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van Luyk ME, Krotenberg Garcia A, Lamprou M, Suijkerbuijk SJE. Cell competition in primary and metastatic colorectal cancer. Oncogenesis 2024; 13:28. [PMID: 39060237 PMCID: PMC11282291 DOI: 10.1038/s41389-024-00530-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 07/05/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024] Open
Abstract
Adult tissues set the scene for a continuous battle between cells, where a comparison of cellular fitness results in the elimination of weaker "loser" cells. This phenomenon, named cell competition, is beneficial for tissue integrity and homeostasis. In fact, cell competition plays a crucial role in tumor suppression, through elimination of early malignant cells, as part of Epithelial Defense Against Cancer. However, it is increasingly apparent that cell competition doubles as a tumor-promoting mechanism. The comparative nature of cell competition means that mutational background, proliferation rate and polarity all factor in to determine the outcome of these processes. In this review, we explore the intricate and context-dependent involvement of cell competition in homeostasis and regeneration, as well as during initiation and progression of primary and metastasized colorectal cancer. We provide a comprehensive overview of molecular and cellular mechanisms governing cell competition and its parallels with regeneration.
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Affiliation(s)
- Merel Elise van Luyk
- Division of Developmental Biology, Institute of Biodynamics and Biocomplexity, Department of Biology, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Ana Krotenberg Garcia
- Division of Developmental Biology, Institute of Biodynamics and Biocomplexity, Department of Biology, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Maria Lamprou
- Division of Developmental Biology, Institute of Biodynamics and Biocomplexity, Department of Biology, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Saskia Jacoba Elisabeth Suijkerbuijk
- Division of Developmental Biology, Institute of Biodynamics and Biocomplexity, Department of Biology, Faculty of Science, Utrecht University, Utrecht, The Netherlands.
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2
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Tanaka S, Orita H, Kataoka T, Miyazaki M, Saeki H, Wada R, Brock MV, Fukunaga T, Amano T, Shiroishi T. Gasdermin D represses inflammation-induced colon cancer development by regulating apoptosis. Carcinogenesis 2023; 44:341-349. [PMID: 36753047 DOI: 10.1093/carcin/bgad005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 12/07/2022] [Accepted: 02/06/2023] [Indexed: 02/09/2023] Open
Abstract
Chronic inflammation is widely recognized as a major risk factor for cancer formation, but the underlying mechanisms are poorly understood. Recently, it was shown that Gasdermin D (GSDMD) protein drives pyroptotic cell death in macrophages on cleavage by inflammatory caspases. Even though the Gsdmd gene is specifically expressed in the intestinal epithelium, the role of Gsdmd in the intestinal tissues remains poorly characterized. In this study, we examined the biological role of Gsdmd in colorectal cancer (CRC) development, employing an azoxymethane/dextran sulfate sodium carcinogenesis model. Results show that GSDMD deficiency enhances CRC development, probably due to decreased apoptosis caused by downregulation of interferon-gamma (IFNγ)-signal transducer and activator 1 (STAT1) signaling. Furthermore, we show that GSDMD protein is diminished in human colorectal cancer, indicating involvement of GSDMD in repression of CRC development in humans. Our findings provide a new insight into functions of Gsdmd/GSDMD in colonic inflammation and human CRC development.
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Affiliation(s)
- Shigekazu Tanaka
- Mammalian Genetics Laboratory, Genetic Strains Research Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Hajime Orita
- Shizuoka Medical Research Center for Disaster, Juntendo University, Shizuoka Hospital, 1129 Nagaoka, Izunokuni, Shizuoka 410-2295, Japan
- Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo Bunkyo Ward, Tokyo 113-8421, Japan
| | - Taro Kataoka
- Shizuoka Medical Research Center for Disaster, Juntendo University, Shizuoka Hospital, 1129 Nagaoka, Izunokuni, Shizuoka 410-2295, Japan
| | - Masahiro Miyazaki
- Shizuoka Medical Research Center for Disaster, Juntendo University, Shizuoka Hospital, 1129 Nagaoka, Izunokuni, Shizuoka 410-2295, Japan
| | - Harumi Saeki
- Department of Pathology, Juntendo University School of Medicine, 2-1-1 Hongo Bunkyo Ward, Tokyo 113-8421, Japan
| | - Ryo Wada
- Department of Pathology, Juntendo University Shizuoka Hospital, 1129 Nagaoka, Izunokuni, Shizuoka 410-2295, Japan
| | - Malcolm V Brock
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Tetsu Fukunaga
- Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo Bunkyo Ward, Tokyo 113-8421, Japan
| | - Takanori Amano
- Mammalian Genetics Laboratory, Genetic Strains Research Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- Next Generation Human Disease Model Team, RIKEN BioResource Research Center, Tsukuba 305-0074, Japan
| | - Toshihiko Shiroishi
- Mammalian Genetics Laboratory, Genetic Strains Research Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- RIKEN BioResource Research Center, Tsukuba 305-0074, Japan
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3
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Bala P, Rennhack JP, Aitymbayev D, Morris C, Moyer SM, Duronio GN, Doan P, Li Z, Liang X, Hornick JL, Yurgelun MB, Hahn WC, Sethi NS. Aberrant cell state plasticity mediated by developmental reprogramming precedes colorectal cancer initiation. SCIENCE ADVANCES 2023; 9:eadf0927. [PMID: 36989360 PMCID: PMC10058311 DOI: 10.1126/sciadv.adf0927] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 02/28/2023] [Indexed: 05/12/2023]
Abstract
Cell state plasticity is carefully regulated in adult epithelia to prevent cancer. The aberrant expansion of the normally restricted capability for cell state plasticity in neoplasia is poorly defined. Using genetically engineered and carcinogen-induced mouse models of intestinal neoplasia, we observed that impaired differentiation is a conserved event preceding cancer development. Single-cell RNA sequencing (scRNA-seq) of premalignant lesions from mouse models and a patient with hereditary polyposis revealed that cancer initiates by adopting an aberrant transcriptional state characterized by regenerative activity, marked by Ly6a (Sca-1), and reactivation of fetal intestinal genes, including Tacstd2 (Trop2). Genetic inactivation of Sox9 prevented adenoma formation, obstructed the emergence of regenerative and fetal programs, and restored multilineage differentiation by scRNA-seq. Expanded chromatin accessibility at regeneration and fetal genes upon Apc inactivation was reduced by concomitant Sox9 suppression. These studies indicate that aberrant cell state plasticity mediated by unabated regenerative activity and developmental reprogramming precedes cancer development.
