1
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Zheng D, Elnegiry AA, Luo C, Bendahou MA, Xie L, Bell D, Takahashi Y, Hanna E, Mias GI, Tsoi MF, Gu B. Brd4::Nutm1 fusion gene initiates NUT carcinoma in vivo. Life Sci Alliance 2024; 7:e202402602. [PMID: 38724194 PMCID: PMC11082452 DOI: 10.26508/lsa.202402602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 05/12/2024] Open
Abstract
NUT carcinoma (NC) is an aggressive cancer with no effective treatment. About 70% of NUT carcinoma is associated with chromosome translocation events that lead to the formation of a BRD4::NUTM1 fusion gene. Because the BRD4::NUTM1 gene is unequivocally cytotoxic when ectopically expressed in cell lines, questions remain on whether the fusion gene can initiate NC. Here, we report the first genetically engineered mouse model for NUT carcinoma that recapitulates the human t(15;19) chromosome translocation in mice. We demonstrated that the mouse t(2;17) syntenic chromosome translocation, forming the Brd4::Nutm1 fusion gene, could induce aggressive carcinomas in mice. The tumors present histopathological and molecular features similar to human NC, with enrichment of undifferentiated cells. Similar to the reports of human NC incidence, Brd4::Nutm1 can induce NC from a broad range of tissues with a strong phenotypical variability. The consistent induction of poorly differentiated carcinoma demonstrated a strong reprogramming activity of BRD4::NUTM1. The new mouse model provided a critical preclinical model for NC that will lead to better understanding and therapy development for NC.
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Affiliation(s)
- Dejin Zheng
- https://ror.org/05hs6h993 Department of Obstetrics, Gynecology and Reproductive Biology, College of Human Medicine, Michigan State University, East Lansing, MI, USA
- https://ror.org/05hs6h993 Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, USA
| | - Ahmed A Elnegiry
- https://ror.org/05hs6h993 Department of Obstetrics, Gynecology and Reproductive Biology, College of Human Medicine, Michigan State University, East Lansing, MI, USA
- https://ror.org/05hs6h993 Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, USA
- Home Institution: Department of Cytology and Histology, Faculty of Veterinary Medicine, Aswan University, Aswan, Egypt
| | - Chenxiang Luo
- https://ror.org/05hs6h993 Department of Obstetrics, Gynecology and Reproductive Biology, College of Human Medicine, Michigan State University, East Lansing, MI, USA
- https://ror.org/05hs6h993 Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, USA
- Home Institution: Center for Reproductive Medicine and Department of Gynecology & Obstetrics, the First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, PR China
| | - Mohammed Amine Bendahou
- Infection Biology and Cancer Biology Program, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Liangqi Xie
- Infection Biology and Cancer Biology Program, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Diana Bell
- City of Hope Comprehensive Cancer Center, Pathology, Duarte, CA, USA
| | - Yoko Takahashi
- Department of Head and Neck Surgery, the University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ehab Hanna
- Department of Head and Neck Surgery, the University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - George I Mias
- https://ror.org/05hs6h993 Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, USA
- https://ror.org/05hs6h993 Department of Biochemistry and Molecular Biology, College of Nature Science, Michigan State University, East Lansing, MI, USA
| | - Mayra F Tsoi
- https://ror.org/05hs6h993 Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA
| | - Bin Gu
- https://ror.org/05hs6h993 Department of Obstetrics, Gynecology and Reproductive Biology, College of Human Medicine, Michigan State University, East Lansing, MI, USA
- https://ror.org/05hs6h993 Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, USA
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2
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Easter QT, Fernandes Matuck B, Beldorati Stark G, Worth CL, Predeus AV, Fremin B, Huynh K, Ranganathan V, Ren Z, Pereira D, Rupp BT, Weaver T, Miller K, Perez P, Hasuike A, Chen Z, Bush M, Qu X, Lee J, Randell SH, Wallet SM, Sequeira I, Koo H, Tyc KM, Liu J, Ko KI, Teichmann SA, Byrd KM. Single-cell and spatially resolved interactomics of tooth-associated keratinocytes in periodontitis. Nat Commun 2024; 15:5016. [PMID: 38876998 PMCID: PMC11178863 DOI: 10.1038/s41467-024-49037-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 05/20/2024] [Indexed: 06/16/2024] Open
Abstract
Periodontitis affects billions of people worldwide. To address relationships of periodontal niche cell types and microbes in periodontitis, we generated an integrated single-cell RNA sequencing (scRNAseq) atlas of human periodontium (34-sample, 105918-cell), including sulcular and junctional keratinocytes (SK/JKs). SK/JKs displayed altered differentiation states and were enriched for effector cytokines in periodontitis. Single-cell metagenomics revealed 37 bacterial species with cell-specific tropism. Fluorescence in situ hybridization detected intracellular 16 S and mRNA signals of multiple species and correlated with SK/JK proinflammatory phenotypes in situ. Cell-cell communication analysis predicted keratinocyte-specific innate and adaptive immune interactions. Highly multiplexed immunofluorescence (33-antibody) revealed peri-epithelial immune foci, with innate cells often spatially constrained around JKs. Spatial phenotyping revealed immunosuppressed JK-microniches and SK-localized tertiary lymphoid structures in periodontitis. Here, we demonstrate impacts on and predicted interactomics of SK and JK cells in health and periodontitis, which requires further investigation to support precision periodontal interventions in states of chronic inflammation.
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Affiliation(s)
- Quinn T Easter
- Lab of Oral & Craniofacial Innovation (LOCI), Department of Innovation & Technology Research, ADA Science & Research Institute, Gaithersburg, MD, USA
| | - Bruno Fernandes Matuck
- Lab of Oral & Craniofacial Innovation (LOCI), Department of Innovation & Technology Research, ADA Science & Research Institute, Gaithersburg, MD, USA
| | | | | | | | | | - Khoa Huynh
- Department of Biostatistics, Virginia Commonwealth University, Richmond, VA, USA
| | | | - Zhi Ren
- Biofilm Research Laboratories, Center for Innovation & Precision Dentistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Diana Pereira
- Center for Oral Immunobiology and Regenerative Medicine, Barts Centre for Squamous Cancer, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Brittany T Rupp
- Lab of Oral & Craniofacial Innovation (LOCI), Department of Innovation & Technology Research, ADA Science & Research Institute, Gaithersburg, MD, USA
| | - Theresa Weaver
- Lab of Oral & Craniofacial Innovation (LOCI), Department of Innovation & Technology Research, ADA Science & Research Institute, Gaithersburg, MD, USA
| | | | - Paola Perez
- Salivary Disorders Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Akira Hasuike
- Lab of Oral & Craniofacial Innovation (LOCI), Department of Innovation & Technology Research, ADA Science & Research Institute, Gaithersburg, MD, USA
- Department of Periodontology, Nihon University School of Dentistry, Tokyo, Japan
| | - Zhaoxu Chen
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Mandy Bush
- Respiratory TRACTS Core, Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Xufeng Qu
- VCU Massey Comprehensive Cancer Center, Bioinformatics Shared Resource Core, Virginia Commonwealth University, Richmond, VA, USA
| | - Janice Lee
- Craniofacial Anomalies & Regeneration Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Scott H Randell
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Shannon M Wallet
- Division of Oral and Craniofacial Health Sciences, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL, USA
| | - Inês Sequeira
- Center for Oral Immunobiology and Regenerative Medicine, Barts Centre for Squamous Cancer, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Hyun Koo
- Biofilm Research Laboratories, Center for Innovation & Precision Dentistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Katarzyna M Tyc
- Department of Biostatistics, Virginia Commonwealth University, Richmond, VA, USA
- VCU Massey Comprehensive Cancer Center, Bioinformatics Shared Resource Core, Virginia Commonwealth University, Richmond, VA, USA
| | - Jinze Liu
- Department of Biostatistics, Virginia Commonwealth University, Richmond, VA, USA
- VCU Massey Comprehensive Cancer Center, Bioinformatics Shared Resource Core, Virginia Commonwealth University, Richmond, VA, USA
| | - Kang I Ko
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Sarah A Teichmann
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
- Department of Physics, Cavendish Laboratory, Cambridge, UK
| | - Kevin M Byrd
- Lab of Oral & Craniofacial Innovation (LOCI), Department of Innovation & Technology Research, ADA Science & Research Institute, Gaithersburg, MD, USA.
- Salivary Disorders Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA.
- Division of Oral and Craniofacial Health Sciences, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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3
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Baquero J, Tang XH, Ferrotta A, Zhang T, DiKun KM, Gudas LJ. The transcription factor BMI1 increases hypoxic signaling in oral cavity epithelia. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167161. [PMID: 38599260 DOI: 10.1016/j.bbadis.2024.167161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/07/2024] [Accepted: 04/04/2024] [Indexed: 04/12/2024]
Abstract
The tongue epithelium is maintained by a proliferative basal layer. This layer contains long-lived stem cells (SCs), which produce progeny cells that move up to the surface as they differentiate. B-lymphoma Mo-MLV insertion region 1 (BMI1), a protein in mammalian Polycomb Repressive Complex 1 (PRC1) and a biomarker of oral squamous cell carcinoma, is expressed in almost all basal epithelial SCs of the tongue, and single, Bmi1-labelled SCs give rise to cells in all epithelial layers. We previously developed a transgenic mouse model (KrTB) containing a doxycycline- (dox) controlled, Tet-responsive element system to selectively overexpress Bmi1 in the tongue basal epithelial SCs. Here, we used this model to assess BMI1 actions in tongue epithelia. Genome-wide transcriptomics revealed increased levels of transcripts involved in the cellular response to hypoxia in Bmi1-overexpressing (KrTB+DOX) oral epithelia even though these mice were not subjected to hypoxia conditions. Ectopic Bmi1 expression in tongue epithelia increased the levels of hypoxia inducible factor-1 alpha (HIF1α) and HIF1α targets linked to metabolic reprogramming during hypoxia. We used chromatin immunoprecipitation (ChIP) to demonstrate that Bmi1 associates with the promoters of HIF1A and HIF1A-activator RELA (p65) in tongue epithelia. We also detected increased SC proliferation and oxidative stress in Bmi1-overexpressing tongue epithelia. Finally, using a human oral keratinocyte line (OKF6-TERT1R), we showed that ectopic BMI1 overexpression decreases the oxygen consumption rate while increasing the extracellular acidification rate, indicative of elevated glycolysis. Thus, our data demonstrate that high BMI1 expression drives hypoxic signaling, including metabolic reprogramming, in normal oral cavity epithelia.
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Affiliation(s)
- Jorge Baquero
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA; Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Xiao-Han Tang
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA; Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Annalisa Ferrotta
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA; Department of Pharmacology, Weill Cornell Graduate School of Biomedical Sciences, New York, NY, USA
| | - Tuo Zhang
- Weill Cornell Genomics Core Facility, Weill Cornell Medical College, New York, NY, USA
| | - Krysta M DiKun
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA; Department of Pharmacology, Weill Cornell Graduate School of Biomedical Sciences, New York, NY, USA
| | - Lorraine J Gudas
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA; Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA; Department of Pharmacology, Weill Cornell Graduate School of Biomedical Sciences, New York, NY, USA.
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4
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Grommisch D, Wang M, Eenjes E, Svetličič M, Deng Q, Giselsson P, Genander M. Defining the contribution of Troy-positive progenitor cells to the mouse esophageal epithelium. Dev Cell 2024; 59:1269-1283.e6. [PMID: 38565145 DOI: 10.1016/j.devcel.2024.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/22/2023] [Accepted: 03/08/2024] [Indexed: 04/04/2024]
Abstract
Progenitor cells adapt their behavior in response to tissue demands. However, the molecular mechanisms controlling esophageal progenitor decisions remain largely unknown. Here, we demonstrate the presence of a Troy (Tnfrsf19)-expressing progenitor subpopulation localized to defined regions along the mouse esophageal axis. Lineage tracing and mathematical modeling demonstrate that Troy-positive progenitor cells are prone to undergoing symmetrical fate choices and contribute to esophageal tissue homeostasis long term. Functionally, TROY inhibits progenitor proliferation and enables commitment to differentiation without affecting fate symmetry. Whereas Troy expression is stable during esophageal homeostasis, progenitor cells downregulate Troy in response to tissue stress, enabling proliferative expansion of basal cells refractory to differentiation and reestablishment of tissue homeostasis. Our results demonstrate functional, spatially restricted progenitor heterogeneity in the esophageal epithelium and identify how dynamic regulation of Troy coordinates tissue generation.
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Affiliation(s)
- David Grommisch
- Department of Cell and Molecular Biology, Karolinska Institutet, Solna, Sweden
| | - Menghan Wang
- Department of Physiology and Pharmacology, Karolinska Institutet, Solna, Sweden
| | - Evelien Eenjes
- Department of Cell and Molecular Biology, Karolinska Institutet, Solna, Sweden
| | - Maja Svetličič
- Department of Cell and Molecular Biology, Karolinska Institutet, Solna, Sweden
| | - Qiaolin Deng
- Department of Physiology and Pharmacology, Karolinska Institutet, Solna, Sweden
| | | | - Maria Genander
- Department of Cell and Molecular Biology, Karolinska Institutet, Solna, Sweden.
