1
|
Pazzaglia I, Mercati F, Antonini M, Capomaccio S, Cappelli K, Dall'Aglio C, La Terza A, Mozzicafreddo M, Nocelli C, Pallotti S, Pediconi D, Renieri C. PDGFA in Cashmere Goat: A Motivation for the Hair Follicle Stem Cells to Activate. Animals (Basel) 2019; 9:E38. [PMID: 30695990 PMCID: PMC6407032 DOI: 10.3390/ani9020038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 01/18/2019] [Accepted: 01/24/2019] [Indexed: 12/31/2022] Open
Abstract
The cashmere hair follicle (HF) perpetually goes through cycles of growth, involution and rest. The photoperiod is the main factor in the control of seasonal coat change in cashmere goats while stem cells play a crucial role in the HF growth. Several factors, including Platelet-Derived Growth Factor A (PDGFA), Bone Morphogenetic Protein 2 (BMP2) and Lim-Homeobox gene 2 (LHX2) are implicated in HF morphogenesis and cycle. In this work, the mentioned molecules were investigated to evaluate their role in follicular cycle activation. The study was performed on skin samples collected at different periods of HF cycle and the molecular expression of PDGFA, BMP2 and LHX2 was evaluated by Real-Time PCR (qPCR) at each time point. Since PDGFA showed the most variation, the goat PDGFA gene was sequenced and the protein localization was investigated by immunohistochemistry together with PDGF receptor α (PDGFRα). PDGFA immunostaining was observed in the basal layer of the HF outer root sheath and the immunoreaction appeared stronger in the regressive HFs compared to those in the anagen phase according to qPCR analysis. PDGFRα was observed in the HF epithelium, proving the effect of PDGFA on the follicular structure. The data obtained suggest that PDGFA and BMP2 are both implicated in HF cycle in goat. In particular, PDGFA secreted by the HF is involved in the anagen activation.
Collapse
Affiliation(s)
- Irene Pazzaglia
- School of Bioscience and Veterinary Medicine, University of Camerino, Via Pontoni 5, 62032 Camerino, Italy.
| | - Francesca Mercati
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy.
| | - Marco Antonini
- Italian National Agency for New Technology, Energy and Sustainable Economic Development, ENEA CR Casaccia-SSPT BIOAG Probio, S.M. di Galeria, 00123 Roma, Italy.
| | - Stefano Capomaccio
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy.
| | - Katia Cappelli
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy.
| | - Cecilia Dall'Aglio
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy.
| | - Antonietta La Terza
- School of Bioscience and Veterinary Medicine, University of Camerino, Via Pontoni 5, 62032 Camerino, Italy.
| | - Matteo Mozzicafreddo
- School of Bioscience and Veterinary Medicine, University of Camerino, Via Pontoni 5, 62032 Camerino, Italy.
| | - Cristina Nocelli
- School of Bioscience and Veterinary Medicine, University of Camerino, Via Pontoni 5, 62032 Camerino, Italy.
| | - Stefano Pallotti
- School of Bioscience and Veterinary Medicine, University of Camerino, Via Pontoni 5, 62032 Camerino, Italy.
| | - Dario Pediconi
- School of Bioscience and Veterinary Medicine, University of Camerino, Via Pontoni 5, 62032 Camerino, Italy.
| | - Carlo Renieri
- School of Pharmacy, University of Camerino, Via Gentile III da Varano, 62032 Camerino, Italy.
