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Yan J, Chen Q, Tian L, Li K, Lai W, Bian L, Han J, Jia R, Liu X, Xi Z. Intestinal toxicity of micro- and nano-particles of foodborne titanium dioxide in juvenile mice: Disorders of gut microbiota-host co-metabolites and intestinal barrier damage. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 821:153279. [PMID: 35074372 DOI: 10.1016/j.scitotenv.2022.153279] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 01/09/2022] [Accepted: 01/16/2022] [Indexed: 05/28/2023]
Abstract
The wide use of TiO2 particles in food and the high exposure risk to children have prompted research into the health risks of TiO2. We used the microbiome and targeted metabolomics to explore the potential mechanism of intestinal toxicity of foodborne TiO2 micro-/nanoparticles after oral exposure for 28 days in juvenile mice. Results showed that the gut microbiota-including the abundance of Bacteroides, Bifidobacterium, Lactobacillus, and Prevotella-changed dynamically during exposure. The organic inflammatory response was activated, and lipopolysaccharide levels increased. Intestinal toxicity manifested as increased mucosal permeability, impaired intestinal barrier, immune damage, and pathological changes. The expression of antimicrobial peptides, occludin, and ZO-1 significantly reduced, while that of JNK2 and Src/pSrc increased. Compared with micro-TiO2 particles, the nano-TiO2 particles had strong toxicity. Fecal microbiota transplant confirmed the key role of gut microbiota in intestinal toxicity. The levels of gut microbiota-host co-metabolites, including pyroglutamic acid, L-glutamic acid, phenylacetic acid, and 3-hydroxyphenylacetic acid, changed significantly. Significant changes were observed in the glutathione and propanoate metabolic pathways. There was a significant correlation between the changes in gut microbiota, metabolites, and intestinal cytokine levels. These, together with the intestinal barrier damage signaling pathway, constitute the network mechanism of the intestinal toxicity of TiO2 particles.
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Affiliation(s)
- Jun Yan
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Qi Chen
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Lei Tian
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Kang Li
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Wenqing Lai
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Liping Bian
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Jie Han
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Rui Jia
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Xiaohua Liu
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China.
| | - Zhuge Xi
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China.
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2
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Wang L, Quan Y, Zhu Y, Xie X, Wang Z, Wang L, Wei X, Che F. The regenerating protein 3A: a crucial molecular with dual roles in cancer. Mol Biol Rep 2021; 49:1491-1500. [PMID: 34811636 PMCID: PMC8825409 DOI: 10.1007/s11033-021-06904-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 10/29/2021] [Indexed: 12/20/2022]
Abstract
Introduction REG3A, a member of the third subclass of the Reg family, has been found in a variety of tissues but is not detected in immune cells. In the past decade, it has been determined that REG3A expression is regulated by injury, infection, inflammatory stimuli, and pro-cytokines via different signaling pathways, and it acts as a tissue-repair, bactericidal, and anti-inflammatory molecule in human diseases. Recently, the role of REG3A in cancer has received increasing attention. The present article aims to investigate the structure, expression, regulation, function of REG3A, and to highlight the potential role of REG3A in tumors. Methods A detailed literature search and data organization were conducted to find information about the role of REG3A in variety of physiological functions and tumors. Results Contradictory roles of REG3A have been reported in different tumor models. Some studies have demonstrated that high expression of REG3A in cancers can be oncogenic. Other studies have shown decreased REG3A expression in cancer cells as well as suppressed tumor growth. Conclusions Taken together, better understanding of REG3A may lead to new insights that make it a potentially useful target for cancer therapy.
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Affiliation(s)
- Liying Wang
- Department of Clinlical Medicine, Weifang Medical College, Weifang, China.,Department of Neurology, Linyi People's Hospital, Linyi, China
| | - Yanchun Quan
- Central Laboratory, Linyi People's Hospital, Linyi, China. .,Key Laboratory of Neurophysiology, Linyi People's Hospital, Linyi, Shandong, China. .,Key Laboratory of Tumor Biology, Linyi People's Hospital, Linyi, Shandong, China.
| | - Yanxi Zhu
- Central Laboratory, Linyi People's Hospital, Linyi, China.,Key Laboratory of Neurophysiology, Linyi People's Hospital, Linyi, Shandong, China.,Key Laboratory of Tumor Biology, Linyi People's Hospital, Linyi, Shandong, China
| | - Xiaoli Xie
- Central Laboratory, Linyi People's Hospital, Linyi, China.,Key Laboratory of Neurophysiology, Linyi People's Hospital, Linyi, Shandong, China.,Key Laboratory of Tumor Biology, Linyi People's Hospital, Linyi, Shandong, China
| | - Zhiqiang Wang
- Central Laboratory, Linyi People's Hospital, Linyi, China.,Key Laboratory of Neurophysiology, Linyi People's Hospital, Linyi, Shandong, China.,Key Laboratory of Tumor Biology, Linyi People's Hospital, Linyi, Shandong, China
| | - Long Wang
- Central Laboratory, Linyi People's Hospital, Linyi, China.,Key Laboratory of Neurophysiology, Linyi People's Hospital, Linyi, Shandong, China.,Key Laboratory of Tumor Biology, Linyi People's Hospital, Linyi, Shandong, China
| | - Xiuhong Wei
- Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, Shandong, China
| | - Fengyuan Che
- Department of Neurology, Linyi People's Hospital, Linyi, China. .,Central Laboratory, Linyi People's Hospital, Linyi, China. .,Key Laboratory of Neurophysiology, Linyi People's Hospital, Linyi, Shandong, China. .,Key Laboratory of Tumor Biology, Linyi People's Hospital, Linyi, Shandong, China.
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3
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Mokhtari Y, Pourbagheri‐Sigaroodi A, Zafari P, Bagheri N, Ghaffari SH, Bashash D. Toll-like receptors (TLRs): An old family of immune receptors with a new face in cancer pathogenesis. J Cell Mol Med 2021; 25:639-651. [PMID: 33336901 PMCID: PMC7812258 DOI: 10.1111/jcmm.16214] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/28/2020] [Accepted: 12/02/2020] [Indexed: 02/06/2023] Open
Abstract
In the dark path of tumorigenesis, the more carefully the cancer biology is studied, the more brilliant answers could be given to the countless questions about its orchestrating derivers. The identification of the correlation between Toll-like receptors (TLRs) and different processes involved in carcinogenesis was one of the single points of blinding light highlighting the interconnection between the immune system and cancer. TLRs are a wide family of single-pass membrane-spanning receptors that have developed through the evolution to recognize the structurally conserved molecules derived from microorganisms or damaged cells. But this is not everything about these receptors as they could orchestrate several downstream signalling pathways leading to the formation or suppression of cancer cells. The present review is tempted to provide a concise schematic about the biology and the characters of TLRs and also summarize the major findings of the regulatory role of TLRs and their associated signalling in the pathogenesis of human cancers.
