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Kaffe E, Roulis M, Zhao J, Qu R, Sefik E, Mirza H, Zhou J, Zheng Y, Charkoftaki G, Vasiliou V, Vatner DF, Mehal WZ, Yuval Kluger, Flavell RA. Humanized mouse liver reveals endothelial control of essential hepatic metabolic functions. Cell 2023; 186:3793-3809.e26. [PMID: 37562401 PMCID: PMC10544749 DOI: 10.1016/j.cell.2023.07.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [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: 01/11/2023] [Revised: 04/24/2023] [Accepted: 07/12/2023] [Indexed: 08/12/2023]
Abstract
Hepatocytes, the major metabolic hub of the body, execute functions that are human-specific, altered in human disease, and currently thought to be regulated through endocrine and cell-autonomous mechanisms. Here, we show that key metabolic functions of human hepatocytes are controlled by non-parenchymal cells (NPCs) in their microenvironment. We developed mice bearing human hepatic tissue composed of human hepatocytes and NPCs, including human immune, endothelial, and stellate cells. Humanized livers reproduce human liver architecture, perform vital human-specific metabolic/homeostatic processes, and model human pathologies, including fibrosis and non-alcoholic fatty liver disease (NAFLD). Leveraging species mismatch and lipidomics, we demonstrate that human NPCs control metabolic functions of human hepatocytes in a paracrine manner. Mechanistically, we uncover a species-specific interaction whereby WNT2 secreted by sinusoidal endothelial cells controls cholesterol uptake and bile acid conjugation in hepatocytes through receptor FZD5. These results reveal the essential microenvironmental regulation of hepatic metabolism and its human-specific aspects.
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Affiliation(s)
- Eleanna Kaffe
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Manolis Roulis
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Jun Zhao
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA; Computational Biology and Bioinformatics Program, Yale University, New Haven, CT 06511, USA
| | - Rihao Qu
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA; Computational Biology and Bioinformatics Program, Yale University, New Haven, CT 06511, USA
| | - Esen Sefik
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Haris Mirza
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Jing Zhou
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Yunjiang Zheng
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Georgia Charkoftaki
- Department of Environmental Health Sciences, Yale School of Public Health, Yale University, New Haven, CT 06520, USA
| | - Vasilis Vasiliou
- Department of Environmental Health Sciences, Yale School of Public Health, Yale University, New Haven, CT 06520, USA
| | - Daniel F Vatner
- Department of Internal Medicine, Section of Endocrinology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Wajahat Z Mehal
- Department of Internal Medicine, Section of Digestive Diseases, Yale University, New Haven, CT 06520, USA; Veterans Affairs Medical Center, West Haven, CT 06516, USA
| | - Yuval Kluger
- Department of Pathology, Yale School of Medicine, New Haven, CT 06520, USA; Computational Biology and Bioinformatics Program, Yale University, New Haven, CT 06511, USA; Program of Applied Mathematics, Yale University, New Haven, CT 06511, USA
| | - Richard A Flavell
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA; Howard Hughes Medical Institute, Yale School of Medicine, New Haven, CT 06519, USA.
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2
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Ding C, Xu H, Yu Z, Roulis M, Qu R, Zhou J, Oh J, Crawford J, Gao Y, Jackson R, Sefik E, Li S, Wei Z, Skadow M, Yin Z, Ouyang X, Wang L, Zou Q, Su B, Hu W, Flavell RA, Li HB. RNA m 6A demethylase ALKBH5 regulates the development of γδ T cells. Proc Natl Acad Sci U S A 2022; 119:e2203318119. [PMID: 35939687 PMCID: PMC9388086 DOI: 10.1073/pnas.2203318119] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [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] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
γδ T cells are an abundant T cell population at the mucosa and are important in providing immune surveillance as well as maintaining tissue homeostasis. However, despite γδ T cells' origin in the thymus, detailed mechanisms regulating γδ T cell development remain poorly understood. N6-methyladenosine (m6A) represents one of the most common posttranscriptional modifications of messenger RNA (mRNA) in mammalian cells, but whether it plays a role in γδ T cell biology is still unclear. Here, we show that depletion of the m6A demethylase ALKBH5 in lymphocytes specifically induces an expansion of γδ T cells, which confers enhanced protection against gastrointestinal Salmonella typhimurium infection. Mechanistically, loss of ALKBH5 favors the development of γδ T cell precursors by increasing the abundance of m6A RNA modification in thymocytes, which further reduces the expression of several target genes including Notch signaling components Jagged1 and Notch2. As a result, impairment of Jagged1/Notch2 signaling contributes to enhanced proliferation and differentiation of γδ T cell precursors, leading to an expanded mature γδ T cell repertoire. Taken together, our results indicate a checkpoint role of ALKBH5 and m6A modification in the regulation of γδ T cell early development.