| |
Collapse
|
2
|
Zhao A, Yang L, Ma K, Sun M, Li L, Huang J, Li Y, Zhang C, Li H, Fu X. Overexpression of cyclin D1 induces the reprogramming of differentiated epidermal cells into stem cell-like cells. Cell Cycle 2016; 15:644-53. [PMID: 26890246 PMCID: PMC4845944 DOI: 10.1080/15384101.2016.1146838] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 01/04/2016] [Accepted: 01/20/2016] [Indexed: 02/05/2023] Open
Abstract
It has been reported that Wnt/β-catenin is critical for dedifferentiation of differentiated epidermal cells. Cyclin D1 (CCND1) is a β-catenin target gene. In this study, we provide evidence that overexpression of CCND1 induces reprogramming of epidermal cells into stem cell-like cells. After introducing CCND1 gene into differentiated epidermal cells, we found that the large flat-shaped cells with a small nuclear-cytoplasmic ratio changed into small round-shaped cells with a large nuclear-cytoplasmic ratio. The expressions of CK10, β1-integrin, Oct4 and Nanog in CCND1 induced cells were remarkably higher than those in the control group (P < 0.01). In addition, the induced cells exhibited a high colony-forming ability and a long-term proliferative potential. When the induced cells were implanted into a wound of laboratory animal model, the wound healing was accelerated. These results suggested that overexpression of CCND1 induced the reprogramming of differentiated epidermal cells into stem cell-like cells. This study may also offer a new approach to yield epidermal stem cells for wound repair and regeneration.
Collapse
Affiliation(s)
- Along Zhao
- Key Research Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, P.R. China
- Tianjin Medical University, Tianjin, PR China
| | - Leilei Yang
- Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, P.R. China
| | - Kui Ma
- Key Research Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, P.R. China
| | - Mengli Sun
- Key Research Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, P.R. China
| | - Lei Li
- Key Research Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, P.R. China
| | - Jin Huang
- Key Research Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, P.R. China
| | - Yang Li
- Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, P.R. China
| | - Cuiping Zhang
- Key Research Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, P.R. China
- CONTACT Cuiping Zhang Research Laboratory of Tissue Repair and Regeneration, First Hospital Affiliated to the Chinese PLA General Hospital, 51 Fucheng Road, Haidian District, Beijing, P.R. China
| | - Haihong Li
- Burn and Plastic Surgery, The Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong Province, P.R. China
- Haihong Li Burn and Plastic Surgery, The Second Affiliated Hospital, Shantou University Medical College, North Dongxia Road, Shantou, Guangdong Province, P.R. China, 515041
| | - Xiaobing Fu
- Key Research Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, P.R. China
- Xiaobing Fu Research Laboratory of Tissue Repair and Regeneration, First Hospital Affiliated to the Chinese PLA General Hospital, 51 Fucheng Road, Haidian District, Beijing, P.R. China
| |
Collapse
|
3
|
Cheng P, Sun X, Yin D, Xu F, Yang K, Qin L, Dong Y, Guo F, Chen A, Zhang W, Huang H. Nanog down-regulates the Wnt signaling pathway via β-catenin phosphorylation during epidermal stem cell proliferation and differentiation. Cell Biosci 2015; 5:5. [PMID: 25973172 PMCID: PMC4429823 DOI: 10.1186/2045-3701-5-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 01/16/2015] [Indexed: 11/18/2022] Open
Abstract
Background Skin tissue homeostasis is maintained by a balance between the proliferation and differentiation of epidermal stem cells (EpSCs). EpSC proliferation and differentiation are complex processes regulated by many factors and signaling pathways. This study aimed to explore the connection between the Nanog and the Wnt/β-catenin pathway in the proliferation and differentiation of EpSCs. Results Our results demonstrated that during the study period, EpSC underwent differentiation when incubated in the presence neuropeptide substance P (SP), there was an opposing expression trend of Nanog and β-catenin after SP treatment, which could be antagonized by the Wnt antagonist, Dkk-1. The transduced EpSCs had a greater proliferative ability than the SP treatment group and they did not undergo differentiation upon SP treatment. More important, β-catenin expression was down-regulated but phosphorylated β-catenin expression and phosphorylated GSK-3β expression was up-regulated upon Nanog overexpression. Conclusions These results strongly suggest that Nanog plays an important role in maintaining the proliferation and differentiation homeostasis of EpSCs by promoting β-catenin phosphorylation via GSK-3β to inhibit the activity of the Wnt/β-catenin signaling pathway. This is important for precise regulation of proliferation and differentiation of EpSC in the application of tissue engineering.
