemistry was performed to localize markers for hair follicle (SOX2), skin fibroblast (PDGFRB), stem cells (SOX9) and BMP signaling (SMAD5) in sheepskin. SOX2 and PDGFRB were absent in apocrine sweat glands. SOX9 and SMAD5 were both observed in precursor cells of apocrine sweat glands and later in gland ducts. These results combined with the upregulation of BMP signaling genes indicate that apocrine sweat glands were originated from outer root sheath of primary wool follicle and positively regulated by BMP signaling. This report established the primary network regulating early development of apocrine sweat glands in sheepskin and will facilitate the further understanding of histology and pathology of apocrine sweat glands in human and companion animal skin.
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Affiliation(s)
- Shaomei Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xinting Zheng
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Yangfan Nie
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Wenshuo Chen
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Zhiwei Liu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Yingfeng Tao
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xuewen Hu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Yong Hu
- Qinghai Academy of Animal Science and Veterinary Medicine, Xining, China
| | - Haisheng Qiao
- Qinghai Academy of Animal Science and Veterinary Medicine, Xining, China
| | - Quanqing Qi
- Sanjiaocheng Sheep Breeding Farm, Haibei, China
| | | | - Danzhuoma Cai
- Animal Husbandry and Veterinary Station, Haixi, China
| | - Mei Yu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Chunyan Mou
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
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32
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Regional Control of Hairless versus Hair-Bearing Skin by Dkk2. Cell Rep 2018; 25:2981-2991.e3. [PMID: 30509557 DOI: 10.1016/j.celrep.2018.11.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 09/10/2018] [Accepted: 11/01/2018] [Indexed: 12/17/2022] Open
Abstract
Haired skin is a defining characteristic of mammals. However, some specialized skin regions, such as human palms, soles and ventral wrist, and mouse plantar foot, are entirely hairless. Using mouse plantar skin as a model system, we show that the endogenous secreted Wnt inhibitor DKK2 suppresses plantar hair follicle development and permits the formation of hairless skin. Plantar skin retains all of the mechanistic components needed for hair follicle development, as genetic deletion of Dkk2 permits formation of fully functional plantar hair follicles that give rise to external hair, contain sebaceous glands and a stem cell compartment, and undergo regenerative growth. In the absence of Dkk2, Wnt/β-catenin signaling activity is initially broadly elevated in embryonic plantar skin and gradually becomes patterned, mimicking follicular development in normally haired areas. These data provide a paradigm in which regionally restricted expression of a Wnt inhibitor underlies specification of hairless versus hairy skin.
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33
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Li S, Zhou J, Zhang L, Li J, Yu J, Ning K, Qu Y, He H, Chen Y, Reinach PS, Liu C, Liu Z, Li W. Ectodysplasin A regulates epithelial barrier function through sonic hedgehog signalling pathway. J Cell Mol Med 2018; 22:230-240. [PMID: 28782908 PMCID: PMC5742694 DOI: 10.1111/jcmm.13311] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 06/16/2017] [Indexed: 11/30/2022] Open
Abstract
Ectodysplasin A (Eda), a member of the tumour necrosis factor superfamily, plays an important role in ectodermal organ development. An EDA mutation underlies the most common of ectodermal dysplasias, that is X-linked hypohidrotic ectodermal dysplasia (XLHED) in humans. Even though it lacks a developmental function, the role of Eda during the postnatal stage remains elusive. In this study, we found tight junctional proteins ZO-1 and claudin-1 expression is largely reduced in epidermal, corneal and lung epithelia in Eda mutant Tabby mice at different postnatal ages. These declines are associated with tail ulceration, corneal pannus formation and lung infection. Furthermore, topical application of recombinant Eda protein markedly mitigated corneal barrier dysfunction. Using cultures of a human corneal epithelial cell line and Tabby mouse skin tissue explants, Eda up-regulated expression of ZO-1 and claudin-1 through activation of the sonic hedgehog signalling pathway. We conclude that EDA gene expression contributes to the maintenance of epithelial barrier function. Such insight may help efforts to identify novel strategies for improving management of XLHED disease manifestations in a clinical setting.