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Affiliation(s)
- Chenbo Ding
- aDepartment of Geriatrics, Center for Immune-Related Diseases, Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- bShanghai Jiao Tong University School of Medicine–Yale University Institute for Immune Metabolism, Shanghai 200025, China
| | - Hao Xu
- cDepartment of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Zhibin Yu
- aDepartment of Geriatrics, Center for Immune-Related Diseases, Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- bShanghai Jiao Tong University School of Medicine–Yale University Institute for Immune Metabolism, Shanghai 200025, China
| | - Manolis Roulis
- cDepartment of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Rihao Qu
- cDepartment of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
- dProgram of Computational Biology and Bioinformatics, Yale University, New Haven, CT 06520
- eDepartment of Pathology, Yale University School of Medicine, New Haven, CT 06510
| | - Jing Zhou
- aDepartment of Geriatrics, Center for Immune-Related Diseases, Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- bShanghai Jiao Tong University School of Medicine–Yale University Institute for Immune Metabolism, Shanghai 200025, China
| | - Joonseok Oh
- fDepartment of Chemistry, Yale University, New Haven, CT 06520
- gChemical Biology Institute, Yale University, West Haven, CT 06516
| | - Jason Crawford
- fDepartment of Chemistry, Yale University, New Haven, CT 06520
- gChemical Biology Institute, Yale University, West Haven, CT 06516
- hDepartment of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT 06520
| | - Yimeng Gao
- iSection of Hematology, Yale Cancer Center and Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520
- jYale Stem Cell Center, Yale University School of Medicine, New Haven, CT 06520
- kYale RNA Center, Yale University School of Medicine, New Haven, CT 06520
| | - Ruaidhrí Jackson
- cDepartment of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Esen Sefik
- cDepartment of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Simiao Li
- cDepartment of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Zheng Wei
- cDepartment of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Mathias Skadow
- cDepartment of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Zhinan Yin
- lZhuhai Precision Medical Center, Zhuhai People’s Hospital, Jinan University, Zhuhai 519000, Guangdong, China
- mBiomedical Translational Research Institute, Faculty of Medical Science, Jinan University, Guangzhou 510632, Guangdong, China
| | - Xinshou Ouyang
- nSection of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520
| | - Lei Wang
- aDepartment of Geriatrics, Center for Immune-Related Diseases, Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Qiang Zou
- aDepartment of Geriatrics, Center for Immune-Related Diseases, Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Bing Su
- aDepartment of Geriatrics, Center for Immune-Related Diseases, Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- bShanghai Jiao Tong University School of Medicine–Yale University Institute for Immune Metabolism, Shanghai 200025, China
| | - Weiguo Hu
- aDepartment of Geriatrics, Center for Immune-Related Diseases, Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- 2To whom correspondence may be addressed. , , or
| | - Richard A. Flavell
- cDepartment of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
- oHHMI, Yale University School of Medicine, New Haven, CT 06520
- 2To whom correspondence may be addressed. , , or
| | - Hua-Bing Li
- aDepartment of Geriatrics, Center for Immune-Related Diseases, Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- bShanghai Jiao Tong University School of Medicine–Yale University Institute for Immune Metabolism, Shanghai 200025, China
- 2To whom correspondence may be addressed. , , or
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Zhang T, Ding C, Chen H, Zhao J, Chen Z, Chen B, Mao K, Hao Y, Roulis M, Xu H, Kluger Y, Zou Q, Ye Y, Zhan M, Flavell RA, Li HB. m 6A mRNA modification maintains colonic epithelial cell homeostasis via NF-κB-mediated antiapoptotic pathway. Sci Adv 2022; 8:eabl5723. [PMID: 35333576 PMCID: PMC8956260 DOI: 10.1126/sciadv.abl5723] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 02/02/2022] [Indexed: 05/26/2023]
Abstract
Colonic mucosal barrier dysfunction is one of the major causes of inflammatory bowel disease (IBD). However, the mechanisms underlying mucosal barrier dysfunction are poorly understood. N6-methyladenosine (m6A) mRNA modification is an important modulator of epitranscriptional regulation of gene expression, participating in multiple physiological and pathological processes. However, the function of m6A modification in colonic epithelial cells and stem cells is unknown. Here, we show that m6A modification is essential for maintaining the homeostatic self-renewal in colonic stem cells. Specific deletion of the methyltransferase 14 (Mettl14) gene in mouse colon resulted in colonic stem cell apoptosis, causing mucosal barrier dysfunction and severe colitis. Mechanistically, we revealed that Mettl14 restricted colonic epithelial cell death by regulating the stability of Nfkbia mRNA and modulating the NF-κB pathway. Our results identified a previously unidentified role for m6A modification in colonic epithelial cells and stem cells, suggesting that m6A modification may be a potential therapeutic target for IBD.
