151
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Saleh FY, Awad SS, Nasif GA, Halim C. Epithelial expression of cytokeratins 15 and 19 in vitiligo. J Cosmet Dermatol 2016; 15:312-317. [PMID: 27139521 DOI: 10.1111/jocd.12223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/28/2016] [Indexed: 12/01/2022]
Abstract
BACKGROUND Cytokeratins (CK) belong to the family of intermediate filament proteins, and among them specific epithelial keratins are considered markers for stem cells activation. OBJECTIVES This study aims to investigate the expression of CK15 and CK19 as possible stem cell markers in vitiligo during phototherapy. METHODS The study was conducted on vitiligo patients receiving narrow-band ultraviolet therapy. Immunohistochemical staining for CK15 and CK19 was carried out, and clinical follow-up continued for 4 weeks. RESULTS Of 28 patients, CK15 expression was demonstrated in 17 cases (61%) while CK19 expression was demonstrated in 11 cases (39%). Cells expressing positive staining were demonstrated in follicular and interfollicular epithelium. Expression was clearly demonstrated in patients younger than 20 years old, with shorter disease duration, with disease stability, and with normally pigmented hairs. Expression of cytokeratins was significantly correlated to improvement of vitiligo lesions. CONCLUSION CK15 and CK19 are expressed in vitiligo during UV repigmentation in the follicular and interfollicular epithelium. This expression of cytokeratins was significantly correlated to improvement and can be considered valuable tool to monitor stem cells stimulation for the sake of the repigmentation process in vitiligo.
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Affiliation(s)
- Fatma Y Saleh
- Department of Dermatology, STDs and Andrology, Faculty of Medicine, Minia University, Minia, Egypt
| | - Sherif S Awad
- Department of Dermatology, STDs and Andrology, Faculty of Medicine, Minia University, Minia, Egypt
| | - Ghada A Nasif
- Department of Dermatology, STDs and Andrology, Faculty of Medicine, Minia University, Minia, Egypt
| | - Christein Halim
- Department of Dermatology, STDs and Andrology, Faculty of Medicine, Minia University, Minia, Egypt
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152
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Purba TS, Haslam IS, Shahmalak A, Bhogal RK, Paus R. Mapping the expression of epithelial hair follicle stem cell-related transcription factors LHX2 and SOX9 in the human hair follicle. Exp Dermatol 2016; 24:462-7. [PMID: 25808706 DOI: 10.1111/exd.12700] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/17/2015] [Indexed: 01/02/2023]
Abstract
In the murine hair follicle (HF), the transcription factors LHX2 and SOX9 are implicated in epithelial hair follicle stem cell (eHFSC) self-renewal and the maintenance of eHFSC niche characteristics. However, the exact expression patterns of LHX2 and SOX9 in the human HF are unclear. Therefore, we have quantitatively mapped the localisation of known human eHFSC markers keratin 15 (K15) and keratin 19 (K19) in the outer root sheath (ORS) of male occipital scalp anagen HFs and related this to the localisation of LHX2 and SOX9 protein expression. As expected, K15(+) and K19(+) cells represented two distinct progenitor cell populations in the bulge and in the proximal bulb ORS (pbORS). Interestingly, cell fluorescence for K19 was significantly stronger within the pbORS versus the bulge, and vice versa for K15, describing a hitherto unrecognised differential expression pattern. LHX2 and SOX9 expressing cells were distributed throughout the ORS, including the bulge, but were not restricted to it. SOX9 expression was most prominent in the ORS immediately below the human bulge, whereas LHX2(+) cells were similarly distributed between the sub-bulge and pbORS, that is compartments not enriched with quiescent eHFSCs. During catagen development, the intensity of LHX2 and SOX9 protein expression increased in the proximal HF epithelium. Double immunostaining showed that the majority of SOX9(+) cells in the human anagen HF epithelium did not co-express K15, K19 or LHX2. This expression profile suggests that LHX2 and SOX9 highlight distinct epithelial progenitor cell populations, in addition to K15(+) or K19(+) cells, that could play an important role in the maintenance of the human HF epithelium.
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Affiliation(s)
- Talveen S Purba
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK
| | - Iain S Haslam
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK
| | | | | | - Ralf Paus
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK.,Department of Dermatology, University of Münster, Münster, Germany
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153
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154
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Terada M, Seki M, Takahashi R, Yamada S, Higashibata A, Majima HJ, Sudoh M, Mukai C, Ishioka N. Effects of a Closed Space Environment on Gene Expression in Hair Follicles of Astronauts in the International Space Station. PLoS One 2016; 11:e0150801. [PMID: 27029003 PMCID: PMC4814050 DOI: 10.1371/journal.pone.0150801] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 02/19/2016] [Indexed: 11/24/2022] Open
Abstract
Adaptation to the space environment can sometimes pose physiological problems to International Space Station (ISS) astronauts after their return to earth. Therefore, it is important to develop healthcare technologies for astronauts. In this study, we examined the feasibility of using hair follicles, a readily obtained sample, to assess gene expression changes in response to spaceflight adaptation. In order to investigate the gene expression changes in human hair follicles during spaceflight, hair follicles of 10 astronauts were analyzed by microarray and real time qPCR analyses. We found that spaceflight alters human hair follicle gene expression. The degree of changes in gene expression was found to vary among individuals. In some astronauts, genes related to hair growth such as FGF18, ANGPTL7 and COMP were upregulated during flight, suggesting that spaceflight inhibits cell proliferation in hair follicles.
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Affiliation(s)
- Masahiro Terada
- Divison of Aerospace Medicine, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
- Space Biosciences Division, NASA Ames Research Center, Moffett Field, California, United States of America
- * E-mail:
| | - Masaya Seki
- Advanced Engineering Services Co., Ltd., Takezono, Tsukuba City, Ibaraki, Japan
| | - Rika Takahashi
- Advanced Engineering Services Co., Ltd., Takezono, Tsukuba City, Ibaraki, Japan
| | - Shin Yamada
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
| | - Akira Higashibata
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
- Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima City, Kagoshima, Japan
| | - Hideyuki J. Majima
- Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima City, Kagoshima, Japan
| | - Masamichi Sudoh
- Divison of Aerospace Medicine, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
| | - Chiaki Mukai
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
| | - Noriaki Ishioka
- Japan Aerospace Exploration Agency, Tsukuba City, Ibaraki, Japan
- Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima City, Kagoshima, Japan
- Institute of Space and Astronautical Science, Sagamihara, Kanagawa, Japan
- Department of Space and Astronautical Science, School of Physical Sciences, SOKENDAI (The Graduate University for Advanced Studies), Sagamihara, Kanagawa, Japan
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155
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Decoction and Fermentation of Selected Medicinal Herbs Promote Hair Regrowth by Inducing Hair Follicle Growth in Conjunction with Wnts Signaling. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:4541580. [PMID: 27110266 PMCID: PMC4823488 DOI: 10.1155/2016/4541580] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 01/25/2016] [Accepted: 02/07/2016] [Indexed: 02/06/2023]
Abstract
It is well recognized that regulating the hair follicle cycle in association with Wnt signaling is one of the most interesting targets for promoting hair regrowth. In this study, we examined whether selected herbal medicines processed by decoction and fermentation promote hair growth by upregulating the number and size of hair follicles and Wnt signaling, including activation of β-catenin and Akt in telogen-synchronized C57BL/6N mice. The results revealed that the fermented extract after decoction (FDE) more effectively promoted hair growth than that of a nonfermented extract (DE). Notably, FDE effectively enhanced formation of hair follicles with clearer differentiation between the inner and outer root sheath, which is observed during the anagen phase. Mechanistic evidence was found for increased β-catenin and Akt phosphorylation levels in dorsal skin tissue along with elevated expression of hair regrowth-related genes, such as Wnt3/10a/10b, Lef1, and fibroblast growth factor 7. In conclusion, our findings suggest that FDE plays an important role in regulating the hair cycle by increasing expression of hair regrowth-related genes and activating downstream Wnt signaling targets.
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156
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Pringle S, Maimets M, van der Zwaag M, Stokman MA, van Gosliga D, Zwart E, Witjes MJ, de Haan G, van Os R, Coppes RP. Human Salivary Gland Stem Cells Functionally Restore Radiation Damaged Salivary Glands. Stem Cells 2016; 34:640-52. [DOI: 10.1002/stem.2278] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 10/19/2015] [Accepted: 10/25/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Sarah Pringle
- Department of Cell Biology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
- Department of Radiation Oncology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
| | - Martti Maimets
- Department of Cell Biology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
- Department of Radiation Oncology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
| | - Marianne van der Zwaag
- Department of Cell Biology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
| | - Monique A. Stokman
- Department of Radiation Oncology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
- Department of Oral & Maxillofacial Surgery; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
| | - Djoke van Gosliga
- Department of Cell Biology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
- Department of Radiation Oncology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
| | - Erik Zwart
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
| | - Max J.H. Witjes
- Department of Oral & Maxillofacial Surgery; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
| | - Gerald de Haan
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
| | - Ronald van Os
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
| | - Rob P. Coppes
- Department of Cell Biology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
- Department of Radiation Oncology; University of Groningen, University Medical Centrum Groningen; Groningen The Netherlands
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157
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Zhang Y, Strehin I, Bedelbaeva K, Gourevitch D, Clark L, Leferovich J, Messersmith PB, Heber-Katz E. Drug-induced regeneration in adult mice. Sci Transl Med 2016; 7:290ra92. [PMID: 26041709 DOI: 10.1126/scitranslmed.3010228] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Whereas amphibians regenerate lost appendages spontaneously, mammals generally form scars over the injury site through the process of wound repair. The MRL mouse strain is an exception among mammals because it shows a spontaneous regenerative healing trait and so can be used to investigate proregenerative interventions in mammals. We report that hypoxia-inducible factor 1α (HIF-1α) is a central molecule in the process of regeneration in adult MRL mice. The degradation of HIF-1α protein, which occurs under normoxic conditions, is mediated by prolyl hydroxylases (PHDs). We used the drug 1,4-dihydrophenonthrolin-4-one-3-carboxylic acid (1,4-DPCA), a PHD inhibitor, to stabilize constitutive expression of HIF-1α protein. A locally injectable hydrogel containing 1,4-DPCA was designed to achieve controlled delivery of the drug over 4 to 10 days. Subcutaneous injection of the 1,4-DPCA/hydrogel into Swiss Webster mice that do not show a regenerative phenotype increased stable expression of HIF-1α protein over 5 days, providing a functional measure of drug release in vivo. Multiple peripheral subcutaneous injections of the 1,4-DPCA/hydrogel over a 10-day period led to regenerative wound healing in Swiss Webster mice after ear hole punch injury. Increased expression of the HIF-1α protein may provide a starting point for future studies on regeneration in mammals.
