151
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Yohe TT, Schramm H, Parsons CLM, Tucker HLM, Enger BD, Hardy NR, Daniels KM. Form of calf diet and the rumen. I: Impact on growth and development. J Dairy Sci 2019; 102:8486-8501. [PMID: 31279553 DOI: 10.3168/jds.2019-16449] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 05/01/2019] [Indexed: 12/29/2022]
Abstract
Preweaning diet is known to affect rumen tissue appearance at the gross level. The objectives of this experiment were to investigate effects of different preweaning diets on the growth and development of the rumen epithelium and on putative rumen epithelial stem and progenitor cell measurements at the gene and cell levels. Neonatal Holstein bull calves (n = 11) were individually housed and randomly assigned to 1 of 2 diets. The diets were milk replacer only (MRO; n = 5) or milk replacer with starter (MRS; n = 6). Diets were isoenergetic (3.87 ± 0.06 Mcal of metabolizable energy per day) and isonitrogenous (0.17 ± 0.003 kg/d of apparent digestible protein). Milk replacer was 22% crude protein, 21.5% fat (dry matter basis). The textured calf starter was 21.5% crude protein (dry matter basis). Water was available ad libitum and feed and water intake were recorded daily. Putative stem and progenitor cells were labeled by administering a thymidine analog (5-bromo-2'-deoxyuridine, BrdU; 5 mg/kg of body weight in sterile saline) for 5 consecutive days and allowed a 25-d washout period. Calves were killed at 43 ± 1 d after a 6 h exposure to a defined concentration of volatile fatty acids. We obtained rumen tissue from the ventral sac and used it for immunohistochemical analyses of BrdU (putative stem and progenitor cells) and Ki67 (cell proliferation), gene expression analysis, and morphological measurements via hematoxylin and eosin staining. Epithelial stem and progenitor cell gene markers of interest, analyzed by real-time quantitative PCR, were β1-integrin, keratin-14, notch-1, tumor protein p63, and leucine-rich repeat-containing G protein-coupled receptor 5. Body growth did not differ by diet, but empty reticulorumens were heavier in MRS calves (MRS: 0.67 ± 0.04 kg; MRO: 0.39 ± 0.04 kg). The percentage of label-retaining BrdU basale cells was higher in MRO calves than in MRS calves (2.0 ± 0.3% vs. 0.3 ± 0.2%, respectively). We observed a higher percentage of basale cells undergoing proliferation in MRS calves than in MRO calves (18.4 ± 2.6% vs. 10.8 ± 2.8%, respectively). Rumen epithelial gene expression was not affected by diet, but the submucosa was thicker in MRO calves and the epithelium and corneum/keratin layers were thicker in MRS calves. Presumptive stem and progenitor cells in the rumen epithelium were identifiable by their ability to retain labeled DNA in the long term, changed proliferative status in response to diet, and likely contributed to observed treatment differences in rumen tissue thickness.
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Affiliation(s)
- T T Yohe
- Dairy Science Department, Virginia Polytechnic Institute and State University, Blacksburg 24061
| | - H Schramm
- Virginia Maryland Regional College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg 24061
| | - C L M Parsons
- Dairy Science Department, Virginia Polytechnic Institute and State University, Blacksburg 24061
| | - H L M Tucker
- Dairy Science Department, Virginia Polytechnic Institute and State University, Blacksburg 24061
| | - B D Enger
- Dairy Science Department, Virginia Polytechnic Institute and State University, Blacksburg 24061
| | - N R Hardy
- Dairy Science Department, Virginia Polytechnic Institute and State University, Blacksburg 24061
| | - K M Daniels
- Dairy Science Department, Virginia Polytechnic Institute and State University, Blacksburg 24061.
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152
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The Yin and Yang of cancer genes. Gene 2019; 704:121-133. [DOI: 10.1016/j.gene.2019.04.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 03/21/2019] [Accepted: 04/08/2019] [Indexed: 12/31/2022]
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153
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p73 regulates epidermal wound healing and induced keratinocyte programming. PLoS One 2019; 14:e0218458. [PMID: 31216312 PMCID: PMC6583996 DOI: 10.1371/journal.pone.0218458] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 06/03/2019] [Indexed: 12/19/2022] Open
Abstract
p63 is a transcriptional regulator of ectodermal development that is required for basal cell proliferation and stem cell maintenance. p73 is a closely related p53 family member that is expressed in select p63-positive basal cells and can heterodimerize with p63. p73-/- mice lack multiciliated cells and have reduced numbers of basal epithelial cells in select tissues; however, the role of p73 in basal epithelial cells is unknown. Herein, we show that p73-deficient mice exhibit delayed wound healing despite morphologically normal-appearing skin. The delay in wound healing is accompanied by decreased proliferation and increased levels of biomarkers of the DNA damage response in basal keratinocytes at the epidermal wound edge. In wild-type mice, this same cell population exhibited increased p73 expression after wounding. Analyzing single-cell transcriptomic data, we found that p73 was expressed by epidermal and hair follicle stem cells, cell types required for wound healing. Moreover, we discovered that p73 isoforms expressed in the skin (ΔNp73) enhance p63-mediated expression of keratinocyte genes during cellular reprogramming from a mesenchymal to basal keratinocyte-like cell. We identified a set of 44 genes directly or indirectly regulated by ΔNp73 that are involved in skin development, cell junctions, cornification, proliferation, and wound healing. Our results establish a role for p73 in cutaneous wound healing through regulation of basal keratinocyte function.
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154
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De Luca M, Aiuti A, Cossu G, Parmar M, Pellegrini G, Robey PG. Advances in stem cell research and therapeutic development. Nat Cell Biol 2019; 21:801-811. [PMID: 31209293 DOI: 10.1038/s41556-019-0344-z] [Citation(s) in RCA: 139] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 05/09/2019] [Indexed: 12/12/2022]
Abstract
Despite many reports of putative stem-cell-based treatments in genetic and degenerative disorders or severe injuries, the number of proven stem cell therapies has remained small. In this Review, we survey advances in stem cell research and describe the cell types that are currently being used in the clinic or are close to clinical trials. Finally, we analyse the scientific rationale, experimental approaches, caveats and results underpinning the clinical use of such stem cells.
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Affiliation(s)
- Michele De Luca
- Center for Regenerative Medicine "Stefano Ferrari", Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy.
| | - Alessandro Aiuti
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget) and Pediatric Immunohematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy.,Vita-Salute San Raffaele University, Milan, Italy
| | - Giulio Cossu
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Malin Parmar
- Developmental and Regenerative Neurobiology, Department of Experimental Medical Science, Wallenberg Neuroscience Center, Lund, Sweden.,Lund Stem Cell Center, Lund University, Lund, Sweden
| | - Graziella Pellegrini
- Center for Regenerative Medicine "Stefano Ferrari", Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Pamela Gehron Robey
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
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155
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Hyperlipidemia induces meibomian gland dysfunction. Ocul Surf 2019; 17:777-786. [PMID: 31201956 DOI: 10.1016/j.jtos.2019.06.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 05/28/2019] [Accepted: 06/10/2019] [Indexed: 11/20/2022]
Abstract
PURPOSE To investigate the pathological changes of the meibomian gland (MG) and ocular surface in Apolipoprotein E knockout (ApoE-/-) mice and to investigate the association of meibomian gland dysfunction (MGD) with hyperlipidemia. METHODS Total plasma cholesterol was measured in different ages of ApoE-/- and wild type (WT) mice, whilst the ocular surfaces were observed by slit-lamp biomicroscopy. MG sections were subjected to H&E staining, Oil Red O staining, TUNEL assay and immunostaining. Quantitate RT-PCR and Western blot analyses were performed to detect the relative gene expression in MGs. The 5-month-old ApoE-/- mice were administered with rosiglitazone or GW9662 + rosiglitazone via oral gavage for 2 months to determine their effect on MG pathological change. RESULTS We found eyelid abnormality, MG dropout, abnormal MG acinar morphology, dilated MG duct and plugging of the MG orifice in ApoE-/- mice. MG acini in ApoE-/- mice showed exaggerated lipid accumulation. Abnormal keratinization increased in MG duct, accompanied with decreased proliferation and increased apoptosis in ApoE-/- mice. Inflammatory cells infiltrated into the surrounding microenvironment of MG acini, and the NF-κB signaling pathway was activated in MG acinar cells. Oxidative stress was evident in MG acinar cells of ApoE-/- mice. Further investigation showed downregulation of PPAR-γ in MG acinar cells of ApoE-/- mice. PPAR-γ agonist rosiglitazone treatment reduced the morbidity of eyelid, as well as corneal pathological changes and MG inflammation in ApoE-/- mice. CONCLUSION MGD and hyperlipidemia are closely associated in ApoE-/- mice, which represent a new model to study the pathophysiology of MGD related to dyslipidemia.
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156
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Gatti V, Bongiorno-Borbone L, Fierro C, Annicchiarico-Petruzzelli M, Melino G, Peschiaroli A. p63 at the Crossroads between Stemness and Metastasis in Breast Cancer. Int J Mol Sci 2019; 20:E2683. [PMID: 31159154 PMCID: PMC6600246 DOI: 10.3390/ijms20112683] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 05/27/2019] [Accepted: 05/29/2019] [Indexed: 12/20/2022] Open
Abstract
After lung cancer, breast cancer (BC) is the most frequent cause of cancer death among women, worldwide. Although advances in screening approaches and targeted therapeutic agents have decreased BC incidence and mortality, over the past five years, triple-negative breast cancer (TNBC) remains the breast cancer subtype that displays the worst prognosis, mainly due to the lack of clinically actionable targets. Genetic and molecular profiling has unveiled the high intrinsic heterogeneity of TNBC, with the basal-like molecular subtypes representing the most diffuse TNBC subtypes, characterized by the expression of basal epithelial markers, such as the transcription factor p63. In this review, we will provide a broad picture on the physiological role of p63, in maintaining the basal epithelial identity, as well as its involvement in breast cancer progression, emphasizing its relevance in tumor cell invasion and stemness.
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Affiliation(s)
- Veronica Gatti
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy.
| | | | - Claudia Fierro
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy.
| | | | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133 Rome, Italy.
- Medical Research Council, Toxicology Unit, University of Cambridge, Cambridge CB2 1PZ, UK.
| | - Angelo Peschiaroli
- National Research Council of Italy, Institute of Translational Pharmacology, 00133 Rome, Italy.
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157
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Metastasis is impaired by endothelial-specific Dll4 loss-of-function through inhibition of epithelial-to-mesenchymal transition and reduction of cancer stem cells and circulating tumor cells. Clin Exp Metastasis 2019; 36:365-380. [PMID: 31119445 DOI: 10.1007/s10585-019-09973-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 05/13/2019] [Indexed: 01/09/2023]
Abstract
Systemic inhibition of Dll4 has been shown to thoroughly reduce cancer metastasis. The exact cause of this effect and whether it is endothelial mediated remains to be clarified. Therefore, we proposed to analyze the impact of endothelial Dll4 loss-of-function on metastasis induction on three early steps of the metastatic process, regulation of epithelial-to-mesenchymal transition (EMT), cancer stem cell (CSC) frequency and circulating tumor cell (CTC) number. For this, Lewis Lung Carcinoma (LLC) cells were used to model mouse tumor metastasis in vivo, by subcutaneous transplantation into endothelial-specific Dll4 loss-of-function mice. We observed that endothelial-specific Dll4 loss-of-function is responsible for the tumor vascular regression that leads to the reduction of tumor burden. It induces an increase in tumoral blood vessel density, but the neovessels are poorly perfused, with increased leakage and reduced perivascular maturation. Unexpectedly, although hypoxia was increased in the tumor, the number and burden of macro-metastasis was significantly reduced. This is likely to be a consequence of the observed reduction in both EMT and CSC numbers caused by the endothelial-specific Dll4 loss-of-function. This multifactorial context may explain the concomitantly observed reduction of the circulating tumor cell count. Furthermore, our results suggest that endothelial Dll4/Notch-function mediates tumor hypoxia-driven increase of EMT. Therefore, it appears that endothelial Dll4 may constitute a promising target to prevent metastasis.
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158
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De Rosa L, Secone Seconetti A, De Santis G, Pellacani G, Hirsch T, Rothoeft T, Teig N, Pellegrini G, Bauer JW, De Luca M. Laminin 332-Dependent YAP Dysregulation Depletes Epidermal Stem Cells in Junctional Epidermolysis Bullosa. Cell Rep 2019; 27:2036-2049.e6. [PMID: 31091444 DOI: 10.1016/j.celrep.2019.04.055] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/12/2019] [Accepted: 04/10/2019] [Indexed: 01/09/2023] Open
Abstract
Laminin 332-deficient junctional epidermolysis bullosa (JEB) is a severe genetic skin disease. JEB is marked by epidermal stem cell depletion, the origin of which is unknown. We show that dysregulation of the YAP and TAZ pathway underpins such stem cell depletion. Laminin 332-mediated YAP activity sustains human epidermal stem cells, detected as holoclones. Ablation of YAP selectively depletes holoclones, while enforced YAP blocks conversion of stem cells into progenitors and indefinitely extends the keratinocyte lifespan. YAP is dramatically decreased in JEB keratinocytes, which contain only phosphorylated, inactive YAP. In normal keratinocytes, laminin 332 and α6β4 ablation abolish YAP activity and recapitulate the JEB phenotype. In JEB keratinocytes, laminin 332-gene therapy rescues YAP activity and epidermal stem cells in vitro and in vivo. In JEB cells, enforced YAP recapitulates laminin 332-gene therapy, thus uncoupling adhesion from proliferation in epidermal stem cells. This work has important clinical implication for ex vivo gene therapy of JEB.
