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Yu X, Li W, Li Z, Wu Q, Sun S. Influence of Microbiota on Tumor Immunotherapy. Int J Biol Sci 2024; 20:2264-2294. [PMID: 38617537 PMCID: PMC11008264 DOI: 10.7150/ijbs.91771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 03/26/2024] [Indexed: 04/16/2024] Open
Abstract
The role of the microbiome in immunotherapy has recently garnered substantial attention, with molecular studies and clinical trials providing emerging evidence on the pivotal influence of the microbiota in enhancing therapeutic outcomes via immune response modulation. However, the impact of microbial communities can considerably vary across individuals and different immunotherapeutic approaches, posing prominent challenges in harnessing their potential. In this comprehensive review, we outline the current research applications in tumor immunotherapy and delve into the possible mechanisms through which immune function is influenced by microbial communities in various body sites, encompassing those in the gut, extraintestinal barrier, and intratumoral environment. Furthermore, we discuss the effects of diverse microbiome-based strategies, including probiotics, prebiotics, fecal microbiota transplantation, and the targeted modulation of specific microbial taxa, and antibiotic treatments on cancer immunotherapy. All these strategies potentially have a profound impact on immunotherapy and pave the way for personalized therapeutic approaches and predictive biomarkers.
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Affiliation(s)
- Xin Yu
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Wenge Li
- Department of Oncology, Shanghai Artemed Hospital, Shanghai, P. R. China
| | - Zhi Li
- Department of Orthopedics, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui, P. R. China
| | - Qi Wu
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, P. R. China
| | - Shengrong Sun
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
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Ren W, Chen J, Wang W, Li Q, Yin X, Zhuang G, Zhou H, Zeng W. Sympathetic nerve-enteroendocrine L cell communication modulates GLP-1 release, brain glucose utilization, and cognitive function. Neuron 2024; 112:972-990.e8. [PMID: 38242116 DOI: 10.1016/j.neuron.2023.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 10/26/2023] [Accepted: 12/18/2023] [Indexed: 01/21/2024]
Abstract
Glucose homeostasis is controlled by brain-gut communications. Yet our understanding of the neuron-gut interface in the glucoregulatory system remains incomplete. Here, we find that sympathetic nerves elevate postprandial blood glucose but restrict brain glucose utilization by repressing the release of glucagon-like peptide-1 (GLP-1) from enteroendocrine L cells. Sympathetic nerves are in close apposition with the L cells. Importantly, sympathetic denervation or intestinal deletion of the adrenergic receptor α2 (Adra2a) augments postprandial GLP-1 secretion, leading to reduced blood glucose levels and increased brain glucose uptake. Conversely, sympathetic activation shows the opposite effects. At the cellular level, adrenergic signaling suppresses calcium flux to limit GLP-1 secretion upon sugar ingestion. Consequently, abrogation of adrenergic signal results in a significant improvement in learning and memory ability. Together, our results reveal a sympathetic nerve-enteroendocrine unit in constraining GLP-1 secretion, thus providing a therapeutic nexus of mobilizing endogenous GLP-1 for glucose management and cognitive improvement.
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Affiliation(s)
- Wenran Ren
- Institute for Immunology and School of Medicine, Tsinghua University, and Tsinghua-Peking Center for Life Sciences, Beijing 100084, China; Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing 100084, China
| | - Jianhui Chen
- Institute for Immunology and School of Medicine, Tsinghua University, and Tsinghua-Peking Center for Life Sciences, Beijing 100084, China; Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing 100084, China
| | - Wenjing Wang
- Shanghai Key Laboratory of Gynecologic Oncology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Qingqing Li
- Institute for Immunology and School of Medicine, Tsinghua University, and Tsinghua-Peking Center for Life Sciences, Beijing 100084, China; Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing 100084, China
| | - Xia Yin
- Shanghai Key Laboratory of Gynecologic Oncology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Guanglei Zhuang
- Shanghai Key Laboratory of Gynecologic Oncology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Hong Zhou
- Department of Gastrointestinal Surgery, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
| | - Wenwen Zeng
- Institute for Immunology and School of Medicine, Tsinghua University, and Tsinghua-Peking Center for Life Sciences, Beijing 100084, China; SXMU-Tsinghua Collaborative Innovation Center for Frontier Medicine, Shanxi Medical University, Taiyuan 030001, Shanxi, China; Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing 100084, China.
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Schonkeren SL, Thijssen MS, Idris M, Wouters K, de Vaan J, Teubner A, Gijbels MJ, Boesmans W, Melotte V. Differences in enteric neuronal density in the NSE-Noggin mouse model across institutes. Sci Rep 2024; 14:3686. [PMID: 38355947 PMCID: PMC10866904 DOI: 10.1038/s41598-024-54337-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 02/12/2024] [Indexed: 02/16/2024] Open
Abstract
The enteric nervous system (ENS) is a large and complex part of the peripheral nervous system, and it is vital for gut homeostasis. To study the ENS, different hyper- and hypo-innervated model systems have been developed. The NSE-Noggin mouse model was described as one of the few models with a higher enteric neuronal density in the colon. However, in our hands NSE-Noggin mice did not present with a hyperganglionic phenotype. NSE-Noggin mice were phenotyped based on fur appearance, genotyped and DNA sequenced to demonstrate transgene and intact NSE-Noggin-IRES-EGFP construct presence, and RNA expression of Noggin was shown to be upregulated. Positive EGFP staining in the plexus of NSE-Noggin mice also confirmed Noggin protein expression. Myenteric plexus preparations of the colon were examined to quantify both the overall density of enteric neurons and the proportions of enteric neurons expressing specific subtype markers. The total number of enteric neurons in the colonic myenteric plexus of transgenic mice did not differ significantly from wild types, nor did the proportion of calbindin, calretinin, or serotonin immunoreactive myenteric neurons. Possible reasons as to why the hyperinnervated phenotype could not be observed in contrast with original studies using this mouse model are discussed, including study design, influence of microbiota, and other environmental variables.
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Affiliation(s)
- Simone L Schonkeren
- Department of Pathology, GROW-Research Institute for Oncology and Reproduction, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Meike S Thijssen
- Department of Pathology, GROW-Research Institute for Oncology and Reproduction, Maastricht University Medical Center, Maastricht, The Netherlands
- Biomedical Research Institute (BIOMED), Hasselt University, Hasselt, Belgium
| | - Musa Idris
- Department of Pathology, GROW-Research Institute for Oncology and Reproduction, Maastricht University Medical Center, Maastricht, The Netherlands
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Kim Wouters
- Department of Pathology, GROW-Research Institute for Oncology and Reproduction, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Joëlle de Vaan
- Department of Pathology, GROW-Research Institute for Oncology and Reproduction, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Andreas Teubner
- Central Animal Facility, Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Marion J Gijbels
- Department of Pathology, GROW-Research Institute for Oncology and Reproduction, Maastricht University Medical Center, Maastricht, The Netherlands
- Department of Medical Biochemistry, Amsterdam Cardiovascular Sciences: Atherosclerosis & Ischemic Syndrome, Amsterdam Infection and Immunity: Inflammatory Diseases, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
| | - Werend Boesmans
- Department of Pathology, GROW-Research Institute for Oncology and Reproduction, Maastricht University Medical Center, Maastricht, The Netherlands
- Biomedical Research Institute (BIOMED), Hasselt University, Hasselt, Belgium
| | - Veerle Melotte
- Department of Pathology, GROW-Research Institute for Oncology and Reproduction, Maastricht University Medical Center, Maastricht, The Netherlands.
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands.
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Chen BN, Humenick AG, Hibberd TJ, Yew WP, Wattchow DA, Dinning PG, Costa M, Spencer NJ, Brookes SJH. Characterization of viscerofugal neurons in human colon by retrograde tracing and multi-layer immunohistochemistry. Front Neurosci 2024; 17:1313057. [PMID: 38292899 PMCID: PMC10825022 DOI: 10.3389/fnins.2023.1313057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 12/15/2023] [Indexed: 02/01/2024] Open
Abstract
Background and Aims Viscerofugal neurons (VFNs) have cell bodies in the myenteric plexus and axons that project to sympathetic prevertebral ganglia. In animals they activate sympathetic motility reflexes and may modulate glucose metabolism and feeding. We used rapid retrograde tracing from colonic nerves to identify VFNs in human colon for the first time, using ex vivo preparations with multi-layer immunohistochemistry. Methods Colonic nerves were identified in isolated preparations of human colon and set up for axonal tracing with biotinamide. After fixation, labeled VFN cell bodies were subjected to multiplexed immunohistochemistry for 12 established nerve cell body markers. Results Biotinamide tracing filled 903 viscerofugal nerve cell bodies (n = 23), most of which (85%) had axons projecting orally before entering colonic nerves. Morphologically, 97% of VFNs were uni-axonal. Of 215 VFNs studied in detail, 89% expressed ChAT, 13% NOS, 13% calbindin, 9% enkephalin, 7% substance P and 0 of 123 VFNs expressed CART. Few VFNs contained calretinin, VIP, 5HT, CGRP, or NPY. VFNs were often surrounded by dense baskets of axonal varicosities, probably reflecting patterns of connectivity; VAChT+ (cholinergic), SP+ and ENK+ varicosities were most abundant around them. Human VFNs were diverse; showing 27 combinations of immunohistochemical markers, 4 morphological types and a wide range of cell body sizes. However, 69% showed chemical coding, axonal projections, soma-dendritic morphology and connectivity similar to enteric excitatory motor neurons. Conclusion Viscerofugal neurons are present in human colon and show very diverse combinations of features. High proportions express ChAT, consistent with cholinergic synaptic outputs onto postganglionic sympathetic neurons in prevertebral ganglia.
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Affiliation(s)
- Bao Nan Chen
- Human Physiology, Medical Bioscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Adam G. Humenick
- Human Physiology, Medical Bioscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Timothy James Hibberd
- Human Physiology, Medical Bioscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Wai Ping Yew
- Human Physiology, Medical Bioscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - David A. Wattchow
- Department of Surgery, Flinders Medical Centre, Bedford Park, SA, Australia
| | - Phil G. Dinning
- Department of Surgery, Flinders Medical Centre, Bedford Park, SA, Australia
| | - Marcello Costa
- Human Physiology, Medical Bioscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Nick J. Spencer
- Human Physiology, Medical Bioscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Simon J. H. Brookes
- Human Physiology, Medical Bioscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
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Jin S, Chen P, Yang J, Li D, Liu X, Zhang Y, Xia Q, Li Y, Chen G, Li Y, Tong Y, Yu W, Fan X, Lin H. Phocaeicola vulgatus alleviates diet-induced metabolic dysfunction-associated steatotic liver disease progression by downregulating histone acetylation level via 3-HPAA. Gut Microbes 2024; 16:2309683. [PMID: 38312099 PMCID: PMC10854360 DOI: 10.1080/19490976.2024.2309683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 01/19/2024] [Indexed: 02/06/2024] Open
Abstract
Diet-induced metabolic dysfunction-associated steatotic liver disease (MASLD) is a prevalent metabolic disorder with limited effective interventions available. A novel approach to address this issue is through gut microbiota-based therapy. In our study, we utilized multi-omics analysis to identify Phocaeicola vulgatus (P. vulgatus) as a potential probiotic for the treatment of MASLD. Our findings from murine models clearly illustrate that the supplementation of P. vulgatus mitigates the development of MASLD. This beneficial effect is partly attributed to the metabolite 3-Hydroxyphenylacetic acid (3-HPAA) produced by P. vulgatus, which reduces the acetylation levels of H3K27 and downregulates the transcription of Squalene Epoxidase (SQLE), a rate-limiting enzyme in steroid biosynthesis that promotes lipid accumulation in liver cells. This study underscores the significant role of P. vulgatus in the development of MASLD and the critical importance of its metabolite 3-HPAA in regulating lipid homeostasis. These findings offer a promising avenue for early intervention therapy in the context of MASLD.
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Affiliation(s)
- Shengxi Jin
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Peng Chen
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jing Yang
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Biomedical Research Center, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Duguang Li
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaolong Liu
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yiyin Zhang
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qiming Xia
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yiling Li
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Guoqiao Chen
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yixuan Li
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yifan Tong
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Weihua Yu
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaoxiao Fan
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hui Lin
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, China
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6
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Gomez-Frittelli J, Hamnett R, Kaltschmidt JA. Comparison of wholemount dissection methods for neuronal subtype marker expression in the mouse myenteric plexus. Neurogastroenterol Motil 2024; 36:e14693. [PMID: 37882149 PMCID: PMC10842488 DOI: 10.1111/nmo.14693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 09/05/2023] [Accepted: 10/10/2023] [Indexed: 10/27/2023]
Abstract
BACKGROUND Accurately reporting the identity and representation of enteric nervous system (ENS) neuronal subtypes along the length of the gastrointestinal (GI) tract is critical to advancing our understanding of ENS control of GI function. Reports of varying proportions of subtype marker expression have employed different dissection techniques to achieve wholemount muscularis preparations of myenteric plexus. In this study, we asked whether differences in GI dissection methods could introduce variability into the quantification of marker expression. METHODS We compared three commonly used methods of ENS wholemount dissection: two flat-sheet preparations that differed in the order of microdissection and fixation and a third rod-mounted peeling technique. We also tested a reversed orientation variation of flat-sheet peeling, two step-by-step variations of the rod peeling technique, and whole-gut fixation as a tube. We assessed marker expression using immunohistochemistry, genetic reporter lines, confocal microscopy, and automated image analysis. KEY RESULTS AND CONCLUSIONS We found no significant differences between the two flat-sheet preparation methods in the expression of calretinin or neuronal nitric oxide synthase (nNOS) as a proportion of total neurons in ileum myenteric plexus. However, the rod-mounted peeling method resulted in decreased proportion of neurons labeled for both calretinin and nNOS. This method also resulted in decreased transgenic reporter fluorescent protein (tdTomato) for substance P in distal colon and choline acetyltransferase (ChAT) in both ileum and distal colon. These results suggest that labeling among some markers, both native protein and transgenic fluorescent reporters, is decreased by the rod-mounted mechanical method of peeling. The step-by-step variations of this method point to mechanical manipulation of the tissue as the likely cause of decreased labeling. Our study thereby demonstrates a critical variability in wholemount muscularis dissection methods.