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Affiliation(s)
- Yong Zhang
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA 19104, USA
| | - Iossif Strehin
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Khamilia Bedelbaeva
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA 19104, USA
| | - Dmitri Gourevitch
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA 19104, USA
| | - Lise Clark
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA 19104, USA
| | - John Leferovich
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA 19104, USA
| | - Phillip B Messersmith
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Ellen Heber-Katz
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA 19104, USA.
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158
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Axin2 marks quiescent hair follicle bulge stem cells that are maintained by autocrine Wnt/β-catenin signaling. Proc Natl Acad Sci U S A 2016; 113:E1498-505. [PMID: 26903625 DOI: 10.1073/pnas.1601599113] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
How stem cells maintain their identity and potency as tissues change during growth is not well understood. In mammalian hair, it is unclear how hair follicle stem cells can enter an extended period of quiescence during the resting phase but retain stem cell potential and be subsequently activated for growth. Here, we use lineage tracing and gene expression mapping to show that the Wnt target gene Axin2 is constantly expressed throughout the hair cycle quiescent phase in outer bulge stem cells that produce their own Wnt signals. Ablating Wnt signaling in the bulge cells causes them to lose their stem cell potency to contribute to hair growth and undergo premature differentiation instead. Bulge cells express secreted Wnt inhibitors, including Dickkopf (Dkk) and secreted frizzled-related protein 1 (Sfrp1). However, the Dickkopf 3 (Dkk3) protein becomes localized to the Wnt-inactive inner bulge that contains differentiated cells. We find that Axin2 expression remains confined to the outer bulge, whereas Dkk3 continues to be localized to the inner bulge during the hair cycle growth phase. Our data suggest that autocrine Wnt signaling in the outer bulge maintains stem cell potency throughout hair cycle quiescence and growth, whereas paracrine Wnt inhibition of inner bulge cells reinforces differentiation.
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159
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Li Y, Adomat H, Guns ET, Hojabrpour P, Duronio V, Curran TA, Jalili RB, Jia W, Delwar Z, Zhang Y, Elizei SS, Ghahary A. Identification of a Hematopoietic Cell Dedifferentiation-Inducing Factor. J Cell Physiol 2016; 231:1350-63. [PMID: 26529564 DOI: 10.1002/jcp.25239] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 11/02/2015] [Indexed: 12/26/2022]
Abstract
It has long been realized that hematopoietic cells may have the capacity to trans-differentiate into non-lymphohematopoietic cells under specific conditions. However, the mechanisms and the factors for hematopoietic cell trans-differentiation remain unknown. In an in vitro culture system, we found that using a conditioned medium from proliferating fibroblasts can induce a subset of hematopoietic cells to become adherent fibroblast-like cells (FLCs). FLCs are not fibroblasts nor other mesenchymal stromal cells, based on their expression of type-1 collagen, and other stromal cell marker genes. To identify the active factors in the conditioned medium, we cultured fibroblasts in a serum-free medium and collected it for further purification. Using the fractions from filter devices of different molecular weight cut-offs, and ammonium sulfate precipitation collected from the medium, we found the active fraction is a protein. We then purified this fraction by using fast protein liquid chromatography (FPLC) and identified it by mass spectrometer as macrophage colony-stimulating factor (M-CSF). The mechanisms of M-CSF-inducing trans-differentiation of hematopoietic cells seem to involve a tyrosine kinase signalling pathway and its known receptor. The FLCs express a number of stem cell markers including SSEA-1 and -3, OCT3/4, NANOG, and SOX2. Spontaneous and induced differentiation experiments confirmed that FLCs can be further differentiated into cell types of three germ layers. These data indicate that hematopoietic cells can be induced by M-CSF to dedifferentiate to multipotent stem cells. This study also provides a simple method to generate multipotent stem cells for clinical applications.
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Affiliation(s)
- Yunyuan Li
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Hans Adomat
- Vancouver Prostate Centre, Vancouver, British Columbia, Canada
| | | | - Payman Hojabrpour
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Vincent Duronio
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Terry-Ann Curran
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Reza Baradar Jalili
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - William Jia
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada.,Brain Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Zahid Delwar
- Department of Experimental Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Yun Zhang
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sanam Salimi Elizei
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Aziz Ghahary
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
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160
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Matsumura H, Mohri Y, Binh NT, Morinaga H, Fukuda M, Ito M, Kurata S, Hoeijmakers J, Nishimura EK. Hair follicle aging is driven by transepidermal elimination of stem cells via COL17A1 proteolysis. Science 2016; 351:aad4395. [PMID: 26912707 DOI: 10.1126/science.aad4395] [Citation(s) in RCA: 237] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 12/17/2015] [Indexed: 12/12/2022]
Abstract
Hair thinning and loss are prominent aging phenotypes but have an unknown mechanism. We show that hair follicle stem cell (HFSC) aging causes the stepwise miniaturization of hair follicles and eventual hair loss in wild-type mice and in humans. In vivo fate analysis of HFSCs revealed that the DNA damage response in HFSCs causes proteolysis of type XVII collagen (COL17A1/BP180), a critical molecule for HFSC maintenance, to trigger HFSC aging, characterized by the loss of stemness signatures and by epidermal commitment. Aged HFSCs are cyclically eliminated from the skin through terminal epidermal differentiation, thereby causing hair follicle miniaturization. The aging process can be recapitulated by Col17a1 deficiency and prevented by the forced maintenance of COL17A1 in HFSCs, demonstrating that COL17A1 in HFSCs orchestrates the stem cell-centric aging program of the epithelial mini-organ.
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Affiliation(s)
- Hiroyuki Matsumura
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Yasuaki Mohri
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Nguyen Thanh Binh
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan. Department of Stem Cell Medicine, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa 920-0934, Japan
| | - Hironobu Morinaga
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Makoto Fukuda
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Mayumi Ito
- Departments of Dermatology and Cell Biology, New York University School of Medicine, New York, NY, USA
| | - Sotaro Kurata
- Beppu Garden-Hill Clinic, Kurata Clinic, Beppu city, Oita 8740831, Japan
| | - Jan Hoeijmakers
- Department of Genetics, Cancer Genomics Center, Erasmus MC, Room Ee 722, Dr. Wytemaweg 80, 3015 CN Rotterdam, Netherlands
| | - Emi K Nishimura
- Department of Stem Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
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161
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Nagai MA. Pleckstrin homology-like domain, family A, member 1 ( PHLDA1) and cancer. Biomed Rep 2016; 4:275-281. [PMID: 26998263 DOI: 10.3892/br.2016.580] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 01/19/2016] [Indexed: 12/12/2022] Open
Abstract
Pleckstrin homology-like domain, family A, member 1 (PHLDA1) encodes a member of an evolutionarily conserved pleckstrin homology-related domain protein family. It was first identified as a potential transcription factor required for Fas expression and activation-induced apoptosis in mouse T cell hybridomas. The exact molecular and biological functions of PHLDA1 remain to be elucidated. However, its expression is induced by a variety of external stimuli and there is evidence that it may function as a transcriptional activator that acts as a mediator of apoptosis, proliferation, differentiation and cell migration dependent on the cellular type and context. Recently, PHLDA1 has received attention due to its association with cancer. In the present review, the current knowledge of PHLDA1 protein structure, expression regulation and function is summarized. In addition, the current data in the literature is reviewed with regards to the role of PHLDA1 in cancer pathogenesis.
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Affiliation(s)
- Maria Aparecida Nagai
- Discipline of Oncology, Department of Radiology, Faculty of Medicine, University of São Paulo, Laboratory of Molecular Genetics, Center for Translational Research in Oncology, Cancer Institute of São Paulo, São Paulo, SP 01246-000, Brazil
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162
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Wiener DJ, Doherr MG, Müller EJ, Welle MM. Spatial Distribution of Stem Cell-Like Keratinocytes in Dissected Compound Hair Follicles of the Dog. PLoS One 2016; 11:e0146937. [PMID: 26788850 PMCID: PMC4720375 DOI: 10.1371/journal.pone.0146937] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 12/23/2015] [Indexed: 11/21/2022] Open
Abstract
Hair cycle disturbances are common in dogs and comparable to some alopecic disorders in humans. A normal hair cycle is maintained by follicular stem cells which are predominately found in an area known as the bulge. Due to similar morphological characteristics of the bulge area in humans and dogs, the shared particularity of compound hair follicles as well as similarities in follicular biomarker expression, the dog is a promising model to study human hair cycle and stem cell disorders. To gain insight into the spatial distribution of follicular keratinocytes with stem cell potential in canine compound follicles, we microdissected hair follicles in anagen and telogen from skin samples of freshly euthanized dogs. The keratinocytes isolated from different locations were investigated for their colony forming efficiency, growth and differentiation potential as well as clonal growth. Our results indicate that i) compound and single hair follicles exhibit a comparable spatial distribution pattern with respect to cells with high growth potential and stem cell-like characteristics, ii) the lower isthmus (comprising the bulge) harbors most cells with high growth potential in both, the anagen and the telogen hair cycle stage, iii) unlike in other species, colonies with highest growth potential are rather small with an irregular perimeter and iv) the keratinocytes derived from the bulbar region exhibit characteristics of actively dividing transit amplifying cells. Our results now provide the basis to conduct comparative studies of normal dogs and those with hair cycle disorders with the possibility to extend relevant findings to human patients.
