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Li G, Liu H, Yu Y, Wang Q, Yang C, Yan Y, Wang F, Mao Y. Desulfovibrio desulfuricans and its derived metabolites confer resistance to FOLFOX through METTL3. EBioMedicine 2024; 102:105041. [PMID: 38484555 PMCID: PMC10950750 DOI: 10.1016/j.ebiom.2024.105041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 02/06/2024] [Accepted: 02/19/2024] [Indexed: 03/24/2024] Open
Abstract
BACKGROUND Chemoresistance is a critical factor contributing to poor prognosis in clinical patients with cancer undergoing postoperative adjuvant chemotherapy. The role of gut microbiota in mediating resistance to tumour chemotherapy remains to be investigated. METHODS Patients with CRC were categorised into clinical benefit responders (CBR) and no clinical benefit responders (NCB) based on chemotherapy efficacy. Differential bacterial analysis using 16S rRNA sequencing revealed Desulfovibrio as a distinct microbe between the two groups. Employing a syngeneic transplantation model, we assessed the effect of Desulfovibrio on chemotherapy by measuring tumour burden, weight, and Ki-67 expression. We further explored the mechanisms underlying the compromised chemotherapeutic efficacy of Desulfovibrio using metabolomics, western blotting, colony formation, and cell apoptosis assays. FINDINGS In comparison, Desulfovibrio was more abundant in the NCB group. In vivo experiments revealed that Desulfovibrio colonisation in the gut weakened the efficacy of FOLFOX. Treatment with Desulfovibrio desulfuricans elevates serum S-adenosylmethionine (SAM) levels. Interestingly, SAM reduced the sensitivity of CRC cells to FOLFOX, thereby promoting the growth of CRC tumours. These experiments suggest that SAM promotes the growth and metastasis of CRC by driving the expression of methyltransferase-like 3 (METTL3). INTERPRETATION A high abundance of Desulfovibrio in the intestines indicates poor therapeutic outcomes for postoperative neoadjuvant FOLFOX chemotherapy in CRC. Desulfovibrio drives the manifestation of METTL3 in CRC, promoting resistance to FOLFOX chemotherapy by increasing the concentration of SAM. FUNDING This study is supported by Wuxi City Social Development Science and Technology Demonstration Project (N20201005).
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Affiliation(s)
- Guifang Li
- Department of Cancer Diagnosis and Treatment Center, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214000, Jiangsu, PR China; Wuxi Medical College of Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214000, Jiangsu, PR China
| | - Huan Liu
- Department of Cancer Diagnosis and Treatment Center, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214000, Jiangsu, PR China
| | - Yangmeng Yu
- Department of Cancer Diagnosis and Treatment Center, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214000, Jiangsu, PR China; Wuxi Medical College of Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214000, Jiangsu, PR China
| | - Qian Wang
- Department of Cancer Diagnosis and Treatment Center, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214000, Jiangsu, PR China; Wuxi Medical College of Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214000, Jiangsu, PR China
| | - Chen Yang
- Department of Cancer Diagnosis and Treatment Center, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214000, Jiangsu, PR China; Wuxi Medical College of Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214000, Jiangsu, PR China
| | - Yang Yan
- Department of Cancer Diagnosis and Treatment Center, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214000, Jiangsu, PR China; Wuxi Medical College of Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214000, Jiangsu, PR China
| | - Fang Wang
- Department of Cancer Diagnosis and Treatment Center, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214000, Jiangsu, PR China.
| | - Yong Mao
- Department of Cancer Diagnosis and Treatment Center, Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Wuxi, 214000, Jiangsu, PR China; Wuxi Medical College of Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214000, Jiangsu, PR China.
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Zhao S, Rogers MJ, Ding C, Xu G, He J. Interspecies Mobility of Organohalide Respiration Gene Clusters Enables Genetic Bioaugmentation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:4214-4225. [PMID: 38373236 DOI: 10.1021/acs.est.3c09171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Anthropogenic organohalide pollutants pose a severe threat to public health and ecosystems. In situ bioremediation using organohalide respiring bacteria (OHRB) offers an environmentally friendly and cost-efficient strategy for decontaminating organohalide-polluted sites. The genomic structures of many OHRB suggest that dehalogenation traits can be horizontally transferred among microbial populations, but their occurrence among anaerobic OHRB has not yet been demonstrated experimentally. This study isolates and characterizes a novel tetrachloroethene (PCE)-dechlorinating Sulfurospirillum sp. strain SP, distinguishing itself among anaerobic OHRB by showcasing a mechanism essential for horizontal dissemination of reductive dehalogenation capabilities within microbial populations. Its genetic characterization identifies a unique plasmid (pSULSP), harboring reductive dehalogenase and de novo corrinoid biosynthesis operons, functions critical to organohalide respiration, flanked by mobile elements. The active mobility of these elements was demonstrated through genetic analyses of spontaneously emerging nondehalogenating variants of strain SP. More importantly, bioaugmentation of nondehalogenating microcosms with pSULSP DNA triggered anaerobic PCE dechlorination in taxonomically diverse bacterial populations. Our results directly support the hypothesis that exposure to anthropogenic organohalide pollutants can drive the emergence of dehalogenating microbial populations via horizontal gene transfer and demonstrate a mechanism by which genetic bioaugmentation for remediation of organohalide pollutants could be achieved in anaerobic environments.
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Affiliation(s)
- Siyan Zhao
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
| | - Matthew J Rogers
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
| | - Chang Ding
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research─UFZ, Permoserstraße, 15, Leipzig 04318, Germany
| | - Guofang Xu
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
| | - Jianzhong He
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
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Xie R, Gu Y, Li M, Li L, Yang Y, Sun Y, Zhou B, Liu T, Wang S, Liu W, Yang R, Su X, Zhong W, Wang B, Cao H. Desulfovibrio vulgaris interacts with novel gut epithelial immune receptor LRRC19 and exacerbates colitis. MICROBIOME 2024; 12:4. [PMID: 38172943 PMCID: PMC10763354 DOI: 10.1186/s40168-023-01722-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 11/15/2023] [Indexed: 01/05/2024]
Abstract
BACKGROUND The overgrowth of Desulfovibrio, an inflammation promoting flagellated bacteria, has been found in ulcerative colitis (UC) patients. However, the molecular mechanism in promoting colitis remains unestablished. METHODS The relative abundance Desulfovibrio vulgaris (D. vulgaris) in stool samples of UC patients was detected. Mice were treated with dextran sulfate sodium to induce colitis with or without administration of D. vulgaris or D. vulgaris flagellin (DVF), and the severity of colitis and the leucine-rich repeat containing 19 (LRRC19) signaling were assessed. The interaction between DVF and LRRC19 was identified by surface plasmon resonance and intestinal organoid culture. Lrrc19-/- and Tlr5-/- mice were used to investigate the indispensable role of LRRC19. Finally, the blockade of DVF-LRRC19 interaction was selected through virtual screening and the efficacy in colitis was assessed. RESULTS D. vulgaris was enriched in fecal samples of UC patients and was correlated with the disease severity. D. vulgaris or DVF treatment significantly exacerbated colitis in germ-free mice and conventional mice. Mechanistically, DVF could interact with LRRC19 (rather than TLR5) in colitis mice and organoids, and then induce the production of pro-inflammatory cytokines. Lrrc19 knockdown blunted the severity of colitis. Furthermore, typhaneoside, a blockade of binding interfaces, blocked DVF-LRRC19 interaction and dramatically ameliorated DVF-induced colitis. CONCLUSIONS D. vulgaris could promote colitis through DVF-LRRC19 interaction. Targeting DVF-LRRC19 interaction might be a new therapeutic strategy for UC therapy. Video Abstract.
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Affiliation(s)
- Runxiang Xie
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Yu Gu
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Mengfan Li
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Lingfeng Li
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Yunwei Yang
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Yue Sun
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Bingqian Zhou
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Tianyu Liu
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Sinan Wang
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Wentian Liu
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Rongcun Yang
- Department of Immunology, Nankai University School of Medicine, Nankai University, Tianjin, China
| | - Xiaomin Su
- Department of Immunology, Nankai University School of Medicine, Nankai University, Tianjin, China.
| | - Weilong Zhong
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China.
| | - Bangmao Wang
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China.
| | - Hailong Cao
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China.
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Xie LW, Cai S, Lu HY, Tang FL, Zhu RQ, Tian Y, Li M. Microbiota-derived I3A protects the intestine against radiation injury by activating AhR/IL-10/Wnt signaling and enhancing the abundance of probiotics. Gut Microbes 2024; 16:2347722. [PMID: 38706205 PMCID: PMC11086037 DOI: 10.1080/19490976.2024.2347722] [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: 10/01/2023] [Accepted: 04/22/2024] [Indexed: 05/07/2024] Open
Abstract
The intestine is prone to radiation damage in patients undergoing radiotherapy for pelvic tumors. However, there are currently no effective drugs available for the prevention or treatment of radiation-induced enteropathy (RIE). In this study, we aimed at investigating the impact of indole-3-carboxaldehyde (I3A) derived from the intestinal microbiota on RIE. Intestinal organoids were isolated and cultivated for screening radioprotective tryptophan metabolites. A RIE model was established using 13 Gy whole-abdominal irradiation in male C57BL/6J mice. After oral administration of I3A, its radioprotective ability was assessed through the observation of survival rates, clinical scores, and pathological analysis. Intestinal stem cell survival and changes in the intestinal barrier were observed through immunofluorescence and immunohistochemistry. Subsequently, the radioprotective mechanisms of I3A was investigated through 16S rRNA and transcriptome sequencing, respectively. Finally, human colon cancer cells and organoids were cultured to assess the influence of I3A on tumor radiotherapy. I3A exhibited the most potent radioprotective effect on intestinal organoids. Oral administration of I3A treatment significantly increased the survival rate in irradiated mice, improved clinical and histological scores, mitigated mucosal damage, enhanced the proliferation and differentiation of Lgr5+ intestinal stem cells, and maintained intestinal barrier integrity. Furthermore, I3A enhanced the abundance of probiotics, and activated the AhR/IL-10/Wnt signaling pathway to promote intestinal epithelial proliferation. As a crucial tryptophan metabolite, I3A promotes intestinal epithelial cell proliferation through the AhR/IL-10/Wnt signaling pathway and upregulates the abundance of probiotics to treat RIE. Microbiota-derived I3A demonstrates potential clinical application value for the treatment of RIE.