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Affiliation(s)
- Julieta Gomez-Frittelli
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305 USA
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA, 94305 USA
| | - Ryan Hamnett
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA, 94305 USA
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305 USA
| | - Julia A. Kaltschmidt
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA, 94305 USA
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305 USA
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Kulkarni S, Saha M, Slosberg J, Singh A, Nagaraj S, Becker L, Zhang C, Bukowski A, Wang Z, Liu G, Leser JM, Kumar M, Bakhshi S, Anderson MJ, Lewandoski M, Vincent E, Goff LA, Pasricha PJ. Age-associated changes in lineage composition of the enteric nervous system regulate gut health and disease. eLife 2023; 12:RP88051. [PMID: 38108810 PMCID: PMC10727506 DOI: 10.7554/elife.88051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023] Open
Abstract
The enteric nervous system (ENS), a collection of neural cells contained in the wall of the gut, is of fundamental importance to gastrointestinal and systemic health. According to the prevailing paradigm, the ENS arises from progenitor cells migrating from the neural crest and remains largely unchanged thereafter. Here, we show that the lineage composition of maturing ENS changes with time, with a decline in the canonical lineage of neural-crest derived neurons and their replacement by a newly identified lineage of mesoderm-derived neurons. Single cell transcriptomics and immunochemical approaches establish a distinct expression profile of mesoderm-derived neurons. The dynamic balance between the proportions of neurons from these two different lineages in the post-natal gut is dependent on the availability of their respective trophic signals, GDNF-RET and HGF-MET. With increasing age, the mesoderm-derived neurons become the dominant form of neurons in the ENS, a change associated with significant functional effects on intestinal motility which can be reversed by GDNF supplementation. Transcriptomic analyses of human gut tissues show reduced GDNF-RET signaling in patients with intestinal dysmotility which is associated with reduction in neural crest-derived neuronal markers and concomitant increase in transcriptional patterns specific to mesoderm-derived neurons. Normal intestinal function in the adult gastrointestinal tract therefore appears to require an optimal balance between these two distinct lineages within the ENS.
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Affiliation(s)
- Subhash Kulkarni
- Division of Gastroenterology, Dept of Medicine, Beth Israel Deaconess Medical CenterBostonUnited States
- Division of Medical Sciences, Harvard Medical SchoolBostonUnited States
| | - Monalee Saha
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Jared Slosberg
- Department of Genetic Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Alpana Singh
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Sushma Nagaraj
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Laren Becker
- Division of Gastroenterology, Stanford University – School of MedicineStanfordUnited States
| | - Chengxiu Zhang
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Alicia Bukowski
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Zhuolun Wang
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Guosheng Liu
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Jenna M Leser
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Mithra Kumar
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Shriya Bakhshi
- Center for Neurogastroenterology, Department of Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Matthew J Anderson
- Center for Cancer Research, National Cancer InstituteFrederickUnited States
| | - Mark Lewandoski
- Center for Cancer Research, National Cancer InstituteFrederickUnited States
| | - Elizabeth Vincent
- Department of Genetic Medicine, Johns Hopkins University – School of MedicineBaltimoreUnited States
| | - Loyal A Goff
- Department of Neuroscience, Johns Hopkins University – School of MedicineBaltimoreUnited States
- Kavli Neurodiscovery Institute, Johns Hopkins University – School of MedicineBaltimoreUnited States
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Bai X, De Palma G, Boschetti E, Nishiharo Y, Lu J, Shimbori C, Costanzini A, Saqib Z, Kraimi N, Sidani S, Hapfelmeier S, Macpherson AJ, Verdu EF, De Giorgio R, Collins SM, Bercik P. Vasoactive Intestinal Polypeptide Plays a Key Role in the Microbial-Neuroimmune Control of Intestinal Motility. Cell Mol Gastroenterol Hepatol 2023; 17:383-398. [PMID: 38061549 PMCID: PMC10825443 DOI: 10.1016/j.jcmgh.2023.11.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/24/2023] [Accepted: 11/27/2023] [Indexed: 12/24/2023]
Abstract
BACKGROUND & AIMS Although chronic diarrhea and constipation are common, the treatment is symptomatic because their pathophysiology is poorly understood. Accumulating evidence suggests that the microbiota modulates gut function, but the underlying mechanisms are unknown. We therefore investigated the pathways by which microbiota modulates gastrointestinal motility in different sections of the alimentary tract. METHODS Gastric emptying, intestinal transit, muscle contractility, acetylcholine release, gene expression, and vasoactive intestinal polypeptide (VIP) immunoreactivity were assessed in wild-type and Myd88-/-Trif-/- mice in germ-free, gnotobiotic, and specific pathogen-free conditions. Effects of transient colonization and antimicrobials as well as immune cell blockade were investigated. VIP levels were assessed in human full-thickness biopsies by Western blot. RESULTS Germ-free mice had similar gastric emptying but slower intestinal transit compared with specific pathogen-free mice or mice monocolonized with Lactobacillus rhamnosus or Escherichia coli, the latter having stronger effects. Although muscle contractility was unaffected, its neural control was modulated by microbiota by up-regulating jejunal VIP, which co-localized with and controlled cholinergic nerve function. This process was responsive to changes in the microbial composition and load and mediated through toll-like receptor signaling, with enteric glia cells playing a key role. Jejunal VIP was lower in patients with chronic intestinal pseudo-obstruction compared with control subjects. CONCLUSIONS Microbial control of gastrointestinal motility is both region- and bacteria-specific; it reacts to environmental changes and is mediated by innate immunity-neural system interactions. By regulating cholinergic nerves, small intestinal VIP plays a key role in this process, thus providing a new therapeutic target for patients with motility disorders.
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Affiliation(s)
- Xiaopeng Bai
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada; Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Giada De Palma
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Elisa Boschetti
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Bologna, Italy
| | - Yuichiro Nishiharo
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Jun Lu
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Chiko Shimbori
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Anna Costanzini
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Zarwa Saqib
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Narjis Kraimi
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Sacha Sidani
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | | | - Andrew J Macpherson
- Department of Biomedical Research, University Hospital of Bern, Bern, Switzerland
| | - Elena F Verdu
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Roberto De Giorgio
- Department of Translational Medicine, University of Ferrara, Ferrara, Italy
| | - Stephen M Collins
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Premysl Bercik
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada.
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9
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Feng X, Deng M, Zhang L, Pan Q. Impact of gut microbiota and associated mechanisms on postprandial glucose levels in patients with diabetes. J Transl Int Med 2023; 11:363-371. [PMID: 38130636 PMCID: PMC10732577 DOI: 10.2478/jtim-2023-0116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023] Open
Abstract
Diabetes and its complications are serious medical and global burdens, often manifesting as postprandial hyperglycemia. In recent years, considerable research attention has focused on relationships between the gut microbiota and circulating postprandial glucose (PPG). Different population studies have suggested that PPG is closely related to the gut microbiota which may impact PPG via short-chain fatty acids (SCFAs), bile acids (BAs) and trimethylamine N-oxide (TMAO). Studies now show that gut microbiota models can predict PPG, with individualized nutrition intervention strategies used to regulate gut microbiota and improve glucose metabolism to facilitate the precision treatment of diabetes. However, few studies have been conducted in patients with diabetes. Therefore, little is known about the relationships between the gut microbiota and PPG in this cohort. Thus, more research is required to identify key gut microbiota and associated metabolites and pathways impacting PPG to provide potential therapeutic targets for PPG.
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Affiliation(s)
- Xinyuan Feng
- Department of Endocrinology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Beijing100730 ,China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing100730, China
| | - Mingqun Deng
- Department of Endocrinology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Beijing100730 ,China
| | - Lina Zhang
- Department of Endocrinology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Beijing100730 ,China
| | - Qi Pan
- Department of Endocrinology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Beijing100730 ,China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing100730, China
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10
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Münzberg H, Berthoud HR, Neuhuber WL. Sensory spinal interoceptive pathways and energy balance regulation. Mol Metab 2023; 78:101817. [PMID: 37806487 PMCID: PMC10590858 DOI: 10.1016/j.molmet.2023.101817] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/02/2023] [Accepted: 10/03/2023] [Indexed: 10/10/2023] Open
Abstract
Interoception plays an important role in homeostatic regulation of energy intake and metabolism. Major interoceptive pathways include gut-to-brain and adipose tissue-to brain signaling via vagal sensory nerves and hormones, such as leptin. However, signaling via spinal sensory neurons is rapidly emerging as an additional important signaling pathway. Here we provide an in-depth review of the known anatomy and functions of spinal sensory pathways and discuss potential mechanisms relevant for energy balance homeostasis in health and disease. Because sensory innervation by dorsal root ganglia (DRG) neurons goes far beyond vagally innervated viscera and includes adipose tissue, skeletal muscle, and skin, it is in a position to provide much more complete metabolic information to the brain. Molecular and anatomical identification of function specific DRG neurons will be important steps in designing pharmacological and neuromodulation approaches to affect energy balance regulation in disease states such as obesity, diabetes, and cancer.
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Affiliation(s)
- Heike Münzberg
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA.
| | - Hans-Rudolf Berthoud
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA.
| | - Winfried L Neuhuber
- Institute for Anatomy and Cell Biology, Friedrich-Alexander University, Erlangen, Germany.
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11
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Liu Z, Sun H, Xu S, Wang H, Zhang Z, Wei Y, Kou Y, Wang Y. Dietary ingredient change induces a transient MyD88-dependent mucosal enteric glial cell response and promotes obesity. Nutr Neurosci 2023; 26:1183-1193. [PMID: 36342063 DOI: 10.1080/1028415x.2022.2142129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE Consumption of a modern Western-type high-fat low-fiber diet increases the risk of obesity. However, how a host responds to such a diet, especially during the early period of dietary transition from a previous low-fat and fiber-rich diet, remains poorly explored. METHODS Wild-type C57BL/6 mice were fed a normal chow diet or a high-fat diet. Enteric glial cell (EGC) activation was detected through quantitative real-time PCR (qRT-PCR), immunoblotting and immunohistology analysis. Fluorocitrate or genetic deletion of glial fibrillary acidic protein (GFAP)-positive glial-intrinsic myeloid differentiation factor 88 (Myd88) was used to inhibit EGC activation, and the effect of a high-fat diet on obesity was further investigated. The role of MYD88-dependent sensing of commensal products in adipocyte was observed to analyze the effect of obesity. RESULTS A dietary shift from a normal chow diet to a high-fat diet in mice induced a transient early-phase emergence of a GFAP-positive EGC network in the lamina propria of the ileum, accompanied with an increase in glial-derived neurotrophic factor production. Inhibition of glial cell activity blocked this response. GFAP-positive glial Myd88 knockout mice gained less body weight after high-fat diet (HFD) feeding than littermate controls. In contrast, adipocyte deletion of Myd88 in mice had no effect on weight gain but instead exacerbated glucose intolerance. Furthermore, short-term fluorocitrate intervention during HFD feeding attenuated body weight gain. CONCLUSIONS Our findings indicate that EGCs are early responders to intestinal ecosystem changes and the GFAP-positive glial Myd88 signaling participates in regulating obesity.
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Affiliation(s)
- Zhuanzhuan Liu
- Laboratory of Infection and Immunity, Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Hongxiang Sun
- Laboratory of Infection and Immunity, Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Shihong Xu
- Laboratory of Infection and Immunity, Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Hanying Wang
- Laboratory of Infection and Immunity, Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Zhiwei Zhang
- Laboratory of Infection and Immunity, Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Yanxia Wei
- Laboratory of Infection and Immunity, Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Yanbo Kou
- Laboratory of Infection and Immunity, Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Yugang Wang
- Laboratory of Infection and Immunity, Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, People's Republic of China
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12
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Wan T, Wang Y, He K, Zhu S. Microbial sensing in the intestine. Protein Cell 2023; 14:824-860. [PMID: 37191444 PMCID: PMC10636641 DOI: 10.1093/procel/pwad028] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/04/2023] [Indexed: 05/17/2023] Open
Abstract
The gut microbiota plays a key role in host health and disease, particularly through their interactions with the immune system. Intestinal homeostasis is dependent on the symbiotic relationships between the host and the diverse gut microbiota, which is influenced by the highly co-evolved immune-microbiota interactions. The first step of the interaction between the host and the gut microbiota is the sensing of the gut microbes by the host immune system. In this review, we describe the cells of the host immune system and the proteins that sense the components and metabolites of the gut microbes. We further highlight the essential roles of pattern recognition receptors (PRRs), the G protein-coupled receptors (GPCRs), aryl hydrocarbon receptor (AHR) and the nuclear receptors expressed in the intestinal epithelial cells (IECs) and the intestine-resident immune cells. We also discuss the mechanisms by which the disruption of microbial sensing because of genetic or environmental factors causes human diseases such as the inflammatory bowel disease (IBD).