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Affiliation(s)
- Ting Zhang
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Shanghai Jiao Tong University School of Medicine–Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Renji Hospital affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - Chenbo Ding
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Shanghai Jiao Tong University School of Medicine–Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Huifang Chen
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Shanghai Jiao Tong University School of Medicine–Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Jun Zhao
- Department of Pathology, Yale University School of Medicine, New Haven, CT 06520-8055, USA
| | - Zhejun Chen
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Baiwen Chen
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Kaiqiong Mao
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Shanghai Jiao Tong University School of Medicine–Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yajuan Hao
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Shanghai Jiao Tong University School of Medicine–Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Manolis Roulis
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520-8055, USA
| | - Hao Xu
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520-8055, USA
| | - Yuval Kluger
- Department of Pathology, Yale University School of Medicine, New Haven, CT 06520-8055, USA
| | - Qiang Zou
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Youqiong Ye
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Meixiao Zhan
- Zhuhai Interventional Medical Center, Zhuhai Precision Medical Center, Zhuhai People’s Hospital, Zhuhai Hospital of Jinan University, Zhuhai, Guangdong 519000, China
| | - Richard A. Flavell
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520-8055, USA
- Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06520-8055, USA
| | - Hua-Bing Li
- Shanghai Institute of Immunology, State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Shanghai Jiao Tong University School of Medicine–Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520-8055, USA
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4
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Linderman GC, Zhao J, Roulis M, Bielecki P, Flavell RA, Nadler B, Kluger Y. Zero-preserving imputation of single-cell RNA-seq data. Nat Commun 2022; 13:192. [PMID: 35017482 PMCID: PMC8752663 DOI: 10.1038/s41467-021-27729-z] [Citation(s) in RCA: 79] [Impact Index Per Article: 39.5] [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: 02/10/2020] [Accepted: 11/30/2021] [Indexed: 01/14/2023] Open
Abstract
A key challenge in analyzing single cell RNA-sequencing data is the large number of false zeros, where genes actually expressed in a given cell are incorrectly measured as unexpressed. We present a method based on low-rank matrix approximation which imputes these values while preserving biologically non-expressed genes (true biological zeros) at zero expression levels. We provide theoretical justification for this denoising approach and demonstrate its advantages relative to other methods on simulated and biological datasets.
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Affiliation(s)
- George C Linderman
- Program in Applied Mathematics, Yale University, New Haven, CT, 06511, USA
| | - Jun Zhao
- Interdepartmental Program of Computational Biology and Bioinformatics, Yale University, New Haven, CT, 06511, USA
| | - Manolis Roulis
- Department of Immunobiology, Yale University, New Haven, CT, 06511, USA
| | - Piotr Bielecki
- Department of Immunobiology, Yale University, New Haven, CT, 06511, USA.,Celsius Therapeutics, Cambridge, USA
| | - Richard A Flavell
- Department of Immunobiology, Yale University, New Haven, CT, 06511, USA.,Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT, USA
| | - Boaz Nadler
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel
| | - Yuval Kluger
- Program in Applied Mathematics, Yale University, New Haven, CT, 06511, USA. .,Interdepartmental Program of Computational Biology and Bioinformatics, Yale University, New Haven, CT, 06511, USA. .,Department of Pathology, Yale University, New Haven, CT, 06511, USA.