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5
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Ideno H, Nakashima K, Komatsu K, Kimura H, Shinkai Y, Tachibana M, Nifuji A. Epigenetic modifier G9a is involved in regulation of mouse tongue development. J Oral Biosci 2024; 66:35-40. [PMID: 38142940 DOI: 10.1016/j.job.2023.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 12/26/2023]
Abstract
OBJECTIVES The tongue comprises multiple tissues of different embryonic origins, including pharyngeal arch, somite, and cranial neural crest (CNC). However, its developmental regulatory mechanisms, especially those involving epigenetic modifiers, remain poorly understood. This study examined the roles of the epigenetic modifier G9a in murine tongue development. METHODS We deleted G9a using Sox 9 (SRY-related HMG-box gene 9)-Cre recombinase, which acts in tongue progenitor cells, including CNC-derived cells, to generate G9a conditional knockout (cKO) mice. Histochemical and immunohistochemical analyses were conducted on sections prepared from tongue tissues of control and cKO mice. RESULTS Cre-dependent LacZ reporter mice, generated by crossing Rosa-LacZ mice with sox9-Cre mice, revealed Cre recombinase activity in the mucosal epithelium and tongue connective tissue of the embryonic tongue. Tongue volume was significantly reduced on embryonic day 17.5 (E17.5) and postnatal day 0 (P0) in cKO mice. Histological sections showed that the lingual mucosal epithelium was thinner in cKO mice. Reduced G9a levels were accompanied by decreased levels of a G9a substrate, dimethylated lysine 9 in histone H3, in the embryonic tongue. BrdU injection at E16.5 revealed reduced numbers of BrdU-positive cells in the mucosal epithelium and underlying connective tissue at E17.5 in cKO mice, indicating suppression of cell proliferation in both tissues. Investigation of keratin 5 and 8 protein localization showed significantly suppressed expression in the lingual mucosal epithelium in cKO mice. CONCLUSIONS G9a is required for proper proliferation and differentiation of sox9-expressing tongue progenitor cells and is thereby involved in tongue development.
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Affiliation(s)
- Hisashi Ideno
- Department of Pharmacology, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa 230-8501, Japan
| | - Kazuhisa Nakashima
- Department of Pharmacology, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa 230-8501, Japan
| | - Koichiro Komatsu
- Department of Pharmacology, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa 230-8501, Japan
| | - Hiroshi Kimura
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, Kanagawa 226-8503, Japan
| | - Yoichi Shinkai
- Cellular Memory Laboratory, RIKEN Cluster for Pioneering Research, Wako 351-0198, Saitama, Japan
| | - Makoto Tachibana
- Laboratory of Epigenome Dynamics, Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan
| | - Akira Nifuji
- Department of Pharmacology, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa 230-8501, Japan.
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6
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Nikoloudaki G, Hamilton DW. Assessing the fate and contribution of Foxd1-expressing embryonic precursors and their progeny in palatal development, homeostasis and excisional repair. Sci Rep 2024; 14:4969. [PMID: 38424240 PMCID: PMC10904772 DOI: 10.1038/s41598-024-55486-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 02/23/2024] [Indexed: 03/02/2024] Open
Abstract
Oral mucosal tissues heal rapidly with minimal scarring, although palatal mucosa can be associated with excessive fibrosis in response to injury. Investigations on the balance between neovascularization and tissue repair suggests regulation of angiogenesis is an important determinant of repair versus scarring. Associated with pericyte mediated fibrosis in kidney injury, FoxD1 is implicated in growth centres during cranio-facial development, although which cell lineages are derived from these embryonic populations in development and in adult animals is unknown. Using a lineage tracing approach, we assessed the fate of embryonic Foxd1-expressing progenitor cells and their progeny in palatal development and during wound healing in adult mice. During palatal development as well as in post-natal tissues, Foxd1-lineage progeny were associated with the vasculature and the epineurium. Post-injury, de novo expression of FoxD1 was not detectable, although Foxd1-lineage progeny expanded while exhibiting low association with the fibroblast/myofibroblast markers PDGFα, PDGFβ, vimentin, α-smooth muscle actin, as well as the neuronal associated markers S100β and p75NTR. Foxd1-lineage progeny were primarily associated with CD146, CD31, and to a lesser extent CD105, remaining in close proximity to developing neovascular structures. Our findings demonstrate that FoxD1 derived cells are predominantly associated with the palatal vasculature and provide strong evidence that FoxD1 derived cells do not give rise to populations involved directly in the scarring of the palate.
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Affiliation(s)
- Georgia Nikoloudaki
- Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, Western University, London, ON, N6A 5C1, Canada
- Schulich Dentistry, Schulich School of Medicine and Dentistry, Western University, London, ON, N6A 5C1, Canada
| | - Douglas W Hamilton
- Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, Western University, London, ON, N6A 5C1, Canada.
- Schulich Dentistry, Schulich School of Medicine and Dentistry, Western University, London, ON, N6A 5C1, Canada.
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7
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Stöger R, Choi M, Begum K, Leeman G, Emes RD, Melamed P, Bentley GR. Childhood environment influences epigenetic age and methylation concordance of a CpG clock locus in British-Bangladeshi migrants. Epigenetics 2023; 18:2153511. [PMID: 36495138 PMCID: PMC9980690 DOI: 10.1080/15592294.2022.2153511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Migration from one location to another often comes with a change in environmental conditions. Here, we analysed features of DNA methylation in young, adult British-Bangladeshi women who experienced different environments during their childhoods: a) migrants, who grew up in Bangladesh with exposure to comparatively higher pathogen loads and poorer health care, and b) second-generation British-Bangladeshis, born to Bangladeshi parents, who grew up in the UK. We used buccal DNA to estimate DNA methylation-based age (DNAm age) from 14 migrants and 11 second-generation migrants, aged 18-35 years. 'AgeAccel,' a measure of DNAm age, independent of chronological age, showed that the group of women who spent their childhood in Bangladesh had higher AgeAccel (P = 0.028), compared to their UK peers. Since epigenetic clocks have been proposed to be associated with maintenance processes of epigenetic systems, we evaluated the preference for concordant DNA methylation at the luteinizing hormone/choriogonadotropin receptor (LHCGR/LHR) locus, which harbours one of the CpGs contributing to Horvath's epigenetic clock. Measurements on both strands of individual, double-stranded DNA molecules indicate higher stability of DNA methylation states at this LHCGR/LHR locus in samples of women who grew up in Bangladesh. Together, our two independent analytical approaches imply that childhood environments may induce subtle changes that are detectable long after exposure occurred, which might reflect altered activity of the epigenetic maintenance system or a difference in the proportion of cell types in buccal tissue. This exploratory work supports our earlier findings that adverse childhood environments lead to phenotypic life history trade-offs.
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Affiliation(s)
- Reinhard Stöger
- School of Biosciences, University of Nottingham, Nottingham, UK
| | - Minseung Choi
- School of Medicine, Stanford University, Stanford, CA, USA
| | | | - Gregory Leeman
- School of Biosciences, University of Nottingham, Nottingham, UK
| | - Richard D Emes
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, UK.,Advanced Data Analysis Centre, University of Nottingham, Nottingham, UK
| | - Philippa Melamed
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Gillian R Bentley
- Department of Anthropology, Durham University, Durham, UK.,Wolfson Research Institute for Health and Wellbeing, Durham University, Durham, UK
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8
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Hicks MR, Saleh KK, Clock B, Gibbs DE, Yang M, Younesi S, Gane L, Gutierrez-Garcia V, Xi H, Pyle AD. Regenerating human skeletal muscle forms an emerging niche in vivo to support PAX7 cells. Nat Cell Biol 2023; 25:1758-1773. [PMID: 37919520 PMCID: PMC10709143 DOI: 10.1038/s41556-023-01271-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 09/26/2023] [Indexed: 11/04/2023]
Abstract
Skeletal muscle stem and progenitor cells including those derived from human pluripotent stem cells (hPSCs) offer an avenue towards personalized therapies and readily fuse to form human-mouse myofibres in vivo. However, skeletal muscle progenitor cells (SMPCs) inefficiently colonize chimeric stem cell niches and instead associate with human myofibres resembling foetal niches. We hypothesized competition with mouse satellite cells (SCs) prevented SMPC engraftment into the SC niche and thus generated an SC ablation mouse compatible with human engraftment. Single-nucleus RNA sequencing of SC-ablated mice identified the absence of a transient myofibre subtype during regeneration expressing Actc1. Similarly, ACTC1+ human myofibres supporting PAX7+ SMPCs increased in SC-ablated mice, and after re-injury we found SMPCs could now repopulate into chimeric niches. To demonstrate ACTC1+ myofibres are essential to supporting PAX7 SMPCs, we generated caspase-inducible ACTC1 depletion human pluripotent stem cells, and upon SMPC engraftment we found a 90% reduction in ACTC1+ myofibres and a 100-fold decrease in PAX7 cell numbers compared with non-induced controls. We used spatial RNA sequencing to identify key factors driving emerging human niche formation between ACTC1+ myofibres and PAX7+ SMPCs in vivo. This revealed that transient regenerating human myofibres are essential for emerging niche formation in vivo to support PAX7 SMPCs.
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Affiliation(s)
- Michael R Hicks
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, CA, USA.
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, CA, USA.
- Physiology and Biophysics, University of California, Irvine, CA, USA.
| | - Kholoud K Saleh
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, CA, USA
- Molecular, Cellular & Integrative Physiology Program, University of California, Los Angeles, CA, USA
| | - Ben Clock
- Physiology and Biophysics, University of California, Irvine, CA, USA
| | - Devin E Gibbs
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, CA, USA
- Molecular Biology Institute, University of California, Los Angeles, CA, USA
| | - Mandee Yang
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, CA, USA
| | - Shahab Younesi
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, CA, USA
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, CA, USA
| | - Lily Gane
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, CA, USA
| | | | - Haibin Xi
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, CA, USA
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, CA, USA
| | - April D Pyle
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, CA, USA.
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, CA, USA.
- Molecular Biology Institute, University of California, Los Angeles, CA, USA.
- Jonnson Comprehensive Cancer Center, University of California, Los Angeles, CA, USA.
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9
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Salahudeen AA, Seoane JA, Yuki K, Mah AT, Smith AR, Kolahi K, De la O SM, Hart DJ, Ding J, Ma Z, Barkal SA, Shukla ND, Zhang CH, Cantrell MA, Batish A, Usui T, Root DE, Hahn WC, Curtis C, Kuo CJ. Functional screening of amplification outlier oncogenes in organoid models of early tumorigenesis. Cell Rep 2023; 42:113355. [PMID: 37922313 PMCID: PMC10841581 DOI: 10.1016/j.celrep.2023.113355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 08/30/2023] [Accepted: 10/12/2023] [Indexed: 11/05/2023] Open
Abstract
Somatic copy number gains are pervasive across cancer types, yet their roles in oncogenesis are insufficiently evaluated. This inadequacy is partly due to copy gains spanning large chromosomal regions, obscuring causal loci. Here, we employed organoid modeling to evaluate candidate oncogenic loci identified via integrative computational analysis of extreme copy gains overlapping with extreme expression dysregulation in The Cancer Genome Atlas. Subsets of "outlier" candidates were contextually screened as tissue-specific cDNA lentiviral libraries within cognate esophagus, oral cavity, colon, stomach, pancreas, and lung organoids bearing initial oncogenic mutations. Iterative analysis nominated the kinase DYRK2 at 12q15 as an amplified head and neck squamous carcinoma oncogene in p53-/- oral mucosal organoids. Similarly, FGF3, amplified at 11q13 in 41% of esophageal squamous carcinomas, promoted p53-/- esophageal organoid growth reversible by small molecule and soluble receptor antagonism of FGFRs. Our studies establish organoid-based contextual screening of candidate genomic drivers, enabling functional evaluation during early tumorigenesis.
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Affiliation(s)
- Ameen A Salahudeen
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA; University of Illinois at Chicago College of Medicine, Department of Medicine, Division of Hematology and Oncology, Chicago, IL 60612, USA; Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago College of Medicine, Chicago, IL 60612, USA; University of Illinois Cancer Center, Chicago, IL 60612, USA.
| | - Jose A Seoane
- Stanford University School of Medicine, Department of Medicine, Divisions of Oncology, Stanford, CA 94305, USA; Cancer Computational Biology Group, Vall d'Hebron Institute of Oncology (VHIO), 08035 Barcelona, Spain.
| | - Kanako Yuki
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Amanda T Mah
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Amber R Smith
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Kevin Kolahi
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Sean M De la O
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Daniel J Hart
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Jie Ding
- Stanford University School of Medicine, Department of Medicine, Divisions of Oncology, Stanford, CA 94305, USA
| | - Zhicheng Ma
- Stanford University School of Medicine, Department of Medicine, Divisions of Oncology, Stanford, CA 94305, USA
| | - Sammy A Barkal
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Navika D Shukla
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Chuck H Zhang
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Michael A Cantrell
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Arpit Batish
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - Tatsuya Usui
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA
| | - David E Root
- Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, MA 02142, USA
| | - William C Hahn
- Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, MA 02142, USA; Dana-Farber Cancer Institute, Department of Medical Oncology, 450 Brookline Avenue, Boston, MA 02215, USA
| | - Christina Curtis
- Stanford University School of Medicine, Department of Medicine, Divisions of Oncology, Stanford, CA 94305, USA; Stanford University School of Medicine, Department of Medicine, Divisions of Genetics, Stanford, CA 94305, USA
| | - Calvin J Kuo
- Stanford University School of Medicine, Department of Medicine, Divisions of Hematology, Stanford, CA 94305, USA.
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10
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Gutkind JS, Faraji F, Ramirez S, Clubb L, Sato K, Quiroz PA, Galloway W, Mikulski Z, Hoang T, Medetgul-Ernar K, Marangoni P, Jones K, Officer A, Molinolo A, Kim K, Sakaguchi K, Califano J, Smith Q, Klein O, Tamayo P. YAP-Driven Malignant Reprogramming of Epithelial Stem Cells at Single Cell Resolution. RESEARCH SQUARE 2023:rs.3.rs-3426301. [PMID: 37961717 PMCID: PMC10635308 DOI: 10.21203/rs.3.rs-3426301/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Tumor initiation represents the first step in tumorigenesis during which normal progenitor cells undergo cell fate transition to cancer. Capturing this process as it occurs in vivo, however, remains elusive. Here we employ cell tracing approaches with spatiotemporally controlled oncogene activation and tumor suppressor inhibition to unveil the processes underlying oral epithelial progenitor cell reprogramming into cancer stem cells (CSCs) at single cell resolution. This revealed the rapid emergence of a distinct stem-like cell state, defined by aberrant proliferative, hypoxic, squamous differentiation, and partial epithelial to mesenchymal (pEMT) invasive gene programs. Interestingly, CSCs harbor limited cell autonomous invasive capacity, but instead recruit myeloid cells to remodel the basement membrane and ultimately initiate tumor invasion. CSC transcriptional programs are conserved in human carcinomas and associated with poor patient survival. These findings illuminate the process of cancer initiation at single cell resolution, thus identifying candidate targets for early cancer detection and prevention.