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Affiliation(s)
- Dominique J. Wiener
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Dermfocus, Vetsuisse Faculty, Inselspital, Bern University Hospital, Bern, Switzerland
- * E-mail:
| | - Marcus G. Doherr
- Institute of Veterinary Epidemiology and Biostatistics, Department of Veterinary Medicine, Free University of Berlin, Berlin, Germany
| | - Eliane J. Müller
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Dermfocus, Vetsuisse Faculty, Inselspital, Bern University Hospital, Bern, Switzerland
- Department of Dermatology, Inselspital, Bern University Hospital, Bern, Switzerland
| | - Monika M. Welle
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Dermfocus, Vetsuisse Faculty, Inselspital, Bern University Hospital, Bern, Switzerland
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163
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Yoon JS, Choi M, Shin CY, Paik SH, Kim KH, Kwon O. Development of a Model for Chemotherapy-Induced Alopecia: Profiling of Histological Changes in Human Hair Follicles after Chemotherapy. J Invest Dermatol 2016; 136:584-92. [PMID: 26774950 DOI: 10.1038/jid.2015.358] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 08/26/2015] [Accepted: 08/31/2015] [Indexed: 11/10/2022]
Abstract
Optimized research models are required to further understand the pathogenesis and prophylaxis of chemotherapy-induced alopecia. Our aim was to develop a mouse model for chemotherapy-induced alopecia by follicular unit transplantation of human hair follicles onto immunodeficient mice. Twenty-two weeks after transplantation, a single dose of cyclophosphamide (Cph) was administered to mice in the Cph100 (100 mg/kg) and Cph150 (150 mg/kg) groups. On day 6, hair follicles showed dystrophic changes, with swollen dermal papilla and ectopic melanin clumping in the hair bulb. In addition, upregulated expression of apoptotic regulators [P53, Fas/Fas-ligand, tumor necrosis factor-related apoptosis-inducing ligand/tumor necrosis factor-related apoptosis-inducing ligand receptor (TRAIL/TRAIL receptor), and Bax], increased apoptotic matrix keratinocytes, downregulated Ki67 expression, and decreased melanogenic protein in the hair bulb were noted in both groups. After 12 treatment days, hair follicles in Cph100 mice appeared to diminish dystrophic changes. In contrast, hair follicles of Cph150 mice prematurely entered a dystrophic catagen phase after 9 treatment days, and immunofluorescence staining for Ki67 and melanogenic protein expressions was barely visible. Two hair follicle damage response pathways were observed in this model, namely dystrophic anagen (Cph100) and catagen (Cph150) pathways. Our model might be useful for further understanding the impact of chemotherapy on human hair follicles.
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Affiliation(s)
- Ji-Seon Yoon
- Laboratory of Cutaneous Aging and Hair Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, Korea
| | - Mira Choi
- Laboratory of Cutaneous Aging and Hair Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, Korea; Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea
| | - Chang Yup Shin
- Laboratory of Cutaneous Aging and Hair Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, Korea
| | - Seung Hwan Paik
- Laboratory of Cutaneous Aging and Hair Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, Korea; Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea
| | - Kyu Han Kim
- Laboratory of Cutaneous Aging and Hair Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, Korea; Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea
| | - Ohsang Kwon
- Laboratory of Cutaneous Aging and Hair Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, Korea; Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea.
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164
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Gerhards NM, Sayar BS, Origgi FC, Galichet A, Müller EJ, Welle MM, Wiener DJ. Stem Cell-Associated Marker Expression in Canine Hair Follicles. J Histochem Cytochem 2016; 64:190-204. [PMID: 26739040 DOI: 10.1369/0022155415627679] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 12/28/2015] [Indexed: 01/01/2023] Open
Abstract
Functional hair follicle (HF) stem cells (SCs) are crucial to maintain the constant recurring growth of hair. In mice and humans, SC subpopulations with different biomarker expression profiles have been identified in discrete anatomic compartments of the HF. The rare studies investigating canine HF SCs have shown similarities in biomarker expression profiles to that of mouse and human SCs. The aim of our study was to broaden the current repertoire of SC-associated markers and their expression patterns in the dog. We combined analyses on the expression levels of CD34, K15, Sox9, CD200, Nestin, LGR5 and LGR6 in canine skin using RT-qPCR, the corresponding proteins in dog skin lysates, and their expression patterns in canine HFs using immunohistochemistry. Using validated antibodies, we were able to define the location of CD34, Sox9, Keratin15, LGR5 and Nestin in canine HFs and confirm that all tested biomarkers are expressed in canine skin. Our results show similarities between the expression profile of canine, human and mouse HF SC markers. This repertoire of biomarkers will allow us to conduct functional studies and investigate alterations in the canine SC compartment of different diseases, like alopecia or skin cancer with the possibility to extend relevant findings to human patients.
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Affiliation(s)
- Nora M Gerhards
- Institute of Animal Pathology, Dermfocus, Vetsuisse Faculty, University of Bern, Bern, Switzerland (NMG, BSS, AG, EJM, MMW, DJW)
| | - Beyza S Sayar
- Institute of Animal Pathology, Dermfocus, Vetsuisse Faculty, University of Bern, Bern, Switzerland (NMG, BSS, AG, EJM, MMW, DJW),Molecular Dermatology and Stem Cell Research, Institute of Animal Pathology and DermFocus, Vetsuisse Faculty, University of Bern, Bern, Switzerland (BSS, AG, EJM)
| | - Francesco C Origgi
- Center for Fish and Wildlife Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland (FCO)
| | - Arnaud Galichet
- Institute of Animal Pathology, Dermfocus, Vetsuisse Faculty, University of Bern, Bern, Switzerland (NMG, BSS, AG, EJM, MMW, DJW),Molecular Dermatology and Stem Cell Research, Institute of Animal Pathology and DermFocus, Vetsuisse Faculty, University of Bern, Bern, Switzerland (BSS, AG, EJM)
| | - Eliane J Müller
- Institute of Animal Pathology, Dermfocus, Vetsuisse Faculty, University of Bern, Bern, Switzerland (NMG, BSS, AG, EJM, MMW, DJW),Molecular Dermatology and Stem Cell Research, Institute of Animal Pathology and DermFocus, Vetsuisse Faculty, University of Bern, Bern, Switzerland (BSS, AG, EJM),Department of Dermatology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland (EJM)
| | - Monika M Welle
- Institute of Animal Pathology, Dermfocus, Vetsuisse Faculty, University of Bern, Bern, Switzerland (NMG, BSS, AG, EJM, MMW, DJW)
| | - Dominique J Wiener
- Institute of Animal Pathology, Dermfocus, Vetsuisse Faculty, University of Bern, Bern, Switzerland (NMG, BSS, AG, EJM, MMW, DJW)
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165
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KACHAM S, BIRRU B, PARCHA SR, BAADHE R. Limbal stem cell deficiency: special focus on tracking limbal stem cells. Turk J Biol 2016. [DOI: 10.3906/biy-1507-144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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166
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Bergler-Czop B, Arasiewicz H, Brzezińska-Wcisło L. Cicatricial alopecia: What’s new in etiology? EUR J INFLAMM 2015. [DOI: 10.1177/1721727x15617169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Cicatricial alopecia is a rare, clinically diversified set of disorders causing permanent and irreversible hair loss, which often results in serious discomfort and patient’s mental problems.Clinically, this form of irreversible hair loss is characterized by visible loss of hair follicle openings in the bald spots. Histologically, it consists in destroying a hair follicle and replacing it with fibrocartilage. Such disorders are perceived as primary if a hair follicle itself is the target of the disease process and secondary if hair follicles are damaged incidentally in the context of more general tissue damage (e.g. deep skin infections, thermal burns, trauma or ionizing radiation).In this article we tried to summarize the knowledge on possible pathogenic mechanisms of cicatricial alopecia. The presented factors usually overlap and affect prognosis of particular patients. Their profound understanding may enable further research on the treatment methods of this challenging disease unit.
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Affiliation(s)
- Beata Bergler-Czop
- School of Medicine in Katowice, Medical University of Silesia, Department of Dermatology, Francuska 20–24, 40-027 Katowice, Poland
| | - Hubert Arasiewicz
- School of Medicine in Katowice, Medical University of Silesia, Department of Dermatology, Francuska 20–24, 40-027 Katowice, Poland
| | - Ligia Brzezińska-Wcisło
- School of Medicine in Katowice, Medical University of Silesia, Department of Dermatology, Francuska 20–24, 40-027 Katowice, Poland
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167
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Langan EA, Philpott MP, Kloepper JE, Paus R. Human hair follicle organ culture: theory, application and perspectives. Exp Dermatol 2015; 24:903-11. [DOI: 10.1111/exd.12836] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Ewan A. Langan
- Department of Dermatology; University of Luebeck; Luebeck Germany
- Centre for Cutaneous Research; Blizard Institute; Queen Mary University; London UK
| | - Michael P. Philpott
- Centre for Cutaneous Research; Blizard Institute; Queen Mary University; London UK
| | | | - Ralf Paus
- Dermatology Research Centre; Institute of Inflammation and Repair; University of Manchester; Manchester UK
- Department of Dermatology; University of Muenster; Muenster Germany
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168
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Yang R, Zheng Y, Burrows M, Liu S, Wei Z, Nace A, Guo W, Kumar S, Cotsarelis G, Xu X. Generation of folliculogenic human epithelial stem cells from induced pluripotent stem cells. Nat Commun 2015; 5:3071. [PMID: 24468981 PMCID: PMC4049184 DOI: 10.1038/ncomms4071] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 12/05/2013] [Indexed: 12/15/2022] Open
Abstract
Epithelial stem cells (EpSCs) in the hair follicle bulge are required for hair follicle growth and cycling. The isolation and propagation of human EpSCs for tissue engineering purposes remains a challenge. Here we develop a strategy to differentiate human iPSCs (hiPSCs) into CD200+/ITGA6+ EpSCs that can reconstitute the epithelial components of the hair follicle and interfollicular epidermis. The hiPSC-derived CD200+/ITGA6+ cells show a similar gene expression signature as EpSCs directly isolated from human hair follicles. Human iPSC-derived CD200+/ITGA6+ cells are capable of generating all hair follicle lineages including the hair shaft, and the inner and outer root sheaths in skin reconstitution assays. The regenerated hair follicles possess a KRT15+ stem cell population and produce hair shafts expressing hair specific keratins. These results suggest an approach for generating large numbers of human EpSCs for tissue engineering and new treatments for hair loss, wound healing and other degenerative skin disorders.
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Affiliation(s)
- Ruifeng Yang
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Ying Zheng
- Department of Dermatology, Kligman Laboratories, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Michelle Burrows
- Department of Dermatology, Kligman Laboratories, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Shujing Liu
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Zhi Wei
- Department of Computer Science, New Jersey Institute of Technology, Newark, New Jersey 07102, USA
| | - Arben Nace
- Department of Dermatology, Kligman Laboratories, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Wei Guo
- Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Suresh Kumar
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - George Cotsarelis
- Department of Dermatology, Kligman Laboratories, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Xiaowei Xu
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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169
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Ojeh N, Pastar I, Tomic-Canic M, Stojadinovic O. Stem Cells in Skin Regeneration, Wound Healing, and Their Clinical Applications. Int J Mol Sci 2015; 16:25476-501. [PMID: 26512657 PMCID: PMC4632811 DOI: 10.3390/ijms161025476] [Citation(s) in RCA: 171] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 10/15/2015] [Accepted: 10/20/2015] [Indexed: 12/18/2022] Open
Abstract
The skin is the largest organ of the body and has an array of functions. Skin compartments, epidermis, and hair follicles house stem cells that are indispensable for skin homeostasis and regeneration. These stem cells also contribute to wound repair, resulting in restoration of tissue integrity and function of damaged tissue. Unsuccessful wound healing processes often lead to non-healing wounds. Chronic wounds are caused by depletion of stem cells and a variety of other cellular and molecular mechanisms, many of which are still poorly understood. Current chronic wound therapies are limited, so the search to develop better therapeutic strategies is ongoing. Adult stem cells are gaining recognition as potential candidates for numerous skin pathologies. In this review, we will discuss epidermal and other stem cells present in the skin, and highlight some of the therapeutic applications of epidermal stem cells and other adult stem cells as tools for cell/scaffold-based therapies for non-healing wounds and other skin disorders. We will also discuss emerging concepts and offer some perspectives on how skin tissue-engineered products can be optimized to provide efficacious therapy in cutaneous repair and regeneration.