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Affiliation(s)
- Li-Wei Xie
- Suzhou Key Laboratory for Radiation Oncology, Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Shang Cai
- Suzhou Key Laboratory for Radiation Oncology, Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Hai-Yan Lu
- Suzhou Key Laboratory for Radiation Oncology, Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Feng-Ling Tang
- Suzhou Key Laboratory for Radiation Oncology, Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Rui-Qiu Zhu
- Suzhou Key Laboratory for Radiation Oncology, Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Ye Tian
- Suzhou Key Laboratory for Radiation Oncology, Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Ming Li
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
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Chen C, Xu G, He J. Substrate-dependent strategies to mitigate sulfate inhibition on microbial reductive dechlorination of polychlorinated biphenyls. CHEMOSPHERE 2023; 342:140063. [PMID: 37673179 DOI: 10.1016/j.chemosphere.2023.140063] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 08/30/2023] [Accepted: 09/02/2023] [Indexed: 09/08/2023]
Abstract
Sulfate widely co-exists with polychlorinated biphenyls (PCBs) at various concentrations in the subsurface environment. Previous studies have suggested that sulfate often hampers microbial degradation of aliphatic chlorinated solvents such as chloroethenes. However, the impact of sulfate on microbial reductive dechlorination of aromatic PCBs and the underlying mechanisms have received limited attention. Likewise, strategies to mitigate such inhibition remain scarce. Here we found that the mechanisms and mitigation strategies of sulfate inhibition on PCB dechlorination were substrate-dependent. Under electron donor-limiting conditions, even a low concentration of sulfate (2 mM) resulted in a decreased PCB dechlorination rate by 88.7% in a co-culture comprising Dehalococcoides mccartyi CG1 and the sulfate-reducing bacterium Desulfovibrio desulfuricans F1, an inhibition which was attributed to the competition for electron donor between sulfate reduction and PCB dechlorination. As expected, re-amendment of 5 mM lactate effectively re-initiated PCB dechlorination. However, in the presence of a higher concentration of sulfate (5 mM), the PCB dechlorination rate in the co-culture was 77.7% lower than in the control, even with excessive electron donor supply. This inhibition was linked to high concentration of sulfide (∼5 mM) produced from sulfate reduction, as suggested by high availability of electron donor, recovery of dechlorination activity after removal of sulfide, and negligible influence of sulfate on PCB dechlorination in the axenic culture of D. mccartyi CG1. Indeed, sulfide (>5 mM) was found to directly suppress expression of PCB-dechlorinating reductive dehalogenase gene. The highest transcriptional level of pcbA1 was 2.9 ± 0.3 transcripts·cell-1 in the presence of ∼5 mM sulfide, which was increased to 37.4 ± 5.0 transcripts·cell-1 when sulfide was removed. Under this scenario, introduction of ferrous salts (5 mM) efficiently alleviated sulfide inhibition on PCB dechlorination. Interestingly, the augmentation of methanogens in the co-culture was also effective in mitigating sulfide inhibition on PCB dechlorination, offering a new approach to protect Dehalococcoides under sulfide stress. Collectively, these findings deepen our understanding of the influence of sulfate on microbial reductive dechlorination of PCBs and contribute to developing appropriate strategies based on geochemical conditions to alleviate sulfate inhibition during bioremediation of PCB-contaminated sites.
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Affiliation(s)
- Chen Chen
- Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore
| | - Guofang Xu
- Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore
| | - Jianzhong He
- Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore.
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Khan MT, Dwibedi C, Sundh D, Pradhan M, Kraft JD, Caesar R, Tremaroli V, Lorentzon M, Bäckhed F. Synergy and oxygen adaptation for development of next-generation probiotics. Nature 2023; 620:381-385. [PMID: 37532933 PMCID: PMC10412450 DOI: 10.1038/s41586-023-06378-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 06/27/2023] [Indexed: 08/04/2023]
Abstract
The human gut microbiota has gained interest as an environmental factor that may contribute to health or disease1. The development of next-generation probiotics is a promising strategy to modulate the gut microbiota and improve human health; however, several key candidate next-generation probiotics are strictly anaerobic2 and may require synergy with other bacteria for optimal growth. Faecalibacterium prausnitzii is a highly prevalent and abundant human gut bacterium associated with human health, but it has not yet been developed into probiotic formulations2. Here we describe the co-isolation of F. prausnitzii and Desulfovibrio piger, a sulfate-reducing bacterium, and their cross-feeding for growth and butyrate production. To produce a next-generation probiotic formulation, we adapted F. prausnitzii to tolerate oxygen exposure, and, in proof-of-concept studies, we demonstrate that the symbiotic product is tolerated by mice and humans (ClinicalTrials.gov identifier: NCT03728868 ) and is detected in the human gut in a subset of study participants. Our study describes a technology for the production of next-generation probiotics based on the adaptation of strictly anaerobic bacteria to tolerate oxygen exposures without a reduction in potential beneficial properties. Our technology may be used for the development of other strictly anaerobic strains as next-generation probiotics.
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Affiliation(s)
- Muhammad Tanweer Khan
- Wallenberg Laboratory, Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
- Metabogen, Mölndal, Sweden
| | - Chinmay Dwibedi
- Wallenberg Laboratory, Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
- Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
| | - Daniel Sundh
- Sahlgrenska Osteoporosis Centre, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Meenakshi Pradhan
- Wallenberg Laboratory, Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Jamie D Kraft
- Wallenberg Laboratory, Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Robert Caesar
- Wallenberg Laboratory, Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Valentina Tremaroli
- Wallenberg Laboratory, Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Mattias Lorentzon
- Sahlgrenska Osteoporosis Centre, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
- Region Västra Götaland, Geriatric Medicine Clinic, Sahlgrenska University Hospital Mölndal, Mölndal, Sweden
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria, Australia
| | - Fredrik Bäckhed
- Wallenberg Laboratory, Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden.
- Department of Clinical Physiology, Sahlgrenska University Hospital, Gothenburg, Sweden.
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark.
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Wang S, Lu Q, Liang Z, Yu X, Lin M, Mai B, Qiu R, Shu W, He Z, Wall JD. Generation of zero-valent sulfur from dissimilatory sulfate reduction in sulfate-reducing microorganisms. Proc Natl Acad Sci U S A 2023; 120:e2220725120. [PMID: 37155857 PMCID: PMC10194018 DOI: 10.1073/pnas.2220725120] [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] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 04/14/2023] [Indexed: 05/10/2023] Open
Abstract
Dissimilatory sulfate reduction (DSR) mediated by sulfate-reducing microorganisms (SRMs) plays a pivotal role in global sulfur, carbon, oxygen, and iron cycles since at least 3.5 billion y ago. The canonical DSR pathway is believed to be sulfate reduction to sulfide. Herein, we report a DSR pathway in phylogenetically diverse SRMs through which zero-valent sulfur (ZVS) is directly generated. We identified that approximately 9% of sulfate reduction was directed toward ZVS with S8 as a predominant product, and the ratio of sulfate-to-ZVS could be changed with SRMs' growth conditions, particularly the medium salinity. Further coculturing experiments and metadata analyses revealed that DSR-derived ZVS supported the growth of various ZVS-metabolizing microorganisms, highlighting this pathway as an essential component of the sulfur biogeochemical cycle.
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Affiliation(s)
- Shanquan Wang
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou510006, China
| | - Qihong Lu
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou510006, China
| | - Zhiwei Liang
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou510006, China
| | - Xiaoxiao Yu
- State Key Laboratory of Isotope Geochemistry and CAS Center for Excellence in Deep Earth Science, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou510640, China
- Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou511458, China
- University of Chinese Academy of Sciences, Beijing100039, China
| | - Mang Lin
- State Key Laboratory of Isotope Geochemistry and CAS Center for Excellence in Deep Earth Science, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou510640, China
- Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou511458, China
- University of Chinese Academy of Sciences, Beijing100039, China
| | - Bixian Mai
- State Key Laboratory of Isotope Geochemistry and CAS Center for Excellence in Deep Earth Science, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou510640, China
- University of Chinese Academy of Sciences, Beijing100039, China
| | - Rongliang Qiu
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Natural Resources and Environment, South China Agricultural University, Guangzhou510642, China
| | - Wensheng Shu
- Institute of Ecological Science, School of Life Sciences, South China Normal University, Guangzhou510631, China
| | - Zhili He
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou510006, China
| | - Judy D. Wall
- Department of Biochemistry, University of Missouri-Columbia, Columbia, MO65211
- Department of Molecular Microbiology & Immunology, University of Missouri-Columbia, Columbia, MO65211
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Gopalakrishnan U, Murthy RT, Felicita AS, Alshehri A, Awadh W, Almalki A, Vinothkumar TS, Baeshen HA, Bhandi S, Kathir A, Samala A, Raj AT, Heboyan A, Patil S. Sulfate-Reducing Bacteria in Patients Undergoing Fixed Orthodontic Treatment. Int Dent J 2023; 73:274-279. [PMID: 36180285 PMCID: PMC10023577 DOI: 10.1016/j.identj.2022.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 07/17/2022] [Accepted: 07/18/2022] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES The oral microbiological environment may be implicated in the corrosion of orthodontic metals. This study aimed to examine the prevalence of sulfate-reducing bacteria (SRB) in orthodontic patients undergoing fixed appliance treatment. METHODS Sixty-nine orthodontic and 69 healthy non-orthodontic participants were enrolled in the study. Supragingival and subgingivaloral biofilm were collected and tested for the presence of SRB. The DNA extraction, polymerase chain reaction (PCR), and 16sRNA Sanger sequencing method was performed from the SRB-positive samples. The sequenced PCR products were analysed and compared with databases to identify the bacterial genus. RESULTS Amongst 69 orthodontic patients, characteristic black precipitates developed in 14, indicating the presence of iron sulfides which demonstrates the likelihood of SRB. Alternatively, 2 out of 69 showed the presence of SRB in healthy non-orthodontic participants (controls). Desulfovibrio spp was confirmed by analyses of 16sRNA sequencing, which revealed that the SRB prevalence was 20% in the examined participants with orthodontic appliances. CONCLUSIONS The prevalence of SRB was found to be significantly higher amongst orthodontic patients compared to non-orthodontic participants. Presence of stainless steel in the oral environment may have facilitated the colonisation of SRB.