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Affiliation(s)
- Yazdan Mokhtari
- Department of Hematology and Blood BankingSchool of Allied Medical SciencesShahid Beheshti University of Medical SciencesTehranIran
| | - Atieh Pourbagheri‐Sigaroodi
- Department of Hematology and Blood BankingSchool of Allied Medical SciencesShahid Beheshti University of Medical SciencesTehranIran
| | - Parisa Zafari
- Department of ImmunologyFaculty of MedicineMazandaran University of Medical SciencesSariIran
- Student Research CommitteeFaculty of MedicineMazandaran University of Medical SciencesSariIran
| | - Nader Bagheri
- Cellular and Molecular Research CenterBasic Health Sciences InstituteShahrekord University of Medical SciencesShahrekordIran
| | - Seyed H. Ghaffari
- Hematology, Oncology and Stem Cell Transplantation Research CenterShariati HospitalSchool of MedicineTehran University of Medical SciencesTehranIran
| | - Davood Bashash
- Department of Hematology and Blood BankingSchool of Allied Medical SciencesShahid Beheshti University of Medical SciencesTehranIran
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4
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Regenerating islet-derived protein (Reg)3β plays a crucial role in attenuation of ileitis and colitis in mice. Biochem Biophys Rep 2020; 21:100738. [PMID: 32072024 PMCID: PMC7016002 DOI: 10.1016/j.bbrep.2020.100738] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/26/2019] [Accepted: 01/25/2020] [Indexed: 12/16/2022] Open
Abstract
Regenerating islet-derived protein (Reg)3β belongs to a member of the Reg family of proteins and has pleiotropic functions, including antimicrobial activity and tissue repair. However, whether Reg3β plays a protective role in the development of colitis and ileitis has not been fully investigated. We generated transgenic mice expressing a short form of cellular FLICE-inhibitory protein (cFLIPs) that promotes necroptosis, a regulated form of cell death. cFLIPs transgenic (CFLARs Tg) mice develop severe ileitis in utero. Although Reg3β is undetectable in the small intestine of wild-type embryos, its expression is aberrantly elevated in the small intestine of CFLARs Tg embryos. To test whether elevated Reg3β attenuates or exacerbates ileitis in CFLARs Tg mice, we generated a Reg3b−/− strain. Reg3b−/− mice grew to adulthood without apparent abnormalities. Deletion of Reg3b in CFLARs Tg mice exacerbated the embryonic lethality of CFLARs Tg mice. Dextran sulfate sodium-induced colitis, characterized by body weight loss and infiltration of neutrophils, was exacerbated in Reg3b−/− compared to wild-type mice. Moreover, the expression of Interleukin 6, an inflammatory cytokine and Chitinase-like 3, a marker for tissue repair macrophages was elevated in the colon of Reg3b−/− mice compared to wild-type mice after DSS treatment. Together, these results suggest that attenuation of colitis and ileitis is a result of Reg3β′s real function. The expression of Reg3β is elevated in the embryonic small intestine of CFLARs Tg mice. Reg3b−/− mice grow to adulthood without apparent abnormalities. Dextran sulfate sodium-induced colitis is exacerbated in Reg3b−/− mice. Deletion of Reg3b exacerbates ileitis in CFLARs Tg mice.
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Key Words
- Arg1, Arginase-1
- CFLARs Tg, cFLIPs transgenic
- Cellular FLICE-Inhibitory protein
- Chitinase-like 3, Chil3
- Colitis
- DSS, dextran sulfate sodium
- Dextran sulfate sodium
- GFP, green fluorescent protein
- IECs, intestinal epithelial cells
- IL, interleukin
- ILC3, group 3 innate lymphoid cell
- Ileitis
- MLKL, mixed lineage kinase domain–like protein
- Mrc1, Mannose receptor C-type 1
- RIPK, receptor-interacting protein kinase
- RORγt, RAR-related orphan receptor gamma t
- Reg, regenerating islet-derived protein
- Regenerating islet-derived protein
- Retnla, Resistin-like alpha
- STAT, signal transducer and activator of transcription
- cFLIPs and L, cellular FLICE-inhibitory protein, short and long forms
- pSTAT3, phospho-STAT3
- qPCR, quantitative polymerase chain reaction
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5
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Xu X, Fukui H, Ran Y, Wang X, Inoue Y, Ebisudani N, Nishimura H, Tomita T, Oshima T, Watari J, Kiyama H, Miwa H. The Link between Type III Reg and STAT3-Associated Cytokines in Inflamed Colonic Tissues. Mediators Inflamm 2019; 2019:7859460. [PMID: 31780871 PMCID: PMC6875322 DOI: 10.1155/2019/7859460] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 09/10/2019] [Accepted: 09/25/2019] [Indexed: 02/08/2023] Open
Abstract
Reg (regenerating gene) family proteins are known to be overexpressed in gastrointestinal (GI) tissues under conditions of inflammation. However, the pathophysiological significance of Reg family protein overexpression and its regulation is still unclear. In the present study, we investigated the profile of Reg family gene expression in a colitis model and focused on the regulation of Reg IIIβ and IIIγ, which are overexpressed in inflamed colonic mucosa. C57BL/6 mice were administered 2% dextran sulfate sodium (DSS) in drinking water for five days, and their colonic tissues were investigated histopathologically at interval for up to 12 weeks. Gene expression of the Reg family and cytokines (IL-6, IL-17, and IL-22) was evaluated by real-time RT-PCR, and Reg IIIβ/γ expression was examined by immunohistochemistry. The effects of cytokines on STAT3 phosphorylation and HIP/PAP (type III REG) expression in Caco2 and HCT116 cells were examined by Western blot analysis. Among Reg family genes, Reg IIIβ and IIIγ were alternatively overexpressed in the colonic tissues of mice with DSS-induced colitis. The expression of STAT3-associated cytokines (IL-6, IL-17, and IL-22) was also significantly increased in those tissues, being significantly correlated with that of Reg IIIβ/γ. STAT3 phosphorylation and HIP/PAP expression were significantly enhanced in Caco2 cells upon stimulation with IL-6, IL-17, and IL-22. In HCT116 cells, those enhancements were also observed by IL-6 and IL-22 stimulations but not IL-17. The link between type III Reg and STAT3-associated cytokines appears to play a pivotal role in the pathophysiology of DSS-induced colitis.