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Affiliation(s)
- Nkemcho Ojeh
- Faculty of Medical Sciences, the University of the West Indies, Cave Hill Campus, P.O. Box 64, Bridgetown BB 11000, St. Michael, Barbados; E-Mail:
| | - Irena Pastar
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller Medical School, 1600 NW 10th Avenue, RMSB, Room 2023-A, Miami, FL 33136, USA; E-Mails: (I.P.); (M.T.-C.)
| | - Marjana Tomic-Canic
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller Medical School, 1600 NW 10th Avenue, RMSB, Room 2023-A, Miami, FL 33136, USA; E-Mails: (I.P.); (M.T.-C.)
| | - Olivera Stojadinovic
- Wound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami Miller Medical School, 1600 NW 10th Avenue, RMSB, Room 2023-A, Miami, FL 33136, USA; E-Mails: (I.P.); (M.T.-C.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-305-243-7295; Fax: +1-305-243-6191
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170
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Zhang H, Zhang S, Zhao H, Qiao J, Liu S, Deng Z, Lei X, Ning L, Cao Y, Zhao Y, Duan E. Ovine Hair Follicle Stem Cells Derived from Single Vibrissae Reconstitute Haired Skin. Int J Mol Sci 2015; 16:17779-97. [PMID: 26247934 PMCID: PMC4581221 DOI: 10.3390/ijms160817779] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 07/27/2015] [Accepted: 07/28/2015] [Indexed: 12/17/2022] Open
Abstract
Hair follicle stem cells (HFSCs) possess fascinating self-renewal capacity and multipotency, which play important roles in mammalian hair growth and skin wound repair. Although HFSCs from other mammalian species have been obtained, the characteristics of ovine HFSCs, as well as the methods to isolate them have not been well addressed. Here, we report an efficient strategy to obtain multipotent ovine HFSCs. Through microdissection and organ culture, we obtained keratinocytes that grew from the bulge area of vibrissa hair follicles, and even abundant keratinocytes were harvested from a single hair follicle. These bulge-derived keratinocytes are highly positive for Krt15, Krt14, Tp63, Krt19 and Itga6; in addition to their strong proliferation abilities in vitro, these keratinocytes formed new epidermis, hair follicles and sebaceous glands in skin reconstitution experiments, showing that these are HFSCs from the bulge outer root sheath. Taken together, we developed an efficient in vitro system to enrich ovine HFSCs, providing enough HFSCs for the investigations about the ovine hair cycle, aiming to promote wool production in the future.
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Affiliation(s)
- Huishan Zhang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Shoubing Zhang
- Department of Histology & Embryology, School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China.
| | - Huashan Zhao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Jingqiao Qiao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Shuang Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Zhili Deng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xiaohua Lei
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Lina Ning
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Yujing Cao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Yong Zhao
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Enkui Duan
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
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171
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Barrault C, Garnier J, Pedretti N, Cordier-Dirikoc S, Ratineau E, Deguercy A, Bernard FX. Androgens induce sebaceous differentiation in sebocyte cells expressing a stable functional androgen receptor. J Steroid Biochem Mol Biol 2015; 152:34-44. [PMID: 25864624 DOI: 10.1016/j.jsbmb.2015.04.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 03/27/2015] [Accepted: 04/04/2015] [Indexed: 02/07/2023]
Abstract
Androgens act through non-genomic and androgen receptor (AR)-dependent genomic mechanisms. AR is expressed in the sebaceous gland and the importance of androgens in the sebaceous function is well established. However, the in vitro models used to date have failed to evidence a clear genomic effect (e.g., modification of gene expression profile) of androgens on human sebocyte cells. In order to study the impact of active androgens in sebocytes, we constructed a stable human sebocyte cell line derived from SEBO662 [17] constitutively expressing a fully functional AR. In these SEBO662 AR+ cells, dihydrotestosterone (DHT) induced AR nuclear translocation and the strong modulation of a set of transcripts (RASD1, GREB1...) known to be androgen-sensitive in other androgenic cells and tissues. Moreover, we observed that DHT precociously down-regulated markers for immature follicular cells (KRT15, TNC) and for hair lineage (KRT75, FST) and up-regulated the expression of genes potentially related to sebocyte differentiation (MUC1/EMA, AQP3, FADS2). These effects were fully confirmed at the protein level. In addition, DHT-stimulated SEBO662 AR+, cultured in a low-calcium defined keratinocyte medium without serum or any complement, neosynthesize lipids, including sebum lipids, and store increased amounts of triglycerides in lipid droplets. DHT also induces morphological changes, increases cell size, and treatments over 7 days lead to a time-dependent increase in the population of apoptotic DNA-fragmented cells. Taken together, these results show for the first time that active androgens alone can engage immature sebocytes in a clear lipogenic differentiation process (Graphical abstract). These effects depend on the expression of a functional AR in these cells. This model should be of interest for revisiting the mechanisms of the sebaceous function in vitro and for the design of relevant pharmacological models for drug or compound testing.
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Affiliation(s)
| | - Julien Garnier
- BIOalternatives, 1 bis rue des Plantes, 86160 Gençay, France.
| | | | | | | | - Alain Deguercy
- BIOalternatives, 1 bis rue des Plantes, 86160 Gençay, France.
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172
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Kure K, Isago T, Hirayama T. Changes in the sebaceous gland in patients with male pattern hair loss (androgenic alopecia). J Cosmet Dermatol 2015; 14:178-84. [DOI: 10.1111/jocd.12153] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Katsuhiro Kure
- Department of Plastic and Reconstructive Surgery; Tokyo Women's Medical University Medical Center East; Tokyo Japan
- Plaza Plastic Surgery; Tokyo Japan
| | - Tsukasa Isago
- Department of Plastic and Reconstructive Surgery; Tokyo Women's Medical University Medical Center East; Tokyo Japan
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173
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Najafzadeh N, Esmaeilzade B, Dastan Imcheh M. Hair follicle stem cells: In vitro and in vivo neural differentiation. World J Stem Cells 2015; 7:866-872. [PMID: 26131317 PMCID: PMC4478633 DOI: 10.4252/wjsc.v7.i5.866] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 02/22/2015] [Accepted: 04/07/2015] [Indexed: 02/06/2023] Open
Abstract
Hair follicle stem cells (HFSCs) normally give rise to keratinocytes, sebocytes, and transient amplifying progenitor cells. Along with the capacity to proliferate rapidly, HFSCs provide the basis for establishing a putative source of stem cells for cell therapy. HFSCs are multipotent stem cells originating from the bulge area. The importance of these cells arises from two important characteristics, distinguishing them from all other adult stem cells. First, they are accessible and proliferate for long periods. Second, they are multipotent, possessing the ability to differentiate into mesodermal and ectodermal cell types. In addition to a developmental capacity in vitro, HFSCs display an ability to form differentiated cells in vivo. During the last two decades, numerous studies have led to the development of an appropriate culture condition for producing various cell lineages from HFSCs. Therefore, these stem cells are considered as a novel source for cell therapy of a broad spectrum of neurodegenerative disorders. This review presents the current status of human, rat, and mouse HFSCs from both the cellular and molecular biology and cell therapy perspectives. The first section of this review highlights the importance of HFSCs and in vitro differentiation, while the final section emphasizes the significance of cell differentiation in vivo.
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174
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He Y, Luo Y, Cheng L, Wang J, Liu X, Shao B, Cui Y. Determination of Secondary Follicle Characteristics, Density, Activity, and Hoxc13 Expression Pattern of Hexi Cashmere Goats Breed. Anat Rec (Hoboken) 2015; 298:1796-803. [PMID: 26097036 DOI: 10.1002/ar.23185] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 04/01/2015] [Accepted: 04/30/2015] [Indexed: 11/07/2022]
Abstract
This experiment was conducted to identify some aspects of secondary follicle (SF) characteristics of Hexi cashmere goats at five different growing stages in one year in order and discover the expression pattern of Hoxc13 in a SF cycling to provide morphological basis for studying the growth of cashmere. Ten cashmere goats of one-year old (5 males, 5 females) were included in this study. The density and activity of SF were observed and measured by making paraffin sections, the ultra-structural features of SF were studied under transmission electron microscopy (TEM) by making ultra-thin sections, and the expression of Hoxc13 was investigated through the immunohistochemistry method. The average diameter of SF had the smallest value in the anagen stage, and significant difference (P < 0.05) was found between the anagen stage and other stages. The density of SF increased gradually through the different growing stages, and significant difference was found between the anagen and procatagen stages (P < 0.05). With an increase in time (months), the percentage of SF activity increased, and significant difference in the percentage of SF activity was found between the telogen and anagen stages (P < 0.05). At the telogen stage, the layers of connective tissue sheath (CTS) of SF were unclear, hemidesmosomes between the outer root sheath (ORS) and basement membrane disappeared, and dead cells were found at the top of the SF. The rudiments of new SF were found in the proanagen stage, CTS was thickened, and the cells of ORS were stretched out like fingers. At the anagen stage, the structure of SF was integral, and the inner root sheath (IRS) consisted of three concentric layers (Helen, Huxley, and Cuticle layers). The cells of Huxley's layer degenerated gradually, and pseudopodia were formed on the cells of ORS in the procatagen stage. At the catagen stage, the ORS was separated from the IRS, and IRS disappeared. Huxley's layer was absent in the inactive SF while, the ORS was present in the active SF. Hoxc 13 was expressed in the epidermis and sebaceous gland o, ORS, IRS, hair shaft of SF in the skin. Hoxc13 was expressed weakly during procatagen, catagen, and telogen stage, while with an increase in proanagen and anagen stage, significant difference was found between them. These findings demonstrated the ultra-structural features of SF could provide the useful activity criteria, and Hoxc13 associated with the SF activity.