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Affiliation(s)
- Laura De Rosa
- Centre for Regenerative Medicine "Stefano Ferrari," Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Alessia Secone Seconetti
- Centre for Regenerative Medicine "Stefano Ferrari," Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Giorgio De Santis
- Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Giovanni Pellacani
- Department of Surgery, Medicine, Dentistry, and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Tobias Hirsch
- Department of Plastic Surgery, Burn Centre, BG University Hospital Bergmannsheil, Ruhr-University Bochum, Germany
| | - Tobias Rothoeft
- Department of Neonatology and Pediatric Intensive Care, University Children's Hospital, Ruhr-University Bochum, Germany
| | - Norbert Teig
- Department of Neonatology and Pediatric Intensive Care, University Children's Hospital, Ruhr-University Bochum, Germany
| | - Graziella Pellegrini
- Centre for Regenerative Medicine "Stefano Ferrari," Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy; Department of Surgery, Medicine, Dentistry, and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Johann W Bauer
- EB House Austria and Department of Dermatology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Michele De Luca
- Centre for Regenerative Medicine "Stefano Ferrari," Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy.
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159
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Chen YC, Liao BK, Lu YF, Liu YH, Hsieh FC, Hwang PP, Hwang SPL. Zebrafish Klf4 maintains the ionocyte progenitor population by regulating epidermal stem cell proliferation and lateral inhibition. PLoS Genet 2019; 15:e1008058. [PMID: 30933982 PMCID: PMC6459544 DOI: 10.1371/journal.pgen.1008058] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 04/11/2019] [Accepted: 02/28/2019] [Indexed: 01/06/2023] Open
Abstract
In the skin and gill epidermis of fish, ionocytes develop alongside keratinocytes and maintain body fluid ionic homeostasis that is essential for adaptation to environmental fluctuations. It is known that ionocyte progenitors in zebrafish embryos are specified from p63+ epidermal stem cells through a patterning process involving DeltaC (Dlc)-Notch-mediated lateral inhibition, which selects scattered dlc+ cells into the ionocyte progenitor fate. However, mechanisms by which the ionocyte progenitor population is modulated remain unclear. Krüppel-like factor 4 (Klf4) transcription factor was previously implicated in the terminal differentiation of mammalian skin epidermis and is known for its bifunctional regulation of cell proliferation in a tissue context-dependent manner. Here, we report novel roles for zebrafish Klf4 in the ventral ectoderm during embryonic skin development. We found that Klf4 was expressed in p63+ epidermal stem cells of the ventral ectoderm from 90% epiboly onward. Knockdown or knockout of klf4 expression reduced the proliferation rate of p63+ stem cells, resulting in decreased numbers of p63+ stem cells, dlc-p63+ keratinocyte progenitors and dlc+ p63+ ionocyte progenitor cells. These reductions subsequently led to diminished keratinocyte and ionocyte densities and resulted from upregulation of the well-known cell cycle regulators, p53 and cdkn1a/p21. Moreover, mutation analyses of the KLF motif in the dlc promoter, combined with VP16-klf4 or engrailed-klf4 mRNA overexpression analyses, showed that Klf4 can bind the dlc promoter and modulate lateral inhibition by directly repressing dlc expression. This idea was further supported by observing the lateral inhibition outcomes in klf4-overexpressing or knockdown embryos. Overall, our experiments delineate novel roles for zebrafish Klf4 in regulating the ionocyte progenitor population throughout early stem cell stage to initiation of terminal differentiation, which is dependent on Dlc-Notch-mediated lateral inhibition.
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Affiliation(s)
- Yi-Chung Chen
- Institute of Cellular and Organismic Biology (ICOB), Academia Sinica, Taipei, Taiwan, Republic of China
| | - Bo-Kai Liao
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, Republic of China
| | - Yu-Fen Lu
- Institute of Cellular and Organismic Biology (ICOB), Academia Sinica, Taipei, Taiwan, Republic of China
| | - Yu-Hsiu Liu
- Institute of Cellular and Organismic Biology (ICOB), Academia Sinica, Taipei, Taiwan, Republic of China
- Department of Life Science, National Taiwan University, Taipei, Taiwan, Republic of China
| | - Fang-Chi Hsieh
- Institute of Cellular and Organismic Biology (ICOB), Academia Sinica, Taipei, Taiwan, Republic of China
- Graduate Institute of Life Sciences, National Defense Medical Center, Taiwan, Republic of China
| | - Pung-Pung Hwang
- Institute of Cellular and Organismic Biology (ICOB), Academia Sinica, Taipei, Taiwan, Republic of China
| | - Sheng-Ping L. Hwang
- Institute of Cellular and Organismic Biology (ICOB), Academia Sinica, Taipei, Taiwan, Republic of China
- Department of Life Science, National Taiwan University, Taipei, Taiwan, Republic of China
- Graduate Institute of Life Sciences, National Defense Medical Center, Taiwan, Republic of China
- * E-mail:
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160
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Brock CK, Wallin ST, Ruiz OE, Samms KM, Mandal A, Sumner EA, Eisenhoffer GT. Stem cell proliferation is induced by apoptotic bodies from dying cells during epithelial tissue maintenance. Nat Commun 2019; 10:1044. [PMID: 30837472 PMCID: PMC6400930 DOI: 10.1038/s41467-019-09010-6] [Citation(s) in RCA: 108] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 02/13/2019] [Indexed: 12/15/2022] Open
Abstract
Epithelial tissues require the removal and replacement of damaged cells to sustain a functional barrier. Dying cells provide instructive cues that can influence surrounding cells to proliferate, but how these signals are transmitted to their healthy neighbors to control cellular behaviors during tissue homeostasis remains poorly understood. Here we show that dying stem cells facilitate communication with adjacent stem cells by caspase-dependent production of Wnt8a-containing apoptotic bodies to drive cellular turnover in living epithelia. Basal stem cells engulf apoptotic bodies, activate Wnt signaling, and are stimulated to divide to maintain tissue-wide cell numbers. Inhibition of either cell death or Wnt signaling eliminated the apoptosis-induced cell division, while overexpression of Wnt8a signaling combined with induced cell death led to an expansion of the stem cell population. We conclude that ingestion of apoptotic bodies represents a regulatory mechanism linking death and division to maintain overall stem cell numbers and epithelial tissue homeostasis. Damaged epithelial tissues are known to compensate for cell death through compensatory cell divisions to maintain epithelial integrity. Here, the authors show in living epithelia that dying cells stimulate adjacent stem cells to divide through caspase-dependent production of Wnt8a-containing apoptotic bodies.
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Affiliation(s)
- Courtney K Brock
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Stephen T Wallin
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Oscar E Ruiz
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Krystin M Samms
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Amrita Mandal
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Elizabeth A Sumner
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - George T Eisenhoffer
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA. .,Genetics and Epigenetics Graduate Program, The University of Texas Graduate School of Biomedical Sciences at Houston, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
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161
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Bhattacharya S, Serror L, Nir E, Dhiraj D, Altshuler A, Khreish M, Tiosano B, Hasson P, Panman L, Luxenburg C, Aberdam D, Shalom-Feuerstein R. SOX2 Regulates P63 and Stem/Progenitor Cell State in the Corneal Epithelium. Stem Cells 2019; 37:417-429. [PMID: 30548157 PMCID: PMC6850148 DOI: 10.1002/stem.2959] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/07/2018] [Accepted: 11/24/2018] [Indexed: 11/22/2022]
Abstract
Mutations in key transcription factors SOX2 and P63 were linked with developmental defects and postnatal abnormalities such as corneal opacification, neovascularization, and blindness. The latter phenotypes suggest that SOX2 and P63 may be involved in corneal epithelial regeneration. Although P63 has been shown to be a key regulator of limbal stem cells, the expression pattern and function of SOX2 in the adult cornea remained unclear. Here, we show that SOX2 regulates P63 to control corneal epithelial stem/progenitor cell function. SOX2 and P63 were co‐expressed in the stem/progenitor cell compartments of the murine cornea in vivo and in undifferentiated human limbal epithelial stem/progenitor cells in vitro. In line, a new consensus site that allows SOX2‐mediated regulation of P63 enhancer was identified while repression of SOX2 reduced P63 expression, suggesting that SOX2 is upstream to P63. Importantly, knockdown of SOX2 significantly attenuated cell proliferation, long‐term colony‐forming potential of stem/progenitor cells, and induced robust cell differentiation. However, this effect was reverted by forced expression of P63, suggesting that SOX2 acts, at least in part, through P63. Finally, miR‐450b was identified as a direct repressor of SOX2 that was required for SOX2/P63 downregulation and cell differentiation. Altogether, we propose that SOX2/P63 pathway is an essential regulator of corneal stem/progenitor cells while mutations in SOX2 or P63 may disrupt epithelial regeneration, leading to loss of corneal transparency and blindness. Stem Cells2019;37:417–429
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Affiliation(s)
- Swarnabh Bhattacharya
- Department of Genetics and Developmental Biology, The Rappaport Faculty of Medicine and Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
| | - Laura Serror
- Department of Genetics and Developmental Biology, The Rappaport Faculty of Medicine and Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
| | - Eshkar Nir
- Department of Genetics and Developmental Biology, The Rappaport Faculty of Medicine and Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
| | - Dalbir Dhiraj
- MRC Toxicology Unit, University of Leicester, Leicester, United Kingdom
| | - Anna Altshuler
- Department of Genetics and Developmental Biology, The Rappaport Faculty of Medicine and Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
| | - Maroun Khreish
- Department of Ophthalmology, Hillel Yaffe Medical Center, Hadera, Israel
| | - Beatrice Tiosano
- Department of Ophthalmology, Hillel Yaffe Medical Center, Hadera, Israel
| | - Peleg Hasson
- Department of Genetics and Developmental Biology, The Rappaport Faculty of Medicine and Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
| | - Lia Panman
- MRC Toxicology Unit, University of Leicester, Leicester, United Kingdom
| | - Chen Luxenburg
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Daniel Aberdam
- INSERM U976 and Université Paris-Diderot, Hôpital St-Louis, Paris, France
| | - Ruby Shalom-Feuerstein
- Department of Genetics and Developmental Biology, The Rappaport Faculty of Medicine and Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
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162
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Boecker W, Reusch M, Mielke V, Reusch U, Loening T, Tiemann M, Buchwalow I. Spatial analysis of p63, K5 and K7 defines two groups of progenitor cells that differentially contribute to the maintenance of normal sebaceous glands, extraocular sebaceous carcinoma and benign sebaceous tumors. J Dermatol 2019; 46:249-258. [PMID: 30663115 DOI: 10.1111/1346-8138.14765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 11/29/2018] [Indexed: 01/18/2023]
Abstract
The histogenesis of extraocular sebaceous carcinomas is - in contrast to ocular sebaceous carcinomas - unclear, and information about the exact cellular architecture of these lesions and even of the normal sebaceous gland is still scarce. This study attempts to elucidate the histogenesis of sebaceous tumors, using multicolor immunofluorescence stainings to analyze 21 cases of sebaceous tumors (six each of extraocular sebaceous carcinoma, sebaceous adenoma and sebaceoma, and three cases of steatocystomas) and eight cases of normal sebaceous glands for p63, several keratins, androgen receptor, adipophilin, epithelial membrane antigen (EMA) and Ki-67. The data of this observational study provide evidence for the existence of two subpopulations of progenitors in normal sebaceous glands: (i) p63+ K5+ progenitors which generate the K10+ luminal cells of sebaceous ducts; and (ii) p63+ K5+ K7+ progenitors which finally generate K7+ adipophilin+ EMA+ sebocytes. Without exception, all types of sebaceous tumors contained p63+ K5+ cells. Furthermore, these tumors showed a cellular hierarchy and differentiation to adipophilin+ and/or EMA+ mature sebocytes and to K10+ ductal cells through intermediary cells. Notably, a considerable number of sebaceous tumors lack the K7 pathway of cell maintenance in the normal sebaceous lobule. Based on our data, we propose a cellular algorithmic model of the hierarchy of normal sebaceous glands and of sebocytic tumors in which p63+ K5+ cells play a major role.