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Affiliation(s)
- Sanming Li
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
| | - Jing Zhou
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
| | - Liying Zhang
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
| | - Juan Li
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
| | - Jingwen Yu
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
| | - Ke Ning
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
| | - Yangluowa Qu
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
| | - Hui He
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
| | - Yongxiong Chen
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
| | | | - Chia‐Yang Liu
- School of Optometry BloomingtonIndiana University BloomingtonBloomingtonINUSA
| | - Zuguo Liu
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
- Xiamen University affiliated Xiamen Eye CenterXiamenFujianChina
| | - Wei Li
- Eye Institute of Xiamen UniversityXiamenFujianChina
- Medical College of Xiamen UniversityXiamenFujianChina
- Fujian Provincial Key Laboratory of Ophthalmology and Visual ScienceXiamenFujianChina
- Xiamen University affiliated Xiamen Eye CenterXiamenFujianChina
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34
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Taye M, Lee W, Caetano-Anolles K, Dessie T, Hanotte O, Mwai OA, Kemp S, Cho S, Oh SJ, Lee HK, Kim H. Whole genome detection of signature of positive selection in African cattle reveals selection for thermotolerance. Anim Sci J 2017; 88:1889-1901. [PMID: 28748670 DOI: 10.1111/asj.12851] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 04/20/2017] [Indexed: 12/11/2022]
Abstract
As African indigenous cattle evolved in a hot tropical climate, they have developed an inherent thermotolerance; survival mechanisms include a light-colored and shiny coat, increased sweating, and cellular and molecular mechanisms to cope with high environmental temperature. Here, we report the positive selection signature of genes in African cattle breeds which contribute for their heat tolerance mechanisms. We compared the genomes of five indigenous African cattle breeds with the genomes of four commercial cattle breeds using cross-population composite likelihood ratio (XP-CLR) and cross-population extended haplotype homozygosity (XP-EHH) statistical methods. We identified 296 (XP-EHH) and 327 (XP-CLR) positively selected genes. Gene ontology analysis resulted in 41 biological process terms and six Kyoto Encyclopedia of Genes and Genomes pathways. Several genes and pathways were found to be involved in oxidative stress response, osmotic stress response, heat shock response, hair and skin properties, sweat gland development and sweating, feed intake and metabolism, and reproduction functions. The genes and pathways identified directly or indirectly contribute to the superior heat tolerance mechanisms in African cattle populations. The result will improve our understanding of the biological mechanisms of heat tolerance in African cattle breeds and opens an avenue for further study.
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Affiliation(s)
- Mengistie Taye
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea.,College of Agriculture and Environmental Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| | - Wonseok Lee
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Kelsey Caetano-Anolles
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Tadelle Dessie
- International Livestock Research Institute (ILRI), Addis Ababa, Ethiopia
| | - Olivier Hanotte
- International Livestock Research Institute (ILRI), Addis Ababa, Ethiopia.,The University of Nottingham, School of Life Sciences, Nottingham, UK
| | - Okeyo Ally Mwai
- International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Stephen Kemp
- The Centre for Tropical Livestock Genetics and Health, The Roslin Institute, The University of Edinburgh, Midlothian, UK.,International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Seoae Cho
- C&K genomics, Seoul National University, Seoul, Korea
| | - Sung Jong Oh
- National Institute of Animal Science, RDA, Wanju, Korea
| | - Hak-Kyo Lee
- Department of Animal Biotechnology, The Animal Molecular Genetics & Breeding Center, Chonbuk National University, Jeonju, Korea
| | - Heebal Kim
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Korea.,C&K genomics, Seoul National University, Seoul, Korea.,Interdisciplinary Program in Bioinformatics, Seoul National University, Seoul, Korea.,Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
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35
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Lu CP, Polak L, Keyes BE, Fuchs E. Spatiotemporal antagonism in mesenchymal-epithelial signaling in sweat versus hair fate decision. Science 2017; 354:354/6319/aah6102. [PMID: 28008008 DOI: 10.1126/science.aah6102] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 09/16/2016] [Accepted: 11/18/2016] [Indexed: 12/12/2022]
Abstract
The gain of eccrine sweat glands in hairy body skin has empowered humans to run marathons and tolerate temperature extremes. Epithelial-mesenchymal cross-talk is integral to the diverse patterning of skin appendages, but the molecular events underlying their specification remain largely unknown. Using genome-wide analyses and functional studies, we show that sweat glands are specified by mesenchymal-derived bone morphogenetic proteins (BMPs) and fibroblast growth factors that signal to epithelial buds and suppress epithelial-derived sonic hedgehog (SHH) production. Conversely, hair follicles are specified when mesenchymal BMP signaling is blocked, permitting SHH production. Fate determination is confined to a critical developmental window and is regionally specified in mice. In contrast, a shift from hair to gland fates is achieved in humans when a spike in BMP silences SHH during the final embryonic wave(s) of bud morphogenesis.