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Affiliation(s)
- Yanyu He
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China.,Gansu Key Laboratory of Herbivorous Animal Biotechnology, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Yuzhu Luo
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Lixiang Cheng
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Jiqing Wang
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Xiu Liu
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Bin Shao
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Yan Cui
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
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175
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Ohyama M. Pump up the hair follicle. Br J Dermatol 2015; 172:1479-1480. [DOI: 10.1111/bjd.13724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Ohyama
- Department of Dermatology; Keio University School of Medicine; 35 Shinanomachi Shinjuku-ku Tokyo Japan
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176
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Lee J, Lee KI, Chung HM. Investigation of Transcriptional Gene Profiling in Normal Murine Hair Follicular Substructures Using Next-Generation Sequencing to Provide Potential Insights Into Skin Disease. Cell Transplant 2015; 25:377-99. [PMID: 25995029 DOI: 10.3727/096368915x688227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Skin diseases, including hair-related diseases and neoplasia, are a major public health problem. While their prevalence is increasing, their treatment options are limited. Researchers have tried to investigate the genes and signal pathways underlying hair follicles (HFs) to develop genetically targeted therapies through microarrays, which represent an appropriate modality for the analysis of small genomes. To enable the comprehensive transcriptome analysis of large and/or complex transcriptomes, we performed RNA-seq using next-generation sequencing (NGS). We isolated interfollicular keratinocytes (IFKs), HFs, and dermal fibroblasts including dermal papilla cells (DFs-DPCs) from normal C57BL/6 murine skin, transplanted combinations of these samples into nude mice, and followed the mice over time. Sustained hair growth was supported by HFs and DFs-DPCs. We then investigated the pathways and the relevant gene ontology associated with any identified differentially expressed genes (DEGs). In addition, in the culture and flow cytometry (FCM), the HFs had a more quiescent cell cycle pattern than did the IFKs and DFs-DPCs. Therefore, the representative cell cycle-related gene expression of IFKs, HFs, and DFs-DPCs was analyzed by NGS. Our study will allow researchers to further investigate the potential interactions and signaling pathways that are active in HF-related diseases and cancer and may aid in future bioengineering applications.
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Affiliation(s)
- Jaein Lee
- Department of Laboratory Medicine, CHA Gangnam Medical Center, College of Medicine, CHA University, Seoul, Republic of Korea
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177
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Adhikary G, Grun D, Balasubramanian S, Kerr C, Huang JM, Eckert RL. Survival of skin cancer stem cells requires the Ezh2 polycomb group protein. Carcinogenesis 2015; 36:800-10. [PMID: 25969142 DOI: 10.1093/carcin/bgv064] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 05/06/2015] [Indexed: 01/01/2023] Open
Abstract
Polycomb group proteins, including Ezh2, are important candidate stem cell maintenance proteins in epidermal squamous cell carcinoma. We previously showed that epidermal cancer stem cells (ECS cells) represent a minority of cells in tumors, are highly enriched in Ezh2 and drive aggressive tumor formation. We now show that Ezh2 is required for ECS cell survival, migration, invasion and tumor formation and that this is associated with increased histone H3 trimethylation on lysine 27, a mark of Ezh2 action. We also show that Ezh2 knockdown or treatment with Ezh2 inhibitors, GSK126 or EPZ-6438, reduces Ezh2 level and activity, leading to reduced ECS cell spheroid formation, migration, invasion and tumor growth. These studies indicate that epidermal squamous cell carcinoma cells contain a subpopulation of cancer stem (tumor-initiating) cells that are enriched in Ezh2, that Ezh2 is required for optimal ECS cell survival and tumor formation and that treatment with Ezh2 inhibitors may be a strategy for reducing ECS cell survival and suppressing tumor formation.
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Affiliation(s)
- Gautam Adhikary
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N. Greene Street, Baltimore, MD 21201, USA
| | - Daniel Grun
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N. Greene Street, Baltimore, MD 21201, USA
| | - Sivaprakasam Balasubramanian
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N. Greene Street, Baltimore, MD 21201, USA
| | - Candace Kerr
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N. Greene Street, Baltimore, MD 21201, USA, Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine
| | - Jennifer M Huang
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N. Greene Street, Baltimore, MD 21201, USA
| | - Richard L Eckert
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, 108 N. Greene Street, Baltimore, MD 21201, USA, Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Department of Dermatology, University of Maryland School of Medicine and Department of Reproductive Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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178
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Donnenberg VS, Donnenberg AD. Stem cell state and the epithelial-to-mesenchymal transition: Implications for cancer therapy. J Clin Pharmacol 2015; 55:603-19. [PMID: 25708160 DOI: 10.1002/jcph.486] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 02/19/2015] [Indexed: 01/09/2023]
Abstract
The cancer stem cell paradigm, the epithelial-to-mesenchymal transition and its converse, the mesenchymal-to-epithelial transition, have reached convergence. Implicit in this understanding is the notion that cancer cells can change state, and with such change come bidirectional alterations in motility, proliferative activity, and drug resistance. As such, tumors present a moving target for antineoplastic therapy. This article will review the evolving adult stem cell paradigm and how changes in our understanding of the bidirectional nature of cancer cell differentiation may affect the selection and timing of antineoplastic therapy. The goal is to determine how to best administer therapies potentially targeted against the cancer stem cell state in the context of established treatment regimens, and to evaluate long-term effects beyond tumor regression.
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Affiliation(s)
- Vera S Donnenberg
- Department of Cardiothoracic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
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179
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Jing J, Wu XJ, Li YL, Cai SQ, Zheng M, Lu ZF. Expression of decorin throughout the murine hair follicle cycle: hair cycle dependence and anagen phase prolongation. Exp Dermatol 2015; 23:486-91. [PMID: 24816226 DOI: 10.1111/exd.12441] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/08/2014] [Indexed: 01/14/2023]
Abstract
Decorin is a prototypical member of the small leucine-rich proteoglycan (SLRP) family, which is involved in numerous biological processes. The role of decorin, as a representative SLRP, in hair follicle morphogenesis has not been elucidated. We present our initial findings on decorin expression patterns during induced murine hair follicle (HF) cycles. It was found that decorin expression is exclusively restricted to the epidermis, outer root sheath and sebaceous glands during the anagen phase, which correlates with the upregulation of decorin mRNA and protein expression in depilated murine dorsal skin. Furthermore, we used a functional approach to investigate the effects of recombinant human decorin (rhDecorin) via cutaneous injection into HFs at various murine hair cycle stages. The local injection of rhDecorin (100 μg/ml) into the hypodermis of depilated C57BL/6 mice at anagen delayed catagen progression. In contrast, rhDecorin injection during the telogen phase caused the premature onset of anagen, as demonstrated by the assessment of the following parameters: (i) hair shaft length, (ii) follicular bulbar diameter, (iii) hair follicle cycling score and (iv) follicular phase percentage. Taken together, our results suggest that decorin may modulate follicular cycling and morphogenesis. In addition, this study also provides insight into the molecular control mechanisms governing hair follicular epithelial-mesenchymal interactions.
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Affiliation(s)
- Jing Jing
- Department of Dermatology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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180
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Self-Antigen Presentation by Keratinocytes in the Inflamed Adult Skin Modulates T-Cell Auto-Reactivity. J Invest Dermatol 2015; 135:1996-2004. [PMID: 25835957 DOI: 10.1038/jid.2015.130] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 03/16/2015] [Accepted: 03/19/2015] [Indexed: 11/08/2022]
Abstract
Keratinocytes have a pivotal role in the regulation of immune responses, but the impact of antigen presentation by these cells is still poorly understood, particularly in a situation where the antigen will be presented only in adult life. Here, we generated a transgenic mouse model in which keratinocytes exclusively present a myelin basic protein (MBP) peptide covalently linked to the major histocompatibility complex class II β-chain, solely under inflammatory conditions. In these mice, inflammation caused by epicutaneous contact sensitizer treatment resulted in keratinocyte-mediated expansion of MBP-specific CD4(+) T cells in the skin. Moreover, repeated contact sensitizer application preceding a systemic MBP immunization reduced the reactivity of the respective CD4(+) T cells and lowered the symptoms of the resulting experimental autoimmune encephalomyelitis. This downregulation was CD4(+) T-cell-mediated and dependent on the presence of the immune modulator Dickkopf-3. Thus, presentation of a neo self-antigen by keratinocytes in the inflamed, adult skin can modulate CD4(+) T-cell auto-aggression at a distal organ.
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181
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Bernárdez C, Molina-Ruiz A, Requena L. Histologic Features of Alopecias–Part I: Nonscarring Alopecias. ACTAS DERMO-SIFILIOGRAFICAS 2015. [DOI: 10.1016/j.adengl.2015.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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182
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Ma D, Chua AWC, Yang E, Teo P, Ting Y, Song C, Lane EB, Lee ST. Breast cancer resistance protein identifies clonogenic keratinocytes in human interfollicular epidermis. Stem Cell Res Ther 2015; 6:43. [PMID: 25881149 PMCID: PMC4425927 DOI: 10.1186/s13287-015-0032-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 09/10/2014] [Accepted: 03/02/2015] [Indexed: 12/17/2022] Open
Abstract
Introduction There is a practical need for the identification of robust cell-surface markers that can be used to enrich for living keratinocyte progenitor cells. Breast cancer resistance protein (ABCG2), a member of the ATP binding cassette (ABC) transporter family, is known to be a marker for stem/progenitor cells in many tissues and organs. Methods We investigated the expression of ABCG2 protein in normal human epidermis to evaluate its potential as a cell surface marker for identifying and enriching for clonogenic epidermal keratinocytes outside the pilosebaceous tract. Results Immunofluorescence and immunoblotting studies of human skin showed that ABCG2 is expressed in a subset of basal layer cells in the epidermis. Flow cytometry analysis showed approximately 2-3% of keratinocytes in non-hair-bearing epidermis expressing ABCG2; this population also expresses p63, β1 and α6 integrins and keratin 14, but not CD34, CD71, C-kit or involucrin. The ABCG2-positive keratinocytes showed significantly higher colony forming efficiency when co-cultured with mouse 3T3 feeder cells, and more extensive long-term proliferation capacity in vitro, than did ABCG2-negative keratinocytes. Upon clonal analysis, most of the freshly isolated ABCG2-positive keratinocytes formed holoclones and were capable of generating a stratified differentiating epidermis in organotypic culture models. Conclusions These data indicate that in skin, expression of the ABCG2 transporter is a characteristic of interfollicular keratinocyte progentior cells and suggest that ABCG2 may be useful for enriching keratinocyte stem cells in human interfollicular epidermis.