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Affiliation(s)
- Werner Boecker
- Gerhard-Domagk-Institute of Pathology, University of Muenster, Muenster, Germany.,Dermatopathology Laboratory, Hamburg, Germany.,Gerhard-Seifert Reference Center for Gyneco-, Oral- and Breast Pathology, Hamburg, Germany
| | | | | | | | - Thomas Loening
- Dermatopathology Laboratory, Hamburg, Germany.,Gerhard-Seifert Reference Center for Gyneco-, Oral- and Breast Pathology, Hamburg, Germany
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163
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Follicular cell lineage in persistent ultimobranchial remnants of mammals. Cell Tissue Res 2019; 376:1-18. [PMID: 30617614 DOI: 10.1007/s00441-018-02982-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 12/14/2018] [Indexed: 02/07/2023]
Abstract
It has been a subject of much debate whether thyroid follicular cells originate from the ultimobranchial body, in addition to median thyroid primordium. Ultimobranchial remnants are detected in normal dogs, rats, mice, cattle, bison and humans and also in mutant mice such as Eya1 homozygotes, Hox3 paralogs homozygotes, Nkx2.1 heterozygotes and FRS2α2F/2F. Besides C cells, follicular cell lineages immunoreactive for thyroglobulin are located within these ultimobranchial remnants. In dogs, the C cell complexes, i.e., large cell clusters consisting of C cells and undifferentiated cells, are present together with parathyroid IV and thymus IV in or close to the thyroid lobe. In addition, follicular cells in various stages of differentiation, including follicular cell groups and primitive and minute follicles storing colloid, are intermingled with C cells in some complexes. This review elaborates the transcription factors and signaling molecules involved in folliculogenesis and it is supposed why the follicular cells in the ultimobranchial remnants are sustained in immature stages. Pax8, a transcription factor crucial for the development of follicular cells, is expressed in the fourth pharyngeal pouch and the ultimobranchial body in human embryos. Pax8 expression is also detected in the ultimobranchial remnants of Eya1 and Hes1 null mutant mice. To determine whether the C cells and follicular cells in the ultimobranchial remnants consist of dual lineage cells or are derived from the common precursor, the changes of undifferentiated cells in dog C cell complexes are examined after chronically induced hypercalcemia or antithyroid drug treatment.
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164
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Wang L, Xia W, Chen H, Xiao ZX. ΔNp63α modulates phosphorylation of p38 MAP kinase in regulation of cell cycle progression and cell growth. Biochem Biophys Res Commun 2019; 509:784-789. [PMID: 30635119 DOI: 10.1016/j.bbrc.2018.12.185] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 12/30/2018] [Indexed: 02/03/2023]
Abstract
p53-related p63 plays a critical role in regulation of cell proliferation, survival and cell differentiation. Dysregulation of p63 functions results in a disruption of a variety of normal biological processes, including stem cell biology, embryonic development, aging and tumorigenesis. ΔNp63α, a predominantly expressed p63 protein isoform in epithelial cells, plays a crucial role in regulation of cell cycle progression and cell growth. p38 MAP kinases (p38MAPK) are the members of mitogen-activated protein kinases family and are critical in regulation of cell survival in response to stress signals. In this study, we show that ectopic expression of ΔNp63α inhibited phosphorylation of p38MAPK. Acute knockdown of p63 led to a significant upregulation of p38MAPK phosphorylation, resulting in increased p21cip1/waf1 expression, reduced phosphorylation of retinoblastoma protein (RB), cell cycle G1 arrest and cell growth retardation. Restoration of ΔNp63α expression reversed cell cycle arrest and growth inhibition induced by p63 ablation. Pharmacological inhibition of p38MAPK significantly suppressed ΔNp63α ablation-induced cell cycle G1/S arrest. In addition, MAP Kinase Phosphatase 3 (MKP3) was responsible for ΔNp63α-mediated regulation of p38MAPK phosphorylation. Together, these results suggest that ΔNp63α-MPK3-p38MAPK signaling pathway plays an important role in cell cycle progression and cell growth.
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Affiliation(s)
- Liang Wang
- Center of Growth, Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment, Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, China
| | - Wanqiang Xia
- Center of Growth, Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment, Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, China
| | - Hu Chen
- Center of Growth, Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment, Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, China
| | - Zhi-Xiong Xiao
- Center of Growth, Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment, Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, China.
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165
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Suzuki D, Pinto F, Senoo M. Promotion of Human Epidermal Keratinocyte Expansion in Feeder Cell Co-culture. Methods Mol Biol 2019; 1993:15-31. [PMID: 31148075 DOI: 10.1007/978-1-4939-9473-1_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Co-culture of human epidermal keratinocytes with mouse 3T3-J2 feeder cells, developed by Green and colleagues, has been used worldwide to generate skin autografts since the early 1980s. In addition, co-culture with 3T3-J2 cells has served as a fundamental tool in skin stem cell biology as it allows the evaluation of self-renewal capacity of epidermal stem cells. This chapter describes a recent improvement in the Green method to promote further the expansion of human epidermal keratinocytes utilizing a small-molecule inhibitor of TGF-β signaling. This new protocol enables more rapid expansion of human epidermal keratinocytes in co-culture with not only 3T3-J2 cells but also other feeder cells including human dermal fibroblasts and human preadipocytes, two major alternatives to 3T3-J2 cells, with a long-term goal of developing customized skin autografts.
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Affiliation(s)
- Daisuke Suzuki
- Department of Molecular and Cell Biology, Boston University Henry M. Goldman School of Dental Medicine, Boston, MA, USA
| | - Filipa Pinto
- Department of Molecular and Cell Biology, Boston University Henry M. Goldman School of Dental Medicine, Boston, MA, USA
| | - Makoto Senoo
- Department of Molecular and Cell Biology, Boston University Henry M. Goldman School of Dental Medicine, Boston, MA, USA.
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166
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Long-Term Expansion of Mouse Primary Epidermal Keratinocytes Using a TGF-β Signaling Inhibitor. Methods Mol Biol 2019; 1993:47-59. [PMID: 31148077 DOI: 10.1007/978-1-4939-9473-1_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Mouse models have been used to study the physiology and pathogenesis of the skin. However, propagation of mouse primary epidermal keratinocytes remains challenging. In this chapter, we introduce a newly developed protocol that enables long-term expansion of p63+ mouse epidermal keratinocytes in low-Ca2+ media without the need of progenitor cell purification steps or support by a feeder cell layer. Pharmacological inhibition of TGF-β signaling in crude preparations of mouse epidermis robustly increases proliferative capacity of p63+ epidermal progenitor cells while preserving their ability to differentiate. Suppression of TGF-β signaling also permits p63+ epidermal keratinocytes to form macroscopically large clones in 3T3-J2 feeder cell co-culture. This simple and efficient approach will facilitate the use of mouse models by providing p63+ primary epidermal keratinocytes in quantity.
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167
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Xian W, Duleba M, Yamamoto Y, Vincent M, McKeon F. Biobanking Organoids or Ground-State Stem Cells? J Clin Med 2018; 7:E555. [PMID: 30558346 PMCID: PMC6306851 DOI: 10.3390/jcm7120555] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 12/05/2018] [Accepted: 12/13/2018] [Indexed: 12/16/2022] Open
Abstract
Autologous transplantation of human epidermal stem cells cultured in Green's method is one of the first examples of utilizing adult stem cells in regenerative medicine. Using the same method, we cloned p63-expressing distal airway stem cells and showed their essential role in lung regeneration in a mouse model of acute respiratory distress syndrome. However, adult stem cells of columnar epithelial tissues had until recently evaded all attempts at cloning. To address this issue, we developed a novel technology that enabled cloning ground-state stem cells of the columnar epithelium. The adaption of this technology to clone stem cells of cancer precursors furthered our understanding of the dynamics of processes such as clonal evolution and dominance in Barrett's esophagus, as well as for testing platforms for chemical screening. Taken together, the properties of these ground-state stem cells, including unlimited propagation, genomic stability, and regio-specificity, make them ideal for regenerative medicine, disease modeling and drug discovery.
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Affiliation(s)
- Wa Xian
- Institute of Molecular Medicine, McGovern Medical School of University of Texas Health Science Center, Houston, TX 77030, USA.
- Department of Biochemistry and Molecular Biology, University of Texas McGovern Medical School, Houston, TX 77030, USA.
| | - Marcin Duleba
- Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA.
| | - Yusuke Yamamoto
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo 1040045, Japan.
| | | | - Frank McKeon
- Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA.
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168
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Mollo MR, Cirillo L, Russo C, Antonini D, Missero C. Functional and Mechanistic Insights into the Pathogenesis of P63-Associated Disorders. J Investig Dermatol Symp Proc 2018; 19:S98-S100. [PMID: 30471766 DOI: 10.1016/j.jisp.2018.10.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The p53 family member p63 is a master regulator of gene expression in stratified epithelia, such as the epidermis. One of the main functions of p63 is to sustain mechanical resistance, positively regulating several epidermal genes involved in cell-matrix adhesion and cell-cell adhesion (Ferone et al., 2015).
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Affiliation(s)
| | | | - Claudia Russo
- Center for Genetic Engineering, Napoli, Italy; European School of Molecular Medicine, University of Milan, Italy
| | - Dario Antonini
- Center for Genetic Engineering, Napoli, Italy; Department of Biology, University of Naples Federico II, Napoli, Italy
| | - Caterina Missero
- Center for Genetic Engineering, Napoli, Italy; Department of Biology, University of Naples Federico II, Napoli, Italy.
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169
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Fessé P, Qvarnström F, Nyman J, Hermansson I, Ahlgren J, Turesson I. UV-Radiation Response Proteins Reveal Undifferentiated Cutaneous Interfollicular Melanocytes with Hyperradiosensitivity to Differentiation at 0.05 Gy Radiotherapy Dose Fractions. Radiat Res 2018; 191:93-106. [PMID: 30407899 DOI: 10.1667/rr15078.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To date, the response activated in melanocytes by repeated genotoxic insults from radiotherapy has not been explored. We hypothesized that the molecular pathways involved in the response of melanocytes to ionizing radiation and ultraviolet radiation (UVR) are similar. Skin punch biopsies, not sun-exposed, were collected from prostate cancer patients before, as well as at 1 and 6.5 weeks after daily doses of 0.05-1.1 Gy. Interfollicular melanocytes were identified by ΔNp63- and eosin-periodic acid Schiff staining. Immunohistochemistry and immunofluorescence were performed to detect molecular markers of the melanocyte lineage. Melanocytes were negative for ΔNp63, and the number remained unchanged over the treatment period. At radiation doses as low as 0.05 Gy, melanocytes express higher protein levels of microphthalmia-associated transcription factor (MITF) and Bcl-2. Subsets of MITF- and Bcl-2-negative melanocytes were identified among interfollicular melanocytes in unexposed skin; the cell number in both subsets was reduced after irradiation in a way that indicates low-dose hyperradiosensitivity. A corresponding increase in MITF- and Bcl-2-positive cells was observed. PAX3 and SOX10 co-localized to some extent with MITF in unexposed skin, more so with radiation exposure. Low doses of ionizing radiation also intensified c-KIT and DCT staining. Nuclear p53 and p21 were undetectable in melanocytes. Apoptosis and proliferation could not be observed. In conclusion, undifferentiated interfollicular melanocytes were identified, and responded with differentiation in a hypersensitive manner at 0.05 Gy doses. Radioresistance regarding cell death was maintained up to fractionated doses of 1.1 Gy, applied for 7 weeks. The results suggest that the initial steps of melanin synthesis are common to ionizing radiation and UVR, and underline the importance of keratinocyte-melanocyte interaction behind hyperpigmentation and depigmentation to radiotherapy.
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Affiliation(s)
- Per Fessé
- a Centre for Research and Development, Uppsala University/Region Gävleborg, Gävle, Sweden.,b Department of Immunology, Genetics and Pathology, Experimental and Clinical Oncology, Uppsala University, Uppsala, Sweden
| | - Fredrik Qvarnström
- b Department of Immunology, Genetics and Pathology, Experimental and Clinical Oncology, Uppsala University, Uppsala, Sweden
| | - Jan Nyman
- c Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden and
| | - Ingegerd Hermansson
- c Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden and
| | - Johan Ahlgren
- d Department of Oncology, Faculty of Medicine and Health, Örebro University, Örebro Sweden
| | - Ingela Turesson
- b Department of Immunology, Genetics and Pathology, Experimental and Clinical Oncology, Uppsala University, Uppsala, Sweden
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170
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Pattison JM, Melo SP, Piekos SN, Torkelson JL, Bashkirova E, Mumbach MR, Rajasingh C, Zhen HH, Li L, Liaw E, Alber D, Rubin AJ, Shankar G, Bao X, Chang HY, Khavari PA, Oro AE. Retinoic acid and BMP4 cooperate with p63 to alter chromatin dynamics during surface epithelial commitment. Nat Genet 2018; 50:1658-1665. [PMID: 30397335 PMCID: PMC6265075 DOI: 10.1038/s41588-018-0263-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 09/21/2018] [Indexed: 01/14/2023]
Abstract
Human embryonic stem cell (hESC) differentiation promises advances in regenerative medicine1–3, yet conversion into transplantable tissues remains poorly understood. Using our keratinocyte differentiation system, we employ a multi-dimensional genomics approach to interrogate the contributions of inductive morphogens retinoic acid (RA) and bone morphogenetic protein 4 (BMP4) and the epidermal master regulator p634,5 during surface ectoderm commitment. In contrast to other master regulators6–9, p63 effects major transcriptional changes only after morphogens alter chromatin accessibility, establishing an epigenetic landscape for p63 to modify. p63 distally closes chromatin accessibility and promotes accumulation of H3K27me3 modifications. Cohesin HiChIP10 visualizations of chromosome conformation reveal that p63 and the morphogens contribute to dynamic long-range chromatin interactions, as illustrated with TFAP2C regulation11. Our study demonstrates the unexpected dependency of p63 on morphogenetic signaling and provides novel insights into how a master regulator can specify diverse transcriptional programs based on the chromatin landscape induced by specific morphogen exposure.