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Affiliation(s)
- Pratyusha Bala
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA
| | - Jonathan P. Rennhack
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA
| | - Daulet Aitymbayev
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA
| | - Clare Morris
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Sydney M. Moyer
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA
| | - Gina N. Duronio
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Paul Doan
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Zhixin Li
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA
| | - Xiaoyan Liang
- Department of Gastroenterology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jason L. Hornick
- Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
| | - Matthew B. Yurgelun
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- Division of Gastrointestinal Oncology, Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - William C. Hahn
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA
| | - Nilay S. Sethi
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA
- Division of Gastrointestinal Oncology, Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
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4
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Lin CY, Yu HP, Chang YT, Lin ZC, Alalaiwe A, Hwang TL, Fang JY. Targeting anti-inflammatory immunonanocarriers to human and murine neutrophils via the Ly6 antigen for psoriasiform dermatitis alleviation. Biomater Sci 2023; 11:873-893. [PMID: 36515218 DOI: 10.1039/d2bm01521h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Psoriasis is a refractory and difficult-to-treat skin disorder. The neutrophil-targeting approach represents a promising option for psoriasis therapy. This study developed and examined NIMP-R14-conjugated immunonanoparticles for specific targeting to neutrophils associated with psoriasiform dermatitis. In the process, roflumilast (RFL), as a phosphodiesterase (PDE) 4 inhibitor, was encapsulated in the nanocarriers to assess the anti-inflammatory capability against primary neutrophil activation and murine psoriasiform lesion. The average size and surface charge of the immunonanocarriers were 305 ± 36 nm and -18 ± 6 mV, respectively. The monovalent antibody-conjugated nanoparticles offered precise uptake by both human and mouse neutrophils but failed to exhibit this effect in monocytes and lymphocytes. The intracellular RFL concentration of the immunonanocarriers was five-fold superior to that of the passive counterparts. The immunonanocarriers specifically recognized the neutrophils through the Ly6 antigen with no apparent cytotoxicity. The antibody-conjugated nanoparticles mitigated superoxide anion production and migration of the activated human neutrophils. The in vivo biodistribution in the psoriasiform mice, found using an in vivo imaging system (IVIS) and liquid chromatography (LC)-mass-mass analysis, showed that the antibody conjugation increased the nanoparticle residence in systemic circulation after intravenous administration. On the other hand, most of the nanoparticles were accumulated in the lesional skin after subcutaneous injection. The actively-targeted nanocarriers were better than the free RFL and unfunctionalized nanoparticles in suppressing psoriasiform inflammation. The immunonanocarriers reduced neutrophil recruitment and epidermal hyperplasia in the plaque. Intravenous and subcutaneous treatments with the immunonanocarriers significantly reduced the overexpressed cytokines and chemokines in the inflamed skin, demonstrating that the nanosystems could both systematically and locally alleviate inflammation. The results indicated that the NIMP-R14-conjugated RFL-loaded nanoparticles have potential as an anti-autoimmune disease delivery system for neutrophil targeting.
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Affiliation(s)
- Cheng-Yu Lin
- Graduate Institute of Biomedical Sciences, Chang Gung University, Kweishan, Taoyuan, Taiwan
| | - Huang-Ping Yu
- Department of Anesthesiology, Chang Gung Memorial Hospital, Kweishan, Taoyuan, Taiwan.,School of Medicine, College of Medicine, Chang Gung University, Kweishan, Taoyuan, Taiwan
| | - Yen-Tzu Chang
- Graduate Institute of Natural Products, Chang Gung University, Kweishan, Taoyuan, Taiwan.
| | - Zih-Chan Lin
- Chronic Diseases and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi, Chiayi, Taiwan
| | - Ahmed Alalaiwe
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia
| | - Tsong-Long Hwang
- Department of Anesthesiology, Chang Gung Memorial Hospital, Kweishan, Taoyuan, Taiwan.,Graduate Institute of Natural Products, Chang Gung University, Kweishan, Taoyuan, Taiwan. .,Research Center for Food and Cosmetic Safety, Research Center for Chinese Herbal Medicine, and Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology, Kweishan, Taoyuan, Taiwan.,Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
| | - Jia-You Fang
- Department of Anesthesiology, Chang Gung Memorial Hospital, Kweishan, Taoyuan, Taiwan.,Graduate Institute of Natural Products, Chang Gung University, Kweishan, Taoyuan, Taiwan. .,Research Center for Food and Cosmetic Safety, Research Center for Chinese Herbal Medicine, and Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology, Kweishan, Taoyuan, Taiwan
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5
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Identifying key regulators of the intestinal stem cell niche. Biochem Soc Trans 2021; 49:2163-2176. [PMID: 34665221 PMCID: PMC8589435 DOI: 10.1042/bst20210223] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/24/2021] [Accepted: 09/28/2021] [Indexed: 12/11/2022]
Abstract
The intestinal tract is lined by a single layer of epithelium that is one of the fastest regenerating tissues in the body and which therefore requires a very active and exquisitely controlled stem cell population. Rapid renewal of the epithelium is necessary to provide a continuous physical barrier from the intestinal luminal microenvironment that contains abundant microorganisms, whilst also ensuring an efficient surface for the absorption of dietary components. Specialised epithelial cell populations are important for the maintenance of intestinal homeostasis and are derived from adult intestinal stem cells (ISCs). Actively cycling ISCs divide by a neutral drift mechanism yielding either ISCs or transit-amplifying epithelial cells, the latter of which differentiate to become either absorptive lineages or to produce secretory factors that contribute further to intestinal barrier maintenance or signal to other cellular compartments. The mechanisms controlling ISC abundance, longevity and activity are regulated by several different cell populations and signalling pathways in the intestinal lamina propria which together form the ISC niche. However, the complexity of the ISC niche and communication mechanisms between its different components are only now starting to be unravelled with the assistance of intestinal organoid/enteroid/colonoid and single-cell imaging and sequencing technologies. This review explores the interaction between well-established and emerging ISC niche components, their impact on the intestinal epithelium in health and in the context of intestinal injury and highlights future directions and implications for this rapidly developing field.
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6
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Rae J, Hackney J, Huang K, Keir M, Herman A. Identification of an IL-22-Dependent Gene Signature as a Pharmacodynamic Biomarker. Int J Mol Sci 2021; 22:8205. [PMID: 34360971 PMCID: PMC8347589 DOI: 10.3390/ijms22158205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/24/2021] [Accepted: 07/26/2021] [Indexed: 11/16/2022] Open
Abstract
Interleukin-22 (IL-22) plays a role in epithelial barrier function and repair, and may provide benefits in conditions like inflammatory bowel disease. However, limited human data are available to assess the clinical effect of IL-22 administration. This study used a human intestinal cell line to identify an IL-22-dependent gene signature that could serve as a pharmacodynamic biomarker for IL-22 therapy. The response to IL-22Fc (UTTR1147A, an Fc-stabilized version of IL-22) was assessed in HT-29 cells by microarray, and the selected responsive genes were confirmed by qPCR. HT-29 cells demonstrated dose-dependent increases in STAT3 phosphorylation and multiple gene expression changes in response to UTTR1147A. Genes were selected that were upregulated by UTTR1147A, but to a lesser extent by IL-6, which also signals via STAT3. IL-1R1 was highly upregulated by UTTR1147A, and differential gene expression patterns were observed in response to IL-22Fc in the presence of IL-1β. An IL-22-dependent gene signature was identified that could serve as a pharmacodynamic biomarker in intestinal biopsies to support the clinical development of an IL-22 therapeutic. The differential gene expression pattern in the presence of IL-1β suggests that an inflammatory cytokine milieu in the disease setting could influence the clinical responses to IL-22.
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Affiliation(s)
- Julie Rae
- OMNI Biomarker Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA;
| | - Jason Hackney
- Bioinformatics, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA; (J.H.); (K.H.)
| | - Kevin Huang
- Bioinformatics, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA; (J.H.); (K.H.)
| | - Mary Keir
- OMNI Biomarker Discovery, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA;
| | - Ann Herman
- OMNI Biomarker Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA;
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7
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Maternal Neutrophil Depletion Fails to Avert Systemic Lipopolysaccharide-Induced Early Pregnancy Defects in Mice. Int J Mol Sci 2021; 22:ijms22157932. [PMID: 34360700 PMCID: PMC8347248 DOI: 10.3390/ijms22157932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/19/2021] [Accepted: 07/20/2021] [Indexed: 11/17/2022] Open
Abstract
Maternal infection-induced early pregnancy complications arise from perturbation of the immune environment at the uterine early blastocyst implantation site (EBIS), yet the underlying mechanisms remain unclear. Here, we demonstrated in a mouse model that the progression of normal pregnancy from days 4 to 6 induced steady migration of leukocytes away from the uterine decidual stromal zone (DSZ) that surrounds the implanted blastocyst. Uterine macrophages were found to be CD206+ M2-polarized. While monocytes were nearly absent in the DSZ, DSZ cells were found to express monocyte marker protein Ly6C. Systemic endotoxic lipopolysaccharide (LPS) exposure on day 5 of pregnancy led to: (1) rapid (at 2 h) induction of neutrophil chemoattractants that promoted huge neutrophil infiltrations at the EBISs by 24 h; (2) rapid (at 2 h) elevation of mRNA levels of MyD88, but not Trif, modulated cytokines at the EBISs; and (3) dose-dependent EBIS defects by day 7 of pregnancy. Yet, elimination of maternal neutrophils using anti-Ly6G antibody prior to LPS exposure failed to avert LPS-induced EBIS defects allowing us to suggest that activation of Tlr4-MyD88 dependent inflammatory pathway is involved in LPS-induced defects at EBISs. Thus, blocking the activation of the Tlr4-MyD88 signaling pathway may be an interesting approach to prevent infection-induced pathology at EBISs.