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5
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Wu N, Sun H, Zhao X, Zhang Y, Tan J, Qi Y, Wang Q, Ng M, Liu Z, He L, Niu X, Chen L, Liu Z, Li HB, Zeng YA, Roulis M, Liu D, Cheng J, Zhou B, Ng LG, Zou D, Ye Y, Flavell RA, Ginhoux F, Su B. MAP3K2-regulated intestinal stromal cells define a distinct stem cell niche. Nature 2021; 592:606-610. [PMID: 33658717 DOI: 10.1038/s41586-021-03283-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 01/25/2021] [Indexed: 01/07/2023]
Abstract
Intestinal stromal cells are known to modulate the propagation and differentiation of intestinal stem cells1,2. However, the precise cellular and molecular mechanisms by which this diverse stromal cell population maintains tissue homeostasis and repair are poorly understood. Here we describe a subset of intestinal stromal cells, named MAP3K2-regulated intestinal stromal cells (MRISCs), and show that they are the primary cellular source of the WNT agonist R-spondin 1 following intestinal injury in mice. MRISCs, which are epigenetically and transcriptomically distinct from subsets of intestinal stromal cells that have previously been reported3-6, are strategically localized at the bases of colon crypts, and function to maintain LGR5+ intestinal stem cells and protect against acute intestinal damage through enhanced R-spondin 1 production. Mechanistically, this MAP3K2 specific function is mediated by a previously unknown reactive oxygen species (ROS)-MAP3K2-ERK5-KLF2 axis to enhance production of R-spondin 1. Our results identify MRISCs as a key component of an intestinal stem cell niche that specifically depends on MAP3K2 to augment WNT signalling for the regeneration of damaged intestine.
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Affiliation(s)
- Ningbo Wu
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hongxiang Sun
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaoyun Zhao
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yao Zhang
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Gastroenterology, Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Jianmei Tan
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuanyuan Qi
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qun Wang
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Melissa Ng
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Zhaoyuan Liu
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lingjuan He
- The State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Xiaoyin Niu
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lei Chen
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Center for Microbiota & Immunological Diseases, Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhiduo Liu
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hua-Bing Li
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Jiao Tong University School of Medicine-Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yi Arial Zeng
- The State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Manolis Roulis
- Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT, USA
| | - Dou Liu
- Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT, USA
| | - Jinke Cheng
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bin Zhou
- The State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Lai Guan Ng
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Duowu Zou
- Department of Gastroenterology, Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Youqiong Ye
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Jiao Tong University School of Medicine-Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Richard A Flavell
- Shanghai Jiao Tong University School of Medicine-Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT, USA
| | - Florent Ginhoux
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.,Translational Immunology Institute, SingHealth/Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Bing Su
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China. .,The State Key Laboratory of Oncogenes and Related Genes, Shanghai Jiao Tong University School of Medicine, Shanghai, China. .,Center for Microbiota & Immunological Diseases, Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China. .,Shanghai Jiao Tong University School of Medicine-Yale Institute for Immune Metabolism, Shanghai Jiao Tong University School of Medicine, Shanghai, China. .,Key Laboratory of Molecular Radiation Oncology of Hunan Province, Xiangya Hospital, Central South University, Changsha, China.
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6
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Roulis M, Kaklamanos E, Kollias G, Flavell R. Abstract PR12: Paracrine orchestration of intestinal tumorigenesis at the mesenchymal-epithelial interface. Mol Cancer Res 2020. [DOI: 10.1158/1557-3125.hippo19-pr12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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
Intestinal tumor initiation is a probabilistic process that depends on the competition between mutant and normal epithelial stem cells in crypts. Intestinal stem cells are closely associated with a diverse but poorly characterized network of mesenchymal cell types. It remains unknown whether the physiologic mesenchymal microenvironment of mutant stem cells affects tumor initiation. Here we show that the mesenchymal niche controls tumor initiation in trans. By characterizing the heterogeneity of the intestinal mesenchyme by single cell RNA-seq, we identified a population of rare pericryptal Ptgs2-expressing fibroblasts (RPPFs) that constitutively process arachidonic acid into highly labile prostaglandin E2 (PGE2). Specific ablation of Ptgs2 in fibroblasts was sufficient to prevent tumor initiation in two different models of sporadic, autochthonous tumorigenesis. At the mechanistic level, by performing single-cell RNA-seq analyses of a mesenchymal niche organotypic model, we found that fibroblast-derived PGE2 reprograms intestinal stem cells into Tuft cell precursors. These are characterized by the activation of a strong tumor initiation program driven by the Hippo pathway effector Yap, a molecule indispensable for intestinal tumorigenesis. Organoid experiments established a novel molecular mechanism whereby PGE2 activates Yap dephosphorylation, nuclear translocation, and transcriptional activity by signaling specifically via receptor Ptger4. In vivo, epithelial-specific ablation of Ptger4 misdirected the regenerative reprogramming of stem cells, abrogated Yap target gene activation, and prevented sporadic tumor initiation in mutant mice, thereby demonstrating the robust paracrine control of tumor-initiating stem cells by PGE2/Ptger4. Patient-derived organoid analyses established that PGE2/ PTGER4 also regulate stem cell function in humans. Our study demonstrates for the first time that colorectal cancer initiation is orchestrated by the mesenchymal niche. Moreover, it reveals a mechanism whereby RPPFs exert paracrine control over tumor-initiating stem cells via the druggable PGE2/Ptger4/Yap signaling axis.
