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Trinh VQH, Ankenbauer KE, Liu J, Batardiere M, Maurer HC, Copeland C, Wong J, Ben-Levy O, Torbit SM, Jarvis B, Revetta F, Ivanov S, Jyotsana N, Makino Y, Ruelas AM, Means AL, Maitra A, Tan MCB, DelGiorno KE. Oncogenic GNAS drives a gastric pylorus program in intraductal papillary mucinous neoplasms of the pancreas. bioRxiv 2024:2024.02.25.581948. [PMID: 38464029 PMCID: PMC10925208 DOI: 10.1101/2024.02.25.581948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
OBJECTIVE Intraductal Papillary Mucinous Neoplasms (IPMNs) are cystic lesions and bona fide precursors for pancreatic ductal adenocarcinoma (PDAC). Recently, we showed that acinar to ductal metaplasia, an injury repair program, is characterized by a transcriptomic program similar to gastric spasmolytic polypeptide expressing metaplasia (SPEM), suggesting common mechanisms of reprogramming between the stomach and pancreas. The aims of this study were to assay IPMN for pyloric markers and to identify molecular drivers of this program. DESIGN We analyzed RNA-seq studies of IPMN for pyloric markers, which were validated by immunostaining in patient samples. Cell lines expressing Kras G12D +/- GNAS R201C were manipulated to identify distinct and overlapping transcriptomic programs driven by each oncogene. A PyScenic-based regulon analysis was performed to identify molecular drivers in the pancreas. Expression of candidate drivers was evaluated by RNA-seq and immunostaining. RESULTS Pyloric markers were identified in human IPMN. GNAS R201C drove expression of these markers in cell lines and siRNA targeting of GNAS R201C or Kras G12D demonstrates that GNAS R201C amplifies a mucinous, pyloric phenotype. Regulon analysis identified a role for transcription factors SPDEF, CREB3L1, and CREB3L4, which are expressed in patient samples. siRNA-targeting of Spdef inhibited mucin production. CONCLUSION De novo expression of a SPEM phenotype has been identified in pancreatitis and a pyloric phenotype in Kras G12D -driven PanIN and Kras G12D ;GNAS R201C -driven IPMN, suggesting common mechanisms of reprogramming between these lesions and the stomach. A transition from a SPEM to pyloric phenotype may reflect disease progression and/or oncogenic mutation. IPMN-specific GNAS R201C amplifies a mucinous phenotype, in part, through SPDEF.
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Wong J, Trinh VQ, Jyotsana N, Baig JF, Revetta F, Shi C, Means AL, DelGiorno KE, Tan M. Differential spatial distribution of HNF4α isoforms during dysplastic progression of intraductal papillary mucinous neoplasms of the pancreas. Sci Rep 2023; 13:20088. [PMID: 37974020 PMCID: PMC10654504 DOI: 10.1038/s41598-023-47238-x] [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: 04/05/2023] [Accepted: 11/10/2023] [Indexed: 11/19/2023] Open
Abstract
Hepatocyte Nuclear Factor 4-alpha (HNF4α) comprises a nuclear receptor superfamily of ligand-dependent transcription factors that yields twelve isoforms in humans, classified into promoters P1 or P2-associated groups with specific functions. Alterations in HNF4α isoforms have been associated with tumorigenesis. However, the distribution of its isoforms during progression from dysplasia to malignancy has not been studied, nor has it yet been studied in intraductal papillary mucinous neoplasms, where both malignant and pre-malignant forms are routinely clinically identified. We examined the expression patterns of pan-promoter, P1-specific, and P2-specific isoform groups in normal pancreatic components and IPMNs. Pan-promoter, P1 and P2 nuclear expression were weakly positive in normal pancreatic components. Nuclear expression for all isoform groups was increased in low-grade IPMN, high-grade IPMN, and well-differentiated invasive adenocarcinoma. Poorly differentiated invasive components in IPMNs showed loss of all forms of HNF4α. Pan-promoter, and P1-specific HNF4α expression showed shifts in subnuclear and sub-anatomical distribution in IPMN, whereas P2 expression was consistently nuclear. Tumor cells with high-grade dysplasia at the basal interface with the stroma showed reduced expression of P1, while P2 was equally expressed in both components. Additional functional studies are warranted to further explore the mechanisms underlying the spatial and differential distribution of HNF4α isoforms in IPMNs.
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Affiliation(s)
- Jahg Wong
- Department of Pathology, University of Montreal, Montreal, QC, Canada
| | - Vincent Q Trinh
- Department of Pathology, University of Montreal, Montreal, QC, Canada
- Institute for Research in Immunology and Cancer of the University of Montreal, Montreal, QC, Canada
- Centre Hospitalier de l'Université de Montréal Research Center, Montreal, QC, Canada
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Nidhi Jyotsana
- Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Jumanah F Baig
- Department of Pathology, University of Montreal, Montreal, QC, Canada
- Institute for Research in Immunology and Cancer of the University of Montreal, Montreal, QC, Canada
| | - Frank Revetta
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Chanjuan Shi
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA
| | - Anna L Means
- Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
- Division of Surgical Oncology and Endocrine Surgery, Vanderbilt University Medical Center, 1211 Medical Center Drive, Nashville, TN, 37232, USA
- Vanderbilt Ingram Cancer Center, Nashville, TN, USA
| | - Kathleen E DelGiorno
- Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
- Vanderbilt Ingram Cancer Center, Nashville, TN, USA
- Vanderbilt Digestive Disease Research Center, Nashville, TN, USA
| | - Marcus Tan
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN, USA.
- Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA.
- Division of Surgical Oncology and Endocrine Surgery, Vanderbilt University Medical Center, 1211 Medical Center Drive, Nashville, TN, 37232, USA.
- Vanderbilt Ingram Cancer Center, Nashville, TN, USA.
- Vanderbilt Digestive Disease Research Center, Nashville, TN, USA.
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Hanna DN, Smith PM, Novitskiy SV, Washington MK, Zi J, Weaver CJ, Hamaamen JA, Lewis KB, Zhu J, Yang J, Liu Q, Beauchamp RD, Means AL. SMAD4 Suppresses Colitis-associated Carcinoma Through Inhibition of CCL20/CCR6-mediated Inflammation. Gastroenterology 2022; 163:1334-1350.e14. [PMID: 35863523 PMCID: PMC9613509 DOI: 10.1053/j.gastro.2022.07.016] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 06/16/2022] [Accepted: 07/07/2022] [Indexed: 12/02/2022]
Abstract
BACKGROUND & AIMS We previously reported that colon epithelial cell silencing of Smad4 increased epithelial expression of inflammatory genes, including the chemokine c-c motif chemokine ligand 20 (CCL20), and increased susceptibility to colitis-associated cancer. Here, we examine the role of the chemokine/receptor pair CCL20/c-c motif chemokine receptor 6 (CCR6) in mediating colitis-associated colon carcinogenesis induced by SMAD4 loss. METHODS In silico analysis of SMAD4, CCL20, and CCR6 messenger RNA expression was performed on published transcriptomic data from human ulcerative colitis (UC), and colon and rectal cancer samples. Immunohistochemistry for CCL20 and CCR6 was performed on human tissue microarrays comprising human UC-associated cancer specimens, Mice with conditional, epithelial-specific Smad4 loss with and without germline deletion of the Ccr6 gene were subjected to colitis and followed for up to 3 months. Tumors were quantified histologically, and immune cell populations were analyzed by flow cytometry and immunostaining. RESULTS In human UC-associated cancers, loss of epithelial SMAD4 was associated with increased CCL20 expression and CCR6+ cells. SMAD4 loss in mouse colon epithelium led to enlarged gut-associated lymphoid tissues and recruitment of immune cells to the mouse colon epithelium and stroma, particularly T regulatory, Th17, and dendritic cells. Loss of CCR6 abrogated these immune responses and significantly reduced the incidence of colitis-associated tumors observed with loss of SMAD4 alone. CONCLUSIONS Regulation of mucosal inflammation is central to SMAD4 tumor suppressor function in the colon. A key downstream node in this regulation is suppression of epithelial CCL20 signaling to CCR6 in immune cells. Loss of SMAD4 in the colon epithelium increases CCL20 expression and chemoattraction of CCR6+ immune cells, contributing to greater susceptibility to colon cancer.
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Affiliation(s)
- David N Hanna
- Department of Surgery, Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Paula Marincola Smith
- Department of Surgery, Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee; Graduate Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Sergey V Novitskiy
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - M Kay Washington
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jinghuan Zi
- Department of Surgery, Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Connie J Weaver
- Department of Surgery, Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jalal A Hamaamen
- Department of Surgery, Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Keeli B Lewis
- Department of Surgery, Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jing Zhu
- Department of Surgery, Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jing Yang
- Graduate Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee; Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Qi Liu
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - R Daniel Beauchamp
- Department of Surgery, Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee; Graduate Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee; Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee, USA; Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
| | - Anna L Means
- Department of Surgery, Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee; Graduate Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee; Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee; Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee, USA; Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
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Ma Z, Lytle NK, Chen B, Jyotsana N, Novak SW, Cho CJ, Caplan L, Ben-Levy O, Neininger AC, Burnette DT, Trinh VQ, Tan MCB, Patterson EA, Arrojo E Drigo R, Giraddi RR, Ramos C, Means AL, Matsumoto I, Manor U, Mills JC, Goldenring JR, Lau KS, Wahl GM, DelGiorno KE. Single-Cell Transcriptomics Reveals a Conserved Metaplasia Program in Pancreatic Injury. Gastroenterology 2022; 162:604-620.e20. [PMID: 34695382 PMCID: PMC8792222 DOI: 10.1053/j.gastro.2021.10.027] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/15/2021] [Accepted: 10/09/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Acinar to ductal metaplasia (ADM) occurs in the pancreas in response to tissue injury and is a potential precursor for adenocarcinoma. The goal of these studies was to define the populations arising from ADM, the associated transcriptional changes, and markers of disease progression. METHODS Acinar cells were lineage-traced with enhanced yellow fluorescent protein (EYFP) to follow their fate post-injury. Transcripts of more than 13,000 EYFP+ cells were determined using single-cell RNA sequencing (scRNA-seq). Developmental trajectories were generated. Data were compared with gastric metaplasia, KrasG12D-induced neoplasia, and human pancreatitis. Results were confirmed by immunostaining and electron microscopy. KrasG12D was expressed in injury-induced ADM using several inducible Cre drivers. Surgical specimens of chronic pancreatitis from 15 patients were evaluated by immunostaining. RESULTS scRNA-seq of ADM revealed emergence of a mucin/ductal population resembling gastric pyloric metaplasia. Lineage trajectories suggest that some pyloric metaplasia cells can generate tuft and enteroendocrine cells (EECs). Comparison with KrasG12D-induced ADM identifies populations associated with disease progression. Activation of KrasG12D expression in HNF1B+ or POU2F3+ ADM populations leads to neoplastic transformation and formation of MUC5AC+ gastric-pit-like cells. Human pancreatitis samples also harbor pyloric metaplasia with a similar transcriptional phenotype. CONCLUSIONS Under conditions of chronic injury, acinar cells undergo a pyloric-type metaplasia to mucinous progenitor-like populations, which seed disparate tuft cell and EEC lineages. ADM-derived EEC subtypes are diverse. KrasG12D expression is sufficient to drive neoplasia when targeted to injury-induced ADM populations and offers an alternative origin for tumorigenesis. This program is conserved in human pancreatitis, providing insight into early events in pancreas diseases.