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Affiliation(s)
| | | | - A Sumathi Felicita
- Department of Orthodontics, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
| | - Abdulrahman Alshehri
- Department of Preventive Dental Sciences, Division of Orthodontics, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Wael Awadh
- Department of Preventive Dental Sciences, Division of Orthodontics, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Abdullah Almalki
- Department of Preventive Dental Sciences, College of Dentistry, Majmaah University, AL-Majmaah, Saudi Arabia
| | - Thilla Sekar Vinothkumar
- Department of Restorative Dental Sciences, Division of Operative Dentistry, College of Dentistry, Jazan University, Jazan, Saudi Arabia; Department of Conservative Dentistry and Endodontics, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Chennai, India
| | - Hosam Ali Baeshen
- Department of Orthodontics, College of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Shilpa Bhandi
- Department of Cariology, Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India; College of Dental Medicine, Roseman University of Health Sciences, South Jordan, Utah-84095, USA
| | - Arvind Kathir
- Department of Orthodontics, Sri Venkateswara Dental College and Hospital, Chennai, India
| | - Abhinaya Samala
- Department of Orthodontics, Sri Venkateswara Dental College and Hospital, Chennai, India
| | - A Thirumal Raj
- Department of Oral Pathology and Microbiology, Sri Venkateswara Dental College and Hospital, Chennai, India
| | - Artak Heboyan
- Department of Prosthodontics, Faculty of Stomatology, Yerevan State Medical University After MkhitarHeratsi, Yerevan, Armenia
| | - Shankargouda Patil
- College of Dental Medicine, Roseman University of Health Sciences, South Jordan, Utah, USA; Centre of Molecular Medicine and Diagnostics (COMManD), Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
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Karnachuk OV, Beletsky AV, Rakitin AL, Ikkert OP, Avakyan MR, Zyusman VS, Napilov A, Mardanov AV, Ravin NV. Antibiotic-Resistant Desulfovibrio Produces H2S from Supplements for Animal Farming. Microorganisms 2023; 11:microorganisms11040838. [PMID: 37110261 PMCID: PMC10146906 DOI: 10.3390/microorganisms11040838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 03/14/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023] Open
Abstract
Sulphate-reducing bacteria, primarily Desulfovibrio, are responsible for the active generation of H2S in swine production waste. The model species for sulphate reduction studies, Desulfovibrio vulgaris strain L2, was previously isolated from swine manure characterized by high rates of dissimilatory sulphate reduction. The source of electron acceptors in low-sulphate swine waste for the high rate of H2S formation remains uncertain. Here, we demonstrate the ability of the L2 strain to use common animal farming supplements including L-lysine-sulphate, gypsum and gypsum plasterboards as electron acceptors for H2S production. Genome sequencing of strain L2 revealed the presence of two megaplasmids and predicted resistance to various antimicrobials and mercury, which was confirmed in physiological experiments. Most of antibiotic resistance genes (ARG) are carried by two class 1 integrons located on the chromosome and on the plasmid pDsulf-L2-2. These ARGs, predicted to confer resistance to beta-lactams, aminoglycosides, lincosamides, sulphonamides, chloramphenicol and tetracycline, were probably laterally acquired from various Gammaproteobacteria and Firmicutes. Resistance to mercury is likely enabled by two mer operons also located on the chromosome and on pDsulf-L2-2 and acquired via horizontal gene transfer. The second megaplasmid, pDsulf-L2-1, encoded nitrogenase, catalase and type III secretion system suggesting close contact of the strain with intestinal cells in the swine gut. The location of ARGs on mobile elements allows us to consider D. vulgaris strain L2 as a possible vector transferring antimicrobials resistance determinants between the gut microbiote and microbial communities in environmental biotopes.
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Alterations in Gut Microbiota Profiles of Mice Infected with Echinococcus granulosus sensu lato Microbiota Profiles of Mice Infected with E. granulosus s.l. Acta Parasitol 2022; 67:1594-1602. [PMID: 36048399 DOI: 10.1007/s11686-022-00613-6] [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: 02/18/2022] [Accepted: 08/17/2022] [Indexed: 11/01/2022]
Abstract
OBJECTIVE Cystic echinococcosis is a kind of parasitic disease that seriously endangers human and animal health. At present, its prevention and treatment still do not achieve the desired results. The aims of this study were to explore the effect of CE on intestinal microflora in mice. METHODS In this study, 16S rRNA metagenome sequencing and bioinformatics were used to analyze the intestinal flora of mice infected with E. granulosus s.l. Changes in intestinal microbial community abundance were investigated and the differences in microbial populations of mice infected with E. granulosus s.l. were screened. RESULTS Our results show that at the phylum level, nine abundant taxa were identified, the relative abundance of Firmicutes and Proteobacteria were enriched in infected mice, whereas Bacteroidetes and Patescibacteria were enriched in control mice (P < 0.01). At the class level, 13 abundant taxa were identified, the relative abundance of Bacilli was enriched in control mice, but decreased in infected mice (P < 0.01). At the order level, 15 abundant taxa were identified, the relative abundance of Lactobacillales was enriched in control mice, but decreased in infected mice (P < 0.01). At the family level, 28 abundant taxa were identified, enriched bacteria in the infected mice was Streptococcaceae, while the enriched bacteria in the control group was Lactobacillaceae (P < 0.01). At the genus level, 79 abundant taxa were identified, enriched bacteria in the infected mice was Streptococcus, while the enriched bacteria in the control group was uncultured_bacterium_f_Eggerthellaceae (P < 0.01). At the species level, 80 abundant taxa were identified, enriched bacteria in the infected mice was uncultured_bacterium_g_Streptococcus, while the enriched bacteria in the control group was uncultured_bacterium_f_Eggerthellaceae (P < 0.01). 39 KEGG pathways were identified that were differentially enriched between the infected and control mice. CONCLUSION This study comprehensively demonstrates the differential intestinal microbiota of infected mice and analyzes the metabolic pathways related to the specific microbiota. This could provide new targets and research direction for the treatment and prevention of diseases caused by E. granulosus s.l.
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Pham VT, Greppi A, Chassard C, Braegger C, Lacroix C. Stepwise establishment of functional microbial groups in the infant gut between 6 months and 2 years: A prospective cohort study. Front Nutr 2022; 9:948131. [PMID: 35967780 PMCID: PMC9366138 DOI: 10.3389/fnut.2022.948131] [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: 05/19/2022] [Accepted: 06/16/2022] [Indexed: 11/13/2022] Open
Abstract
The early intestinal colonization of functional microbial groups plays an essential role in infant gut health, with most studies targeting the initial colonization period from birth to 6 months of age. In a previous report, we demonstrated the metabolic cross-feeding of lactate and identified keystone species specified for lactate utilization in fecal samples of 40 healthy infants. We present here the extension of our longitudinal study for the period from 6 months to 2 years, with a focus on the colonization of functional groups involved in lactate metabolism and butyrate production. We captured the dynamic changes of the gut microbiota and reported a switch in the predominant lactate-producing and lactate-utilizing bacteria, from Veillonella producing propionate in the first year to Anaerobutyrycum hallii producing butyrate in the second year of life. The significant increase in butyrate producers and fecal butyrate concentration was also pinpointed to the weaning period between 6 and 10 months. Correlation analyses further suggested, for the first time, the metabolic cross-feeding of hydrogen in infants. In conclusion, our longitudinal study of 40 Swiss infants provides important insights into the colonization of functional groups involved in lactate metabolism and butyrate production in the first 2 years of life.
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Affiliation(s)
- Van T Pham
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland.,Division of Gastroenterology and Nutrition, University Children's Hospital Zurich, Zurich, Switzerland
| | - Anna Greppi
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Christophe Chassard
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
| | - Christian Braegger
- Division of Gastroenterology and Nutrition, University Children's Hospital Zurich, Zurich, Switzerland
| | - Christophe Lacroix
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, Zurich, Switzerland
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12
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Teigen L, Mathai PP, Lopez S, Matson M, Elkin B, Kozysa D, Kabage AJ, Hamilton M, Vaughn BP, Sadowsky MJ, Khoruts A. Differential hydrogen sulfide production by a human cohort in response to animal- and plant-based diet interventions. Clin Nutr 2022; 41:1153-1162. [PMID: 35500315 PMCID: PMC11082741 DOI: 10.1016/j.clnu.2022.03.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 03/24/2022] [Accepted: 03/30/2022] [Indexed: 02/06/2023]
Abstract
BACKGROUND Hydrogen sulfide (H2S) is a toxic end-product of microbial fermentation produced in the colon that may play a role in the pathogenesis of several diseases, including ulcerative colitis and colon cancer. However, the effect of diet interventions on intestinal burden of H2S gas exposure remains poorly understood. OBJECTIVE Determine the effect of short-term (1-week) plant- and animal-based eating patterns on ex vivo fecal H2S production in healthy human volunteers. METHODS The study design was an open-label, cross-over diet study and diets were self-administered. Each participant consumed two interventional diets: 1) an animal-based, low fiber (i.e. western) diet and 2) a plant-based, high fiber diet, separated by a two-week washout period. Participants collected full stool samples at the end of each week, which were processed within 2 h of collection to capture H2S production. Microfluidic qPCR (MFQPCR) was used to simultaneously quantify multiple taxonomic and functional groups involved in sulfate reduction and the fecal microbiota was characterized through high-throughput DNA sequencing. RESULTS Median H2S production was higher following the animal-based diet compared to the plant-based diet (p = 0.02; median difference 29 ppm/g, 95% CI 16-97). However, there was substantial individual variability and 2 of 11 individuals (18%) produced more H2S on the plant-based diet. Using the top and bottom quartiles of H2S percent change between animal- and plant-based diet weeks to define responders and non-responders, significant taxonomic differences were observed between the responder and non-responder cohorts. CONCLUSIONS Here we report that substrate changes associated with a 1-week plant-based diet intervention resulted in lower ex vivo H2S production compared to a 1-week animal-based diet intervention in most healthy individuals. However, H2S responsiveness to diet was not uniform across the entire cohort, and potential H2S production enterotypes were characterized that may predict individualized H2S responsiveness to diet.