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8
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Krotenberg Garcia A, Fumagalli A, Le HQ, Jackstadt R, Lannagan TRM, Sansom OJ, van Rheenen J, Suijkerbuijk SJE. Active elimination of intestinal cells drives oncogenic growth in organoids. Cell Rep 2021; 36:109307. [PMID: 34233177 PMCID: PMC8278394 DOI: 10.1016/j.celrep.2021.109307] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 04/11/2021] [Accepted: 06/04/2021] [Indexed: 12/13/2022] Open
Abstract
Competitive cell interactions play a crucial role in quality control during development and homeostasis. Here, we show that cancer cells use such interactions to actively eliminate wild-type intestine cells in enteroid monolayers and organoids. This apoptosis-dependent process boosts proliferation of intestinal cancer cells. The remaining wild-type population activates markers of primitive epithelia and transits to a fetal-like state. Prevention of this cell-state transition avoids elimination of wild-type cells and, importantly, limits the proliferation of cancer cells. Jun N-terminal kinase (JNK) signaling is activated in competing cells and is required for cell-state change and elimination of wild-type cells. Thus, cell competition drives growth of cancer cells by active out-competition of wild-type cells through forced cell death and cell-state change in a JNK-dependent manner.
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Affiliation(s)
- Ana Krotenberg Garcia
- Department of Molecular Pathology, Oncode Institute, Netherlands Cancer Institute, Amsterdam 1066 CX, the Netherlands
| | - Arianna Fumagalli
- Department of Molecular Pathology, Oncode Institute, Netherlands Cancer Institute, Amsterdam 1066 CX, the Netherlands
| | - Huy Quang Le
- Department of Immunology and Respiratory, Boehringer-Ingelheim Pharma GmbH & Co. KG, 88400 Biberach, Germany
| | - Rene Jackstadt
- Cancer Research UK Beatson Institute, Glasgow G61 1BD, UK
| | | | - Owen James Sansom
- Cancer Research UK Beatson Institute, Glasgow G61 1BD, UK; Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Glasgow G61 1QH, UK
| | - Jacco van Rheenen
- Department of Molecular Pathology, Oncode Institute, Netherlands Cancer Institute, Amsterdam 1066 CX, the Netherlands
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9
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Zhang L, Sultana N, Yan J, Yang F, Chen F, Chepurko E, Yang FC, Du Q, Zangi L, Xu M, Bu L, Cai CL. Cardiac Sca-1 + Cells Are Not Intrinsic Stem Cells for Myocardial Development, Renewal, and Repair. Circulation 2019; 138:2919-2930. [PMID: 30566018 DOI: 10.1161/circulationaha.118.035200] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND For more than a decade, Sca-1+ cells within the mouse heart have been widely recognized as a stem cell population with multipotency that can give rise to cardiomyocytes, endothelial cells, and smooth muscle cells in vitro and after cardiac grafting. However, the developmental origin and authentic nature of these cells remain elusive. METHODS Here, we used a series of high-fidelity genetic mouse models to characterize the identity and regenerative potential of cardiac resident Sca-1+ cells. RESULTS With these novel genetic tools, we found that Sca-1 does not label cardiac precursor cells during early embryonic heart formation. Postnatal cardiac resident Sca-1+ cells are in fact a pure endothelial cell population. They retain endothelial properties and exhibit minimal cardiomyogenic potential during development, normal aging and upon ischemic injury. CONCLUSIONS Our study provides definitive insights into the nature of cardiac resident Sca-1+ cells. The observations challenge the current dogma that cardiac resident Sca-1+ cells are intrinsic stem cells for myocardial development, renewal, and repair, and suggest that the mechanisms of transplanted Sca-1+ cells in heart repair need to be reassessed.
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Affiliation(s)
- Lu Zhang
- Riley Heart Research Center and Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (L. Zhang, F.Y., C.-L.C.).,Department of Developmental and Regenerative Biology and The Black Family Stem Cell Institute (L. Zhang, N.S., F.Y., C.-L.C.), Icahn School of Medicine at Mount Sinai, New York
| | - Nishat Sultana
- Department of Developmental and Regenerative Biology and The Black Family Stem Cell Institute (L. Zhang, N.S., F.Y., C.-L.C.), Icahn School of Medicine at Mount Sinai, New York.,Department of Medicine and Cardiovascular Research Center (N.S., E.C., L. Zangi), Icahn School of Medicine at Mount Sinai, New York
| | - Jianyun Yan
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, and Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Guangzhou, China (J.Y.)
| | - Fan Yang
- Riley Heart Research Center and Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (L. Zhang, F.Y., C.-L.C.).,Department of Developmental and Regenerative Biology and The Black Family Stem Cell Institute (L. Zhang, N.S., F.Y., C.-L.C.), Icahn School of Medicine at Mount Sinai, New York
| | - Fuxue Chen
- College of Life Sciences, Shanghai University, China (F.C.)
| | - Elena Chepurko
- Department of Medicine and Cardiovascular Research Center (N.S., E.C., L. Zangi), Icahn School of Medicine at Mount Sinai, New York
| | - Feng-Chun Yang
- Department of Biochemistry and Molecular Biology, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, FL (F.-C.Y., Q.D., M.X.)
| | - Qinghua Du
- Department of Biochemistry and Molecular Biology, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, FL (F.-C.Y., Q.D., M.X.)
| | - Lior Zangi
- Department of Medicine and Cardiovascular Research Center (N.S., E.C., L. Zangi), Icahn School of Medicine at Mount Sinai, New York
| | - Mingjiang Xu
- Department of Biochemistry and Molecular Biology, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, FL (F.-C.Y., Q.D., M.X.)
| | - Lei Bu
- Leon H. Charney Division of Cardiology, New York University School of Medicine, New York, NY (L.B.)
| | - Chen-Leng Cai
- Riley Heart Research Center and Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (L. Zhang, F.Y., C.-L.C.).,Department of Developmental and Regenerative Biology and The Black Family Stem Cell Institute (L. Zhang, N.S., F.Y., C.-L.C.), Icahn School of Medicine at Mount Sinai, New York
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10
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Morey P, Meyer TF. The Sweeping Role of Cholesterol Depletion in the Persistence of Helicobacter pylori Infections. Curr Top Microbiol Immunol 2019; 421:209-227. [PMID: 31123891 DOI: 10.1007/978-3-030-15138-6_9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The ability of Helicobacter pylori to persist lifelong in the human gastric mucosa is a striking phenomenon. It is even more surprising since infection is typically associated with a vivid inflammatory response. Recent studies revealed the mechanism by which this pathogen inhibits the epithelial responses to IFN-γ and other central inflammatory cytokines in order to abolish an effective antimicrobial defense. The mechanism is based on the modification and depletion of cholesterol by the pathogen's cholesterol-α-glucosyltransferase. It abrogates the assembly of numerous cytokine receptors due to the reduction of lipid rafts. Particularly, the receptors for IFN-γ, IL-22, and IL-6 then fail to assemble properly and to activate JAK/STAT signaling. Consequently, cholesterol depletion prevents the release of antimicrobial peptides, including the highly effective β-defensin-3. Intriguingly, the inhibition is spatially restricted to heavily infected cells, while the surrounding epithelium continues to respond normally to cytokine stimulation, thus providing a platform of the intense inflammation typically observed in H. pylori infections. It appears that pathogen and host establish a homeostatic balance between tightly colonized and rather inflamed sites. This homeostasis is influenced by the levels of available cholesterol, which potentially exacerbate H. pylori-induced inflammation. The observed blockage of epithelial effector mechanisms by H. pylori constitutes a convincing explanation for the previous failures of T-cell-based vaccination against H. pylori, since infected epithelial cells remain inert upon stimulation by effector cytokines. Moreover, the mechanism provides a rationale for the carcinogenic action of this pathogen in that persistent infection and chronic inflammation represent a pro-carcinogenic environment. Thus, cholesterol-α-glucosyltransferase has been revealed as a central pathogenesis determinant of H. pylori.
