1
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Chioccioli M, Liu S, Magruder S, Tata A, Borriello L, McDonough JE, Konkimalla A, Kim SH, Nouws J, Gonzalez DG, Traub B, Ye X, Yang T, Entenberg DR, Krishnaswamy S, Hendry CE, Kaminski N, Tata PR, Sauler M. Stem cell migration drives lung repair in living mice. Dev Cell 2024; 59:830-840.e4. [PMID: 38377991 PMCID: PMC11003834 DOI: 10.1016/j.devcel.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 06/12/2023] [Accepted: 02/06/2024] [Indexed: 02/22/2024]
Abstract
Tissue repair requires a highly coordinated cellular response to injury. In the lung, alveolar type 2 cells (AT2s) act as stem cells to replenish both themselves and alveolar type 1 cells (AT1s); however, the complex orchestration of stem cell activity after injury is poorly understood. Here, we establish longitudinal imaging of AT2s in murine intact tissues ex vivo and in vivo in order to track their dynamic behavior over time. We discover that a large fraction of AT2s become motile following injury and provide direct evidence for their migration between alveolar units. High-resolution morphokinetic mapping of AT2s further uncovers the emergence of distinct motile phenotypes. Inhibition of AT2 migration via genetic depletion of ArpC3 leads to impaired regeneration of AT2s and AT1s in vivo. Together, our results establish a requirement for stem cell migration between alveolar units and identify properties of stem cell motility at high cellular resolution.
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Affiliation(s)
- Maurizio Chioccioli
- Department of Genetics and Comparative Medicine, Yale University, New Haven, CT 06519, USA; Department of Comparative Medicine, Yale University, New Haven, CT 06519, USA.
| | - Shuyu Liu
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Sumner Magruder
- Department of Computer Science, Yale University, New Haven, CT 06511, USA
| | - Aleksandra Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Lucia Borriello
- Department of Cancer and Cellular Biology, Lewis Katz School of Medicine, Fox Chase Cancer, Philadelphia, PA 19140, USA
| | - John E McDonough
- Faculty of Health Sciences, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Arvind Konkimalla
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA; Medical Scientist Training Program, Duke University School of Medicine, Durham, NC 27710, USA
| | - Sang-Hun Kim
- Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT 06520, USA
| | - Jessica Nouws
- Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT 06520, USA
| | - David G Gonzalez
- Department of Genetics and Comparative Medicine, Yale University, New Haven, CT 06519, USA
| | - Brian Traub
- Department of Pathology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY 10461, USA
| | - Xianjun Ye
- Department of Pathology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY 10461, USA
| | - Tao Yang
- Section of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - David R Entenberg
- Department of Pathology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY 10461, USA
| | - Smita Krishnaswamy
- Department of Genetics and Comparative Medicine, Yale University, New Haven, CT 06519, USA; Department of Computer Science, Yale University, New Haven, CT 06511, USA
| | - Caroline E Hendry
- Department of Genetics and Comparative Medicine, Yale University, New Haven, CT 06519, USA
| | - Naftali Kaminski
- Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT 06520, USA
| | - Purushothama Rao Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Maor Sauler
- Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT 06520, USA
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2
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Konkimalla A, Konishi S, Macadlo L, Kobayashi Y, Farino ZJ, Miyashita N, El Haddad L, Morowitz J, Barkauskas CE, Agarwal P, Souma T, ElMallah MK, Tata A, Tata PR. Transitional cell states sculpt tissue topology during lung regeneration. Cell Stem Cell 2023; 30:1486-1502.e9. [PMID: 37922879 PMCID: PMC10762634 DOI: 10.1016/j.stem.2023.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 06/22/2023] [Accepted: 10/03/2023] [Indexed: 11/07/2023]
Abstract
Organ regeneration requires dynamic cell interactions to reestablish cell numbers and tissue architecture. While we know the identity of progenitor cells that replace lost tissue, the transient states they give rise to and their role in repair remain elusive. Here, using multiple injury models, we find that alveolar fibroblasts acquire distinct states marked by Sfrp1 and Runx1 that influence tissue remodeling and reorganization. Unexpectedly, ablation of alveolar epithelial type-1 (AT1) cells alone is sufficient to induce tissue remodeling and transitional states. Integrated scRNA-seq followed by genetic interrogation reveals RUNX1 is a key driver of fibroblast states. Importantly, the ectopic induction or accumulation of epithelial transitional states induce rapid formation of transient alveolar fibroblasts, leading to organ-wide fibrosis. Conversely, the elimination of epithelial or fibroblast transitional states or RUNX1 loss, leads to tissue simplification resembling emphysema. This work uncovered a key role for transitional states in orchestrating tissue topologies during regeneration.