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Affiliation(s)
- Levi Teigen
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Prince P Mathai
- BioTechnology Institute, University of Minnesota, St. Paul, MN, USA
| | - Sharon Lopez
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Michael Matson
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Baila Elkin
- Medical School, University of Minnesota, Minneapolis, MN, USA
| | - Daria Kozysa
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Amanda J Kabage
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Matthew Hamilton
- BioTechnology Institute, University of Minnesota, St. Paul, MN, USA
| | - Byron P Vaughn
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Michael J Sadowsky
- BioTechnology Institute, University of Minnesota, St. Paul, MN, USA; Department of Soil, Water, and Climate, USA; Department of Plant and Microbial Biology, USA
| | - Alexander Khoruts
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, University of Minnesota, Minneapolis, MN, USA; BioTechnology Institute, University of Minnesota, St. Paul, MN, USA; Center for Immunology, University of Minnesota, Minneapolis, MN, USA.
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Wolf PG, Cowley ES, Breister A, Matatov S, Lucio L, Polak P, Ridlon JM, Gaskins HR, Anantharaman K. Diversity and distribution of sulfur metabolic genes in the human gut microbiome and their association with colorectal cancer. MICROBIOME 2022; 10:64. [PMID: 35440042 PMCID: PMC9016944 DOI: 10.1186/s40168-022-01242-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 02/01/2022] [Indexed: 05/05/2023]
Abstract
BACKGROUND Recent evidence implicates microbial sulfidogenesis as a potential trigger of colorectal cancer (CRC), highlighting the need for comprehensive knowledge of sulfur metabolism within the human gut. Microbial sulfidogenesis produces genotoxic hydrogen sulfide (H2S) in the human colon using inorganic (sulfate) and organic (taurine/cysteine/methionine) substrates; however, the majority of studies have focused on sulfate reduction using dissimilatory sulfite reductases (Dsr). RESULTS Here, we show that genes for microbial sulfur metabolism are more abundant and diverse than previously observed and are statistically associated with CRC. Using ~ 17,000 bacterial genomes from publicly available stool metagenomes, we studied the diversity of sulfur metabolic genes in 667 participants across different health statuses: healthy, adenoma, and carcinoma. Sulfidogenic genes were harbored by 142 bacterial genera and both organic and inorganic sulfidogenic genes were associated with carcinoma. Significantly, the anaerobic sulfite reductase (asr) genes were twice as abundant as dsr, demonstrating that Asr is likely a more important contributor to sulfate reduction in the human gut than Dsr. We identified twelve potential pathways for reductive taurine metabolism and discovered novel genera harboring these pathways. Finally, the prevalence of metabolic genes for organic sulfur indicates that these understudied substrates may be the most abundant source of microbially derived H2S. CONCLUSIONS Our findings significantly expand knowledge of microbial sulfur metabolism in the human gut. We show that genes for microbial sulfur metabolism in the human gut are more prevalent than previously known, irrespective of health status (i.e., in both healthy and diseased states). Our results significantly increase the diversity of pathways and bacteria that are associated with microbial sulfur metabolism in the human gut. Overall, our results have implications for understanding the role of the human gut microbiome and its potential contributions to the pathogenesis of CRC. Video abstract.
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Affiliation(s)
- Patricia G Wolf
- Institute for Health Research and Policy, University of Illinois at Chicago, Chicago, IL, USA
- University of Illinois Cancer Center, University of Illinois at Chicago, Chicago, IL, USA
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Elise S Cowley
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, USA
- Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, WI, USA
| | - Adam Breister
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, USA
| | - Sarah Matatov
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Luke Lucio
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Paige Polak
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Jason M Ridlon
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois Urbana-Champaign, Urbana, IL, USA
- Cancer Center at Illinois, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - H Rex Gaskins
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Carl R. Woese Institute for Genomic Biology, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Cancer Center at Illinois, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Department of Biomedical and Translational Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA.
- Department of Pathobiology, University of Illinois Urbana-Champaign, Urbana, IL, USA.
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Wang QJ, Guo Y, Zhang KH, Zhang L, Geng SX, Shan CH, Liu P, Zhu MQ, Jin QY, Liu ZY, Wang MZ, Li MY, Liu M, An L, Tian JH, Wu ZH. Night-Restricted Feeding Improves Gut Health by Synchronizing Microbe-Driven Serotonin Rhythm and Eating Activity-Driven Body Temperature Oscillations in Growing Rabbits. Front Cell Infect Microbiol 2022; 11:771088. [PMID: 34976857 PMCID: PMC8718905 DOI: 10.3389/fcimb.2021.771088] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 12/02/2021] [Indexed: 01/04/2023] Open
Abstract
The circadian misalignment of the gut microbiota caused by unusual eating times in adult animals is related to disease development. However, whether the composition and diurnal rhythm of gut microbiota can be optimized by synchronizing the window period of eating with natural eating habits to reduce the risk of diarrhea remains unclear, especially in growing animals. In this study, 108 5-week-old weaned rabbits (nocturnal animals) were randomly subjected to daytime feeding (DF) and night-restricted feeding (NRF). At age 12 weeks, six rabbits were selected from each group, and caecum and cecal contents, as well as serum samples were collected at 4-h intervals during 24 h. Overall, NRF was found to reduce the risk of diarrhea in growing rabbits, improved the diurnal rhythm and abundance of beneficial microorganisms, along with the production of beneficial metabolites, whereas reduced the abundance of potential pathogens (Synergistes, Desulfovibrio, and Alistipes). Moreover, NRF improved diurnal rhythm of tryptophan hydroxylase isoform 1 and serotonin. Furthermore, NRF strengthened the diurnal amplitude of body core temperature, and promoted the diurnal expression of intestinal clock genes (BMAL1, CLOCK, REV-ERBα, and PER1), and genes related to the regulation of the intestinal barrier (CLAUDIN-1), and intestinal epithelial cell self-proliferation and renewal (BMI1). In vitro simulation experiments further revealed that synchronization of microbial-driven serotonin rhythm and eating activity-driven body temperature oscillations, which are important zeitgebers, could promote the diurnal expression of clock genes and CLAUDIN-1 in rabbit intestinal epithelial cells (RIEC), and enhance RIEC proliferation. This is the first study to reveal that NRF reprograms the diurnal rhythm of the gut microbiome, promotes the diurnal expression of clock genes and tight junction genes via synchronization of microbial-driven serotonin rhythm and eating activity-driven body temperature oscillations, thereby improving intestinal health and reducing the risk of diarrhea in growing rabbits. Collectively, these results provide a new perspective for the healthy feeding and management of growing animals.
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Affiliation(s)
- Qiang-Jun Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yao Guo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Ke-Hao Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Lei Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shi-Xia Geng
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Chun-Hua Shan
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Peng Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Meng-Qi Zhu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Qiong-Yu Jin
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhong-Ying Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Mei-Zhi Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Ming-Yong Li
- National Rabbit Industry Technology System Qingdao Comprehensive Experimental Station, Qingdao, China
| | - Man Liu
- National Rabbit Industry Technology System Qingdao Comprehensive Experimental Station, Qingdao, China
| | - Lei An
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Jian-Hui Tian
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhong-Hong Wu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Zhang X, Monnoye M, Mariadassou M, Beguet-Crespel F, Lapaque N, Heberden C, Douard V. Glucose but Not Fructose Alters the Intestinal Paracellular Permeability in Association With Gut Inflammation and Dysbiosis in Mice. Front Immunol 2021; 12:742584. [PMID: 35024040 PMCID: PMC8744209 DOI: 10.3389/fimmu.2021.742584] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 10/11/2021] [Indexed: 01/14/2023] Open
Abstract
A causal correlation between the metabolic disorders associated with sugar intake and disruption of the gastrointestinal (GI) homeostasis has been suggested, but the underlying mechanisms remain unclear. To unravel these mechanisms, we investigated the effect of physiological amounts of fructose and glucose on barrier functions and inflammatory status in various regions of the GI tract and on the cecal microbiota composition. C57BL/6 mice were fed chow diet and given 15% glucose or 15% fructose in drinking water for 9 weeks. We monitored caloric intake, body weight, glucose intolerance, and adiposity. The intestinal paracellular permeability, cytokine, and tight junction protein expression were assessed in the jejunum, cecum, and colon. In the cecum, the microbiota composition was determined. Glucose-fed mice developed a marked increase in total adiposity, glucose intolerance, and paracellular permeability in the jejunum and cecum while fructose absorption did not affect any of these parameters. Fructose-fed mice displayed increased circulation levels of IL6. In the cecum, both glucose and fructose intake were associated with an increase in Il13, Ifnγ, and Tnfα mRNA and MLCK protein levels. To clarify the relationships between monosaccharides and barrier function, we measured the permeability of Caco-2 cell monolayers in response to IFNγ+TNFα in the presence of glucose or fructose. In vitro, IFNγ+TNFα-induced intestinal permeability increase was less pronounced in response to fructose than glucose. Mice treated with glucose showed an enrichment of Lachnospiracae and Desulfovibrionaceae while the fructose increased relative abundance of Lactobacillaceae. Correlations between pro-inflammatory cytokine gene expression and bacterial abundance highlighted the potential role of members of Desulfovibrio and Lachnospiraceae NK4A136 group genera in the inflammation observed in response to glucose intake. The increase in intestinal inflammation and circulating levels of IL6 in response to fructose was observed in the absence of intestinal permeability modification, suggesting that the intestinal permeability alteration does not precede the onset of metabolic outcome (low-grade inflammation, hyperglycemia) associated with chronic fructose consumption. The data also highlight the deleterious effects of glucose on gut barrier function along the GI tract and suggest that Desulfovibrionaceae and Lachnospiraceae play a key role in the onset of GI inflammation in response to glucose.
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Affiliation(s)
- Xufei Zhang
- Université Paris-Saclay, INRAE, AgroParisTech, MICALIS Institute, Jouy-en-Josas, France
| | - Magali Monnoye
- Université Paris-Saclay, INRAE, AgroParisTech, MICALIS Institute, Jouy-en-Josas, France
| | | | | | - Nicolas Lapaque
- Université Paris-Saclay, INRAE, AgroParisTech, MICALIS Institute, Jouy-en-Josas, France
| | - Christine Heberden
- Université Paris-Saclay, INRAE, AgroParisTech, MICALIS Institute, Jouy-en-Josas, France
| | - Veronique Douard
- Université Paris-Saclay, INRAE, AgroParisTech, MICALIS Institute, Jouy-en-Josas, France
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Abstract
Colorectal cancer (CRC) is a significant public health problem accounting for about 10% of all new cancer cases globally. Though genetic and epigenetic factors influence CRC, the gut microbiota acts as a significant component of the disease's etiology. Further research is still needed to clarify the specific roles and identify more bacteria related to CRC development. This review aims to provide an overview of the "driver-passenger" model of CRC. The colonization and active invasion of the "driver(s)" bacteria cause damages allowing other commensals, known as "passengers," or their by-products, i.e., metabolites, to pass through the epithelium . This review will not only focus on the species of bacteria implicated in this model but also on their biological functions implicated in the occurrence of CRC, such as forming biofilms, mucus, penetration and production of enterotoxins and genotoxins.