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Affiliation(s)
| | - Farhoud Faraji
- University of California San Diego Health Department of Otolaryngology-Head and Neck Surgery and Moores Cancer Center
| | | | - Lauren Clubb
- University of California San Diego Health Moores Cancer Center
| | - Kuniaki Sato
- University of California San Diego Health Moores Cancer Center
| | | | - William Galloway
- University of California Irvine Department of Chemical and Biomolecular Engineering
| | | | - Thomas Hoang
- University of California San Diego Health Moores Cancer Center
| | | | - Pauline Marangoni
- Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco
| | - Kyle Jones
- University of California San Francisco (UCSF)
| | - Adam Officer
- University of California San Diego Health Moores Cancer Center
| | | | | | | | | | - Quinton Smith
- University of California Irvine Department of Chemical and Biomolecular Engineering
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11
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Faraji F, Ramirez SI, Clubb LM, Sato K, Quiroz PYA, Galloway WMG, Mikulski Z, Hoang TS, Medetgul-Ernar K, Marangoni P, Jones KB, Officer A, Molinolo AA, Kim K, Sakaguchi K, Califano JA, Smith Q, Klein OD, Tamayo P, Gutkind JS. Direct reprogramming of oral epithelial progenitor cells to cancer stem cells at single cell resolution in vivo. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.24.550427. [PMID: 37546810 PMCID: PMC10402053 DOI: 10.1101/2023.07.24.550427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Tumor initiation represents the initial step in tumorigenesis during which normal progenitor cells undergo cell fate transition to cancer. Most studies investigating cancer-driving mechanisms in solid tumors rely on analyses of established malignant lesions, and thus cannot directly capture processes underlying the reprogramming of normal progenitor cells into cancer cells. Here, using spatiotemporally controlled oncogene expression in a genetically engineered system we demonstrate that concomitant YAP activation and HPV E6-E7 -mediated inhibition of tumor suppressive pathways is sufficient to rapidly reprogram oral epithelial progenitor cells (OEPCs) into cancer stem cells (CSCs). Single cell analyses of these nascent CSCs revealed hallmark transcriptional programs driving tumor initiation. Importantly, these CSC-enriched expression signatures distinguish normal tissue from malignant head and neck tumors and are associated with poor patient survival. Elucidating mechanisms underlying OEPC to CSC reprogramming may offer new insights to halt the conversion of premalignant cells into invasive carcinoma. HIGHLIGHTS YAP and HPV E6-E7 reprogram oral epithelial progenitor cells into cancer stem cells. Single cell analyses reveal the transcriptional architecture of tumor initiation.CSC transcriptional programs distinguish normal tissue from carcinoma.CSC signatures are associated with poor head and neck cancer survival. Abstract Figure
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12
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Wang Y, Xue N, Wang Z, Zeng X, Ji N, Chen Q. Targeting Th17 cells: a promising strategy to treat oral mucosal inflammatory diseases. Front Immunol 2023; 14:1236856. [PMID: 37564654 PMCID: PMC10410157 DOI: 10.3389/fimmu.2023.1236856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 07/06/2023] [Indexed: 08/12/2023] Open
Abstract
With the improved quality of life, oral health is under increased pressure. Numerous common oral mucosal diseases, such as oral lichen planus(OLP) and gingivitis, are related to the destruction of the oral immune barrier. The cytokines secreted by T-helper 17 (Th17) cells are essential for maintaining oral immune homeostasis and play essential roles in immune surveillance. When antigens stimulate the epithelium, Th17 cells expand, differentiate, and generate inflammatory factors to recruit other lymphocytes, such as neutrophils, to clear the infection, which helps to maintain the integrity of the epithelial barrier. In contrast, excessive Th17/IL-17 axis reactions may cause autoimmune damage. Therefore, an in-depth understanding of the role of Th17 cells in oral mucosa may provide prospects for treating oral mucosal diseases. We reviewed the role of Th17 cells in various oral and skin mucosal systemic diseases with oral characteristics, and based on the findings of these reports, we emphasize that Th17 cellular response may be a critical factor in inflammatory diseases of the oral mucosa. In addition, we should pay attention to the role and relationship of "pathogenic Th17" and "non-pathogenic Th17" in oral mucosal diseases. We hope to provide a reference for Th17 cells as a potential therapeutic target for treating oral mucosal inflammatory disorders in the future.
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Affiliation(s)
| | | | | | | | - Ning Ji
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
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13
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Ghosh S, Mitra P, Saha U, Nandi R, Jena S, Ghosh A, Roy SS, Acharya M, Biswas NK, Singh S. NOTCH pathway inactivation reprograms stem-like oral cancer cells to JAK-STAT dependent state and provides the opportunity of synthetic lethality. Transl Oncol 2023; 32:101669. [PMID: 37054548 PMCID: PMC10122064 DOI: 10.1016/j.tranon.2023.101669] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/04/2023] [Accepted: 04/06/2023] [Indexed: 04/15/2023] Open
Abstract
BACKGROUND We have recently provided the evidence of interconvertible cellular states, driving non-genetic heterogeneity among stem-like oral cancer cells (oral-SLCCs). Here, NOTCH pathway-activity status is explored as one of the possible mechanisms behind this stochastic plasticity. METHODS Oral-SLCCs were enriched in 3D-spheroids. Constitutively-active and inactive status of NOTCH pathway was achieved by genetic or pharmacological approaches. RNA sequencing and real-time PCR was performed for gene expression studies. in vitro cytotoxicity assessments were performed by AlamarBlue assay and in vivo effects were studied by xenograft growth in zebrafish embryo. RESULTS We have observed stochastic plasticity in oral-SLCCs, spontaneously maintaining both NOTCH-active and inactive states. While cisplatin refraction was associated with post-treatment adaptation to the active-state of NOTCH pathway, oral-SLCCs with inactive NOTCH pathway status showed aggressive tumor growth and poor prognosis. RNAseq analysis clearly suggested the upregulation of JAK-STAT pathway in NOTCH pathway-inactive subset. The 3D-spheroids with lower NOTCH-activity status displayed significantly higher sensitivity to JAK-selective drugs, Ruxolitinib or Tofacitinib or siRNA mediated downregulation of tested partners STAT3/4. Oral-SLCCs were programmed to adapt the inactive status of NOTCH pathway by exposing to γ-secretase inhibitors, LY411575 or RO4929097, followed by targeting with JAK-inhibitors, Ruxolitinib or Tofacitinib. This approach resulted in a very significant inhibition in viability of 3D-spheroids as well as xenograft initiation in Zebrafish embryos. CONCLUSION Study revealed for the first time that NOTCH pathway-inactive state exhibit activation of JAK-STAT pathways, as synthetic lethal pair. Therefore, co-inhibition of these pathway may serve as novel therapeutic strategy against aggressive oral cancer.
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Affiliation(s)
- Subhashis Ghosh
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Paromita Mitra
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Uday Saha
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Rimpa Nandi
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Subhashree Jena
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Arnab Ghosh
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Shantanu Saha Roy
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Moulinath Acharya
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Nidhan Kumar Biswas
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Sandeep Singh
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India.
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14
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Sterling J, Policastro C, Elyaguov J, Simhan J, Nikolavsky D. How and why tobacco use affects reconstructive surgical practice: a contemporary narrative review. Transl Androl Urol 2023; 12:112-127. [PMID: 36760864 PMCID: PMC9906109 DOI: 10.21037/tau-22-427] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 11/24/2022] [Indexed: 01/05/2023] Open
Abstract
Background and Objective The overall negative impact of tobacco use on an individual's health has been well documented but the literature on tobacco's impact on post-surgical outcomes, specifically the outcomes after urologic surgery, is not as clear cut. The aim of this narrative review is to provide urologists with the information needed to have a nuanced pre-operative counseling conversation with patients about tobacco use. Here we combine publications on the histologic and physiologic changes induced by nicotine and tobacco use with publications from the wider surgical literature on post-operative outcomes in tobacco users. Methods A literature search of PubMed, Google Scholar and Medline was performed using iterations of the following terms: tobacco, nicotine, changes, physiologic, histology, post-operative, and surgical. Non-English publications and abstracts were excluded. Inclusion required agreement from all authors and preference was given to human specimens over animal models for the basic science manuscripts and large database and meta-analyses over single institution experiences. Key Content and Findings Tobacco use results in measurable changes in nearly every organ system in the body. While smokers have increased wound complications, there is no evidence that reconstructive surgery using grafts or flaps fail more frequently in tobacco users. Smokers have an increased risk of respiratory complications following endotracheal intubation. Conclusions Surgeries should not be canceled due to a patient's inability to cease tobacco use. Urologists and patients should engage in joint decision making regarding the timing and pursuit of elective operations.
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Affiliation(s)
- Joshua Sterling
- SUNY Upstate Medical University, Department of Urology, Syracuse, NY, USA;,Yale School of Medicine, Department of Urology, New Haven, CT, USA
| | - Connor Policastro
- SUNY Upstate Medical University, Department of Urology, Syracuse, NY, USA
| | - Jason Elyaguov
- SUNY Upstate Medical University, Department of Urology, Syracuse, NY, USA
| | - Jay Simhan
- Fox Chase Cancer Center, Division of Urologic Oncology and Urology, Philadelphia, PA, USA
| | - Dmitriy Nikolavsky
- SUNY Upstate Medical University, Department of Urology, Syracuse, NY, USA
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15
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Caetano AJ, Redhead Y, Karim F, Dhami P, Kannambath S, Nuamah R, Volponi AA, Nibali L, Booth V, D'Agostino EM, Sharpe PT. Spatially resolved transcriptomics reveals pro-inflammatory fibroblast involved in lymphocyte recruitment through CXCL8 and CXCL10. eLife 2023; 12:81525. [PMID: 36648332 PMCID: PMC9897724 DOI: 10.7554/elife.81525] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 01/16/2023] [Indexed: 01/18/2023] Open
Abstract
The interplay among different cells in a tissue is essential for maintaining homeostasis. Although disease states have been traditionally attributed to individual cell types, increasing evidence and new therapeutic options have demonstrated the primary role of multicellular functions to understand health and disease, opening new avenues to understand pathogenesis and develop new treatment strategies. We recently described the cellular composition and dynamics of the human oral mucosa; however, the spatial arrangement of cells is needed to better understand a morphologically complex tissue. Here, we link single-cell RNA sequencing, spatial transcriptomics, and high-resolution multiplex fluorescence in situ hybridisation to characterise human oral mucosa in health and oral chronic inflammatory disease. We deconvolved expression for resolution enhancement of spatial transcriptomic data and defined highly specialised epithelial and stromal compartments describing location-specific immune programs. Furthermore, we spatially mapped a rare pathogenic fibroblast population localised in a highly immunogenic region, responsible for lymphocyte recruitment through CXCL8 and CXCL10 and with a possible role in pathological angiogenesis through ALOX5AP. Collectively, our study provides a comprehensive reference for the study of oral chronic disease pathogenesis.
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Affiliation(s)
- Ana J Caetano
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College LondonLondonUnited Kingdom
| | - Yushi Redhead
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College LondonLondonUnited Kingdom
| | - Farah Karim
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College LondonLondonUnited Kingdom
- Department of Endodontics, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College LondonLondonUnited Kingdom
| | - Pawan Dhami
- NIHR BRC Genomics Research Platform, Guy’s and St Thomas’ NHS Foundation Trust, King’s College London School of Medicine, Guy’s HospitalLondonUnited Kingdom
| | - Shichina Kannambath
- NIHR BRC Genomics Research Platform, Guy’s and St Thomas’ NHS Foundation Trust, King’s College London School of Medicine, Guy’s HospitalLondonUnited Kingdom
| | - Rosamond Nuamah
- NIHR BRC Genomics Research Platform, Guy’s and St Thomas’ NHS Foundation Trust, King’s College London School of Medicine, Guy’s HospitalLondonUnited Kingdom
| | - Ana A Volponi
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College LondonLondonUnited Kingdom
| | - Luigi Nibali
- Department of Periodontology, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College LondonLondonUnited Kingdom
| | - Veronica Booth
- Department of Periodontology, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College LondonLondonUnited Kingdom
| | | | - Paul T Sharpe
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College LondonLondonUnited Kingdom
- Laboratory of Odontogenesis and Osteogenesis, Institute of Animal Physiology and GeneticsBrnoCzech Republic
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16
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De la Cruz G, Nikolaishvili Feinberg N, Williams SE. Automated Immunofluorescence Staining for Analysis of Mitotic Stages and Division Orientation in Brain Sections. Methods Mol Biol 2023; 2583:63-79. [PMID: 36418726 DOI: 10.1007/978-1-0716-2752-5_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Microcephaly often results from mitotic defects in neuronal progenitors, frequently by decreasing proliferation rates or shifting cell fates. During neurogenesis, oriented cell division-the molecular control of mitotic spindle positioning to control the axis of division-represents an important mechanism to balance expansion of the progenitor pool with generating cellular diversity. While mostly studied in the context of cortical development, more recently, spindle orientation has emerged as a key player in the formation of other brain regions such as the cerebellum. Here we describe methods to perform automated dual-color fluorescent immunohistochemistry on murine cerebellar sections using the mitotic markers phospho-Histone H3 and Survivin, and detail analytical and statistical approaches to display and compare division orientation datasets.