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Affiliation(s)
- Zhibo Ma
- Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, California
| | - Nikki K Lytle
- Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, California
| | - Bob Chen
- Program in Chemical and Physical Biology, Vanderbilt University School of Medicine, Nashville, Tennessee; Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Nidhi Jyotsana
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Sammy Weiser Novak
- Waitt Advanced Biophotonics Center, Salk Insitute for Biological Studies, La Jolla, California
| | - Charles J Cho
- Section of Gastroenterology and Hepatology, Baylor College of Medicine, Houston, Texas
| | - Leah Caplan
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Olivia Ben-Levy
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Abigail C Neininger
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Dylan T Burnette
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Vanderbilt Ingram Cancer Center, Nashville, Tennessee
| | - Vincent Q Trinh
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Marcus C B Tan
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee; Vanderbilt Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Emilee A Patterson
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee
| | - Rafael Arrojo E Drigo
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee
| | - Rajshekhar R Giraddi
- Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, California
| | - Cynthia Ramos
- Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, California
| | - Anna L Means
- Vanderbilt Ingram Cancer Center, Nashville, Tennessee; Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee; Vanderbilt Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Uri Manor
- Waitt Advanced Biophotonics Center, Salk Insitute for Biological Studies, La Jolla, California
| | - Jason C Mills
- Section of Gastroenterology and Hepatology, Baylor College of Medicine, Houston, Texas
| | - James R Goldenring
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Vanderbilt Ingram Cancer Center, Nashville, Tennessee; Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee; Vanderbilt Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee; Nashville VA Medical Center, Nashville, Tennessee
| | - Ken S Lau
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Vanderbilt Ingram Cancer Center, Nashville, Tennessee; Vanderbilt Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Geoffrey M Wahl
- Gene Expression Laboratory, Salk Institute for Biological Studies, La Jolla, California
| | - Kathleen E DelGiorno
- Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Vanderbilt Ingram Cancer Center, Nashville, Tennessee; Vanderbilt Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee.
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Means AL. Form Follows Function for Local Immune Responses in Pancreatic Cancer. Cell Mol Gastroenterol Hepatol 2021; 12:1879-1880. [PMID: 34592161 PMCID: PMC8591187 DOI: 10.1016/j.jcmgh.2021.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 08/10/2021] [Indexed: 12/10/2022]
Affiliation(s)
- Anna L. Means
- Correspondence Address correspondence to: Anna L. Means, PhD, Department of Surgery, D-2300 Medical Center North, Vanderbilt University Medical Center, 1161 21st Avenue South, Nashville, Tennessee 37232-2730.
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Marincola Smith P, Choksi YA, Markham NO, Hanna DN, Zi J, Weaver CJ, Hamaamen JA, Lewis KB, Yang J, Liu Q, Kaji I, Means AL, Beauchamp RD. Colon epithelial cell TGFβ signaling modulates the expression of tight junction proteins and barrier function in mice. Am J Physiol Gastrointest Liver Physiol 2021; 320:G936-G957. [PMID: 33759564 PMCID: PMC8285585 DOI: 10.1152/ajpgi.00053.2021] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [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] [Indexed: 01/31/2023]
Abstract
Defective barrier function is a predisposing factor in inflammatory bowel disease (IBD) and colitis-associated cancer (CAC). Although TGFβ signaling defects have been associated with IBD and CAC, few studies have examined the relationship between TGFβ and intestinal barrier function. Here, we examine the role of TGFβ signaling via SMAD4 in modulation of colon barrier function. The Smad4 gene was conditionally deleted in the intestines of adult mice and intestinal permeability assessed using an in vivo 4 kDa FITC-Dextran (FD4) permeability assay. Mouse colon was isolated for gene expression (RNA-sequencing), Western blot, and immunofluorescence analysis. In vitro colon organoid culture was utilized to assess junction-related gene expression by qPCR and transepithelial resistance (TER). In silico analyses of human IBD and colon cancer databases were performed. Mice lacking intestinal expression of Smad4 demonstrate increased colonic permeability to FD4 without gross mucosal damage. mRNA/protein expression analyses demonstrate significant increases in Cldn2/Claudin 2 and Cldn8/Claudin 8, and decreases in Cldn3, Cldn4, and Cldn7/Claudin 7 with intestinal SMAD4 loss in vivo without changes in Claudin protein localization. TGFβ1/BMP2 treatment of polarized SMAD4+ colonoids increases TER. Cldn2, Cldn4, Cldn7, and Cldn8 are regulated by canonical TGFβ signaling, and TGFβ-dependent regulation of these genes is dependent on nascent RNA transcription (Cldn2, Cldn4, Cldn8) but not nascent protein translation (Cldn4, Cldn8). Human IBD/colon cancer specimens demonstrate decreased SMAD4, CLDN4, CLDN7, and CLDN8 and increased CLDN2 compared with healthy controls. Canonical TGFβ signaling modulates the expression of tight junction proteins and barrier function in mouse colon.NEW & NOTEWORTHY We demonstrate that canonical TGFβ family signaling modulates the expression of critical tight junction proteins in colon epithelial cells, and that expression of these tight junction proteins is associated with maintenance of colon epithelial barrier function in mice.
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Affiliation(s)
- Paula Marincola Smith
- 1Section of Surgical Sciences, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee,2Graduate Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Yash A. Choksi
- 3Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee,4Veterans Affairs Hospital, Tennessee Valley Healthcare System, Nashville, Tennessee
| | - Nicholas O. Markham
- 3Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee,5Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee,6Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - David N. Hanna
- 1Section of Surgical Sciences, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jinghuan Zi
- 1Section of Surgical Sciences, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Connie J. Weaver
- 1Section of Surgical Sciences, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jalal A. Hamaamen
- 1Section of Surgical Sciences, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Keeli B. Lewis
- 1Section of Surgical Sciences, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jing Yang
- 7Center for Quantitative Sciences, Vanderbilt University Medical Center, Nashville, Tennessee,8Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Qi Liu
- 7Center for Quantitative Sciences, Vanderbilt University Medical Center, Nashville, Tennessee,8Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Izumi Kaji
- 1Section of Surgical Sciences, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee,5Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Anna L. Means
- 1Section of Surgical Sciences, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee,2Graduate Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee,6Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee,9Vanderbilt Ingram Cancer Center, Vanderbilt University
Medical Center, Nashville, Tennessee,10Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - R. Daniel Beauchamp
- 1Section of Surgical Sciences, Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee,2Graduate Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee,5Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee,6Digestive Disease Research Center, Vanderbilt University Medical Center, Nashville, Tennessee,9Vanderbilt Ingram Cancer Center, Vanderbilt University
Medical Center, Nashville, Tennessee,10Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee
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Deng Y, McDonald OG, Means AL, Peek RM, Washington MK, Acra SA, Polk DB, Yan F. Exposure to p40 in Early Life Prevents Intestinal Inflammation in Adulthood Through Inducing a Long-Lasting Epigenetic Imprint on TGFβ. Cell Mol Gastroenterol Hepatol 2021; 11:1327-1345. [PMID: 33482393 PMCID: PMC8020481 DOI: 10.1016/j.jcmgh.2021.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND & AIMS Colonization by gut microbiota in early life confers beneficial effects on immunity throughout the host's lifespan. We sought to elucidate the mechanisms whereby neonatal supplementation with p40, a probiotic functional factor, reprograms intestinal epithelial cells for protection against adult-onset intestinal inflammation. METHODS p40 was used to treat young adult mouse colonic (YAMC) epithelial cells with and without deletion of a methyltransferase, su(var)3-9, enhancer-of-zeste and trithorax domain-containing 1β (Setd1β), and mice in early life or in adulthood. Anti-transforming growth factor β (TGFβ)-neutralizing antibodies were administered to adult mice with and without colitis induced by 2,4,6-trinitrobenzenesulfonic acid or dextran sulfate sodium. We examined Setd1b and Tgfb gene expression, TGFβ production, monomethylation and trimethylation of histone H3 on the lysine 4 residue (H3K4me1/3), H3K4me3 enrichment in Tgfb promoter, differentiation of regulatory T cells (Tregs), and the inflammatory status. RESULTS p40 up-regulated expression of Setd1b in YAMC cells. Accordingly, p40 enhanced H3K4me1/3 in YAMC cells in a Setd1β-dependent manner. p40-regulated Setd1β mediated programming the TGFβ locus into a transcriptionally permissive chromatin state and promoting TGFβ production in YAMC. Furthermore, transient exposure to p40 during the neonatal period and in adulthood resulted in the immediate increase in Tgfb gene expression. However, only neonatal p40 supplementation induced the sustained H3K4me1/3 and Tgfb gene expression that persisted into adulthood. Interfering with TGFβ function by neutralizing antibodies diminished the long-lasting effects of neonatal p40 supplementation on differentiation of Tregs and protection against colitis in adult mice. CONCLUSIONS Exposure to p40 in early life enables an epigenetic imprint on TGFβ, leading to long-lasting production of TGFβ by intestinal epithelial cells to expand Tregs and protect the gut against inflammation.
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Affiliation(s)
- Yilin Deng
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Oliver G McDonald
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee; Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Anna L Means
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee; Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Richard M Peek
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - M Kay Washington
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Sari A Acra
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - D Brent Polk
- Department of Pediatrics, Keck School of Medicine of University of Southern California, Los Angeles, California; Department of Biochemistry and Molecular Medicine, Keck School of Medicine of University of Southern California, Los Angeles, California; Division of Gastroenterology, Hepatology and Nutrition, Children's Hospital Los Angeles, Los Angeles, California
| | - Fang Yan
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee.
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Means AL. Repurposing Tuft Cells to Suppress Pancreatic Cancer. Cell Mol Gastroenterol Hepatol 2020; 11:659-660. [PMID: 33049247 PMCID: PMC7846484 DOI: 10.1016/j.jcmgh.2020.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 09/17/2020] [Indexed: 12/10/2022]
Affiliation(s)
- Anna L Means
- Departments of Surgery and of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee.
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9
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Bosma KJ, Rahim M, Singh K, Goleva SB, Wall ML, Xia J, Syring KE, Oeser JK, Poffenberger G, McGuinness OP, Means AL, Powers AC, Li WH, Davis LK, Young JD, O’Brien RM. Pancreatic islet beta cell-specific deletion of G6pc2 reduces fasting blood glucose. J Mol Endocrinol 2020; 64:235-248. [PMID: 32213654 PMCID: PMC7331801 DOI: 10.1530/jme-20-0031] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 03/13/2020] [Indexed: 12/25/2022]
Abstract
The G6PC1, G6PC2 and G6PC3 genes encode distinct glucose-6-phosphatase catalytic subunit (G6PC) isoforms. In mice, germline deletion of G6pc2 lowers fasting blood glucose (FBG) without affecting fasting plasma insulin (FPI) while, in isolated islets, glucose-6-phosphatase activity and glucose cycling are abolished and glucose-stimulated insulin secretion (GSIS) is enhanced at submaximal but not high glucose. These observations are all consistent with a model in which G6PC2 regulates the sensitivity of GSIS to glucose by opposing the action of glucokinase. G6PC2 is highly expressed in human and mouse islet beta cells however, various studies have shown trace G6PC2 expression in multiple tissues raising the possibility that G6PC2 also affects FBG through non-islet cell actions. Using real-time PCR we show here that expression of G6pc1 and/or G6pc3 are much greater than G6pc2 in peripheral tissues, whereas G6pc2 expression is much higher than G6pc3 in both pancreas and islets with G6pc1 expression not detected. In adult mice, beta cell-specific deletion of G6pc2 was sufficient to reduce FBG without changing FPI. In addition, electronic health record-derived phenotype analyses showed no association between G6PC2 expression and phenotypes clearly unrelated to islet function in humans. Finally, we show that germline G6pc2 deletion enhances glycolysis in mouse islets and that glucose cycling can also be detected in human islets. These observations are all consistent with a mechanism by which G6PC2 action in islets is sufficient to regulate the sensitivity of GSIS to glucose and hence influence FBG without affecting FPI.