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Affiliation(s)
- Arvind Konkimalla
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA; Medical Scientist Training Program, Duke University School of Medicine, Durham, NC 27710, USA
| | - Satoshi Konishi
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Lauren Macadlo
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Yoshihiko Kobayashi
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Zachary J Farino
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Naoya Miyashita
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Léa El Haddad
- Division of Pulmonary and Sleep Medicine, Department of Pediatrics, School of Medicine, Duke University, Durham, NC, USA
| | - Jeremy Morowitz
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Christina E Barkauskas
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA
| | - Pankaj Agarwal
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Tomokazu Souma
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, NC, USA; Duke Regeneration Center, Duke University, Durham, NC 27710, USA
| | - Mai K ElMallah
- Division of Pulmonary and Sleep Medicine, Department of Pediatrics, School of Medicine, Duke University, Durham, NC, USA
| | - Aleksandra Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA.
| | - Purushothama Rao Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA; Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA; Duke Regeneration Center, Duke University, Durham, NC 27710, USA; Center for Advanced Genomic Technologies, Duke University, Durham, NC 27710, USA; Duke Cancer Institute, Duke University School of Medicine, Durham, NC 27710, USA.
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3
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Konkimalla A, Elmore Z, Konishi S, Macadlo L, Katsura H, Tata A, Asokan A, Tata PR. Efficient Adeno-associated Virus-mediated Transgenesis in Alveolar Stem Cells and Associated Niches. Am J Respir Cell Mol Biol 2023; 69:255-265. [PMID: 37315312 PMCID: PMC10503306 DOI: 10.1165/rcmb.2022-0424ma] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 06/13/2023] [Indexed: 06/16/2023] Open
Abstract
Targeted delivery of transgenes to tissue-resident stem cells and related niches offers avenues for interrogating pathways and editing endogenous alleles for therapeutic interventions. Here, we survey multiple adeno-associated virus (AAV) serotypes, administered via intranasal and retroorbital routes in mice, to target lung alveolar stem cell niches. We found that AAV5, AAV4, and AAV8 efficiently and preferentially transduce alveolar type-2 stem cells (AT2s), endothelial cells, and PDGFRA+ fibroblasts, respectively. Notably, some AAVs show different cell tropisms depending on the route of administration. Proof-of-concept experiments reveal the versatility of AAV5-mediated transgenesis for AT2-lineage labeling, clonal cell tracing after cell ablation, and conditional gene inactivation in both postnatal and adult mouse lungs in vivo. AAV6, but not AAV5, efficiently transduces both mouse and human AT2s in alveolar organoid cultures. Furthermore, AAV5 and AAV6 can be used to deliver guide RNAs and transgene cassettes for homologous recombination in vivo and ex vivo, respectively. Using this system coupled with clonal derivation of AT2 organoids, we demonstrate efficient and simultaneous editing of multiple loci, including targeted insertion of a payload cassette in AT2s. Taken together, our studies highlight the powerful utility of AAVs for interrogating alveolar stem cells and other specific cell types both in vivo and ex vivo.
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Affiliation(s)
| | | | | | | | | | | | - Aravind Asokan
- Department of Surgery
- Department of Molecular Genetics and Microbiology
- Department of Biomedical Engineering
- Center for Advanced Genomic Technologies, and
- Duke Regeneration Center, Duke University, Durham, North Carolina
| | - Purushothama Rao Tata
- Department of Cell Biology
- Duke Cancer Institute, and
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Duke University School of Medicine, Durham, North Carolina
- Center for Advanced Genomic Technologies, and
- Duke Regeneration Center, Duke University, Durham, North Carolina
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4
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Konkimalla A, Konishi S, Kobayashi Y, Kadur Lakshminarasimha Murthy P, Macadlo L, Mukherjee A, Elmore Z, Kim SJ, Pendergast AM, Lee PJ, Asokan A, Knudsen L, Bravo-Cordero JJ, Tata A, Tata PR. Multi-apical polarity of alveolar stem cells and their dynamics during lung development and regeneration. iScience 2022; 25:105114. [PMID: 36185377 PMCID: PMC9519774 DOI: 10.1016/j.isci.2022.105114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 08/25/2022] [Accepted: 09/08/2022] [Indexed: 11/24/2022] Open
Abstract
Epithelial cells of diverse tissues are characterized by the presence of a single apical domain. In the lung, electron microscopy studies have suggested that alveolar type-2 epithelial cells (AT2s) en face multiple alveolar sacs. However, apical and basolateral organization of the AT2s and their establishment during development and remodeling after injury repair remain unknown. Thick tissue imaging and electron microscopy revealed that a single AT2 can have multiple apical domains that enface multiple alveoli. AT2s gradually establish multi-apical domains post-natally, and they are maintained throughout life. Lineage tracing, live imaging, and selective cell ablation revealed that AT2s dynamically reorganize multi-apical domains during injury repair. Single-cell transcriptome signatures of residual AT2s revealed changes in cytoskeleton and cell migration. Significantly, cigarette smoke and oncogene activation lead to dysregulation of multi-apical domains. We propose that the multi-apical domains of AT2s enable them to be poised to support the regeneration of a large array of alveolar sacs.