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Affiliation(s)
- Xin Xu
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin, China
| | - Hirokazu Fukui
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Ying Ran
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin, China
| | - Xuan Wang
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin, China
| | - Yoshihito Inoue
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Nobuhiko Ebisudani
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Heihachiro Nishimura
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Toshihiko Tomita
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Tadayuki Oshima
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Jiro Watari
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Hiroshi Kiyama
- Department of Functional Anatomy and Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroto Miwa
- Division of Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
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6
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Chen Z, Downing S, Tzanakakis ES. Four Decades After the Discovery of Regenerating Islet-Derived (Reg) Proteins: Current Understanding and Challenges. Front Cell Dev Biol 2019; 7:235. [PMID: 31696115 PMCID: PMC6817481 DOI: 10.3389/fcell.2019.00235] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 09/30/2019] [Indexed: 12/15/2022] Open
Abstract
Regenerating islet-derived (Reg) proteins have emerged as multifunctional agents with pro-proliferative, anti-apoptotic, differentiation-inducing and bactericidal properties. Over the last 40 years since first discovered, Reg proteins have been implicated in a gamut of maladies including diabetes, various types of cancer of the digestive tract, and Alzheimer disease. Surprisingly though, a consensus is still absent on the regulation of their expression, and molecular underpinning of their function. Here, we provide a critical appraisal of recent findings in the field of Reg protein biology. Specifically, the structural characteristics are reviewed particularly in connection with established or purported functions of different members of the Reg family. Moreover, Reg expression patterns in different tissues both under normal and pathophysiological conditions are summarized. Putative receptors and cascades reported to relay Reg signaling inciting cellular responses are presented aiming at a better appreciation of the biological activities of the distinct Reg moieties. Challenges are also discussed that have hampered thus far the rapid progress in this field such as the use of non-standard nomenclature for Reg molecules among various research groups, the existence of multiple Reg members with significant degree of homology and possibly compensatory modes of action, and the need for common assays with robust readouts of Reg activity. Coordinated research is warranted going forward, given that several research groups have independently linked Reg proteins to diseased states and raised the possibility that these biomolecules can serve as therapeutic targets and biomarkers.
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Affiliation(s)
- Zijing Chen
- Department of Chemical and Biological Engineering, Tufts University, Medford, MA, United States
| | - Shawna Downing
- Clinical and Translational Science Institute, Tufts Medical Center, Boston, MA, United States
| | - Emmanuel S Tzanakakis
- Department of Chemical and Biological Engineering, Tufts University, Medford, MA, United States.,Clinical and Translational Science Institute, Tufts Medical Center, Boston, MA, United States
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7
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Namikawa K, Dorigo A, Zagrebelsky M, Russo G, Kirmann T, Fahr W, Dübel S, Korte M, Köster RW. Modeling Neurodegenerative Spinocerebellar Ataxia Type 13 in Zebrafish Using a Purkinje Neuron Specific Tunable Coexpression System. J Neurosci 2019; 39:3948-3969. [PMID: 30862666 PMCID: PMC6520513 DOI: 10.1523/jneurosci.1862-18.2019] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 02/19/2019] [Accepted: 02/25/2019] [Indexed: 12/17/2022] Open
Abstract
Purkinje cells (PCs) are primarily affected in neurodegenerative spinocerebellar ataxias (SCAs). For generating animal models for SCAs, genetic regulatory elements specifically targeting PCs are required, thereby linking pathological molecular effects with impaired function and organismic behavior. Because cerebellar anatomy and function are evolutionary conserved, zebrafish represent an excellent model to study SCAs in vivo We have isolated a 258 bp cross-species PC-specific enhancer element that can be used in a bidirectional manner for bioimaging of transgene-expressing PCs in zebrafish (both sexes) with variable copy numbers for tuning expression strength. Emerging ectopic expression at high copy numbers can be further eliminated by repurposing microRNA-mediated posttranslational mRNA regulation.Subsequently, we generated a transgenic SCA type 13 (SCA13) model, using a zebrafish-variant mimicking a human pathological SCA13R420H mutation, resulting in cell-autonomous progressive PC degeneration linked to cerebellum-driven eye-movement deficits as observed in SCA patients. This underscores that investigating PC-specific cerebellar neuropathologies in zebrafish allows for interconnecting bioimaging of disease mechanisms with behavioral analysis suitable for therapeutic compound testing.SIGNIFICANCE STATEMENT SCA13 patients carrying a KCNC3R420H allele have been shown to display mid-onset progressive cerebellar atrophy, but genetic modeling of SCA13 by expressing this pathogenic mutant in different animal models has not resulted in neuronal degeneration so far; likely because the transgene was expressed in heterologous cell types. We developed a genetic system for tunable PC-specific coexpression of several transgenes to manipulate and simultaneously monitor cerebellar PCs. We modeled a SCA13 zebrafish accessible for bioimaging to investigate disease progression, revealing robust PC degeneration, resulting in impaired eye movement. Our transgenic zebrafish mimicking both neuropathological and behavioral changes manifested in SCA-affected patients will be suitable for investigating causes of cerebellar diseases in vivo from the molecular to the behavioral level.