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Affiliation(s)
- Karin J. Bosma
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Mohsin Rahim
- Department of Chemical and Biomolecular Engineering, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Kritika Singh
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Slavina B. Goleva
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Martha L. Wall
- Department of Chemical and Biomolecular Engineering, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Jing Xia
- Departments of Cell Biology and of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390-9039
| | - Kristen E. Syring
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - James K. Oeser
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Greg Poffenberger
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Owen P. McGuinness
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Anna L. Means
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Alvin C. Powers
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37232
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232
- VA Tennessee Valley Healthcare System, Nashville, TN 37232
| | - Wen-hong Li
- Departments of Cell Biology and of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390-9039
| | - Lea K. Davis
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37232
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Jamey D. Young
- Department of Chemical and Biomolecular Engineering, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Richard M. O’Brien
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37232
- To whom correspondence should be addressed: Department of Molecular Physiology and Biophysics, 8415 MRB IV, 2213 Garland Ave, Vanderbilt University Medical School, Nashville, TN 37232-0615,
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10
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Means AL. PYK2 at the Intersection of Signaling Pathways in Pancreatic Cancer. Cell Mol Gastroenterol Hepatol 2019; 8:651-652. [PMID: 31525324 PMCID: PMC6889775 DOI: 10.1016/j.jcmgh.2019.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/06/2019] [Accepted: 08/22/2019] [Indexed: 12/10/2022]
Affiliation(s)
- Anna L. Means
- Correspondence Address correspondence to: Anna L. Means, PhD, Vanderbilt University Medical Center, 1161 21st Avenue South, Medical Center North, D-2300, Nashville, Tennessee 37232-2730.
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11
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Shi C, Pan FC, Kim JN, Washington MK, Padmanabhan C, Meyer CT, Kopp JL, Sander M, Gannon M, Beauchamp RD, Wright CV, Means AL. Differential Cell Susceptibilities to Kras G12D in the Setting of Obstructive Chronic Pancreatitis. Cell Mol Gastroenterol Hepatol 2019; 8:579-594. [PMID: 31310834 PMCID: PMC6889613 DOI: 10.1016/j.jcmgh.2019.07.001] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 07/05/2019] [Accepted: 07/05/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Activating mutation of the KRAS gene is common in some cancers, such as pancreatic cancer, but rare in other cancers. Chronic pancreatitis is a predisposing condition for pancreatic ductal adenocarcinoma (PDAC), but how it synergizes with KRAS mutation is not known. METHODS We used a mouse model to express an activating mutation of Kras in conjunction with obstruction of the main pancreatic duct to recapitulate a common etiology of human chronic pancreatitis. Because the cell of origin of PDAC is not clear, Kras mutation was introduced into either duct cells or acinar cells. RESULTS Although KrasG12D expression in both cell types was protective against damage-associated cell death, chronic pancreatitis induced p53, p21, and growth arrest only in acinar-derived cells. Mutant duct cells did not elevate p53 or p21 expression and exhibited increased proliferation driving the appearance of PDAC over time. CONCLUSIONS One mechanism by which tissues may be susceptible or resistant to KRASG12D-initiated tumorigenesis is whether they undergo a p53-mediated damage response. In summary, we have uncovered a mechanism by which inflammation and intrinsic cellular programming synergize for the development of PDAC.
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Affiliation(s)
- Chanjuan Shi
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Fong Cheng Pan
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jessica N Kim
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - M Kay Washington
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Christian T Meyer
- Department of Biochemistry, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Janel L Kopp
- Departments of Pediatrics and Cellular and Molecular Medicine, University of California, San Diego, La Jolla, California
| | - Maike Sander
- Departments of Pediatrics and Cellular and Molecular Medicine, University of California, San Diego, La Jolla, California
| | - Maureen Gannon
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Veterans Affairs, Tennessee Valley Health System, Nashville, Tennessee
| | - R Daniel Beauchamp
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee; Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Christopher V Wright
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Anna L Means
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee; Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee.
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12
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Means AL. ATRX Links Chromatin Remodeling to Inflammation and Tumorigenesis in the Pancreas. Cell Mol Gastroenterol Hepatol 2018; 7:233-234. [PMID: 30539789 PMCID: PMC6282641 DOI: 10.1016/j.jcmgh.2018.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/02/2018] [Accepted: 10/02/2018] [Indexed: 12/10/2022]
Affiliation(s)
- Anna L. Means
- Correspondence Address correspondence to: Anna L. Means, PhD, Department of Surgery, Vanderbilt University Medical Center, D2300 Medical Center North, 1161 21st Avenue South, Nashville, Tennessee 37232-2730.
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13
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Choi E, Means AL, Coffey RJ, Goldenring JR. Active Kras Expression in Gastric Isthmal Progenitor Cells Induces Foveolar Hyperplasia but Not Metaplasia. Cell Mol Gastroenterol Hepatol 2018; 7:251-253.e1. [PMID: 30585163 PMCID: PMC6305842 DOI: 10.1016/j.jcmgh.2018.09.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 08/27/2018] [Accepted: 09/06/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Eunyoung Choi
- Nashville VA Medical Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Section of Surgical Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee; Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee.
| | - Anna L Means
- Section of Surgical Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee; Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Robert J Coffey
- Nashville VA Medical Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee; Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - James R Goldenring
- Nashville VA Medical Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Section of Surgical Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee; Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee; Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee.
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14
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Means AL, Freeman TJ, Zhu J, Woodbury LG, Marincola-Smith P, Wu C, Meyer AR, Weaver CJ, Padmanabhan C, An H, Zi J, Wessinger BC, Chaturvedi R, Brown TD, Deane NG, Coffey RJ, Wilson KT, Smith JJ, Sawyers CL, Goldenring JR, Novitskiy SV, Washington MK, Shi C, Beauchamp RD. Epithelial Smad4 Deletion Up-Regulates Inflammation and Promotes Inflammation-Associated Cancer. Cell Mol Gastroenterol Hepatol 2018; 6:257-276. [PMID: 30109253 PMCID: PMC6083016 DOI: 10.1016/j.jcmgh.2018.05.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 05/18/2018] [Indexed: 02/08/2023]
Abstract
Background & Aims Chronic inflammation is a predisposing condition for colorectal cancer. Many studies to date have focused on proinflammatory signaling pathways in the colon. Understanding the mechanisms that suppress inflammation, particularly in epithelial cells, is critical for developing therapeutic interventions. Here, we explored the roles of transforming growth factor β (TGFβ) family signaling through SMAD4 in colonic epithelial cells. Methods The Smad4 gene was deleted specifically in adult murine intestinal epithelium. Colitis was induced by 3 rounds of dextran sodium sulfate in drinking water, after which mice were observed for up to 3 months. Nontransformed mouse colonocyte cell lines and colonoid cultures and human colorectal cancer cell lines were analyzed for responses to TGFβ1 and bone morphogenetic protein 2. Results Dextran sodium sulfate treatment was sufficient to drive carcinogenesis in mice lacking colonic Smad4 expression, with resulting tumors bearing striking resemblance to human colitis-associated carcinoma. Loss of SMAD4 protein was observed in 48% of human colitis-associated carcinoma samples as compared with 19% of sporadic colorectal carcinomas. Loss of Smad4 increased the expression of inflammatory mediators within nontransformed mouse colon epithelial cells in vivo. In vitro analysis of mouse and human colonic epithelial cell lines and organoids indicated that much of this regulation was cell autonomous. Furthermore, TGFβ signaling inhibited the epithelial inflammatory response to proinflammatory cytokines. Conclusions TGFβ suppresses the expression of proinflammatory genes in the colon epithelium, and loss of its downstream mediator, SMAD4, is sufficient to initiate inflammation-driven colon cancer. Transcript profiling: GSE100082.
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Key Words
- AOM, azoxymethane
- APC, adenomatous polyposis coli
- BMP, bone morphogenetic protein
- CAC, colitis-associated carcinoma
- CCL20, Chemokine (C-C motif) ligand 20
- CRC, colorectal cancer
- CRISPR/Cas9, Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-associated protein 9
- Colitis-Associated Carcinoma
- DMEM, Dulbecco's modified Eagle medium
- DSS, dextran sodium sulfate
- FBS, fetal bovine serum
- FDR, false discovery rate
- GFP, green fluorescent protein
- HBSS, Hank's balanced salt solution
- IBD, inflammatory bowel disease
- IL, interleukin
- IMCS4fl/fl, immortalized mouse colonoctye cell line with loxP-flanked Smad4 alleles
- IMCS4null, immortalized mouse colonocyte cell line with deletion of the Smad4 alleles
- LPS, lipopolysaccharide
- PBS, phosphate-buffered saline
- PE, phycoerythrin
- R-SMAD, Receptor-SMAD
- SFG, retroviral vector
- STAT3, signal transducer and activator of transcription 3
- TGFβ
- TGFβ, transforming growth factor β
- TNF, tumor necrosis factor
- Tumor Necrosis Factor
- UC, ulcerative colitis
- WNT, wingless-type mouse mammary tumor virus integration site
- YAMC, young adult mouse colon epithelial cells
- mRNA, messenger RNA
- sgRNA, single-guide RNA
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Affiliation(s)
- Anna L. Means
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Tanner J. Freeman
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jing Zhu
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Luke G. Woodbury
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Chao Wu
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Anne R. Meyer
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Connie J. Weaver
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Hanbing An
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jinghuan Zi
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Bronson C. Wessinger
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Rupesh Chaturvedi
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Tasia D. Brown
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Natasha G. Deane
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Robert J. Coffey
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee
| | - Keith T. Wilson
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee
| | - J. Joshua Smith
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Charles L. Sawyers
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - James R. Goldenring
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee
| | - Sergey V. Novitskiy
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - M. Kay Washington
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Chanjuan Shi
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - R. Daniel Beauchamp
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
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15
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Erdogan B, Ao M, White LM, Means AL, Brewer BM, Yang L, Washington MK, Shi C, Franco OE, Weaver AM, Hayward SW, Li D, Webb DJ. Cancer-associated fibroblasts promote directional cancer cell migration by aligning fibronectin. J Cell Biol 2017; 216:3799-3816. [PMID: 29021221 PMCID: PMC5674895 DOI: 10.1083/jcb.201704053] [Citation(s) in RCA: 345] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 08/31/2017] [Accepted: 09/25/2017] [Indexed: 02/08/2023] Open
Abstract
Cancer-associated fibroblasts (CAFs) are major components of the carcinoma microenvironment that promote tumor progression. However, the mechanisms by which CAFs regulate cancer cell migration are poorly understood. In this study, we show that fibronectin (Fn) assembled by CAFs mediates CAF-cancer cell association and directional migration. Compared with normal fibroblasts, CAFs produce an Fn-rich extracellular matrix with anisotropic fiber orientation, which guides the cancer cells to migrate directionally. CAFs align the Fn matrix by increasing nonmuscle myosin II- and platelet-derived growth factor receptor α-mediated contractility and traction forces, which are transduced to Fn through α5β1 integrin. We further show that prostate cancer cells use αv integrin to migrate efficiently and directionally on CAF-derived matrices. We demonstrate that aligned Fn is a prominent feature of invasion sites in human prostatic and pancreatic carcinoma samples. Collectively, we present a new mechanism by which CAFs organize the Fn matrix and promote directional cancer cell migration.