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Affiliation(s)
- Tingting Wan
- Division of Life Sciences and Medicine, The CAS Key Laboratory of Innate Immunity and Chronic Disease, Institute of Immunology, School of Basic Medical Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Yalong Wang
- Division of Life Sciences and Medicine, The CAS Key Laboratory of Innate Immunity and Chronic Disease, Institute of Immunology, School of Basic Medical Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Kaixin He
- Division of Life Sciences and Medicine, The CAS Key Laboratory of Innate Immunity and Chronic Disease, Institute of Immunology, School of Basic Medical Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Shu Zhu
- Division of Life Sciences and Medicine, The CAS Key Laboratory of Innate Immunity and Chronic Disease, Institute of Immunology, School of Basic Medical Sciences, University of Science and Technology of China, Hefei 230027, China
- Department of Digestive Disease, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei 230001, China
- Institute of Health and Medicine, Hefei Comprehensive National Science Center, Hefei 230601, China
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13
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Fan S, Guo W, Xiao D, Guan M, Liao T, Peng S, Feng A, Wang Z, Yin H, Li M, Chen J, Xiong W. Microbiota-gut-brain axis drives overeating disorders. Cell Metab 2023; 35:2011-2027.e7. [PMID: 37794596 DOI: 10.1016/j.cmet.2023.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 08/10/2023] [Accepted: 09/11/2023] [Indexed: 10/06/2023]
Abstract
Overeating disorders (ODs), usually stemming from dieting history and stress, remain a pervasive issue in contemporary society, with the pathological mechanisms largely unresolved. Here, we show that alterations in intestinal microbiota are responsible for the excessive intake of palatable foods in OD mice and patients with bulimia nervosa (BN). Stress combined with a history of dieting causes significant changes in the microbiota and the intestinal metabolism, which disinhibit the vagus nerve terminals in the gut and thereby lead to a subsequent hyperactivation of the gut-brain axis passing through the vagus, the solitary tract nucleus, and the paraventricular nucleus of the thalamus. The transplantation of a probiotic Faecalibacterium prausnitzii or dietary supplement of key metabolites restores the activity of the gut-to-brain pathway and thereby alleviates the OD symptoms. Thus, our study delineates how the microbiota-gut-brain axis mediates energy balance, unveils the underlying pathogenesis of the OD, and provides potential therapeutic strategies.
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Affiliation(s)
- Sijia Fan
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230001, China
| | - Weiwei Guo
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230001, China
| | - Dan Xiao
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230001, China
| | - Mengyuan Guan
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230001, China
| | - Tiepeng Liao
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230001, China; Anhui Province Key Laboratory of Biomedical Imaging and Intelligent Processing, Institute of Artificial Intelligence, Hefei Comprehensive National Science Center, Hefei 230088, China
| | - Sufang Peng
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Airong Feng
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230001, China
| | - Ziyi Wang
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230001, China
| | - Hao Yin
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230001, China
| | - Min Li
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei 230026, China.
| | - Jue Chen
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China.
| | - Wei Xiong
- Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230001, China; Anhui Province Key Laboratory of Biomedical Imaging and Intelligent Processing, Institute of Artificial Intelligence, Hefei Comprehensive National Science Center, Hefei 230088, China; Anhui Province Key Laboratory of Biomedical Aging Research, Hefei 230026, China.
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14
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Makowska K, Fagundes KRC, Gonkowski S. Influence of bisphenol A and its analog bisphenol S on cocaine- and amphetamine-regulated transcript peptide-positive enteric neurons in the mouse gastrointestinal tract. Front Mol Neurosci 2023; 16:1234841. [PMID: 37675141 PMCID: PMC10477371 DOI: 10.3389/fnmol.2023.1234841] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 08/08/2023] [Indexed: 09/08/2023] Open
Abstract
Introduction Bisphenol A (BPA) is used in large quantities for the production of plastics and is present in various everyday objects. It penetrates living organisms and shows multidirectional adverse influence on many internal organs. For this reason, BPA is often replaced in plastic production by other substances. One of them is bisphenol S (BPS), whose effects on the enteric nervous system (ENS) have not been explained. Methods Therefore, the present study compares the influence of BPA and BPS on the number of enteric neurons immunoreactive to cocaine-and amphetamine-regulated transcript (CART) peptide located in the ENS of the stomach, jejunum and colon with the use of double immunofluorescence method. Results The obtained results have shown that both bisphenols studied induced an increase in the number of CART-positive enteric neurons, and the severity of changes depended on the type of enteric ganglion, the dose of bisphenols and the segment of the digestive tract. The most visible changes were noted in the myenteric ganglia in the colon. Moreover, in the colon, the changes submitted by BPS are more noticeable than those observed after BPA administration. In the stomach and jejunum, bisphenol-induced changes were less visible, and changes caused by BPS were similar or less pronounced than those noted under the impact of BPA, depending on the segment of the gastrointestinal tract and ganglion type studied. Discussion The results show that BPS affects the enteric neurons containing CART in a similar way to BPA, and the BPS impact is even stronger in the colon. Therefore, BPS is not neutral for the gastrointestinal tract and ENS.
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Affiliation(s)
- Krystyna Makowska
- Department of Clinical Diagnostics, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Kainã R. C. Fagundes
- Laboratório de Morfofisiologia Animal, Instituto de Biociências, Universidade Estadual Paulista, São Paulo, Brazil
| | - Sławomir Gonkowski
- Department of Clinical Physiology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
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15
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Sumiyoshi A, Fujii H, Okuma Y. Targeting microbiome, drug metabolism, and drug delivery in oncology. Adv Drug Deliv Rev 2023; 199:114902. [PMID: 37263544 DOI: 10.1016/j.addr.2023.114902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 05/13/2023] [Accepted: 05/24/2023] [Indexed: 06/03/2023]
Abstract
Recent emerging scientific evidence shows a relationship between gut microbiota (GM) and immunomodulation. In the recently published "Hallmarks of Cancer", the microbiome has been reported to play a crucial role in cancer research, and perspectives for its clinical implementation to improve the effectiveness of pharmacotherapy were explored. Several studies have shown that GM can affect the outcomes of pharmacotherapy in cancer, suggesting that GM may affect anti-tumor immunity. Thus, studies on GM that analyze big data using computer-based analytical methods are required. In order to successfully deliver GM to an environment conducive to the proliferation of immune cells both within and outside the tumor microenvironment (TME), it is crucial to address a variety of challenges associated with distinct delivery methods, specifically those pertaining to oral, endoscopic, and intravenous delivery. Clinical trials are in progress to evaluate the effects of targeting GM and whether it can enhance immunity or act on the TME, thereby to improve the clinical outcomes for cancer patients.
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Affiliation(s)
- Ai Sumiyoshi
- Department of Pharmacy, National Cancer Center Hospital 5-1-1 Tsukiji Chuo, Tokyo 104-0045, Japan
| | - Hiroyuki Fujii
- Department of Thoracic Oncology, National Cancer Center Hospital 5-1-1 Tsukiji Chuo, Tokyo 104-0045, Japan; Department of Pulmonary Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo, Kyoto 602-8566, Japan
| | - Yusuke Okuma
- Department of Thoracic Oncology, National Cancer Center Hospital 5-1-1 Tsukiji Chuo, Tokyo 104-0045, Japan.
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16
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Bosch AJT, Rohm TV, AlAsfoor S, Low AJY, Baumann Z, Parayil N, Noreen F, Roux J, Meier DT, Cavelti-Weder C. Diesel Exhaust Particle (DEP)-induced glucose intolerance is driven by an intestinal innate immune response and NLRP3 activation in mice. Part Fibre Toxicol 2023; 20:25. [PMID: 37400850 DOI: 10.1186/s12989-023-00536-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 06/20/2023] [Indexed: 07/05/2023] Open
Abstract
BACKGROUND We previously found that air pollution particles reaching the gastrointestinal tract elicit gut inflammation as shown by up-regulated gene expression of pro-inflammatory cytokines and monocyte/macrophage markers. This inflammatory response was associated with beta-cell dysfunction and glucose intolerance. So far, it remains unclear whether gut inflammatory changes upon oral air pollution exposure are causally linked to the development of diabetes. Hence, our aim was to assess the role of immune cells in mediating glucose intolerance instigated by orally administered air pollutants. METHODS To assess immune-mediated mechanisms underlying air pollution-induced glucose intolerance, we administered diesel exhaust particles (DEP; NIST 1650b, 12 µg five days/week) or phosphate-buffered saline (PBS) via gavage for up to 10 months to wild-type mice and mice with genetic or pharmacological depletion of innate or adaptive immune cells. We performed unbiased RNA-sequencing of intestinal macrophages to elucidate signaling pathways that could be pharmacologically targeted and applied an in vitro approach to confirm these pathways. RESULTS Oral exposure to air pollution particles induced an interferon and inflammatory signature in colon macrophages together with a decrease of CCR2- anti-inflammatory/resident macrophages. Depletion of macrophages, NLRP3 or IL-1β protected mice from air pollution-induced glucose intolerance. On the contrary, Rag2-/- mice lacking adaptive immune cells developed pronounced gut inflammation and glucose intolerance upon oral DEP exposure. CONCLUSION In mice, oral exposure to air pollution particles triggers an immune-mediated response in intestinal macrophages that contributes to the development of a diabetes-like phenotype. These findings point towards new pharmacologic targets in diabetes instigated by air pollution particles.
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Affiliation(s)
- Angela J T Bosch
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland
| | - Theresa V Rohm
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland
| | - Shefaa AlAsfoor
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland
| | - Andy J Y Low
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland
| | - Zora Baumann
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland
| | - Neena Parayil
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland
| | - Faiza Noreen
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland
- Swiss Institute of Bioinformatics, Basel, 4031, Switzerland
| | - Julien Roux
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland
- Swiss Institute of Bioinformatics, Basel, 4031, Switzerland
| | - Daniel T Meier
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland
| | - Claudia Cavelti-Weder
- Department of Biomedicine, University of Basel, Basel, 4031, Switzerland.
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, 4031, Switzerland.
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland.
- University Hospital Zurich, Rämistrasse 100, Zürich, 8009, Switzerland.
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17
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Dharshika C, Gonzales J, Chow A, Morales-Soto W, Gulbransen BD. Stimulator of interferon genes (STING) expression in the enteric nervous system and contributions of glial STING in disease. Neurogastroenterol Motil 2023; 35:e14553. [PMID: 37309618 DOI: 10.1111/nmo.14553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 01/26/2023] [Accepted: 02/07/2023] [Indexed: 06/14/2023]
Abstract
BACKGROUND Appropriate host-microbe interactions are essential for enteric glial development and subsequent gastrointestinal function, but the potential mechanisms of microbe-glial communication are unclear. Here, we tested the hypothesis that enteric glia express the pattern recognition receptor stimulator of interferon genes (STING) and communicate with the microbiome through this pathway to modulate gastrointestinal inflammation. METHODS In situ transcriptional labeling and immunohistochemistry were used to examine STING and IFNβ expression in enteric neurons and glia. Glial-STING KO mice (Sox10CreERT2+/- ;STINGfl/fl ) and IFNβ ELISA were used to characterize the role of enteric glia in canonical STING activation. The role of glial STING in gastrointestinal inflammation was assessed in the 3% DSS colitis model. RESULTS Enteric glia and neurons express STING, but only enteric neurons express IFNβ. While both the myenteric and submucosal plexuses produce IFNβ with STING activation, enteric glial STING plays a minor role in its production and seems more involved in autophagy processes. Furthermore, deleting enteric glial STING does not affect weight loss, colitis severity, or neuronal cell proportions in the DSS colitis model. CONCLUSION Taken together, our data support canonical roles for STING and IFNβ signaling in the enteric nervous system through enteric neurons but that enteric glia do not use these same mechanisms. We propose that enteric glial STING may utilize alternative signaling mechanisms and/or is only active in particular disease conditions. Regardless, this study provides the first glimpse of STING signaling in the enteric nervous system and highlights a potential avenue of neuroglial-microbial communication.
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Affiliation(s)
- Christine Dharshika
- Department of Physiology, Neuroscience Program, Michigan State University, East Lansing, Michigan, USA
- College of Human Medicine, Michigan State University, East Lansing, Michigan, USA
| | - Jacques Gonzales
- Department of Physiology, Neuroscience Program, Michigan State University, East Lansing, Michigan, USA
| | - Aaron Chow
- Department of Physiology, Neuroscience Program, Michigan State University, East Lansing, Michigan, USA
| | - Wilmarie Morales-Soto
- Department of Physiology, Neuroscience Program, Michigan State University, East Lansing, Michigan, USA
| | - Brian D Gulbransen
- Department of Physiology, Neuroscience Program, Michigan State University, East Lansing, Michigan, USA
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18
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Chen BN, Humenick A, Yew WP, Peterson RA, Wiklendt L, Dinning PG, Spencer NJ, Wattchow DA, Costa M, Brookes SJH. Types of Neurons in the Human Colonic Myenteric Plexus Identified by Multilayer Immunohistochemical Coding. Cell Mol Gastroenterol Hepatol 2023; 16:573-605. [PMID: 37355216 PMCID: PMC10469081 DOI: 10.1016/j.jcmgh.2023.06.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/26/2023]
Abstract
BACKGROUND AND AIMS Gut functions including motility, secretion, and blood flow are largely controlled by the enteric nervous system. Characterizing the different classes of enteric neurons in the human gut is an important step to understand how its circuitry is organized and how it is affected by disease. METHODS Using multiplexed immunohistochemistry, 12 discriminating antisera were applied to distinguish different classes of myenteric neurons in the human colon (2596 neurons, 12 patients) according to their chemical coding. All antisera were applied to every neuron, in multiple layers, separated by elutions. RESULTS A total of 164 combinations of immunohistochemical markers were present among the 2596 neurons, which could be divided into 20 classes, with statistical validation. Putative functions were ascribed for 4 classes of putative excitatory motor neurons (EMN1-4), 4 inhibitory motor neurons (IMN1-4), 3 ascending interneurons (AIN1-3), 6 descending interneurons (DIN1-6), 2 classes of multiaxonal sensory neurons (SN1-2), and a small, miscellaneous group (1.8% of total). Soma-dendritic morphology was analyzed, revealing 5 common shapes distributed differentially between the 20 classes. Distinctive baskets of axonal varicosities surrounded 45% of myenteric nerve cell bodies and were associated with close appositions, suggesting possible connectivity. Baskets of cholinergic terminals and several other types of baskets selectively targeted ascending interneurons and excitatory motor neurons but were significantly sparser around inhibitory motor neurons. CONCLUSIONS Using a simple immunohistochemical method, human myenteric neurons were shown to comprise multiple classes based on chemical coding and morphology and dense clusters of axonal varicosities were selectively associated with some classes.