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Affiliation(s)
- Pau Morey
- Instituto Universitario de Investigación en Ciencias de la Salud (IUNICS), Universidad de las Islas Baleares, Palma de Mallorca, Spain.
| | - Thomas F Meyer
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany.
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11
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Nusse YM, Savage AK, Marangoni P, Rosendahl-Huber AKM, Landman TA, de Sauvage FJ, Locksley RM, Klein OD. Parasitic helminths induce fetal-like reversion in the intestinal stem cell niche. Nature 2018. [PMID: 29950724 DOI: 10.1038/s41586‐018‐0257‐1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Epithelial surfaces form critical barriers to the outside world and are continuously renewed by adult stem cells1. Whereas dynamics of epithelial stem cells during homeostasis are increasingly well understood, how stem cells are redirected from a tissue-maintenance program to initiate repair after injury remains unclear. Here we examined infection by Heligmosomoides polygyrus, a co-evolved pathosymbiont of mice, to assess the epithelial response to disruption of the mucosal barrier. H. polygyrus disrupts tissue integrity by penetrating the duodenal mucosa, where it develops while surrounded by a multicellular granulomatous infiltrate2. Crypts overlying larvae-associated granulomas did not express intestinal stem cell markers, including Lgr53, in spite of continued epithelial proliferation. Granuloma-associated Lgr5- crypt epithelium activated an interferon-gamma (IFN-γ)-dependent transcriptional program, highlighted by Sca-1 expression, and IFN-γ-producing immune cells were found in granulomas. A similar epithelial response accompanied systemic activation of immune cells, intestinal irradiation, or ablation of Lgr5+ intestinal stem cells. When cultured in vitro, granuloma-associated crypt cells formed spheroids similar to those formed by fetal epithelium, and a sub-population of H. polygyrus-induced cells activated a fetal-like transcriptional program, demonstrating that adult intestinal tissues can repurpose aspects of fetal development. Therefore, re-initiation of the developmental program represents a fundamental mechanism by which the intestinal crypt can remodel itself to sustain function after injury.
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Affiliation(s)
- Ysbrand M Nusse
- Biomedical Sciences Graduate Program, University of California, San Francisco, CA, USA.,Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, CA, USA
| | - Adam K Savage
- Howard Hughes Medical Institute and Departments of Medicine and Microbiology & Immunology, University of California, San Francisco, CA, USA
| | - Pauline Marangoni
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, CA, USA
| | - Axel K M Rosendahl-Huber
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, CA, USA
| | - Tyler A Landman
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, CA, USA
| | | | - Richard M Locksley
- Howard Hughes Medical Institute and Departments of Medicine and Microbiology & Immunology, University of California, San Francisco, CA, USA.
| | - Ophir D Klein
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, CA, USA. .,Department of Pediatrics and Institute for Human Genetics, University of California, San Francisco, CA, USA.
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12
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Parasitic helminths induce fetal-like reversion in the intestinal stem cell niche. Nature 2018; 559:109-113. [PMID: 29950724 PMCID: PMC6042247 DOI: 10.1038/s41586-018-0257-1] [Citation(s) in RCA: 187] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 05/09/2018] [Indexed: 12/18/2022]
Abstract
Epithelial surfaces form critical barriers to the outside world and are continuously renewed by adult stem cells1. Whereas epithelial stem cell dynamics during homeostasis are increasingly well understood, how stem cells are redirected from a tissue-maintenance program to initiate repair after injury remains unclear. Here, we examined infection by Heligmosomoides polygyrus (Hp), a co-evolved pathosymbiont of mice, to assess the epithelial response to disruption of the mucosal barrier. Hp disrupts tissue integrity by penetrating the duodenal mucosa, where it develops while surrounded by a multicellular granulomatous infiltrate2. Unexpectedly, intestinal stem cell (ISC) markers, including Lgr53, were lost in crypts overlying larvae-associated granulomas, despite continued epithelial proliferation. Granuloma-associated Lgr5− crypt epithelia activated an interferon-gamma (IFNγ)-dependent transcriptional program, highlighted by Sca-1 expression, and IFNγ-producing immune cells were found in granulomas. A similar epithelial response accompanied systemic activation of immune cells, intestinal irradiation, or ablation of Lgr5+ ISCs. Granuloma-associated crypt cells generated fetal-like spheroids in culture, and a sub-population of Hp-induced cells activated a fetal-like transcriptional program, demonstrating that adult intestinal tissues can repurpose aspects of fetal development. Thus, re-initiation of the developmental program represents a fundamental mechanism by which the intestinal crypt can remodel to sustain function after injury.
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13
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Yui S, Azzolin L, Maimets M, Pedersen MT, Fordham RP, Hansen SL, Larsen HL, Guiu J, Alves MRP, Rundsten CF, Johansen JV, Li Y, Madsen CD, Nakamura T, Watanabe M, Nielsen OH, Schweiger PJ, Piccolo S, Jensen KB. YAP/TAZ-Dependent Reprogramming of Colonic Epithelium Links ECM Remodeling to Tissue Regeneration. Cell Stem Cell 2017; 22:35-49.e7. [PMID: 29249464 PMCID: PMC5766831 DOI: 10.1016/j.stem.2017.11.001] [Citation(s) in RCA: 400] [Impact Index Per Article: 57.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 09/25/2017] [Accepted: 10/31/2017] [Indexed: 12/23/2022]
Abstract
Tissue regeneration requires dynamic cellular adaptation to the wound environment. It is currently unclear how this is orchestrated at the cellular level and how cell fate is affected by severe tissue damage. Here we dissect cell fate transitions during colonic regeneration in a mouse dextran sulfate sodium (DSS) colitis model, and we demonstrate that the epithelium is transiently reprogrammed into a primitive state. This is characterized by de novo expression of fetal markers as well as suppression of markers for adult stem and differentiated cells. The fate change is orchestrated by remodeling the extracellular matrix (ECM), increased FAK/Src signaling, and ultimately YAP/TAZ activation. In a defined cell culture system recapitulating the extracellular matrix remodeling observed in vivo, we show that a collagen 3D matrix supplemented with Wnt ligands is sufficient to sustain endogenous YAP/TAZ and induce conversion of cell fate. This provides a simple model for tissue regeneration, implicating cellular reprogramming as an essential element. The repairing epithelium can be isolated based on Sca1 expression Markers upregulated during tissue repair are expressed in the fetal intestine Mechano-transduction via FAK, Src, and YAP/TAZ facilitate efficient tissue repair YAP/TAZ activation is required and sufficient to induce cellular reprogramming
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Affiliation(s)
- Shiro Yui
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Luca Azzolin
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy
| | - Martti Maimets
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Marianne Terndrup Pedersen
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Robert P Fordham
- Wellcome - MRC Cambridge Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Stine L Hansen
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Hjalte L Larsen
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Jordi Guiu
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Mariana R P Alves
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Carsten F Rundsten
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Jens V Johansen
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Yuan Li
- Department of Gastroenterology, Medical Section, Herlev Hospital, University of Copenhagen, 2730 Herlev, Denmark
| | - Chris D Madsen
- Department of Laboratory Medicine, Division of Translational Cancer Research, Lund University, 223 81 Lund, Sweden
| | - Tetsuya Nakamura
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo 113-8519, Japan
| | - Mamoru Watanabe
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo 113-8519, Japan
| | - Ole H Nielsen
- Department of Gastroenterology, Medical Section, Herlev Hospital, University of Copenhagen, 2730 Herlev, Denmark
| | - Pawel J Schweiger
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark
| | - Stefano Piccolo
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy.
| | - Kim B Jensen
- BRIC - Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen N, Denmark; Novo Nordisk Foundation Center for Stem Cell Research, Faculty of Health Sciences, University of Copenhagen, 2200 Copenhagen N, Denmark.