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Affiliation(s)
- Catherine P Lu
- Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
| | - Lisa Polak
- Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
| | - Brice E Keyes
- Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
| | - Elaine Fuchs
- Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA. .,Howard Hughes Medical Institute, Chevy Chase, MD, 20815-6789, USA
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36
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Chee MK, Jo SK, Sohn KC, Kim CD, Lee JH, Lee YH. Effects of Brn2 overexpression on eccrine sweat gland development in the mouse paw. Biochem Biophys Res Commun 2017. [PMID: 28648603 DOI: 10.1016/j.bbrc.2017.06.138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Eccrine sweat glands regulate body temperature by secreting water and electrolytes. In humans, eccrine sweat glands are ubiquitous in the skin, except in the lips and external genitalia. In mice, eccrine sweat glands are present only in the paw pad. Brn2 is a protein belonging to a large family of transcription factors. A few studies have examined Brn2 in melanoma cells and epidermal keratinocytes. This study investigated changes in the skin in the K5-Brn2 transgenic mouse, which overexpresses Brn2 and contains the keratin 5 promotor. Interestingly, the volume of eccrine sweat glands was reduced markedly in the K5-Brn2 transgenic mouse compared with the wild-type, while the expression of aquaporin 5, important molecule in sweat secretion, was increased in each sweat gland cell, probably to compensate for the reduction in gland development. However, sweating response to a pilocarpine injection in the hind paw was significantly decreased in the K5-Brn2 transgenic mouse compared with the wild-type. The paw epidermis was thicker in the K5-Brn2 transgenic mouse compared with the wild-type. Taken together, eccrine sweat gland development and sweat secretion were suppressed markedly in the K5-Brn2 transgenic mouse. These results may be associated with dominant development of the epidermis by Brn2 overexpression in the paw skin.
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Affiliation(s)
- Min Keun Chee
- Department of Anatomy, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Seong Kyeong Jo
- Department of Anatomy, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Kyung Cheol Sohn
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Chang Deok Kim
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Jeung-Hoon Lee
- Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, South Korea
| | - Young Ho Lee
- Department of Anatomy, College of Medicine, Chungnam National University, Daejeon, South Korea.
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37
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WNT10A mutation causes ectodermal dysplasia by impairing progenitor cell proliferation and KLF4-mediated differentiation. Nat Commun 2017; 8:15397. [PMID: 28589954 PMCID: PMC5467248 DOI: 10.1038/ncomms15397] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Accepted: 03/27/2017] [Indexed: 02/06/2023] Open
Abstract
Human WNT10A mutations are associated with developmental tooth abnormalities and adolescent onset of a broad range of ectodermal defects. Here we show that β-catenin pathway activity and adult epithelial progenitor proliferation are reduced in the absence of WNT10A, and identify Wnt-active self-renewing stem cells in affected tissues including hair follicles, sebaceous glands, taste buds, nails and sweat ducts. Human and mouse WNT10A mutant palmoplantar and tongue epithelia also display specific differentiation defects that are mimicked by loss of the transcription factor KLF4. We find that β-catenin interacts directly with region-specific LEF/TCF factors, and with KLF4 in differentiating, but not proliferating, cells to promote expression of specialized keratins required for normal tissue structure and integrity. Our data identify WNT10A as a critical ligand controlling adult epithelial proliferation and region-specific differentiation, and suggest downstream β-catenin pathway activation as a potential approach to ameliorate regenerative defects in WNT10A patients. Human WNT10A mutations are associated with dental defects and adult onset ectodermal dysplasia. Xu et al. show that WNT10A-activated ß-catenin plays dual roles in adult epithelial progenitor proliferation and differentiation by complexing with KLF4 in differentiating, but not proliferating, cells.