Citation Format: Manolis Roulis, Emilios Kaklamanos, George Kollias, Richard Flavell. Paracrine orchestration of intestinal tumorigenesis at the mesenchymal-epithelial interface [abstract]. In: Proceedings of the AACR Special Conference on the Hippo Pathway: Signaling, Cancer, and Beyond; 2019 May 8-11; San Diego, CA. Philadelphia (PA): AACR; Mol Cancer Res 2020;18(8_Suppl):Abstract nr PR12.
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7
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Jarret A, Jackson R, Duizer C, Healy ME, Zhao J, Rone JM, Bielecki P, Sefik E, Roulis M, Rice T, Sivanathan KN, Zhou T, Solis AG, Honcharova-Biletska H, Vélez K, Hartner S, Low JS, Qu R, de Zoete MR, Palm NW, Ring AM, Weber A, Moor AE, Kluger Y, Nowarski R, Flavell RA. Enteric Nervous System-Derived IL-18 Orchestrates Mucosal Barrier Immunity. Cell 2020; 180:813-814. [PMID: 32084342 DOI: 10.1016/j.cell.2020.02.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Jarret A, Jackson R, Duizer C, Healy ME, Zhao J, Rone JM, Bielecki P, Sefik E, Roulis M, Rice T, Sivanathan KN, Zhou T, Solis AG, Honcharova-Biletska H, Vélez K, Hartner S, Low JS, Qu R, de Zoete MR, Palm NW, Ring AM, Weber A, Moor AE, Kluger Y, Nowarski R, Flavell RA. Enteric Nervous System-Derived IL-18 Orchestrates Mucosal Barrier Immunity. Cell 2020; 180:50-63.e12. [PMID: 31923399 PMCID: PMC7339937 DOI: 10.1016/j.cell.2019.12.016] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [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] [Received: 02/15/2019] [Revised: 11/01/2019] [Accepted: 12/12/2019] [Indexed: 12/18/2022]
Abstract
Mucosal barrier immunity is essential for the maintenance of the commensal microflora and combating invasive bacterial infection. Although immune and epithelial cells are thought to be the canonical orchestrators of this complex equilibrium, here, we show that the enteric nervous system (ENS) plays an essential and non-redundant role in governing the antimicrobial protein (AMP) response. Using confocal microscopy and single-molecule fluorescence in situ mRNA hybridization (smFISH) studies, we observed that intestinal neurons produce the pleiotropic cytokine IL-18. Strikingly, deletion of IL-18 from the enteric neurons alone, but not immune or epithelial cells, rendered mice susceptible to invasive Salmonella typhimurium (S.t.) infection. Mechanistically, unbiased RNA sequencing and single-cell sequencing revealed that enteric neuronal IL-18 is specifically required for homeostatic goblet cell AMP production. Together, we show that neuron-derived IL-18 signaling controls tissue-wide intestinal immunity and has profound consequences on the mucosal barrier and invasive bacterial killing.