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14
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Organization, evolution and functions of the human and mouse Ly6/uPAR family genes. Hum Genomics 2016; 10:10. [PMID: 27098205 PMCID: PMC4839075 DOI: 10.1186/s40246-016-0074-2] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 04/14/2016] [Indexed: 01/08/2023] Open
Abstract
Members of the lymphocyte antigen-6 (Ly6)/urokinase-type plasminogen activator receptor (uPAR) superfamily of proteins are cysteine-rich proteins characterized by a distinct disulfide bridge pattern that creates the three-finger Ly6/uPAR (LU) domain. Although the Ly6/uPAR family proteins share a common structure, their expression patterns and functions vary. To date, 35 human and 61 mouse Ly6/uPAR family members have been identified. Based on their subcellular localization, these proteins are further classified as GPI-anchored on the cell membrane, or secreted. The genes encoding Ly6/uPAR family proteins are conserved across different species and are clustered in syntenic regions on human chromosomes 8, 19, 6 and 11, and mouse Chromosomes 15, 7, 17, and 9, respectively. Here, we review the human and mouse Ly6/uPAR family gene and protein structure and genomic organization, expression, functions, and evolution, and introduce new names for novel family members.
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15
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Wang X, Yang Y, Huycke MM. Commensal bacteria drive endogenous transformation and tumour stem cell marker expression through a bystander effect. Gut 2015; 64:459-68. [PMID: 24906974 PMCID: PMC4345889 DOI: 10.1136/gutjnl-2014-307213] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
OBJECTIVE Commensal bacteria and innate immunity play a major role in the development of colorectal cancer (CRC). We propose that selected commensals polarise colon macrophages to produce endogenous mutagens that initiate chromosomal instability (CIN), lead to expression of progenitor and tumour stem cell markers, and drive CRC through a bystander effect. DESIGN Primary murine colon epithelial cells were repetitively exposed to Enterococcus faecalis-infected macrophages, or purified trans-4-hydroxy-2-nonenal (4-HNE)-an endogenous mutagen and spindle poison produced by macrophages. CIN, gene expression, growth as allografts in immunodeficient mice were examined for clones and expression of markers confirmed using interleukin (IL) 10 knockout mice colonised by E. faecalis. RESULTS Primary colon epithelial cells exposed to polarised macrophages or 4-hydroxy-2-nonenal developed CIN and were transformed after 10 weekly treatments. In immunodeficient mice, 8 of 25 transformed clones grew as poorly differentiated carcinomas with 3 tumours invading skin and/or muscle. All tumours stained for cytokeratins confirming their epithelial cell origin. Gene expression profiling of clones showed alterations in 3 to 7 cancer driver genes per clone. Clones also strongly expressed stem/progenitor cell markers Ly6A and Ly6E. Although not differentially expressed in clones, murine allografts positively stained for the tumour stem cell marker doublecortin-like kinase 1. Doublecortin-like kinase 1 and Ly6A/E were expressed by epithelial cells in colon biopsies for areas of inflamed and dysplastic tissue from E. faecalis-colonised IL-10 knockout mice. CONCLUSIONS These results validate a novel mechanism for CRC that involves endogenous CIN and cellular transformation arising through a microbiome-driven bystander effect.
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Affiliation(s)
- Xingmin Wang
- The Muchmore Laboratories for Infectious Diseases Research, Department of Veterans Affairs Medical Center, Oklahoma City, Oklahoma, USA,Department of Radiation Oncology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Yonghong Yang
- The Muchmore Laboratories for Infectious Diseases Research, Department of Veterans Affairs Medical Center, Oklahoma City, Oklahoma, USA,Department of Radiation Oncology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Mark M Huycke
- The Muchmore Laboratories for Infectious Diseases Research, Department of Veterans Affairs Medical Center, Oklahoma City, Oklahoma, USA,Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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16
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Li Y, Esain V, Teng L, Xu J, Kwan W, Frost IM, Yzaguirre AD, Cai X, Cortes M, Maijenburg MW, Tober J, Dzierzak E, Orkin SH, Tan K, North TE, Speck NA. Inflammatory signaling regulates embryonic hematopoietic stem and progenitor cell production. Genes Dev 2014; 28:2597-612. [PMID: 25395663 PMCID: PMC4248291 DOI: 10.1101/gad.253302.114] [Citation(s) in RCA: 176] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Here, Li et al. show that inflammatory signaling regulates embryonic hematopoietic stem and progenitor cell (HSPC) formation. HSCs from aorta/gonad/mesonephros (AGM) regions of midgestation mouse embryos expressed a robust innate immune/inflammatory signature. Mouse embryos lacking interferon γ (IFN-γ )or IFN-α signaling and zebrafish lacking IFN-γ and IFN-ϕ activity had fewer AGM HSPCs. IRF2-occupied genes identified in human fetal liver CD34+ HSPCs were actively transcribed in human and mouse HSPCs. Identifying signaling pathways that regulate hematopoietic stem and progenitor cell (HSPC) formation in the embryo will guide efforts to produce and expand HSPCs ex vivo. Here we show that sterile tonic inflammatory signaling regulates embryonic HSPC formation. Expression profiling of progenitors with lymphoid potential and hematopoietic stem cells (HSCs) from aorta/gonad/mesonephros (AGM) regions of midgestation mouse embryos revealed a robust innate immune/inflammatory signature. Mouse embryos lacking interferon γ (IFN-γ) or IFN-α signaling and zebrafish morphants lacking IFN-γ and IFN-ϕ activity had significantly fewer AGM HSPCs. Conversely, knockdown of IFN regulatory factor 2 (IRF2), a negative regulator of IFN signaling, increased expression of IFN target genes and HSPC production in zebrafish. Chromatin immunoprecipitation (ChIP) combined with sequencing (ChIP-seq) and expression analyses demonstrated that IRF2-occupied genes identified in human fetal liver CD34+ HSPCs are actively transcribed in human and mouse HSPCs. Furthermore, we demonstrate that the primitive myeloid population contributes to the local inflammatory response to impact the scale of HSPC production in the AGM region. Thus, sterile inflammatory signaling is an evolutionarily conserved pathway regulating the production of HSPCs during embryonic development.