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Affiliation(s)
| | | | - Marta Zagrebelsky
- Cellular Neurobiology, Zoological Institute, Technical University Braunschweig, Braunschweig 38106, Germany
| | - Giulio Russo
- Cellular and Molecular Neurobiology
- Biotechnology and Bioinformatics, Institute for Biochemistry, Technical University Braunschweig 38106, Germany, and
| | | | - Wieland Fahr
- Biotechnology and Bioinformatics, Institute for Biochemistry, Technical University Braunschweig 38106, Germany, and
| | - Stefan Dübel
- Biotechnology and Bioinformatics, Institute for Biochemistry, Technical University Braunschweig 38106, Germany, and
| | - Martin Korte
- Cellular Neurobiology, Zoological Institute, Technical University Braunschweig, Braunschweig 38106, Germany
- Research Group Neuroinflammation and Neurodegeneration, Helmholtz Centre for Infection Research, Braunschweig 38106, Germany
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8
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Shindo R, Ohmuraya M, Komazawa-Sakon S, Miyake S, Deguchi Y, Yamazaki S, Nishina T, Yoshimoto T, Kakuta S, Koike M, Uchiyama Y, Konishi H, Kiyama H, Mikami T, Moriwaki K, Araki K, Nakano H. Necroptosis of Intestinal Epithelial Cells Induces Type 3 Innate Lymphoid Cell-Dependent Lethal Ileitis. iScience 2019; 15:536-551. [PMID: 31132747 PMCID: PMC6538961 DOI: 10.1016/j.isci.2019.05.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 04/12/2019] [Accepted: 05/09/2019] [Indexed: 12/15/2022] Open
Abstract
A short form of cellular FLICE-inhibitory protein encoded by CFLARs promotes necroptosis. Although necroptosis is involved in various pathological conditions, the detailed mechanisms are not fully understood. Here we generated transgenic mice wherein CFLARs was integrated onto the X chromosome. All male CFLARs Tg mice died perinatally due to severe ileitis. Although necroptosis was observed in various tissues of CFLARs Tg mice, large numbers of intestinal epithelial cells (IECs) died by apoptosis. Deletion of Ripk3 or Mlkl, essential genes of necroptosis, prevented both necroptosis and apoptosis, and rescued lethality of CFLARs Tg mice. Type 3 innate lymphoid cells (ILC3s) were activated and recruited to the small intestine along with upregulation of interleukin-22 (Il22) in CFLARs Tg mice. Deletion of ILC3s or Il22 rescued lethality of CFLARs Tg mice by preventing apoptosis, but not necroptosis of IECs. Together, necroptosis-dependent activation of ILC3s induces lethal ileitis in an IL-22-dependent manner. CFLARs Tg mice develop severe ileitis in utero Intestinal epithelial cells die by apoptosis and necroptosis in CFLARs Tg mice Blockade of necroptosis rescues lethality of CFLARs Tg mice Necroptosis activates type 3 innate lymphoid cells, resulting in severe ileitis
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Affiliation(s)
- Ryodai Shindo
- Department of Biochemistry, Toho University School of Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Masaki Ohmuraya
- Department of Genetics, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Sachiko Komazawa-Sakon
- Department of Biochemistry, Toho University School of Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Sanae Miyake
- Department of Biochemistry, Toho University School of Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Yutaka Deguchi
- Department of Biochemistry, Toho University School of Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Soh Yamazaki
- Department of Biochemistry, Toho University School of Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Takashi Nishina
- Department of Biochemistry, Toho University School of Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Takayuki Yoshimoto
- Department of Immunoregulation, Institute of Medical Science, Tokyo Medical University, 6-1-1 Shinjuku-ku, Tokyo 160-8402, Japan
| | - Soichiro Kakuta
- Department of Cellular Molecular Neuropathology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Masato Koike
- Department of Cell Biology and Neuroscience, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Yasuo Uchiyama
- Department of Cellular Molecular Neuropathology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Hiroyuki Konishi
- Department of Functional Anatomy and Neuroscience, Graduate School of Medicine, Nagoya University, 65 Tsurumaicho, Showa-ku, Nagoya 466-8560, Japan
| | - Hiroshi Kiyama
- Department of Functional Anatomy and Neuroscience, Graduate School of Medicine, Nagoya University, 65 Tsurumaicho, Showa-ku, Nagoya 466-8560, Japan
| | - Tetuo Mikami
- Department of Pathology, Toho University School of Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Kenta Moriwaki
- Department of Cell Biology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kimi Araki
- Institute of Resource Development and Analysis, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto 860-0811, Japan
| | - Hiroyasu Nakano
- Department of Biochemistry, Toho University School of Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan; Host Defense Research Center, Toho University School of Medicine, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540, Japan.
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9
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Marcinko MC, Darrow AL, Tuia AJ, Shohet RV. Sex influences susceptibility to methamphetamine cardiomyopathy in mice. Physiol Rep 2019; 7:e14036. [PMID: 30891941 PMCID: PMC6424857 DOI: 10.14814/phy2.14036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 02/18/2019] [Accepted: 02/20/2019] [Indexed: 12/22/2022] Open
Abstract
In this study, we created a mouse model of methamphetamine cardiomyopathy that reproduces the chronic, progressive dosing commonly encountered in addicted subjects. We gradually increased the quantity of methamphetamine given to C57Bl/6 mice from 5 to 40 mg/kg over 2 or 5 months during two study periods. At the fifth month, heart weight was increased, echocardiograms showed a dilated cardiomyopathy and survival was lower in males, with less effect in females. Interestingly, these findings correspond to previous observations in human patients, suggesting greater male susceptibility to the effects of methamphetamine on the heart. Transcriptional analysis showed changes in genes dysregulated in previous methamphetamine neurological studies as well as many that likely play a role in cardiac response to this toxic stress. We expect that a deeper understanding of the molecular biology of methamphetamine exposure in the heart will provide insights into the mechanism of cardiomyopathy in addicts and potential routes to more effective treatment.
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MESH Headings
- Amphetamine-Related Disorders/complications
- Amphetamine-Related Disorders/genetics
- Amphetamine-Related Disorders/metabolism
- Animals
- Cardiomyopathy, Dilated/etiology
- Cardiomyopathy, Dilated/genetics
- Cardiomyopathy, Dilated/metabolism
- Cardiomyopathy, Dilated/physiopathology
- Disease Models, Animal
- Female
- Male
- Methamphetamine
- Mice, Inbred C57BL
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Risk Assessment
- Risk Factors
- Sex Factors
- Time Factors
- Transcription, Genetic
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Affiliation(s)
- Marie C. Marcinko
- Department of MedicineUniversity of Hawaii John A. Burns School of MedicineHonoluluHawaii
| | - April L. Darrow
- Department of MedicineUniversity of Hawaii John A. Burns School of MedicineHonoluluHawaii
| | - Aaron J. Tuia
- Department of MedicineUniversity of Hawaii John A. Burns School of MedicineHonoluluHawaii
| | - Ralph V. Shohet
- Department of MedicineUniversity of Hawaii John A. Burns School of MedicineHonoluluHawaii
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10
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Poynter L, Galea D, Veselkov K, Mirnezami A, Kinross J, Nicholson J, Takáts Z, Darzi A, Mirnezami R. Network Mapping of Molecular Biomarkers Influencing Radiation Response in Rectal Cancer. Clin Colorectal Cancer 2019; 18:e210-e222. [PMID: 30928329 DOI: 10.1016/j.clcc.2019.01.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 11/12/2018] [Accepted: 01/23/2019] [Indexed: 02/07/2023]
Abstract
Preoperative radiotherapy (RT) plays an important role in the management of locally advanced rectal cancer (RC). Tumor regression after RT shows marked variability, and robust molecular methods are needed to help predict likely response. The aim of this study was to review the current published literature and use Gene Ontology (GO) analysis to define key molecular biomarkers governing radiation response in RC. A systematic review of electronic bibliographic databases (Medline, Embase) was performed for original articles published between 2000 and 2015. Biomarkers were then classified according to biological function and incorporated into a hierarchical GO tree. Both significant and nonsignificant results were included in the analysis. Significance was binarized on the basis of univariate and multivariate statistics. Significance scores were calculated for each biological domain (or node), and a direct acyclic graph was generated for intuitive mapping of biological pathways and markers involved in RC radiation response. Seventy-two individual biomarkers across 74 studies were identified. On highest-order classification, molecular biomarkers falling within the domains of response to stress, cellular metabolism, and pathways inhibiting apoptosis were found to be the most influential in predicting radiosensitivity. Homogenizing biomarker data from original articles using controlled GO terminology demonstrated that cellular mechanisms of response to RT in RC-in particular the metabolic response to RT-may hold promise in developing radiotherapeutic biomarkers to help predict, and in the future modulate, radiation response.