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Affiliation(s)
- Marion Avril
- Department of Medicine, University of Washington, Seattle, WA, USA
| | - R. William DePaolo
- Department of Medicine, University of Washington, Seattle, WA, USA,Department of Medicine, Center for Microbiome Sciences & Therapeutics, University of Washington, Seattle, WA, USA,CONTACT R. William DePaolo Department of Medicine, University of Washington, 1959 NE Pacific Avenue, Seattle, WA98195, USA
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Distribution of Sulfate-Reducing Bacteria in the Environment: Cryopreservation Techniques and Their Potential Storage Application. Processes (Basel) 2021. [DOI: 10.3390/pr9101843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Sulfate-reducing bacteria (SRB) are a heterogeneous group of anaerobic microorganisms that play an important role in producing hydrogen sulfide not only in the natural environment, but also in the gastrointestinal tract and oral cavity of animals and humans. The present review was written with the inclusion of 110 references including the time period from 1951 to 2021. The following databases were evaluated: Web of Science, Scopus and Google Scholar. The articles chosen to be included in the review were written mainly in the English and Czech languages. The molecular mechanisms of microbial cryoprotection differ depending on the environment where microorganisms were initially isolated. It was observed that the viability of microorganisms after cryopreservation is dependent on a number of factors, primarily colony age, amount of inoculum, cell size or rate of cooling, and their molecular inventory. Therefore, this paper is devoted to assessing the performance and suitability of various cryopreservation methods of intestinal bacteria, including molecular mechanisms of their protection. In order to successfully complete the cryopreservation process, selecting the correct laboratory equipment and cryopreservation methodology is important. Our analysis revealed that SRB should be stored in glass vials to help mitigate the corrosive nature of hydrogen sulfide, which can affect their physiology on a molecular level. Furthermore, it is recommended that their storage be performed in distilled water or in a suspension with a low salt concentration. From a molecular biological and bioengineering perspective, this contribution emphasizes the need to consider the potential impact associated with SRB in the medical, construction, and environmental sectors.
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Effects of ShenLing BaiZhu San Supplementation on Gut Microbiota and Oxidative Stress in Rats with Ulcerative Colitis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:3960989. [PMID: 34630607 PMCID: PMC8500740 DOI: 10.1155/2021/3960989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 09/15/2021] [Indexed: 01/22/2023]
Abstract
The aim of this study was to evaluate the effect of gut microbiota and antioxidation of Shenling Baizhu San (SLBZS) as a supplement in a rat model of ulcerative colitis (UC) induced by 2,4,6-trinitrobenzenesulfonic acid (TNBS). Acute intestinal inflammation was induced in 40 male SD rats aged 4 weeks with 100 mg/kg TNBS, and then three dosages of SLBZS (0.5 g/kg, 1 g/kg, and 1.5 g/kg) were administered for eight days, respectively. Faecal microbiome composition was assessed by 16S rRNA high-throughput sequencing. The result indicated that SLBZS could reduce the diversity of gut microbiota and increased its abundance. At the genus level, the relative abundance of SCFAs producing bacteria including Prevotella and Oscillospira increased, while the relative abundance of opportunistic pathogens including Desulfovibrio and Bilophila decreased. Meanwhile, SLBZS could improve the lesions of colon and significantly reduce the level of MPO, increase the levels of SOD and CAT in rats' serum. These findings revealed that SLBZS was effective and possessed anticolitic activities in a rat model of UC by reducing macroscopical and microscopical colon injury, enhancing antioxidant capacity, and regulating gut microbiota.
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Zhang S, Yuan L, Li H, Han L, Jing W, Wu X, Ullah S, Liu R, Wu Y, Xu J. The Novel Interplay between Commensal Gut Bacteria and Metabolites in Diet-Induced Hyperlipidemic Rats Treated with Simvastatin. J Proteome Res 2021; 21:808-821. [PMID: 34365791 DOI: 10.1021/acs.jproteome.1c00252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Hyperlipidemia is one kind of metabolic syndrome for which the treatment commonly includes simvastatin (SV). Individuals vary widely in statin responses, and growing evidence implicates gut microbiome involvement in this variability. However, the associated molecular mechanisms between metabolic improvement and microbiota composition following SV treatment are still not fully understood. In this study, combinatory approaches using ultrahigh-performance liquid chromatography coupled with hybrid triple quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF MS/MS)-based metabolomic profiling, PCR-denaturing gradient gel electrophoresis (PCR-DGGE), quantitative PCR (qPCR), and 16S rRNA gene sequencing-based gut microbiota profiling were performed to investigate the interplay of endogenous metabolites and the gut microbiota related to SV treatment. A total of 6 key differential endogenous metabolites were identified that affect the metabolism of amino acids (phenylalanine and tyrosine), unsaturated fatty acids (linoleic acid and 9-hydroxyoctadecadienoic acid (9-HODE)), and the functions of gut microbial metabolism. Moreover, a total of 22 differentially abundant taxa were obtained following SV treatment. Three bacterial taxa were identified to be involved in SV treatment, namely, Bacteroidaceae, Prevotellaceae, and Porphyromonadaceae. These findings suggested that the phenylalanine and tyrosine-associated amino acid metabolism pathways, as well as the linoleic acid and 9-HODE-associated unsaturated fatty acid metabolism pathways, which are involved in gut flora interactions, might be potential therapeutic targets for improvement in SV hypolipidemic efficacy. The mass spectrometric data have been deposited to MassIVE (https://massive.ucsd.edu/ProteoSAFe/static/massive.jsp). Username: MSV000087842_reviewer. Password: hardworkingzsr.
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Affiliation(s)
- Siruo Zhang
- Department of Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, PR China.,Department of Clinical Laboratory, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, PR China
| | - Lu Yuan
- Department of Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, PR China
| | - Huan Li
- Department of Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, PR China
| | - Lei Han
- Department of Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, PR China
| | - Wanghui Jing
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, PR China
| | - Xiaokang Wu
- The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, PR China
| | - Shakir Ullah
- Department of Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, PR China
| | - Ruina Liu
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, PR China
| | - Yonghong Wu
- Department of Medical Technology, Xi'an Medical University, Xi'an, Shaanxi 710021, PR China
| | - Jiru Xu
- Department of Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, PR China
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Mitchell SC. Nutrition and sulfur. ADVANCES IN FOOD AND NUTRITION RESEARCH 2021; 96:123-174. [PMID: 34112351 DOI: 10.1016/bs.afnr.2021.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Sulfur is unusual in that it is a mineral that may be taken into the body in both inorganic and organic combinations. It has been available within the environment throughout the development of lifeforms and as such has become integrated into virtually every aspect of biochemical function. It is essential for the nature and maintenance of structure, assists in communication within the organism, is vital as a catalytic assistant in intermediary metabolism and the mechanism of energy flow as well as being involved in internal defense against potentially damaging reactive species and invading foreign chemicals. Recent studies have suggested extended roles for sulfur-containing molecules within living systems. As such, questions have been raised as to whether or not humans are receiving sufficient sulfur within their diet. Sulfur appears to have been the "poor relation" with regards to mineral nutrition. This may be because of difficulties encountered over its multifarious functions, the many chemical guises in which it may be ingested and its complex biochemical interconversions once taken into the body. No established daily requirements have been determined, unlike many minerals, although suggestions have been proposed. Owing to its widespread distribution within dietary components its intake has almost been taken for granted. In the majority of individuals partaking of a balanced diet the supply is deemed adequate, but those opting for specialized or restrictive diets may experience occasional and low-level shortages. In these instances, the careful use of sulfur supplements may be of benefit.
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Affiliation(s)
- Stephen C Mitchell
- Faculty of Medicine, Imperial College London, London, England, United Kingdom.
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21
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Murros KE, Huynh VA, Takala TM, Saris PEJ. Desulfovibrio Bacteria Are Associated With Parkinson's Disease. Front Cell Infect Microbiol 2021; 11:652617. [PMID: 34012926 PMCID: PMC8126658 DOI: 10.3389/fcimb.2021.652617] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 04/19/2021] [Indexed: 01/07/2023] Open
Abstract
Parkinson's disease (PD) is the most prevalent movement disorder known and predominantly affects the elderly. It is a progressive neurodegenerative disease wherein α-synuclein, a neuronal protein, aggregates to form toxic structures in nerve cells. The cause of Parkinson's disease (PD) remains unknown. Intestinal dysfunction and changes in the gut microbiota, common symptoms of PD, are evidently linked to the pathogenesis of PD. Although a multitude of studies have investigated microbial etiologies of PD, the microbial role in disease progression remains unclear. Here, we show that Gram-negative sulfate-reducing bacteria of the genus Desulfovibrio may play a potential role in the development of PD. Conventional and quantitative real-time PCR analysis of feces from twenty PD patients and twenty healthy controls revealed that all PD patients harbored Desulfovibrio bacteria in their gut microbiota and these bacteria were present at higher levels in PD patients than in healthy controls. Additionally, the concentration of Desulfovibrio species correlated with the severity of PD. Desulfovibrio bacteria produce hydrogen sulfide and lipopolysaccharide, and several strains synthesize magnetite, all of which likely induce the oligomerization and aggregation of α-synuclein protein. The substances originating from Desulfovibrio bacteria likely take part in pathogenesis of PD. These findings may open new avenues for the treatment of PD and the identification of people at risk for developing PD.