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Affiliation(s)
- Begum Erdogan
- Department of Biological Sciences, Vanderbilt University, Nashville, TN
| | - Mingfang Ao
- Department of Biological Sciences, Vanderbilt University, Nashville, TN
| | - Lauren M White
- Department of Biological Sciences, Vanderbilt University, Nashville, TN
| | - Anna L Means
- Department of Surgery, Vanderbilt University, Nashville, TN
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN
| | - Bryson M Brewer
- Department of Mechanical Engineering, Vanderbilt University, Nashville, TN
| | - Lijie Yang
- Department of Mechanical Engineering, Vanderbilt University, Nashville, TN
| | - M Kay Washington
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN
| | - Chanjuan Shi
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN
| | - Omar E Franco
- Department of Urologic Surgery, Vanderbilt University, Nashville, TN
- Department of Surgery, NorthShore University HealthSystem, Evanston, IL
| | - Alissa M Weaver
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN
- Department of Cancer Biology, Vanderbilt University, Nashville, TN
| | - Simon W Hayward
- Department of Urologic Surgery, Vanderbilt University, Nashville, TN
- Department of Cancer Biology, Vanderbilt University, Nashville, TN
- Department of Surgery, NorthShore University HealthSystem, Evanston, IL
| | - Deyu Li
- Department of Mechanical Engineering, Vanderbilt University, Nashville, TN
| | - Donna J Webb
- Department of Biological Sciences, Vanderbilt University, Nashville, TN
- Department of Cancer Biology, Vanderbilt University, Nashville, TN
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16
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Padmanabhan C, Rellinger EJ, Zhu J, An H, Woodbury LG, Chung DH, Waterson AG, Lindsley CW, Means AL, Beauchamp RD. cFLIP critically modulates apoptotic resistance in epithelial-to-mesenchymal transition. Oncotarget 2017; 8:101072-101086. [PMID: 29254146 PMCID: PMC5731856 DOI: 10.18632/oncotarget.19557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 06/26/2017] [Indexed: 12/30/2022] Open
Abstract
Epithelial cancers (carcinomas) comprise the top four causes of cancer-related deaths in the United States. While overall survival has been steadily improving, therapy-resistant disease continues to present a major therapeutic challenge. Carcinomas often exploit the normal developmental program, epithelial-to-mesenchymal transition (EMT), to gain a mesenchymal phenotype associated with increased invasiveness and resistance to apoptosis. We have previously shown that an isoxazole-based small molecule, ML327, partially reverses TGF-β-induced EMT in an immortalized mouse mammary epithelial cell line. Herein, we demonstrate that ML327 reverses much of the EMT gene expression program in cultured carcinoma cell lines. The reversal of EMT sensitizes these cancer cells to the apoptosis-inducing ligand TRAIL. This sensitization is independent of E-cadherin expression and rather relies on the downregulation of a major anti-apoptotic protein, cFLIPS. Loss of cFLIPS is sufficient to overcome resistance to TRAIL and exogenous overexpression of cFLIPS restores resistance to TRAIL-induced apoptosis despite EMT reversal with ML327. In summary, we have utilized an isoxazole-based small molecule that partially reverses EMT in carcinoma cells to demonstrate that cFLIPS critically regulates the apoptosis resistance phenotype associated with EMT.
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Affiliation(s)
- Chandrasekhar Padmanabhan
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Department of Surgery, Vanderbilt University Medical Center, Nashville TN, 37232, USA
| | - Eric J Rellinger
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Department of Surgery, Vanderbilt University Medical Center, Nashville TN, 37232, USA
| | - Jing Zhu
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Department of Surgery, Vanderbilt University Medical Center, Nashville TN, 37232, USA
| | - Hanbing An
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Department of Surgery, Vanderbilt University Medical Center, Nashville TN, 37232, USA
| | - Luke G Woodbury
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville TN, 37232, USA
| | - Dai H Chung
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Department of Pediatric Surgery, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville TN 37232, USA
| | - Alex G Waterson
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville TN, 37232, USA
| | - Craig W Lindsley
- Vanderbilt Center for Neuroscience Drug Discovery, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville TN, 37232, USA
| | - Anna L Means
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Department of Surgery, Vanderbilt University Medical Center, Nashville TN, 37232, USA
| | - R Daniel Beauchamp
- Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Department of Surgery, Vanderbilt University Medical Center, Nashville TN, 37232, USA.,Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville TN 37232, USA.,Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville TN, 37232, USA.,The Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville TN, 37232, USA
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17
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Gaskill CF, Carrier EJ, Kropski JA, Bloodworth NC, Menon S, Foronjy RF, Taketo MM, Hong CC, Austin ED, West JD, Means AL, Loyd JE, Merryman WD, Hemnes AR, De Langhe S, Blackwell TS, Klemm DJ, Majka SM. Disruption of lineage specification in adult pulmonary mesenchymal progenitor cells promotes microvascular dysfunction. J Clin Invest 2017; 127:2262-2276. [PMID: 28463231 DOI: 10.1172/jci88629] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 03/02/2017] [Indexed: 01/04/2023] Open
Abstract
Pulmonary vascular disease is characterized by remodeling and loss of microvessels and is typically attributed to pathological responses in vascular endothelium or abnormal smooth muscle cell phenotypes. We have challenged this understanding by defining an adult pulmonary mesenchymal progenitor cell (MPC) that regulates both microvascular function and angiogenesis. The current understanding of adult MPCs and their roles in homeostasis versus disease has been limited by a lack of genetic markers with which to lineage label multipotent mesenchyme and trace the differentiation of these MPCs into vascular lineages. Here, we have shown that lineage-labeled lung MPCs expressing the ATP-binding cassette protein ABCG2 (ABCG2+) are pericyte progenitors that participate in microvascular homeostasis as well as adaptive angiogenesis. Activation of Wnt/β-catenin signaling, either autonomously or downstream of decreased BMP receptor signaling, enhanced ABCG2+ MPC proliferation but suppressed MPC differentiation into a functional pericyte lineage. Thus, enhanced Wnt/β-catenin signaling in ABCG2+ MPCs drives a phenotype of persistent microvascular dysfunction, abnormal angiogenesis, and subsequent exacerbation of bleomycin-induced fibrosis. ABCG2+ MPCs may, therefore, account in part for the aberrant microvessel function and remodeling that are associated with chronic lung diseases.
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Affiliation(s)
- Christa F Gaskill
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - Erica J Carrier
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - Jonathan A Kropski
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | | | - Swapna Menon
- Pulmonary Vascular Research Institute, Kochi, and AnalyzeDat Consulting Services, Kerala, India
| | - Robert F Foronjy
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, SUNY Downstate Medical Center, Brooklyn, New York, USA
| | | | - Charles C Hong
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA.,Department of Pathology and Laboratory Medicine or Department of Medicine, Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | | | - James D West
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - Anna L Means
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - James E Loyd
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - W David Merryman
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee USA
| | - Anna R Hemnes
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | | | - Timothy S Blackwell
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA
| | - Dwight J Klemm
- Department of Medicine, Pulmonary and Critical Care Medicine, Gates Center for Regenerative Medicine and Stem Cell Biology, University of Colorado, Aurora, Colorado, USA.,Geriatric Research Education and Clinical Center, Eastern Colorado Health Care System, Denver, Colorado, USA
| | - Susan M Majka
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine or Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee USA.,Vanderbilt Center for Stem Cell Biology, Vanderbilt University, Nashville, Tennessee, USA
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Means AL, Freeman TJ, Weaver CJ, Shi C, Washington MK, Wessinger BC, Brown T, Flaherty DK, Weller KP, Coffey RJ, Wilson KT, Beauchamp RD. Abstract A16: Smad4 pathways modulate induction of the chemokine Ccl20 and repress inflammation-induced carcinogenesis in mouse colon. Cancer Res 2017. [DOI: 10.1158/1538-7445.crc16-a16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Inflammation regulates many aspects of gut homeostasis but is also a key component of colon cancer progression. While TGFβ signaling is known to regulate inflammatory responses within immune cells, we have uncovered a novel regulatory pathway in which TGFβ and BMP signaling suppress responses to inflammatory stimuli within the colonic epithelium. Using mice with conditional deletion of Smad4 in intestinal epithelium, we found that CCL20 expression was increased with Smad4 loss. Similarly, in murine immortalized colonocytes and human colon cancer cell lines, blocking TGFβ and/or BMP receptors increased CCL20 expression. CCL20 is upregulated in response to inflammatory signals such as TNF and IL-1β. CCL20 is also upregulated in colon cancer but the mechanism is not understood. We found that pre-treatment of colonocytes or colon cancer cells with TGFβ1 and BMP2 completely suppressed TNF- or IL-1β-induced CCL20 expression at the level of gene transcription. By chromatin immunoprecipitation, we found that TGFβ1/BMP2 treatment impaired binding of NFκB and phospho-STAT3 to the CCL20 promoter. To understand the significance of this regulation in chronic inflammation, we subjected Smad4 deleted and control mice to three rounds of dextran sodium sulfate (DSS)-mediated damage to the distal colon. We found that loss of Smad4 in mouse colonic epithelium was sufficient to induce tumorigenesis following damage-induced inflammation. Following DSS-mediated damage, Smad4-null epithelium developed invasive colorectal adenocarcinoma within two months of DSS treatment while Smad4+ control mice never develop tumors following DSS exposure. The Smad4 null tumors were histologically similar to those of human colitis-associated colon cancers. Prior to tumor formation, we saw an increase in CD8+ cells in Smad4-deleted colons, suggesting that tumor progression involves bidirectional crosstalk between the epithelium and immune cells and that this crosstalk is regulated in part by Smad4-mediated signaling within the epithelium. SMAD4, TGFβ receptors, or BMP receptors are often mutated in colon cancer. This loss of TGFβ and/or BMP signaling likely facilitates epithelial-immune cell crosstalk in colitis-associated colon cancers.
Citation Format: Anna L. Means, Tanner J. Freeman, Connie J. Weaver, Chanjuan Shi, Mary K. Washington, Bronson C. Wessinger, Tasia Brown, David K. Flaherty, Kevin P. Weller, Robert J. Coffey, Keith T. Wilson, Robert D. Beauchamp. Smad4 pathways modulate induction of the chemokine Ccl20 and repress inflammation-induced carcinogenesis in mouse colon. [abstract]. In: Proceedings of the AACR Special Conference on Colorectal Cancer: From Initiation to Outcomes; 2016 Sep 17-20; Tampa, FL. Philadelphia (PA): AACR; Cancer Res 2017;77(3 Suppl):Abstract nr A16.
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Affiliation(s)
| | | | | | - Chanjuan Shi
- Vanderbilt University Medical Center, Nashville, TN
| | | | | | - Tasia Brown
- Vanderbilt University Medical Center, Nashville, TN
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Pan FC, Kim JN, Shi C, Washington MK, Sander M, Gannon M, Beauchamp RD, Wright CV, Means AL. Abstract B19: Kras mutation imparts neoplastic potential on duct cells but not acinar cells in a mouse model of obstructive chronic pancreatitis. Cancer Res 2016. [DOI: 10.1158/1538-7445.panca16-b19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Understanding the progression of human pancreatic cancer is difficult due to the late stage of diagnosis of this deadly disease. We must therefore rely upon robust model systems to understand how pancreatic cancer arises, how its acute and chronic phases of progression are regulated, and how best to identify and treat it, hopefully still in the early stage. Models of pancreatic ductal adenocarcinoma (PDAC) that accurately reflect human disease are still being developed. To mimic human disease, PDAC must arise from mutations occurring in adult animals and with etiologies relevant to humans. We developed a new mouse model that incorporates obstructive chronic pancreatitis with tissue-specific, adult-onset expression of mutant Kras. We found that KrasG12D expression in duct cells but not in acinar cells led to progression of metaplastic ducts to eventual dysplasia and cancer. In early-stage disease, Kras mutation in acinar cells led to increased acinar-to-ductal metaplasia but did not downregulate p53, thus leading to reduced cell survival. Ducts naturally express much lower p53 levels, however, and there was increased survival of KrasG12D-mediated, duct-derived metaplastic cells. Furthermore, acinar cells upregulated Pdx1 during acinar-to-ductal metaplasia while duct cells did not do so during their metaplastic transition. Without chronic pancreatitis, Kras mutation in acinar cells causes abundant Pancreatic Intraepithelial Neoplasm (PanIN)-like lesions. However, overexpression of Pdx1 in acinar cells in this context permitted acinar-to-ductal metaplasia but prevented PanIN-like lesion formation, suggesting that Pdx1 can repress neoplastic progression. In summary, in the setting of obstructive chronic pancreatitis, ducts are the principal source of cancer development via reduced Pdx1 and p53 levels and increased cell survival.
Citation Format: Fong C. Pan, Jessica N. Kim, Chanjuan Shi, Mary K. Washington, Maike Sander, Maureen Gannon, Robert D. Beauchamp, Christopher V. Wright, Anna L. Means.{Authors}. Kras mutation imparts neoplastic potential on duct cells but not acinar cells in a mouse model of obstructive chronic pancreatitis. [abstract]. In: Proceedings of the AACR Special Conference on Pancreatic Cancer: Advances in Science and Clinical Care; 2016 May 12-15; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2016;76(24 Suppl):Abstract nr B19.