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Affiliation(s)
- Liam Poynter
- Department of Surgery & Cancer, Imperial College London, London, UK
| | - Dieter Galea
- Computational & Systems Medicine, Imperial College London, London, UK
| | - Kirill Veselkov
- Computational & Systems Medicine, Imperial College London, London, UK
| | | | - James Kinross
- Department of Surgery & Cancer, Imperial College London, London, UK
| | - Jeremy Nicholson
- Computational & Systems Medicine, Imperial College London, London, UK
| | - Zoltán Takáts
- Computational & Systems Medicine, Imperial College London, London, UK
| | - Ara Darzi
- Department of Surgery & Cancer, Imperial College London, London, UK
| | - Reza Mirnezami
- Department of Surgery & Cancer, Imperial College London, London, UK; St Mark's Hospital and Academic Institute, Harrow, London, UK.
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Motor Nerve Arborization Requires Proteolytic Domain of Damage-Induced Neuronal Endopeptidase (DINE) during Development. J Neurosci 2017; 36:4744-57. [PMID: 27122033 DOI: 10.1523/jneurosci.3811-15.2016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Accepted: 03/14/2016] [Indexed: 01/23/2023] Open
Abstract
UNLABELLED Damage-induced neuronal endopeptidase (DINE)/endothelin-converting enzyme-like 1 (ECEL1) is a membrane-bound metalloprotease, which we originally identified as a nerve regeneration-associated molecule. Abundant expression of DINE is observed in regenerating neurons, as well as in developing spinal motor neurons. In line with this, DINE-deficient (DINE KO) embryos fail to arborize phrenic motor nerves in the diaphragm and to form proper neuromuscular junctions (NMJ), which lead to death shortly after birth. However, it is unclear whether protease activity of DINE is involved in motor nerve terminal arborization and how DINE participates in the process. To address these issues, we performed an in vivo rescue experiment in which three types of motor-neuron specific DINE transgenic mice were crossed with DINE KO mice. The DINE KO mice, which overexpressed wild-type DINE in motor neurons, succeeded in rescuing the aberrant nerve terminal arborization and lethality after birth, while those overexpressing two types of protease domain-mutated DINE failed. Further histochemical analysis showed abnormal behavior of immature Schwann cells along the DINE-deficient axons. Coculture experiments of motor neurons and Schwann cells ensured that the protease domain of neuronal DINE was required for proper alignment of immature Schwann cells along the axon. These findings suggest that protease activity of DINE is crucial for intramuscular innervation of motor nerves and subsequent NMJ formation, as well as proper control of interactions between axons and immature Schwann cells. SIGNIFICANCE STATEMENT Damage-induced neuronal endopeptidase (DINE) is a membrane-bound metalloprotease; expression is abundant in developing spinal motor neurons, as well as in nerve-injured neurons. DINE-deficient (KO) embryos fail to arborize phrenic motor nerves in the diaphragm and to form a neuromuscular junction, leading to death immediately after birth. To address whether proteolytic activity of DINE is involved in this process, we performed in vivo rescue experiments with DINE KO mice. Transgenic rescue of DINE KO mice was accomplished by overexpression of wild-type DINE, but not by protease domain-mutated DINE. Immature Schwann cells were abnormally aligned along the DINE protease-deficient axons. Thus, the protease activity of DINE is crucial for motor axon arborization, as well as the interaction between axons and immature Schwann cells.
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12
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Shaqura M, Li X, Al-Khrasani M, Shakibaei M, Tafelski S, Fürst S, Beyer A, Kawata M, Schäfer M, Mousa SA. Membrane-bound glucocorticoid receptors on distinct nociceptive neurons as potential targets for pain control through rapid non-genomic effects. Neuropharmacology 2016; 111:1-13. [DOI: 10.1016/j.neuropharm.2016.08.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 07/14/2016] [Accepted: 08/16/2016] [Indexed: 12/23/2022]
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13
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Dupont A, Sommer F, Zhang K, Repnik U, Basic M, Bleich A, Kühnel M, Bäckhed F, Litvak Y, Fulde M, Rosenshine I, Hornef MW. Age-Dependent Susceptibility to Enteropathogenic Escherichia coli (EPEC) Infection in Mice. PLoS Pathog 2016; 12:e1005616. [PMID: 27159323 PMCID: PMC4861285 DOI: 10.1371/journal.ppat.1005616] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 04/15/2016] [Indexed: 01/14/2023] Open
Abstract
Enteropathogenic Escherichia coli (EPEC) represents a major causative agent of infant diarrhea associated with significant morbidity and mortality in developing countries. Although studied extensively in vitro, the investigation of the host-pathogen interaction in vivo has been hampered by the lack of a suitable small animal model. Using RT-PCR and global transcriptome analysis, high throughput 16S rDNA sequencing as well as immunofluorescence and electron microscopy, we characterize the EPEC-host interaction following oral challenge of newborn mice. Spontaneous colonization of the small intestine and colon of neonate mice that lasted until weaning was observed. Intimate attachment to the epithelial plasma membrane and microcolony formation were visualized only in the presence of a functional bundle forming pili (BFP) and type III secretion system (T3SS). Similarly, a T3SS-dependent EPEC-induced innate immune response, mediated via MyD88, TLR5 and TLR9 led to the induction of a distinct set of genes in infected intestinal epithelial cells. Infection-induced alterations of the microbiota composition remained restricted to the postnatal period. Although EPEC colonized the adult intestine in the absence of a competing microbiota, no microcolonies were observed at the small intestinal epithelium. Here, we introduce the first suitable mouse infection model and describe an age-dependent, virulence factor-dependent attachment of EPEC to enterocytes in vivo.