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Affiliation(s)
- Bao Nan Chen
- Human Physiology, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Adam Humenick
- Human Physiology, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Wai Ping Yew
- Human Physiology, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Rochelle A Peterson
- Human Physiology, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Lukasz Wiklendt
- Human Physiology, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Phil G Dinning
- Human Physiology, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia; Colorectal Surgical Unit, Division of Surgery, Flinders Medical Centre, Bedford Park, South Australia, Australia
| | - Nick J Spencer
- Human Physiology, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - David A Wattchow
- Colorectal Surgical Unit, Division of Surgery, Flinders Medical Centre, Bedford Park, South Australia, Australia
| | - Marcello Costa
- Human Physiology, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Simon J H Brookes
- Human Physiology, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia.
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19
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Scavuzzo MA, Letai KC, Maeno-Hikichi Y, Wulftange WJ, Shah IK, Rameshbabu JS, Tomar A, Shick HE, Shah AK, Xiong Y, Cohn EF, Allan KC, Tesar PJ. Enteric glial hub cells coordinate intestinal motility. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.07.544052. [PMID: 37333182 PMCID: PMC10274798 DOI: 10.1101/2023.06.07.544052] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Enteric glia are the predominant cell type in the enteric nervous system yet their identities and roles in gastrointestinal function are not well classified. Using our optimized single nucleus RNA-sequencing method, we identified distinct molecular classes of enteric glia and defined their morphological and spatial diversity. Our findings revealed a functionally specialized biosensor subtype of enteric glia that we call "hub cells." Deletion of the mechanosensory ion channel PIEZO2 from adult enteric glial hub cells, but not other subtypes of enteric glia, led to defects in intestinal motility and gastric emptying in mice. These results provide insight into the multifaceted functions of different enteric glial cell subtypes in gut health and emphasize that therapies targeting enteric glia could advance the treatment of gastrointestinal diseases.
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Affiliation(s)
- Marissa A. Scavuzzo
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Katherine C. Letai
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Yuka Maeno-Hikichi
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - William J. Wulftange
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Isha K. Shah
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Jeyashri S. Rameshbabu
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Alka Tomar
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - H. Elizabeth Shick
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Aakash K. Shah
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Ying Xiong
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Erin F. Cohn
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Kevin C. Allan
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
| | - Paul J. Tesar
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
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20
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Sharkey KA, Mawe GM. The enteric nervous system. Physiol Rev 2023; 103:1487-1564. [PMID: 36521049 PMCID: PMC9970663 DOI: 10.1152/physrev.00018.2022] [Citation(s) in RCA: 51] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 12/12/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
Of all the organ systems in the body, the gastrointestinal tract is the most complicated in terms of the numbers of structures involved, each with different functions, and the numbers and types of signaling molecules utilized. The digestion of food and absorption of nutrients, electrolytes, and water occurs in a hostile luminal environment that contains a large and diverse microbiota. At the core of regulatory control of the digestive and defensive functions of the gastrointestinal tract is the enteric nervous system (ENS), a complex system of neurons and glia in the gut wall. In this review, we discuss 1) the intrinsic neural control of gut functions involved in digestion and 2) how the ENS interacts with the immune system, gut microbiota, and epithelium to maintain mucosal defense and barrier function. We highlight developments that have revolutionized our understanding of the physiology and pathophysiology of enteric neural control. These include a new understanding of the molecular architecture of the ENS, the organization and function of enteric motor circuits, and the roles of enteric glia. We explore the transduction of luminal stimuli by enteroendocrine cells, the regulation of intestinal barrier function by enteric neurons and glia, local immune control by the ENS, and the role of the gut microbiota in regulating the structure and function of the ENS. Multifunctional enteric neurons work together with enteric glial cells, macrophages, interstitial cells, and enteroendocrine cells integrating an array of signals to initiate outputs that are precisely regulated in space and time to control digestion and intestinal homeostasis.
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Affiliation(s)
- Keith A Sharkey
- Hotchkiss Brain Institute and Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Gary M Mawe
- Department of Neurological Sciences, Larner College of Medicine, University of Vermont, Burlington, Vermont
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21
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Lu S, Li Y, Qian Z, Zhao T, Feng Z, Weng X, Yu L. Role of the inflammasome in insulin resistance and type 2 diabetes mellitus. Front Immunol 2023; 14:1052756. [PMID: 36993972 PMCID: PMC10040598 DOI: 10.3389/fimmu.2023.1052756] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 02/27/2023] [Indexed: 03/18/2023] Open
Abstract
The inflammasome is a protein complex composed of a variety of proteins in cells and which participates in the innate immune response of the body. It can be activated by upstream signal regulation and plays an important role in pyroptosis, apoptosis, inflammation, tumor regulation, etc. In recent years, the number of metabolic syndrome patients with insulin resistance (IR) has increased year by year, and the inflammasome is closely related to the occurrence and development of metabolic diseases. The inflammasome can directly or indirectly affect conduction of the insulin signaling pathway, involvement the occurrence of IR and type 2 diabetes mellitus (T2DM). Moreover, various therapeutic agents also work through the inflammasome to treat with diabetes. This review focuses on the role of inflammasome on IR and T2DM, pointing out the association and utility value. Briefly, we have discussed the main inflammasomes, including NLRP1, NLRP3, NLRC4, NLRP6 and AIM2, as well as their structure, activation and regulation in IR were described in detail. Finally, we discussed the current therapeutic options-associated with inflammasome for the treatment of T2DM. Specially, the NLRP3-related therapeutic agents and options are widely developed. In summary, this article reviews the role of and research progress on the inflammasome in IR and T2DM.
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Affiliation(s)
- Shen Lu
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Yanrong Li
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
- Institute of Precision Medicine, Xinxiang Medical University, Xinxiang, Henan, China
| | - Zhaojun Qian
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Tiesuo Zhao
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
- Institute of Precision Medicine, Xinxiang Medical University, Xinxiang, Henan, China
- Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Zhiwei Feng
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
- Institute of Precision Medicine, Xinxiang Medical University, Xinxiang, Henan, China
- Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Xiaogang Weng
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
- *Correspondence: Lili Yu, ; Xiaogang Weng,
| | - Lili Yu
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
- Institute of Precision Medicine, Xinxiang Medical University, Xinxiang, Henan, China
- Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang, Henan, China
- *Correspondence: Lili Yu, ; Xiaogang Weng,
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22
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Chu L, Su D, Wang H, Aili D, Yimingniyazi B, Jiang Q, Dai J. Association between Antibiotic Exposure and Type 2 Diabetes Mellitus in Middle-Aged and Older Adults. Nutrients 2023; 15:nu15051290. [PMID: 36904289 PMCID: PMC10005743 DOI: 10.3390/nu15051290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 03/08/2023] Open
Abstract
BACKGROUND Although previous studies have shown an association between clinically used antibiotics and type 2 diabetes, the relationship between antibiotic exposure from food and drinking water and type 2 diabetes in middle-aged and older adults is unclear. OBJECTIVE This study was aimed at exploring the relationship between antibiotic exposures from different sources and type 2 diabetes in middle-aged and older people, through urinary antibiotic biomonitoring. METHODS A total of 525 adults who were 45-75 years of age were recruited from Xinjiang in 2019. The total urinary concentrations of 18 antibiotics in five classes (tetracyclines, fluoroquinolones, macrolides, sulfonamides and chloramphenicol) commonly used in daily life were measured via isotope dilution ultraperformance liquid chromatography coupled with high-resolution quadrupole time-of-flight mass spectrometry. The antibiotics included four human antibiotics, four veterinary antibiotics and ten preferred veterinary antibiotics. The hazard quotient (HQ) of each antibiotic and the hazard index (HI) based on the mode of antibiotic use and effect endpoint classification were also calculated. Type 2 diabetes was defined on the basis of international levels. RESULTS The overall detection rate of the 18 antibiotics in middle-aged and older adults was 51.0%. The concentration, daily exposure dose, HQ, and HI were relatively high in participants with type 2 diabetes. After model adjustment for covariates, participants with HI > 1 for microbial effects (OR = 3.442, 95%CI: 1.423-8.327), HI > 1 for preferred veterinary antibiotic use (OR = 3.348, 95%CI: 1.386-8.083), HQ > 1 for norfloxacin (OR = 10.511, 96%CI: 1.571-70.344) and HQ > 1 for ciprofloxacin (OR = 6.565, 95%CI: 1.676-25.715) had a higher risk of developing type 2 diabetes mellitus. CONCLUSIONS Certain antibiotic exposures, mainly those from sources associated with food and drinking water, generate health risks and are associated with type 2 diabetes in middle-aged and older adults. Because of this study's cross-sectional design, additional prospective studies and experimental studies are needed to validate these findings.
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Affiliation(s)
- Lei Chu
- School of Public Health, Xinjiang Medical University, 567 Shangde North Road, Urumqi 830000, China
| | - Deqi Su
- School of Public Health, Xinjiang Medical University, 567 Shangde North Road, Urumqi 830000, China
| | - Hexing Wang
- Key Laboratory of Public Health Safety of Ministry of Education, School of Public Health, Fudan University, Shanghai 200032, China
| | - Dilihumaer Aili
- School of Public Health, Xinjiang Medical University, 567 Shangde North Road, Urumqi 830000, China
| | - Bahegu Yimingniyazi
- School of Public Health, Xinjiang Medical University, 567 Shangde North Road, Urumqi 830000, China
| | - Qingwu Jiang
- Key Laboratory of Public Health Safety of Ministry of Education, School of Public Health, Fudan University, Shanghai 200032, China
| | - Jianghong Dai
- School of Public Health, Xinjiang Medical University, 567 Shangde North Road, Urumqi 830000, China
- Correspondence:
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23
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Gomez-Frittelli J, Hamnett R, Kaltschmidt JA. Comparison of wholemount dissection methods for neuronal subtype marker expression in the mouse myenteric plexus. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.17.524014. [PMID: 36711933 PMCID: PMC9882214 DOI: 10.1101/2023.01.17.524014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Background Accurately reporting the identity and representation of enteric nervous system (ENS) neuronal subtypes along the length of the gastrointestinal (GI) tract is critical to advancing our understanding of ENS control of GI tract function. Reports of varying proportions of subtype marker expression have employed different dissection techniques to achieve wholemount muscularis preparations of myenteric plexus. In this study we asked whether differences in GI dissection methods could introduce variability into the quantification of marker expression. Methods We compared three commonly used methods of ENS wholemount dissection: two flat-sheet preparations that differed in the order of microdissection and fixation as well as a rod-mounted peeling technique. We assessed marker expression using immunohistochemistry, genetic reporter lines, confocal microscopy, and automated image analysis. Key Results and Conclusions We found no significant differences between the two flat-sheet preparation methods in the expression of calretinin, neuronal nitric oxide synthase (nNOS), or somatostatin (SST) in ileum myenteric plexus. However, the rod-mounted peeling method resulted in decreased marker labeling for both calretinin and nNOS. This method also resulted in decreased transgenic reporter fluorescent protein (tdTomato) for substance P in ileum and choline acetyltransferase (ChAT) in both ileum and distal colon. These results suggest that labeling among some markers, both native protein and transgenic fluorescent reporters, is decreased by the rod-mounted mechanical method of peeling, demonstrating a critical variability in wholemount muscularis dissection methods.
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Affiliation(s)
- Julieta Gomez-Frittelli
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305 USA
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA 94305 USA
| | - Ryan Hamnett
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA 94305 USA
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305 USA
| | - Julia A. Kaltschmidt
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA 94305 USA
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305 USA
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24
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Tian D, Xu W, Pan W, Zheng B, Yang W, Jia W, Liu Y, Garstka MA, Gao Y, Yu H. Fecal microbiota transplantation enhances cell therapy in a rat model of hypoganglionosis by SCFA-induced MEK1/2 signaling pathway. EMBO J 2023; 42:e111139. [PMID: 36382711 PMCID: PMC9811615 DOI: 10.15252/embj.2022111139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 10/19/2022] [Accepted: 10/27/2022] [Indexed: 11/17/2022] Open
Abstract
Hirschsprung disease (HSCR), one of several neurocristopathies in children, is characterized by nerve loss in the large intestine and is mainly treated by surgery, which causes severe complications. Enteric neural crest-derived cell (ENCC) transplantation is a potential therapeutic strategy; however, so far with poor efficacy. Here, we assessed whether and how fecal microbiota transplantation (FMT) could improve ENCC transplantation in a rat model of hypoganglionosis; a condition similar to HSCR, with less intestinal innervation. We found that the hypoganglionosis intestinal microenvironment negatively influenced the ENCC functional phenotype in vitro and in vivo. Combining 16S rDNA sequencing and targeted mass spectrometry revealed microbial dysbiosis and reduced short-chain fatty acid (SCFA) production in the hypoganglionic gut. FMT increased the abundance of Bacteroides and Clostridium, SCFA production, and improved outcomes following ENCC transplantation. SCFAs alone stimulated ENCC proliferation, migration, and supported ENCC transplantation. Transcriptome-wide mRNA sequencing identified MAPK signaling as the top differentially regulated pathway in response to SCFA exposure, and inhibition of MEK1/2 signaling abrogated the SCFA-mediated effects on ENCC. This study demonstrates that FMT improves cell therapy for hypoganglionosis via short-chain fatty acid metabolism-induced MEK1/2 signaling.