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Affiliation(s)
- Gabriela De la Cruz
- Department of Pathology & Laboratory Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Pathology Services Core, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Nana Nikolaishvili Feinberg
- Department of Pathology & Laboratory Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Pathology Services Core, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Scott E Williams
- Department of Pathology & Laboratory Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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17
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Herms A, Jones PH. Splitting up differentiation and cell cycle exit. Nat Cell Biol 2022; 24:1687-1688. [PMID: 36357620 DOI: 10.1038/s41556-022-01022-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Albert Herms
- Department of Biomedical Sciences, Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain.,Cell Compartments and Signalling Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Philip H Jones
- Wellcome Sanger Institute, Hinxton, UK. .,Department of Oncology, University of Cambridge, Hutchison Research Centre, Cambridge Biomedical Campus, Cambridge, UK.
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18
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Griffin MF, Fahy EJ, King M, Guardino N, Chen K, Abbas DB, Lavin CV, Diaz Deleon NM, Lorenz HP, Longaker MT, Wan DC. Understanding Scarring in the Oral Mucosa. Adv Wound Care (New Rochelle) 2022; 11:537-547. [PMID: 34470520 PMCID: PMC9347381 DOI: 10.1089/wound.2021.0038] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 08/23/2021] [Indexed: 01/29/2023] Open
Abstract
Significance: Skin inevitably heals with the formation of a fibrotic scar. Patients affected by skin scarring suffer from long-term psychological and physical burdens. Recent Advances: Since the discovery of fetal scarless skin-wound healing, research has hoped to identify and mimic scarless healing for adult skin. Oral mucosa healing in adults provides the closest example to fetal scarless healing. Injuries to the oral mucosa heal with very minimal scarring. Understanding the mechanisms through which this process occurs may bring us closer to achieving scarless healing in adults. Critical Issues: In this review, we summarize the current evidence that illustrates distinct mechanisms involved in oral mucosal healing. We discuss the role of the oral niche in contributing to wound repair. The intrinsic properties of immune cells, fibroblasts, and keratinocytes within the oral mucosa that support regenerative repair are provided. We highlight the contribution of cytokines, growth factors, and chemokine secretion in permitting a scarless mucosal environment. Furthermore, we discuss the role of stem cell-like progenitor populations in the mucosa that may contribute to wound healing. We also provide suggestions for future studies that are needed to achieve scarless healing in adults. Future Directions: Many characteristics of the oral mucosa have been shown to contribute to decreased scarring, but the specific mechanism(s) is unclear. Advancing our understanding of oral healing may yield therapeutic therapies that can be used to overcome dermal scarring.
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Affiliation(s)
- Michelle F. Griffin
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
| | - Evan J. Fahy
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
| | - Megan King
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
| | - Nicholas Guardino
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
| | - Kellen Chen
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
| | - Darren B. Abbas
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
| | - Christopher V. Lavin
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
| | - Nestor M. Diaz Deleon
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
| | - H. Peter Lorenz
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
| | - Michael T. Longaker
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
- Institute for Stem Cell Biology and Regenerative Medicine; Stanford University School of Medicine, Stanford, California, USA
| | - Derrick C. Wan
- Division of Plastic and Reconstructive Surgery, Department of Surgery; Stanford, California, USA
- Institute for Stem Cell Biology and Regenerative Medicine; Stanford University School of Medicine, Stanford, California, USA
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19
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Abstract
Oral and craniofacial tissues are uniquely adapted for continuous and intricate functioning, including breathing, feeding, and communication. To achieve these vital processes, this complex is supported by incredible tissue diversity, variously composed of epithelia, vessels, cartilage, bone, teeth, ligaments, and muscles, as well as mesenchymal, adipose, and peripheral nervous tissue. Recent single cell and spatial multiomics assays-specifically, genomics, epigenomics, transcriptomics, proteomics, and metabolomics-have annotated known and new cell types and cell states in human tissues and animal models, but these concepts remain limitedly explored in the human postnatal oral and craniofacial complex. Here, we highlight the collaborative and coordinated efforts of the newly established Oral and Craniofacial Bionetwork as part of the Human Cell Atlas, which aims to leverage single cell and spatial multiomics approaches to first understand the cellular and molecular makeup of human oral and craniofacial tissues in health and to then address common and rare diseases. These powerful assays have already revealed the cell types that support oral tissues, and they will unravel cell types and molecular networks utilized across development, maintenance, and aging as well as those affected in diseases of the craniofacial complex. This level of integration and cell annotation with partner laboratories across the globe will be critical for understanding how multiple variables, such as age, sex, race, and ancestry, influence these oral and craniofacial niches. Here, we 1) highlight these recent collaborative efforts to employ new single cell and spatial approaches to resolve our collective biology at a higher resolution in health and disease, 2) discuss the vision behind the Oral and Craniofacial Bionetwork, 3) outline the stakeholders who contribute to and will benefit from this network, and 4) outline directions for creating the first Human Oral and Craniofacial Cell Atlas.
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Affiliation(s)
- A J Caetano
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London, UK
| | - I Sequeira
- Institute of Dentistry, Barts Centre for Squamous Cancer, Barts and The London School of Medicine and Dentistry, Queen Mary University London, London, UK
| | - K M Byrd
- Lab of Oral and Craniofacial Innovation, Department of Innovation and Technology Research, ADA Science and Research Institute, Gaithersburg, MD, USA
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20
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Ohmoto M, Nakamura S, Wang H, Jiang P, Hirota J, Matsumoto I. Maintenance and turnover of Sox2+ adult stem cells in the gustatory epithelium. PLoS One 2022; 17:e0267683. [PMID: 36054203 PMCID: PMC9439239 DOI: 10.1371/journal.pone.0267683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 04/14/2022] [Indexed: 11/18/2022] Open
Abstract
Continuous turnover of taste bud cells in the oral cavity underlies the homeostasis of taste tissues. Previous studies have demonstrated that Sox2+ stem cells give rise to all types of epithelial cells including taste bud cells and non-gustatory epithelial cells in the oral epithelium, and Sox2 is required for generating taste bud cells. Here, we show the dynamism of single stem cells through multicolor lineage tracing analyses in Sox2-CreERT2; Rosa26-Confetti mice. In the non-gustatory epithelium, unicolored areas populated by a cluster of cells expressing the same fluorescent protein grew over time, while epithelial cells were randomly labeled with multiple fluorescent proteins by short-term tracing. Similar phenomena were observed in gustatory epithelia. These results suggest that the Sox2+ stem cell population is maintained by balancing the increase of certain stem cells with the reduction of the others. In the gustatory epithelia, many single taste buds contained cells labeled with different fluorescent proteins, indicating that a single taste bud is composed of cells derived from multiple Sox2+ stem cells. Our results reveal the characteristics of Sox2+ stem cells underlying the turnover of taste bud cells and the homeostasis of taste tissues.
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Affiliation(s)
- Makoto Ohmoto
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, United States of America
- Department of Life Science and Technology, Graduate School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Kanagawa, Japan
- * E-mail: (MO); (IM)
| | - Shugo Nakamura
- Faculty of Information Networking for Innovation and Design (INIAD), Toyo University, Kita, Tokyo, Japan
| | - Hong Wang
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, United States of America
| | - Peihua Jiang
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, United States of America
| | - Junji Hirota
- Department of Life Science and Technology, Graduate School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Kanagawa, Japan
| | - Ichiro Matsumoto
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, United States of America
- * E-mail: (MO); (IM)
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21
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Nagata M, English JD, Ono N, Ono W. Diverse stem cells for periodontal tissue formation and regeneration. Genesis 2022; 60:e23495. [PMID: 35916433 PMCID: PMC9492631 DOI: 10.1002/dvg.23495] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 05/09/2022] [Accepted: 05/13/2022] [Indexed: 11/10/2022]
Abstract
The periodontium is comprised of multiple units of mineralized and nonmineralized tissues including the cementum on the root surface, the alveolar bone, periodontal ligament (PDL), and the gingiva. PDL contains a variety of cell populations including mesenchymal stem/progenitor cells (MSCs) termed PDLSCs, which contribute to periodontal regeneration. Recent studies utilizing mouse genetic models shed light on the identities of these mesenchymal progenitors in their native environment, particularly regarding how they contribute to homeostasis and repair of the periodontium. The current concept is that mesenchymal progenitors in the PDL are localized to the perivascular niche. Single-cell RNA sequencing (scRNA-seq) analyses reveal heterogeneity and cell-type specific markers of cells in the periodontium, as well as their developmental relationship with precursor cells in the dental follicle. The characteristics of PDLSCs and their diversity in vivo are now beginning to be unraveled thanks to insights from mouse genetic models and scRNA-seq analyses, which aid to uncover the fundamental properties of stem cells in the human PDL. The new knowledge will be highly important for developing more effective stem cell-based regenerative therapies to repair periodontal tissues in the future.
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Affiliation(s)
- Mizuki Nagata
- Department of Orthodontics, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, United States
| | - Jeryl D. English
- Department of Orthodontics, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, United States
| | - Noriaki Ono
- Department of Diagnostic & Biomedical Sciences, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, United States
| | - Wanida Ono
- Department of Orthodontics, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, United States
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22
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Wu J, Ding Y, Wang J, Lyu F, Tang Q, Song J, Luo Z, Wan Q, Lan X, Xu Z, Chen L. Single‐cell RNA
sequencing in oral science: Current awareness and perspectives. Cell Prolif 2022; 55:e13287. [PMID: 35842899 PMCID: PMC9528768 DOI: 10.1111/cpr.13287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 05/10/2022] [Accepted: 05/29/2022] [Indexed: 11/30/2022] Open
Abstract
The emergence of single‐cell RNA sequencing enables simultaneous sequencing of thousands of cells, making the analysis of cell population heterogeneity more efficient. In recent years, single‐cell RNA sequencing has been used in the investigation of heterogeneous cell populations, cellular developmental trajectories, stochastic gene transcriptional kinetics, and gene regulatory networks, providing strong support in life science research. However, the application of single‐cell RNA sequencing in the field of oral science has not been reviewed comprehensively yet. Therefore, this paper reviews the development and application of single‐cell RNA sequencing in oral science, including fields of tissue development, teeth and jaws diseases, maxillofacial tumors, infections, etc., providing reference and prospects for using single‐cell RNA sequencing in studying the oral diseases, tissue development, and regeneration.
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Affiliation(s)
- Jie Wu
- Department of Stomatology, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology Sun Yat‐sen University Guangzhou China
- School of Stomatology, Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Yumei Ding
- Department of Stomatology, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- School of Stomatology, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan China
| | - Jinyu Wang
- Department of Stomatology, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- School of Stomatology, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan China
| | - Fengyuan Lyu
- School of Stomatology, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan China
- Center of Stomatology, Tongji Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Qingming Tang
- Department of Stomatology, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- School of Stomatology, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan China
| | - Jiangyuan Song
- Department of Stomatology, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- School of Stomatology, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan China
| | - Zhiqiang Luo
- National Engineering Research Center for Nanomedicine College of Life Science and Technolog Huazhong University of Science and Technology Wuhan China
| | - Qian Wan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy Huazhong University of Science and Technology Wuhan China
- Institute of Brain Research Huazhong University of Science and Technology Wuhan China
| | - Xiaoli Lan
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- Hubei Key Laboratory of Molecular Imaging Wuhan China
| | - Zhi Xu
- Department of Stomatology, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- School of Stomatology, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan China
| | - Lili Chen
- Department of Stomatology, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- School of Stomatology, Tongji Medical College Huazhong University of Science and Technology Wuhan China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan China
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23
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Vipparthi K, Hari K, Chakraborty P, Ghosh S, Patel AK, Ghosh A, Biswas NK, Sharan R, Arun P, Jolly MK, Singh S. Emergence of hybrid states of stem-like cancer cells correlates with poor prognosis in oral cancer. iScience 2022; 25:104317. [PMID: 35602941 PMCID: PMC9114525 DOI: 10.1016/j.isci.2022.104317] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 03/14/2022] [Accepted: 04/22/2022] [Indexed: 12/26/2022] Open
Abstract
Cancer cell state transitions emerged as powerful mechanisms responsible for drug tolerance and overall poor prognosis; however, evidences were largely missing in oral cancer. Here, by multiplexing phenotypic markers of stem-like cancer cells (SLCCs); CD44, CD24 and aldehyde dehydrogenase (ALDH), we characterized diversity among multiple oral tumor tissues and cell lines. Two distinct patterns of spontaneous transitions with stochastic bidirectional interconversions on ‘ALDH-axis’, and unidirectional non-interconvertible transitions on ‘CD24-axis’ were observed. Interestingly, plastic ‘ALDH-axis’ was harnessed by cells to adapt to a Cisplatin tolerant state. Furthermore, phenotype-specific RNA sequencing suggested the possible maintenance of intermediate hybrid cell states maintaining stemness within the differentiating subpopulations. Importantly, survival analysis with subpopulation-specific gene sets strongly suggested that cell-state transitions may drive non-genetic heterogeneity, resulting in poor prognosis. Therefore, we have described the phenotypic-composition of heterogeneous subpopulations critical for global tumor behavior in oral cancer; which may provide prerequisite knowledge for treatment strategies. Demonstrated population trajectory driven non-genetic heterogeneity in oral cancer Created transition maps for subpopulations using discrete time Markov chain model Demonstrated maintenance of stemness in cells undergoing differentiation Uniquely expressed genes of these subpopulations associated with disease prognosis
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Affiliation(s)
- Kavya Vipparthi
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Kishore Hari
- Centre for BioSystems Science and Engineering, India Institute of Science, Bengaluru, Karnataka 560012, India
| | - Priyanka Chakraborty
- Centre for BioSystems Science and Engineering, India Institute of Science, Bengaluru, Karnataka 560012, India
| | - Subhashis Ghosh
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Ankit Kumar Patel
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Arnab Ghosh
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Nidhan Kumar Biswas
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
| | - Rajeev Sharan
- Head and Neck Surgery, Tata Medical Center, Kolkata, West Bengal 700160, India
| | - Pattatheyil Arun
- Head and Neck Surgery, Tata Medical Center, Kolkata, West Bengal 700160, India
| | - Mohit Kumar Jolly
- Centre for BioSystems Science and Engineering, India Institute of Science, Bengaluru, Karnataka 560012, India
| | - Sandeep Singh
- National Institute of Biomedical Genomics, Kalyani, West Bengal 741251, India
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24
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Jiang Z, Li N, Shao Q, Zhu D, Feng Y, Wang Y, Yu M, Ren L, Chen Q, Yang G. Light-controlled scaffold- and serum-free hard palatal-derived mesenchymal stem cell aggregates for bone regeneration. Bioeng Transl Med 2022; 8:e10334. [PMID: 36684075 PMCID: PMC9842060 DOI: 10.1002/btm2.10334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 04/10/2022] [Accepted: 04/18/2022] [Indexed: 01/25/2023] Open
Abstract
Cell aggregates that mimic in vivo cell-cell interactions are promising and powerful tools for tissue engineering. This study isolated a new, easily obtained, population of mesenchymal stem cells (MSCs) from rat hard palates named hard palatal-derived mesenchymal stem cells (PMSCs). The PMSCs were positive for CD90, CD44, and CD29 and negative for CD34, CD45, and CD146. They exhibited clonogenicity, self-renewal, migration, and multipotent differentiation capacities. Furthermore, this study fabricated scaffold-free 3D aggregates using light-controlled cell sheet technology and a serum-free method. PMSC aggregates were successfully constructed with good viability. Transplantation of the PMSC aggregates and the PMSC aggregate-implant complexes significantly enhanced bone formation and implant osseointegration in vivo, respectively. This new cell resource is easy to obtain and provides an alternative strategy for tissue engineering and regenerative medicine.