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Affiliation(s)
- Aline Dupont
- Institute for Medical Microbiology, RWTH Aachen University Hospital, Aachen, Germany
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
- * E-mail: (AD); (MWH)
| | - Felix Sommer
- The Wallenberg Laboratory, Department of Molecular and Clinical Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Kaiyi Zhang
- Institute for Medical Microbiology, RWTH Aachen University Hospital, Aachen, Germany
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - Urska Repnik
- Department of Biosciences, University of Oslo, Oslo, Norway
| | - Marijana Basic
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - André Bleich
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Mark Kühnel
- Institute for Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Fredrik Bäckhed
- The Wallenberg Laboratory, Department of Molecular and Clinical Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Yael Litvak
- Department for Microbiology and Molecular Genetics, Institute of Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Marcus Fulde
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - Ilan Rosenshine
- Department for Microbiology and Molecular Genetics, Institute of Medical Research Israel-Canada, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Mathias W. Hornef
- Institute for Medical Microbiology, RWTH Aachen University Hospital, Aachen, Germany
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
- * E-mail: (AD); (MWH)
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14
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Shaqura M, Li X, Al-Madol MA, Tafelski S, Beyer-Koczorek A, Mousa SA, Schäfer M. Acute mechanical sensitization of peripheral nociceptors by aldosterone through non-genomic activation of membrane bound mineralocorticoid receptors in naive rats. Neuropharmacology 2016; 107:251-261. [PMID: 27016023 DOI: 10.1016/j.neuropharm.2016.03.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 03/16/2016] [Accepted: 03/21/2016] [Indexed: 12/24/2022]
Abstract
Recently, there is increasing interest in the role of peripheral mineralocorticoid receptors (MR) to modulate pain, but their localization in neurons and glia of the periphery and their distinct involvement in pain control remains elusive. In naive Wistar rats our double immunofluorescence confocal microscopy of the spinal cord, dorsal root ganglia, sciatic nerve and innervated skin revealed that MR predominantly colocalized with calcitonin-gene-related peptide (CGRP)- and trkA-immunoreactive (IR) nociceptive neurons and only marginally with myelinated trkB-IR mechanoreceptive and trkC-IR proprioreceptive neurons underscoring a pivotal role for MR in the modulation of pain. MR could not be detected in Schwann cells, satellite cells, and astrocytes and only scarcely in spinal microglia cells excluding a relevant functional role of glia-derived MR at least in naïve rats. Intrathecal (i.t.) and intraplantar (i.pl.) application of increasing doses of the MR selective agonist aldosterone acutely increased nociceptive behavior which was reversible by a MR selective antagonist and most likely due to non-genomic effects. This was further substantiated by the first identification of membrane bound MR specific binding sites in sensory neurons of dorsal root ganglia and spinal cord. Therefore, a crucial role of MR on nociceptive neurons but not on glia cells and their impact on nociceptive behavior most likely due to immediate non-genomic effects has to be considered under normal but more so under pathological conditions in future studies.
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Affiliation(s)
- Mohammed Shaqura
- Department of Anaesthesiology and Intensive Care Medicine, Charité University Berlin, Campus Virchow Klinikum and Campus Charité Mitte, Berlin, Germany
| | - Xiongjuan Li
- Department of Anaesthesiology and Intensive Care Medicine, Charité University Berlin, Campus Virchow Klinikum and Campus Charité Mitte, Berlin, Germany
| | - Mohammed A Al-Madol
- Department of Anaesthesiology and Intensive Care Medicine, Charité University Berlin, Campus Virchow Klinikum and Campus Charité Mitte, Berlin, Germany
| | - Sascha Tafelski
- Department of Anaesthesiology and Intensive Care Medicine, Charité University Berlin, Campus Virchow Klinikum and Campus Charité Mitte, Berlin, Germany
| | - Antje Beyer-Koczorek
- Department of Anaesthesiology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Shaaban A Mousa
- Department of Anaesthesiology and Intensive Care Medicine, Charité University Berlin, Campus Virchow Klinikum and Campus Charité Mitte, Berlin, Germany.
| | - Michael Schäfer
- Department of Anaesthesiology and Intensive Care Medicine, Charité University Berlin, Campus Virchow Klinikum and Campus Charité Mitte, Berlin, Germany
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15
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Spencer JD, Jackson AR, Li B, Ching CB, Vonau M, Easterling RS, Schwaderer AL, McHugh KM, Becknell B. Expression and Significance of the HIP/PAP and RegIIIγ Antimicrobial Peptides during Mammalian Urinary Tract Infection. PLoS One 2015; 10:e0144024. [PMID: 26658437 PMCID: PMC4675559 DOI: 10.1371/journal.pone.0144024] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 10/11/2015] [Indexed: 12/22/2022] Open
Abstract
Recent evidence indicates that antimicrobial peptides (AMPs) serve key roles in defending the urinary tract against invading uropathogens. To date, the individual contribution of AMPs to urinary tract host defense is not well defined. In this study, we identified Regenerating islet-derived 3 gamma (RegIIIγ) as the most transcriptionally up-regulated AMP in murine bladder transcriptomes following uropathogenic Escherichia coli (UPEC) infection. We confirmed induction of RegIIIγ mRNA during cystitis and pyelonephritis by quantitative RT-PCR. Immunoblotting demonstrates increased bladder and urinary RegIIIγ protein levels following UPEC infection. Immunostaining localizes RegIIIγ protein to urothelial cells of infected bladders and kidneys. Human patients with UTI have increased urine concentrations of the orthologous Hepatocarcinoma-Intestine-Pancreas / Pancreatitis Associated Protein (HIP/PAP) compared to healthy controls. Recombinant RegIIIγ protein does not demonstrate bactericidal activity toward UPEC in vitro, but does kill Staphylococcus saprophyticus in a dose-dependent manner. Kidney and bladder tissue from RegIIIγ knockout mice and wild-type mice contain comparable bacterial burden following UPEC and Gram-positive UTI. Our results demonstrate that RegIIIγ and HIP/PAP expression is induced during human and murine UTI. However, their specific function in the urinary tract remains uncertain.