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Affiliation(s)
- Fong C. Pan
- 1Vanderbilt University Medical Center, Nashville, TN,
| | | | - Chanjuan Shi
- 1Vanderbilt University Medical Center, Nashville, TN,
| | | | - Maike Sander
- 2University of California, San Diego, La Jolla, CA
| | | | | | | | - Anna L. Means
- 1Vanderbilt University Medical Center, Nashville, TN,
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Drosos Y, Neale G, Ye J, Paul L, Kuliyev E, Maitra A, Means AL, Washington MK, Rehg J, Finkelstein DB, Sosa-Pineda B. Prox1-Heterozygosis Sensitizes the Pancreas to Oncogenic Kras-Induced Neoplastic Transformation. Neoplasia 2016; 18:172-84. [PMID: 26992918 PMCID: PMC4796801 DOI: 10.1016/j.neo.2016.02.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 01/29/2016] [Accepted: 02/09/2016] [Indexed: 12/15/2022] Open
Abstract
The current paradigm of pancreatic neoplastic transformation proposes an initial step whereby acinar cells convert into acinar-to-ductal metaplasias, followed by progression of these lesions into neoplasias under sustained oncogenic activity and inflammation. Understanding the molecular mechanisms driving these processes is crucial to the early diagnostic and prevention of pancreatic cancer. Emerging evidence indicates that transcription factors that control exocrine pancreatic development could have either, protective or facilitating roles in the formation of preneoplasias and neoplasias in the pancreas. We previously identified that the homeodomain transcription factor Prox1 is a novel regulator of mouse exocrine pancreas development. Here we investigated whether Prox1 function participates in early neoplastic transformation using in vivo, in vitro and in silico approaches. We found that Prox1 expression is transiently re-activated in acinar cells undergoing dedifferentiation and acinar-to-ductal metaplastic conversion. In contrast, Prox1 expression is largely absent in neoplasias and tumors in the pancreas of mice and humans. We also uncovered that Prox1-heterozygosis markedly increases the formation of acinar-to-ductal-metaplasias and early neoplasias, and enhances features associated with inflammation, in mouse pancreatic tissues expressing oncogenic Kras. Furthermore, we discovered that Prox1-heterozygosis increases tissue damage and delays recovery from inflammation in pancreata of mice injected with caerulein. These results are the first demonstration that Prox1 activity protects pancreatic cells from acute tissue damage and early neoplastic transformation. Additional data in our study indicate that this novel role of Prox1 involves suppression of pathways associated with inflammatory responses and cell invasiveness.
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Affiliation(s)
- Yiannis Drosos
- Department of Genetics, St. Jude Children's Research Hospital, Memphis, TN
| | - Geoffrey Neale
- Department of Hartwell Center for Bioinformatics and Biotechnology, St. Jude Children's Research Hospital, Memphis, TN
| | - Jianming Ye
- Department of Genetics, St. Jude Children's Research Hospital, Memphis, TN
| | - Leena Paul
- Department of Genetics, St. Jude Children's Research Hospital, Memphis, TN
| | - Emin Kuliyev
- Department of Genetics, St. Jude Children's Research Hospital, Memphis, TN
| | - Anirban Maitra
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Anna L Means
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN
| | - M Kay Washington
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN
| | - Jerold Rehg
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - David B Finkelstein
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN
| | - Beatriz Sosa-Pineda
- Department of Genetics, St. Jude Children's Research Hospital, Memphis, TN; Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL.
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21
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Affiliation(s)
- Anna L Means
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee.
| | - Craig D Logsdon
- Department of Cancer Biology, University of Texas, MD Anderson Cancer Center, Houston, Texas
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22
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Shi C, Washington MK, Chaturvedi R, Drosos Y, Revetta FL, Weaver CJ, Buzhardt E, Yull FE, Blackwell TS, Sosa-Pineda B, Whitehead RH, Beauchamp RD, Wilson KT, Means AL. Fibrogenesis in pancreatic cancer is a dynamic process regulated by macrophage-stellate cell interaction. J Transl Med 2014; 94:409-21. [PMID: 24535260 PMCID: PMC3992484 DOI: 10.1038/labinvest.2014.10] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 01/15/2014] [Indexed: 12/31/2022] Open
Abstract
Pancreatic cancer occurs in the setting of a profound fibrotic microenvironment that often dwarfs the actual tumor. Although pancreatic fibrosis has been well studied in chronic pancreatitis, its development in pancreatic cancer is much less well understood. This article describes the dynamic remodeling that occurs from pancreatic precursors (pancreatic intraepithelial neoplasias (PanINs)) to pancreatic ductal adenocarcinoma, highlighting similarities and differences between benign and malignant disease. Although collagen matrix is a commonality throughout this process, early stage PanINs are virtually free of periostin while late stage PanIN and pancreatic cancer are surrounded by an increasing abundance of this extracellular matrix protein. Myofibroblasts also become increasingly abundant during progression from PanIN to cancer. From the earliest stages of fibrogenesis, macrophages are associated with this ongoing process. In vitro co-culture indicates there is cross-regulation between macrophages and pancreatic stellate cells (PaSCs), precursors to at least some of the fibrotic cell populations. When quiescent PaSCs were co-cultured with macrophage cell lines, the stellate cells became activated and the macrophages increased cytokine production. In summary, fibrosis in pancreatic cancer involves a complex interplay of cells and matrices that regulate not only the tumor epithelium but the composition of the microenvironment itself.
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Affiliation(s)
- Chanjuan Shi
- Dept. of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville TN
| | - M. Kay Washington
- Dept. of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville TN
| | | | - Yiannis Drosos
- Dept. of Genetics, St. Jude Children’s Research Hospital, Memphis, TN
| | - Frank L. Revetta
- Dept. of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville TN
| | | | | | - Fiona E. Yull
- Dept. of Cancer Biology, Vanderbilt University, Nashville TN
| | | | | | | | - R. Daniel Beauchamp
- Dept. of Surgery, Vanderbilt University, Nashville TN,Dept. of Cell and Developmental Biology, Vanderbilt University, Nashville TN
| | - Keith T. Wilson
- Dept. of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville TN,Dept. of Medicine, Vanderbilt University, Nashville TN,Dept. of Cancer Biology, Vanderbilt University, Nashville TN,Veterans Affairs Tennessee Valley Healthcare System, Nashville TN
| | - Anna L. Means
- Dept. of Surgery, Vanderbilt University, Nashville TN,Dept. of Cell and Developmental Biology, Vanderbilt University, Nashville TN
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23
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Al-Greene NT, Means AL, Lu P, Jiang A, Schmidt CR, Chakravarthy AB, Merchant NB, Washington MK, Zhang B, Shyr Y, Deane NG, Beauchamp RD. Four jointed box 1 promotes angiogenesis and is associated with poor patient survival in colorectal carcinoma. PLoS One 2013; 8:e69660. [PMID: 23922772 PMCID: PMC3726759 DOI: 10.1371/journal.pone.0069660] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 06/11/2013] [Indexed: 01/08/2023] Open
Abstract
Angiogenesis, the recruitment and re-configuration of pre-existing vasculature, is essential for tumor growth and metastasis. Increased tumor vascularization often correlates with poor patient outcomes in a broad spectrum of carcinomas. We identified four jointed box 1 (FJX1) as a candidate regulator of tumor angiogenesis in colorectal cancer. FJX1 mRNA and protein are upregulated in human colorectal tumor epithelium as compared with normal epithelium and colorectal adenomas, and high expression of FJX1 is associated with poor patient prognosis. FJX1 mRNA expression in colorectal cancer tissues is significantly correlated with changes in known angiogenesis genes. Augmented expression of FJX1 in colon cancer cells promotes growth of xenografts in athymic mice and is associated with increased tumor cell proliferation and vascularization. Furthermore, FJX1 null mice develop significantly fewer colonic polyps than wild-type littermates after combined dextran sodium sulfate (DSS) and azoxymethane (AOM) treatment. In vitro, conditioned media from FJX1 expressing cells promoted endothelial cell capillary tube formation in a HIF1-α dependent manner. Taken together our results support the conclusion that FJX1 is a novel regulator of tumor progression, due in part, to its effect on tumor vascularization.
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Affiliation(s)
- Nicole T. Al-Greene
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Anna L. Means
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Pengcheng Lu
- Department of Biostatistics, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Aixiang Jiang
- Department of Biostatistics, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Carl R. Schmidt
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
| | - A. Bapsi Chakravarthy
- Department of Radiation Oncology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Nipun B. Merchant
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee, United States of America
| | - M. Kay Washington
- Department of Pathology, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Bing Zhang
- Department of Biomedical Informatics, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Yu Shyr
- Department of Biostatistics, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Natasha G. Deane
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, Tennessee, United States of America
| | - R. Daniel Beauchamp
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- * E-mail:
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24
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25
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Powell AE, Wang Y, Li Y, Poulin EJ, Means AL, Washington MK, Higginbotham JN, Juchheim A, Prasad N, Levy SE, Guo Y, Shyr Y, Aronow BJ, Haigis KM, Franklin JL, Coffey RJ. The pan-ErbB negative regulator Lrig1 is an intestinal stem cell marker that functions as a tumor suppressor. Cell 2012; 149:146-58. [PMID: 22464327 PMCID: PMC3563328 DOI: 10.1016/j.cell.2012.02.042] [Citation(s) in RCA: 516] [Impact Index Per Article: 43.0] [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: 06/30/2011] [Revised: 01/12/2012] [Accepted: 02/01/2012] [Indexed: 12/20/2022]
Abstract
Lineage mapping has identified both proliferative and quiescent intestinal stem cells, but the molecular circuitry controlling stem cell quiescence is incompletely understood. By lineage mapping, we show Lrig1, a pan-ErbB inhibitor, marks predominately noncycling, long-lived stem cells that are located at the crypt base and that, upon injury, proliferate and divide to replenish damaged crypts. Transcriptome profiling of Lrig1(+) colonic stem cells differs markedly from the profiling of highly proliferative, Lgr5(+) colonic stem cells; genes upregulated in the Lrig1(+) population include those involved in cell cycle repression and response to oxidative damage. Loss of Apc in Lrig1(+) cells leads to intestinal adenomas, and genetic ablation of Lrig1 results in heightened ErbB1-3 expression and duodenal adenomas. These results shed light on the relationship between proliferative and quiescent intestinal stem cells and support a model in which intestinal stem cell quiescence is maintained by calibrated ErbB signaling with loss of a negative regulator predisposing to neoplasia.
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Affiliation(s)
- Anne E. Powell
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Yang Wang
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Yina Li
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Emily J. Poulin
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Anna L. Means
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Mary K. Washington
- Department of Pathology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - James N. Higginbotham
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Alwin Juchheim
- Molecular Pathology Unit, Massachusetts General Hospital and Department of Pathology, Harvard Medical School, Charlestown, MA 02129, USA
| | - Nripesh Prasad
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, 35806
| | - Shawn E. Levy
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, 35806
| | - Yan Guo
- Department of Biostatistics, Vanderbilt University, Nashville, TN, 37232
| | - Yu Shyr
- Department of Biostatistics, Vanderbilt University, Nashville, TN, 37232
| | - Bruce J. Aronow
- Departments of Biomedical Informatics and Developmental Biology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Kevin M. Haigis
- Molecular Pathology Unit, Massachusetts General Hospital and Department of Pathology, Harvard Medical School, Charlestown, MA 02129, USA
| | - Jeffrey L. Franklin
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Robert J. Coffey
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Department of Veterans Affairs Medical Center, Nashville, TN 37232, USA
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Correspondence:
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26
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Westmoreland JJ, Drosos Y, Kelly J, Ye J, Means AL, Washington MK, Sosa-Pineda B. Dynamic distribution of claudin proteins in pancreatic epithelia undergoing morphogenesis or neoplastic transformation. Dev Dyn 2012; 241:583-94. [PMID: 22275141 PMCID: PMC3288608 DOI: 10.1002/dvdy.23740] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [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] [Accepted: 01/02/2012] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The assembly of distinct proteins into tight junctions results in the formation of a continuous barrier that regulates the paracellular flux of water, ions, and small molecules across epithelia. The claudin protein family encompasses numerous major structural components of tight junctions. These proteins specify the permeability characteristics of tight junctions and consequently, some of the physiological properties of epithelia. Furthermore, defective claudin expression has been found to correlate with some diseases, tumor progression, and defective morphogenesis. Investigating the pattern of claudin expression during embryogenesis or in certain pathological conditions is necessary to begin disclosing the role of these proteins in health and disease. RESULTS This study analyzed the expression of several claudins during mouse pancreas organogenesis and in pancreatic intraepithelial neoplasias of mouse and human origin. CONCLUSIONS Our results underscored a distinctive, dynamic distribution of certain claudins in both the developing pancreas and the pancreatic epithelium undergoing neoplastic transformation.