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Affiliation(s)
- Dongrui Ma
- Department of Plastic, Reconstructive & Aesthetic Surgery, Singapore General Hospital, Singapore, 168751, Singapore.
| | | | - Ennan Yang
- Department of Plastic, Reconstructive & Aesthetic Surgery, Singapore General Hospital, Singapore, 168751, Singapore.
| | - Peiyun Teo
- Department of Plastic, Reconstructive & Aesthetic Surgery, Singapore General Hospital, Singapore, 168751, Singapore.
| | - Yixin Ting
- Skin Bank, Burns Unit, Singapore General Hospital, Singapore, 168751, Singapore.
| | - Colin Song
- Department of Plastic, Reconstructive & Aesthetic Surgery, Singapore General Hospital, Singapore, 168751, Singapore.
| | | | - Seng Teik Lee
- Department of Plastic, Reconstructive & Aesthetic Surgery, Singapore General Hospital, Singapore, 168751, Singapore.
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183
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Narisawa Y, Koba S, Inoue T, Nagase K. Histogenesis of pure and combined Merkel cell carcinomas: An immunohistochemical study of 14 cases. J Dermatol 2015; 42:445-52. [PMID: 25720654 DOI: 10.1111/1346-8138.12808] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 01/07/2015] [Indexed: 11/30/2022]
Abstract
The histogenesis of Merkel cell carcinoma (MCC) has remained unresolved. Moreover, one of the questions is whether pure MCC and combined MCC represent the same histogenesis and entity. The existence of combined MCC suggests that MCC likely arise from pluripotent stem cells. Merkel cells (MC) localize within the bulge area, which is populated by hair follicle stem cells. We used hair follicle stem cell markers to investigate whether MCC share certain characteristics of these stem cells. Fourteen MCC specimens were examined histologically and immunohistochemically. There were six pure MCC and eight combined MCC. In six combined MCC, both MCC components and squamous components at least focally shared the expression of one or more of cytokeratin (CK)15, CK19 and CD200, which are hair follicle stem cell markers. On the other hand, four cases of pure MCC showed partially distinct CK19 expression, but did not show CK15 and/or CD200 expression. There was a distinct difference between pure MCC and combined MCC on the expression of hair follicle stem cell markers. The normal skin expressed CK15, CK19 and CD200 in the bulge area, whereas CK15 and CD200 were absent in the MC-rich glabrous skin and touch domes. The results led us to hypothesize that combined MCC originate from the hair follicle stem cells. We postulate that combined MCC undergo multidirectional differentiation into squamous, glandular, mesenchymal and Merkel cells. Further investigation is warranted to confirm the histogenesis of pure MCC and combined MCC.
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Affiliation(s)
- Yutaka Narisawa
- Division of Dermatology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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184
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Segrelles C, García-Escudero R, Garín MI, Aranda JF, Hernández P, Ariza JM, Santos M, Paramio JM, Lorz C. Akt signaling leads to stem cell activation and promotes tumor development in epidermis. Stem Cells 2015; 32:1917-28. [PMID: 24504902 DOI: 10.1002/stem.1669] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 01/18/2014] [Indexed: 01/25/2023]
Abstract
Hair follicle stem cells (HF-SCs) alternate between periods of quiescence and proliferation, to finally differentiate into all the cell types that constitute the hair follicle. Also, they have been recently identified as cells of origin in skin cancer. HF-SCs localize in a precise region of the hair follicle, the bulge, and molecular markers for this population have been established. Thus, HF-SCs are good model to study the potential role of oncogenic activations on SC physiology. Expression of a permanently active form of Akt (myrAkt) in basal cells leads to Akt hyperactivation specifically in the CD34(+)Itga6(H) population. This activation causes bulge stem cells to exit from quiescence increasing their response to proliferative stimuli and affecting some functions such as cell migration. HF-SC identity upon Akt activation is preserved; in this sense, increased proliferation does not result in stem cell exhaustion with age suggesting that Akt activation does not affect self-renewal an important aspect for normal tissue maintenance and cancer development. Genome-wide transcriptome analysis of HF-SC isolated from myrAkt and wild-type epidermis underscores changes in metabolic pathways characteristic of cancer cells. These differences manifest during a two-step carcinogenesis protocol in which Akt activation in HF-SCs results in increased tumor development and malignant transformation.
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Affiliation(s)
- Carmen Segrelles
- Molecular Oncology Unit and, Department of Basic Research, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
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185
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Colditz IG, Cox T, Small AH. Trial of human laser epilation technology for permanent wool removal in Merino sheep. Aust Vet J 2015; 93:31-5. [PMID: 25622707 DOI: 10.1111/avj.12282] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2014] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To assess whether human laser epilation technology can permanently prevent wool growth in sheep. DESIGN An observational study. METHODS Two commercial human epilation lasers (Sharplan alexandrite 755 nm laser, and Lumenis LightSheer 800 nm diode laser) were tested at energies between 10 and 100 J/cm2 and pulse widths from 2 to 400 ms. Wool was clipped from flank, breech, pizzle and around the eyes of superfine Merino sheep with Oster clippers. After initial laser removal of residual wool to reveal bare skin, individual skin sites were treated with up to 15 cycles of laser irradiation. Behavioural responses during treatment, skin temperature immediately after treatment and skin and wool responses for 3 months after treatment were monitored. RESULTS A clear transudate was evident on the skin surface within minutes. A dry superficial scab developed by 24 h and remained adherent for at least 6 weeks. When scabs were shed, there was evidence of scarring at sites receiving multiple treatment cycles and normal wool growth in unscarred skin. There was no evidence of laser energy level or pulse width affecting the response of skin and wool to treatment and no evidence of permanent inhibition of wool growth by laser treatment. Laser treatment was well tolerated by the sheep. CONCLUSIONS Treatment of woolled skin with laser parameters that induce epilation by selective photothermolysis in humans failed to induce permanent inhibition of wool growth in sheep. Absence of melanin in wool may have contributed to the result.
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Affiliation(s)
- I G Colditz
- CSIRO FD McMaster Laboratory, Locked Bag 1, Delivery Centre, Armidale, New South Wales, 2350, Australia.
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186
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Misago N, Inoue T, Narisawa Y. Cystic trichoblastoma: A report of two cases with an immunohistochemical study. J Dermatol 2015; 42:305-10. [DOI: 10.1111/1346-8138.12758] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 11/25/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Noriyuki Misago
- Division of Dermatology; Department of Internal Medicine; Faculty of Medicine; Saga University; Saga Japan
| | - Takuya Inoue
- Division of Dermatology; Department of Internal Medicine; Faculty of Medicine; Saga University; Saga Japan
| | - Yutaka Narisawa
- Division of Dermatology; Department of Internal Medicine; Faculty of Medicine; Saga University; Saga Japan
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187
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Gilanchi S, Esmaeilzade B, Eidi A, Barati M, Mehrabi S, Moghani Ghoroghi F, Nobakht M. Neuronal differentiation of rat hair follicle stem cells: the involvement of the neuroprotective factor Seladin-1 (DHCR24). IRANIAN BIOMEDICAL JOURNAL 2015; 18:136-42. [PMID: 24842139 PMCID: PMC4048477 DOI: 10.6091/ibj.1284.2014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background: The seladin-1 (selective Alzheimer disease indicator-1), also known as DHCR24, is a gene found to be down-regulated in brain region affected by Alzheimer disease (AD). Whereas, hair follicle stem cells (HFSC), which are affected in with neurogenic potential, it might to hypothesize that this multipotent cell compartment is the predominant source of seladin-1. Our aim was to evaluate seladin-1 gene expression in hair follicle stem cells. Methods: In this study, bulge area of male Wistar rat HFSC were cultured and then characterized with Seladin-1 immunocytochemistry and flow cytometry on days 8 to 14. Next, 9-11-day cells were evaluated for seladin-1 gene expression by real-time PCR. Results: Our results indicated that expression of the seladin-1 gene (DHCR24) on days 9, 10, and 11 may contribute to the development of HFSC. However, the expression of this gene on day 11 was more than day 10 and on 10th day was more than day 9. Also, we assessed HFSC on day 14 and demonstrated these cells were positive for β-ш tubulin, and seladin-1 was not expressed in this day. Conclusion: HFSC express seladin-1 and this result demonstrates that these cells might be used to cell therapy for AD in future.
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Affiliation(s)
- Samira Gilanchi
- Iran National Science Foundation, Tehran, Iran.,Dept. of Biology, Science and Research Institute, Islamic Azad University, Tehran, Iran
| | - Banafshe Esmaeilzade
- Iran National Science Foundation, Tehran, Iran.,Dept. of Anatomy, School of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Akram Eidi
- Dept. of Biology, Science and Research Institute, Islamic Azad University, Tehran, Iran
| | - Mahmood Barati
- 4Dept. of Pharmaceutical Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Soraya Mehrabi
- 5Dept. of Neurosciences, School of New Technology, Tehran University of Sciences, Tehran, Iran
| | - Fatima Moghani Ghoroghi
- Dept. of Histology and Neuroscience, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Maliheh Nobakht
- Iran National Science Foundation, Tehran, Iran.,Dept. of Histology and Neuroscience, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Anti-microbial Resistance Research Center, Iran University of Medical Science, Tehran, Iran
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188
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Sidney LE, Branch MJ, Dunphy SE, Dua HS, Hopkinson A. Concise review: evidence for CD34 as a common marker for diverse progenitors. Stem Cells 2015; 32:1380-9. [PMID: 24497003 PMCID: PMC4260088 DOI: 10.1002/stem.1661] [Citation(s) in RCA: 568] [Impact Index Per Article: 63.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 12/20/2013] [Accepted: 01/15/2014] [Indexed: 12/11/2022]
Abstract
CD34 is a transmembrane phosphoglycoprotein, first identified on hematopoietic stem and progenitor cells. Clinically, it is associated with the selection and enrichment of hematopoietic stem cells for bone marrow transplants. Due to these historical and clinical associations, CD34 expression is almost ubiquitously related to hematopoietic cells, and it is a common misconception that CD34-positive (CD34+) cells in nonhematopoietic samples represent hematopoietic contamination. The prevailing school of thought states that multipotent mesenchymal stromal cells (MSC) do not express CD34. However, strong evidence demonstrates CD34 is expressed not only by MSC but by a multitude of other nonhematopoietic cell types including muscle satellite cells, corneal keratocytes, interstitial cells, epithelial progenitors, and vascular endothelial progenitors. In many cases, the CD34+ cells represent a small proportion of the total cell population and also indicate a distinct subset of cells with enhanced progenitor activity. Herein, we explore common traits between cells that express CD34, including associated markers, morphology and differentiation potential. We endeavor to highlight key similarities between CD34+ cells, with a focus on progenitor activity. A common function of CD34 has yet to be elucidated, but by analyzing and understanding links between CD34+ cells, we hope to be able to offer an insight into the overlapping properties of cells that express CD34. Stem Cells2014;32:1380–1389
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Affiliation(s)
- Laura E Sidney
- Academic Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Queen's Medical Centre Campus, Nottingham, United Kingdom
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189
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Abstract
The epidermis and associated appendages of the skin represent a multi-lineage tissue that is maintained by perpetual rounds of renewal. During homeostasis, turnover of epidermal lineages is achieved by input from regionalized keratinocytes stem or progenitor populations with little overlap from neighboring niches. Over the last decade, molecular markers selectively expressed by a number of these stem or progenitor pools have been identified, allowing for the isolation and functional assessment of stem cells and genetic lineage tracing analysis within intact skin. These advancements have led to many fundamental observations about epidermal stem cell function such as the identification of their progeny, their role in maintenance of skin homeostasis, or their contribution to wound healing. In this chapter, we provide a methodology to identify and isolate epidermal stem cells and to assess their functional role in their respective niche. Furthermore, recent evidence has shown that the microenvironment also plays a crucial role in stem cell function. Indeed, epidermal cells are under the influence of surrounding fibroblasts, adipocytes, and sensory neurons that provide extrinsic signals and mechanical cues to the niche and contribute to skin morphogenesis and homeostasis. A better understanding of these microenvironmental cues will help engineer in vitro experimental models with more relevance to in vivo skin biology. New approaches to address and study these environmental cues in vitro will also be addressed.