Collapse
Affiliation(s)
- Peng Cheng
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| | - Xuying Sun
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China.,Biological engineering and regenerative medicine center,Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| | - Delong Yin
- Department of Orthopedics, The Third Hospital Affiliated to Guangzhou Medical University, Guangzhou, 510150 P.R. China
| | - Fei Xu
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| | - Kaixiang Yang
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| | - Liang Qin
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| | - Yonghui Dong
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| | - Fengjing Guo
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| | - Anmin Chen
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| | - Weikai Zhang
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| | - Hui Huang
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 P.R. China
| |
Collapse
|
4
|
Peng LH, Mao ZY, Qi XT, Chen X, Li N, Tabata Y, Gao JQ. Transplantation of bone-marrow-derived mesenchymal and epidermal stem cells contribute to wound healing with different regenerative features. Cell Tissue Res 2013; 352:573-83. [DOI: 10.1007/s00441-013-1609-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Accepted: 03/04/2013] [Indexed: 01/19/2023]
|
5
|
Zhang C, Chen P, Fei Y, Liu B, Ma K, Fu X, Zhao Z, Sun T, Sheng Z. Wnt/β-catenin signaling is critical for dedifferentiation of aged epidermal cells in vivo and in vitro. Aging Cell 2012; 11:14-23. [PMID: 21967252 DOI: 10.1111/j.1474-9726.2011.00753.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Aged epidermal cells have the capacity to dedifferentiate into stem cell-like cells. However, the signals that regulate the dedifferentiation of aged epidermal cells remain unclear. Here, we provide evidence that Wnt/β-catenin is critical for aged epidermal cell dedifferentiation in vivo and in vitro. Some aged epidermal cells in human ultrathin epidermal sheets lacking basal stem cells transplanted onto wounds dedifferentiated into stem cell-like cells that were positive for CK19 and β1 integrin but negative for CK10. In addition, Wnt/β-catenin pathway was activated during this process. There was increased expression of Wnt-1, Wnt-4, Wnt-7a, β-catenin, cyclin D1, and c-myc. Secreted frizzled-related protein 1, a Wnt/β-catenin pathway inhibitor, blocked dedifferentiation in vivo. Then, the activator, a highly specific glycogen synthase kinase (GSK)-3β inhibitor, of Wnt/β-catenin pathway was added to the culture medium of aged epidermal cells. Surprisingly, we found that the activator induced higher expression of CK19, β1 integrin, Oct4, and Nanog proteins. The induced aged epidermal cells exhibited high colony-forming efficiency, long-term proliferative potential and could regenerate a skin equivalent (as do epidermal stem cells). These results suggested that activation of Wnt/β-catenin pathway induced the dedifferentiation of aged epidermal cells, which suggest a new approach to generate epidermal stem cell-like cells.
Collapse
Affiliation(s)
- Cuiping Zhang
- Wound Healing and Cell Biology Laboratory, Burns Institute, The First Affiliated Hospital, General Hospital of PLA, Beijing, China
| | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Zhao Z, Zhang C, Fu X, Yang R, Peng C, Gu T, Sui Z, Wang C, Liu C. Differentiated Epidermal Cells Regain the Ability to Regenerate a Skin Equivalent by Increasing the Level of �-Catenin in the Cells. Cells Tissues Organs 2012; 196:353-61. [DOI: 10.1159/000335474] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/28/2011] [Indexed: 01/21/2023] Open
|
7
|
Lu R, Zhang X, Huang D, Huang B, Gao N, Wang Z, Ge J. Conjunctival reconstruction with progenitor cell-derived autologous epidermal sheets in rhesus monkey. PLoS One 2011; 6:e25713. [PMID: 22096478 PMCID: PMC3214019 DOI: 10.1371/journal.pone.0025713] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Accepted: 09/08/2011] [Indexed: 01/03/2023] Open
Abstract
Severe ocular surface diseases are some of the most challenging problems that the clinician faces today. Conventional management is generally unsatisfactory, and the long-term ocular consequences of these conditions are devastating. It is significantly important to find a substitute for conjunctival epithelial cells. This study was to explore the possibility of progenitor cell-derived epidermal sheets on denuded amniotic membrane to reconstruct ocular surface of conjunctiva damaged monkeys. We isolated epidermal progenitor cells of rhesus monkeys by type IV collagen adhesion, and then expanded progenitor cell-derived epidermal sheets on denuded amniotic membrane ex vivo. At 3 weeks after the conjunctiva injury, the damaged ocular surface of four monkeys was surgically reconstructed by transplanting the autologous cultivated epidermal progenitor cells. At 2 weeks after surgery, transplants were removed and examined with Hematoxylin-eosin staining, Periodic acid Schiff staining, immunofluorescent staining, scanning and transmission electron microscopy. Histological examination of transplanted sheets revealed that the cell sheets were healthy alive, adhered well to the denuded amniotic membrane, and had several layers of epithelial