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Affiliation(s)
- Donghao Tian
- Department of Pediatric Surgery, The Second Affiliated HospitalXi'an Jiaotong UniversityXi'anChina
- Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Chinese Ministry of EducationXi'an Jiaotong UniversityXi'anChina
| | - Wenyao Xu
- Department of Pediatric Surgery, The Second Affiliated HospitalXi'an Jiaotong UniversityXi'anChina
- Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Chinese Ministry of EducationXi'an Jiaotong UniversityXi'anChina
| | - Weikang Pan
- Department of Pediatric Surgery, The Second Affiliated HospitalXi'an Jiaotong UniversityXi'anChina
| | - Baijun Zheng
- Department of Pediatric Surgery, The Second Affiliated HospitalXi'an Jiaotong UniversityXi'anChina
| | - Weili Yang
- Department of Pediatric Surgery, The Second Affiliated HospitalXi'an Jiaotong UniversityXi'anChina
| | - Wanying Jia
- Department of Pediatric Surgery, The Second Affiliated HospitalXi'an Jiaotong UniversityXi'anChina
| | - Yong Liu
- Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Chinese Ministry of EducationXi'an Jiaotong UniversityXi'anChina
| | - Malgorzata A Garstka
- Core Research Laboratory, The Second Affiliated HospitalXi'an Jiaotong UniversityXi'anChina
| | - Ya Gao
- Department of Pediatric Surgery, The Second Affiliated HospitalXi'an Jiaotong UniversityXi'anChina
| | - Hui Yu
- Department of Pediatric Surgery, The Second Affiliated HospitalXi'an Jiaotong UniversityXi'anChina
- Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Chinese Ministry of EducationXi'an Jiaotong UniversityXi'anChina
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25
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Zhou YD, Liang FX, Tian HR, Luo D, Wang YY, Yang SR. Mechanisms of gut microbiota-immune-host interaction on glucose regulation in type 2 diabetes. Front Microbiol 2023; 14:1121695. [PMID: 36891383 PMCID: PMC9986296 DOI: 10.3389/fmicb.2023.1121695] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 01/31/2023] [Indexed: 02/22/2023] Open
Abstract
Intestinal absorption of food is one of the sources of glucose. Insulin resistance and impaired glucose tolerance caused by lifestyle and diet are the precursors of type 2 diabetes. Patients with type 2 diabetes have trouble controlling their blood sugar levels. For long-term health, strict glycemic management is necessary. Although it is thought to be well correlated with metabolic diseases like obesity, insulin resistance, and diabetes, its molecular mechanism is still not completely understood. Disturbed microbiota triggers the gut immune response to reshape the gut homeostasis. This interaction not only maintains the dynamic changes of intestinal flora, but also preserves the integrity of the intestinal barrier. Meanwhile, the microbiota establishes a systemic multiorgan dialog on the gut-brain and gut-liver axes, intestinal absorption of a high-fat diet affects the host's feeding preference and systemic metabolism. Intervention in the gut microbiota can combat the decreased glucose tolerance and insulin sensitivity linked to metabolic diseases both centrally and peripherally. Moreover, the pharmacokinetics of oral hypoglycemic medications are also influenced by gut microbiota. The accumulation of drugs in the gut microbiota not only affects the drug efficacy, but also changes the composition and function of them, thus may help to explain individual therapeutic variances in pharmacological efficacy. Regulating gut microbiota through healthy dietary patterns or supplementing pro/prebiotics can provide guidance for lifestyle interventions in people with poor glycemic control. Traditional Chinese medicine can also be used as complementary medicine to effectively regulate intestinal homeostasis. Intestinal microbiota is becoming a new target against metabolic diseases, so more evidence is needed to elucidate the intricate microbiota-immune-host relationship, and explore the therapeutic potential of targeting intestinal microbiota.
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Affiliation(s)
- Yu-Dian Zhou
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, Hebei, China
| | - Feng-Xia Liang
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, Hebei, China
| | - Hao-Ran Tian
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, Hebei, China
| | - Dan Luo
- Department of Respiratory Wuhan No.1 Hospital, Wuhan, Hebei, China
| | - Ya-Yuan Wang
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, Hebei, China
| | - Shu-Rui Yang
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, Hebei, China
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26
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Jimenez MT, Clark ML, Wright JM, Michieletto MF, Liu S, Erickson I, Dohnalova L, Uhr GT, Tello-Cajiao J, Joannas L, Williams A, Gagliani N, Bewtra M, Tomov VT, Thaiss CA, Henao-Mejia J. The miR-181 family regulates colonic inflammation through its activity in the intestinal epithelium. J Exp Med 2022; 219:213450. [PMID: 36074090 PMCID: PMC9462864 DOI: 10.1084/jem.20212278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 06/02/2022] [Accepted: 08/11/2022] [Indexed: 11/04/2022] Open
Abstract
The intestinal epithelium is a key physical interface that integrates dietary and microbial signals to regulate nutrient uptake and mucosal immune cell function. The transcriptional programs that regulate intestinal epithelial cell (IEC) quiescence, proliferation, and differentiation have been well characterized. However, how gene expression networks critical for IECs are posttranscriptionally regulated during homeostasis or inflammatory disease remains poorly understood. Herein, we show that a conserved family of microRNAs, miR-181, is significantly downregulated in IECs from patients with inflammatory bowel disease and mice with chemical-induced colitis. Strikingly, we showed that miR-181 expression within IECs, but not the hematopoietic system, is required for protection against severe colonic inflammation in response to epithelial injury in mice. Mechanistically, we showed that miR-181 expression increases the proliferative capacity of IECs, likely through the regulation of Wnt signaling, independently of the gut microbiota composition. As epithelial reconstitution is crucial to restore intestinal homeostasis after injury, the miR-181 family represents a potential therapeutic target against severe intestinal inflammation.
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Affiliation(s)
- Monica T Jimenez
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Megan L Clark
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Jasmine M Wright
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Michaël F Michieletto
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Suying Liu
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Isabel Erickson
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Lenka Dohnalova
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Giulia T Uhr
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - John Tello-Cajiao
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Leonel Joannas
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Adam Williams
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Nicola Gagliani
- Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Immunology and Allergy Unit, Department of Medicine, Solna, Karolinska Institute and University Hospital, Stockholm, Sweden
| | - Meenakshi Bewtra
- Department of Medicine, Division of Gastroenterology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA.,Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, PA.,Department of Biostatistics and Epidemiology, University of Pennsylvania, Philadelphia, PA
| | - Vesselin T Tomov
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Department of Medicine, Division of Gastroenterology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Christoph A Thaiss
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Jorge Henao-Mejia
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.,Division of Protective Immunity, Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA
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27
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Functional Intraregional and Interregional Heterogeneity between Myenteric Glial Cells of the Colon and Duodenum in Mice. J Neurosci 2022; 42:8694-8708. [PMID: 36319118 PMCID: PMC9671584 DOI: 10.1523/jneurosci.2379-20.2022] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 09/26/2022] [Accepted: 09/27/2022] [Indexed: 02/24/2023] Open
Abstract
Enteric glia are a unique population of peripheral neuroglia that regulate homeostasis in the enteric nervous system (ENS) and intestinal functions. Despite existing in functionally diverse regions of the gastrointestinal tract, enteric glia have been approached scientifically as a homogeneous group of cells. This assumption is at odds with the functional specializations of gastrointestinal organs and recent data suggesting glial heterogeneity in the brain and ENS. Here, we used calcium imaging in transgenic mice of both sexes expressing genetically encoded calcium sensors in enteric glia and conducted contractility studies to investigate functional diversity among myenteric glia in two functionally distinct intestinal organs: the duodenum and the colon. Our data show that myenteric glia exhibit regionally distinct responses to neuromodulators that require intercellular communication with neurons to differing extents in the duodenum and colon. Glia regulate intestinal contractility in a region-specific and pathway-specific manner, which suggests regionally diverse engagement of enteric glia in local motor patterns through discrete signaling pathways. Further, functional response profiles delineate four unique subpopulations among myenteric glia that are differentially distributed between the colon and duodenum. Our findings support the conclusion that myenteric glia exhibit both intraregional and interregional heterogeneity that contributes to region-specific mechanisms that regulate digestive functions. Glial heterogeneity adds an unexpected layer of complexity in peripheral neurocircuits, and understanding the specific functions of specialized glial subtypes will provide new insight into ENS physiology and pathophysiology.SIGNIFICANCE STATEMENT Enteric glia modulate gastrointestinal functions through intercellular communication with enteric neurons. Whether heterogeneity exists among neuron-glia interactions in the digestive tract is not understood. Here, we show that myenteric glia display regional heterogeneity in their responses to neuromodulators in the duodenum and the colon, which are functionally distinct organs. Glial-mediated control of intestinal motility is region and pathway specific. Four myenteric glial subtypes are present within a given gut region that are differently distributed between gut regions. These data provide functional and regional insights into enteric circuit specificity in the adult enteric nervous system.
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28
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Tateishi AT, Okuma Y. Onco-biome in pharmacotherapy for lung cancer: a narrative review. Transl Lung Cancer Res 2022; 11:2332-2345. [PMID: 36519027 PMCID: PMC9742621 DOI: 10.21037/tlcr-22-299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 10/11/2022] [Indexed: 08/30/2023]
Abstract
BACKGROUND AND OBJECTIVE The gut microbiota (GM) was recently recognized to play an important role in modulating systemic immune responses and is known to influence the effects or adverse events of immune checkpoint blockade (ICB) or carcinogenesis by crosstalk with regulators of cancer-related immunity, and this relationship is complex and multifactorial. Diversity in the gut microbiome and the abundance of specific bacterial species have been identified to be associated with better response and prognosis. Therefore, the purpose of the current interest in the gut microbiome is to enable modulation of the immune system in donor cancer patients by the administration of specific bacterial species and enabling their dominance. To understand this "terra incognita" is to uncover the role of the mechanisms underlying unknown organ functions, and this knowledge will lead to enhanced immunotherapy for lung cancer patients. METHODS In this article, we summarized the literature on the relationship between the microbiome and lung cancer and the potential of the microbiome as a therapeutic target. KEY CONTENT AND FINDINGS This article is organized into the following sections: introduction, methods, microbiota and cancer development, microbiota and lung cancer treatment, future directions, and conclusion. CONCLUSIONS The gut microbiome is currently becoming the hallmark of cancer research and has an established and critical role in regulating antitumor immunity and the response to ICB in patients with lung cancers.
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29
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Hamnett R, Dershowitz LB, Sampathkumar V, Wang Z, Gomez-Frittelli J, De Andrade V, Kasthuri N, Druckmann S, Kaltschmidt JA. Regional cytoarchitecture of the adult and developing mouse enteric nervous system. Curr Biol 2022; 32:4483-4492.e5. [PMID: 36070775 PMCID: PMC9613618 DOI: 10.1016/j.cub.2022.08.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 07/19/2022] [Accepted: 08/11/2022] [Indexed: 11/22/2022]
Abstract
The organization and cellular composition of tissues are key determinants of their biological function. In the mammalian gastrointestinal (GI) tract, the enteric nervous system (ENS) intercalates between muscular and epithelial layers of the gut wall and can control GI function independent of central nervous system (CNS) input.1 As in the CNS, distinct regions of the GI tract are highly specialized and support diverse functions, yet the regional and spatial organization of the ENS remains poorly characterized.2 Cellular arrangements,3,4 circuit connectivity patterns,5,6 and diverse cell types7-9 are known to underpin ENS functional complexity and GI function, but enteric neurons are most typically described only as a uniform meshwork of interconnected ganglia. Here, we present a bird's eye view of the mouse ENS, describing its previously underappreciated cytoarchitecture and regional variation. We visually and computationally demonstrate that enteric neurons are organized in circumferential neuronal stripes. This organization emerges gradually during the perinatal period, with neuronal stripe formation in the small intestine (SI) preceding that in the colon. The width of neuronal stripes varies throughout the length of the GI tract, and distinct neuronal subtypes differentially populate specific regions of the GI tract, with stark contrasts between SI and colon as well as within subregions of each. This characterization provides a blueprint for future understanding of region-specific GI function and identifying ENS structural correlates of diverse GI disorders.
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Affiliation(s)
- Ryan Hamnett
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA; Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA 94305, USA
| | - Lori B Dershowitz
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA; Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA 94305, USA
| | - Vandana Sampathkumar
- Department of Neurobiology, University of Chicago, Chicago, IL 60637, USA; Biosciences Division, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Ziyue Wang
- Department of Applied Physics, Stanford University, Stanford, CA 94305, USA; Department of Neurobiology, Stanford University, Stanford, CA 94305, USA
| | - Julieta Gomez-Frittelli
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA 94305, USA; Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Vincent De Andrade
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Narayanan Kasthuri
- Department of Neurobiology, University of Chicago, Chicago, IL 60637, USA; Biosciences Division, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Shaul Druckmann
- Department of Neurobiology, Stanford University, Stanford, CA 94305, USA; Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA 94305, USA
| | - Julia A Kaltschmidt
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA; Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA 94305, USA.
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Schneider KM, Kim J, Bahnsen K, Heuckeroth RO, Thaiss CA. Environmental perception and control of gastrointestinal immunity by the enteric nervous system. Trends Mol Med 2022; 28:989-1005. [PMID: 36208986 DOI: 10.1016/j.molmed.2022.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/25/2022] [Accepted: 09/07/2022] [Indexed: 12/12/2022]
Abstract
The enteric nervous system (ENS) forms a versatile sensory system along the gastrointestinal tract that interacts with most cell types in the bowel. Herein, we portray host-environment interactions at the intestinal mucosal surface through the lens of the enteric nervous system. We describe local cellular interactions as well as long-range circuits between the enteric, central, and peripheral nervous systems. Additionally, we discuss recently discovered mechanisms by which enteric neurons and glia respond to biotic and abiotic environmental changes and how they regulate intestinal immunity and inflammation. The enteric nervous system emerges as an integrative sensory system with manifold immunoregulatory functions under both homeostatic and pathophysiological conditions.