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Affiliation(s)
| | - Yiannis Drosos
- Department of Genetics, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Jacqueline Kelly
- Department of Genetics, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Jianming Ye
- Department of Genetics, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Anna L. Means
- Departments of Surgery and Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | | | - Beatriz Sosa-Pineda
- Department of Genetics, St. Jude Children’s Research Hospital, Memphis, TN, USA
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27
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Freeman TJ, Smith JJ, Chen X, Washington MK, Roland JT, Means AL, Eschrich SA, Yeatman TJ, Deane NG, Beauchamp RD. Smad4-mediated signaling inhibits intestinal neoplasia by inhibiting expression of β-catenin. Gastroenterology 2012; 142:562-571.e2. [PMID: 22115830 PMCID: PMC3343368 DOI: 10.1053/j.gastro.2011.11.026] [Citation(s) in RCA: 139] [Impact Index Per Article: 11.6] [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: 10/18/2011] [Revised: 11/08/2011] [Accepted: 11/15/2011] [Indexed: 12/21/2022]
Abstract
BACKGROUND & AIMS Mutational inactivation of adenomatous polyposis coli (APC) is an early event in colorectal cancer (CRC) progression that affects the stability and increases the activity of β-catenin, a mediator of Wnt signaling. Progression of CRC also involves inactivation of signaling via transforming growth factor β and bone morphogenetic protein (BMP), which are tumor suppressors. However, the interactions between these pathways are not clear. We investigated the effects of loss of the transcription factor Smad4 on levels of β-catenin messenger RNA (mRNA) and Wnt signaling. METHODS We used microarray analysis to associate levels of Smad4 and β-catenin mRNA in colorectal tumor samples from 250 patients. We performed oligonucleotide-mediated knockdown of Smad4 in human embryonic kidney (HEK293T) and in HCT116 colon cancer cells and transgenically expressed Smad4 in SW480 colon cancer cells. We analyzed adenomas from (APC(Δ1638/+)) and (APC(Δ1638/+)) × (K19Cre(ERT2)Smad4(lox/lox)) mice by using laser capture microdissection. RESULTS In human CRC samples, reduced levels of Smad4 correlated with increased levels of β-catenin mRNA. In Smad4-depleted cell lines, levels of β-catenin mRNA and Wnt signaling increased. Inhibition of BMP or depletion of Smad4 in HEK293T cells increased binding of RNA polymerase II to the β-catenin gene. Expression of Smad4 in SW480 cells reduced Wnt signaling and levels of β-catenin mRNA. In mice with heterozygous disruption of Apc(APC(Δ1638/+)), Smad4-deficient intestinal adenomas had increased levels of β-catenin mRNA and expression of Wnt target genes compared with adenomas from APC(Δ1638/+) mice that expressed Smad4. CONCLUSIONS Transcription of β-catenin is inhibited by BMP signaling to Smad4. These findings provide important information about the interaction among transforming growth factor β, BMP, and Wnt signaling pathways in progression of CRC.
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Affiliation(s)
- Tanner J. Freeman
- Department of Surgery, Vanderbilt University Medical Center (VUMC, Nashville, TN),Department of Cell and Developmental Biology, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt Medical Scientist Training Program, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt University School of Medicine, Vanderbilt University Medical Center (VUMC, Nashville, TN)
| | - J. Joshua Smith
- Department of Surgery, Vanderbilt University Medical Center (VUMC, Nashville, TN),Department of Cell and Developmental Biology, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt Medical Scientist Training Program, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt University School of Medicine, Vanderbilt University Medical Center (VUMC, Nashville, TN)
| | - Xi Chen
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center (VUMC, Nashville, TN),Department of Biostatistics, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt University School of Medicine, Vanderbilt University Medical Center (VUMC, Nashville, TN)
| | - M. Kay Washington
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt University School of Medicine, Vanderbilt University Medical Center (VUMC, Nashville, TN)
| | - Joseph T. Roland
- Vanderbilt University School of Medicine, Vanderbilt University Medical Center (VUMC, Nashville, TN)
| | - Anna L. Means
- Department of Surgery, Vanderbilt University Medical Center (VUMC, Nashville, TN),Department of Cell and Developmental Biology, Vanderbilt University Medical Center (VUMC, Nashville, TN),Epithelial Biology Center, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt University School of Medicine, Vanderbilt University Medical Center (VUMC, Nashville, TN)
| | - Steven A. Eschrich
- H. Lee Moffitt Cancer Center (MCC) and Research Institute, 123902 Magnolia Avenue, Tampa, FL 33612
| | - Timothy J. Yeatman
- H. Lee Moffitt Cancer Center (MCC) and Research Institute, 123902 Magnolia Avenue, Tampa, FL 33612
| | - Natasha G. Deane
- Department of Surgery, Vanderbilt University Medical Center (VUMC, Nashville, TN),Department of Radiology and the Vanderbilt University Institute of Imaging Sciences, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt University School of Medicine, Vanderbilt University Medical Center (VUMC, Nashville, TN)
| | - R. Daniel Beauchamp
- Department of Surgery, Vanderbilt University Medical Center (VUMC, Nashville, TN),Department of Cell and Developmental Biology, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center (VUMC, Nashville, TN),Department of Cancer Biology, Vanderbilt University Medical Center (VUMC, Nashville, TN),Vanderbilt University School of Medicine, Vanderbilt University Medical Center (VUMC, Nashville, TN)
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28
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Vanderpool C, Sparks EE, Huppert KA, Gannon M, Means AL, Huppert SS. Genetic interactions between hepatocyte nuclear factor-6 and Notch signaling regulate mouse intrahepatic bile duct development in vivo. Hepatology 2012; 55:233-43. [PMID: 21898486 PMCID: PMC3235248 DOI: 10.1002/hep.24631] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [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] [Indexed: 12/07/2022]
Abstract
UNLABELLED Notch signaling and hepatocyte nuclear factor-6 (HNF-6) are two genetic factors known to affect lineage commitment in the bipotential hepatoblast progenitor cell (BHPC) population. A genetic interaction involving Notch signaling and HNF-6 in mice has been inferred through separate experiments showing that both affect BHPC specification and bile duct morphogenesis. To define the genetic interaction between HNF-6 and Notch signaling in an in vivo mouse model, we examined the effects of BHPC-specific loss of HNF-6 alone and within the background of BHPC-specific loss of recombination signal binding protein immunoglobulin kappa J (RBP-J), the common DNA-binding partner of all Notch receptors. Isolated loss of HNF-6 in this mouse model fails to demonstrate a phenotypic variance in bile duct development compared to control. However, when HNF-6 loss is combined with RBP-J loss, a phenotype consisting of cholestasis, hepatic necrosis, and fibrosis is observed that is more severe than the phenotype seen with Notch signaling loss alone. This phenotype is associated with significant intrahepatic biliary system abnormalities, including an early decrease in biliary epithelial cells, evolving to ductular proliferation and a decrease in the density of communicating peripheral bile duct branches. In this in vivo model, simultaneous loss of both HNF-6 and RBP-J results in down-regulation of both HNF-1β and Sox9 (sex determining region Y-related HMG box transcription factor 9). CONCLUSION HNF-6 and Notch signaling interact in vivo to control expression of downstream mediators essential to the normal development of the intrahepatic biliary system. This study provides a model to investigate genetic interactions of factors important to intrahepatic bile duct development and their effect on cholestatic liver disease phenotypes.
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Affiliation(s)
- Charles Vanderpool
- Department of Pediatrics, D. Brent Polk Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Erin E. Sparks
- Department of Cell and Developmental Biology and Center for Stem Cell Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Kari A. Huppert
- Department of Cell and Developmental Biology and Center for Stem Cell Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Maureen Gannon
- Department of Medicine and Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Anna L. Means
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Stacey S. Huppert
- Department of Cell and Developmental Biology and Center for Stem Cell Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
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Ray KC, Bell KM, Yan J, Gu G, Chung CH, Washington MK, Means AL. Epithelial tissues have varying degrees of susceptibility to Kras(G12D)-initiated tumorigenesis in a mouse model. PLoS One 2011; 6:e16786. [PMID: 21311774 PMCID: PMC3032792 DOI: 10.1371/journal.pone.0016786] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Accepted: 01/11/2011] [Indexed: 02/06/2023] Open
Abstract
Activating mutations in the Kras gene are commonly found in some but not all epithelial cancers. In order to understand the susceptibility of different epithelial tissues to Kras-induced tumorigenesis, we introduced one of the most common Kras mutations, KrasG12D, broadly in epithelial tissues. We used a mouse model in which the G12D mutation is placed in the endogenous Kras locus controlled by inducible, Cre-mediated recombination in tissues expressing cytokeratin 19 including the oral cavity, GI tract, lungs, and ducts of the liver, kidney, and the pancreas. Introduction of the KrasG12D mutation in adult mouse tissues led to neoplastic changes in some but not all of these tissues. Notably, many hyperplasias, metaplasias and adenomas were observed in the oral cavity, stomach, colon and lungs, suggesting that exposure to products of the outside environment promotes KrasG12D-initiated tumorigenesis. However, environmental exposure did not consistently correlate with tumor formation, such as in the small intestine, suggesting that there are also intrinsic differences in susceptibility to Kras activation. The pancreas developed small numbers of mucinous metaplasias with characteristics of early stage pancreatic intraepithelial neoplasms (PanINs), supporting the hypothesis that pancreatic ducts have the potential to give rise pancreatic cancer.
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Affiliation(s)
- Kevin C Ray
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
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Blaine SA, Ray KC, Anunobi R, Gannon MA, Washington MK, Means AL. Adult pancreatic acinar cells give rise to ducts but not endocrine cells in response to growth factor signaling. Development 2010; 137:2289-96. [PMID: 20534672 PMCID: PMC2889602 DOI: 10.1242/dev.048421] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [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] [Accepted: 05/14/2010] [Indexed: 12/26/2022]
Abstract
Studies in both humans and rodents have found that insulin(+) cells appear within or near ducts of the adult pancreas, particularly following damage or disease, suggesting that these insulin(+) cells arise de novo from ductal epithelium. We have found that insulin(+) cells are continuous with duct cells in the epithelium that makes up the hyperplastic ducts of both chronic pancreatitis and pancreatic cancer in humans. Therefore, we tested the hypothesis that both hyperplastic ductal cells and their associated insulin(+) cells arise from the same cell of origin. Using a mouse model that develops insulin(+) cell-containing hyperplastic ducts in response to the growth factor TGFalpha, we performed genetic lineage tracing experiments to determine which cells gave rise to both hyperplastic ductal cells and duct-associated insulin(+) cells. We found that hyperplastic ductal cells arose largely from acinar cells that changed their cell fate, or transdifferentiated, into ductal cells. However, insulin(+) cells adjacent to acinar-derived ductal cells arose from pre-existing insulin(+) cells, suggesting that islet endocrine cells can intercalate into hyperplastic ducts as they develop. We conclude that apparent pancreatic plasticity can result both from the ability of acinar cells to change fate and of endocrine cells to reorganize in association with duct structures.