cells. Electron microscopy showed that the epithelial cells were very similar in appearance to those of normal conjunctival epithelium, even without goblet cell detected. Epithelial cells of transplants had numerous desmosomal junctions and were attached to the amniotic membrane with hemidesmosomes. Immunohistochemistry confirmed the presence of the conjunctival specific markers, mucin 4 and keratin 4, in the transplanted epidermal progenitor cells. In conclusion, our present study successfully reconstructed conjunctiva with autologous transplantation of progenitor cell-derived epidermal sheets on denuded AM in conjunctival damaged monkeys, which is the first step toward assessing the use of autologous transplantation of progenitor cells of nonocular surface origin. Epidermal progenitor cells could be provided as a new substitute for conjunctival epithelial cells to overcome the problems of autologous conjunctiva shortage.
Collapse
Affiliation(s)
- Rong Lu
- State Key laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, China
| | - Xinchun Zhang
- Department of Prosthodontics, Hospital of Stomatology, Guanghua College of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Danping Huang
- State Key laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, China
| | - Bing Huang
- State Key laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, China
| | - Nan Gao
- State Key laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, China
| | - Zhichong Wang
- State Key laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, China
| | - Jian Ge
- State Key laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, China
- * E-mail:
| |
Collapse
|
8
|
Reiisi S, Esmaeili F, Shirazi A. Isolation, culture and identification of epidermal stem cells from newborn mouse skin. In Vitro Cell Dev Biol Anim 2011; 46:54-9. [PMID: 19915936 DOI: 10.1007/s11626-009-9245-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2009] [Accepted: 09/30/2009] [Indexed: 12/23/2022]
Abstract
In healthy individuals, skin integrity is maintained by epidermal stem cells which self-renew and generate daughter cells that undergo terminal differentiation. Epidermal stem cells represent a promising source of stem cells, and their culture has great potential in scientific research and clinical application. However, no single method has been universally adopted for identifying and isolating epidermal stem cells. Here, we reported the isolation and characterization of putative epidermal stem cells from newborn mouse skin. The keratinocytes were separated enzymatically. Putative epidermal stem cells were selected by rapid adherence on a composite matrix made of type I collagen and fibronectin. Unattached cells were discarded after 10 min, and the attached cells were cultured in a defined culture medium. The isolated cells showed the typical epidermal stem cell morphology. Immunofluorescence indicated that the cells were strongly stained for β1 integrin family of extracellular matrix receptors. In conclusion, mouse putative epidermal stem cells were successfully isolated from newborn mouse epidermis on the basis of high rapid adhesion to extracellular matrix proteins and cultured in vitro.
Collapse
Affiliation(s)
- Somayeh Reiisi
- Department of Biology, Faculty of Basic Sciences, University of Shahrekord, Shahrekord, Iran
| | | | | |
Collapse
|
9
|
Ruetze M, Dunckelmann K, Schade A, Reuschlein K, Mielke H, Weise JM, Gallinat S, Wenck H, Knott A. Damage at the root of cell renewal--UV sensitivity of human epidermal stem cells. J Dermatol Sci 2011; 64:16-22. [PMID: 21862292 DOI: 10.1016/j.jdermsci.2011.06.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 05/16/2011] [Accepted: 06/19/2011] [Indexed: 12/18/2022]
Abstract
BACKGROUND The epidermis harbors adult stem cells that reside in the basal layer and ensure the continuous maintenance of tissue homeostasis. Various studies imply that stem cells generally possess specific defense mechanisms against several forms of exogenous stress factors. As sun exposition is the most prevalent impact on human skin, this feature would be of particular importance in terms of sensitivity to UV-induced DNA damage. OBJECTIVE To investigate whether human epidermal stem cells are susceptible to UV-induced DNA damage and subsequent functional impairment. METHODS A method to isolate human epidermal stem cells from suction blister epidermis was established and validated. Volunteers were treated with solar-simulated irradiation on test areas of the forearm and stem cells were isolated from suction blister material of this region. DNA damage was analyzed by staining for cyclobutane thymidine dimers. The functional consequences of UV-induced damages were assessed by colony forming efficiency assays and gene expression analyses. RESULTS Compared to an unirradiated control, stem cells isolated from areas that were exposed to solar-simulated radiation showed significantly more DNA lesions. Although the number of stem cells was not reduced by this treatment, a functional impairment of stem cells could be shown by reduced colony forming efficiency and altered gene expression of stem cell markers. CONCLUSIONS Despite their essential role in skin maintenance, epidermal stem cells are sensitive to physiological doses of UV irradiation in vivo.