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Affiliation(s)
- Kari E. Murros
- Neurological Outpatient Clinic of Terveystalo Healthcare, Helsinki, Finland
| | - Vy A. Huynh
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
| | - Timo M. Takala
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
| | - Per E. J. Saris
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
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22
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Earley H, Lennon G, Coffey JC, Winter DC, O’Connell PR. Colonisation of the colonic mucus gel layer with butyrogenic and hydrogenotropic bacteria in health and ulcerative colitis. Sci Rep 2021; 11:7262. [PMID: 33790336 PMCID: PMC8012382 DOI: 10.1038/s41598-021-86166-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/18/2021] [Indexed: 02/01/2023] Open
Abstract
Butyrate is the primary energy source for colonocytes and is essential for mucosal integrity and repair. Butyrate deficiency as a result of colonic dysbiosis is a putative factor in ulcerative colitis (UC). Commensal microbes are butyrogenic, while others may inhibit butyrate, through hydrogenotropic activity. The aim of this study was to quantify butyrogenic and hydrogenotropic species and determine their relationship with inflammation within the colonic mucus gel layer (MGL). Mucosal brushings were obtained from 20 healthy controls (HC), 20 patients with active colitis (AC) and 14 with quiescent colitis (QUC). Abundance of each species was determined by RT-PCR. Inflammatory scores were available for each patient. Statistical analyses were performed using Mann-Whitney-U and Kruskall-Wallis tests. Butyrogenic R. hominis was more abundant in health than UC (p < 0.005), prior to normalisation against total bacteria. Hydrogenotropic B. wadsworthia was reduced in AC compared to HC and QUC (p < 0.005). An inverse correlation existed between inflammation and R. hominis (ρ - 0.460, p < 0.005) and B. wadsworthia (ρ - 0.646, p < 0.005). Other hydrogenotropic species did not widely colonise the MGL. These data support a role for butyrogenic bacteria in UC. Butyrate deficiency in UC may be related to reduced microbial production, rather than inhibition by microbial by-products.
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Affiliation(s)
- Helen Earley
- grid.7886.10000 0001 0768 2743School of Medicine and Medical Science, University College Dublin, Belfield, Dublin 4, Ireland ,grid.412751.40000 0001 0315 8143Centre for Colorectal Disease, St Vincent’s University Hospital, Dublin 4, Ireland
| | - Grainne Lennon
- grid.7886.10000 0001 0768 2743School of Medicine and Medical Science, University College Dublin, Belfield, Dublin 4, Ireland ,grid.412751.40000 0001 0315 8143Centre for Colorectal Disease, St Vincent’s University Hospital, Dublin 4, Ireland
| | | | - Desmond C. Winter
- grid.412751.40000 0001 0315 8143Centre for Colorectal Disease, St Vincent’s University Hospital, Dublin 4, Ireland
| | - P. Ronan O’Connell
- grid.7886.10000 0001 0768 2743School of Medicine and Medical Science, University College Dublin, Belfield, Dublin 4, Ireland ,grid.412751.40000 0001 0315 8143Centre for Colorectal Disease, St Vincent’s University Hospital, Dublin 4, Ireland
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23
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Gui DD, Luo W, Yan BJ, Ren Z, Tang ZH, Liu LS, Zhang JF, Jiang ZS. Effects of gut microbiota on atherosclerosis through hydrogen sulfide. Eur J Pharmacol 2021; 896:173916. [PMID: 33529724 DOI: 10.1016/j.ejphar.2021.173916] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 01/14/2021] [Accepted: 01/26/2021] [Indexed: 12/23/2022]
Abstract
Cardiovascular diseases are the leading cause of death and morbidity worldwide. Atherosclerotic cardiovascular disease (ASCVD) is affected by both environmental and genetic factors. Microenvironmental disorders of the human gut flora are associated with a variety of health problems, not only gastrointestinal diseases, such as inflammatory bowel disease, but also extralintestinal organs. Hydrogen sulfide (H2S) is the third gas signaling molecule other than nitric oxide and carbon monoxide. In the cardiovascular system, H2S plays important roles in the regulation of blood pressure, angiogenesis, smooth muscle cell proliferation and apoptosis, anti-oxidative stress, cardiac functions. This review is aiming to explore the potential role of gut microbiota in the development of atherosclerosis through hydrogen sulfide production as a novel therapeutic direction for atherosclerosis.
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Affiliation(s)
- Dan-Dan Gui
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, University of South China, Hengyang, 421001, China
| | - Wen Luo
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, University of South China, Hengyang, 421001, China
| | - Bin-Jie Yan
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, University of South China, Hengyang, 421001, China
| | - Zhong Ren
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, University of South China, Hengyang, 421001, China
| | - Zhi-Han Tang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, University of South China, Hengyang, 421001, China
| | - Lu-Shan Liu
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, University of South China, Hengyang, 421001, China
| | - Ji-Feng Zhang
- Cardiovascular Center, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Zhi-Sheng Jiang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, University of South China, Hengyang, 421001, China.
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24
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Intestinal bacteria are potential biomarkers and therapeutic targets for gastric cancer. Microb Pathog 2021; 151:104747. [PMID: 33484807 DOI: 10.1016/j.micpath.2021.104747] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 01/12/2021] [Accepted: 01/13/2021] [Indexed: 12/13/2022]
Abstract
The diagnostic and therapeutic role of intestinal microbiota in gastric carcinogenesis remains unclear. In this study, feces from gastric cancer patients and healthy people were sequenced for microbiota analysis, and the correlation between fecal bacteria and the occurrence of gastric cancer was explored. The β-diversity results showed that microbial compositions varied between gastric cancer patients and healthy people. Interestingly, the dissection of microbial structure revealed that all facultative anaerobic genera with relatively high abundances expanded significantly in gastric cancer patients. The succeeding correlation analysis demonstrated a distorted interaction of intestinal bacteria in gastric cancer. The application of some differential bacteria, Desulfovibrio, Escherichia, Faecalibacterium or Oscillospira, as biomarkers to predict gastric cancer could all reach an accuracy of 0.900 or above. The shift in Desulfovibrio was specifically verified by qPCR in newly collected fecal samples, and the patients with stage IV gastric cancer were identified to have significantly more Desulfovibrio than those with stage I, II and III gastric cancer. The possible role of Desulfovibrio in gastric cancer was assessed with H2S-treated HT-29 cells, and the results showed that H2S induced NO, IL-1β and IL-18 production, which is important for inflammation promotion and can be delivered through the bloodstream. This study suggests a correlation of intestinal microbiota and the development of gastric cancer.
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Environmental Impact of Sulfate-Reducing Bacteria, Their Role in Intestinal Bowel Diseases, and Possible Control by Bacteriophages. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11020735] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Sulfate-reducing bacteria (SRB) represent a group of prokaryotic microorganisms that are widely spread in the anoxic environment (seabed, riverbed and lakebed sediments, mud, intestinal tract of humans and animals, metal surfaces). SRB species also have an impact on processes occurring in the intestinal tract of humans and animals, including the connections between their presence and inflammatory bowel disease (IBD). Since these SRB can develop antimicrobial resistance toward the drugs, including antibiotics and antimicrobial agents, bacteriophages could represent an additional potential effective treatment. The main objectives of the review were as follows: (a) to review SRB (both from intestinal and environmental sources) regarding their role in intestinal diseases as well as their influence in environmental processes; and (b) to review, according to literature data, the influence of bacteriophages on SRB and their possible applications. Since SRB can have a significant adverse influence on industry as well as on humans and animals health, phage treatment of SRB can be seen as a possible effective method of SRB inhibition. However, there are relatively few studies concerning the influence of phages on SRB strains. Siphoviridae and Myoviridae families represent the main sulfide-producing bacteria phages. The most recent studies induced, by UV light, bacteriophages from Desulfovibrio vulgaris NCIMB 8303 and Desulfovibrio desulfuricans ATCC 13541. Notwithstanding costly and medically significant negative impacts of phages on SRB, they have been the subject of relatively few studies. The current search for alternatives to chemical biocides and antibiotics has led to the renewed interest in phages as antibacterial biocontrol and therapeutic agents, including their use against SRB. Hence, phages might represent a promising treatment against SRB in the future.
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Simplified Intestinal Microbiota to Study Microbe-Diet-Host Interactions in a Mouse Model. Cell Rep 2020; 26:3772-3783.e6. [PMID: 30917328 PMCID: PMC6444000 DOI: 10.1016/j.celrep.2019.02.090] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/22/2019] [Accepted: 02/21/2019] [Indexed: 12/16/2022] Open
Abstract
The gut microbiota can modulate human metabolism through interactions with macronutrients. However, microbiota-diet-host interactions are difficult to study because bacteria interact in complex food webs in concert with the host, and many of the bacteria are not yet characterized. To reduce the complexity, we colonize mice with a simplified intestinal microbiota (SIM) composed of ten sequenced strains isolated from the human gut with complementing pathways to metabolize dietary fibers. We feed the SIM mice one of three diets (chow [fiber rich], high-fat/high-sucrose, or zero-fat/high-sucrose diets [both low in fiber]) and investigate (1) how dietary fiber, saturated fat, and sucrose affect the abundance and transcriptome of the SIM community, (2) the effect of microbe-diet interactions on circulating metabolites, and (3) how microbiota-diet interactions affect host metabolism. Our SIM model can be used in future studies to help clarify how microbiota-diet interactions contribute to metabolic diseases.
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27
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Optimization for galactooligosaccharides synthesis: A potential alternative for gut health and immunity. Life Sci 2020; 245:117353. [DOI: 10.1016/j.lfs.2020.117353] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 01/20/2020] [Accepted: 01/22/2020] [Indexed: 11/23/2022]
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28
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Štšepetova J, Baranova J, Simm J, Parm Ü, Rööp T, Sokmann S, Korrovits P, Jaagura M, Rosenstein K, Salumets A, Mändar R. The complex microbiome from native semen to embryo culture environment in human in vitro fertilization procedure. Reprod Biol Endocrinol 2020; 18:3. [PMID: 31948459 PMCID: PMC6966866 DOI: 10.1186/s12958-019-0562-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 12/30/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Only a few microbial studies have conducted in IVF (in vitro fertilization), showing the high-variety bacterial contamination of IVF culture media to cause damage to or even loss of cultured oocytes and embryos. We aimed to determine the prevalence and counts of bacteria in IVF samples, and to associate them with clinical outcome. METHODS The studied samples from 50 infertile couples included: raw (n = 48), processed (n = 49) and incubated (n = 50) sperm samples, and IVF culture media (n = 50). The full microbiome was analyzed by 454 pyrosequencing and quantitative analysis by real-time quantitative PCR. Descriptive statistics, t-, Mann-Whitney tests and Spearman's correlation were used for comparison of studied groups. RESULTS The study involved normozoospermic men. Normal vaginal microbiota was present in 72.0% of female partners, while intermediate microbiota and bacterial vaginosis were diagnosed in 12.0 and 16.0%, respectively. The decreasing bacterial loads were found in raw (35.5%), processed (12.0%) and sperm samples used for oocyte insemination (4.0%), and in 8.0% of IVF culture media. The most abundant genera of bacteria in native semen and IVF culture media were Lactobacillus, while in other samples Alphaproteobacteria prevailed. Staphylococcus sp. was found only in semen from patients with inflammation. Phylum Bacteroidetes was in negative correlation with sperm motility and Alphaproteobacteria with high-quality IVF embryos. CONCLUSION Our study demonstrates that IVF does not occur in a sterile environment. The prevalent bacteria include classes Bacilli in raw semen and IVF culture media, Clostridia in processed and Bacteroidia in sperm samples used for insemination. The presence of Staphylococcus sp. and Alphaproteobacteria associated with clinical outcomes, like sperm and embryo quality.