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Affiliation(s)
- Arvind Konkimalla
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
- Medical Scientist Training Program, Duke University School of Medicine, Durham, NC 27710, USA
| | - Satoshi Konishi
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Yoshihiko Kobayashi
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | | | - Lauren Macadlo
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Ananya Mukherjee
- Division of Hematology and Oncology, Department of Medicine, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Zachary Elmore
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710, USA
| | - So-Jin Kim
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Duke University School of Medicine and the Durham Veterans Administration Medical Center, Durham, NC 27710, USA
| | - Ann Marie Pendergast
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710, USA
- Duke Cancer Institute, Duke University School of Medicine, Durham, NC 27710, USA
| | - Patty J. Lee
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Duke University School of Medicine and the Durham Veterans Administration Medical Center, Durham, NC 27710, USA
| | - Aravind Asokan
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710, USA
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA
- Department of Biomedical Engineering, Regeneration Next, Duke University, Durham, NC 27710, USA
- Center for Advanced Genomic Technologies, Duke University, Durham, NC 27710, USA
| | - Lars Knudsen
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover 30625, Germany
| | - Jose Javier Bravo-Cordero
- Division of Hematology and Oncology, Department of Medicine, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Aleksandra Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Purushothama Rao Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Duke University School of Medicine and the Durham Veterans Administration Medical Center, Durham, NC 27710, USA
- Duke Cancer Institute, Duke University School of Medicine, Durham, NC 27710, USA
- Center for Advanced Genomic Technologies, Duke University, Durham, NC 27710, USA
- Duke Regeneration Center, Duke University, Durham, NC 27710, USA
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5
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Abstract
Lung epithelium, the lining that covers the inner surface of the respiratory tract, is directly exposed to the environment and thus susceptible to airborne toxins, irritants, and pathogen-induced damages. In adult mammalian lungs, epithelial cells are generally quiescent but can respond rapidly to repair of damaged tissues. Evidence from experimental injury models in rodents and human clinical samples has led to the identification of these regenerative cells, as well as pathological metaplastic states specifically associated with different forms of damages. Here, we provide a compendium of cells and cell states that exist during homeostasis in normal lungs and the lineage relationships between them. Additionally, we discuss various experimental injury models currently being used to probe the cellular sources-both resident and recruited-that contribute to repair, regeneration, and remodeling following acute and chronic injuries. Finally, we discuss certain maladaptive regeneration-associated cell states and their role in disease pathogenesis.
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Affiliation(s)
- Arvind Konkimalla
- Department of Cell Biology, Duke University School of Medicine, Durham, North Carolina 27710, USA.,Medical Scientist Training Program, Duke University School of Medicine, Durham, North Carolina 27710, USA
| | - Aleksandra Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, North Carolina 27710, USA
| | - Purushothama Rao Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, North Carolina 27710, USA.,Duke Cancer Institute, Duke University School of Medicine, Durham, North Carolina 27710, USA.,Center for Advanced Genomic Technologies, Duke University, Durham, North Carolina 27710, USA.,Duke Regeneration Center, Duke University School of Medicine, Durham, North Carolina 27710, USA
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6
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Kobayashi Y, Tata A, Konkimalla A, Katsura H, Lee RF, Ou J, Banovich NE, Kropski JA, Tata PR. Persistence of a regeneration-associated, transitional alveolar epithelial cell state in pulmonary fibrosis. Nat Cell Biol 2020; 22:934-946. [PMID: 32661339 PMCID: PMC7461628 DOI: 10.1038/s41556-020-0542-8] [Citation(s) in RCA: 241] [Impact Index Per Article: 60.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 06/08/2020] [Indexed: 12/21/2022]
Abstract
Stem cells undergo dynamic changes in response to injury to regenerate lost cells. However, the identity of transitional states and the mechanisms that drive their trajectories remain understudied. Using lung organoids, multiple in vivo repair models, single-cell transcriptomics and lineage tracing, we find that alveolar type-2 epithelial cells undergoing differentiation into type-1 cells acquire pre-alveolar type-1 transitional cell state (PATS) en route to terminal maturation. Transitional cells undergo extensive stretching during differentiation, making them vulnerable to DNA damage. Cells in the PATS show an enrichment of TP53, TGFβ, DNA-damage-response signalling and cellular senescence. Gain and loss of function as well as genomic binding assays revealed a direct transcriptional control of PATS by TP53 signalling. Notably, accumulation of PATS-like cells in human fibrotic lungs was observed, suggesting persistence of the transitional state in fibrosis. Our study thus implicates a transient state associated with senescence in normal epithelial tissue repair and its abnormal persistence in disease conditions.