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Affiliation(s)
- Jillian M Pattison
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Sandra P Melo
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA.,Agilent Technologies, Santa Clara, CA, USA
| | - Samantha N Piekos
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Jessica L Torkelson
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Elizaveta Bashkirova
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA.,Columbia Stem Cell Initiative, Columbia University Medical Center, New York, NY, USA
| | - Maxwell R Mumbach
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA.,Center for Personal Dynamic Regulomes, Stanford, CA, USA
| | - Charlotte Rajasingh
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Hanson Hui Zhen
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Lingjie Li
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Eric Liaw
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA.,David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Daniel Alber
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Adam J Rubin
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Gautam Shankar
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Xiaomin Bao
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA.,Departments of Molecular Sciences and Dermatology, Northwestern University, Evanston, IL, USA
| | - Howard Y Chang
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA.,Center for Personal Dynamic Regulomes, Stanford, CA, USA.,Howard Hughes Medical Institute, Stanford University, Stanford, CA, USA
| | - Paul A Khavari
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Anthony E Oro
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA.
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171
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Choo MK, Kraft S, Missero C, Park JM. The protein kinase p38α destabilizes p63 to limit epidermal stem cell frequency and tumorigenic potential. Sci Signal 2018; 11:11/551/eaau0727. [PMID: 30301786 DOI: 10.1126/scisignal.aau0727] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The molecular circuitry directing tissue development and homeostasis is hardwired by genetic programs but may also be subject to fine-tuning or major modification by environmental conditions. It remains unclear whether such malleability is at work-particularly in tissues directly in contact with the environment-and contributes to their optimal maintenance and resilience. The protein kinase p38α is activated by physiological cues that signal tissue damage and neoplastic transformation. Here, we found that p38α phosphorylated and thereby destabilized p63, a transcription factor essential for epidermal development. Through this regulatory mechanism, p38α limited the frequency of keratinocytes with stem cell properties and tumorigenic potential. Correspondingly, epidermal loss of p38α expression or activity promoted or correlated with carcinogenesis in mouse and human skin, respectively. Genetic mouse models revealed a tumorigenic mechanism from p38α loss through p63-mediated suppression of the matrix metalloprotease MMP13. These findings illustrate a previously uncharacterized epidermal tumor-suppressive mechanism in which stress-activated signaling induces the contraction of stem cell-like keratinocyte pools.
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Affiliation(s)
- Min-Kyung Choo
- Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Stefan Kraft
- Department of Pathology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Caterina Missero
- CEINGE Biotecnologie Avanzate, 80145 Napoli, Italy.,Department of Biology, University of Naples Federico II, 80126 Napoli, Italy
| | - Jin Mo Park
- Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA.
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172
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Singarapu N, Ma K, Reeh KAG, Shen J, Lancaster JN, Yi S, Xie H, Orkin SH, Manley NR, Ehrlich LIR, Jiang N, Richie ER. Polycomb Repressive Complex 2 is essential for development and maintenance of a functional TEC compartment. Sci Rep 2018; 8:14335. [PMID: 30254371 PMCID: PMC6156232 DOI: 10.1038/s41598-018-32729-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 09/12/2018] [Indexed: 12/15/2022] Open
Abstract
Thymic epithelial cells (TEC) are essential for thymocyte differentiation and repertoire selection. Despite their indispensable role in generating functional T cells, the molecular mechanisms that orchestrate TEC development from endodermal progenitors in the third pharyngeal pouch (3rd PP) are not fully understood. We recently reported that the T-box transcription factor TBX1 negatively regulates TEC development. Although initially expressed throughout the 3rd PP, Tbx1 becomes downregulated in thymus-fated progenitors and when ectopically expressed impairs TEC progenitor proliferation and differentiation. Here we show that ectopic Tbx1 expression in thymus fated endoderm increases expression of Polycomb repressive complex 2 (PRC2) target genes in TEC. PRC2 is an epigenetic modifier that represses gene expression by catalyzing trimethylation of lysine 27 on histone H3. The increased expression of PRC2 target genes suggests that ectopic Tbx1 interferes with PRC2 activity and implicates PRC2 as an important regulator of TEC development. To test this hypothesis, we used Foxn1Cre to delete Eed, a PRC2 component required for complex stability and function in thymus fated 3rd PP endoderm. Proliferation and differentiation of fetal and newborn TEC were disrupted in the conditional knockout (EedCKO) mutants leading to severely dysplastic adult thymi. Consistent with PRC2-mediated transcriptional silencing, the majority of differentially expressed genes (DEG) were upregulated in EedCKO TEC. Moreover, a high frequency of EedCKO DEG overlapped with DEG in TEC that ectopically expressed Tbx1. These findings demonstrate that PRC2 plays a critical role in TEC development and suggest that Tbx1 expression must be downregulated in thymus fated 3rd PP endoderm to ensure optimal PRC2 function.
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Affiliation(s)
- Nandini Singarapu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Science Park, Smithville, Texas, 78957, USA
| | - Keyue Ma
- Department of Biomedical Engineering, Cockrell School of Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Kaitlin A G Reeh
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Science Park, Smithville, Texas, 78957, USA
| | - Jianjun Shen
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Science Park, Smithville, Texas, 78957, USA
| | - Jessica N Lancaster
- Department of Molecular Biosciences, Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Song Yi
- Department of Oncology, Dell Medical School and Department of Biomedical Engineering, Cockrell School of Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.,Livestrong Cancer Institutes, Dell Medical School, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Huafeng Xie
- Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, 02115, USA.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, 02115, USA
| | - Stuart H Orkin
- Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, 02115, USA.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, 02115, USA.,Harvard Stem Cell Institute, Harvard University, Cambridge, MA, 02138, USA.,Howard Hughes Medical Institute, Boston, MA, 02115, USA
| | - Nancy R Manley
- Department of Genetics, Paul D. Coverdell Center, 500 DW Brooks Drive, University of Georgia, Athens, GA, 30602, USA
| | - Lauren I R Ehrlich
- Department of Molecular Biosciences, Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX, 78712, USA.,Livestrong Cancer Institutes, Dell Medical School, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Ning Jiang
- Department of Biomedical Engineering, Cockrell School of Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Ellen R Richie
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Science Park, Smithville, Texas, 78957, USA.
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173
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Song EAC, Min S, Oyelakin A, Smalley K, Bard JE, Liao L, Xu J, Romano RA. Genetic and scRNA-seq Analysis Reveals Distinct Cell Populations that Contribute to Salivary Gland Development and Maintenance. Sci Rep 2018; 8:14043. [PMID: 30232460 PMCID: PMC6145895 DOI: 10.1038/s41598-018-32343-z] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 09/06/2018] [Indexed: 02/06/2023] Open
Abstract
Stem and progenitor cells of the submandibular salivary gland (SMG) give rise to, maintain, and regenerate the multiple lineages of mature epithelial cells including those belonging to the ductal, acinar, basal and myoepithelial subtypes. Here we have exploited single cell RNA-sequencing and in vivo genetic lineage tracing technologies to generate a detailed map of the cell fate trajectories and branch points of the basal and myoepithelial cell populations of the mouse SMG during embryonic development and in adults. Our studies show that the transcription factor p63 and alpha-smooth muscle actin (SMA) serve as faithful markers of the basal and myoepithelial cell lineages, respectively and that both cell types are endowed with progenitor cell properties. However, p63+ basal and SMA+ myoepithelial cells exhibit distinct cell fates by virtue of maintaining different cellular lineages during morphogenesis and in adults. Collectively, our results reveal the dynamic and complex nature of the diverse SMG cell populations and highlight the distinct differentiation potential of the p63 and SMA expressing subtypes in the stem and progenitor cell hierarchy. Long term these findings have profound implications towards a better understanding of the molecular mechanisms that dictate lineage commitment and differentiation programs during development and adult gland maintenance.
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Affiliation(s)
- Eun-Ah Christine Song
- 0000 0004 1936 9887grid.273335.3Department of Oral Biology, School of Dental Medicine, State University of New York at Buffalo, Buffalo, New York 14214 USA
| | - Sangwon Min
- 0000 0004 1936 9887grid.273335.3Department of Oral Biology, School of Dental Medicine, State University of New York at Buffalo, Buffalo, New York 14214 USA
| | - Akinsola Oyelakin
- 0000 0004 1936 9887grid.273335.3Department of Oral Biology, School of Dental Medicine, State University of New York at Buffalo, Buffalo, New York 14214 USA
| | - Kirsten Smalley
- 0000 0004 1936 9887grid.273335.3Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, New York 14203 USA
| | - Jonathan E. Bard
- 0000 0004 1936 9887grid.273335.3Genomics and Bioinformatics Core, State University of New York at Buffalo, Buffalo, New York 14222 USA
| | - Lan Liao
- 0000 0001 2160 926Xgrid.39382.33Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030 USA
| | - Jianming Xu
- 0000 0001 2160 926Xgrid.39382.33Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030 USA
| | - Rose-Anne Romano
- 0000 0004 1936 9887grid.273335.3Department of Oral Biology, School of Dental Medicine, State University of New York at Buffalo, Buffalo, New York 14214 USA ,0000 0004 1936 9887grid.273335.3Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, New York 14203 USA
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174
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Fan X, Wang D, Burgmaier JE, Teng Y, Romano RA, Sinha S, Yi R. Single Cell and Open Chromatin Analysis Reveals Molecular Origin of Epidermal Cells of the Skin. Dev Cell 2018; 47:21-37.e5. [PMID: 30220568 DOI: 10.1016/j.devcel.2018.08.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 05/18/2018] [Accepted: 08/13/2018] [Indexed: 12/31/2022]
Abstract
How embryonic progenitors coordinate cell fate specification and establish transcriptional and signaling competence is a fundamental question in developmental biology. Here, we show that transcription factor ΔNp63 profoundly changes the transcriptome and remodels thousands of open chromatin regions of Krt8+ progenitors during epidermal fate specification. ATAC-seq and single-cell RNA-seq reveal that ΔNp63-dependent programs govern epidermal lineage formation, and ΔNp63-independent programs, mediated by AP2 and AP1 transcription factors, promote epidermal differentiation and epithelial-to-mesenchymal transition. ΔNp63 promotes Wnt signaling by directly upregulating Wnt ligands, Frizzled receptors, and transcription factors. Deletion of β-catenin in Krt8+ progenitors delays their maturation into Krt5+ progenitors. The lack of epidermal Wnt production in the absence of ΔNp63 also incapacitates Wnt activation in the underlying dermal cells. These findings reveal the remarkable changes of the transcriptome, open chromatin, and signaling pathways at the onset of skin development and uncover the molecular cascade for epidermal lineage formation.
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Affiliation(s)
- Xiying Fan
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
| | - Dongmei Wang
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
| | - Jeremy Evan Burgmaier
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
| | - Yudong Teng
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
| | - Rose-Anne Romano
- Department of Oral Biology, School of Dental Medicine, SUNY at Buffalo, Buffalo, NY, USA
| | - Satrajit Sinha
- Department of Biochemistry, Jacob School of Medicine and Biomedical Sciences, SUNY at Buffalo, Buffalo, NY, USA
| | - Rui Yi
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA.
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175
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Xu M, Gan T, Ning H, Wang L. MicroRNA Functions in Thymic Biology: Thymic Development and Involution. Front Immunol 2018; 9:2063. [PMID: 30254640 PMCID: PMC6141719 DOI: 10.3389/fimmu.2018.02063] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 08/21/2018] [Indexed: 01/02/2023] Open
Abstract
During the entire processes of thymus organogenesis, maturation, and involution, gene regulation occurs post-transcriptionally via recently discovered microRNA (miRNA) transcripts. Numerous reports indicate that miRNAs may be involved in the construction of a normal thymic microenvironment, which constitutes a critical component to support T lymphocyte development. MiRNAs are also expressed in thymic stromal cells including thymic epithelial cells (TECs) during maturation and senescence. This review focuses on the function of miRNAs in thymic development and involution. A better understanding of these processes will provide new insights into the regulatory network of TECs and further comprehension of how genes control TECs to maintain the thymic microenvironment during thymus development and aging, thus supporting a normal cellular immune system.