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Affiliation(s)
- Abigail Jarret
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Ruaidhrí Jackson
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Coco Duizer
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Marc E Healy
- Department of Pathology and Molecular Pathology, University Hospital Zurich, Zurich 8091, Switzerland; Institute of Molecular Cancer Research, University of Zurich, Zurich 8057, Switzerland
| | - Jun Zhao
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA; Program of Computational Biology and Bioinformatics, Yale University, New Haven, CT 06520, USA; Department of Pathology, Yale School of Medicine, New Haven, CT 06510, USA
| | - Joseph M Rone
- Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Piotr Bielecki
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Esen Sefik
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Manolis Roulis
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Tyler Rice
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Kisha N Sivanathan
- Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Ting Zhou
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Angel G Solis
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Hanna Honcharova-Biletska
- Department of Pathology and Molecular Pathology, University Hospital Zurich, Zurich 8091, Switzerland
| | - Karelia Vélez
- Institute of Molecular Cancer Research, University of Zurich, Zurich 8057, Switzerland
| | - Saskia Hartner
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA; University of Vienna, Universitätsring 1, Wien 1010, Austria
| | - Jun Siong Low
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Rihao Qu
- Program of Computational Biology and Bioinformatics, Yale University, New Haven, CT 06520, USA; Department of Pathology, Yale School of Medicine, New Haven, CT 06510, USA
| | - Marcel R de Zoete
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Noah W Palm
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Aaron M Ring
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Achim Weber
- Department of Pathology and Molecular Pathology, University Hospital Zurich, Zurich 8091, Switzerland; Institute of Molecular Cancer Research, University of Zurich, Zurich 8057, Switzerland
| | - Andreas E Moor
- Institute of Molecular Cancer Research, University of Zurich, Zurich 8057, Switzerland
| | - Yuval Kluger
- Program of Computational Biology and Bioinformatics, Yale University, New Haven, CT 06520, USA; Department of Pathology, Yale School of Medicine, New Haven, CT 06510, USA; Applied Mathematics Program, Yale University, New Haven, CT 06511, USA
| | - Roni Nowarski
- Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA.
| | - Richard A Flavell
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA; Howard Hughes Medical Institute, Yale University, New Haven, CT 06520, USA.
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9
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Roulis M, Flavell RA. Fibroblasts and myofibroblasts of the intestinal lamina propria in physiology and disease. Differentiation 2016; 92:116-131. [PMID: 27165847 DOI: 10.1016/j.diff.2016.05.002] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 04/19/2016] [Accepted: 05/03/2016] [Indexed: 01/14/2023]
Abstract
In this Review we summarize our current understanding of the biology of mesenchymal cells of the intestinal lamina propria focusing mainly on fibroblasts and myofibroblasts. The topics covered include 1) the embryonic origin of mesenchymal cells of the intestinal lamina propria and their heterogeneity in adults, 2) the role of the mesenchyme in intestinal development, 3) the physiological function of fibroblasts and myofibroblasts in adults as part of the intestinal stem cell niche and the mucosal immune system and 4) the involvement of fibroblasts and myofibroblasts in epithelial homeostasis upon injury and in the pathogenesis of diseases such as Inflammatory Bowel Diseases, fibrosis and cancer. We emphasize studies addressing the function of intestinal mesenchymal cells in vivo, and also discuss major open questions and current challenges in this field.
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Affiliation(s)
- Manolis Roulis
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Richard A Flavell
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA; Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06520, USA.
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10
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Roulis M, Bongers G, Armaka M, Salviano T, He Z, Singh A, Seidler U, Becker C, Demengeot J, Furtado GC, Lira SA, Kollias G. Host and microbiota interactions are critical for development of murine Crohn's-like ileitis. Mucosal Immunol 2016; 9:787-97. [PMID: 26487367 PMCID: PMC5027991 DOI: 10.1038/mi.2015.102] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [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: 03/27/2015] [Accepted: 08/31/2015] [Indexed: 02/04/2023]
Abstract
Deregulation of host-microbiota interactions in the gut is a pivotal characteristic of Crohn's disease. It remains unclear, however, whether commensals and/or the dysbiotic microbiota associated with pathology in humans are causally involved in Crohn's pathogenesis. Here, we show that Crohn's-like ileitis in Tnf(ΔARE/+) mice is microbiota-dependent. Germ-free Tnf(ΔARE/+) mice are disease-free and the microbiota and its innate recognition through Myd88 are indispensable for tumor necrosis factor (TNF) overexpression and disease initiation in this model. The epithelium of diseased mice shows no major defects in mucus barrier and paracellular permeability. However, Tnf(ΔARE/+) ileitis associates with the reduction of lysozyme-expressing Paneth cells, mediated by adaptive immune effectors. Furthermore, we show that established but not early ileitis in Tnf(ΔARE/+) mice involves defective expression of antimicrobials and dysbiosis, characterized by Firmicutes expansion, including epithelial-attaching segmented filamentous bacteria, and decreased abundance of Bacteroidetes. Microbiota modulation by antibiotic treatment at an early disease stage rescues ileitis. Our results suggest that the indigenous microbiota is sufficient to drive TNF overexpression and Crohn's ileitis in the genetically susceptible Tnf(ΔARE/+) hosts, whereas dysbiosis in this model results from disease-associated alterations including loss of lysozyme-expressing Paneth cells.