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Affiliation(s)
- Zhiwei Jiang
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
| | - Na Li
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
| | - Qin Shao
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
| | - Danji Zhu
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
| | - Yuting Feng
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
| | - Yang Wang
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
| | - Mengjia Yu
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
| | - Lingfei Ren
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
| | - Qianming Chen
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
| | - Guoli Yang
- Stomatology Hospital, School of StomatologyZhejiang University School of MedicineHangzhouZhejiangChina,Zhejiang Provincial Clinical Research Center for Oral DiseasesHangzhouZhejiangChina,Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhouZhejiangChina
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25
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Chan KY, Yan CCS, Roan HY, Hsu SC, Tseng TL, Hsiao CD, Hsu CP, Chen CH. Skin cells undergo asynthetic fission to expand body surfaces in zebrafish. Nature 2022; 605:119-125. [PMID: 35477758 DOI: 10.1038/s41586-022-04641-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 03/10/2022] [Indexed: 12/24/2022]
Abstract
As an animal's surface area expands during development, skin cell populations must quickly respond to maintain sufficient epithelial coverage. Despite much progress in understanding of skin cell behaviours in vivo1,2, it remains unclear how cells collectively act to satisfy coverage demands at an organismic level. Here we created a multicolour cell membrane tagging system, palmskin, to monitor the entire population of superficial epithelial cells (SECs) in developing zebrafish larvae. Using time-lapse imaging, we found that many SECs readily divide on the animal body surface; during a specific developmental window, a single SEC can produce a maximum of four progeny cells over its lifetime on the surface of the animal. Remarkably, EdU assays, DNA staining and hydroxyurea treatment showed that these terminally differentiated skin cells continue splitting despite an absence of DNA replication, causing up to 50% of SECs to exhibit reduced genome size. On the basis of a simple mathematical model and quantitative analyses of cell volumes and apical surface areas, we propose that 'asynthetic fission' is used as an efficient mechanism for expanding epithelial coverage during rapid growth. Furthermore, global or local manipulation of body surface growth affects the extent and mode of SEC division, presumably through tension-mediated activation of stretch-activated ion channels. We speculate that this frugal yet flexible mode of cell proliferation might also occur in contexts other than zebrafish skin expansion.
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Affiliation(s)
- Keat Ying Chan
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan.,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung, Taiwan
| | | | - Hsiao-Yuh Roan
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Shao-Chun Hsu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Tzu-Lun Tseng
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Chung-Der Hsiao
- Department of Bioscience Technology, Chung Yuan Christian University, Chung-Li, Taiwan
| | - Chao-Ping Hsu
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan.,Genome and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei, Taiwan.,Division of Physics, National Center for Theoretical Sciences, Taipei, Taiwan
| | - Chen-Hui Chen
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan.
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26
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Single cell transcriptomic analysis reveals cellular diversity of murine esophageal epithelium. Nat Commun 2022; 13:2167. [PMID: 35443762 PMCID: PMC9021266 DOI: 10.1038/s41467-022-29747-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/30/2022] [Indexed: 12/09/2022] Open
Abstract
Although morphologic progression coupled with expression of specific molecular markers has been characterized along the esophageal squamous differentiation gradient, the molecular heterogeneity within cell types along this trajectory has yet to be classified at the single cell level. To address this knowledge gap, we perform single cell RNA-sequencing of 44,679 murine esophageal epithelial, to identify 11 distinct cell populations as well as pathways alterations along the basal-superficial axis and in each individual population. We evaluate the impact of aging upon esophageal epithelial cell populations and demonstrate age-associated mitochondrial dysfunction. We compare single cell transcriptomic profiles in 3D murine organoids and human esophageal biopsies with that of murine esophageal epithelium. Finally, we employ pseudotemporal trajectory analysis to develop a working model of cell fate determination in murine esophageal epithelium. These studies provide comprehensive molecular perspective on the cellular heterogeneity of murine esophageal epithelium in the context of homeostasis and aging. The level of cellular diversity in the esophageal epithelium has yet to be classified at the single cell level. Here the authors analyze the transcriptome of 44,679 murine esophageal keratinocytes to identify an unexpected level of cellular heterogeneity.
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27
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Fowler JC, Jones PH. Somatic mutation: What shapes the mutational landscape of normal epithelia? Cancer Discov 2022; 12:1642-1655. [PMID: 35397477 DOI: 10.1158/2159-8290.cd-22-0145] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/11/2022] [Accepted: 04/01/2022] [Indexed: 11/16/2022]
Abstract
Epithelial stem cells accumulate mutations throughout life. Some of these mutants increase competitive fitness and may form clones that colonize the stem cell niche and persist to acquire further genome alterations. After a transient expansion, mutant stem cells must revert to homeostatic behavior so normal tissue architecture is maintained. Some positively selected mutants may promote cancer development while others inhibit carcinogenesis. Factors that shape the mutational landscape include wild type and mutant stem cell dynamics, competition for the niche, and environmental exposures. Understanding these processes may give new insight into the basis of cancer risk and opportunities for cancer prevention.
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28
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Cockburn K, Annusver K, Gonzalez DG, Ganesan S, May DP, Mesa KR, Kawaguchi K, Kasper M, Greco V. Gradual differentiation uncoupled from cell cycle exit generates heterogeneity in the epidermal stem cell layer. Nat Cell Biol 2022; 24:1692-1700. [PMID: 36357619 PMCID: PMC9729105 DOI: 10.1038/s41556-022-01021-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 09/23/2022] [Indexed: 11/12/2022]
Abstract
Highly regenerative tissues continuously produce terminally differentiated cells to replace those that are lost. How they orchestrate the complex transition from undifferentiated stem cells towards post-mitotic, molecularly distinct and often spatially segregated differentiated populations is not well understood. In the adult skin epidermis, the stem cell compartment contains molecularly heterogeneous subpopulations1-4 whose relationship to the complete trajectory of differentiation remains unknown. Here we show that differentiation, from commitment to exit from the stem cell layer, is a multi-day process wherein cells transit through a continuum of transcriptional changes with upregulation of differentiation genes preceding downregulation of typical stemness genes. Differentiation-committed cells remain capable of dividing to produce daughter cells fated to further differentiate, demonstrating that differentiation is uncoupled from cell cycle exit. These cell divisions are not required as part of an obligate transit-amplifying programme but help to buffer the differentiating cell pool during heightened demand. Thus, instead of distinct contributions from multiple progenitors, a continuous gradual differentiation process fuels homeostatic epidermal turnover.
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Affiliation(s)
- Katie Cockburn
- grid.47100.320000000419368710Department of Genetics, Yale School of Medicine, New Haven, CT USA ,grid.14709.3b0000 0004 1936 8649Present Address: Department of Biochemistry and Rosalind & Morris Goodman Cancer Institute, McGill University, Montreal, Quebec Canada
| | - Karl Annusver
- grid.4714.60000 0004 1937 0626Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - David G. Gonzalez
- grid.47100.320000000419368710Department of Genetics, Yale School of Medicine, New Haven, CT USA
| | - Smirthy Ganesan
- grid.47100.320000000419368710Department of Genetics, Yale School of Medicine, New Haven, CT USA
| | - Dennis P. May
- grid.47100.320000000419368710Department of Genetics, Yale School of Medicine, New Haven, CT USA
| | - Kailin R. Mesa
- grid.47100.320000000419368710Department of Genetics, Yale School of Medicine, New Haven, CT USA
| | - Kyogo Kawaguchi
- grid.508743.dNonequilibrium Physics of Living Matter RIKEN Habuki Research Team, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan ,grid.7597.c0000000094465255RIKEN Cluster for Pioneering Research, Kobe, Japan ,grid.26999.3d0000 0001 2151 536XUniversal Biology Institute, The University of Tokyo, Tokyo, Japan
| | - Maria Kasper
- grid.4714.60000 0004 1937 0626Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Valentina Greco
- grid.47100.320000000419368710Department of Genetics, Yale School of Medicine, New Haven, CT USA ,grid.47100.320000000419368710Departments of Cell Biology and Dermatology, Yale Stem Cell Center, Yale Cancer Center, Yale School of Medicine, New Haven, CT USA
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29
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Nagata M, Chu AKY, Ono N, Welch JD, Ono W. Single-Cell Transcriptomic Analysis Reveals Developmental Relationships and Specific Markers of Mouse Periodontium Cellular Subsets. FRONTIERS IN DENTAL MEDICINE 2021; 2. [PMID: 34966906 PMCID: PMC8713353 DOI: 10.3389/fdmed.2021.679937] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The periodontium is essential for supporting the functionality of the tooth, composed of diversity of mineralized and non-mineralized tissues such as the cementum, the periodontal ligament (PDL) and the alveolar bone. The periodontium is developmentally derived from the dental follicle (DF), a fibrous tissue surrounding the developing tooth bud. We previously showed through in vivo lineage-tracing experiments that DF contains mesenchymal progenitor cells expressing parathyroid hormone-related protein (PTHrP), which give rise to cells forming the periodontal attachment apparatus in a manner regulated by autocrine signaling through the PTH/PTHrP receptor. However, the developmental relationships between PTHrP+ DF cells and diverse cell populations constituting the periodontium remain undefined. Here, we performed single-cell RNA-sequencing (scRNA-seq) analyses of cells in the periodontium by integrating the two datasets, i.e. PTHrP-mCherry+ DF cells at P6 and 2.3kb Col1a1 promoter-driven GFP+ periodontal cells at P25 that include descendants of PTHrP+ DF cells, cementoblasts, osteoblasts and periodontal ligament cells. This integrative scRNA-seq analysis revealed heterogeneity of cells of the periodontium and their cell type-specific markers, as well as their relationships with DF cells. Most importantly, our analysis identified a cementoblast-specific metagene that discriminate cementoblasts from alveolar bone osteoblasts, including Pthlh (encoding PTHrP) and Tubb3. RNA velocity analysis indicated that cementoblasts were directly derived from PTHrP+ DF cells in the early developmental stage and did not interconvert with other cell types. Further, CellPhoneDB cell-cell communication analysis indicated that PTHrP derived from cementoblasts acts on diversity of cells in the periodontium in an autocrine and paracrine manner. Collectively, our findings provide insights into the lineage hierarchy and intercellular interactions of cells in the periodontium at a single-cell level, aiding to understand cellular and molecular basis of periodontal tissue formation.
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Affiliation(s)
- Mizuki Nagata
- Department of Orthodontics, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, United States
| | - Angel Ka Yan Chu
- Department of Computational Medicine and Bioinformatics, Department of Computer Science and Engineering, University of Michigan, Ann Arbor, MI, United States
| | - Noriaki Ono
- Department of Diagnostic & Biomedical Sciences, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, United States
| | - Joshua D Welch
- Department of Computational Medicine and Bioinformatics, Department of Computer Science and Engineering, University of Michigan, Ann Arbor, MI, United States
| | - Wanida Ono
- Department of Orthodontics, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, United States
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30
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The Balance between Differentiation and Terminal Differentiation Maintains Oral Epithelial Homeostasis. Cancers (Basel) 2021; 13:cancers13205123. [PMID: 34680271 PMCID: PMC8534139 DOI: 10.3390/cancers13205123] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 12/26/2022] Open
Abstract
Simple Summary Oral cancer affecting the oral cavity represents the most common cancer of the head and neck region. Oral cancer develops in a multistep process in which normal cells gradually accumulate genetic and epigenetic modifications to evolve into a malignant disease. Mortality for oral cancer patients is high and morbidity has a significant long-term impact on the health and wellbeing of affected individuals, typically resulting in facial disfigurement and a loss of the ability to speak, chew, taste, and swallow. The limited scope to which current treatments are able to control oral cancer underlines the need for novel therapeutic strategies. This review highlights the molecular differences between oral cell proliferation, differentiation and terminal differentiation, defines terminal differentiation as an important tumour suppressive mechanism and establishes a rationale for clinical investigation of differentiation-paired therapies that may improve outcomes in oral cancer. Abstract The oral epithelium is one of the fastest repairing and continuously renewing tissues. Stem cell activation within the basal layer of the oral epithelium fuels the rapid proliferation of multipotent progenitors. Stem cells first undergo asymmetric cell division that requires tightly controlled and orchestrated differentiation networks to maintain the pool of stem cells while producing progenitors fated for differentiation. Rapidly expanding progenitors subsequently commit to advanced differentiation programs towards terminal differentiation, a process that regulates the structural integrity and homeostasis of the oral epithelium. Therefore, the balance between differentiation and terminal differentiation of stem cells and their progeny ensures progenitors commitment to terminal differentiation and prevents epithelial transformation and oral squamous cell carcinoma (OSCC). A recent comprehensive molecular characterization of OSCC revealed that a disruption of terminal differentiation factors is indeed a common OSCC event and is superior to oncogenic activation. Here, we discuss the role of differentiation and terminal differentiation in maintaining oral epithelial homeostasis and define terminal differentiation as a critical tumour suppressive mechanism. We further highlight factors with crucial terminal differentiation functions and detail the underlying consequences of their loss. Switching on terminal differentiation in differentiated progenitors is likely to represent an extremely promising novel avenue that may improve therapeutic interventions against OSCC.