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Affiliation(s)
- Jelena Štšepetova
- Institute of Biomedicine and Translational Medicine, Department of Microbiology, University of Tartu, Ravila 19, 50411, Tartu, Estonia.
- Competence Centre on Health Technologies, Tiigi 61B, 50410, Tartu, Estonia.
| | - Juliana Baranova
- Institute of Biomedicine and Translational Medicine, Department of Microbiology, University of Tartu, Ravila 19, 50411, Tartu, Estonia
| | - Jaak Simm
- Department of Gene Technology, Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia
| | - Ülle Parm
- Institute of Biomedicine and Translational Medicine, Department of Microbiology, University of Tartu, Ravila 19, 50411, Tartu, Estonia
- Tartu Health Care College, Nooruse 5, 50411, Tartu, Estonia
| | - Tiiu Rööp
- Institute of Biomedicine and Translational Medicine, Department of Microbiology, University of Tartu, Ravila 19, 50411, Tartu, Estonia
| | - Sandra Sokmann
- Institute of Biomedicine and Translational Medicine, Department of Microbiology, University of Tartu, Ravila 19, 50411, Tartu, Estonia
| | - Paul Korrovits
- Institute of Biomedicine and Translational Medicine, Department of Microbiology, University of Tartu, Ravila 19, 50411, Tartu, Estonia
- Competence Centre on Health Technologies, Tiigi 61B, 50410, Tartu, Estonia
- Andrology Centre, Tartu University Hospital, L. Puusepa 1A, 50416, Tartu, Estonia
| | - Madis Jaagura
- NovaVita Clinic, Tammsaare tee 47, 11316, Tallinn, Estonia
| | | | - Andres Salumets
- Competence Centre on Health Technologies, Tiigi 61B, 50410, Tartu, Estonia
- Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila 19, 50411, Tartu, Estonia
- Institute of Clinical Medicine, Department of Obstetrics and Gynecology, University of Tartu, L. Puusepa 8, 50406, Tartu, Estonia
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Haartmaninkatu 2, SF.00290, Helsinki, Finland
| | - Reet Mändar
- Institute of Biomedicine and Translational Medicine, Department of Microbiology, University of Tartu, Ravila 19, 50411, Tartu, Estonia
- Competence Centre on Health Technologies, Tiigi 61B, 50410, Tartu, Estonia
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Anthocyanin-enriched bilberry extract attenuates glycaemic response in overweight volunteers without changes in insulin. J Funct Foods 2020. [DOI: 10.1016/j.jff.2019.103597] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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30
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Gastrointestinal survival and potential bioactivities of Lactobacillus curieae CCTCC M2011381 in the fermentation of plant food. Process Biochem 2020. [DOI: 10.1016/j.procbio.2019.10.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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31
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Zhao L, Wang Y, Zhang G, Zhang T, Lou J, Liu J. L-Arabinose Elicits Gut-Derived Hydrogen Production and Ameliorates Metabolic Syndrome in C57BL/6J Mice on High-Fat-Diet. Nutrients 2019; 11:nu11123054. [PMID: 31847305 PMCID: PMC6950088 DOI: 10.3390/nu11123054] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/07/2019] [Accepted: 12/10/2019] [Indexed: 12/26/2022] Open
Abstract
Obesity and metabolic syndrome (MS) associated with excess calorie intake has become a great public health concern worldwide. L-arabinose, a naturally occurring plant pentose, has a promising future as a novel food ingredient with benefits in MS; yet the mechanisms remain to be further elucidated. Gut microbiota is recently recognized to play key roles in MS. Molecular hydrogen, an emerging medical gas with reported benefits in MS, can be produced and utilized by gut microbes. Here we show oral L-arabinose elicited immediate and robust release of hydrogen in mice in a dose-and-time-dependent manner while alleviating high-fat-diet (HFD) induced MS including increased body weight especially fat weight, impaired insulin sensitivity, liver steatosis, dyslipidemia and elevated inflammatory cytokines. Moreover, L-arabinose modulated gene-expressions involved in lipid metabolism and mitochondrial function in key metabolic tissues. Antibiotics treatment abolished L-arabinose-elicited hydrogen production independent of diet type, confirming gut microbes as the source of hydrogen. q-PCR of fecal 16S rDNA revealed modulation of relative abundances of hydrogen-producing and hydrogen-consuming gut microbes as well as probiotics by HFD and L-arabinose. Our data uncovered modulating gut microbiota and hydrogen yield, expression of genes governing lipid metabolism and mitochondrial function in metabolic tissues is underlying L-arabinose's benefits in MS.
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Barton LL, Granat AS, Lee S, Xu H, Ritz NL, Hider R, Lin HC. Bismuth(III) interactions with Desulfovibrio desulfuricans: inhibition of cell energetics and nanocrystal formation of Bi2S3 and Bi0. Biometals 2019; 32:803-811. [DOI: 10.1007/s10534-019-00213-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 08/29/2019] [Indexed: 02/04/2023]
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33
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Ji YJ, Li H, Xie PF, Li ZH, Li HW, Yin YL, Blachier F, Kong XF. Stages of pregnancy and weaning influence the gut microbiota diversity and function in sows. J Appl Microbiol 2019; 127:867-879. [PMID: 31237071 PMCID: PMC6852164 DOI: 10.1111/jam.14344] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/07/2019] [Accepted: 05/14/2019] [Indexed: 12/17/2022]
Abstract
Aims The gut microbiota is believed to play important roles in the health of pregnant mammals, including their nutrient metabolism, immune programming and metabolic regulation. However, until recently, the shifts in gut microbiota composition and faecal and blood metabolic activity during different stages of pregnancy had not been investigated. Methods and Results We investigated the shifts in backfat thickness, plasma and faecal metabolites and gut microbiota on days 30, 60, 90 and 110 of pregnancy and on day 21 after parturition (weaning) in sows. The backfat thickness of sows did not significantly differ among the different stages of pregnancy. The plasma concentrations of lipid metabolites, including triacylglycerol (TG), total cholesterol, high‐density lipoprotein‐cholesterol, low‐density lipoprotein‐cholesterol and calcium were reduced (P < 0·05) during pregnancy. In addition, the concentration of these metabolites, except TG, reached their maximum at the time of weaning. We also found that Tenericutes, Fibrobacteres and Cyanobacteria varied significantly according to the stages of pregnancy in sows (P < 0·05). Most of the genera, such as Clostridiales, Desulfovibrio, Mogibacteriaceae and Prevotella, increased (P < 0·05) with the progression of pregnancy and decreased (P < 0·05) at weaning. The alpha diversity values (i.e., Shannon diversity and observed species) of sow gut microbiota increased (P < 0·05) from pregnancy to weaning. Pregnancy stages also significantly influenced (P < 0·05) the community structure (beta diversity) of gut microbiota. The progression of pregnancy was associated with changes in lipid metabolism and several carbohydrate‐degradation bacteria (i.e., Prevotella, Succinivibrio, Bacteroides and Parabacteroides). Conclusions Although causal links between the measured parameters remain hypothetical, these findings suggest that the increased diversity and concentration of beneficial gut microbes are associated with the metabolism of pregnant sows. Significance and Impact of the Study Manipulation of the sow gut microbiota composition may potentially influence metabolism and health during pregnancy.
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Affiliation(s)
- Y J Ji
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - H Li
- Institute of Occupational Health and Environmental Health, School of Public Health, Lanzhou University, Lanzhou, China
| | - P F Xie
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - Z H Li
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - H W Li
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - Y L Yin
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
| | - F Blachier
- UMR PNCA, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - X F Kong
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China
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Wu H, Meng Q, Zhou Z, Yu Z. Ferric citrate, nitrate, saponin and their combinations affect in vitro ruminal fermentation, production of sulphide and methane and abundance of select microbial populations. J Appl Microbiol 2019; 127:150-158. [PMID: 31004543 DOI: 10.1111/jam.14286] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 04/10/2019] [Accepted: 04/14/2019] [Indexed: 01/22/2023]
Abstract
AIMS This study investigated the effects of ferric citrate, nitrate and saponin, both individually and in combination, on sulphidogenesis, methanogenesis, rumen fermentation and abundances of select microbial populations using in vitro rumen cultures. METHODS AND RESULTS Ferric citrate (50 mg l-1 ), Quillaja saponin (0·6 g l-1 ) and sodium nitrate (5 mmol l-1 ) were used in in vitro ruminal fermentation. Ferric citrate alone, its combination with saponin and/or nitrate lowered the aqueous sulphide concentration and total sulphide production. Methane production was suppressed by nitrate alone (by up to 32·92%), its combination with saponin (25·04%) and with both saponins with nitrate (25·92%). None of the treatments adversely affected feed digestion or rumen fermentation. The population of sulphate-reducing bacteria was increased by nitrate and saponin individually, while that of total Archaea was decreased by nitrate alone and the combination of the three inhibitors. CONCLUSIONS Nitrate and its combination with saponin or both ferric citrate and saponin substantially decreased methane production. Most importantly, the decreased methane production was not at the expense of feed digestion or fermentation. Sulphidogenesis from the sulphate present in the high-sulphur diets can be suppressed competitively by ferric citrate, although it was elevated by saponin and nitrate. SIGNIFICANCE AND IMPACT OF THE STUDY The results of this study demonstrated that combinations of certain methane inhibitors, which have different mechanisms of antimethanogenic actions or inhibit different guilds of microbes involved in methane production and sulphate reduction, can be more effective and practical than individual inhibitors, not only in mitigating enteric methane emission but also in lowering the risk of sulphur-associated polioencephalomalacia in feedlot cattle fed high sulphur diets.