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Affiliation(s)
- John David Spencer
- Division of Nephrology, Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
- Center for Clinical and Translational Research, Research Institute at Nationwide Children’s, Columbus, Ohio, United States of America
| | - Ashley R. Jackson
- Biomedical Sciences Graduate Program, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
| | - Birong Li
- Center for Clinical and Translational Research, Research Institute at Nationwide Children’s, Columbus, Ohio, United States of America
| | - Christina B. Ching
- Division of Urology, Department of Surgery, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
| | - Martin Vonau
- Department of Pediatrics and Internal Medicine, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
| | | | - Andrew L. Schwaderer
- Division of Nephrology, Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
- Center for Clinical and Translational Research, Research Institute at Nationwide Children’s, Columbus, Ohio, United States of America
| | - Kirk M. McHugh
- Department of Anatomy, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
- Center for Molecular and Human Genetics, Research Institute at Nationwide Children’s, Columbus, Ohio, United States of America
| | - Brian Becknell
- Division of Nephrology, Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio, United States of America
- Center for Clinical and Translational Research, Research Institute at Nationwide Children’s, Columbus, Ohio, United States of America
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16
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Sajgo S, Ali S, Popescu O, Badea TC. Dynamic expression of transcription factor Brn3b during mouse cranial nerve development. J Comp Neurol 2015; 524:1033-61. [PMID: 26356988 DOI: 10.1002/cne.23890] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 08/18/2015] [Accepted: 08/31/2015] [Indexed: 01/23/2023]
Abstract
During development, transcription factor combinatorial codes define a large variety of morphologically and physiologically distinct neurons. Such a combinatorial code has been proposed for the differentiation of projection neurons of the somatic and visceral components of cranial nerves. It is possible that individual neuronal cell types are not specified by unique transcription factors but rather emerge through the intersection of their expression domains. Brn3a, Brn3b, and Brn3c, in combination with each other and/or transcription factors of other families, can define subgroups of retinal ganglion cells (RGC), spiral and vestibular ganglia, inner ear and vestibular hair cell neurons in the vestibuloacoustic system, and groups of somatosensory neurons in the dorsal root ganglia. The present study investigates the expression and potential role of the Brn3b transcription factor in cranial nerves and associated nuclei of the brainstem. We report the dynamic expression of Brn3b in the somatosensory component of cranial nerves II, V, VII, and VIII and visceromotor nuclei of nerves VII, IX, and X as well as other brainstem nuclei during different stages of development into adult stage. We find that genetically identified Brn3b(KO) RGC axons show correct but delayed pathfinding during the early stages of embryonic development. However, loss of Brn3b does not affect the anatomy of the other cranial nerves normally expressing this transcription factor.
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Affiliation(s)
- Szilard Sajgo
- National Eye Institute, National Institutes of Health, Bethesda, Maryland, 20892.,Molecular Biology Center, Interdisciplinary Research Institute on Bio-Nano-Science, Babes-Bolyai University, Cluj-Napoca, Cluj, 400084, Romania
| | - Seid Ali
- National Eye Institute, National Institutes of Health, Bethesda, Maryland, 20892
| | - Octavian Popescu
- Molecular Biology Center, Interdisciplinary Research Institute on Bio-Nano-Science, Babes-Bolyai University, Cluj-Napoca, Cluj, 400084, Romania.,Institute of Biology, Romanian Academy, Bucharest, 060031, Romania
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17
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Fu Y, Yu Y, Paxinos G, Watson C, Rusznák Z. Aging-dependent changes in the cellular composition of the mouse brain and spinal cord. Neuroscience 2015; 290:406-20. [DOI: 10.1016/j.neuroscience.2015.01.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/21/2014] [Accepted: 01/08/2015] [Indexed: 01/09/2023]
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18
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Kopp ZA, Jain U, Van Limbergen J, Stadnyk AW. Do antimicrobial peptides and complement collaborate in the intestinal mucosa? Front Immunol 2015; 6:17. [PMID: 25688244 PMCID: PMC4311685 DOI: 10.3389/fimmu.2015.00017] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 01/08/2015] [Indexed: 12/13/2022] Open
Abstract
It is well understood that multiple antimicrobial peptides (AMPs) are constitutively deployed by the epithelium to bolster the innate defenses along the entire length of the intestines. In addition to this constitutive/homeostatic production, AMPs may be inducible and levels changed during disease. In contrast to this level of knowledge on AMP sources and roles in the intestines, our understanding of the complement cascade in the healthy and diseased intestines is rudimentary. Epithelial cells make many complement proteins and there is compelling evidence that complement becomes activated in the lumen. With the common goal of defending the host against microbes, the opportunities for cross-talk between these two processes is great, both in terms of actions on the target microbes but also on regulating the synthesis and secretion of the alternate family of molecules. This possibility is beginning to become apparent with the finding that colonic epithelial cells possess anaphylatoxin receptors. There still remains much to be learned about the possible points of collaboration between AMPs and complement, for example, whether there is reciprocal control over expression in the intestinal mucosa in homeostasis and restoring the balance following infection and inflammation.
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Affiliation(s)
- Zoë A Kopp
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University , Halifax, NS , Canada
| | - Umang Jain
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University , Halifax, NS , Canada
| | - Johan Van Limbergen
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University , Halifax, NS , Canada ; Department of Pediatrics, Faculty of Medicine, Dalhousie University , Halifax, NS , Canada
| | - Andrew W Stadnyk
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University , Halifax, NS , Canada ; Department of Pediatrics, Faculty of Medicine, Dalhousie University , Halifax, NS , Canada
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Hemmerling J, Heller K, Hörmannsperger G, Bazanella M, Clavel T, Kollias G, Haller D. Fetal exposure to maternal inflammation does not affect postnatal development of genetically-driven ileitis and colitis. PLoS One 2014; 9:e98237. [PMID: 24849654 PMCID: PMC4029898 DOI: 10.1371/journal.pone.0098237] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2013] [Accepted: 04/29/2014] [Indexed: 12/19/2022] Open
Abstract
Background: Chronic inflammatory disorders have been increasing in incidence over the past decades following geographical patterns of industrialization. Fetal exposure to maternal inflammation may alter organ functions and the offspring's disease risk. We studied the development of genetically-driven ileitis and colitis in response to maternal inflammation using mouse models. Methods: Disease susceptible (TnfΔARE/+ and IL10−/−) and disease-free (Tnf+/+ and IL10−/+) offspring were raised in inflamed and non-inflamed dams. Ileal, caecal and colonic pathology was evaluated in the offspring at 8 or 12 weeks of age. Ly6G-positive cells in inflamed sections from the distal ileum and distal colon were analysed by immunofluorescence microscopy. Gene expression of pro-inflammatory cytokines was measured in whole tissue specimens by quantitative PCR. Microarray analyses were performed on laser microdissected intestinal epithelium. Caecal bacterial communities were assessed by Illumina sequencing of 16S rRNA amplicons. Results: Disease severity, the number of infiltrated neutrophils as well as Tnf and Il12p40 mRNA expression were independent of maternal inflammation in the offspring of mouse models for ileitis (TnfΔARE/+) and colitis (IL10−/−). Although TNF-driven maternal inflammation regulated 2,174 (wild type) and 3,345 (TnfΔARE/+) genes in the fetal epithelium, prenatal gene expression patterns were completely overwritten after birth. In addition, co-housing experiments revealed no change in phylogenetic diversity of the offspring's caecal microbiota in response to maternal inflammation. This is independent of the offspring's genotype before and after the onset of tissue pathology. Conclusions: Disease risk and activity in mouse models of chronic ileitis and colitis was independent of the fetal exposure to maternal inflammation. Likewise, maternal inflammation did not alter the diversity and composition of offspring's caecal microbiota, clearly demonstrating that changes of the gene expression program in the fetal gut epithelium were not relevant for the development of chronic inflammatory disorders in the gut.