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Affiliation(s)
- Kai Markus Schneider
- Microbiology Department, Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, PA, USA; Institute for Diabetes, Obesity and Metabolism, Perelman School of Medicine, University of Pennsylvania, PA, USA
| | - Jihee Kim
- Microbiology Department, Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, PA, USA; Institute for Diabetes, Obesity and Metabolism, Perelman School of Medicine, University of Pennsylvania, PA, USA
| | - Klaas Bahnsen
- Microbiology Department, Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, PA, USA; Institute for Diabetes, Obesity and Metabolism, Perelman School of Medicine, University of Pennsylvania, PA, USA
| | - Robert O Heuckeroth
- Department of Pediatrics, Children's Hospital of Philadelphia Research Institute, University of Pennsylvania, Philadelphia, PA 19104, USA; Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Christoph A Thaiss
- Microbiology Department, Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, PA, USA; Institute for Diabetes, Obesity and Metabolism, Perelman School of Medicine, University of Pennsylvania, PA, USA.
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31
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Frontiers and future perspectives of neuroimmunology. FUNDAMENTAL RESEARCH 2022. [DOI: 10.1016/j.fmre.2022.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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32
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Li W, Li L, Yang F, Hu Q, Xiong D. Correlation between gut bacteria Phascolarctobacterium and exogenous metabolite α-linolenic acid in T2DM: a case-control study. ANNALS OF TRANSLATIONAL MEDICINE 2022; 10:1056. [PMID: 36330416 PMCID: PMC9622494 DOI: 10.21037/atm-22-3967] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 08/31/2022] [Indexed: 01/10/2023]
Abstract
Background The relationship between gut microbiota and metabolites play an important role in the occurrence and development of type 2 diabetes mellitus (T2DM). However, the interaction between intestinal flora abundance and metabolites is still unclear. The purpose of this study was to investigate the correlation of the interaction network between intestinal flora and fecal metabolites in regulating the occurrence of T2DM. Methods This a case-control study. T2DM patients with different glucose levels and healthy people were divided into case group and normal controls (NC) group. Fasting plasma and fecal samples were collected from the subjects. Ultra-performance liquid chromatography-tandem mass spectrometry (LC-MS) untargeted fecal metabolomics was used to detect small molecular metabolites within 1,500 Da in two groups. The diversity and richness of intestinal flora were analyzed by the 16SrRNA third-generation full-length sequencing technique and the correlation between intestinal microflora and different metabolites was evaluated. Results A total of 30 patients with T2DM and 21 NC were included for analysis, glycated hemoglobin (HbAlc) (P<0.001), fasting blood glucose (FBG) (P<0.001), total triglycerides (TG) (P=0.002), and fasting serum insulin (FINS) (P=0.026) were significantly higher in the T2DM group compared with the NC group. The fecal metabolomics profiles of the T2DM group and NC group were significantly different, and 355 different metabolites were identified among the two. Compared with the NC group, the levels of ornithine (P=0.04), L-lysine (P=0.03), glutamate (P=0.01), alpha-linolenic acid (P=0.004), traumatin (P=0.05), and erucic acid (P=0.004) in the T2DM group decreased significantly, while PC[18:3(6Z,9Z,12Z)/24:1(15Z)] (P<0.001) levels increased. Compared with the NC group, the richness of Megamonas and Escherichia increased in T2DM patients, while that of Bacteroidota and Phascolarctobacterium were lower. Pearson correlation analysis revealed associations between gut microbiota and faecal metabolites, and Phascolarctobacterium was positively correlated with alpha-linolenic acid (r=0.72, P<0.001). Conclusions There may be a mutual regulatory network between intestinal bacteria and fecal metabolites in T2DM. The increased abundance of Phascolarctobacterium may increase alpha-linolenic acid uptake, and alpha-linolenic acid may also increase the abundance of intestinal Phascolarctobacterium in vivo after metabolic transformation. The combination of the two may play an important role in the treatment of diabetes.
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Affiliation(s)
- Weidong Li
- Department of Laboratory Medicine, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China;,College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Lisha Li
- Department of Laboratory Medicine, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fujie Yang
- Department of Laboratory Medicine, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China;,College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Qiongying Hu
- Department of Laboratory Medicine, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Daqian Xiong
- Department of Laboratory Medicine, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Juarez VM, Montalbine AN, Singh A. Microbiome as an immune regulator in health, disease, and therapeutics. Adv Drug Deliv Rev 2022; 188:114400. [PMID: 35718251 PMCID: PMC10751508 DOI: 10.1016/j.addr.2022.114400] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 05/11/2022] [Accepted: 06/12/2022] [Indexed: 11/27/2022]
Abstract
New discoveries in drugs and drug delivery systems are focused on identifying and delivering a pharmacologically effective agent, potentially targeting a specific molecular component. However, current drug discovery and therapeutic delivery approaches do not necessarily exploit the complex regulatory network of an indispensable microbiota that has been engineered through evolutionary processes in humans or has been altered by environmental exposure or diseases. The human microbiome, in all its complexity, plays an integral role in the maintenance of host functions such as metabolism and immunity. However, dysregulation in this intricate ecosystem has been linked with a variety of diseases, ranging from inflammatory bowel disease to cancer. Therapeutics and bacteria have an undeniable effect on each other and understanding the interplay between microbes and drugs could lead to new therapies, or to changes in how existing drugs are delivered. In addition, targeting the human microbiome using engineered therapeutics has the potential to address global health challenges. Here, we present the challenges and cutting-edge developments in microbiome-immune cell interactions and outline novel targeting strategies to advance drug discovery and therapeutics, which are defining a new era of personalized and precision medicine.
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Affiliation(s)
- Valeria M Juarez
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA, United States
| | - Alyssa N Montalbine
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA, United States
| | - Ankur Singh
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA, United States; Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, United States.
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Yu S, Kong L, Gu L, Zhu Y, Liu X, Sang Y, Wang Q, Wang S, Zhang D, Cao H, Tao F, Liu K. Typical antibiotic exposure and dysglycemia risk in an elderly Chinese population. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:59701-59711. [PMID: 35394631 DOI: 10.1007/s11356-022-20056-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
Studies examined the connection between antibiotic exposure in urine and dysglycemia risk (including prediabetes and diabetes) in the elderly were limited. Multiple linear regression, binary logistic regression, restricted cubic splines (RCS), and stratified analysis were applied to analyze the relationship between antibiotic exposure and dysglycemia risk. We observed that sulfaclozine exposure 0.07 (95% confidence interval [CI]: 0.01-0.23) significantly increased fasting blood glucose (FBG) level. By mechanism, usage, and antimicrobial action, sulfonamides 0.08 (95% CI: 0.06-0.36), veterinary antibiotics (VA) 0.07 (95% CI: 0.01-0.30), or bacteriostatic antibiotics 0.07 (95% CI: 0.02-0.29) significantly increased FBG level. Additionally, sulfaclozine exposure 1.54 (95% CI: 1.02-2.33) resulted in a higher dysglycemia risk, while doxycycline exposure 0.53 (95% CI: 0.30-0.95) resulted in a lower dysglycemia risk. By mechanism, usage, and antimicrobial action, sulfonamides 1.44 (95% CI: 1.02-2.04), VA 1.68 (95% CI: 1.21-2.35), or bacteriostatic antibiotics 1.40 (95% CI: 1.02-1.93) exposure had a higher dysglycemia risk. Taken together, exposure to sulfonamides, VA, especially sulfaclozine, was correlated with a higher dysglycemia risk in the elderly. Exposure to bacteriostatic antibiotics was associated with a higher dysglycemia risk in the female.
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Affiliation(s)
- Shuixin Yu
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China
- NHC Key Laboratory of Study On Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Li Kong
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China
- NHC Key Laboratory of Study On Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Lvfen Gu
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China
- NHC Key Laboratory of Study On Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Yitian Zhu
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Xinji Liu
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Yanru Sang
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Qunan Wang
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Sufang Wang
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Dongmei Zhang
- School of Health Management, Anhui Medical University, Hefei, 230032, China
| | - Hongjuan Cao
- Lu'an Center of Disease Control and Prevention, Lu'an, Anhui, 237000, China
| | - Fangbiao Tao
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China
- NHC Key Laboratory of Study On Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Kaiyong Liu
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China.
- Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China.
- NHC Key Laboratory of Study On Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, China.
- Anhui Provincial Key Laboratory of Population Health and Aristogenics, No 81 Meishan Road, Hefei, 230032, Anhui, China.
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Cox TO, Lundgren P, Nath K, Thaiss CA. Metabolic control by the microbiome. Genome Med 2022; 14:80. [PMID: 35906678 PMCID: PMC9338551 DOI: 10.1186/s13073-022-01092-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 07/15/2022] [Indexed: 12/20/2022] Open
Abstract
The interaction between the metabolic activities of the intestinal microbiome and its host forms an important part of health. The basis of this interaction is in part mediated by the release of microbially-derived metabolites that enter the circulation. These products of microbial metabolism thereby interface with the immune, metabolic, or nervous systems of the host to influence physiology. Here, we review the interactions between the metabolic activities of the microbiome and the systemic metabolism of the host. The concept that the endocrine system includes more than just the eukaryotic host component enables the rational design of exogenous interventions that shape human metabolism. An improved mechanistic understanding of the metabolic microbiome-host interaction may therefore pioneer actionable microbiota-based diagnostics or therapeutics that allow the control of host systemic metabolism via the microbiome.
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Affiliation(s)
- Timothy O Cox
- Microbiology Department, Institute for Immunology, and Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Patrick Lundgren
- Microbiology Department, Institute for Immunology, and Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Kirti Nath
- Microbiology Department, Institute for Immunology, and Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Christoph A Thaiss
- Microbiology Department, Institute for Immunology, and Institute for Diabetes, Obesity & Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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Spencer NJ, Hibberd TJ. GLP-1 appetite control via intestinofugal neurons. Cell Res 2022; 32:711-712. [PMID: 35794368 PMCID: PMC9343648 DOI: 10.1038/s41422-022-00692-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Leven P, Schneider R, Siemens KD, Jackson WS, Wehner S. Application of a RiboTag-based approach to generate and analyze mRNA from enteric neural cells. Neurogastroenterol Motil 2022; 34:e14309. [PMID: 34939271 DOI: 10.1111/nmo.14309] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 11/22/2021] [Accepted: 11/29/2021] [Indexed: 02/08/2023]
Abstract
BACKGROUND Transcriptional profiling of specific intestinal cell populations under health and disease is generally based on traditional sorting approaches followed by gene expression analysis. Therein, specific cell populations are identified either by expressing reporter genes under a cell type-specific promotor or by specific surface antigens. This method provides adequate results for blood-derived and tissue-resident immune cells. However, in stromal cell analysis, cellular stress due to digestion often results in degraded RNA. Particularly, ramified cells integrated into the tissue, such as enteric neurons and glial cells, suffer from these procedures. These cell types are involved in various intestinal processes, including a prominent immune-regulatory role, which requires suitable approaches to generate cell-specific transcriptional profiles. METHODS Sox10iCreERT2 and choline acetyltransferase (ChATCre ) mice were crossed with mice labeling the ribosomal Rpl22 protein upon Cre activity with a hemagglutinin tag (Rpl22-HA, termed RiboTag). This approach enabled cellular targeting of enteric glia and neurons and the immediate isolation of cell-specific mRNA from tissue lysates without the need for cell sorting. KEY RESULTS We verified the specific expression of Rpl22-HA in enteric glia and neurons and provided gene expression data demonstrating a successful enrichment of either Sox-10+ glial or ChAT+ neuronal mRNAs by the RiboTag-mRNA procedure using qPCR and RNA-Seq analysis. CONCLUSIONS AND INFERENCES We present a robust and selective protocol that allows the generation of cell type-specific transcriptional in vivo snapshots of distinct enteric cell populations that will be especially useful for various intestinal disease models involving peripheral neural cells.
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Affiliation(s)
- Patrick Leven
- Department of Surgery, University Hospital Bonn, Bonn, Germany
| | | | - Kevin D Siemens
- Department of Surgery, University Hospital Bonn, Bonn, Germany
| | - Walker S Jackson
- Department of Biomedical and Clinical Sciences, Wallenberg Center for Molecular Medicine, Linköping University, Linköping, Sweden
| | - Sven Wehner
- Department of Surgery, University Hospital Bonn, Bonn, Germany
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Zhang Y, Chen H, Lu M, Cai J, Lu B, Luo C, Dai M. Habitual Diet Pattern Associations with Gut Microbiome Diversity and Composition: Results from a Chinese Adult Cohort. Nutrients 2022; 14:nu14132639. [PMID: 35807820 PMCID: PMC9268000 DOI: 10.3390/nu14132639] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 06/22/2022] [Accepted: 06/22/2022] [Indexed: 01/27/2023] Open
Abstract
The influence of long-term diet on gut microbiota is an active area of investigation. The present work aimed to explore the associations between habitual diet patterns and gut microbiota in a large sample of asymptomatic Chinese adults. The gut microbiome was profiled through the sequencing of the 16S rRNA gene in stool samples from 702 Chinese adults aged 50–75 years who underwent colonoscopies and were diagnosed to be free of colorectal neoplasm. Long-term dietary consumption was assessed through a food-frequency questionnaire. The microbial associations with specific food groups and the posteriori dietary pattern were tested using the Kruskal–Wallis H test, permutational ANOVAs, and multivariate analyses with linear models. The Shannon indexes generally shared similar levels across different food intake frequency groups. Whole grain and vegetable intakes totally explained 1.46% of the microbiota compositional variance. Using the data-driven posteriori approach, a general dietary pattern characterized by lower intakes of refined grains was highlighted to be associated with higher abundances of the genus Anaerostipes and a species of it. We also observed 17 associations between various food group intakes and specific genera and species. For instance, the relative abundances of the genus Weissella and an uncultured species of it were negatively associated with red meat intake. The results of this study support the idea that the usual dietary consumption measured by certain food items or summary indexes is associated with gut microbial features. These results deepen the understanding of complex relationships of diet and gut microbiota, as well as their implications for gut microbiome studies of human chronic diseases.