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38
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miRNAs Are Required for Postinduction Stage Sweat Gland Development. J Invest Dermatol 2017; 137:1571-1574. [PMID: 28286062 DOI: 10.1016/j.jid.2017.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 02/21/2017] [Accepted: 03/01/2017] [Indexed: 11/20/2022]
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39
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Sima J, Piao Y, Chen Y, Schlessinger D. Molecular dynamics of Dkk4 modulates Wnt action and regulates meibomian gland development. Development 2016; 143:4723-4735. [PMID: 27864382 DOI: 10.1242/dev.143909] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 11/06/2016] [Indexed: 01/04/2023]
Abstract
Secreted Dickkopf (Dkk) proteins are major Wnt pathway modulators during organ development. Dkk1 has been widely studied and acts as a general Wnt inhibitor. However, the molecular function of other Dkks remains largely unknown. Here, we show that Dkk4 selectively inhibits a subset of Wnts, but is further inactivated by proteolytic cleavage. Meibomian gland (MG) formation is employed as a model where Dkk4 and its Wnt targets are expressed. Skin-specific expression of Dkk4 arrests MG growth at early germ phase, which is similar to that observed in Eda-ablated Tabby mice. Consistent with transient Dkk4 action, intact Dkk4 inhibits MG extension but the cleaved form progressively increases during MG development with a concomitant upswing in Wnt activity. Furthermore, both Dkk4 and its receptor (and Wnt co-receptor) Lrp6 are direct Eda targets during MG induction. In cell and organotypic cultures, Dkk4 inhibition is eliminated by elevation of Lrp6. Also, Lrp6 upregulation restores MG formation in Tabby mice. Thus, the dynamic state of Dkk4 itself and its interaction with Lrp6 modulates Wnt function during MG development, with a novel limitation of Dkk4 action by proteolytic cleavage.
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Affiliation(s)
- Jian Sima
- Laboratory of Genetics and Genomics, NIA/NIH-IRP, 251 Bayview Blvd, room 10B014, Baltimore, MD 21224, USA
| | - Yulan Piao
- Laboratory of Genetics and Genomics, NIA/NIH-IRP, 251 Bayview Blvd, room 10B014, Baltimore, MD 21224, USA
| | - Yaohui Chen
- Laboratory of Genetics and Genomics, NIA/NIH-IRP, 251 Bayview Blvd, room 10B014, Baltimore, MD 21224, USA
| | - David Schlessinger
- Laboratory of Genetics and Genomics, NIA/NIH-IRP, 251 Bayview Blvd, room 10B014, Baltimore, MD 21224, USA
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40
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Liang H, Sun Q, Zhen Y, Li F, Xu Y, Liu Y, Zhang X, Qin M. The differentiation of amniotic fluid stem cells into sweat glandlike cells is enhanced by the presence of Sonic hedgehog in the conditioned medium. Exp Dermatol 2016; 25:714-20. [PMID: 27120089 DOI: 10.1111/exd.13062] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/25/2016] [Indexed: 11/30/2022]
Abstract
After patients suffer severe full-thickness burn injuries, the current treatments cannot lead to the complete self-regeneration of the sweat gland structure and function. Therefore, it is important to identify new methods for acquiring sufficient functional sweat gland cells to restore skin function. In this study, we induced CD117+ human amniotic fluid stem (hAFS) cells to differentiate into sweat glandlike (hAFS-SG) cells based on the use of conditioned medium (CM) from the human sweat gland (hSG) cells. Real-time PCR and immunofluorescent staining were used to confirm the expression of the sweat gland-related genes Ectodysplasin-A (EDA), Ectodysplasin-A receptor (EDAR), keratin 8 (K8) and carcino-embryonic antigen (CEA). Transmission electron microscopy analysis shows that microvilli, the cellular structures that are typical for hSG cells, can also be observed on the membrane of the hAFS-SG cells. Our test for the calcium response to acetylcholine (Ach) proved that hAFS-SG cells have the potential to respond to Ach in a manner similar to normal sweat glands. A three-dimensional culture is an effective approach that stimulates the hAFS-SG cells to form tubular structures and drives hAFS-SG cells to mature into higher stage. We also found that epidermal growth factor enhances the efficiency of differentiation and that Sonic hedgehog is an important factor of the CM that influences sweat gland differentiation. Our study provides the basis for further investigations into novel methods of inducing stem cells to differentiate into sweat glandlike cells.