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31
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Pereira D, Sequeira I. A Scarless Healing Tale: Comparing Homeostasis and Wound Healing of Oral Mucosa With Skin and Oesophagus. Front Cell Dev Biol 2021; 9:682143. [PMID: 34381771 PMCID: PMC8350526 DOI: 10.3389/fcell.2021.682143] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 06/24/2021] [Indexed: 12/14/2022] Open
Abstract
Epithelial tissues are the most rapidly dividing tissues in the body, holding a natural ability for renewal and regeneration. This ability is crucial for survival as epithelia are essential to provide the ultimate barrier against the external environment, protecting the underlying tissues. Tissue stem and progenitor cells are responsible for self-renewal and repair during homeostasis and following injury. Upon wounding, epithelial tissues undergo different phases of haemostasis, inflammation, proliferation and remodelling, often resulting in fibrosis and scarring. In this review, we explore the phenotypic differences between the skin, the oesophagus and the oral mucosa. We discuss the plasticity of these epithelial stem cells and contribution of different fibroblast subpopulations for tissue regeneration and wound healing. While these epithelial tissues share global mechanisms of stem cell behaviour for tissue renewal and regeneration, the oral mucosa is known for its outstanding healing potential with minimal scarring. We aim to provide an updated review of recent studies that combined cell therapy with bioengineering exporting the unique scarless properties of the oral mucosa to improve skin and oesophageal wound healing and to reduce fibrotic tissue formation. These advances open new avenues toward the ultimate goal of achieving scarless wound healing.
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Affiliation(s)
| | - Inês Sequeira
- Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
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32
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Altshuler A, Amitai-Lange A, Tarazi N, Dey S, Strinkovsky L, Hadad-Porat S, Bhattacharya S, Nasser W, Imeri J, Ben-David G, Abboud-Jarrous G, Tiosano B, Berkowitz E, Karin N, Savir Y, Shalom-Feuerstein R. Discrete limbal epithelial stem cell populations mediate corneal homeostasis and wound healing. Cell Stem Cell 2021; 28:1248-1261.e8. [PMID: 33984282 PMCID: PMC8254798 DOI: 10.1016/j.stem.2021.04.003] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 12/21/2020] [Accepted: 04/01/2021] [Indexed: 02/06/2023]
Abstract
The accessibility and transparency of the cornea permit robust stem cell labeling and in vivo cell fate mapping. Limbal epithelial stem cells (LSCs) that renew the cornea are traditionally viewed as rare, slow-cycling cells that follow deterministic rules dictating their self-renewal or differentiation. Here, we combined single-cell RNA sequencing and advanced quantitative lineage tracing for in-depth analysis of the murine limbal epithelium. These analysis revealed the co-existence of two LSC populations localized in separate and well-defined sub-compartments, termed the "outer" and "inner" limbus. The primitive population of quiescent outer LSCs participates in wound healing and boundary formation, and these cells are regulated by T cells, which serve as a niche. In contrast, the inner peri-corneal limbus hosts active LSCs that maintain corneal epithelial homeostasis. Quantitative analyses suggest that LSC populations are abundant, following stochastic rules and neutral drift dynamics. Together these results demonstrate that discrete LSC populations mediate corneal homeostasis and regeneration.
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Affiliation(s)
- Anna Altshuler
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel
| | - Aya Amitai-Lange
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel
| | - Noam Tarazi
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel
| | - Sunanda Dey
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel
| | - Lior Strinkovsky
- Department of Physiology, Biophysics & Systems Biology, The Rappaport Faculty of Medicine & Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
| | - Shira Hadad-Porat
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel
| | - Swarnabh Bhattacharya
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel
| | - Waseem Nasser
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel
| | - Jusuf Imeri
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel
| | - Gil Ben-David
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel
| | - Ghada Abboud-Jarrous
- Department of Immunology, The Rappaport Faculty of Medicine & Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
| | - Beatrice Tiosano
- Department of Ophthalmology, Hillel Yaffe Medical Center, Hadera, Israel
| | - Eran Berkowitz
- Department of Ophthalmology, Hillel Yaffe Medical Center, Hadera, Israel
| | - Nathan Karin
- Department of Immunology, The Rappaport Faculty of Medicine & Research Institute, Technion - Israel Institute of Technology, Haifa, Israel
| | - Yonatan Savir
- Department of Physiology, Biophysics & Systems Biology, The Rappaport Faculty of Medicine & Research Institute, Technion - Israel Institute of Technology, Haifa, Israel.
| | - Ruby Shalom-Feuerstein
- Department of Genetics & Developmental Biology, The Rappaport Faculty of Medicine & Research Institute, Technion Integrated Cancer Center, Technion - Israel Institute of Technology, Haifa, Israel.
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33
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Cycling Stem Cells Are Radioresistant and Regenerate the Intestine. Cell Rep 2021; 32:107952. [PMID: 32726617 PMCID: PMC7789978 DOI: 10.1016/j.celrep.2020.107952] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 01/09/2020] [Accepted: 07/02/2020] [Indexed: 01/17/2023] Open
Abstract
A certain number of epithelial cells in intestinal crypts are DNA damage resistant and contribute to regeneration. However, the cellular mechanism underlying intestinal regeneration remains unclear. Using lineage tracing, we show that cells marked by an Msi1 reporter (Msi1+) are right above Lgr5high cells in intestinal crypts and exhibit DNA damage resistance. Single-cell RNA sequencing reveals that the Msi1+ cells are heterogeneous with the majority being intestinal stem cells (ISCs). The DNA damage-resistant subpopulation of Msi1+ cells is characterized by low-to-negative Lgr5 expression and is more rapidly cycling than Lgr5high radiosensitive crypt base columnar stem cells (CBCs). This enables an efficient repopulation of the intestinal epithelium at early stage when Lgr5high cells are not emerging. Furthermore, relative to CBCs, Msi1+ cells preferentially produce Paneth cells during homeostasis and upon radiation repair. Together, we demonstrate that the DNA damage-resistant Msi1+ cells are cycling ISCs that maintain and regenerate the intestinal epithelium. Quiescent reserve stem cells in the intestine are thought to activate following irradiation to restore the depleted Lgr5high CBCs. Now, Sheng et al. demonstrate that cycling Msi1+ cells represent DNA damage-resistant ISCs that support efficient repopulation of the intestinal epithelium at the early stage of post-radiation repair, ahead of Lgr5high CBCs.
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34
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Huang N, Pérez P, Kato T, Mikami Y, Okuda K, Gilmore RC, Conde CD, Gasmi B, Stein S, Beach M, Pelayo E, Maldonado JO, Lafont BA, Jang SI, Nasir N, Padilla RJ, Murrah VA, Maile R, Lovell W, Wallet SM, Bowman NM, Meinig SL, Wolfgang MC, Choudhury SN, Novotny M, Aevermann BD, Scheuermann RH, Cannon G, Anderson CW, Lee RE, Marchesan JT, Bush M, Freire M, Kimple AJ, Herr DL, Rabin J, Grazioli A, Das S, French BN, Pranzatelli T, Chiorini JA, Kleiner DE, Pittaluga S, Hewitt SM, Burbelo PD, Chertow D, Frank K, Lee J, Boucher RC, Teichmann SA, Warner BM, Byrd KM. SARS-CoV-2 infection of the oral cavity and saliva. Nat Med 2021; 27:892-903. [PMID: 33767405 PMCID: PMC8240394 DOI: 10.1038/s41591-021-01296-8] [Citation(s) in RCA: 428] [Impact Index Per Article: 142.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 02/26/2021] [Indexed: 02/01/2023]
Abstract
Despite signs of infection-including taste loss, dry mouth and mucosal lesions such as ulcerations, enanthema and macules-the involvement of the oral cavity in coronavirus disease 2019 (COVID-19) is poorly understood. To address this, we generated and analyzed two single-cell RNA sequencing datasets of the human minor salivary glands and gingiva (9 samples, 13,824 cells), identifying 50 cell clusters. Using integrated cell normalization and annotation, we classified 34 unique cell subpopulations between glands and gingiva. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) viral entry factors such as ACE2 and TMPRSS members were broadly enriched in epithelial cells of the glands and oral mucosae. Using orthogonal RNA and protein expression assessments, we confirmed SARS-CoV-2 infection in the glands and mucosae. Saliva from SARS-CoV-2-infected individuals harbored epithelial cells exhibiting ACE2 and TMPRSS expression and sustained SARS-CoV-2 infection. Acellular and cellular salivary fractions from asymptomatic individuals were found to transmit SARS-CoV-2 ex vivo. Matched nasopharyngeal and saliva samples displayed distinct viral shedding dynamics, and salivary viral burden correlated with COVID-19 symptoms, including taste loss. Upon recovery, this asymptomatic cohort exhibited sustained salivary IgG antibodies against SARS-CoV-2. Collectively, these data show that the oral cavity is an important site for SARS-CoV-2 infection and implicate saliva as a potential route of SARS-CoV-2 transmission.
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Affiliation(s)
- Ni Huang
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK,These authors contributed equally: Ni Huang, Paola Perez, Takafumi Kato, Yu Mikami
| | - Paola Pérez
- Salivary Disorders Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA,These authors contributed equally: Ni Huang, Paola Perez, Takafumi Kato, Yu Mikami
| | - Takafumi Kato
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA,These authors contributed equally: Ni Huang, Paola Perez, Takafumi Kato, Yu Mikami
| | - Yu Mikami
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA,These authors contributed equally: Ni Huang, Paola Perez, Takafumi Kato, Yu Mikami
| | - Kenichi Okuda
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Rodney C. Gilmore
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | - Billel Gasmi
- Salivary Disorders Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA,Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Sydney Stein
- Emerging Pathogens Section, Department of Critical Care Medicine, NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Margaret Beach
- Salivary Disorders Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Eileen Pelayo
- Salivary Disorders Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Jose O. Maldonado
- Salivary Disorders Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA,AAV Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Bernard A. Lafont
- SARS-CoV-2 Virology Core, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Shyh-Ing Jang
- Salivary Disorders Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Nadia Nasir
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Ricardo J. Padilla
- Division of Diagnostic Sciences, University of North Carolina Adams School of Dentistry, Chapel Hill, NC, USA
| | - Valerie A. Murrah
- Division of Diagnostic Sciences, University of North Carolina Adams School of Dentistry, Chapel Hill, NC, USA
| | - Robert Maile
- Department of Microbiology & Immunology, University of North Carolina School of Medicine, Chapel Hill, NC, USA,Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - William Lovell
- Division of Oral & Craniofacial Health Sciences, University of North Carolina Adams School of Dentistry, Chapel Hill, NC, USA
| | - Shannon M. Wallet
- Department of Microbiology & Immunology, University of North Carolina School of Medicine, Chapel Hill, NC, USA,Division of Oral & Craniofacial Health Sciences, University of North Carolina Adams School of Dentistry, Chapel Hill, NC, USA
| | - Natalie M. Bowman
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Suzanne L. Meinig
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Matthew C. Wolfgang
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA,Department of Microbiology & Immunology, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Saibyasachi N. Choudhury
- Department of Genomic Medicine and Infectious Disease, J. Craig Venter Institute, La Jolla, CA, USA
| | - Mark Novotny
- Department of Infectious Disease, J. Craig Venter Institute, La Jolla, CA, USA
| | - Brian D. Aevermann
- Department of Infectious Disease, J. Craig Venter Institute, La Jolla, CA, USA
| | - Richard H. Scheuermann
- Department of Informatics, J. Craig Venter Institute, La Jolla, CA, USA,Department of Pathology, University of California San Diego, La Jolla, CA, USA
| | - Gabrielle Cannon
- The Advanced Analytics Core, Center for Gastrointestinal Biology and Disease, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Carlton W. Anderson
- The Advanced Analytics Core, Center for Gastrointestinal Biology and Disease, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Rhianna E. Lee
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA,Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Julie T. Marchesan
- Division of Comprehensive Oral Health, University of North Carolina Adams School of Dentistry, Chapel Hill, NC, USA
| | - Mandy Bush
- Division of Comprehensive Oral Health, University of North Carolina Adams School of Dentistry, Chapel Hill, NC, USA
| | - Marcelo Freire
- Department of Genomic Medicine and Infectious Disease, J. Craig Venter Institute, La Jolla, CA, USA,Department of Infectious Disease, J. Craig Venter Institute, La Jolla, CA, USA
| | - Adam J. Kimple
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA,Department of Otolaryngology-Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Daniel L. Herr
- Department of Shock Trauma Critical Care, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Joseph Rabin
- Department of Surgery, R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Alison Grazioli
- Kidney Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Sanchita Das
- Division of Microbiology, Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Benjamin N. French
- AAV Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Thomas Pranzatelli
- AAV Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - John A. Chiorini
- AAV Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - David E. Kleiner
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Stefania Pittaluga
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Stephen M. Hewitt
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Peter D. Burbelo
- AAV Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Daniel Chertow
- Emerging Pathogens Section, Department of Critical Care Medicine, NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | | | | | - Karen Frank
- Division of Microbiology, Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Janice Lee
- Craniofacial Anomalies & Regeneration Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Richard C. Boucher
- Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Sarah A. Teichmann
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK,Department of Physics, Cavendish Laboratory, Cambridge, UK
| | - Blake M. Warner
- Salivary Disorders Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA,These authors jointly supervised this work: Blake M. Warner, Kevin M. Byrd,Correspondence and requests for materials should be addressed to B.M.W. or K.M.B. ;
| | - Kevin M. Byrd
- Division of Oral & Craniofacial Health Sciences, University of North Carolina Adams School of Dentistry, Chapel Hill, NC, USA,Department of Innovation & Technology Research, ADA Science & Research Institute, Gaithersburg, MD, USA,These authors jointly supervised this work: Blake M. Warner, Kevin M. Byrd,Correspondence and requests for materials should be addressed to B.M.W. or K.M.B. ;
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35
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Caetano AJ, Yianni V, Volponi A, Booth V, D'Agostino EM, Sharpe P. Defining human mesenchymal and epithelial heterogeneity in response to oral inflammatory disease. eLife 2021; 10:62810. [PMID: 33393902 PMCID: PMC7781605 DOI: 10.7554/elife.62810] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 12/19/2020] [Indexed: 12/12/2022] Open
Abstract
Human oral soft tissues provide the first barrier of defence against chronic inflammatory disease and hold a remarkable scarless wounding phenotype. Tissue homeostasis requires coordinated actions of epithelial, mesenchymal, and immune cells. However, the extent of heterogeneity within the human oral mucosa and how tissue cell types are affected during the course of disease progression is unknown. Using single-cell transcriptome profiling we reveal a striking remodelling of the epithelial and mesenchymal niches with a decrease in functional populations that are linked to the aetiology of the disease. Analysis of ligand–receptor interaction pairs identify potential intercellular hubs driving the inflammatory component of the disease. Our work establishes a reference map of the human oral mucosa in health and disease, and a framework for the development of new therapeutic strategies.