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Affiliation(s)
- Stacy A. Blaine
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232-0443, USA
| | - Kevin C. Ray
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232-0443, USA
| | - Reginald Anunobi
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232-0443, USA
| | - Maureen A. Gannon
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232-0443, USA
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232-0443, USA
- Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, Nashville, TN 37232-0443, USA
| | - Mary K. Washington
- Department of Pathology, Vanderbilt University Medical Center, Nashville, TN 37232-0443, USA
| | - Anna L. Means
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232-0443, USA
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232-0443, USA
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Ray KC, Blaine SA, Washington MK, Braun AH, Singh AB, Harris RC, Harding PA, Coffey RJ, Means AL. Transmembrane and soluble isoforms of heparin-binding epidermal growth factor-like growth factor regulate distinct processes in the pancreas. Gastroenterology 2009; 137:1785-94. [PMID: 19689925 PMCID: PMC2767440 DOI: 10.1053/j.gastro.2009.07.067] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2008] [Revised: 06/26/2009] [Accepted: 07/31/2009] [Indexed: 12/02/2022]
Abstract
BACKGROUND & AIMS Heparin-binding epidermal growth factor-like growth factor (HB-EGF) is produced as a type-I, single-pass transmembrane protein that can be cleaved to release a diffusible peptide. HB-EGF, often overexpressed in damaged or diseased epithelium, is normally expressed in pancreatic islets, but its function is not understood. METHODS To understand the function of each isoform of HB-EGF, we made transgenes expressing either a constitutively transmembrane or a constitutively secreted protein. RESULTS The transmembrane isoform was not an inert precursor protein, but a functional molecule, downregulating the glucose-sensing apparatus of pancreatic islets. Conversely, the secreted form of HB-EGF improved islet function, but had severe fibrotic and neoplastic effects on surrounding tissues. Each isoform had a more severe phenotype than that of full-length HB-EGF, even though the full-length protein was efficiently cleaved, thus producing both isoforms, suggesting that a level of regulation was lost by separating the isoforms. CONCLUSIONS This work demonstrates that islet function depends on the ratio of cleaved to uncleaved HB-EGF and that the transmembrane intermediate, while deleterious to islet function, is necessary to restrict action of soluble HB-EGF away from surrounding tissue.
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Affiliation(s)
- Kevin C. Ray
- Dept. of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Stacy A. Blaine
- Dept. of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - M. Kay Washington
- Dept. of Pathology, Vanderbilt University Medical Center, Nashville, TN
| | - Ada H. Braun
- Dept. of Medicine, Vanderbilt University Medical Center, Nashville, TN, Dept. of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN
| | - Amar B. Singh
- Dept. of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Raymond C. Harris
- Dept. of Medicine, Vanderbilt University Medical Center, Nashville, TN, Dept. of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN
| | | | - Robert J. Coffey
- Dept. of Medicine, Vanderbilt University Medical Center, Nashville, TN, Dept. of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN
| | - Anna L. Means
- Dept. of Surgery, Vanderbilt University Medical Center, Nashville, TN, Dept. of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN,To whom correspondence should be addressed: Anna L. Means, PhD, Division of Surgical Oncology, Vanderbilt University Medical Center, 10445 MRB IV, 2213 Garland Ave., Nashville, TN 37232-0443, Phone: 615-343-0922, Fax: 615-343-1591,
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Abstract
The development of pancreatic fibrosis has been shown to be a major component in several diseases of the pancreas including pancreatic cancer, chronic pancreatitis, and type 2 diabetes mellitus, but its actual role in the progression of these disorders is still unknown. This fibrosis is characterized by stromal expansion and the excessive deposition of extracellular matrix (ECM) that replaces pancreatic tissue. This eventually leads to dysregulation of ECM turnover, production of cytokines, restriction of blood flow, and often exocrine and endocrine insufficiencies. Activated pancreatic stellate cells (PSCs) have been identified as key mediators in the progression of pancreatic fibrosis, serving as the predominant source of excess ECM proteins. Previously, we found that overexpression of the growth factor heparin-binding epidermal growth factor-like growth factor (HB-EGF) in pancreatic islets led to intraislet fibrosis. HB-EGF binds to and activates two receptors, epidermal growth factor receptor (EGFR) and ErbB4, as well as heparin moieties and CD9/DRAP27. To understand the mechanism underlying the induction of fibrogenesis by HB-EGF, we utilized a hypomorphic allele of Egfr, the Waved-2 allele, to demonstrate that EGFR signaling regulates fibrogenesis in vivo. Using an in vitro cell migration assay, we show that HB-EGF regulates both chemoattraction and stimulation of proliferation of PSCs via EGFR activation.
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Affiliation(s)
- Stacy A. Blaine
- Departments of Surgery, Medicine, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Kevin C. Ray
- Departments of Surgery, Medicine, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Kevin M. Branch
- Departments of Surgery, Medicine, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Pamela S. Robinson
- Departments of Surgery, Medicine, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Robert H. Whitehead
- Departments of Surgery, Medicine, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
| | - Anna L. Means
- Departments of Surgery, Medicine, and Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
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Means AL, Xu Y, Zhao A, Ray KC, Gu G. A CK19(CreERT) knockin mouse line allows for conditional DNA recombination in epithelial cells in multiple endodermal organs. Genesis 2008; 46:318-23. [PMID: 18543299 DOI: 10.1002/dvg.20397] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cre/LoxP-mediated DNA recombination allows for gene function and cell lineage analyses during embryonic development and tissue regeneration. Here, we describe the derivation of a K19(CreERT) mouse line in which the tamoxifen-activable CreER(T) was knocked into the endogenous cytokeratin 19 locus. In the absence of tamoxifen, leaky Cre activity could be detected only in less than 1% of stomach and intestinal epithelial cells, but not in pancreatic or hepatic epithelial tissues. Tamoxifen administration in postnatal animals induced widespread DNA recombination in epithelial cells of pancreatic ducts, hepatic ducts, stomach, and intestine in a dose-dependent manner. Significantly, we found that Cre activity could be induced in the putative gut stem/progenitor cells that sustained long-term gut epithelial expression of a Cre reporter. This mouse line should therefore provide a valuable reagent for manipulating gene activity and for cell lineage marking in multiorgans during normal tissue homeostasis and regeneration.
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Affiliation(s)
- Anna L Means
- Program in Developmental Biology and the Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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Means AL, Meszoely IM, Suzuki K, Miyamoto Y, Rustgi AK, Coffey RJ, Wright CVE, Stoffers DA, Leach SD. Pancreatic epithelial plasticity mediated by acinar cell transdifferentiation and generation of nestin-positive intermediates. Development 2005; 132:3767-76. [PMID: 16020518 DOI: 10.1242/dev.01925] [Citation(s) in RCA: 256] [Impact Index Per Article: 13.5] [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] [Indexed: 12/23/2022]
Abstract
Epithelial metaplasia occurs when one predominant cell type in a tissue is replaced by another, and is frequently associated with an increased risk of subsequent neoplasia. In both mouse and human pancreas, acinar-to-ductal metaplasia has been implicated in the generation of cancer precursors. We show that pancreatic epithelial explants undergo spontaneous acinar-to-ductal metaplasia in response to EGFR signaling, and that this change in epithelial character is associated with the appearance of nestin-positive transitional cells. Lineage tracing involving Cre/lox-mediated genetic cell labeling reveals that acinar-to-ductal metaplasia represents a true transdifferentiation event, mediated by initial dedifferentiation of mature exocrine cells to generate a population of nestin-positive precursors, similar to those observed during early pancreatic development. These results demonstrate that a latent precursor potential resides within mature exocrine cells, and that this potential is regulated by EGF receptor signaling. In addition, these observations provide a novel example of rigorously documented transdifferentiation within mature mammalian epithelium, and suggest that plasticity of mature cell types may play a role in the generation of neoplastic precursors.
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Affiliation(s)
- Anna L Means
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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Nomura S, Settle SH, Leys CM, Means AL, Peek RM, Leach SD, Wright CV, Coffey RJ, Goldenring JR. Evidence for repatterning of the gastric fundic epithelium associated with Ménétrier's disease and TGFalpha overexpression. Gastroenterology 2005; 128:1292-305. [PMID: 15887112 DOI: 10.1053/j.gastro.2005.03.019] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
BACKGROUND & AIMS Increase of intramucosal transforming growth factor alpha (TGFalpha) levels in the gastric fundus leads to oxyntic atrophy and massive foveolar hyperplasia in both metallothionein (MT)-TGFalpha mice and patients with Ménétrier's disease. We have evaluated the hypothesis that increased levels of TGFalpha in the fundus induces an antral pattern of cell differentiation in fundic glands by studying Pdx1, a transcription factor whose expression normally is confined to the gastric antrum. METHODS Induction of Pdx1 expression was evaluated in Pdx1(lacZ/+)/MT-TGFalpha bigenic mice treated with zinc. The distribution of Pdx1 in MT-TGFalpha mice and Ménétrier's disease patients was evaluated with anti-Pdx1 antibodies. Transcript levels were evaluated by quantitative polymerase chain reaction in mouse and human tissues and AGS cells. RESULTS In Pdx1(lacZ/+) mice, Pdx1 was expressed in antral mucosal cells including gastrin cells and TFF2-expressing deep glandular mucous cells. Zinc treatment for 2 to 8 weeks in Pdx1(lacZ/+)/MT-TGFalpha transgenic mice resulted in expression of Pdx1 throughout the fundus. No ectopic fundic Pdx1 expression was observed in either H. felis-infected or DMP777-treated mice. In MT-TGFalpha mice, 8 weeks of zinc treatment elicited nuclear Pdx1 staining throughout the fundic mucosa. TGFalpha treatment in AGS cells led to increases in Pdx1 and gastrin messenger RNA expression. Fundic sections from Ménétrier's disease patients showed nuclear Pdx1 staining throughout the fundic glands. Treatment of a Ménétrier's disease patient with an anti-epidermal growth factor receptor monoclonal antibody reduced fundic expression of both Pdx1 and gastrin. CONCLUSIONS Overexpression of TGFalpha in MT-TGFalpha mice and Ménétrier's disease patients elicits ectopic expression in the fundus of Pdx1, consistent with the phenotype of antralization.
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Affiliation(s)
- Sachiyo Nomura
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-2733, USA
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Means AL, Chytil A, Moses HL, Coffey RJ, Wright CVE, Taketo MM, Grady WM. Keratin 19 gene drives Cre recombinase expression throughout the early postimplantation mouse embryo. Genesis 2005; 42:23-7. [PMID: 15828001 DOI: 10.1002/gene.20119] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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] [Indexed: 12/28/2022]
Abstract
The development of Cre-lox technology has created new opportunities for studying the tissue-specific functions of genes in vivo during development and disease. We analyzed the spatial and temporal activity of Cre recombinase whose coding sequence was inserted into the endogenous locus for keratin 19. Rather than providing epithelial-specific recombination during organogenesis, this K19cre allele allows unexpected recombination in early embryonic development, resulting in recombination of a loxP-flanked allele throughout all tissues of the mouse, but with sparing of the extraembryonic endoderm, including the anterior visceral endoderm.
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Affiliation(s)
- Anna L Means
- Department of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee 37232-2733, USA.
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Means AL, Ray KC, Singh AB, Washington MK, Whitehead RH, Harris RC, Wright CVE, Coffey RJ, Leach SD. Overexpression of heparin-binding EGF-like growth factor in mouse pancreas results in fibrosis and epithelial metaplasia. Gastroenterology 2003; 124:1020-36. [PMID: 12671899 DOI: 10.1053/gast.2003.50150] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS Heparin-binding epidermal growth factor-like growth factor (HB-EGF) is expressed in both normal pancreatic islets and in pancreatic cancers, but its role in pancreatic physiology and disease is not known. This report examines the effects of HB-EGF overexpression in mouse pancreas. METHODS Transgenic mice were established using a tissue-specific promoter to express an HB-EGF complementary DNA in pancreatic beta cells, effectively elevating HB-EGF protein 3-fold over endogenous levels. RESULTS Mice overexpressing HB-EGF in pancreatic islets showed both endocrine and exocrine pancreatic defects. Initially, islets from transgenic mice failed to segregate alpha, beta, delta, and PP cells appropriately within islets, and had impaired separation from ducts and acini. Increased stroma was detected within transgenic islets, expanding with age to cause fibrosis of both endocrine and exocrine compartments. In addition to these structural abnormalities, subsets of transgenic mice developed profound hyperglycemia and/or proliferation of metaplastic ductal epithelium. Both conditions were associated with severe stromal expansion, suggesting a role for islet/stromal interaction in the onset of the pancreatic disease initiated by HB-EGF. Supporting this conclusion, primary mouse fibroblasts adhered to transgenic islets when the 2 tissues were cocultured in vitro, but did not interact with nontransgenic islets. CONCLUSIONS An elevation in HB-EGF protein in pancreatic islets led to altered interactions among islet cells and among islets, stromal tissues, and ductal epithelium. Many of the observed phenotypes appeared to involve altered cell adhesion. These data support a role for islet factors in the development of both endocrine and exocrine disease.