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Affiliation(s)
- Yuhan Zhang
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China; (Y.Z.); (M.L.); (B.L.); (C.L.)
| | - Hongda Chen
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China; (Y.Z.); (M.L.); (B.L.); (C.L.)
- Correspondence: (H.C.); (M.D.); Tel.: +86-10-6915-4660 (H.C.); +86-10-6915-4651 (M.D.)
| | - Ming Lu
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China; (Y.Z.); (M.L.); (B.L.); (C.L.)
| | - Jie Cai
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China;
| | - Bin Lu
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China; (Y.Z.); (M.L.); (B.L.); (C.L.)
| | - Chenyu Luo
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China; (Y.Z.); (M.L.); (B.L.); (C.L.)
| | - Min Dai
- Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China; (Y.Z.); (M.L.); (B.L.); (C.L.)
- Correspondence: (H.C.); (M.D.); Tel.: +86-10-6915-4660 (H.C.); +86-10-6915-4651 (M.D.)
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Cuddihey H, MacNaughton WK, Sharkey KA. Role of the Endocannabinoid System in the Regulation of Intestinal Homeostasis. Cell Mol Gastroenterol Hepatol 2022; 14:947-963. [PMID: 35750314 PMCID: PMC9500439 DOI: 10.1016/j.jcmgh.2022.05.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/09/2022] [Accepted: 05/25/2022] [Indexed: 12/15/2022]
Abstract
The maintenance of intestinal homeostasis is fundamentally important to health. Intestinal barrier function and immune regulation are key determinants of intestinal homeostasis and are therefore tightly regulated by a variety of signaling mechanisms. The endocannabinoid system is a lipid mediator signaling system widely expressed in the gastrointestinal tract. Accumulating evidence suggests the endocannabinoid system is a critical nexus involved in the physiological processes that underlie the control of intestinal homeostasis. In this review we will illustrate how the endocannabinoid system is involved in regulation of intestinal permeability, fluid secretion, and immune regulation. We will also demonstrate a reciprocal regulation between the endocannabinoid system and the gut microbiome. The role of the endocannabinoid system is complex and multifaceted, responding to both internal and external factors while also serving as an effector system for the maintenance of intestinal homeostasis.
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Affiliation(s)
- Hailey Cuddihey
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada,Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada,Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Wallace K. MacNaughton
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada,Alberta Children’s Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada,Inflammation Research Network, University of Calgary, Calgary, Alberta, Canada,Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Keith A. Sharkey
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada,Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada,Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada,Correspondence Address correspondence to: Keith Sharkey, PhD, Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada.
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Molecular profiling of enteric nervous system cell lineages. Nat Protoc 2022; 17:1789-1817. [PMID: 35676375 DOI: 10.1038/s41596-022-00697-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 03/04/2022] [Indexed: 11/08/2022]
Abstract
The enteric nervous system (ENS) is an extensive network of enteric neurons and glial cells that is intrinsic to the gut wall and regulates almost all aspects of intestinal physiology. While considerable advancement has been made in understanding the genetic programs regulating ENS development, there is limited understanding of the molecular pathways that control ENS function in adult stages. One of the limitations in advancing the molecular characterization of the adult ENS relates to technical difficulties in purifying healthy neurons and glia from adult intestinal tissues. To overcome this, we developed novel methods for performing transcriptomic analysis of enteric neurons and glia, which are based on the isolation of fluorescently labeled nuclei. Here we provide a step-by-step protocol for the labeling of adult mouse enteric neuronal nuclei using adeno-associated-virus-mediated gene transfer, isolation of the labeled nuclei by fluorimetric analysis, RNA purification and nuclear RNA sequencing. This protocol has also been adapted for the isolation of enteric neuron and glia nuclei from myenteric plexus preparations from adult zebrafish intestine. Finally, we describe a method for visualization and quantification of RNA in myenteric ganglia: Spatial Integration of Granular Nuclear Signals (SIGNS). By following this protocol, it takes ~3 d to generate RNA and create cDNA libraries for nuclear RNA sequencing and 4 d to carry out high-resolution RNA expression analysis on ENS tissues.
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Angosto-Bazarra D, Molina-López C, Pelegrín P. Physiological and pathophysiological functions of NLRP6: pro- and anti-inflammatory roles. Commun Biol 2022; 5:524. [PMID: 35650327 PMCID: PMC9160023 DOI: 10.1038/s42003-022-03491-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 05/12/2022] [Indexed: 12/26/2022] Open
Abstract
The nucleotide-binding oligomerization and leucine-rich repeat receptor (NLR) protein family consists of important immune sensors that form inflammasomes, a cytosolic multi-protein platform that induces caspase-1 activation and is involved in different inflammatory pathologies. The NLR family pyrin domain containing 6 (NLRP6) is a receptor that can signal by forming inflammasomes, but which can also play an important role without forming inflammasomes. NLRP6 regulates intestinal homeostasis and inflammation, but also is involved in cancer, the nervous system or liver diseases, with both protective and deleterious consequences. In the present article, we review the different roles of NLRP6 in these processes and offer new insights into NLRP6 activation. This review discusses emerging roles for the NLR family pyrin domain containing 6 receptor (NLRP6) in intestinal homeostasis, inflammation, cancer, the nervous system and liver disease.
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Affiliation(s)
- Diego Angosto-Bazarra
- Línea de Inflamación Molecular, Instituto Murciano de Investigación Biosanitaria IMIB-Arrixaca, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain.
| | - Cristina Molina-López
- Línea de Inflamación Molecular, Instituto Murciano de Investigación Biosanitaria IMIB-Arrixaca, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain
| | - Pablo Pelegrín
- Línea de Inflamación Molecular, Instituto Murciano de Investigación Biosanitaria IMIB-Arrixaca, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain. .,Department of Biochemistry and Molecular Biology B and Immunology, Faculty of Medicine, University of Murcia, 30120, Murcia, Spain.
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42
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Li K, Ly K, Mehta S, Braithwaite A. Importance of crosstalk between the microbiota and the neuroimmune system for tissue homeostasis. Clin Transl Immunology 2022; 11:e1394. [PMID: 35620584 PMCID: PMC9125509 DOI: 10.1002/cti2.1394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 04/30/2022] [Accepted: 05/01/2022] [Indexed: 11/23/2022] Open
Abstract
The principal function of inflammation is cellular defence against ‘danger signals’ such as tissue injury and pathogen infection to maintain the homeostasis of the organism. The initiation and progression of inflammation are not autonomous as there is substantial evidence that inflammation is known to be strongly influenced by ‘neuroimmune crosstalk’, involving the production and expression of soluble signalling molecules that interact with cell surface receptors. In addition, microbiota have been found to be involved in the development and function of the nervous and immune systems and play an important role in health and disease. Herein, we provide an outline of the mechanisms of neuroimmune communication in the regulation of inflammation and immune response and then provide evidence for the involvement of microbiota in the development and functions of the host nervous and immune systems. It appears that the nervous and immune systems in multicellular organisms have co‐evolved with the microbiota, such that all components are in communication to maximise the ability of the organism to adapt to a wide range of environmental stresses to maintain or restore tissue homeostasis.
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Affiliation(s)
- Kunyu Li
- Department of Pathology Dunedin School of Medicine University of Otago Dunedin New Zealand
| | - Kevin Ly
- Department of Pathology Dunedin School of Medicine University of Otago Dunedin New Zealand
| | - Sunali Mehta
- Department of Pathology Dunedin School of Medicine University of Otago Dunedin New Zealand
| | - Antony Braithwaite
- Department of Pathology Dunedin School of Medicine University of Otago Dunedin New Zealand
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43
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Cook TM, Mansuy-Aubert V. Communication between the gut microbiota and peripheral nervous system in health and chronic disease. Gut Microbes 2022; 14:2068365. [PMID: 35482894 PMCID: PMC9067538 DOI: 10.1080/19490976.2022.2068365] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Trillions of bacteria reside within our gastrointestinal tract, ideally forming a mutually beneficial relationship between us. However, persistent changes in diet and lifestyle in the western diet and lifestyle contribute to a damaging of the gut microbiota-host symbiosis leading to diseases such as obesity and irritable bowel syndrome. Many symptoms and comorbidities associated with these diseases stem from dysfunctional signaling in peripheral neurons. Our peripheral nervous system (PNS) is comprised of a variety of sensory, autonomic, and enteric neurons which coordinate key homeostatic functions such as gastrointestinal motility, digestion, immunity, feeding behavior, glucose and lipid homeostasis, and more. The composition and signaling of bacteria in our gut dramatically influences how our peripheral neurons regulate these functions, and we are just beginning to uncover the molecular mechanisms mediating this communication. In this review, we cover the general anatomy and function of the PNS, and then we discuss how the molecules secreted or stimulated by gut microbes signal through the PNS to alter host development and physiology. Finally, we discuss how leveraging the power of our gut microbes on peripheral nervous system signaling may offer effective therapies to counteract the rise in chronic diseases crippling the western world.
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Affiliation(s)
- Tyler M. Cook
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL, USA
| | - Virginie Mansuy-Aubert
- Department of Cell and Molecular Physiology, Loyola University Chicago, Maywood, IL, USA,CONTACT Virginie Mansuy-Aubert Loyola University Chicago, Maywood, IL, USA
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44
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Rohm TV, Keller L, Bosch AJT, AlAsfoor S, Baumann Z, Thomas A, Wiedemann SJ, Steiger L, Dalmas E, Wehner J, Rachid L, Mooser C, Yilmaz B, Fernandez Trigo N, Jauch AJ, Wueest S, Konrad D, Henri S, Niess JH, Hruz P, Ganal-Vonarburg SC, Roux J, Meier DT, Cavelti-Weder C. Targeting colonic macrophages improves glycemic control in high-fat diet-induced obesity. Commun Biol 2022; 5:370. [PMID: 35440795 PMCID: PMC9018739 DOI: 10.1038/s42003-022-03305-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 03/22/2022] [Indexed: 12/13/2022] Open
Abstract
The obesity epidemic continues to worsen worldwide. However, the mechanisms initiating glucose dysregulation in obesity remain poorly understood. We assessed the role that colonic macrophage subpopulations play in glucose homeostasis in mice fed a high-fat diet (HFD). Concurrent with glucose intolerance, pro-inflammatory/monocyte-derived colonic macrophages increased in mice fed a HFD. A link between macrophage numbers and glycemia was established by pharmacological dose-dependent ablation of macrophages. In particular, colon-specific macrophage depletion by intrarectal clodronate liposomes improved glucose tolerance, insulin sensitivity, and insulin secretion capacity. Colonic macrophage activation upon HFD was characterized by an interferon response and a change in mitochondrial metabolism, which converged in mTOR as a common regulator. Colon-specific mTOR inhibition reduced pro-inflammatory macrophages and ameliorated insulin secretion capacity, similar to colon-specific macrophage depletion, but did not affect insulin sensitivity. Thus, pharmacological targeting of colonic macrophages could become a potential therapy in obesity to improve glycemic control. Expansion of pro-inflammatory macrophages in the colon occurs early after high-fat diet initiation, prior to macrophage accumulation in the adipose tissue, in a microbiome-dependent fashion. Macrophage depletion systemically and/or exclusively in the colon improves glucose metabolism.
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Affiliation(s)
- Theresa V Rohm
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Lena Keller
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Angela J T Bosch
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Shefaa AlAsfoor
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Zora Baumann
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | | | - Sophia J Wiedemann
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Laura Steiger
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Elise Dalmas
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Josua Wehner
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Leila Rachid
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Catherine Mooser
- Department of Visceral Surgery und Medicine, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Bahtiyar Yilmaz
- Department of Visceral Surgery und Medicine, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Nerea Fernandez Trigo
- Department of Visceral Surgery und Medicine, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Annaise J Jauch
- Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Stephan Wueest
- Division of Pediatric Endocrinology and Diabetology, and Children's Research Center, University Children's Hospital, University of Zurich, Zurich, Switzerland
| | - Daniel Konrad
- Division of Pediatric Endocrinology and Diabetology, and Children's Research Center, University Children's Hospital, University of Zurich, Zurich, Switzerland
| | - Sandrine Henri
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
| | - Jan H Niess
- Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland.,Clarunis, Department of Visceral Surgery, University Center for Gastrointestinal and Liver Diseases, St. Clara Hospital and University Hospital Basel, Basel, Switzerland
| | - Petr Hruz
- Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland.,Clarunis, Department of Visceral Surgery, University Center for Gastrointestinal and Liver Diseases, St. Clara Hospital and University Hospital Basel, Basel, Switzerland
| | - Stephanie C Ganal-Vonarburg
- Department of Visceral Surgery und Medicine, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Julien Roux
- Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland.,Swiss Institute of Bioinformatics (SIB), Basel, Switzerland
| | - Daniel T Meier
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland.,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland
| | - Claudia Cavelti-Weder
- Clinic of Endocrinology, Diabetes and Metabolism, University Hospital Basel, Basel, Switzerland. .,Department of Biomedicine (DBM), University of Basel, University Hospital Basel, Basel, Switzerland. .,Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland.