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Affiliation(s)
- Minwen Xu
- First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Tao Gan
- Department of Biotechnology, Gannan Medical University, Ganzhou, China
| | - Huiting Ning
- Department of Biotechnology, Gannan Medical University, Ganzhou, China
| | - Liefeng Wang
- Department of Biotechnology, Gannan Medical University, Ganzhou, China
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176
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Identification of chronological and photoageing-associated microRNAs in human skin. Sci Rep 2018; 8:12990. [PMID: 30154427 PMCID: PMC6113407 DOI: 10.1038/s41598-018-31217-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 08/09/2018] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs are short non-coding RNAs that play key roles in regulating biological processes. In this study, we explored effects of chronological and photoageing on the miRNome of human skin. To this end, biopsies were collected from sun-exposed (outer arm, n = 45) and sun-protected (inner arm, n = 45) skin from fair-skinned (phototype II/III) healthy female volunteers of three age groups: young, 18-25 years, middle age, 40-50 years and aged, > 70 years. Strict inclusion criteria were used for photoageing scoring and for chronological ageing. Microarray analysis revealed that chronological ageing had minor effect on the human skin miRNome. In contrast, photoageing had a robust impact on miRNAs, and a set of miRNAs differentially expressed between sun-protected and sun-exposed skin of the young and aged groups was identified. Upregulation of miR-383, miR-145 and miR-34a and downregulation of miR-6879, miR-3648 and miR-663b were confirmed using qRT-PCR in sun-exposed skin compared with sun-protected skin. qRT-PCR analysis revealed that miR-383, miR-34a and miR-134 were differentially expressed in all three age groups both in chronological and photoageing, suggesting a synergetic effect of intrinsic and extrinsic ageing on their expression. In conclusion, our study identifies a unique miRNA signature which may contribute to skin ageing.
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177
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Hassanzadeh H, Matin MM, Naderi-Meshkin H, Bidkhori HR, Mirahmadi M, Raeesolmohaddeseen M, Sanjar-Moussavi N, Bahrami AR. Using paracrine effects of Ad-MSCs on keratinocyte cultivation and fabrication of epidermal sheets for improving clinical applications. Cell Tissue Bank 2018; 19:531-547. [PMID: 30105667 DOI: 10.1007/s10561-018-9702-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 05/14/2018] [Indexed: 12/13/2022]
Abstract
Recent advances in wound healing have made cell therapy a potential approach for the treatment of various types of skin defects such as trauma, burns, scars and diabetic leg ulcers. Cultured keratinocytes have been applied to burn patients since 1981. Patients with acute and chronic wounds can be treated with autologous/allograft cultured keratinocytes. There are various methods for cultivation of epidermal keratinocytes used in cell therapy. One of the important properties of an efficient cell therapy is the preservation of epidermal stem cells. Mesenchymal Stem Cells (MSCs) are major regulatory cells involved in the acceleration of wound healing via induction of cell proliferation, angiogenesis and stimulating the release of paracrine signaling molecules. Considering the beneficial effects of MSCs on wound healing, the main aim of the present study is investigating paracrine effects of Adipose-derived Mesenchymal Stem Cell (Ad-MSCs) on cultivation of keratinocytes with focusing on preservation of stem cells and their differentiation process. We further introduced a new approach for culturing isolated keratinocytes in vitro in order to generate epidermal keratinocyte sheets without using a feeder layer. To do so, Ad-MSC conditioned medium was applied as an alternative to commercial media for keratinocyte cultivation. In this study, the expression of several stem/progenitor cell (P63, K19 and K14) and differentition (K10, IVL and FLG) markers was examined using real time PCR on days 7, 14 and 21 of culture in keratinocytes in Ad-MSC conditioned medium. P63 and α6 integrin expression was also evaluated via flow cytometry. The results were compared with control group including keratinocytes cultured in EpiLife medium and our data indicated that this Ad-MSC conditioned medium is a good alternative for keratinocyte cultivation and producing epidermal sheets for therapeutic and clinical purposes. The reasons are the expression of stem cell and differentiation markers and overcoming the requirement for feeder layer which leads to a xenograft-free transplantation. Besides, this approach has low cost and is easier to perform. However, more in vitro and in vivo experiments as well as safety evaluation required before clinical applications.
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Affiliation(s)
- Halimeh Hassanzadeh
- Stem Cell and Regenerative Medicine Research Group, Iranian Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, Mashhad, Iran.,Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Maryam M Matin
- Stem Cell and Regenerative Medicine Research Group, Iranian Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, Mashhad, Iran. .,Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran. .,Novel Diagnostics and Therapeutics Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran.
| | - Hojjat Naderi-Meshkin
- Stem Cell and Regenerative Medicine Research Group, Iranian Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, Mashhad, Iran
| | - Hamid Reza Bidkhori
- Stem Cell and Regenerative Medicine Research Group, Iranian Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, Mashhad, Iran
| | - Mahdi Mirahmadi
- Stem Cell and Regenerative Medicine Research Group, Iranian Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, Mashhad, Iran
| | - Mahmood Raeesolmohaddeseen
- Stem Cell and Regenerative Medicine Research Group, Iranian Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, Mashhad, Iran
| | | | - Ahmad Reza Bahrami
- Stem Cell and Regenerative Medicine Research Group, Iranian Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, Mashhad, Iran. .,Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran. .,Novel Diagnostics and Therapeutics Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran.
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178
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Spatially correlated phenotyping reveals K5-positive luminal progenitor cells and p63-K5/14-positive stem cell-like cells in human breast epithelium. J Transl Med 2018; 98:1065-1075. [PMID: 29743728 DOI: 10.1038/s41374-018-0054-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 01/19/2018] [Accepted: 02/18/2018] [Indexed: 01/15/2023] Open
Abstract
Understanding the mechanisms regulating human mammary epithelium requires knowledge of the cellular constituents of this tissue. Different and partially contradictory definitions and concepts describing the cellular hierarchy of mammary epithelium have been proposed, including our studies of keratins K5 and/or K14 as markers of progenitor cells. Furthermore, we and others have suggested that the p53 homolog p63 is a marker of human breast epithelial stem cells. In this investigation, we expand our previous studies by testing whether immunohistochemical staining with monospecific anti-keratin antibodies in combination with an antibody against the stem cell marker p63 might help refine the different morphologic phenotypes in normal breast epithelium. We used in situ multilabel staining for p63, different keratins, the myoepithelial marker smooth muscle actin (SMA), the estrogen receptor (ER), and Ki67 to dissect and quantify the cellular components of 16 normal pre- and postmenopausal human breast epithelial tissue samples at the single-cell level. Importantly, we confirm the existence of K5+ only cells and suggest that they, in contrast to the current view, are key luminal precursor cells from which K8/18+ progeny cells evolve. These cells are further modified by the expression of ER and Ki67. We have also identified a population of p63+K5+ cells that are only found in nipple ducts. Based on our findings, we propose a new concept of the cellular hierarchy of human breast epithelium, including K5 luminal lineage progenitors throughout the ductal-lobular axis and p63+K5+ progenitors confined to the nipple ducts.
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179
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Abstract
The incidence of esophageal adenocarcinoma (EAC) and its precursor lesion Barrett's esophagus (BE) has been increasing steadily in the western world in recent decades. Understanding the cellular origins of BE and the conditions responsible for their malignant transformation would greatly facilitate risk assessment and identification of patients at risk of progression, but this topic remains a source of debate. Here, we review recent findings that have provided support for the gastroesophageal junction (GEJ) as the main source of stem cells that give rise to BE and EAC. These include both gastric cardia cells and transitional basal cells. Furthermore, we discuss the role of chronic injury and inflammation in a tumor microenvironment as a major factor in promoting stem cell expansion and proliferation as well as transformation of the GEJ-derived stem cells and progression to EAC. We conclude that there exists a large amount of empirical support for the GEJ as the likely source of BE stem cells. While BE seems to resemble a successful adaptation to esophageal damage, carcinogenesis appears as a consequence of natural selection at the level of GEJ stem cells, and later glands, that expand into the esophagus wherein the local ecology creates the selective landscape for cancer progression.
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180
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Wang GX, Tu HC, Dong Y, Skanderup AJ, Wang Y, Takeda S, Ganesan YT, Han S, Liu H, Hsieh JJ, Cheng EH. ΔNp63 Inhibits Oxidative Stress-Induced Cell Death, Including Ferroptosis, and Cooperates with the BCL-2 Family to Promote Clonogenic Survival. Cell Rep 2018; 21:2926-2939. [PMID: 29212036 DOI: 10.1016/j.celrep.2017.11.030] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 08/08/2017] [Accepted: 11/08/2017] [Indexed: 12/31/2022] Open
Abstract
The BCL-2 family proteins are central regulators of apoptosis. However, cells deficient for BAX and BAK or overexpressing BCL-2 still succumb to oxidative stress upon DNA damage or matrix detachment. Here, we show that ΔNp63α overexpression protects cells from oxidative stress induced by oxidants, DNA damage, anoikis, or ferroptosis-inducing agents. Conversely, ΔNp63α deficiency increases oxidative stress. Mechanistically, ΔNp63α orchestrates redox homeostasis through transcriptional control of glutathione biogenesis, utilization, and regeneration. Analysis of a lung squamous cell carcinoma dataset from The Cancer Genome Atlas (TCGA) reveals that TP63 amplification/overexpression upregulates the glutathione metabolism pathway in primary human tumors. Strikingly, overexpression of ΔNp63α promotes clonogenic survival of p53-/-Bax-/-Bak-/- cells against DNA damage. Furthermore, co-expression of BCL-2 and ΔNp63α confers clonogenic survival against matrix detachment, disrupts the luminal clearance of mammary acini, and promotes cancer metastasis. Our findings highlight the need for a simultaneous blockade of apoptosis and oxidative stress to promote long-term cellular well-being.
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Affiliation(s)
- Gary X Wang
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Division of Biology & Biomedical Sciences, Washington University, St. Louis, MO 63110, USA
| | - Ho-Chou Tu
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Yiyu Dong
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Anders Jacobsen Skanderup
- Genome Institute of Singapore, National University of Singapore, 60 Biopolis St., 138672 Singapore, Singapore
| | - Yufeng Wang
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Shugaku Takeda
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Yogesh Tengarai Ganesan
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Song Han
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Han Liu
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - James J Hsieh
- Molecular Oncology, Department of Medicine, Siteman Cancer Center, Washington University, St. Louis, MO 63110, USA
| | - Emily H Cheng
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, Cornell University, New York, NY 10065, USA.
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181
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Zhao B, Chen Y, Mu L, Hu S, Wu X. Identification and profiling of microRNA between back and belly Skin in Rex rabbits (Oryctolagus cuniculus). WORLD RABBIT SCIENCE 2018. [DOI: 10.4995/wrs.2018.7058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Skin is an important trait for Rex rabbits and skin development is influenced by many processes, including hair follicle cycling, keratinocyte differentiation and formation of coat colour and skin morphogenesis. We identified differentially expressed microRNAs (miRNAs) between the back and belly skin in Rex rabbits. In total, 211 miRNAs (90 upregulated miRNAs and 121 downregulated miRNAs) were identified with a |log<sub>2</sub> (fold change)|>1 and <em>P</em>-value<0.05. Using target gene prediction for the miRNAs, differentially expressed predicted target genes were identified and the functional enrichment and signalling pathways of these target genes were processed to reveal their biological functions. A number of differentially expressed miRNAs were found to be involved in regulation of the cell cycle, skin epithelium differentiation, keratinocyte proliferation, hair follicle development and melanogenesis. In addition, target genes regulated by miRNAs play key roles in the activities of the Hedgehog signalling pathway, Wnt signalling pathway, Osteoclast differentiation and MAPK pathway, revealing mechanisms of skin development. Nine candidate miRNAs and 5 predicted target genes were selected for verification of their expression by quantitative reverse transcription polymerase chain reaction. A regulation network of miRNA and their target genes was constructed by analysing the GO enrichment and signalling pathways. Further studies should be carried out to validate the regulatory relationships between candidate miRNAs and their target genes.