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Affiliation(s)
- Yoshihiko Kobayashi
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA
| | - Aleksandra Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA
| | - Arvind Konkimalla
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA
- Medical Scientist Training Program, Duke University School of Medicine, Durham, NC, USA
| | - Hiroaki Katsura
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA
| | - Rebecca F Lee
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA
| | - Jianhong Ou
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA
- Regeneration Next, Duke University, Durham, NC, USA
| | | | - Jonathan A Kropski
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Veterans Affairs Medical Center, Nashville, TN, USA
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Purushothama Rao Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA.
- Regeneration Next, Duke University, Durham, NC, USA.
- Duke Cancer Institute, Duke University School of Medicine, Durham, NC, USA.
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7
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Tata PR, Chow RD, Saladi SV, Tata A, Konkimalla A, Bara A, Montoro D, Hariri LP, Shih AR, Mino-Kenudson M, Mou H, Kimura S, Ellisen LW, Rajagopal J. Developmental History Provides a Roadmap for the Emergence of Tumor Plasticity. Dev Cell 2018; 44:679-693.e5. [PMID: 29587142 PMCID: PMC5875457 DOI: 10.1016/j.devcel.2018.02.024] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 01/15/2018] [Accepted: 02/26/2018] [Indexed: 02/03/2023]
Abstract
We show that the loss or gain of transcription factor programs that govern embryonic cell-fate specification is associated with a form of tumor plasticity characterized by the acquisition of alternative cell fates normally characteristic of adjacent organs. In human non-small cell lung cancers, downregulation of the lung lineage-specifying TF NKX2-1 is associated with tumors bearing features of various gut tissues. Loss of Nkx2-1 from murine alveolar, but not airway, epithelium results in conversion of lung cells to gastric-like cells. Superimposing oncogenic Kras activation enables further plasticity in both alveolar and airway epithelium, producing tumors that adopt midgut and hindgut fates. Conversely, coupling Nkx2-1 loss with foregut lineage-specifying SOX2 overexpression drives the formation of squamous cancers with features of esophageal differentiation. These findings demonstrate that elements of pathologic tumor plasticity mirror the normal developmental history of organs in that cancer cells acquire cell fates associated with developmentally related neighboring organs.
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Affiliation(s)
- Purushothama Rao Tata
- Department of Cell Biology, Duke University, Durham, NC 27710, USA; Duke Cancer Institute, Duke University, Durham, NC 27710, USA; Division of Pulmonary Critical care, Department of Medicine, Duke University School of Medicine, 307 Research Dr., Nanaline Duke Building, Room 308, Durham, NC 27710, USA; Regeneration Next, Duke University, Durham, NC 27710, USA.
| | - Ryan D Chow
- Department of Genetics, Systems Biology Institute, Medical Scientist Training Program, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Srinivas Vinod Saladi
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA 02114, USA
| | - Aleksandra Tata
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Arvind Konkimalla
- Department of Cell Biology, Duke University, Durham, NC 27710, USA; Medical Scientist Training Program, Duke University School of Medicine, Durham, NC 27710, USA
| | - Anne Bara
- Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Daniel Montoro
- Center for Regenerative Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, USA
| | - Lida P Hariri
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Angela R Shih
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Mari Mino-Kenudson
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Hongmei Mou
- Department of Pediatrics, Massachusetts General Hospital, Boston, MA 02114, USA; Mucosal Immunology and Biology Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Shioko Kimura
- Laboratory of Metabolism, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Leif W Ellisen
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA 02114, USA
| | - Jayaraj Rajagopal
- Center for Regenerative Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, USA; Departments of Internal Medicine and Pediatrics, Pulmonary and Critical Care Unit, Massachusetts General Hospital, Boston, MA 02114, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Ludwig Center at Harvard, Boston, MA 02115, USA; Massachusetts General Hospital for Children, Pediatric Pulmonary Medicine, Boston, MA, USA
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8
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Abstract
Precise lineage trajectories and the cellular sources that contribute to regeneration after injury are largely unknown in many tissues. In this issue of Cell Stem Cell, Gadye et al. (2017) and Lin et al. (2017) show that olfactory epithelial cells transit through unique and unfamiliar paths of differentiation and undergo lineage reversion, respectively, during regeneration.
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Affiliation(s)
- Arvind Konkimalla
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA; Medical Scientist Training Program, Duke University School of Medicine, Durham, NC 27710, USA
| | - Purushothama Rao Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA; Duke Cancer Institute, Duke University School of Medicine, Durham, NC 27710, USA; Regeneration Next, Duke University, Durham, NC 27710, USA.
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