Collapse
Affiliation(s)
- Martin Ruetze
- Beiersdorf AG, R&D, Skin Research Center, Unnastr. 48, 20253 Hamburg, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Flow cytometry-based characterization of label-retaining stem cells following transplacental BrdU labelling. Cell Biol Int 2010. [DOI: 10.1042/cb20100335] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
11
|
Zhang C, Fu X, Chen P, Bao X, Li F, Sun X, Lei Y, Cai S, Sun T, Sheng Z. Dedifferentiation derived cells exhibit phenotypic and functional characteristics of epidermal stem cells. J Cell Mol Med 2010; 14:1135-45. [PMID: 19426155 PMCID: PMC3822750 DOI: 10.1111/j.1582-4934.2009.00765.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Differentiated epidermal cells can dedifferentiate into stem cells or stem cell-like cells in vivo. In this study, we report the isolation and characterization of dedifferentiation-derived cells. Epidermal sheets eliminated of basal stem cells were transplanted onto the skin wounds in 47 nude athymic (BALB/c-nu/nu) mice. After 5 days, cells negative for CK10 but positive for CK19 and β1-integrin emerged at the wound-neighbouring side of the epidermal sheets. Furthermore, the percentages of CK19 and β1-integrin+ cells detected by flow cytometric analysis were increased after grafting (P < 0.01) and CK10+ cells in grafted sheets decreased (P < 0.01). Then we isolated these cells on the basis of rapid adhesion to type IV collagen and found that there were 4.56% adhering cells (dedifferentiation-derived cells) in the grafting group within 10 min. The in vitro phenotypic assays showed that the expressions of CK19, β1-integrin, Oct4 and Nanog in dedifferentiation-derived cells were remarkably higher than those in the control group (differentiated epidermal cells) (P < 0.01). In addition, the results of the functional investigation of dedifferentiation-derived cells demonstrated: (1) the numbers of colonies consisting of 5–10 cells and greater than 10 cells were increased 5.9-fold and 6.7-fold, respectively, as compared with that in the control (P < 0.01); (2) more cells were in S phase and G2/M phase of the cell cycle (proliferation index values were 21.02% in control group, 45.08% in group of dedifferentiation); (3) the total days of culture (28 days versus 130 days), the passage number of cells (3 passages versus 20 passages) and assumptive total cell output (1 × 105 cells versus 1 × 1012 cells) were all significantly increased and (4) dedifferentiation-derived cells, as well as epidermal stem cells, were capable of regenerating a skin equivalent, but differentiated epidermal cells could not. These results suggested that the characteristics of dedifferentiation-derived cells cultured in vitro were similar to epidermal stem cells. This study may also offer a new approach to yield epidermal stem cells for wound repair and regeneration.
Collapse
Affiliation(s)
- Cuiping Zhang
- Wound Healing and Cell Biology Laboratory, Burns Institute, The First Affiliated Hospital, General Hospital of PLA, Trauma Center of Postgraduate Medical College, Beijing, PR China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Tao Q, Qiao B, Lv B, Zheng C, Chen Z, Huang H. p63 and its isoforms as markers of rat oral mucosa epidermal stem cellsin vitro. Cell Biochem Funct 2009; 27:535-41. [DOI: 10.1002/cbf.1612] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|