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182
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Casale C, Imparato G, Urciuolo F, Rescigno F, Scamardella S, Escolino M, Netti PA. Engineering a human skin equivalent to study dermis remodelling and epidermis senescence in vitro after UVA exposure. J Tissue Eng Regen Med 2018; 12:1658-1669. [DOI: 10.1002/term.2693] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 04/17/2018] [Accepted: 05/03/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Costantino Casale
- Interdisciplinary Research Centre on Biomaterials (CRIB); University of Naples Federico II P.le Tecchio 80; Naples Italy
| | - Giorgia Imparato
- Center for Advanced Biomaterials for HealthCare@CRIB; Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53; Naples Italy
| | - Francesco Urciuolo
- Department of Chemical, Materials and Industrial Production Engineering (DICMAPI); University of Naples Federico II; Naples Italy
| | - Francesca Rescigno
- Center for Advanced Biomaterials for HealthCare@CRIB; Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53; Naples Italy
- Department of Chemical, Materials and Industrial Production Engineering (DICMAPI) and Interdisciplinary Research Centre on Biomaterials (CRIB); University of Naples Federico II; Naples Italy
| | - Sara Scamardella
- Center for Advanced Biomaterials for HealthCare@CRIB; Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53; Naples Italy
- Department of Chemical, Materials and Industrial Production Engineering (DICMAPI) and Interdisciplinary Research Centre on Biomaterials (CRIB); University of Naples Federico II; Naples Italy
| | - Maria Escolino
- Department of Translational Medical Sciences, Pediatric Surgery Unit; University of Naples Federico II; Naples Italy
| | - Paolo A. Netti
- Center for Advanced Biomaterials for HealthCare@CRIB; Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53; Naples Italy
- Department of Chemical, Materials and Industrial Production Engineering (DICMAPI) and Interdisciplinary Research Centre on Biomaterials (CRIB); University of Naples Federico II; Naples Italy
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183
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Xian W, McKeon F. Demise of lung transplants: exposing critical gaps in understanding lung stem cells. J Thorac Dis 2018; 10:S1016-S1019. [PMID: 29849224 DOI: 10.21037/jtd.2018.03.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wa Xian
- Institute of Molecular Medicine, McGovern Medical School, University of Texas Health, Sciences Center, Department of Biology and Biochemistry, Stem Cell Center, University of Houston, Houston, TX, USA
| | - Frank McKeon
- Institute of Molecular Medicine, McGovern Medical School, University of Texas Health, Sciences Center, Department of Biology and Biochemistry, Stem Cell Center, University of Houston, Houston, TX, USA
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184
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Yang Y, Riccio P, Schotsaert M, Mori M, Lu J, Lee DK, García-Sastre A, Xu J, Cardoso WV. Spatial-Temporal Lineage Restrictions of Embryonic p63 + Progenitors Establish Distinct Stem Cell Pools in Adult Airways. Dev Cell 2018; 44:752-761.e4. [PMID: 29587145 DOI: 10.1016/j.devcel.2018.03.001] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 02/15/2018] [Accepted: 02/28/2018] [Indexed: 11/29/2022]
Abstract
Basal cells (BCs) are p63-expressing multipotent progenitors of skin, tracheoesophageal and urinary tracts. p63 is abundant in developing airways; however, it remains largely unclear how embryonic p63+ cells contribute to the developing and postnatal respiratory tract epithelium, and ultimately how they relate to adult BCs. Using lineage-tracing and functional approaches in vivo, we show that p63+ cells arising from the lung primordium are initially multipotent progenitors of airway and alveolar lineages but later become restricted proximally to generate the tracheal adult stem cell pool. In intrapulmonary airways, these cells are maintained immature to adulthood in bronchi, establishing a rare p63+Krt5- progenitor cell population that responds to H1N1 virus-induced severe injury. Intriguingly, this pool includes a CC10 lineage-labeled p63+Krt5- cell subpopulation required for a full H1N1-response. These data elucidate key aspects in the establishment of regionally distinct adult stem cell pools in the respiratory system, potentially with relevance to other organs.
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Affiliation(s)
- Ying Yang
- Columbia Center for Human Development, Department of Medicine, Pulmonary Allergy Critical Care, Columbia University Medical Center, New York, NY 10032, USA; Department of Genetics and Development, Columbia University Medical Center, New York, NY 10032, USA
| | - Paul Riccio
- Columbia Center for Human Development, Department of Medicine, Pulmonary Allergy Critical Care, Columbia University Medical Center, New York, NY 10032, USA
| | - Michael Schotsaert
- Departments of Microbiology and Medicine, Division of Infectious Diseases, and Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Munemasa Mori
- Columbia Center for Human Development, Department of Medicine, Pulmonary Allergy Critical Care, Columbia University Medical Center, New York, NY 10032, USA
| | - Jining Lu
- Columbia Center for Human Development, Department of Medicine, Pulmonary Allergy Critical Care, Columbia University Medical Center, New York, NY 10032, USA
| | - Dong-Kee Lee
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Adolfo García-Sastre
- Departments of Microbiology and Medicine, Division of Infectious Diseases, and Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Jianming Xu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Wellington V Cardoso
- Columbia Center for Human Development, Department of Medicine, Pulmonary Allergy Critical Care, Columbia University Medical Center, New York, NY 10032, USA; Department of Genetics and Development, Columbia University Medical Center, New York, NY 10032, USA.
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185
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STXBP4 regulates APC/C-mediated p63 turnover and drives squamous cell carcinogenesis. Proc Natl Acad Sci U S A 2018; 115:E4806-E4814. [PMID: 29735662 DOI: 10.1073/pnas.1718546115] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Levels of the N-terminally truncated isoform of p63 (ΔN p63), well documented to play a pivotal role in basal epidermal gene expression and epithelial maintenance, need to be strictly regulated. We demonstrate here that the anaphase-promoting complex/cyclosome (APC/C) complex plays an essential role in the ubiquitin-mediated turnover of ΔNp63α through the M-G1 phase. In addition, syntaxin-binding protein 4 (Stxbp4), which we previously discovered to bind to ΔNp63, can suppress the APC/C-mediated proteolysis of ΔNp63. Supporting the physiological relevance, of these interactions, both Stxbp4 and an APC/C-resistant version of ΔNp63α (RL7-ΔNp63α) inhibit the terminal differentiation process in 3D organotypic cultures. In line with this, both the stable RL7-ΔNp63α variant and Stxbp4 have oncogenic activity in soft agar and xenograft tumor assays. Notably as well, higher levels of Stxbp4 expression are correlated with the accumulation of ΔNp63 in human squamous cell carcinoma (SCC). Our study reveals that Stxbp4 drives the oncogenic potential of ΔNp63α and may provide a relevant therapeutic target for SCC.
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186
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Vikhreva P, Melino G, Amelio I. p73 Alternative Splicing: Exploring a Biological Role for the C-Terminal Isoforms. J Mol Biol 2018; 430:1829-1838. [PMID: 29733853 PMCID: PMC5995411 DOI: 10.1016/j.jmb.2018.04.034] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 04/24/2018] [Accepted: 04/27/2018] [Indexed: 02/02/2023]
Abstract
p73 (encoded by TP73 gene) is a p53 related protein that functions as a transcriptional factor. Similarly to p53, following DNA damage, p73 is stabilized and activated and controls expression of target genes that are involved in the regulation of cycle arrest and apoptosis. However, great complexity to the function of this gene is given by the wide range of its non-tumor-related roles, which include neurological development, ciliogenesis and fertility. From the structural point of view, p73 displays an intricate range of regulations because it can be expressed both as an N-terminally deleted dominant-negative isoforms and as multiple alternatively spliced C-terminal isoforms, which can include or not a sterile alpha motif domain. More is known about the functions of the N-terminal isoforms of p73 (TAp73 and ΔNp73) and their opposing pro- and anti-apoptotic roles, whereas the functional differences of the distinct C-terminal splice forms of p73 are very far away from been defined. Here we summarize the current available literature regarding p73 C-terminal isoforms and the contribution of the sterile alpha motif domain to p73 function, trying to provide an unified view in this complex and sometime controversial field. Current data indicate that the full-length, TAp73α, is the major, if not the exclusive, isoform detected in physiological systems, indicating that detailed spatio-temporal expression analysis and functional studies are highly demanded to support a physiological role for the p73 alternative splicing. With this article, we also aim to emphasize the need to further investigation on the topic, refocusing the attention on what we believe are the most relevant unanswered questions.
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Affiliation(s)
- Polina Vikhreva
- MRC Toxicology Unit, University of Cambridge, United Kingdom
| | - Gerry Melino
- MRC Toxicology Unit, University of Cambridge, United Kingdom; Department of Experimental Medicine and Surgery, IDI-IRCCS, University of Rome Tor Vergata, Italy
| | - Ivano Amelio
- MRC Toxicology Unit, University of Cambridge, United Kingdom.
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187
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Emmerson E, Knox SM. Salivary gland stem cells: A review of development, regeneration and cancer. Genesis 2018; 56:e23211. [PMID: 29663717 PMCID: PMC5980780 DOI: 10.1002/dvg.23211] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 04/11/2018] [Accepted: 04/12/2018] [Indexed: 12/13/2022]
Abstract
Salivary glands are responsible for maintaining the health of the oral cavity and are routinely damaged by therapeutic radiation for head and neck cancer as well as by autoimmune diseases such as Sjögren's syndrome. Regenerative approaches based on the reactivation of endogenous stem cells or the transplant of exogenous stem cells hold substantial promise in restoring the structure and function of these organs to improve patient quality of life. However, these approaches have been hampered by a lack of knowledge on the identity of salivary stem cell populations and their regulators. In this review we discuss our current knowledge on salivary stem cells and their regulators during organ development, homeostasis and regeneration. As increasing evidence in other systems suggests that progenitor cells may be a source of cancer, we also review whether these same salivary stem cells may also be cancer initiating cells.
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Affiliation(s)
- Elaine Emmerson
- The MRC Centre for Regenerative Medicine, The University of Edinburgh, 5 Little France Drive, Edinburgh, EH16 4UU, UK
| | - Sarah M. Knox
- Program in Craniofacial Biology, Department of Cell and Tissue Biology, University of California, 513 Parnassus Avenue, San Francisco, CA, 94143, USA
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188
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Hopf NB, Spring P, Hirt-Burri N, Jimenez S, Sutter B, Vernez D, Berthet A. Polycyclic aromatic hydrocarbons (PAHs) skin permeation rates change with simultaneous exposures to solar ultraviolet radiation (UV-S). Toxicol Lett 2018; 287:122-130. [DOI: 10.1016/j.toxlet.2018.01.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 01/26/2018] [Accepted: 01/30/2018] [Indexed: 12/28/2022]
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189
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Mishra A, Sriram H, Chandarana P, Tanavde V, Kumar RV, Gopinath A, Govindarajan R, Ramaswamy S, Sadasivam S. Decreased expression of cell adhesion genes in cancer stem-like cells isolated from primary oral squamous cell carcinomas. Tumour Biol 2018; 40:1010428318780859. [PMID: 29888653 DOI: 10.1177/1010428318780859] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The goal of this study was to isolate cancer stem-like cells marked by high expression of CD44, a putative cancer stem cell marker, from primary oral squamous cell carcinomas and identify distinctive gene expression patterns in these cells. From 1 October 2013 to 4 September 2015, 76 stage III-IV primary oral squamous cell carcinoma of the gingivobuccal sulcus were resected. In all, 13 tumours were analysed by immunohistochemistry to visualise CD44-expressing cells. Expression of CD44 within The Cancer Genome Atlas-Head and Neck Squamous Cell Carcinoma RNA-sequencing data was also assessed. Seventy resected tumours were dissociated into single cells and stained with antibodies to CD44 as well as CD45 and CD31 (together referred as Lineage/Lin). From 45 of these, CD44+Lin- and CD44-Lin- subpopulations were successfully isolated using fluorescence-activated cell sorting, and good-quality RNA was obtained from 14 such sorted pairs. Libraries from five pairs were sequenced and the results analysed using bioinformatics tools. Reverse transcription quantitative polymerase chain reaction was performed to experimentally validate the differential expression of selected candidate genes identified from the transcriptome sequencing in the same 5 and an additional 9 tumours. CD44 was expressed on the surface of poorly differentiated tumour cells, and within the The Cancer Genome Atlas-Head and Neck Squamous Cell Carcinoma samples, its messenger RNA levels were higher in tumours compared to normal. Transcriptomics revealed that 102 genes were upregulated and 85 genes were downregulated in CD44+Lin- compared to CD44-Lin- cells in at least 3 of the 5 tumours sequenced. The upregulated genes included those involved in immune regulation, while the downregulated genes were enriched for genes involved in cell adhesion. Decreased expression of PCDH18, MGP, SPARCL1 and KRTDAP was confirmed by reverse transcription quantitative polymerase chain reaction. Lower expression of the cell-cell adhesion molecule PCDH18 correlated with poorer overall survival in the The Cancer Genome Atlas-Head and Neck Squamous Cell Carcinoma data highlighting it as a potential negative prognostic factor in this cancer.