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Affiliation(s)
- Jana Hemmerling
- Chair of Nutrition and Immunology, Technische Universität München, Freising- Weihenstephan, Bavaria, Germany
- ZIEL - Research Center for Nutrition and Food Sciences, Freising-Weihenstephan, Bavaria, Germany
| | - Katharina Heller
- Chair of Nutrition and Immunology, Technische Universität München, Freising- Weihenstephan, Bavaria, Germany
- ZIEL - Research Center for Nutrition and Food Sciences, Freising-Weihenstephan, Bavaria, Germany
| | - Gabriele Hörmannsperger
- Chair of Nutrition and Immunology, Technische Universität München, Freising- Weihenstephan, Bavaria, Germany
- ZIEL - Research Center for Nutrition and Food Sciences, Freising-Weihenstephan, Bavaria, Germany
| | - Monika Bazanella
- Chair of Nutrition and Immunology, Technische Universität München, Freising- Weihenstephan, Bavaria, Germany
- ZIEL - Research Center for Nutrition and Food Sciences, Freising-Weihenstephan, Bavaria, Germany
| | - Thomas Clavel
- Chair of Nutrition and Immunology, Technische Universität München, Freising- Weihenstephan, Bavaria, Germany
- ZIEL - Research Center for Nutrition and Food Sciences, Freising-Weihenstephan, Bavaria, Germany
| | - George Kollias
- Biomedical Sciences Research Centre, Institute for Immunology, Alexander Fleming, Vari, Athens, Greece
| | - Dirk Haller
- Chair of Nutrition and Immunology, Technische Universität München, Freising- Weihenstephan, Bavaria, Germany
- ZIEL - Research Center for Nutrition and Food Sciences, Freising-Weihenstephan, Bavaria, Germany
- * E-mail: .
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20
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Differential induction of antimicrobial REGIII by the intestinal microbiota and Bifidobacterium breve NCC2950. Appl Environ Microbiol 2013; 79:7745-54. [PMID: 24096422 DOI: 10.1128/aem.02470-13] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The intestinal microbiota is a key determinant of gut homeostasis, which is achieved, in part, through regulation of antimicrobial peptide secretion. The aim of this study was to determine the efficiency by which members of the intestinal microbiota induce the antimicrobial peptide REGIII and to elucidate the underlying pathways. We showed that germfree mice have low levels of REGIII-γ in their ileum and colon compared to mice with different intestinal microbiota backgrounds. Colonization with a microbiota of low diversity (altered Schaedler flora) did not induce the expression of REGIII-γ as effectively as a complex community (specific pathogen free). Monocolonization with the probiotic Bifidobacterium breve, but not with the nonprobiotic commensal Escherichia coli JM83, upregulated REGIII-γ expression. Induction of REGIII-γ by B. breve was abrogated in mice lacking MyD88 and Ticam1 signaling. Both live and heat-inactivated B. breve but not spent culture medium from B. breve induced the expression of REGIII-α, the human ortholog and homolog of REGIII-γ, in human colonic epithelial cells (Caco-2). Taken together, the results suggest that REGIII-γ expression in the intestine correlates with the richness of microbiota composition. Also, specific bacteria such as Bifidobacterium breve NCC2950 effectively induce REGIII production in the intestine via the MyD88-Ticam1 pathway. Treatment with this probiotic may enhance the mucosal barrier and protect the host from infection and inflammation.
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Parikh A, Stephan AF, Tzanakakis ES. Regenerating proteins and their expression, regulation and signaling. Biomol Concepts 2011; 3:57-70. [PMID: 22582090 DOI: 10.1515/bmc.2011.055] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The regenerating (Reg) protein family comprises C-type lectin-like proteins discovered independently during pancreatitis and pancreatic islet regeneration. However, an increasing number of studies provide evidence of participation of Reg proteins in the proliferation and differentiation of diverse cell types. Moreover, Reg family members are associated with various pathologies, including diabetes and forms of gastrointestinal cancer. These findings have led to the emergence of key roles for Reg proteins as anti-inflammatory, antiapoptotic and mitogenic agents in multiple physiologic and disease contexts. Yet, there are significant gaps in our knowledge regarding the regulation of expression of different Reg genes. In addition, the pathways relaying Reg-triggered signals, their targets and potential cross-talk with other cascades are still largely unknown. In this review, the expression patterns of different Reg members in the pancreas and extrapancreatic tissues are described. Moreover, factors known to modulate Reg levels in different cell types are discussed. Several signaling pathways, which have been implicated in conferring the effects of Reg ligands to date, are also delineated. Further efforts are necessary for elucidating the biological processes underlying the action of Reg proteins and their involvement in various maladies. Better understanding of the function of Reg genes and proteins will be beneficial in the design and development of therapies utilizing or targeting this protein group.
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Affiliation(s)
- Abhirath Parikh
- Department of Chemical and Biological Engineering, State University of New York at Buffalo, Buffalo, NY 14260
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Hodin CM, Lenaerts K, Grootjans J, de Haan JJ, Hadfoune M, Verheyen FK, Kiyama H, Heineman E, Buurman WA. Starvation compromises Paneth cells. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 179:2885-93. [PMID: 21986443 DOI: 10.1016/j.ajpath.2011.08.030] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2011] [Revised: 08/23/2011] [Accepted: 08/29/2011] [Indexed: 01/05/2023]
Abstract
Lack of enteral feeding, with or without parenteral nutritional support, is associated with increased intestinal permeability and translocation of bacteria. Such translocation is thought to be important in the high morbidity and mortality rates of patients who receive nothing by mouth. Recently, Paneth cells, important constituents of innate intestinal immunity, were found to be crucial in host protection against invasion of both commensal and pathogenic bacteria. This study investigates the influence of food deprivation on Paneth cell function in a mouse starvation model. Quantitative PCR showed significant decreases in mRNA expression of typical Paneth cell antimicrobials, lysozyme, cryptdin, and RegIIIγ, in ileal tissue after 48 hours of food deprivation. Protein expression levels of lysozyme and RegIIIγ precursor were also significantly diminished, as shown by Western blot analysis and IHC. Late degenerative autophagolysosomes and aberrant Paneth cell granules in starved mice were evident by electron microscopy, Western blot analysis, and quantitative PCR. Furthermore, increased bacterial translocation to mesenteric lymph nodes coincided with Paneth cell abnormalities. The current study demonstrates the occurrence of Paneth cell abnormalities during enteral starvation. Such changes may contribute to loss of epithelial barrier function, causing the apparent bacterial translocation in enteral starvation.
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Affiliation(s)
- Caroline M Hodin
- Department of Surgery, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center, Maastricht, The Netherlands
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