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Affiliation(s)
- Yan Li
- Abramson Family Cancer Research Institute, Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19014, USA
| | - Virginie Esain
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Li Teng
- Department of Internal Medicine, University of Iowa, Iowa City, Iowa 52242, USA
| | - Jian Xu
- Howard Hughes Medical Institute, Division of Hematology/Oncology, Boston Children's Hospital, Boston, Massachusetts 02115, USA
| | - Wanda Kwan
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Isaura M Frost
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Amanda D Yzaguirre
- Abramson Family Cancer Research Institute, Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19014, USA
| | - Xiongwei Cai
- Abramson Family Cancer Research Institute, Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19014, USA
| | - Mauricio Cortes
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Marijke W Maijenburg
- Abramson Family Cancer Research Institute, Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19014, USA
| | - Joanna Tober
- Abramson Family Cancer Research Institute, Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19014, USA
| | - Elaine Dzierzak
- The University of Edinburgh, Edinburgh EH8 9YL, United Kingdom
| | - Stuart H Orkin
- Howard Hughes Medical Institute, Division of Hematology/Oncology, Boston Children's Hospital, Boston, Massachusetts 02115, USA; Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA
| | - Kai Tan
- Department of Internal Medicine, University of Iowa, Iowa City, Iowa 52242, USA; Department of Bioengineering, University of Iowa, Iowa City, Iowa 52242, USA
| | - Trista E North
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115, USA;
| | - Nancy A Speck
- Abramson Family Cancer Research Institute, Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19014, USA
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17
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Milk oligosaccharide sialyl(α2,3)lactose activates intestinal CD11c+ cells through TLR4. Proc Natl Acad Sci U S A 2013; 110:17444-9. [PMID: 24101501 DOI: 10.1073/pnas.1306322110] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Breast milk oligosaccharides shape the intestinal environment by affecting mucosal immunity and bacterial colonization. To clarify the role of milk oligosaccharide sialyl(α2,3)lactose (3SL) in intestinal physiology and disease, we investigated colitis development in Il10(-/-) mice exposed to normal or 3SL-deficient milk during lactation. Onset and progression of intestinal inflammation were delayed in Il10(-/-) mice deficient for the α2,3 sialyltransferase 4 (ST3GAL4) responsible for 3SL biosynthesis. The proinflammatory role of 3SL was confirmed by showing that oral supplementation of newborn Il10(-/-);St3gal4(-/-) mice with 3SL increased colitis severity. Conversely, fostering of newborn Il10(-/-) mice to lactating St3gal4(-/-) mothers reduced colitis severity. 3SL directly stimulated mesenteric lymph node CD11c(+) dendritic cells and induced production of cytokines required for expansion of TH1 and TH17 T cells. The stimulatory effect of 3SL was attenuated in Tlr4-deficient CD11c(+) cells, demonstrating that 3SL induces inflammation through Toll-like receptor 4 (TLR4) signaling. Thus, 3SL directly modulates mucosal immunity, which increases susceptibility to colitis.
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18
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Russ AE, Peters JS, McNabb WC, Barnett MPG, Anderson RC, Park Z, Zhu S, Maclean P, Young W, Reynolds GW, Roy NC. Gene expression changes in the colon epithelium are similar to those of intact colon during late inflammation in interleukin-10 gene deficient mice. PLoS One 2013; 8:e63251. [PMID: 23700416 PMCID: PMC3659096 DOI: 10.1371/journal.pone.0063251] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 04/01/2013] [Indexed: 01/08/2023] Open
Abstract
In addition to their role in absorption and secretion, epithelial cells play an important role in the protection of the colon mucosa from the resident microbiota and are important for the maintenance of homeostasis. Microarray analysis of intact colon samples is widely used to gain an overview of the cellular pathways and processes that are active in the colon during inflammation. Laser microdissection of colon epithelial cells allows a more targeted analysis of molecular pathways in the mucosa, preceding and during inflammation, with potentially increased sensitivity to changes in specific cell populations. The aim of this study was to investigate the molecular changes that occur in early and late inflammation stages in colon epithelium of a mouse model of inflammatory bowel diseases. Microarray analysis of intact colon samples and microdissected colon epithelial cell samples from interleukin-10 gene deficient and control mice at 6 and 12 weeks of age was undertaken. Results of gene set enrichment analysis showed that more immune-related pathways were identified between interleukin-10 gene deficient and control mice at 6 weeks of age in epithelial cells than intact colon. This suggests that targeting epithelial cells could increase sensitivity for detecting immune changes that occur early in the inflammatory process. However, in the later stages of inflammation, microarray analyses of intact colon and epithelium both provide a similar overview of gene expression changes in the colon mucosa at the pathway level.
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Affiliation(s)
- Anna E. Russ
- Food Nutrition & Health Team, Food & Bio-based Products Group, AgResearch Grasslands, Palmerston North, New Zealand
- Institute of Food Nutrition and Human Health, Massey University, Palmerston North, New Zealand
| | - Jason S. Peters
- Food Nutrition & Health Team, Food & Bio-based Products Group, AgResearch Grasslands, Palmerston North, New Zealand
| | - Warren C. McNabb
- Riddet Institute, Massey University, Palmerston North, New Zealand
- AgResearch Grasslands, Palmerston North, New Zealand
| | - Matthew P. G. Barnett
- Food Nutrition & Health Team, Food & Bio-based Products Group, AgResearch Grasslands, Palmerston North, New Zealand
| | - Rachel C. Anderson
- Food Nutrition & Health Team, Food & Bio-based Products Group, AgResearch Grasslands, Palmerston North, New Zealand
| | - Zaneta Park
- Bioinformatics & Statistics, AgResearch, Hamilton, New Zealand
| | - Shuotun Zhu
- Discipline of Nutrition, Faculty of Medicine and Health Sciences, The University of Auckland, Auckland, New Zealand
- Auckland Cancer Society Research Centre, The University of Auckland, Auckland, New Zealand
| | - Paul Maclean
- Bioinformatics & Statistics, AgResearch, Hamilton, New Zealand
| | - Wayne Young
- Food Nutrition & Health Team, Food & Bio-based Products Group, AgResearch Grasslands, Palmerston North, New Zealand
| | - Gordon W. Reynolds
- Institute of Food Nutrition and Human Health, Massey University, Palmerston North, New Zealand
| | - Nicole C. Roy
- Food Nutrition & Health Team, Food & Bio-based Products Group, AgResearch Grasslands, Palmerston North, New Zealand
- Riddet Institute, Massey University, Palmerston North, New Zealand
- * E-mail:
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19
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Lee PY, Wang JX, Parisini E, Dascher CC, Nigrovic PA. Ly6 family proteins in neutrophil biology. J Leukoc Biol 2013; 94:585-94. [PMID: 23543767 DOI: 10.1189/jlb.0113014] [Citation(s) in RCA: 205] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The murine Ly6 complex was identified 35 years ago using antisera to lymphocytes. With advances in mAb development, molecular cloning, and genome sequencing, >20 structurally related genes have been identified within this complex on chromosome 15. All members of the Ly6 family and their human homologues share the highly conserved LU domain and most also possess a GPI anchor. Interestingly, many Ly6 proteins are expressed in a lineage-specific fashion, and their expression often correlates with stages of differentiation. As a result, Ly6 proteins are frequently used as surface markers for leukocyte subset identification and targets for antibody-mediated depletion. Murine neutrophils display prominent surface expression of several Ly6 proteins, including Ly6B, Ly6C, and Ly6G. Although the physiology of most Ly6 proteins is not well understood, a role in neutrophil functions, such as migration, is recognized increasingly. In this review, we will provide an overview of the Ly6 complex and discuss, in detail, the specific Ly6 proteins implicated in neutrophil biology.
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Affiliation(s)
- Pui Y Lee
- 1.Immunology, and Allergy, Brigham and Women's Hospital, One Jimmy Fund Way, Smith 516c, Boston, MA 02115, USA.