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Affiliation(s)
- M Roulis
- Institute of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Vari 16672, Greece
| | - G Bongers
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - M Armaka
- Institute of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Vari 16672, Greece
| | - T Salviano
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Z He
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - A Singh
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - U Seidler
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - C Becker
- Department of Medicine 1, Universitätsklinikum der Friedrich-Alexander-Universität, Erlangen, Germany
| | - J Demengeot
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - GC Furtado
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - SA Lira
- Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA,Address correspondence to: Sergio Lira, Immunology Institute, Icahn School of Medicine at Mount Sinai, 1425 Madison Ave, Box 1630, New York, NY 10029-6574. Phone: 1-212-659-9404; Fax: 1-212-849-2525; and George Kollias, Biomedical Sciences Research Center “Alexander Fleming”, 34, Al. Fleming Street, 16672 Vari, Greece. Phone: +302109656507; Fax: +302109656563; and Department of Physiology, Medical School, National & Kapodistrian University of Athens, 75 Micras Asias, Goudi-Athens, 115 27, Greece. Phone: +302107462507; Fax: +30210-7462571;
| | - G Kollias
- Institute of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Vari 16672, Greece,Second address: Department of Physiology, Medical School, National & Kapodistrian University of Athens, Athens 11527, Greece,Address correspondence to: Sergio Lira, Immunology Institute, Icahn School of Medicine at Mount Sinai, 1425 Madison Ave, Box 1630, New York, NY 10029-6574. Phone: 1-212-659-9404; Fax: 1-212-849-2525; and George Kollias, Biomedical Sciences Research Center “Alexander Fleming”, 34, Al. Fleming Street, 16672 Vari, Greece. Phone: +302109656507; Fax: +302109656563; and Department of Physiology, Medical School, National & Kapodistrian University of Athens, 75 Micras Asias, Goudi-Athens, 115 27, Greece. Phone: +302107462507; Fax: +30210-7462571;
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11
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Leppkes M, Roulis M, Neurath MF, Kollias G, Becker C. Pleiotropic functions of TNF-α in the regulation of the intestinal epithelial response to inflammation. Int Immunol 2014; 26:509-15. [PMID: 24821262 DOI: 10.1093/intimm/dxu051] [Citation(s) in RCA: 129] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
An important function of intestinal epithelial cells (IECs) is to maintain the integrity of the mucosal barrier. Inflammation challenges the integrity of the mucosal barrier and the intestinal epithelium needs to adapt to a multitude of signals in order to perform the complex process of maintenance and restitution of its barrier function. Dysfunctions in epithelial barrier integrity and restoration contribute to the pathogenesis of inflammatory bowel diseases (IBDs) such as Crohn's disease and ulcerative colitis. Mucosal healing has developed to a significant treatment goal in IBD. In this review, we would like to highlight physiologic and pathologic adaptations of the intestinal epithelium to inflammation, exemplified by its responses to TNF-α. A large body of literature exists that highlights the diverse effects of this cytokine on IECs. TNF-α modulates intestinal mucus secretion and constitution. TNF-α stimulation modulates paracellular flow via tight junctional control. TNF-α induces intracellular signaling cascades that determine significant cell fate decisions such as survival, cell death or proliferation. TNF-α impacts epithelial wound healing in ErbB- and Wnt-dependent pathways while also importantly guiding immune cell attraction and function. We selected important studies from recent years with a focus on functional in vivo data providing crucial insights into the complex process of intestinal homeostasis.