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Affiliation(s)
- Amrendra Mishra
- 1 Institute for Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences, UAS-GKVK Campus, Bengaluru, India
- 2 Hannover Biomedical Research School, Hannover Medical School, Hannover, Germany
| | - Harshini Sriram
- 1 Institute for Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences, UAS-GKVK Campus, Bengaluru, India
| | | | - Vivek Tanavde
- 3 iBioAnalysis Pvt. Ltd., Ahmedabad, India
- 4 Division of Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
- 5 Bioinformatics Institute, Agency for Science Technology and Research (A*STAR), Singapore
| | - Rekha V Kumar
- 6 Kidwai Memorial Institute of Oncology, Bengaluru, India
| | | | | | - S Ramaswamy
- 1 Institute for Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences, UAS-GKVK Campus, Bengaluru, India
| | - Subhashini Sadasivam
- 1 Institute for Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences, UAS-GKVK Campus, Bengaluru, India
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190
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Regeneration of cervical reserve cell-like cells from human induced pluripotent stem cells (iPSCs): A new approach to finding targets for cervical cancer stem cell treatment. Oncotarget 2018; 8:40935-40945. [PMID: 28402962 PMCID: PMC5522215 DOI: 10.18632/oncotarget.16783] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 02/27/2017] [Indexed: 12/27/2022] Open
Abstract
Cervical reserve cells are epithelial progenitor cells that are pathologically evident as the origin of cervical cancer. Thus, investigating the characteristics of cervical reserve cells could yield insight into the features of cervical cancer stem cells (CSCs). In this study, we established a method for the regeneration of cervical reserve cell-like properties from human induced pluripotent stem cells (iPSCs) and named these cells induced reserve cell-like cells (iRCs). Approximately 70% of iRCs were positive for the reserve cell markers p63, CK5 and CK8. iRCs also expressed the SC junction markers CK7, AGR2, CD63, MMP7 and GDA. While iRCs expressed neither ERα nor ERβ, they expressed CA125. These data indicated that iRCs possessed characteristics of cervical epithelial progenitor cells. iRCs secreted higher levels of several inflammatory cytokines such as macrophage migration inhibitory factor (MIF), soluble intercellular adhesion molecule 1 (sICAM-1) and C-X-C motif ligand 10 (CXCL-10) compared with normal cervical epithelial cells. iRCs also expressed human leukocyte antigen-G (HLA-G), which is an important cell-surface antigen for immune tolerance and carcinogenesis. Together with the fact that cervical CSCs can originate from reserve cells, our data suggested that iRCs were potent immune modulators that might favor cervical cancer cell survival. In conclusion, by generating reserve cell-like properties from iPSCs, we provide a new approach that may yield new insight into cervical cancer stem cells and help find new oncogenic targets.
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191
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Duteil D, Tourrette Y, Eberlin A, Willmann D, Patel D, Friedrichs N, Müller JM, Schüle R. The histone acetyltransferase inhibitor Nir regulates epidermis development. Development 2018; 145:dev.158543. [PMID: 29490983 DOI: 10.1242/dev.158543] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 02/11/2018] [Indexed: 11/20/2022]
Abstract
In addition to its function as an inhibitor of histone acetyltransferases, Nir (Noc2l) binds to p53 and TAp63 to regulate their activity. Here, we show that epidermis-specific ablation of Nir impairs epidermal stratification and barrier function, resulting in perinatal lethality. Nir-deficient epidermis lacks appendages and remains single layered during embryogenesis. Cell proliferation is inhibited, whereas apoptosis and p53 acetylation are increased, indicating that Nir is controlling cell proliferation by limiting p53 acetylation. Transcriptome analysis revealed that Nir regulates the expression of essential factors in epidermis development, such as keratins, integrins and laminins. Furthermore, Nir binds to and controls the expression of p63 and limits H3K18ac at the p63 promoter. Corroborating the stratification defects, asymmetric cell divisions were virtually absent in Nir-deficient mice, suggesting that Nir is required for correct mitotic spindle orientation. In summary, our data define Nir as a key regulator of skin development.
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Affiliation(s)
- Delphine Duteil
- Urologische Klinik und Zentrale Klinische Forschung, Klinikum der Universität Freiburg, Breisacherstrasse 66, 79106 Freiburg, Germany
| | - Yves Tourrette
- Urologische Klinik und Zentrale Klinische Forschung, Klinikum der Universität Freiburg, Breisacherstrasse 66, 79106 Freiburg, Germany
| | - Adrien Eberlin
- Urologische Klinik und Zentrale Klinische Forschung, Klinikum der Universität Freiburg, Breisacherstrasse 66, 79106 Freiburg, Germany
| | - Dominica Willmann
- Urologische Klinik und Zentrale Klinische Forschung, Klinikum der Universität Freiburg, Breisacherstrasse 66, 79106 Freiburg, Germany
| | - Dharmeshkumar Patel
- Pediatric Blood and Marrow Transplant, University of Minnesota, 2-191 Moos Tower, 515 Delaware St. SE, Minneapolis, MN 55455, USA
| | - Nicolaus Friedrichs
- Institute of Pathology, University of Cologne Medical School, 50937 Cologne, Germany
| | - Judith M Müller
- Urologische Klinik und Zentrale Klinische Forschung, Klinikum der Universität Freiburg, Breisacherstrasse 66, 79106 Freiburg, Germany
| | - Roland Schüle
- Urologische Klinik und Zentrale Klinische Forschung, Klinikum der Universität Freiburg, Breisacherstrasse 66, 79106 Freiburg, Germany .,BIOSS Centre of Biological Signalling Studies, Albert-Ludwigs-University, 79106 Freiburg, Germany.,Deutsche Konsortium für Translationale Krebsforschung (DKTK), Standort, 79106 Freiburg, Germany
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192
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Yamamoto-Fukuda T, Akiyama N, Takahashi M, Kojima H. Keratinocyte Growth Factor (KGF) Modulates Epidermal Progenitor Cell Kinetics through Activation of p63 in Middle Ear Cholesteatoma. J Assoc Res Otolaryngol 2018; 19:223-241. [PMID: 29549594 DOI: 10.1007/s10162-018-0662-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 02/28/2018] [Indexed: 01/27/2023] Open
Abstract
The basal stem/progenitor cell maintains homeostasis of the epidermis. Progressive disturbance of this homeostasis has been implicated as a possible cause in the pathogenesis of epithelial disease, such as middle ear cholesteatoma. In many cases of stem/progenitor cell regulation, the importance of extracellular signals provided by the surrounding cells is well-recognized. Keratinocyte growth factor (KGF) is a mesenchymal-cell-derived paracrine growth factor that specifically participates in skin homeostasis; however, the overexpression of KGF induces middle ear cholesteatoma. In this study, two kinds of thymidine analogs were transferred at different time points and we investigated the effects of overexpressed KGF on the cell kinetics of stem/progenitor cells in vivo. As a result, BrdU(+)EdU(+) cells (stem/progenitor cells) were detected in the thickened epithelium of KGF-transfected specimens. The use of a high-resolution microscope enabled us to analyze the phosphorylated level of p63 in individual nuclei, and the results clearly demonstrated that BrdU(+)EdU(+) cells are regarded as progenitor cells. In the overexpression of KGF, the stimulation of progenitor cell proliferation was inhibited by SU5402, an inhibitor for tyrosine kinase of KGFR. These findings indicate that KGF overexpression may increase stem/progenitor cell proliferation and block terminal differentiation, resulting in epithelial hyperplasia, which is typical in middle ear cholesteatoma.
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Affiliation(s)
- Tomomi Yamamoto-Fukuda
- Department of Otorhinolaryngology, Jikei University School of Medicine, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan. .,Department of Histology and Cell Biology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
| | - Naotaro Akiyama
- Department of Histology and Cell Biology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Department of Otorhinolaryngology, Toho University School of Medicine, Tokyo, Japan
| | - Masahiro Takahashi
- Department of Otorhinolaryngology, Jikei University School of Medicine, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Hiromi Kojima
- Department of Otorhinolaryngology, Jikei University School of Medicine, 3-25-8, Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
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193
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Thompson CA, DeLaForest A, Battle MA. Patterning the gastrointestinal epithelium to confer regional-specific functions. Dev Biol 2018; 435:97-108. [PMID: 29339095 PMCID: PMC6615902 DOI: 10.1016/j.ydbio.2018.01.006] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 01/01/2018] [Accepted: 01/10/2018] [Indexed: 12/12/2022]
Abstract
The gastrointestinal (GI) tract, in simplest terms, can be described as an epithelial-lined muscular tube extending along the cephalocaudal axis from the oral cavity to the anus. Although the general architecture of the GI tract organs is conserved from end to end, the presence of different epithelial tissue structures and unique epithelial cell types within each organ enables each to perform the distinct digestive functions required for efficient nutrient assimilation. Spatiotemporal regulation of signaling pathways and downstream transcription factors controls GI epithelial morphogenesis during development to confer essential regional-specific epithelial structures and functions. Here, we discuss the fundamental functions of each GI tract organ and summarize the diversity of epithelial structures present along the cephalocaudal axis of the GI tract. Next, we discuss findings, primarily from genetic mouse models, that have defined the roles of key transcription factors during epithelial morphogenesis, including p63, SOX2, SOX15, GATA4, GATA6, HNF4A, and HNF4G. Additionally, we examine how the Hedgehog, WNT, and BMP signaling pathways contribute to defining unique epithelial features along the cephalocaudal axis of the GI tract. Lastly, we examine the molecular mechanisms controlling regionalized cytodifferentiation of organ-specific epithelial cell types within the GI tract, concentrating on the stomach and small intestine. The delineation of GI epithelial patterning mechanisms in mice has provided fundamental knowledge to guide the development and refinement of three-dimensional GI organotypic culture models such as those derived from directed differentiation of human pluripotent stem cells and those derived directly from human tissue samples. Continued examination of these pathways will undoubtedly provide vital insights into the mechanisms of GI development and disease and may afford new avenues for innovative tissue engineering and personalized medicine approaches to treating GI diseases.
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Affiliation(s)
- Cayla A Thompson
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
| | - Ann DeLaForest
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
| | - Michele A Battle
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA.
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194
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Soliman AM, Das S, Abd Ghafar N, Teoh SL. Role of MicroRNA in Proliferation Phase of Wound Healing. Front Genet 2018; 9:38. [PMID: 29491883 PMCID: PMC5817091 DOI: 10.3389/fgene.2018.00038] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 01/29/2018] [Indexed: 12/15/2022] Open
Abstract
Wound healing is a complex biological process that is generally composed of four phases: hemostasis, inflammation, proliferation, and remodeling. The proliferation phase is crucial for effective healing compared to other phases. Many critical events occur during this phase, i.e., migration of fibroblasts, re-epithelialization, angiogenesis and wound contraction. Chronic wounds are common and are considered a major public health problem. Therefore, there is the increasing need to discover new therapeutic strategies. MicroRNA (miRNA) research in the field of wound healing is in its early phase, but the knowledge of the recent discoveries is essential for developing effective therapies for the treatment of chronic wounds. In this review, we focused on recently discovered miRNAs which are involved in the proliferation phase of wound healing in the past few years and their role in wound healing.
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Affiliation(s)
| | | | | | - Seong Lin Teoh
- Department of Anatomy, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia
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195
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Wang MJ, Xu YY, Huang RY, Chen XM, Chen HM, Han L, Yan YH, Lu CJ. Role of an imbalanced miRNAs axis in pathogenesis of psoriasis: novel perspectives based on review of the literature. Oncotarget 2018; 8:5498-5507. [PMID: 27729619 PMCID: PMC5354926 DOI: 10.18632/oncotarget.12534] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 10/03/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Specific profile of microRNAs (miRNAs, miR) expressed in psoriasis has been identified in the past few years, while the studies on roles and molecular mechanisms of these miRNAs are still on the way. In our previous study, four specific miRNAs (miR-31, miR-203, hsa-miR-99a and miR-125b) were found to be specifically altered in psoriatic lesions.We therefore conducted a systematic literature review in this study to reveal the role of these miRNAs in the pathogenesis of psoriasis in order to inform future research. METHODS The related articles indexed in PubMed (MEDLINE) database were searched and analyzed. We identified eligible studies related to the mechanism research of miR-31, miR-203, hsa-miR-99a and miR-125b in psoriasis or psoriatic lesional skin from inception up to July 2016. The experts in the field of miRNAs and Psoriasis were involved in analysis process. RESULT Both miR-31 and miR-203 are dramatically upregulated in psoriatic lesions. The former plays the pro-proliferative, pro-differentiative and pro-inflammatory roles and the latter holds the potentials for anti-proliferation, pro-inflammation and pro-differentiation in psoriatic keratinocytes. Conversely, both hsa-miR-99a and miR-125b are significantly downregulated in psoriatic skin. These two miRNAs are able to inhibit proliferation while promote differentiation of psoriatic keratinocytes, and miR-125b can also suppress inflammation in psoriatic lesions. By analyzing the contexts related to these miRNAs, we found that each of them does not act alone but rather work in concert with other miRNAs. The imbalance between miR-31/miR-203and hsa-miR-99a/miR-125b may contribute to the intense proliferation and abnormal differentiation of psoriatic keratinocytes, which is a characteristic of pathogenesis of psoriasis. CONCLUSION An imbalanced miRNAs axis was for the first time outlined. Apparently, upregulation of miR-31/miR-203 and downregulation of hsa-miR-99a/miR-125b work together in concert to facilitate the development of psoriasis pathogenesis. Further work in this field holds the potentials to open a new way to study psoriasis.