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20
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Contribution of a single host genetic locus to mouse adenovirus type 1 infection and encephalitis. mBio 2012; 3:mBio.00131-12. [PMID: 22647790 PMCID: PMC3372963 DOI: 10.1128/mbio.00131-12] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Susceptibility to mouse adenovirus type 1 (MAV-1) is mouse strain dependent; susceptible mice die from hemorrhagic encephalomyelitis. The MAV-1 susceptibility quantitative trait locus Msq1 accounts for ~40% of the phenotypic (brain viral load) variance that occurs between resistant BALB/c and susceptible SJL mice after MAV-1 infection. Using an interval-specific congenic mouse strain (C.SJL-Msq1SJL), in which the SJL-derived allele Msq1SJL is present in a BALB/c background, we demonstrate that Msq1SJL controls the development of high brain viral titers in response to MAV-1 infection, yet does not account for the total extent of brain pathology or mortality in SJL mice. C.SJL-Msq1SJL mice had disruption of the blood-brain barrier and increased brain water content after MAV-1 infection, but these effects occurred later and were not as severe, respectively, as those noted in infected SJL mice. As expected, BALB/c mice showed minimal pathology in these assays. Infection of SJL- and C.SJL-Msq1SJL-derived primary mouse brain endothelial cells resulted in loss of barrier properties, whereas BALB/c-derived cells retained their barrier properties despite being equally capable of supporting MAV-1 infection. Finally, we provide evidence that organ pathology and inflammatory cell recruitment to the brain following MAV-1 infection were both influenced by Msq1. These results validate Msq1 as an important host factor in MAV-1 infection and refine the major role of the locus in development of MAV-1 encephalitis. They further suggest that additional host factors or gene interactions are involved in the mechanism of pathogenesis in MAV-1-infected SJL mice. A successful viral infection requires both host and viral factors; identification of host components involved in viral replication and pathogenesis is important for development of therapeutic interventions. A genetic locus (Msq1) controlling mouse adenovirus type 1 (MAV-1) brain infection was previously identified. Genes in Msq1 belong to the same family of genes associated with susceptibility to other encephalitic viruses, HIV-1 and West Nile virus. We constructed an interval-specific congenic mouse strain to examine the contribution of Msq1 to MAV-1 susceptibility and brain morbidity. We compared infected resistant, susceptible, and congenic mice regarding known MAV-1 disease manifestations in the brain (survival, viral loads, blood-brain barrier disruption, edema, mouse brain endothelial cell barrier properties, pathology, and inflammatory cell recruitment) to determine the extent to which Msq1 influences MAV-1 infection outcome. Our results showed that Msq1 is a critical host genetic factor that controls many aspects of MAV-1 infection.
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21
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Structural modification of the gastrointestinal epithelium during immune-dependent granulomatosis. Bull Exp Biol Med 2012; 150:490-4. [PMID: 22268051 DOI: 10.1007/s10517-011-1176-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We present results of pathomorphological study of the mucosa epithelium in various parts of the gastrointestinal tract in Crohn's disease. Particular attention was paid to structural transformation of epithelial cells. Barrier dysfunction of the gastrointestinal mucosa was shown to be one of the major pathogenetic factors for Crohn's disease.
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22
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Fuhrer A, Sprenger N, Kurakevich E, Borsig L, Chassard C, Hennet T. Milk sialyllactose influences colitis in mice through selective intestinal bacterial colonization. J Exp Med 2010; 207:2843-54. [PMID: 21098096 PMCID: PMC3005226 DOI: 10.1084/jem.20101098] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Accepted: 10/28/2010] [Indexed: 01/17/2023] Open
Abstract
Milk oligosaccharides contribute to the development of the intestinal environment by acting as decoy receptors for pathogens and as prebiotics, which promote the colonization of commensal bacteria. Here, using α2,3- and α2,6-sialyltransferase-deficient mice, we investigated the role of the sialylated milk oligosaccharides sialyl(α2,3)lactose and sialyl(α2,6)lactose on mucosal immunity. The exposure of newborn mice to milk containing or deficient in sialyllactose had no impact on the development of mucosal leukocyte populations. However, when challenged by dextran sulfate sodium (DSS) in drinking water, adult mice that had been fostered on sialyl(α2,3)lactose-deficient milk were more resistant to colitis compared with mice fostered on normal milk or sialyl(α2,6)lactose-deficient milk. Analysis of intestinal microbiota showed different colonization patterns depending on the presence or absence of sialyl(α2,3)lactose in the milk. Germ-free mice reconstituted with intestinal microbiota isolated from mice fed on sialyl(α2,3)lactose-deficient milk were more resistant to DSS-induced colitis than germ-free mice reconstituted with standard intestinal microbiota. Thus, exposure to sialyllactose during infancy affects bacterial colonization of the intestine, which influences the susceptibility to DSS-induced colitis in adult mice.
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Affiliation(s)
- Andrea Fuhrer
- Institute of Physiology and Center for Integrative Human Physiology, University of Zurich, 8057 Zurich, Switzerland
| | - Norbert Sprenger
- Nestlé Research Center, Vers-chez-les-Blanc, 1026 Lausanne, Switzerland
| | - Ekaterina Kurakevich
- Institute of Physiology and Center for Integrative Human Physiology, University of Zurich, 8057 Zurich, Switzerland
| | - Lubor Borsig
- Institute of Physiology and Center for Integrative Human Physiology, University of Zurich, 8057 Zurich, Switzerland
| | - Christophe Chassard
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, 8092 Zurich, Switzerland
| | - Thierry Hennet
- Institute of Physiology and Center for Integrative Human Physiology, University of Zurich, 8057 Zurich, Switzerland
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23
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Fang K, Bruce M, Pattillo CB, Zhang S, Stone R, Clifford J, Kevil CG. Temporal genomewide expression profiling of DSS colitis reveals novel inflammatory and angiogenesis genes similar to ulcerative colitis. Physiol Genomics 2010; 43:43-56. [PMID: 20923862 DOI: 10.1152/physiolgenomics.00138.2010] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Dextran sodium sulfate (DSS)-induced colitis is widely used to study pathological mechanisms and potential treatments of inflammatory bowel disease. Because temporal changes in genome expression profiles remain unknown in this model, we performed whole genome expression profile analysis during the development of DSS colitis in comparison with ulcerative colitis (UC) specimens to identify novel and common responses during disease. Colon tissue from DSS-treated mice was collected at days 0, 2, 4, and 6. Half of each specimen was used for histopathological analysis and half for Affymetrix whole genome expression profiling and qRT-PCR validation. Genesifter and Ingenuity software analysis was used to identify differentially expressed genes and perform interactive network analysis. Identified DSS-associated genes in mice were also compared with UC patient data. We identified 1,609 genes that were significantly altered during DSS colitis; the majority were functionally related to inflammation, angiogenesis, metabolism, biological adhesion, cellular growth and proliferation, and cell-to-cell signaling responses. Five hundred and one genes were progressively upregulated, while one hundred seventy-three genes were progressively downregulated. Changes in gene expression were validated in a subset of 33 genes by qRT-PCR, with r(2) = 0.925. Ingenuity gene interaction network analysis revealed novel relationships among antigen presentation, cell morphology, and other biological functions in the DSS mouse. Finally, DSS colitis gene array data were compared with UC patient array data: 152 genes were similarly upregulated, and 22 genes were downregulated. Temporal genomewide expression profile analysis of DSS-induced colitis revealed novel associations with various immune responses and tissue remodeling events such as angiogenesis similar to those in UC patients. This study provides a comprehensive view of DSS colitis changes in colon gene expression and identifies common molecules with clinical specimens that are interesting targets for further investigation.