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Affiliation(s)
- Moritz Leppkes
- Medical Clinic 1, University Clinic, Friedrich Alexander University, Erlangen 91052, Germany
| | - Manolis Roulis
- Institute of Immunology, Biomedical Sciences Research Centre "Alexander Fleming," 34 Fleming Street, 16672 Vari, Greece
| | - Markus F Neurath
- Medical Clinic 1, University Clinic, Friedrich Alexander University, Erlangen 91052, Germany
| | - George Kollias
- Institute of Immunology, Biomedical Sciences Research Centre "Alexander Fleming," 34 Fleming Street, 16672 Vari, Greece
| | - Christoph Becker
- Medical Clinic 1, University Clinic, Friedrich Alexander University, Erlangen 91052, Germany
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12
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Koliaraki V, Roulis M, Kollias G. Tpl2 regulates intestinal myofibroblast HGF release to suppress colitis-associated tumorigenesis. J Clin Invest 2012; 122:4231-42. [PMID: 23064365 DOI: 10.1172/jci63917] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Accepted: 08/30/2012] [Indexed: 12/16/2022] Open
Abstract
The tumor microenvironment plays a significant role in colitis-associated cancer (CAC). Intestinal myofibroblasts (IMFs) are cells in the intestinal lamina propria secreting factors that are known to modulate carcinogenesis; however, the physiological role of IMFs and signaling pathways influencing CAC have remained unknown. Tumor progression locus 2 (Tpl2) is a MAPK that regulates inflammatory and oncogenic pathways. In this study we addressed the role of Tpl2 in CAC using complete and tissue-specific ablation of Tpl2 in mutant mice. Tpl2-deficient mice did not exhibit significant differences in inflammatory burdens following azoxymethane (AOM)/dextran sodium sulfate (DSS) administration compared with wild-type mice; however, the mutant mice developed significantly increased numbers and sizes of tumors, associated with enhanced epithelial proliferation and decreased apoptosis. Cell-specific ablation of Tpl2 in IMFs, but not in intestinal epithelial or myeloid cells, conferred a similar susceptibility to adenocarcinoma formation. Tpl2-deficient IMFs upregulated HGF production and became less sensitive to the negative regulation of HGF by TGF-β3. In vivo inhibition of HGF-mediated c-Met activation blocked early, enhanced colon dysplasia in Tpl2-deficient mice, indicating that Tpl2 normally suppresses the HGF/c-Met pathway. These findings establish a mesenchyme-specific role for Tpl2 in the regulation of HGF production and suppression of epithelial tumorigenesis.
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Affiliation(s)
- Vasiliki Koliaraki
- Institute of Immunology, Biomedical Sciences Research Centre Alexander Fleming, Vari, Attica, Greece
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13
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Apostolaki M, Manoloukos M, Roulis M, Wurbel MA, Müller W, Papadakis KA, Kontoyiannis DL, Malissen B, Kollias G. Role of beta7 integrin and the chemokine/chemokine receptor pair CCL25/CCR9 in modeled TNF-dependent Crohn's disease. Gastroenterology 2008; 134:2025-35. [PMID: 18439426 DOI: 10.1053/j.gastro.2008.02.085] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [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: 07/13/2007] [Revised: 02/04/2008] [Accepted: 02/28/2008] [Indexed: 12/02/2022]
Abstract
BACKGROUND & AIMS In the present work, we address the requirement for intestinal-specific homing molecules, the chemokine/chemokine receptor pair CCL25/CCR9 and beta7 integrin, in the pathogenesis of the CD8(+) T cell-dependent Tnf(DeltaARE) mouse model of Crohn's-like inflammatory bowel disease. METHODS We investigated by flow cytometry lymphocyte recruitment in the intestinal epithelium and lamina propria (LP); cytokine production by intraepithelial and LP lymphocytes; and peripheral expression of CCR9, alpha4beta7, and alphaEbeta7 integrin. The functional significance of CCL25/CCR9 and beta7 integrin in inflammatory lymphocyte recruitment and intestinal disease development was assessed in Tnf(DeltaARE) mice genetically lacking these molecules. RESULTS Intestinal inflammation in the Tnf(DeltaARE) mice is associated with early reduction of CD8alphaalpha-expressing intraepithelial lymphocytes, decreased T helper cell 1 and increased T helper cell 17 responses by LP CD4(+) lymphocytes, increased alphaEbeta7 integrin expression in peripheral activated/memory intestinal-homing CD8alphabeta lymphocytes, and predominance of tumor necrosis factor/interferon-gamma-producing CD8alphabeta lymphocytes in the epithelium. Although CCL25/CCR9 have been strongly implicated in T-lymphocyte recruitment to the small intestine, inflammatory pathology develops unperturbed in the genetic absence of CCL25/CCR9. Furthermore, CD8alphabeta lymphocyte recruitment in the intestinal epithelium and inflammatory infiltration in the LP are not impaired in CCR9- or CCL25-deficient Tnf(DeltaARE) mice. In contrast, genetic ablation of beta7 integrin results in complete amelioration of intestinal pathology. CONCLUSIONS Our findings demonstrate that development of intestinal inflammation in the Tnf(DeltaARE) mice is critically dependent on beta7 integrin-mediated T-lymphocyte recruitment, whereas the function of the CCL25/CCR9 axis appears dispensable in this model.
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Affiliation(s)
- Maria Apostolaki
- Institute of Immunology, Biomedical Sciences Research Center Alexander Fleming, Vari, Greece
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