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Affiliation(s)
- Mao-Jie Wang
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China
| | - Yong-Yue Xu
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China
| | - Run-Yue Huang
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China.,Section of Metabolic Diseases Research, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands.,Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, China
| | - Xiu-Min Chen
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China
| | - Hai-Ming Chen
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China
| | - Ling Han
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China
| | - Yu-Hong Yan
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China
| | - Chuan-Jian Lu
- The Second Affiliated Hospital, Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China.,Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, China
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196
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Borgogna C, Olivero C, Lanfredini S, Calati F, De Andrea M, Zavattaro E, Savoia P, Trisolini E, Boldorini R, Patel GK, Gariglio M. β-HPV Infection Correlates with Early Stages of Carcinogenesis in Skin Tumors and Patient-Derived Xenografts from a Kidney Transplant Recipient Cohort. Front Microbiol 2018; 9:117. [PMID: 29459852 PMCID: PMC5807414 DOI: 10.3389/fmicb.2018.00117] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 01/18/2018] [Indexed: 11/15/2022] Open
Abstract
Many malignancies that occur in high excess in kidney transplant recipients (KTRs) are due to viruses that thrive in the setting of immunosuppression. Keratinocyte carcinoma (KC), the most frequently occurring cancer type in KTR, has been associated with skin infection by human papillomavirus (HPV) from the beta genus. In this report, we extend our previous investigation aimed at identifying the presence of active β-HPV infection in skin tumors from KTRs through detection of viral protein expression. Using a combination of antibodies raised against the E4 and L1 proteins of the β-genotypes, we were able to visualize infection in five tumors [one keratoacanthoma (KA), three actinic keratoses (AKs), and one seborrheic keratoses (SKs)] that were all removed from two patients who had been both transplanted twice, had developed multiple KCs, and presented with a long history of immunosuppression (>30 years). These infected tissues displayed intraepidermal hyperplasia and increased expression of the ΔNp63 protein, which extended into the upper epithelial layers. In addition, using a xenograft model system in nude mice displaying a humanized stromal bed in the site of grafting, we successfully engrafted three AKs, two of which were derived from the aforementioned KTRs and displayed β-HPV infection in the original tumor. Of note, one AK-derived xenograft, along with its ensuing lymph node metastasis, was diagnosed as squamous cell carcinoma (SCC). In the latter, both β-HPV infection and ΔNp63 expression were no longer detectable. Although the overall success rate of engrafting was very low, the results of this study show for the first time that β-HPV+ and ΔNp63+ intraepidermal hyperplasia can indeed progress to an aggressive SCC able to metastasize. Consistent with a series of reports attributing a causative role of β-HPV at early stages of skin carcinogenesis through ΔNp63 induction and increased keratinocytes stemness, here we provide in vivo evidence that these events are also occurring in the affected skin of KTRs. Due to these β-HPV-driven molecular pathways, the nascent tumor cell is able to acquire a high enough number of carcinogenic insults that its proliferation and survival will eventually become independent of viral gene expression.
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Affiliation(s)
- Cinzia Borgogna
- Virology Unit, Department of Translational Medicine, Novara Medical School, University of Eastern Piedmont, Novara, Italy
| | - Carlotta Olivero
- Virology Unit, Department of Translational Medicine, Novara Medical School, University of Eastern Piedmont, Novara, Italy.,School of Biosciences, European Cancer Stem Cell Research Institute, Cardiff University, Cardiff, United Kingdom
| | - Simone Lanfredini
- School of Biosciences, European Cancer Stem Cell Research Institute, Cardiff University, Cardiff, United Kingdom
| | - Federica Calati
- Virology Unit, Department of Translational Medicine, Novara Medical School, University of Eastern Piedmont, Novara, Italy
| | - Marco De Andrea
- Virology Unit, Department of Translational Medicine, Novara Medical School, University of Eastern Piedmont, Novara, Italy.,Virology Unit, Department of Public Health and Pediatric Sciences, Turin Medical School, University of Turin, Turin, Italy
| | - Elisa Zavattaro
- Dermatology Unit, Department of Health Sciences, Novara Medical School, Novara, Italy
| | - Paola Savoia
- Dermatology Unit, Department of Health Sciences, Novara Medical School, Novara, Italy
| | - Elena Trisolini
- Pathology Unit, Department of Health Sciences, Novara Medical School, Novara, Italy
| | - Renzo Boldorini
- Pathology Unit, Department of Health Sciences, Novara Medical School, Novara, Italy
| | - Girish K Patel
- School of Biosciences, European Cancer Stem Cell Research Institute, Cardiff University, Cardiff, United Kingdom
| | - Marisa Gariglio
- Virology Unit, Department of Translational Medicine, Novara Medical School, University of Eastern Piedmont, Novara, Italy
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197
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Koh AS, Miller EL, Buenrostro JD, Moskowitz DM, Wang J, Greenleaf WJ, Chang HY, Crabtree GR. Rapid chromatin repression by Aire provides precise control of immune tolerance. Nat Immunol 2018; 19:162-172. [PMID: 29335648 PMCID: PMC6049828 DOI: 10.1038/s41590-017-0032-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 12/07/2017] [Indexed: 01/23/2023]
Abstract
Aire mediates the expression of tissue-specific antigens in thymic epithelial cells to promote tolerance against self-reactive T lymphocytes. However, the mechanism that allows expression of tissue-specific genes at levels that prevent harm is unknown. Here we show that Brg1 generates accessibility at tissue-specific loci to impose central tolerance. We found that Aire has an intrinsic repressive function that restricts chromatin accessibility and opposes Brg1 across the genome. Aire exerted this repressive influence within minutes after recruitment to chromatin and restrained the amplitude of active transcription. Disease-causing mutations that impair Aire-induced activation also impair the protein's repressive function, which indicates dual roles for Aire. Together, Brg1 and Aire fine-tune the expression of tissue-specific genes at levels that prevent toxicity yet promote immune tolerance.
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Affiliation(s)
- Andrew S Koh
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA.
- Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA, USA.
- Howard Hughes Medical Institute, Chevy Chase, MD, USA.
| | - Erik L Miller
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
- Howard Hughes Medical Institute, Chevy Chase, MD, USA
- Department of Genetics, Stanford University School of Medicine, Stanford, CA, USA
| | - Jason D Buenrostro
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Harvard Society of Fellows, Harvard University, Cambridge, MA, USA
| | - David M Moskowitz
- Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA, USA
- Department of Genetics, Stanford University School of Medicine, Stanford, CA, USA
| | - Jing Wang
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - William J Greenleaf
- Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA, USA
- Department of Genetics, Stanford University School of Medicine, Stanford, CA, USA
- Department of Applied Physics, Stanford University, Stanford, CA, USA
- Chan Zuckerburg Biohub, San Francisco, CA, USA
| | - Howard Y Chang
- Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA, USA
| | - Gerald R Crabtree
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA.
- Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA, USA.
- Howard Hughes Medical Institute, Chevy Chase, MD, USA.
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198
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Hynds RE, Bonfanti P, Janes SM. Regenerating human epithelia with cultured stem cells: feeder cells, organoids and beyond. EMBO Mol Med 2018; 10:139-150. [PMID: 29288165 PMCID: PMC5801505 DOI: 10.15252/emmm.201708213] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/26/2017] [Accepted: 11/29/2017] [Indexed: 12/20/2022] Open
Abstract
More than 40 years ago, Howard Green's laboratory developed a method for long-term expansion of primary human epidermal keratinocytes by co-culture with 3T3 mouse embryonic fibroblasts. This was a breakthrough for in vitro cultivation of cells from human skin and later for other epithelia: it led to the first stem cell therapy using cultured cells and has vastly increased our understanding of epithelial stem cell biology. In recent years, new methods to expand epithelial cells as three-dimensional organoids have provided novel means to investigate the functions of these cells in health and disease. Here, we outline the history of stratified epithelial stem cell culture and the application of cultured epithelial cells in clinical therapies. We further discuss the derivation of organoids from other types of epithelia and the challenges that remain for the translation of novel stem cell therapies toward clinical use.
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Affiliation(s)
- Robert E Hynds
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, UK
- CRUK Lung Cancer Centre of Excellence, UCL Cancer Institute, University College London, London, UK
- The Francis Crick Institute, London, UK
| | - Paola Bonfanti
- The Francis Crick Institute, London, UK
- Great Ormond Street Institute of Child Health, University College London, London, UK
- Institute of Immunity and Transplantation, University College London, London, UK
| | - Sam M Janes
- Lungs for Living Research Centre, UCL Respiratory, University College London, London, UK
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199
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Protein aggregation of the p63 transcription factor underlies severe skin fragility in AEC syndrome. Proc Natl Acad Sci U S A 2018; 115:E906-E915. [PMID: 29339502 PMCID: PMC5798343 DOI: 10.1073/pnas.1713773115] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The p63 gene encodes a master regulator of epidermal development and function. Specific mutations in p63 are causative of a life-threatening disorder mainly characterized by severe skin erosions and cleft palate. Little is known about the mechanisms underlying disease pathology and possible treatments. Based on biochemical studies, genetic mouse models, and functional assays, we demonstrate that these mutations cause p63 protein misfolding and aggregation. Protein aggregation lead to reduced DNA binding and impaired transcriptional activity. Importantly, genetic modifications of p63 that abolish aggregation of the mutant proteins rescue its function, revealing that ankyloblepharon-ectodermal defects-cleft lip/palate syndrome is a protein aggregation disorder and opening avenues for therapeutic intervention. The p63 gene encodes a master regulator of epidermal commitment, development, and differentiation. Heterozygous mutations in the C-terminal domain of the p63 gene can cause ankyloblepharon-ectodermal defects-cleft lip/palate (AEC) syndrome, a life-threatening disorder characterized by skin fragility and severe, long-lasting skin erosions. Despite deep knowledge of p63 functions, little is known about mechanisms underlying disease pathology and possible treatments. Here, we show that multiple AEC-associated p63 mutations, but not those causative of other diseases, lead to thermodynamic protein destabilization, misfolding, and aggregation, similar to the known p53 gain-of-function mutants found in cancer. AEC mutant proteins exhibit impaired DNA binding and transcriptional activity, leading to dominant negative effects due to coaggregation with wild-type p63 and p73. Importantly, p63 aggregation occurs also in a conditional knock-in mouse model for the disorder, in which the misfolded p63 mutant protein leads to severe epidermal defects. Variants of p63 that abolish aggregation of the mutant proteins are able to rescue p63’s transcriptional function in reporter assays as well as in a human fibroblast-to-keratinocyte conversion assay. Our studies reveal that AEC syndrome is a protein aggregation disorder and opens avenues for therapeutic intervention.
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Abbas HA, Bui NHB, Rajapakshe K, Wong J, Gunaratne P, Tsai KY, Coarfa C, Flores ER. Distinct TP63 Isoform-Driven Transcriptional Signatures Predict Tumor Progression and Clinical Outcomes. Cancer Res 2018; 78:451-462. [PMID: 29180475 PMCID: PMC5771893 DOI: 10.1158/0008-5472.can-17-1803] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 10/25/2017] [Accepted: 11/14/2017] [Indexed: 02/04/2023]
Abstract
TP63 is required to maintain stem cell pluripotency and suppresses the metastatic potential of cancer cells through multiple mechanisms. These functions are differentially regulated by individual isoforms, necessitating a deeper understanding of how the distinct transcriptional programs controlled by these isoforms affect cancer progression and outcomes. In this study, we conducted a pan-cancer analysis of The Cancer Genome Atlas to identify transcriptional networks regulated by TAp63 and ΔNp63 using transcriptomes derived from epidermal cells of TAp63-/- and ΔNp63-/- mice. Analysis of 17 cancer developmental and 27 cancer progression signatures revealed a consistent tumor suppressive pattern for TAp63. In contrast, we identified pleiotropic roles for ΔNp63 in tumor development and found that its regulation of Lef1 was crucial for its oncogenic role. ΔNp63 performed a distinctive role as suppressor of tumor progression by cooperating with TAp63 to modulate key biological pathways, principally cell-cycle regulation, extracellular matrix remodeling, epithelial-to-mesenchymal transition, and the enrichment of pluripotent stem cells. Importantly, these TAp63 and ΔNp63 signatures prognosticated progression and survival, even within specific stages, in bladder and renal carcinomas as well as low-grade gliomas. These data describe a novel approach for understanding transcriptional activities of TP63 isoforms across a large number of cancer types, potentially enabling identification of patient subsets most likely to benefit from therapies predicated on manipulating specific TP63 isoforms.Significance: Transcriptomic analyses of patient samples and murine knockout models highlight the prognostic role of several critical mechanisms of tumor suppression that are regulated by TP63. Cancer Res; 78(2); 451-62. ©2017 AACR.
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Affiliation(s)
- Hussein A Abbas
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center, Tampa, Florida
- Department of Cutaneous Oncology, H. Lee Moffitt Cancer Center, Tampa, Florida
| | - Ngoc Hoang Bao Bui
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center, Tampa, Florida
- Department of Cutaneous Oncology, H. Lee Moffitt Cancer Center, Tampa, Florida
- Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Kimal Rajapakshe
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas
| | - Justin Wong
- Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Texas
| | - Preethi Gunaratne
- Department of Biology and Biochemistry, University of Houston, Houston, Texas
| | - Kenneth Y Tsai
- Department of Cutaneous Oncology, H. Lee Moffitt Cancer Center, Tampa, Florida
- Department of Pathology, H. Lee Moffitt Cancer Center, Tampa, Florida
- Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center, Tampa, Florida
| | - Cristian Coarfa
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas.
| | - Elsa R Flores
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center, Tampa, Florida.
- Department of Cutaneous Oncology, H. Lee Moffitt Cancer Center, Tampa, Florida
- Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center, Tampa, Florida
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