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Affiliation(s)
- Kai Fang
- Department of Pathology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana 71103, USA
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24
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Spindler KR, Welton AR, Lim ES, Duvvuru S, Althaus IW, Imperiale JE, Daoud AI, Chesler EJ. The major locus for mouse adenovirus susceptibility maps to genes of the hematopoietic cell surface-expressed LY6 family. THE JOURNAL OF IMMUNOLOGY 2010; 184:3055-62. [PMID: 20164425 DOI: 10.4049/jimmunol.0903363] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Susceptibility to mouse adenovirus type 1 is associated with the major quantitative trait locus Msq1. Msq1 was originally mapped to a 13-Mb region of mouse chromosome (Chr) 15 in crosses between SJL/J and BALB/cJ inbred mice. We have now narrowed Msq1 to a 0.75-Mb interval from 74.68 to 75.43 Mb, defined by two anonymous markers, rs8259436 and D15Spn14, using data from 1396 backcross mice. The critical interval includes 14 Ly6 or Ly6-related genes, including Ly6a (encoding Sca-1/TAP), Ly6e (Sca-2/Tsa1), Ly6g (Gr-1), and gpihbp1 (GPI-anchored high-density lipoprotein-binding protein 1), as well as the gene encoding an aldosterone synthase (Cyp11b2). The Ly6 family members are attractive candidates for virus susceptibility genes because their products are GPI-anchored membrane proteins expressed on lymphoid and myeloid cells, with proposed functions in cell adhesion and cell signaling. To determine interstrain variation in susceptibility and produce additional resources for cloning Msq1, we assayed the susceptibility phenotype of four previously untested inbred mouse strains. Susceptibility of strain 129S6/SvEvTac was subsequently localized to the Ly6 complex region, using polymorphic genetic markers on Chr 15 in a population of 271 (129S6/SvEvTac x BALB/cJ)F(1) x BALB/cJ backcross mice. We identified a major 129S6/SvEvTac susceptibility allele, Msq1(129S6), on Chr 15 in the same region as Msq1(SJL). The results indicate that a major host factor in mouse adenovirus type 1 susceptibility is likely to be a member of the Ly6 gene family.
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Affiliation(s)
- Katherine R Spindler
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA.
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25
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Protection against intestinal amebiasis by a recombinant vaccine is transferable by T cells and mediated by gamma interferon. Infect Immun 2009; 77:3909-18. [PMID: 19564375 DOI: 10.1128/iai.00487-09] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
We have previously shown that vaccination with purified Entamoeba histolytica Gal/GalNAc lectin or recombinant subunits can protect mice from intestinal amebiasis upon intracecal challenge. In this study, we demonstrated with adoptive-transfer experiments that this lectin vaccine protection is mediated by T cells but not serum. The cell-mediated immune (CMI) response was characterized by significant gamma interferon (IFN-gamma), interleukin 12 (IL-12), IL-2, IL-10, and IL-17 production. To move toward a human vaccine, we switched to a recombinant protein and tested a range of adjuvants and routes appropriate for humans. We found that subcutaneous delivery of LecA with IDRI's adjuvant system EM014 elicited a potent Th1-type CMI profile and provided significant protection, as measured by culture negativity (79% efficacy); intranasal immunization with cholera toxin provided 56% efficacy; and alum induced a Th2-type response that protected 62 to 68% of mice. Several antibody and CMI cytokine responses were examined for correlates of protection, and prechallenge IFN-gamma(+) or IFN-gamma-, IL-2-, and tumor necrosis factor alpha-triple-positive CD4 cells in blood were statistically associated with protection. To test the role of IFN-gamma in LecA-mediated protection, we neutralized IFN-gamma in LecA-immunized mice and found that it abrogated the protection conferred by vaccination. These data demonstrate that CMI is sufficient for vaccine protection from intestinal amebiasis and reveal an important role for IFN-gamma, even in the setting of alum.
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26
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Whitmire JK, Eam B, Whitton JL. Mice deficient in stem cell antigen-1 (Sca1, Ly-6A/E) develop normal primary and memory CD4+ and CD8+ T-cell responses to virus infection. Eur J Immunol 2009; 39:1494-504. [PMID: 19384870 PMCID: PMC2757104 DOI: 10.1002/eji.200838959] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Stem cell antigen-1 (Sca1, Ly-6A/E) is a well-established marker of murine hematopoietic stem cells, and also is expressed on memory T cells. It has been suggested that the functional maintenance of T-cell memory requires the expression of Sca1 on a specialized population of memory T cells termed "memory stem cells". Here, we evaluate the requirement for Sca1 in the primary T-cell response to virus infection, and in the establishment and maintenance of T-cell memory. We find that Sca1 expression increases on almost all CD4(+) and CD8(+) T cells during virus infection, and remains high on virus-specific memory cells. However, Sca1-deficient (Sca1KO) mice generate normal primary T-cell responses to infection; the kinetics, the immunodominance hierarchy, and the absolute numbers of CD4(+) and CD8(+) T cells are essentially indistinguishable from those observed in WT mice. Furthermore, by several criteria, primary and memory T cells in Sca1-deficient mice are phenotypically and functionally normal. These data indicate that Sca1, although perhaps a useful marker of virus-specific memory T cells, is not required for the regulation of T-cell quantity or quality, or for the development of a competent pool of memory cells.
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Affiliation(s)
- Jason K. Whitmire
- Department of Immunology and Microbial Science, SP30-2110, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037, USA, Tel: 858-784-7147, FAX: 858-784-7380,
| | - Boreth Eam
- Department of Immunology and Microbial Science, SP30-2110, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037, USA, Tel: 858-784-7147, FAX: 858-784-7380,
| | - J. Lindsay Whitton
- Department of Immunology and Microbial Science, SP30-2110, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037, USA, Tel: 858-784-7147, FAX: 858-784-7380,
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27
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Chichlowski M, Hale LP. Bacterial-mucosal interactions in inflammatory bowel disease: an alliance gone bad. Am J Physiol Gastrointest Liver Physiol 2008; 295:G1139-49. [PMID: 18927210 PMCID: PMC2604805 DOI: 10.1152/ajpgi.90516.2008] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The complex interaction of genetic, microbial, and environmental factors may result in continuous activation of the mucosal immune system leading to inflammatory bowel disease (IBD). Most present treatments for IBD involve altering or suppressing the aberrant immune response; however, the role of the intestinal microbiota in the pathophysiology of IBD is becoming more evident. The epithelial layer is essential for the proper functioning of the gastrointestinal tract, and its increased permeability to the luminal antigens may lead to the inflammatory processes and mucosal damage observed in IBD. Factors affecting the efficacy of the epithelial barrier include presence of pathogenic bacteria (e.g., Helicobacter spp.), presence of probiotic bacteria, availability of selected nutrients, and others. Defective function of the mucosal barrier might facilitate the contact of bacterial antigens and adjuvants with innate and adaptive immune cells to generate prolonged inflammatory responses. This review will briefly describe the complex structure of the epithelial barrier in the context of bacterial-mucosal interactions observed in human IBD and mouse models of colitis.
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Affiliation(s)
- Maciej Chichlowski
- Department of Pathology, Duke University Medical Center, Durham, North Carolina
| | - Laura P. Hale
- Department of Pathology, Duke University Medical Center, Durham, North Carolina
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28
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Kabouridis PS, Jury EC. Lipid rafts and T-lymphocyte function: implications for autoimmunity. FEBS Lett 2008; 582:3711-8. [PMID: 18930053 PMCID: PMC2596348 DOI: 10.1016/j.febslet.2008.10.006] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Revised: 10/06/2008] [Accepted: 10/07/2008] [Indexed: 12/11/2022]
Abstract
Experimental evidence indicates that the mammalian cell membrane is compartmentalized. A structural feature that supports membrane segmentation implicates assemblies of selected lipids broadly referred to as lipid rafts. In T-lymphocytes, lipid rafts are implicated in signalling from the T-cell antigen receptor (TCR) and in localization and function of proteins residing proximal to the receptor. This review summarizes the current literature that deals with lipid raft involvement in T-cell activation and places particular emphasis in recent studies investigating lipid rafts in autoimmunity. The potential of lipid rafts as targets for the development of a new class of immune-modulating compounds is discussed.
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Affiliation(s)
- Panagiotis S Kabouridis
- William Harvey Research Institute, Queen Mary's School of Medicine & Dentistry, University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom.
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