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Affiliation(s)
- Hansi Liang
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China.,The Stem Cell and Biomedical Material Key Laboratory of Jiangsu Province (The State Key Laboratory Incubation Base), Soochow University, Suzhou, Jiangsu Province, China
| | - Qing Sun
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China.,The Stem Cell and Biomedical Material Key Laboratory of Jiangsu Province (The State Key Laboratory Incubation Base), Soochow University, Suzhou, Jiangsu Province, China
| | - Yunfang Zhen
- The Center of Diagnosis and Treatment for Children's Bone Diseases, Children's Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Fang Li
- The Stem Cell and Biomedical Material Key Laboratory of Jiangsu Province (The State Key Laboratory Incubation Base), Soochow University, Suzhou, Jiangsu Province, China.,Department of Human Anatomy, Histology and Embryology, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - YunYun Xu
- Institute of Pediatrics, Children's Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Yao Liu
- The Center of Diagnosis and Treatment for Children's Bone Diseases, Children's Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Xueguang Zhang
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China.,The Stem Cell and Biomedical Material Key Laboratory of Jiangsu Province (The State Key Laboratory Incubation Base), Soochow University, Suzhou, Jiangsu Province, China
| | - Mingde Qin
- The Stem Cell and Biomedical Material Key Laboratory of Jiangsu Province (The State Key Laboratory Incubation Base), Soochow University, Suzhou, Jiangsu Province, China
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41
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Huang Z, Zhen Y, Yin W, Ma Z, Zhang L. Shh promotes sweat gland cell maturation in three-dimensional culture. Cell Tissue Bank 2016; 17:317-25. [PMID: 26908022 PMCID: PMC4882370 DOI: 10.1007/s10561-016-9548-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 02/16/2016] [Indexed: 02/01/2023]
Abstract
Sweat gland (SG) cells forming SG tubule-like structures in 3D culture, this is one of the most important methods to identify the biological function of SG cells and stem cells-derived SG-like cells, but also the important way on research of SG regeneration in vitro. In this study, we seeded human fibroblasts and SG cells in gels and used immunohistochemistry to confirm whether SG tubule-like structures formed. Fibroblasts are necessary factor in the process of SG cells maturation and forming SG’s secretory region in 3D culture. Further experimentation revealed that Sonic hedgehog (Shh) was secreted by fibroblasts within the 3D culture. By adding Shh protein to 3D culture, there had more SG tubule-like structures formed. These results suggest that Shh is an important factor during the process of forming SG tubule-like structures in 3D cultures, and adding Shh recommbinant protein could promote SG cell maturation and enhance the efficiency of structure formation.
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Affiliation(s)
- Zhijian Huang
- Department of Burn and Plastic Surgery, Children's Hospital of Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Yunfang Zhen
- The Center of Diagnosis and Treatment for Children's Bone Diseases, Children's Hospital of Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Wei Yin
- Department of Burn and Plastic Surgery, Children's Hospital of Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Zhourui Ma
- Department of Burn and Plastic Surgery, Children's Hospital of Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Liya Zhang
- Department of Neurology, Children's Hospital of Soochow University, Suzhou, Jiangsu Province, People's Republic of China.
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42
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Voutilainen M, Lindfors PH, Trela E, Lönnblad D, Shirokova V, Elo T, Rysti E, Schmidt-Ullrich R, Schneider P, Mikkola ML. Ectodysplasin/NF-κB Promotes Mammary Cell Fate via Wnt/β-catenin Pathway. PLoS Genet 2015; 11:e1005676. [PMID: 26581094 PMCID: PMC4651331 DOI: 10.1371/journal.pgen.1005676] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 10/26/2015] [Indexed: 11/18/2022] Open
Abstract
Mammary gland development commences during embryogenesis with the establishment of a species typical number of mammary primordia on each flank of the embryo. It is thought that mammary cell fate can only be induced along the mammary line, a narrow region of the ventro-lateral skin running from the axilla to the groin. Ectodysplasin (Eda) is a tumor necrosis factor family ligand that regulates morphogenesis of several ectodermal appendages. We have previously shown that transgenic overexpression of Eda (K14-Eda mice) induces formation of supernumerary mammary placodes along the mammary line. Here, we investigate in more detail the role of Eda and its downstream mediator transcription factor NF-κB in mammary cell fate specification. We report that K14-Eda mice harbor accessory mammary glands also in the neck region indicating wider epidermal cell plasticity that previously appreciated. We show that even though NF-κB is not required for formation of endogenous mammary placodes, it is indispensable for the ability of Eda to induce supernumerary placodes. A genome-wide profiling of Eda-induced genes in mammary buds identified several Wnt pathway components as potential transcriptional targets of Eda. Using an ex vivo culture system, we show that suppression of canonical Wnt signalling leads to a dose-dependent inhibition of supernumerary placodes in K14-Eda tissue explants. Mammary glands are the most characteristic feature of all mammals. The successful growth and function of the mammary glands is vital for the survival of offspring since the secreted milk is the main nutritional source of a new-born. Ectodysplasin (Eda) is a signaling molecule that regulates the formation of skin appendages such as hair, teeth, feathers, scales, and several glands in all vertebrates studied so far. In humans, mutations in the EDA gene cause a congenital disorder characterized by sparse hair, missing teeth, and defects in exocrine glands including the breast. We have previously shown that excess Eda induces formation of supernumerary mammary glands in mice. Here, we show that Eda leads to extra mammary gland formation also in the neck, a region previously not thought to harbor capacity to support mammary development. Using Eda loss- and gain-of-function mouse models and transcriptional profiling we identify the downstream mediators of Eda. The presence of extra nipples is a fairly common developmental abnormality in humans. We suggest that misregulation of Eda or its effectors might account for some of these malformations. Further, the number and location of the mammary glands vary widely between different species. Tinkering with the Eda pathway activity could provide an evolutionary means to modulate the number of mammary glands.