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Affiliation(s)
- Ana J Caetano
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, London, United Kingdom
| | - Val Yianni
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, London, United Kingdom
| | - Ana Volponi
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, London, United Kingdom
| | - Veronica Booth
- Department of Periodontology, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, London, United Kingdom
| | - Eleanor M D'Agostino
- Unilever R&D, Colworth Science Park, Sharnbrook, Bedfordshire, Bedford, United Kingdom
| | - Paul Sharpe
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, London, United Kingdom
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36
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Stem Cells an Overview. Stem Cells 2021. [DOI: 10.1007/978-981-16-1638-9_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Chowdhury S, Ghosh S. Sources, Isolation and culture of stem cells? Stem Cells 2021. [DOI: 10.1007/978-981-16-1638-9_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Ishii R, Yanagisawa H, Sada A. Defining compartmentalized stem cell populations with distinct cell division dynamics in the ocular surface epithelium. Development 2020; 147:dev197590. [PMID: 33199446 PMCID: PMC7758628 DOI: 10.1242/dev.197590] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 11/04/2020] [Indexed: 12/11/2022]
Abstract
Adult tissues contain label-retaining cells (LRCs), which are relatively slow-cycling and considered to represent a property of tissue stem cells (SCs). In the ocular surface epithelium, LRCs are present in the limbus and conjunctival fornix; however, the character of these LRCs remains unclear, owing to lack of appropriate molecular markers. Using three CreER transgenic mouse lines, we demonstrate that the ocular surface epithelium accommodates spatially distinct populations with different cell division dynamics. In the limbus, long-lived Slc1a3CreER-labeled SCs either migrate centripetally toward the central cornea or slowly expand their clones laterally within the limbal region. In the central cornea, non-LRCs labeled with Dlx1CreER and K14CreER behave as short-lived progenitor cells. The conjunctival epithelium in the bulbar, fornix and palpebral compartment is regenerated by regionally unique SC populations. Severe damage to the cornea leads to the cancellation of SC compartments and conjunctivalization, whereas milder limbal injury induces a rapid increase of laterally expanding clones in the limbus. Taken together, our work defines compartmentalized multiple SC/progenitor populations of the mouse eye in homeostasis and their behavioral changes in response to injury.
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Affiliation(s)
- Ryutaro Ishii
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba 305-8577, Japan
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Hiromi Yanagisawa
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba 305-8577, Japan
- Faculty of Medicine, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Aiko Sada
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba 305-8577, Japan
- International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto 860-0811, Japan
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39
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Huang N, Perez P, Kato T, Mikami Y, Okuda K, Gilmore RC, Domínguez Conde C, Gasmi B, Stein S, Beach M, Pelayo E, Maldonado J, LaFont B, Padilla R, Murrah V, Maile R, Lovell W, Wallet S, Bowman NM, Meinig SL, Wolfgang MC, Choudhury SN, Novotny M, Aevermann BD, Scheuermann R, Cannon G, Anderson C, Marchesan J, Bush M, Freire M, Kimple A, Herr DL, Rabin J, Grazioli A, French BN, Pranzatelli T, Chiorini JA, Kleiner DE, Pittaluga S, Hewitt S, Burbelo PD, Chertow D, Frank K, Lee J, Boucher RC, Teichmann SA, Warner BM, Byrd KM. Integrated Single-Cell Atlases Reveal an Oral SARS-CoV-2 Infection and Transmission Axis. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2020. [PMID: 33140061 DOI: 10.1101/2020.10.26.20219089] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Despite signs of infection, the involvement of the oral cavity in COVID-19 is poorly understood. To address this, single-cell RNA sequencing data-sets were integrated from human minor salivary glands and gingiva to identify 11 epithelial, 7 mesenchymal, and 15 immune cell clusters. Analysis of SARS-CoV-2 viral entry factor expression showed enrichment in epithelia including the ducts and acini of the salivary glands and the suprabasal cells of the mucosae. COVID-19 autopsy tissues confirmed in vivo SARS-CoV-2 infection in the salivary glands and mucosa. Saliva from SARS-CoV-2-infected individuals harbored epithelial cells exhibiting ACE2 expression and SARS-CoV-2 RNA. Matched nasopharyngeal and saliva samples found distinct viral shedding dynamics and viral burden in saliva correlated with COVID-19 symptoms including taste loss. Upon recovery, this cohort exhibited salivary antibodies against SARS-CoV-2 proteins. Collectively, the oral cavity represents a robust site for COVID-19 infection and implicates saliva in viral transmission.
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40
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Byrd KM, Piehl NC, Patel JH, Huh WJ, Sequeira I, Lough KJ, Wagner BL, Marangoni P, Watt FM, Klein OD, Coffey RJ, Williams SE. Heterogeneity within Stratified Epithelial Stem Cell Populations Maintains the Oral Mucosa in Response to Physiological Stress. Cell Stem Cell 2020; 25:814-829.e6. [PMID: 31809739 DOI: 10.1016/j.stem.2019.11.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 09/12/2019] [Accepted: 11/13/2019] [Indexed: 12/22/2022]
Abstract
Stem cells in stratified epithelia are generally believed to adhere to a non-hierarchical single-progenitor model. Using lineage tracing and genetic label-retention assays, we show that the hard palatal epithelium of the oral cavity is unique in displaying marked proliferative heterogeneity. We identify a previously uncharacterized, infrequently-dividing stem cell population that resides within a candidate niche, the junctional zone (JZ). JZ stem cells tend to self-renew by planar symmetric divisions, respond to masticatory stresses, and promote wound healing, whereas frequently-dividing cells reside outside the JZ, preferentially renew through perpendicular asymmetric divisions, and are less responsive to injury. LRIG1 is enriched in the infrequently-dividing population in homeostasis, dynamically changes expression in response to tissue stresses, and promotes quiescence, whereas Igfbp5 preferentially labels a rapidly-growing, differentiation-prone population. These studies establish the oral mucosa as an important model system to study epithelial stem cell populations and how they respond to tissue stresses.
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Affiliation(s)
- Kevin M Byrd
- Department of Pathology & Laboratory Medicine, the University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA; Division of Oral & Craniofacial Health Sciences, the University of North Carolina Adams School of Dentistry, Chapel Hill, NC 27599, USA
| | - Natalie C Piehl
- Department of Pathology & Laboratory Medicine, the University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Jeet H Patel
- Department of Pathology & Laboratory Medicine, the University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Won Jae Huh
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Inês Sequeira
- Centre for Stem Cells & Regenerative Medicine, King's College London, London E1 9RT, UK
| | - Kendall J Lough
- Department of Pathology & Laboratory Medicine, the University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Bethany L Wagner
- Department of Pathology & Laboratory Medicine, the University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Pauline Marangoni
- Department of Pediatrics and Institute for Human Genetics, Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Fiona M Watt
- Centre for Stem Cells & Regenerative Medicine, King's College London, London E1 9RT, UK
| | - Ophir D Klein
- Department of Pediatrics and Institute for Human Genetics, Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Robert J Coffey
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37235, USA; Department of Veterans Affairs Medical Center, Nashville, Vanderbilt University, TN 37212, USA
| | - Scott E Williams
- Department of Pathology & Laboratory Medicine, the University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, the University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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41
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Bar C, Cohen I, Zhao D, Pothula V, Litskevitch A, Koseki H, Zheng D, Ezhkova E. Polycomb Repressive Complex 1 Controls Maintenance of Fungiform Papillae by Repressing Sonic Hedgehog Expression. Cell Rep 2020; 28:257-266.e5. [PMID: 31269445 PMCID: PMC6921245 DOI: 10.1016/j.celrep.2019.06.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 04/22/2019] [Accepted: 06/03/2019] [Indexed: 12/28/2022] Open
Abstract
How tissue patterns are formed and maintained are fundamental questions. The murine tongue epithelium, a paradigm for tissue patterning, consists of an array of specialized fungiform papillae structures that harbor taste cells. The formation of fungiform papillae is preceded by pronounced spatial changes in gene expression, in which taste cell genes such as Shh, initially diffused in lingual epithelial progenitors, become restricted to taste cells when their specification progresses. However, the requirement of spatial restriction of taste cell gene expression for patterning and formation of fungiform papillae is unknown. Here, we show that a chromatin regulator, Polycomb repressive complex (PRC) 1, is required for proper maintenance of fungiform papillae by repressing Shh and preventing ectopic SHH signaling in non-taste cells. Ablation of SHH signaling in PRC1-null non-taste cells rescues the maintenance of taste cells. Altogether, our studies exemplify how epigenetic regulation establishes spatial gene expression patterns necessary for specialized niche structures. Formation and maintenance of patterns are critical for tissue development. Bar et al. show that PRC1, an epigenetic regulator, is critical for lingual papillae development. Specifically, PRC1 regulates maintenance of the developing fungiform papillae, harboring taste cells, by repressing Shh expression in the non-gustatory epithelium surrounding taste cells.
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Affiliation(s)
- Carmit Bar
- Black Family Stem Cell Institute, The Tisch Cancer Institute, Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, New York, NY 10029, USA
| | - Idan Cohen
- Black Family Stem Cell Institute, The Tisch Cancer Institute, Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, New York, NY 10029, USA
| | - Dejian Zhao
- Department of Genetics, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA
| | - Venu Pothula
- Black Family Stem Cell Institute, The Tisch Cancer Institute, Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, New York, NY 10029, USA
| | - Anna Litskevitch
- Department of Molecular & Cell Biology, University of California, Berkeley, 142 Life Sciences Addition, Berkeley, CA 94720, USA
| | - Haruhiko Koseki
- Laboratory for Developmental Genetics, RIKEN Center for Integrative Medical Sciences (RIKEN-IMS), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan; AMED-CREST, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Deyou Zheng
- Department of Genetics, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA; Department of Neurology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA; Department of Neuroscience, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA
| | - Elena Ezhkova
- Black Family Stem Cell Institute, The Tisch Cancer Institute, Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, New York, NY 10029, USA.
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42
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Abstract
The mechanisms that regulate the balance between stem cell duplication and differentiation in adult tissues remain in debate. Using a combination of genetic lineage tracing and marker-based assays, the quantitative statistical analysis of clone size and cell composition has provided insights into the patterns of stem cell fate across a variety of tissue types and organisms. These studies have emphasized the role of niche factors and environmental cues in promoting stem cell competence, fate priming, and stochastic renewal programs. At the same time, evidence for injury-induced "cellular reprogramming" has revealed the remarkable flexibility of cell states, allowing progenitors to reacquire self-renewal potential during regeneration. Together, these findings have questioned the nature of stem cell identity and function. Here, focusing on a range of canonical tissue types, we review how quantitative modeling-based approaches have uncovered conserved patterns of stem cell fate and provided new insights into the mechanisms that regulate self-renewal.
