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Gao C, Chen L, Chen E, Tsilosani A, Xia Y, Zhang W. Generation of Distal Renal Segments Involves a Unique Population of Aqp2 + Progenitor Cells. J Am Soc Nephrol 2021; 32:3035-3049. [PMID: 34667084 PMCID: PMC8638390 DOI: 10.1681/asn.2021030399] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 08/02/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Progenitor cells have clonogenicity, self-renewal, and multipotential capacity, and they can generate multiple types of cells during development. Evidence demonstrating the existence of such progenitor cells for renal distal segments is lacking. METHODS To identify Aqp2 + progenitor (AP) cells, we performed in vivo lineage tracing using both constitutive ( Aqp2Cre RFP/+ ) and Tamoxifen-inducible ( Aqp2 ECE/+ RFP/+ , Aqp2 ECE/+ Brainbow/+ , and Aqp2 ECE/+ Brainbow/Brainbow ) mouse models. Aqp2Cre RFP/+ mice were analyzed from E14.5 to adult stage. The inducible models were induced at P1 and examined at P3 and P42, respectively. Multiple segment- or cell-specific markers were used for high-resolution immunofluorescence confocal microscopy analyses to identify the cell types derived from Aqp2 + cells. RESULTS Both Aqp2Cre and Aqp2 ECE/+ faithfully indicate the activation of the endogenous Aqp2 promoter for lineage tracing. A subset of Aqp2 + cells behaves as potential AP. Aqp2Cre -based lineage tracing revealed that embryonic APs generate five types of cells, which form the late distal convoluted tubule (DCT2), connecting tubule segments 1 and 2 (CNT1 and CNT2, respectively), and collecting ducts (CDs). The α - and β -intercalated cells were apparently derived from embryonic AP in a stepwise manner. Aqp2 ECE/+ -based lineage tracing identified cells coexpressing Aqp2 and V-ATPase subunits B1 and B2 as the potential AP. Neonate APs generate daughter cells either inheriting their property (self-renewal) or evolving into various DCT2, CNT, or CD cells (multipotentiality), forming single cell-derived multiple-cell clones (clonogenicity) during development. CONCLUSION Our study demonstrates that unique Aqp2 + B1B2 + cells are the potential APs to generate DCT2, CNT, CNT2, and CD segments.
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Affiliation(s)
- Chao Gao
- Department of Regenerative & Cancer Cell Biology, Albany Medical College, Albany, New York
| | - Lihe Chen
- Epithelial Systems Biology Laboratory, Systems Biology Center, National Heart, Lung, and Blood Institute, Bethesda, Maryland
| | - Enuo Chen
- Department of Regenerative & Cancer Cell Biology, Albany Medical College, Albany, New York
| | - Akaki Tsilosani
- Department of Regenerative & Cancer Cell Biology, Albany Medical College, Albany, New York
| | - Yang Xia
- Department of Biochemistry and Molecular Biology, University of Texas Health Science Center at Houston, Houston, Texas
| | - Wenzheng Zhang
- Department of Regenerative & Cancer Cell Biology, Albany Medical College, Albany, New York
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Villanueva A, Alsinet C, Yanger K, Hoshida Y, Zong Y, Toffanin S, Rodriguez-Carunchio L, Solé M, Thung S, Stanger BZ, Llovet JM. Notch signaling is activated in human hepatocellular carcinoma and induces tumor formation in mice. Gastroenterology 2012; 143:1660-1669.e7. [PMID: 22974708 PMCID: PMC3505826 DOI: 10.1053/j.gastro.2012.09.002] [Citation(s) in RCA: 239] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 09/03/2012] [Accepted: 09/06/2012] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS The Notch signaling pathway is activated in leukemia and solid tumors (such as lung cancer), but little is known about its role in liver cancer. METHODS The intracellular domain of Notch was conditionally expressed in hepatoblasts and their progeny (hepatocytes and cholangiocytes) in mice. This was achieved through Cre expression under the control of an albumin and α-fetoprotein (AFP) enhancer and promoter (AFP-Notch intracellular domain [NICD]). We used comparative functional genomics to integrate transcriptome data from AFP-NICD mice and human hepatocellular carcinoma (HCC) samples (n = 683). A Notch gene signature was generated using the nearest template prediction method. RESULTS AFP-NICD mice developed HCC with 100% penetrance when they were 12 months old. Activation of Notch signaling correlated with activation of 3 promoters of insulin-like growth factor 2; these processes appeared to contribute to hepatocarcinogenesis. Comparative functional genomic analysis identified a signature of Notch activation in 30% of HCC samples from patients. These samples had altered expression in Notch pathway genes and activation of insulin-like growth factor signaling, despite a low frequency of mutations in regions of NOTCH1 associated with cancer. Blocking Notch signaling in liver cancer cells with the Notch activation signature using γ-secretase inhibitors or by expressing a dominant negative form of mastermind-like 1 reduced their proliferation in vitro. CONCLUSIONS Notch signaling is activated in human HCC samples and promotes formation of liver tumors in mice. The Notch signature is a biomarker of response to Notch inhibition in vitro.
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Affiliation(s)
- Augusto Villanueva
- HCC Translational Research Laboratory, Barcelona-Clínic Liver Cancer Group, Institut d’Investigacions Biomèdiques August Pi i Sunyer, Liver Unit and Pathology Department. Hospital Clínic, University of Barcelona, Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Instituto Carlos III, Madrid, Spain
| | - Clara Alsinet
- HCC Translational Research Laboratory, Barcelona-Clínic Liver Cancer Group, Institut d’Investigacions Biomèdiques August Pi i Sunyer, Liver Unit and Pathology Department. Hospital Clínic, University of Barcelona, Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Instituto Carlos III, Madrid, Spain
| | - Kilangsungla Yanger
- Departments of Medicine and Cell and Developmental Biology, Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Yujin Hoshida
- Cancer Program, Broad Institute, Cambridge, Massachusetts, USA,Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, USA
| | - Yiwei Zong
- Departments of Medicine and Cell and Developmental Biology, Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Sara Toffanin
- Mount Sinai Liver Cancer Program (Divisions of Liver Diseases and Pathology), Mount Sinai School of Medicine, New York, New York, USA,Gastrointestinal Surgery and Liver Transplantation Unit and Department of Experimental Oncology, National Cancer Institute, Milan, Italy
| | | | - Manel Solé
- Pathology Department, Hospital Clinic, Barcelona, Catalonia, Spain
| | - Swan Thung
- Mount Sinai Liver Cancer Program (Divisions of Liver Diseases and Pathology), Mount Sinai School of Medicine, New York, New York, USA
| | - Ben Z. Stanger
- Departments of Medicine and Cell and Developmental Biology, Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Josep M. Llovet
- HCC Translational Research Laboratory, Barcelona-Clínic Liver Cancer Group, Institut d’Investigacions Biomèdiques August Pi i Sunyer, Liver Unit and Pathology Department. Hospital Clínic, University of Barcelona, Barcelona, Catalonia, Spain,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Instituto Carlos III, Madrid, Spain,Mount Sinai Liver Cancer Program (Divisions of Liver Diseases and Pathology), Mount Sinai School of Medicine, New York, New York, USA,Institució Catalana de Recerca i Estudis Avançats, Barcelona, Catalonia, Spain
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