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Affiliation(s)
- Maria Voutilainen
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Päivi H. Lindfors
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Ewelina Trela
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Darielle Lönnblad
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Vera Shirokova
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Teresa Elo
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Elisa Rysti
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | | | - Pascal Schneider
- Department of Biochemistry, University of Lausanne, Epalinges, Switzerland
| | - Marja L. Mikkola
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
- * E-mail:
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43
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Abstract
Among the unique features of humans, one of the most salient is the ability to effectively cool the body during extreme prolonged activity through the evapotranspiration of water on the skin's surface. The evolution of this novel physiological ability required a dramatic increase in the density and distribution of eccrine sweat glands relative to other mammals and a concomitant reduction of body hair cover. Elucidation of the genetic underpinnings for these adaptive changes is confounded by a lack of knowledge about how eccrine gland fate and density are specified during development. Moreover, although reciprocal changes in hair cover and eccrine gland density are required for efficient thermoregulation, it is unclear if these changes are linked by a common genetic regulation. To identify pathways controlling the relative patterning of eccrine glands and hair follicles, we exploited natural variation in the density of these organs between different strains of mice. Quantitative trait locus mapping identified a large region on mouse Chromosome 1 that controls both hair and eccrine gland densities. Differential and allelic expression analysis of the genes within this interval coupled with subsequent functional studies demonstrated that the level of En1 activity directs the relative numbers of eccrine glands and hair follicles. These findings implicate En1 as a newly identified and reciprocal determinant of hair follicle and eccrine gland density and identify a pathway that could have contributed to the evolution of the unique features of human skin.
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44
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Cui CY, Schlessinger D. Eccrine sweat gland development and sweat secretion. Exp Dermatol 2015; 24:644-50. [PMID: 26014472 DOI: 10.1111/exd.12773] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2015] [Indexed: 12/21/2022]
Abstract
Eccrine sweat glands help to maintain homoeostasis, primarily by stabilizing body temperature. Derived from embryonic ectoderm, millions of eccrine glands are distributed across human skin and secrete litres of sweat per day. Their easy accessibility has facilitated the start of analyses of their development and function. Mouse genetic models find sweat gland development regulated sequentially by Wnt, Eda and Shh pathways, although precise subpathways and additional regulators require further elucidation. Mature glands have two secretory cell types, clear and dark cells, whose comparative development and functional interactions remain largely unknown. Clear cells have long been known as the major secretory cells, but recent studies suggest that dark cells are also indispensable for sweat secretion. Dark cell-specific Foxa1 expression was shown to regulate a Ca(2+) -dependent Best2 anion channel that is the candidate driver for the required ion currents. Overall, it was shown that cholinergic impulses trigger sweat secretion in mature glands through second messengers - for example InsP3 and Ca(2+) - and downstream ion channels/transporters in the framework of a Na(+) -K(+) -Cl(-) cotransporter model. Notably, the microenvironment surrounding secretory cells, including acid-base balance, was implicated to be important for proper sweat secretion, which requires further clarification. Furthermore, multiple ion channels have been shown to be expressed in clear and dark cells, but the degree to which various ion channels function redundantly or indispensably also remains to be determined.
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Affiliation(s)
- Chang-Yi Cui
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - David Schlessinger
- Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
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