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Affiliation(s)
- Yanne S Doucet
- Department of Dermatology, College of Physicians and Surgeons, Columbia University, New York, NY, 10032, USA
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190
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Liu N, Li H, Liu K, Yu J, Bu R, Cheng M, De W, Liu J, He G, Zhao J. Identification of skin-expressed genes possibly associated with wool growth regulation of Aohan fine wool sheep. BMC Genet 2014; 15:144. [PMID: 25511509 PMCID: PMC4272822 DOI: 10.1186/s12863-014-0144-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 12/03/2014] [Indexed: 11/25/2022] Open
Abstract
Background Sheep are valuable resources for the animal fibre industry. Therefore, identifying genes which regulate wool growth would offer strategies for improving the quality of fine wool. In this study, we employed Agilent sheep gene expression microarray and proteomic technology to compare the gene expression patterns of the body side (hair-rich) and groin (hairless) skins of Aohan fine wool sheep (a Chinese indigenous breed). Results Comparing the body side to the groin skins (S/G) of Aohan fine wool sheep, the microarray study revealed that 1494 probes were differentially expressed, including 602 more highly expressed and 892 less highly expressed probes. The microarray results were verified by means of quantitative PCR. Cluster analysis could distinguish the body side skin and the groin skin. Based on the Database for Annotation, Visualization and Integrated Discovery (DAVID), 38 of the differentially expressed genes were classified into four categories, namely regulation of receptor binding, multicellular organismal process, protein binding and macromolecular complex. Proteomic study revealed that 187 protein spots showed significant (p < 0.05) differences in their respective expression levels. Among them, 46 protein entries were further identified by MALDI-TOF/MS analyses. Conclusions Microarray analysis revealed thousands of differentially expressed genes, many of which were possibly associated with wool growth. Several potential gene families might participate in hair growth regulation. Proteomic analysis also indentified hundreds of differentially expressed proteins. Electronic supplementary material The online version of this article (doi:10.1186/s12863-014-0144-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Nan Liu
- Qingdao Agricultural University, Qingdao, 266109, China.
| | - Hegang Li
- Qingdao Institute of Animal Science and Veterinary Medicine, Qingdao, 266100, China.
| | - Kaidong Liu
- Qingdao Institute of Animal Science and Veterinary Medicine, Qingdao, 266100, China.
| | - Juanjuan Yu
- Qingdao Agricultural University, Qingdao, 266109, China.
| | - Ran Bu
- Qingdao Agricultural University, Qingdao, 266109, China.
| | - Ming Cheng
- Qingdao Institute of Animal Science and Veterinary Medicine, Qingdao, 266100, China.
| | - Wei De
- Nanjing Medical University, Nanjing, 210002, China.
| | - Jifeng Liu
- Qingdao Agricultural University, Qingdao, 266109, China.
| | - Guangling He
- State key Laboratory of Hydroscience and Engineering, Beijing, 100084, China.
| | - Jinshan Zhao
- Qingdao Agricultural University, Qingdao, 266109, China. .,Qingdao Institute of Animal Science and Veterinary Medicine, Qingdao, 266100, China. .,China Agricultural University, Beijing, 100193, China.
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191
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Jeon SY, Kim DC, Song KH, Kim KH. Expression Patterns of Gli-1, Pleckstrin Homology-Like Domain, Family A, Member 1, Transforming Growth Factor-β1/β2, and p63 in Sebaceous and Follicular Tumors. Ann Dermatol 2014; 26:713-21. [PMID: 25473223 PMCID: PMC4252668 DOI: 10.5021/ad.2014.26.6.713] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 03/01/2014] [Accepted: 03/04/2014] [Indexed: 01/31/2023] Open
Abstract
Background Certain epidermal appendage tumors, including hyperplasias (hamartomas), adenomas, benign epitheliomas, primordial epitheliomas, and malignant tumors, can exhibit any stage of differentiation. Several molecules associated with tumorigenesis, such as Gli-1, pleckstrin homology-like domain, family A, member 1 (PHLDA-1), transforming growth factor (TGF)-β1, TGF-β2, and p63, are associated with tumor grade and aggressive behavior in follicular and sebaceous tumors in ways that are not well understood. Objective The aim of this study was to elucidate the expression of Gli-1, PHLDA-1, TGF-β1/β2, and p63 in benign and malignant tumors of the hair and sebaceous glands and to determine their importance in the degree of tumor differentiation. Methods Immunohistochemistry was performed in follicular and sebaceous tumors using antibodies against Gli-1 (sebaceous tumor marker), PHLDA-1 (hair follicle outer root sheath [ORS] cell marker), p63, TGF-β1, and TGF-β2. Results Gli-1 was expressed in basaloid cells, sebocytes, and sebaceous carcinoma cells, and expression levels decreased as differentiation progressed. PHLDA-1 was expressed in ORS cells and some follicular tumor cells. Expression of p63 was observed in the nuclei of the outermost basaloid cells (seboblasts), poorly differentiated sebaceous carcinoma cells, and tumor cells toward the direction of the hair. Remarkably, TGF-β1 was expressed exclusively in the nuclei of benign and malignant follicular (hair) tumors, but not in sebaceous tumors, at levels that correlated with the degree of differentiation. Conclusion We propose that p63 and/or TGF-β1 are useful for predicting the degree of differentiation and malignant potential of sebaceous and follicular tumors and for distinguishing trichilemmal carcinoma from sebaceous carcinoma.
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Affiliation(s)
- Su-Young Jeon
- Department of Dermatology, Dong-A University College of Medicine, Busan, Korea
| | - Dae-Cheol Kim
- Department of Pathology, Dong-A University College of Medicine, Busan, Korea
| | - Ki-Hoon Song
- Department of Dermatology, Dong-A University College of Medicine, Busan, Korea
| | - Ki-Ho Kim
- Department of Dermatology, Dong-A University College of Medicine, Busan, Korea
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192
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Sellheyer K. Spiradenoma and cylindroma originate from the hair follicle bulge and not from the eccrine sweat gland: an immunohistochemical study with CD200 and other stem cell markers. J Cutan Pathol 2014; 42:90-101. [PMID: 25354097 DOI: 10.1111/cup.12406] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 10/12/2014] [Accepted: 10/25/2014] [Indexed: 12/25/2022]
Abstract
BACKGROUND Spiradenoma and cylindroma have historically been described as sweat gland tumors and have often been considered to be of eccrine lineage. However, (a) associations with trichoepitheliomas in Brooke-Spiegler syndrome or with trichoepitheliomas and milia in Rasmussen syndrome, (b) neoplastic combinations with hair follicle tumors in solitary cases, and (c) anatomical considerations support a folliculosebaceous-apocrine lineage. Follicular stem cell markers may allow for further characterization of these neoplasms. METHODS A total of 97 tumors were examined for the expression pattern of follicular stem cell markers cytokeratin 15 (CK15), cytokeratin 19 (CK19), pleckstrin homology-like domain, family A, member 1 (PHLDA1), and CD200. The tumors were comprised of 27 spiradenomas, 30 cylindromas, 16 hidradenomas, 19 poromas, 4 dermal duct tumors and 1 hidroacanthoma simplex. RESULTS All spiradenomas and cylindromas were CD200-positive whereas the other tumors classified as eccrine in lineage were all CD200-negative. CK15 also discriminated between spiradenomas and cylindromas and the remaining neoplasms but not to the degree of CD200. PHLDA1 and CK19 were noncontributory. CONCLUSIONS It is concluded that both spiradenoma and cylindroma are not eccrine but follicular tumors. More specifically, it is proposed that both adnexal neoplasms are derived from the hair follicle bulge and as such represent one of the least differentiated follicular tumors.
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Affiliation(s)
- Klaus Sellheyer
- Department of Dermatology, Cleveland Clinic Foundation, Cleveland, OH, 44195, USA
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193
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Culture and characterization of rat hair follicle stem cells. Cytotechnology 2014; 68:621-8. [PMID: 25407732 DOI: 10.1007/s10616-014-9807-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Accepted: 10/24/2014] [Indexed: 10/24/2022] Open
Abstract
The purpose of this study was to establish methods for isolation, culture, expansion, and characterization of rat hair follicle stem cells (rHFSCs). Hair follicles were harvested from 1-week-old Sprague-Dawley rats and digested with dispase and collagenase IV. The bulge of the hair follicle was dissected under a microscope and cultured in Dulbecco's modified Eagle's medium/F12 supplemented with KnockOut™ Serum Replacement serum substitute, penicillin-streptomycin, L-glutamine, non-essential amino acids, epidermal growth factor, basic fibroblast growth factor, polyhydric alcohol, and hydrocortisone. The rHFSCs were purified using adhesion to collagen IV. Cells were characterized by detecting marker genes with immunofluorescent staining and real-time polymerase chain reaction (PCR). The proliferation and vitality of rHFSCs at different passages were evaluated. The cultured rHFSCs showed typical cobblestone morphology with good adhesion and colony-forming ability. Expression of keratin 15, integrin α6, and integrin β1 were shown by immunocytochemistry staining. On day 1-2, the cells were in the latent phase. On day 5-6, the cells were in the logarithmic phase. Cell vitality gradually decreased from the 7th passage. Real-time PCR showed that the purified rHFSCs had good vitality and proliferative capacity and contained no keratinocytes. Highly purified rHFSCs can be obtained using tissue culture and adhesion to collagen IV. The cultured cells had good proliferative capacity and could therefore be a useful cell source for tissue-engineered hair follicles, vessels, and skin.