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Affiliation(s)
- Lemonia Chatzeli
- Wellcome Trust/CRUK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, United Kingdom
- Wellcome Trust/MRC Stem Cell Institute, University of Cambridge, Cambridge CB2 1QR, United Kingdom
| | - Benjamin D Simons
- Wellcome Trust/CRUK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, United Kingdom
- Wellcome Trust/MRC Stem Cell Institute, University of Cambridge, Cambridge CB2 1QR, United Kingdom
- Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Cambridge CB3 0WA, United Kingdom
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43
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McKinley KL, Castillo-Azofeifa D, Klein OD. Tools and Concepts for Interrogating and Defining Cellular Identity. Cell Stem Cell 2020; 26:632-656. [PMID: 32386555 PMCID: PMC7250495 DOI: 10.1016/j.stem.2020.03.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Defining the mechanisms that generate specialized cell types and coordinate their functions is critical for understanding organ development and renewal. New tools and discoveries are challenging and refining our definitions of a cell type. A rapidly growing toolkit for single-cell analyses has expanded the number of markers that can be assigned to a cell simultaneously, revealing heterogeneity within cell types that were previously regarded as homogeneous populations. Additionally, cell types defined by specific molecular markers can exhibit distinct, context-dependent functions; for example, between tissues in homeostasis and those responding to damage. Here we review the current technologies used to identify and characterize cells, and we discuss how experimental and pathological perturbations are adding increasing complexity to our definitions of cell identity.
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Affiliation(s)
- Kara L McKinley
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA, USA
| | - David Castillo-Azofeifa
- Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA; Program in Craniofacial Biology, University of California, San Francisco, San Francisco, CA, USA
| | - Ophir D Klein
- Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA; Program in Craniofacial Biology, University of California, San Francisco, San Francisco, CA, USA; Department of Pediatrics, University of California, San Francisco, San Francisco, CA, USA; Institute for Human Genetics, University of California, San Francisco, San Francisco, CA, USA.
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44
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Piedrafita G, Kostiou V, Wabik A, Colom B, Fernandez-Antoran D, Herms A, Murai K, Hall BA, Jones PH. A single-progenitor model as the unifying paradigm of epidermal and esophageal epithelial maintenance in mice. Nat Commun 2020; 11:1429. [PMID: 32188860 PMCID: PMC7080751 DOI: 10.1038/s41467-020-15258-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 02/26/2020] [Indexed: 01/04/2023] Open
Abstract
In adult skin epidermis and the epithelium lining the esophagus cells are constantly shed from the tissue surface and replaced by cell division. Tracking genetically labelled cells in transgenic mice has given insight into cell behavior, but conflicting models appear consistent with the results. Here, we use an additional transgenic assay to follow cell division in mouse esophagus and the epidermis at multiple body sites. We find that proliferating cells divide at a similar rate, and place bounds on the distribution cell cycle times. By including these results in a common analytic approach, we show that data from eight lineage tracing experiments is consistent with tissue maintenance by a single population of proliferating cells. The outcome of a given cell division is unpredictable but, on average, the likelihood of producing proliferating and differentiating cells is equal, ensuring cellular homeostasis. These findings are key to understanding squamous epithelial homeostasis and carcinogenesis.
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Affiliation(s)
- Gabriel Piedrafita
- Wellcome Sanger Institute, Hinxton, CB10 1SA, UK
- Spanish National Cancer Research Centre (CNIO), C/Melchor Fernández Almagro 3, Madrid, 29029, Spain
| | - Vasiliki Kostiou
- MRC Cancer Unit, University of Cambridge, Hutchison-MRC Research Centre, Box 197, Cambridge Biomedical Campus, Cambridge, CB2 0XZ, UK
| | | | | | | | - Albert Herms
- Wellcome Sanger Institute, Hinxton, CB10 1SA, UK
| | - Kasumi Murai
- Wellcome Sanger Institute, Hinxton, CB10 1SA, UK
| | - Benjamin A Hall
- MRC Cancer Unit, University of Cambridge, Hutchison-MRC Research Centre, Box 197, Cambridge Biomedical Campus, Cambridge, CB2 0XZ, UK.
| | - Philip H Jones
- Wellcome Sanger Institute, Hinxton, CB10 1SA, UK.
- MRC Cancer Unit, University of Cambridge, Hutchison-MRC Research Centre, Box 197, Cambridge Biomedical Campus, Cambridge, CB2 0XZ, UK.
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45
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Kalish JM, Tang XH, Scognamiglio T, Zhang T, Gudas LJ. Doxycycline-induced exogenous Bmi-1 expression enhances tumor formation in a murine model of oral squamous cell carcinoma. Cancer Biol Ther 2020; 21:400-411. [PMID: 32037955 DOI: 10.1080/15384047.2020.1720485] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
B Cell-Specific Moloney Murine Leukemia Virus Integration Site 1 (Bmi-1, Bmi1), an epigenetic protein, is necessary for normal stem cell self-renewal in adult animals and for cancer stem cell (CSC) functions in adult animals. To elucidate the functions of Bmi-1 in the oral cavity we created a transgenic mouse line (KrTBmi-1) that expresses ectopic, Flag-tagged Bmi-1 in tongue basal epithelial stem cells only upon doxycycline (DOX) treatment. Genome wide transcriptomics and Ingenuity Pathway Analysis identified several pathways altered by exogenous Bmi-1 expression in the normal tongue epithelium, including EIF2 signaling (P value = 1.58 x 10-49), mTOR signaling (P value = 2.45 x 10-12), oxidative phosphorylation (P = 6.61 x 10-3) and glutathione redox reactions I (P = 1.74 x 10-2). Overall, our data indicate that ectopic Bmi-1 expression has an impact on normal tongue epithelial homeostasis. We then assessed the KrTBmi-1 mice in the 4-nitroquinoline 1-oxide (4-NQO) model of oral carcinogenesis. We found that 80% of mice expressing exogenous Bmi-1 (+DOX, +4-NQO KrTBmi-1; N = 10) developed tumors classified as grade 3 or higher, compared to 60% and 40% of mice expressing just endogenous Bmi-1 (+DOX, +4-NQO Kr and -DOX, +4-NQO KrTBmi-1 groups, respectively; N = 10/group; P value = <0.0001); and 30% of mice expressing ectopic Bmi-1 mice developed 20 or more lesions compared to 10% of mice expressing only endogenous Bmi-1 (P = .009). This demonstrates that exogenous Bmi-1 expression increases the susceptibility of mice to 4-NQO-induced oral carcinogenesis, strengthening the evidence for Bmi-1 as a therapeutic target in human oral squamous cell carcinoma.
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Affiliation(s)
- Jocelin M Kalish
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA.,Department of Pharmacology, Weill Cornell Graduate School of Biomedical Sciences, New York, NY, USA.,Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Xiao-Han Tang
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA.,Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | | | - Tuo Zhang
- Weill Cornell Genomics Core Facility, Weill Cornell Medical College, New York, NY, USA
| | - Lorraine J Gudas
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA.,Department of Pharmacology, Weill Cornell Graduate School of Biomedical Sciences, New York, NY, USA.,Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
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46
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Lough KJ, Byrd KM, Descovich CP, Spitzer DC, Bergman AJ, Beaudoin GM, Reichardt LF, Williams SE. Telophase correction refines division orientation in stratified epithelia. eLife 2019; 8:49249. [PMID: 31833472 PMCID: PMC6959978 DOI: 10.7554/elife.49249] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 12/12/2019] [Indexed: 02/06/2023] Open
Abstract
During organogenesis, precise control of spindle orientation balances proliferation and differentiation. In the developing murine epidermis, planar and perpendicular divisions yield symmetric and asymmetric fate outcomes, respectively. Classically, division axis specification involves centrosome migration and spindle rotation, events occurring early in mitosis. Here, we identify a novel orientation mechanism which corrects erroneous anaphase orientations during telophase. The directionality of reorientation correlates with the maintenance or loss of basal contact by the apical daughter. While the scaffolding protein LGN is known to determine initial spindle positioning, we show that LGN also functions during telophase to reorient oblique divisions toward perpendicular. The fidelity of telophase correction also relies on the tension-sensitive adherens junction proteins vinculin, α-E-catenin, and afadin. Failure of this corrective mechanism impacts tissue architecture, as persistent oblique divisions induce precocious, sustained differentiation. The division orientation plasticity provided by telophase correction may enable progenitors to adapt to local tissue needs.
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Affiliation(s)
- Kendall J Lough
- Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, United States.,Department of Biology, Lineberger Comprehensive Cancer Centre, The University of North Carolina, Chapel Hill, United States
| | - Kevin M Byrd
- Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, United States.,Department of Biology, Lineberger Comprehensive Cancer Centre, The University of North Carolina, Chapel Hill, United States.,Department of Oral & Craniofacial Health Sciences, The University of North Carolina School of Dentistry, Chapel Hill, United States
| | - Carlos P Descovich
- Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, United States.,Department of Biology, Lineberger Comprehensive Cancer Centre, The University of North Carolina, Chapel Hill, United States
| | - Danielle C Spitzer
- Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, United States.,Department of Biology, Lineberger Comprehensive Cancer Centre, The University of North Carolina, Chapel Hill, United States
| | - Abby J Bergman
- Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, United States.,Department of Biology, Lineberger Comprehensive Cancer Centre, The University of North Carolina, Chapel Hill, United States
| | - Gerard Mj Beaudoin
- Department of Biochemistry & Biophysics, University of California, San Francisco, San Francisco, United States.,Department of Physiology, University of California, San Francisco, San Francisco, United States
| | - Louis F Reichardt
- Department of Biochemistry & Biophysics, University of California, San Francisco, San Francisco, United States.,Department of Physiology, University of California, San Francisco, San Francisco, United States
| | - Scott E Williams
- Department of Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, United States.,Department of Biology, Lineberger Comprehensive Cancer Centre, The University of North Carolina, Chapel Hill, United States
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47
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Yuan X, Xu Q, Zhang X, Van Brunt LA, Ticha P, Helms JA. Wnt-Responsive Stem Cell Fates in the Oral Mucosa. iScience 2019; 21:84-94. [PMID: 31655258 PMCID: PMC6820246 DOI: 10.1016/j.isci.2019.10.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 09/12/2019] [Accepted: 10/04/2019] [Indexed: 02/05/2023] Open
Abstract
Epithelia of the oral cavity exhibit variations in morphologies and turnover rates. Are these differences related to environment or to region-specific stem cell populations? A lineage-tracing strategy allowed visualization of Wnt-responsive cells, and their progeny, in the hard and soft palates. In both anatomic locations, Wnt-responsive basal cells self-renewed and gave rise to supra-basal cells. Palatal injuries triggered an enlargement of this population, and their descendants were responsible for wound re-epithelialization. Compared with the hard palate, soft palate stem cells exhibited an earlier, more robust burst in proliferation, culminating in significantly faster repair. Thereafter, excess Wnt-responsive basal cells were removed, and stem cell numbers were restored back to homeostatic level. Thus, we uncovered a stem cell population in oral mucosa, and its relative abundance is correlate with the rate of oral wound healing. Besides the activation during injury, an endogenous mechanism exists to constrain the stem cell pool after repair.
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Affiliation(s)
- Xue Yuan
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA 94304, USA.
| | - Quanchen Xu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA 94304, USA; The Affiliated Hospital of Qingdao University, College of Stomatology, Qingdao University, Qingdao 266003, China
| | - Xiaohui Zhang
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA 94304, USA; State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Lauren A Van Brunt
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA 94304, USA
| | - Pavla Ticha
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA 94304, USA
| | - Jill A Helms
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA 94304, USA.
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48
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Divide and conquer: two stem cell populations in squamous epithelia, reserves and the active duty forces. Int J Oral Sci 2019; 11:26. [PMID: 31451683 PMCID: PMC6802623 DOI: 10.1038/s41368-019-0061-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 06/09/2019] [Accepted: 07/22/2019] [Indexed: 12/22/2022] Open
Abstract
Stem cells are of great interest to the scientific community due to their potential role in regenerative and rejuvenative medicine. However, their role in the aging process and carcinogenesis remains unclear. Because DNA replication in stem cells may contribute to the background mutation rate and thereby to cancer, reducing proliferation and establishing a relatively quiescent stem cell compartment has been hypothesized to limit DNA replication-associated mutagenesis. On the other hand, as the main function of stem cells is to provide daughter cells to build and maintain tissues, the idea of a quiescent stem cell compartment appears counterintuitive. Intriguing observations in mice have led to the idea of separated stem cell compartments that consist of cells with different proliferative activity. Some epithelia of short-lived rodents appear to lack quiescent stem cells. Comparing stem cells of different species and different organs (comparative stem cell biology) may allow us to elucidate the evolutionary pressures such as the balance between cancer and longevity that govern stem cell biology (evolutionary stem cell biology). The oral mucosa and its stem cells are an exciting model system to explore the characteristics of quiescent stem cells that have eluded biologists for decades.
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49
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desJardins-Park HE, Mascharak S, Chinta MS, Wan DC, Longaker MT. The Spectrum of Scarring in Craniofacial Wound Repair. Front Physiol 2019; 10:322. [PMID: 30984020 PMCID: PMC6450464 DOI: 10.3389/fphys.2019.00322] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Accepted: 03/11/2019] [Indexed: 12/11/2022] Open
Abstract
Fibrosis is intimately linked to wound healing and is one of the largest causes of wound-related morbidity. While scar formation is the normal and inevitable outcome of adult mammalian cutaneous wound healing, scarring varies widely between different anatomical sites. The spectrum of craniofacial wound healing spans a particularly diverse range of outcomes. While most craniofacial wounds heal by scarring, which can be functionally and aesthetically devastating, healing of the oral mucosa represents a rare example of nearly scarless postnatal healing in humans. In this review, we describe the typical wound healing process in both skin and the oral cavity. We present clinical correlates and current therapies and discuss the current state of research into mechanisms of scarless healing, toward the ultimate goal of achieving scarless adult skin healing.
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Affiliation(s)
- Heather E. desJardins-Park
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Stanford University School of Medicine, Stanford, CA, United States
| | - Shamik Mascharak
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Stanford University School of Medicine, Stanford, CA, United States
| | - Malini S. Chinta
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Stanford University School of Medicine, Stanford, CA, United States
| | - Derrick C. Wan
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Stanford University School of Medicine, Stanford, CA, United States
| | - Michael T. Longaker
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Stanford University School of Medicine, Stanford, CA, United States
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, United States
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