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45
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Kong F, Fang C, Zhang Y, Duan L, Du D, Xu G, Li X, Li H, Yin Y, Xu H, Zhang K. Abundance and Metabolism Disruptions of Intratumoral Microbiota by Chemical and Physical Actions Unfreeze Tumor Treatment Resistance. ADVANCED SCIENCE 2022; 9:e2105523. [PMID: 35037431 PMCID: PMC8895135 DOI: 10.1002/advs.202105523] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/17/2021] [Indexed: 12/19/2022]
Abstract
Intratumoral or intestinal microbiota correlates with tumorigenesis and progression, and microbiota regulation for reinforcing various anti-tumor approaches is of significant importance, which, however, suffers from no precise regulation method and unclear underlying mechanism. Herein, a microbiome metabolism-engineered phototherapy strategy is established, wherein Nb2 C/Au nanocomposite and the corresponding phototherapy are harnessed to realize "chemical" and "physical" bacterial regulations. Flora analysis and mass spectrometry (MS) and metabonomics combined tests demonstrate that the synergistic microbiota regulations can alter the abundance, diversity of intratumoral microbiome, and disrupt metabolic pathways of microbiome and tumor microenvironment, wherein the differential singling pathways and biosynthetic necessities or metabolites that can affect tumor progression are identified. As well, anti-TNFα is introduced to unite with bacterial regulation to synergistically mitigate bacterial-induced inflammation, which, along with the metabolism disruptions of intratumoral microbiota and tumor microenvironment, unfreezes tumor resistance and harvests significantly-intensified phototherapy-based anti-tumor outcomes against 4T1 and CT26 tumors. The clear underlying principles of microbiome-regulated tumorigenesis and the established microbiome metabolism regulation method provide distinctive insights into tumor therapy, and can be also extended to other gut microbiome-associated lesions interference.
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Affiliation(s)
- Fanlei Kong
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
- Department of Medical Ultrasound Affiliated Hangzhou First People's Hospital Zhejiang University School of Medicine No. 261 Huansha Road Hangzhou 310006 P. R. China
| | - Chao Fang
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
- Department of Medical Ultrasound and Department of Radiology Guangxi Medical University Cancer Hospital and Guangxi Key Laboratory of Bio‐targeting Theranostics Guangxi Medical University No. 71 Hedi Road Nanning 530021 P. R. China
| | - Yan Zhang
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
| | - Lixia Duan
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
- Department of Medical Ultrasound and Department of Radiology Guangxi Medical University Cancer Hospital and Guangxi Key Laboratory of Bio‐targeting Theranostics Guangxi Medical University No. 71 Hedi Road Nanning 530021 P. R. China
| | - Dou Du
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
| | - Guang Xu
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
| | - Xiaolong Li
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
| | - Hongyan Li
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
| | - Yifei Yin
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
| | - Huixiong Xu
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
| | - Kun Zhang
- Department of Medical Ultrasound and Central Laboratory Ultrasound Research and Education Institute Shanghai Tenth People's Hospital Tongji University School of Medicine No. 301 Yan‐chang‐zhong Road Shanghai 200072 P. R. China
- Department of Medical Ultrasound and Department of Radiology Guangxi Medical University Cancer Hospital and Guangxi Key Laboratory of Bio‐targeting Theranostics Guangxi Medical University No. 71 Hedi Road Nanning 530021 P. R. China
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Wierup N, Abels M, Shcherbina L, Lindqvist A. The role of CART in islet biology. Peptides 2022; 149:170708. [PMID: 34896575 DOI: 10.1016/j.peptides.2021.170708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/03/2021] [Accepted: 12/03/2021] [Indexed: 10/19/2022]
Abstract
Cocaine- and amphetamine-regulated transcript (CART) is mostly known for its appetite regulating effects in the central nervous system. However, CART is also highly expressed in the peripheral nervous system as well as in certain endocrine cells. Our group has dedicated more than 20 years to understand the role of CART in the pancreatic islets and in this review we summarize what is known to date about CART expression and function in the islets. CART is expressed in both islet cells and nerve fibers innervating the islets. Large species differences are at hand and CART expression is highly dynamic and increased during development, as well as in Type 2 Diabetes and certain endocrine tumors. In the human islets CART is expressed in alpha cells and beta cells and the expression is increased in T2D patients. CART increases insulin secretion, reduces glucagon secretion, and protects against beta cell death by reducing apoptosis and increasing proliferation. It is still not fully understood how CART mediates its effects or which receptors that are involved. Nevertheless, CART is endowed with several properties that are beneficial in a T2D perspective. Many of the described effects of CART resemble those of GLP-1, and interestingly CART has been found to potentiate some of the effects of GLP-1, paving the way for CART-based treatments in combination with GLP-1-based drugs.
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Affiliation(s)
- Nils Wierup
- Lund University Diabetes Centre, Malmö, Sweden.
| | - Mia Abels
- Lund University Diabetes Centre, Malmö, Sweden
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47
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Padhi P, Worth C, Zenitsky G, Jin H, Sambamurti K, Anantharam V, Kanthasamy A, Kanthasamy AG. Mechanistic Insights Into Gut Microbiome Dysbiosis-Mediated Neuroimmune Dysregulation and Protein Misfolding and Clearance in the Pathogenesis of Chronic Neurodegenerative Disorders. Front Neurosci 2022; 16:836605. [PMID: 35281490 PMCID: PMC8914070 DOI: 10.3389/fnins.2022.836605] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 02/04/2022] [Indexed: 12/14/2022] Open
Abstract
The human gut microbiota is a complex, dynamic, and highly diverse community of microorganisms. Beginning as early as in utero fetal development and continuing through birth to late-stage adulthood, the crosstalk between the gut microbiome and brain is essential for modulating various metabolic, neurodevelopmental, and immune-related pathways. Conversely, microbial dysbiosis – defined as alterations in richness and relative abundances – of the gut is implicated in the pathogenesis of several chronic neurological and neurodegenerative disorders. Evidence from large-population cohort studies suggests that individuals with neurodegenerative conditions have an altered gut microbial composition as well as microbial and serum metabolomic profiles distinct from those in the healthy population. Dysbiosis is also linked to psychiatric and gastrointestinal complications – comorbidities often associated with the prodromal phase of Parkinson’s disease (PD) and Alzheimer’s disease (AD). Studies have identified potential mediators that link gut dysbiosis and neurological disorders. Recent findings have also elucidated the potential mechanisms of disease pathology in the enteric nervous system prior to the onset of neurodegeneration. This review highlights the functional pathways and mechanisms, particularly gut microbe-induced chronic inflammation, protein misfolding, propagation of disease-specific pathology, defective protein clearance, and autoimmune dysregulation, linking gut microbial dysbiosis and neurodegeneration. In addition, we also discuss how pathogenic transformation of microbial composition leads to increased endotoxin production and fewer beneficial metabolites, both of which could trigger immune cell activation and enteric neuronal dysfunction. These can further disrupt intestinal barrier permeability, aggravate the systemic pro-inflammatory state, impair blood–brain barrier permeability and recruit immune mediators leading to neuroinflammation and neurodegeneration. Continued biomedical advances in understanding the microbiota-gut-brain axis will extend the frontier of neurodegenerative disorders and enable the utilization of novel diagnostic and therapeutic strategies to mitigate the pathological burden of these diseases.
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Affiliation(s)
- Piyush Padhi
- Parkinson’s Disorder Research Laboratory, Department of Biomedical Sciences, Iowa State University, Ames, IA, United States
- Department of Physiology and Pharmacology, Center for Brain Sciences and Neurodegenerative Diseases, University of Georgia, Athens, GA, United States
| | - Carter Worth
- Parkinson’s Disorder Research Laboratory, Department of Biomedical Sciences, Iowa State University, Ames, IA, United States
| | - Gary Zenitsky
- Department of Physiology and Pharmacology, Center for Brain Sciences and Neurodegenerative Diseases, University of Georgia, Athens, GA, United States
| | - Huajun Jin
- Department of Physiology and Pharmacology, Center for Brain Sciences and Neurodegenerative Diseases, University of Georgia, Athens, GA, United States
| | - Kumar Sambamurti
- Department of Neuroscience, Medical University of South Carolina, Charleston, SC, United States
| | - Vellareddy Anantharam
- Department of Physiology and Pharmacology, Center for Brain Sciences and Neurodegenerative Diseases, University of Georgia, Athens, GA, United States
| | - Arthi Kanthasamy
- Department of Physiology and Pharmacology, Center for Brain Sciences and Neurodegenerative Diseases, University of Georgia, Athens, GA, United States
| | - Anumantha G. Kanthasamy
- Parkinson’s Disorder Research Laboratory, Department of Biomedical Sciences, Iowa State University, Ames, IA, United States
- Department of Physiology and Pharmacology, Center for Brain Sciences and Neurodegenerative Diseases, University of Georgia, Athens, GA, United States
- *Correspondence: Anumantha G. Kanthasamy,
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48
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Profiling of the Bacterial Microbiota along the Murine Alimentary Tract. Int J Mol Sci 2022; 23:ijms23031783. [PMID: 35163705 PMCID: PMC8836272 DOI: 10.3390/ijms23031783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/27/2022] [Accepted: 01/28/2022] [Indexed: 12/13/2022] Open
Abstract
Here, the spatial distribution of the bacterial flora along the murine alimentary tract was evaluated using high throughput sequencing in wild-type and Tff3-deficient (Tff3KO) animals. Loss of Tff3 was linked to increased dextran sodium sulfate-induced colitis. This systematic study shows the results of 13 different regions from the esophagus to the rectum. The number of bacterial species (richness) increased from the esophagus to the rectum, from 50 to 200, respectively. Additionally, the bacterial community structure changed continuously; the highest changes were between the upper/middle and lower gastrointestinal compartments when comparing adjacent regions. Lactobacillus was the major colonizer in the upper/middle gastrointestinal tract, especially in the esophagus and stomach. From the caecum, a drastic diminution of Lactobacillus occurred, while members of Lachnospiraceae significantly increased. A significant change occurred in the bacterial community between the ascending and the transverse colon with Bacteroidetes being the major colonizers with relative constant abundance until the rectum. Interestingly, wild-type and Tff3KO animals did not show significant differences in their bacterial communities, suggesting that Tff3 is not involved in alterations of intraluminal or adhesive microbiota but is obviously important for mucosal protection, e.g., of the sensitive stem cells in the colonic crypts probably by a mucus plume.
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49
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Михеев РК, Романцова ТИ, Трошина ЕА, Григорян ОР, Андреева ЕН, Шереметьева ЕВ, Абсатарова ЮС, Мокрышева НГ. [Cocaine-amphetamine regulated transcript (CART) - promising omics breakthrough in the endocrinology]. PROBLEMY ENDOKRINOLOGII 2022; 68:4-8. [PMID: 35488751 PMCID: PMC9112847 DOI: 10.14341/probl12872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 01/26/2022] [Accepted: 01/25/2022] [Indexed: 12/16/2022]
Abstract
BACKGROUND The cocaine-amphetamine regulated transcript has been discovered long time ago (circa over 25 years ago) but still stays not enough investigated. Just during last five years scientist's society started providing interest to the genomic, proteomic and metabolic essence of the cocaine-amphetamine regulated transcript. AIM The evaluation of historical pathway and perspectives of the cocaine-amphetamine regulated transcript medical investigations. MATERIALS AND METHODS The literature search has been provided via Russian (eLibrary, CyberLeninka.ru) and international (PubMed, Cochrane Library) databases and among articles on Russian and English languages. The main criteria for article selection was free access and 2019-2021 years of publishing. Although the introduction is based on the articles published in 1989. The present article was created according to the federal project «Central and peripheral pathophysiological mechanisms of adipose tissue diseases and their clinical and hormonal manifestations патофизиологические механизмы развития болезней жировой ткани с учетом клинических и гормональных характеристик» (2020-2022)RESULTS AND CONCLUISON: It is necessary to keep on investigating genomic, proteomic and metabolomic markers because they contain important clues for successful resistance against human diseases. The 21st century is the era of transformation from simple clinical medicine to personalized science. For example, researches in the area of cocaine-amphetamine regulated transcript may result in invention of genetic medicine against dangerous metabolic diseases.
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Affiliation(s)
- Р. К. Михеев
- Национальный медицинский исследовательский центр эндокринологии
| | - Т. И. Романцова
- Первый московский государственный медицинский университет им. И.М. Сеченова (Сеченовский университет)
| | - Е. А. Трошина
- Национальный медицинский исследовательский центр эндокринологии
| | - О. Р. Григорян
- Национальный медицинский исследовательский центр эндокринологии
| | - Е. Н. Андреева
- Национальный медицинский исследовательский центр эндокринологии
| | | | | | - Н. Г. Мокрышева
- Национальный медицинский исследовательский центр эндокринологии
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50
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New Concepts of the Interplay Between the Gut Microbiota and the Enteric Nervous System in the Control of Motility. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1383:55-69. [PMID: 36587146 DOI: 10.1007/978-3-031-05843-1_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Propulsive gastrointestinal (GI) motility is critical for digestive physiology and host defense. GI motility is finely regulated by the intramural reflex pathways of the enteric nervous system (ENS). The ENS is in turn regulated by luminal factors: diet and the gut microbiota. The gut microbiota is a vast ecosystem of commensal bacteria, fungi, viruses, and other microbes. The gut microbiota not only regulates the motor programs of the ENS but also is critical for the normal structure and function of the ENS. In this chapter, we highlight recent research that has shed light on the microbial mechanisms of interaction with the ENS involved in the control of motility. Toll-like receptor signaling mechanisms have been shown to maintain the structural integrity of the ENS and the neurochemical phenotypes of enteric neurons, in part through the production of trophic factors including glia-derived neurotrophic factor. Microbiota-derived short-chain fatty acids and/or single-stranded RNA regulates the synthesis of serotonin in enterochromaffin cells, which are involved in the initiation of enteric reflexes, among other functions. Further evidence suggests a crucial role for microbial modulation of serotonin in maintaining the integrity of the ENS through enteric neurogenesis. Understanding the microbial pathways of enteric neural control sheds new light on digestive health and provides novel treatment strategies for GI motility disorders.
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