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194
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A guide for building biological pathways along with two case studies: hair and breast development. Methods 2014; 74:16-35. [PMID: 25449898 DOI: 10.1016/j.ymeth.2014.10.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 08/26/2014] [Accepted: 10/03/2014] [Indexed: 11/23/2022] Open
Abstract
Genomic information is being underlined in the format of biological pathways. Building these biological pathways is an ongoing demand and benefits from methods for extracting information from biomedical literature with the aid of text-mining tools. Here we hopefully guide you in the attempt of building a customized pathway or chart representation of a system. Our manual is based on a group of software designed to look at biointeractions in a set of abstracts retrieved from PubMed. However, they aim to support the work of someone with biological background, who does not need to be an expert on the subject and will play the role of manual curator while designing the representation of the system, the pathway. We therefore illustrate with two challenging case studies: hair and breast development. They were chosen for focusing on recent acquisitions of human evolution. We produced sub-pathways for each study, representing different phases of development. Differently from most charts present in current databases, we present detailed descriptions, which will additionally guide PESCADOR users along the process. The implementation as a web interface makes PESCADOR a unique tool for guiding the user along the biointeractions, which will constitute a novel pathway.
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195
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Bernárdez C, Molina-Ruiz AM, Requena L. Histologic features of alopecias-part I: nonscarring alopecias. ACTAS DERMO-SIFILIOGRAFICAS 2014; 106:158-67. [PMID: 25444580 DOI: 10.1016/j.ad.2014.07.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 07/13/2014] [Indexed: 02/08/2023] Open
Abstract
The diagnosis of disorders of the hair and scalp can generally be made on clinical grounds, but clinical signs are not always diagnostic and in some cases more invasive techniques, such as a biopsy, may be necessary. This 2-part article is a detailed review of the histologic features of the main types of alopecia based on the traditional classification of these disorders into 2 major groups: scarring and nonscarring alopecias. Scarring alopecias are disorders in which the hair follicle is replaced by fibrous scar tissue, a process that leads to permanent hair loss. In nonscarring alopecias, the follicles are preserved and hair growth can resume when the cause of the problem is eliminated. In the first part of this review, we describe the histologic features of the main forms of nonscarring alopecia. Since a close clinical-pathological correlation is essential for making a correct histologic diagnosis of alopecia, we also include a brief description of the clinical features of the principal forms of this disorder.
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Affiliation(s)
- C Bernárdez
- Servicio de Dermatología, Fundación Jiménez Díaz, Universidad Autónoma de Madrid, Madrid, España
| | - A M Molina-Ruiz
- Servicio de Dermatología, Fundación Jiménez Díaz, Universidad Autónoma de Madrid, Madrid, España.
| | - L Requena
- Servicio de Dermatología, Fundación Jiménez Díaz, Universidad Autónoma de Madrid, Madrid, España
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196
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Najafzadeh N, Sagha M, Heydari Tajaddod S, Golmohammadi MG, Massahi Oskoui N, Deldadeh Moghaddam M. In vitro neural differentiation of CD34 (+) stem cell populations in hair follicles by three different neural induction protocols. In Vitro Cell Dev Biol Anim 2014; 51:192-203. [PMID: 25294494 DOI: 10.1007/s11626-014-9818-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 08/28/2014] [Indexed: 12/17/2022]
Abstract
Differentiation of hair follicle stem cells (HFSCs) into neurons and glial cells represents a promising cell-based therapy for neurodegenerative diseases. The hair follicle bulge area is reported as a putative source of new stem cell population for many years. In vitro studies have implicated neural differentiation of HFSCs. Here, we report the identification and purification of CD34 (+) cells from hair follicle by magnetic activated cell sorting (MACS). We next determined the cytotoxic effects of all-trans retinoic acid (RA) by using cell viability assays. Moreover, the neural differentiation potential of CD34 (+) cells was evaluated in the presence of RA, serum-free condition, and neural differentiation medium (NDM) treatments by using immunocytochemistry and reverse transcription polymerase chain reaction (RT-PCR). Our results showed that the isolated CD34 (+) stem cells were 12% of the total cells in the bulge area, and the neural cells derived from the stem cells expressed nestin, microtubule-associated protein 2 (MAP2), and glial fibrillary acidic protein (GFAP). Interestingly, all the neural induction media supported neuronal differentiation most effectively, but treatment with serum-free medium significantly increased the number of GFAP-positive glial cells. Moreover, increasing RA concentration (≥10 μM) leads to increased cell death in the cells, but a lower concentration of RA (1 μM) treatment results in a decrease in CD34-expressing stem cells. These findings show an instructive neuronal effect of three neural induction media in HFSCs, indicating the important role of this induction media in the specification of the stem cells toward a neural phenotype.
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Affiliation(s)
- Nowruz Najafzadeh
- Research Laboratory for Embryology and Stem Cells, Department of Anatomical Sciences and Pathology, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran,
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197
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Torkamani N, Rufaut NW, Jones L, Sinclair RD. Beyond goosebumps: does the arrector pili muscle have a role in hair loss? Int J Trichology 2014; 6:88-94. [PMID: 25210331 PMCID: PMC4158628 DOI: 10.4103/0974-7753.139077] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The arrector pili muscle (APM) consists of a small band of smooth muscle that connects the hair follicle to the connective tissue of the basement membrane. The APM mediates thermoregulation by contracting to increase air-trapping, but was thought to be vestigial in humans. The APM attaches proximally to the hair follicle at the bulge, a known stem cell niche. Recent studies have been directed toward this muscle's possible role in maintaining the follicular integrity and stability. This review summarizes APM anatomy and physiology and then discusses the relationship between the follicular unit and the APM. The potential role of the APM in hair loss disorders is also described, and a model explaining APM changes in hair loss is proposed.
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Affiliation(s)
- Niloufar Torkamani
- University of Melbourne, Melbourne, Victoria, Australia ; Epworth Hospital, Melbourne, Victoria, Australia
| | - Nicholas W Rufaut
- University of Melbourne, Melbourne, Victoria, Australia ; Epworth Hospital, Melbourne, Victoria, Australia
| | - Leslie Jones
- University of Melbourne, Melbourne, Victoria, Australia ; Epworth Hospital, Melbourne, Victoria, Australia
| | - Rodney D Sinclair
- University of Melbourne, Melbourne, Victoria, Australia ; Epworth Hospital, Melbourne, Victoria, Australia
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198
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Kurata R, Futaki S, Nakano I, Tanemura A, Murota H, Katayama I, Sekiguchi K. Isolation and characterization of sweat gland myoepithelial cells from human skin. Cell Struct Funct 2014; 39:101-12. [PMID: 25196208 DOI: 10.1247/csf.14009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Stem cells routinely maintain the main epidermal components, i.e. the interfollicular epidermis, hair follicles, and sweat glands. Human sweat glands present throughout the body are glandular exocrine organs that mainly play a role in thermoregulation by sweating. Emerging evidence points to the presence of stem cells in sweat glands, but it remains unclear whether such stem cells exist in human sweat glands. Here, we attempted to gather evidence for stem cells in human sweat glands, which would be characterized by self-renewal ability and multipotency. First, we explored human sweat gland cells for expression of stem cell markers. CD29 and Notch, epidermal stem cell markers, were found to reside among α-smooth muscle actin-positive myoepithelial cells in human sweat glands. Next, sweat gland myoepithelial cells were isolated from human skin as a CD29(hi)CD49f (hi) subpopulation. The myoepithelial cell-enriched CD29(hi)CD49f (hi) subpopulation possessed the ability to differentiate into sweat gland luminal cells in sphere-forming assays. Furthermore, CD29(hi)CD49f (hi) subpopulation-derived sphere-forming cells exhibited long-term proliferative potential upon multiple passaging, indicating that the CD29(hi)CD49f (hi) myoepithelial subpopulation includes stem cells with self-renewal ability. These findings provide evidence that human sweat gland myoepithelial cells contain stem cells that possess both self-renewal ability and multipotency to differentiate into sweat glands.
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Affiliation(s)
- Ryuichiro Kurata
- Laboratory of Extracellular Matrix Biochemistry, Institute for Protein Research, Osaka University
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199
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Schepeler T, Page ME, Jensen KB. Heterogeneity and plasticity of epidermal stem cells. Development 2014; 141:2559-67. [PMID: 24961797 PMCID: PMC4067958 DOI: 10.1242/dev.104588] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The epidermis is an integral part of our largest organ, the skin, and protects us against the hostile environment. It is a highly dynamic tissue that, during normal steady-state conditions, undergoes constant turnover. Multiple stem cell populations residing in autonomously maintained compartments facilitate this task. In this Review, we discuss stem cell behaviour during normal tissue homeostasis, regeneration and disease within the pilosebaceous unit, an integral structure of the epidermis that is responsible for hair growth and lubrication of the epithelium. We provide an up-to-date view of the pilosebaceous unit, encompassing the heterogeneity and plasticity of multiple discrete stem cell populations that are strongly influenced by external cues to maintain their identity and function.
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Affiliation(s)
- Troels Schepeler
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaløes Vej 5, Copenhagen N DK-2200, Denmark
| | - Mahalia E Page
- Wellcome Trust & Medical Research Council Cambridge Stem Cell Institute, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Kim B Jensen
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaløes Vej 5, Copenhagen N DK-2200, Denmark Wellcome Trust & Medical Research Council Cambridge Stem Cell Institute, Tennis Court Road, Cambridge CB2 1QR, UK
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200
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Inui S, Itami S. A newly discovered linkage between proteoglycans and hair biology: decorin acts as an anagen inducer. Exp Dermatol 2014; 23:547-8. [DOI: 10.1111/exd.12471] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2014] [Indexed: 12/01/2022]
Affiliation(s)
- Shigeki Inui
- Department of Regenerative Dermatology; Osaka University Graduate School of Medicine; Suita Japan
| | - Satoshi Itami
- Department of Regenerative Dermatology; Osaka University Graduate School of Medicine; Suita Japan
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