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Affiliation(s)
- Anna L Means
- Department of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA.
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Abstract
Exocrine pancreatic cell types comprise greater than 90% of parenchymal cell mass in the adult pancreas. However, the factors regulating differentiation of acinar and ductal epithelial cells remain incompletely characterized. Like pancreatic islet cells, acinar and ductal cells arise from pluripotent precursors within embryonic pancreatic epithelium. Recent studies have suggested that a common pool of pluripotent stem cells is responsible for generating both endocrine and exocrine cell types, and that specific signaling pathways regulate a critical balance between endocrine and exocrine lineage commitment.
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Affiliation(s)
- A L Means
- Departments of Surgery and Cell Biology, Vanderbilt University School of Medicine, Nashville, Tenn., USA
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Meszoely IM, Means AL, Scoggins CR, Leach SD. Developmental aspects of early pancreatic cancer. Cancer J 2001; 7:242-50. [PMID: 11561600] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The specific cell of origin responsible for generating pancreatic intraepithelial neoplasia and pancreatic ductal adenocarcinoma remains unknown. During development, epithelial stem cells within embryonic pancreatic epithelium give riseto mature acinar, ductal, and islet elements. Emerging evidence suggests that cells with precursor potential also exist within adult pancreas, resulting in significant developmental plasticity among both endocrine and exocrine cell types. In this review, the contribution of developmental plasticity in initiating pancreatic metaplasia and neoplasia is considered, and evidence supporting a role for epithelial stem cells in pancreatic cancer is discussed.
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Affiliation(s)
- I M Meszoely
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
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Scoggins CR, Meszoely IM, Wada M, Means AL, Yang L, Leach SD. p53-dependent acinar cell apoptosis triggers epithelial proliferation in duct-ligated murine pancreas. Am J Physiol Gastrointest Liver Physiol 2000; 279:G827-36. [PMID: 11005771 DOI: 10.1152/ajpgi.2000.279.4.g827] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The mechanisms linking acinar cell apoptosis and ductal epithelial proliferation remain unknown. To determine the relationship between these events, pancreatic duct ligation (PDL) was performed on p53(+/+) and p53(-/-) mice. In mice bearing a wild-type p53 allele, PDL resulted in upregulation of p53 protein in both acinar cells and proliferating duct-like epithelium. In contrast, upregulation of Bcl-2 occurred only in duct-like epithelium. Both p21(WAF1/CIP1) and Bax were also upregulated in duct-ligated lobes. After PDL in p53(+/+) mice, acinar cells underwent widespread apoptosis, while duct-like epithelium underwent proliferative expansion. In the absence of p53, upregulation of p53 target genes and acinar cell apoptosis did not occur. The absence of acinar cell apoptosis in p53(-/-) mice also eliminated the proliferative response to duct ligation. These data demonstrate that PDL-induced acinar cell apoptosis is a p53-dependent event and suggest a direct link between acinar cell apoptosis and proliferation of duct-like epithelium in duct-ligated pancreas.
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Affiliation(s)
- C R Scoggins
- Departments of Surgery and Cell Biology, The Vanderbilt-Ingram Cancer Center and Nashville Veterans Affairs Medical Center, Vanderbilt University, Nashville, Tennessee 37232-2736, USA
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Means AL, Thompson JR, Gudas LJ. Transcriptional regulation of the cellular retinoic acid binding protein I gene in F9 teratocarcinoma cells. Cell Growth Differ 2000; 11:71-82. [PMID: 10714763] [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] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Retinoic acid (RA) induces the differentiation of many murine teratocarcinoma cell lines such as F9 and P19. In F9 cells, the level of the cellular retinoic acid binding protein I (CRABP I) mRNA is greatly reduced after exposure of the cultured cells to exogenous RA. In P19 cells, the level of CRABP I mRNA is greatly increased after RA exposure. We have identified a 176-bp region in the murine CRABP I promoter, between -2.9 and -2.7 kb 5' of the start site of transcription, which acts as an enhancer in undifferentiated F9 stem cells and through which RA effects inhibition of CRABP I transcription. Within this region are two footprinted sites at -2763 and -2834. This 176-bp regulatory region does not function to enhance CRABP I transcription in P19 stem cells. Several DNA sequences within these two footprinted regions bind proteins from F9 nuclear extracts but not from P19 nuclear extracts (e.g., FP1B, FP1A, and FP2B), as assessed by gel shift assays. This 176-bp CRABP I genomic region has not been sequenced previously and functionally analyzed in cultured cells because it was not present in the murine CRABP I clones used for the promoter analyses reported earlier by another laboratory. The function of this enhancer may be to reduce the expression of the CRABP I gene in specific embryonic cell types in order to regulate the amount of RA to which the cells are exposed.
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Affiliation(s)
- A L Means
- Department of Pharmacology, Weill Medical College, Cornell University, New York, New York 10021, USA
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Abstract
The CRABP I gene is expressed in a spatiotemporal pattern in neural and mesenchymal tissues at the onset of organogenesis. The neural pattern of CRABP I expression includes specific rhombomeres of the hindbrain, neural crest cells and their derivatives the optic stalk, and the central area of the neural retina. We have created transgenic mouse lines with CRABP I 5' and transcribed regions fused to the lacZ structural gene that recapitulate much of this neural pattern of expression. Sequences 5' of the transcription initiation site between -7.8 and -3.2 kb confer beta-galactosidase expression to specific rhombomeres, migrating neural crest cells, trigeminal ganglion, the optic stalk, and the neural retina. We have also defined a region located between exon 1 and exon 8 that confers a portion of this expression pattern, including the mesencephalic projections of the trigeminal ganglion, the inner layer of the neural retina, and the peripheral layer of the posterior hindbrain. CRABP I expression in mesenchyme appears to require sequences in addition to or outside of those examined here.
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Affiliation(s)
- A L Means
- Department of Pharmacology, Cornell University Medical College, New York 10021, USA
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Means AL, Gudas LJ. FGF-2, BMP-2, and BMP-4 regulate retinoid binding proteins and receptors in 3T3 cells. Cell Growth Differ 1996; 7:989-996. [PMID: 8853894] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
An Important part of intercellular signalling is the ability of responding cells to regulate multiple signal transduction pathways. Just as retinoic acid exposure alters expression of many peptide growth factors and their receptors, we have found that peptide growth factors alter the expression of cellular retinoic acid binding proteins (CRABPs) and retinoic acid receptors (RARs). FGF-2 (basic fibroblast growth factor) treatment of BALB 3T3 fibroblasts increased the level of CRABP I RNA, whereas bone morphogenetic protein (BMP)-2 and BMP-4 reduced this level as well as the levels of CRABP II and RAR beta 1/beta 3 transcripts. Regulation of the CRABP I gene by FGF-2 occurred posttranscriptionally by increasing RNA stability. However, BMP-2 down-regulated CRABP I message without affecting message stability. Neither of these mechanisms was dominant, with intermediate levels of CRABP I RNA occurring in the presence of both FGF-2 and BMP-2 or BMP-4. These two different modes of regulation thus allow different levels of CRABP I RNA accumulation in the presence of different ratios of FGF-2 and BMP-2 or BMP-4.
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Affiliation(s)
- A L Means
- Department of Pharmacology, Cornell University Medical College, New York, New York 10021, USA
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Abstract
Several lines of experimentation suggest that endogenous retinoids, metabolites of vitamin A, play a role in the anterior/posterior development of the central body axis and the limbs of vertebrates. High levels of endogenous retinoids have been detected in proximity to these developing axes in a variety of vertebrate fetuses. Teratogenesis studies suggest that both retinoid excess and deficiency are capable of disrupting the development of these axes. Finally, retinoic acid receptors regulate many developmental control genes, including homeobox genes and growth factor genes.
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Affiliation(s)
- A L Means
- Department of Pharmacology, Cornell University Medical College, New York, NY 10021, USA
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Means AL, Slansky JE, McMahon SL, Knuth MW, Farnham PJ. The HIP1 binding site is required for growth regulation of the dihydrofolate reductase gene promoter. Mol Cell Biol 1992; 12:1054-63. [PMID: 1545788 PMCID: PMC369537 DOI: 10.1128/mcb.12.3.1054-1063.1992] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.3] [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] [Indexed: 12/27/2022] Open
Abstract
The transcription rate of the dihydrofolate reductase (DHFR) gene increases at the G1/S boundary of the proliferative cell cycle. Through analysis of transiently and stably transfected NIH 3T3 cells, we have now demonstrated that DHFR promoter sequences extending from -270 to +20 are sufficient to confer similar regulation on a reporter gene. Mutation of a protein binding site that spans sequences from -16 to +11 in the DHFR promoter resulted in loss of the transcriptional increase at the G1/S boundary. Purification of an activity from HeLa nuclear extract that binds to this region enriched for a 180-kDa polypeptide (HIP1). Using this HIP1 preparation, we have identified specific positions within the binding site that are critical for efficient protein-DNA interactions. An analysis of association and dissociation rates suggests that bound HIP1 protein can exchange rapidly with free protein. This rapid exchange may facilitate the burst of transcriptional activity from the DHFR promoter at the G1/S boundary.
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Affiliation(s)
- A L Means
- McArdle Laboratory for Cancer Research, University of Wisconsin, Madison 53706
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Abstract
The murine dihydrofolate reductase gene is regulated by a bidirectional promoter that lacks a TATA box. To identify the DNA sequences required for dihydrofolate reductase transcription, the activities of various templates were determined by in vitro transcription analysis. Our data indicate that sequences both upstream and downstream of the transcription initiation site modulate the activity of the dihydrofolate reductase promoter. We have focused on two regions downstream of the transcription initiation site that are important in determining the overall efficiency of the promoter. Region 1, which included exon 1 and part of intron 1, could stimulate transcription when placed in either orientation in the normal downstream position and when inserted upstream of the transcription start site. This region could also stimulate transcription in trans when the enhancer was physically separate from the promoter. Deletion of region 2, spanning 46 nucleotides of the 5' untranslated region, reduced transcriptional activity by fivefold. DNase I footprinting reactions identified protein-binding sites in both downstream stimulatory regions. Protein bound to two sites in region 1, both of which contain an inverted CCAAT box. The protein-binding site in the 5' untranslated region has extensive homology to binding sites in promoters that both lack (simian virus 40 late) and contain (adenovirus type 2 major late promoter and c-myc) TATA boxes.
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Affiliation(s)
- P J Farnham
- McArdle Laboratory for Cancer Research, University of Wisconsin, Madison 53706
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Abstract
We have identified a sequence element that specifies the position of transcription initiation for the dihydrofolate reductase gene. Unlike the functionally analogous TATA box that directs RNA polymerase II to initiate transcription 30 nucleotides downstream, the positioning element of the dihydrofolate reductase promoter is located directly at the site of transcription initiation. By using DNase I footprint analysis, we have shown that a protein binds to this initiator element. Transcription initiated at the dihydrofolate reductase initiator element when 28 nucleotides were inserted between it and all other upstream sequences, or when it was placed on either side of the DNA helix, suggesting that there is no strict spatial requirement between the initiator and an upstream element. Although neither a single Sp1-binding site nor a single initiator element was sufficient for transcriptional activity, the combination of one Sp1-binding site and the dihydrofolate reductase initiator element cloned into a plasmid vector resulted in transcription starting at the initiator element. We have also shown that the simian virus 40 late major initiation site has striking sequence homology to the dihydrofolate reductase initiation site and that the same, or a similar, protein binds to both sites. Examination of the sequences at other RNA polymerase II initiation sites suggests that we have identified an element that is important in the transcription of other housekeeping genes. We have thus named the protein that binds to the initiator element HIP1 (Housekeeping Initiator Protein 1).
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Affiliation(s)
- A L Means
- McArdle Laboratory for Cancer Research, University of Wisconsin, Madison 53706
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