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Affiliation(s)
- H Wu
- College of Animal Science and Technology and State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Department of Animal Sciences, The Ohio State University, Columbus, OH, USA
| | - Q Meng
- College of Animal Science and Technology and State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Z Zhou
- College of Animal Science and Technology and State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Z Yu
- Department of Animal Sciences, The Ohio State University, Columbus, OH, USA
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Ran S, Mu C, Zhu W. Diversity and community pattern of sulfate-reducing bacteria in piglet gut. J Anim Sci Biotechnol 2019; 10:40. [PMID: 31110701 PMCID: PMC6513522 DOI: 10.1186/s40104-019-0346-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 03/21/2019] [Indexed: 11/17/2022] Open
Abstract
Background Among the gut microbiota, sulfate-reducing bacteria (SRB) is a kind of hydrogen-utilizing functional bacteria that plays an important role in intestinal hydrogen and sulfur metabolism. However, information is lacking regarding diversity and community structure of SRB in the gut of piglets. Middle cecum contents were collected from 6 Yorkshire and 6 Meishan piglets at postnatal days (PND) 14, 28 and 49. Piglets were weaned at PND28. Real-time quantitative PCR was performed to detect the number of SRB in the cecum based on dissimilatory sulfite reductase subunit A (dsrA) gene. Prior to real-time PCR, plasmid containing the dsrA gene was constructed and used as external standard to create a standard curve, from which the gene copies of dsrA were calculated. H2S concentration in the cecal contents was measured. Illumina PE250 sequencing of dsrA gene was used to investigate SRB diversity in cecum contents. Results The qPCR results showed that the number of SRB at PND49 was significantly higher than that at PND28 in Meishan piglets. The concentration of H2S has no significant difference between piglet breeds and between different ages. The Illumina sequencing analysis revealed that the Chao1 richness index was significantly higher at PND49 than that at PND14 and PND28 in Yorkshire piglets. Based on dsrA gene similarities, Proteobacteria, Actinobacteria, and Firmicutes were identified at the phylum level, and most sequences were classified as Proteobacteria. At the genus level, most of sequences were classified as Desulfovibrio. At the species level, Desulfovibrio intestinalis was the predominant SRB in the piglet cecum. The relative abundance and the inferred absolute abundance of Faecalibacterium prausnitzii at PND49 were significantly higher than that at PND14 in Yorkshire piglets. Pig breeds did not affect the dsrA gene copies of SRB, diversity index and community pattern of SRB. Conclusions Sulfate-reducing bacteria are widely colonized in the cecum of piglets and D. intestinalis is the dominant SRB. The age of piglets, but not the pig breeds affects the diversity and community pattern of SRB. Electronic supplementary material The online version of this article (10.1186/s40104-019-0346-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shuwen Ran
- 1Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, No. 6, Tongwei Road, Nanjing, 210095 Jiangsu China.,2National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, 210095 China
| | - Chunlong Mu
- 1Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, No. 6, Tongwei Road, Nanjing, 210095 Jiangsu China.,2National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, 210095 China
| | - Weiyun Zhu
- 1Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, No. 6, Tongwei Road, Nanjing, 210095 Jiangsu China.,2National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, 210095 China
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Do different livestock dwellings on single grassland share similar faecal microbial communities? Appl Microbiol Biotechnol 2019; 103:5023-5037. [PMID: 31055653 DOI: 10.1007/s00253-019-09849-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/25/2019] [Accepted: 04/11/2019] [Indexed: 12/27/2022]
Abstract
Huge numbers of microorganisms reside in livestock faeces and constitute one of the most complex microbial ecosystems. Here, faecal microbial communities of three typical livestock in Xilingol steppe grassland, i.e. sheep, cattle, and horse, were investigated by Illumina MiSeq sequencing and quantitative real-time polymerase chain reaction (qPCR). Firmicutes and Bacteroidetes comprised the majority of bacterial communities in three livestock faeces. Sordariomycetes, Leotiomycetes, and Dothideomycetes were dominant in fungal communities, as well as Methanobacteria and Methanomicrobia were dominant in archaeal communities in three livestock faeces. Similar fungal community dominated in these samples, with 95.51% of the sequences falling into the overlap of three livestock faeces. In contrast, bacterial communities were quite variable among three different livestock faeces, but a similar community was observed in sheep and cattle faeces. Nearly all the archaea were identified as methanogens, whilst the most diverse and abundant methanogens were detected in cattle faeces. Potential pathogens including Bacteroides spp., Desulfovibrio spp., and Fusarium spp. were also detected in livestock faeces. Overall, this study provides the first detailed microbial comparison of typical livestock faeces dwelling on single grassland, and may be help guide management strategies for livestock grazing and grassland restoration.
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The potential probiotic Lactobacillus rhamnosus CNCM I-3690 strain protects the intestinal barrier by stimulating both mucus production and cytoprotective response. Sci Rep 2019; 9:5398. [PMID: 30931953 PMCID: PMC6443702 DOI: 10.1038/s41598-019-41738-5] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 03/11/2019] [Indexed: 12/14/2022] Open
Abstract
The gut barrier plays an important role in human health. When barrier function is impaired, altered permeability and barrier dysfunction can occur, leading to inflammatory bowel diseases, irritable bowel syndrome or obesity. Several bacteria, including pathogens and commensals, have been found to directly or indirectly modulate intestinal barrier function. The use of probiotic strains could be an important landmark in the management of gut dysfunction with a clear impact on the general population. Previously, we found that Lactobacillus rhamnosus CNCM I-3690 can protect intestinal barrier functions in mice inflammation model. Here, we investigated its mechanism of action. Our results show that CNCM I-3690 can (i) physically maintain modulated goblet cells and the mucus layer and (ii) counteract changes in local and systemic lymphocytes. Furthermore, mice colonic transcriptome analysis revealed that CNCM I-3690 enhances the expression of genes related to healthy gut permeability: motility and absorption, cell proliferation; and protective functions by inhibiting endogenous proteases. Finally, SpaFED pili are clearly important effectors since an L. rhamnosus ΔspaF mutant failed to provide the same benefits as the wild type strain. Taken together, our data suggest that CNCM I-3690 restores impaired intestinal barrier functions via anti-inflammatory and cytoprotective responses.
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Rostok M, Hütt P, Rööp T, Smidt I, Štšepetova J, Salumets A, Mändar R. Potential vaginal probiotics: safety, tolerability and preliminary effectiveness. Benef Microbes 2019; 10:385-393. [PMID: 30882242 DOI: 10.3920/bm2016.0123] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Vaginal discharge is one of the common reasons for gynaecologist consultation, as bacterial vaginosis and candidiasis are the main causes of discharge. These patients frequently experience numerous problems due to recurrent infections, side effects and drug resistance therefore alternative drugs are needed. Our primary aim was to evaluate safety and tolerability of the potentially probiotic Lactobacillus crispatus strains in volunteer women considering themselves healthy. We also monitored the effects of these strains on vaginal health parameters and lactobacilli counts in vagina and intestine. Forty women were recruited into trial. Absence of chronic diseases was confirmed by questionnaire and blood analysis at screening visit. In randomised double-blind placebo-controlled crossover study the eligible participants were randomly allocated to one of four groups and had to consume one of the two study products (Pro I or Pro II) - a capsule containing 3 strains, 109 cfu per strain, or placebo for 1 week. Treatment period was followed by 2-week washout period and continued with second treatment and washout period. Individuals receiving firstly probiotic, received later placebo and vice versa. Blood, vaginal and faecal samples were collected, and self-reported questionnaires were applied. Thirty subjects completed the trial. The probiotic capsules were well-tolerated. The Pro II intake resulted in a significant decrease in Nugent score (from median 3.0 to 2.0, mean 3.9 to 2.6, P=0.002) and reduction in Gardnerella vaginalis counts (log10 3.57 to 2.38; P=0.027). Reduction of total vaginal bacterial counts was revealed in Pro I group (log10 7.99 to 7.72; P=0.048). In conclusion, the selected vaginal L. crispatus strains are well tolerable and Pro II mixture is prospectively effective in reducing Nugent score and vaginal counts of G. vaginalis. Therefore, these strains seem to be promising candidates for development of novel evidence-based well-focused probiotics to target female urogenital tract disorders.
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Affiliation(s)
- M Rostok
- 1 Competence Centre on Health Technologies, Tiigi 61B, Tartu 50410, Estonia.,2 Department of Microbiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila 19, Tartu 50411, Estonia
| | - P Hütt
- 1 Competence Centre on Health Technologies, Tiigi 61B, Tartu 50410, Estonia.,2 Department of Microbiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila 19, Tartu 50411, Estonia
| | - T Rööp
- 1 Competence Centre on Health Technologies, Tiigi 61B, Tartu 50410, Estonia.,2 Department of Microbiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila 19, Tartu 50411, Estonia
| | - I Smidt
- 1 Competence Centre on Health Technologies, Tiigi 61B, Tartu 50410, Estonia.,2 Department of Microbiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila 19, Tartu 50411, Estonia
| | - J Štšepetova
- 1 Competence Centre on Health Technologies, Tiigi 61B, Tartu 50410, Estonia.,2 Department of Microbiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila 19, Tartu 50411, Estonia
| | - A Salumets
- 1 Competence Centre on Health Technologies, Tiigi 61B, Tartu 50410, Estonia
| | - R Mändar
- 1 Competence Centre on Health Technologies, Tiigi 61B, Tartu 50410, Estonia.,2 Department of Microbiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila 19, Tartu 50411, Estonia
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Dobranowski PA, Tang C, Sauvé JP, Menzies SC, Sly LM. Compositional changes to the ileal microbiome precede the onset of spontaneous ileitis in SHIP deficient mice. Gut Microbes 2019; 10:578-598. [PMID: 30760087 PMCID: PMC6748580 DOI: 10.1080/19490976.2018.1560767] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Inflammatory bowel disease, encompassing both ulcerative colitis and Crohn's disease, is characterized by chronic, relapsing-remitting gastrointestinal inflammation of unknown etiology. SHIP deficient mice develop fully penetrant, spontaneous ileitis at 6 weeks of age, and thus offer a tractable model of Crohn's disease-like inflammation. Since disruptions to the microbiome are implicated in the pathogenesis of Crohn's disease, we conducted a 16S rRNA gene survey of the ileum, cecum, colon, and stool contents of SHIP+/+ and SHIP-/- mice. We predicted that diversity and compositional changes would occur after, and possibly prior to, the onset of overt disease. No differences were found in alpha diversity, but significant changes in beta diversity and specific commensal populations were observed in the ileal compartment of SHIP deficient mice after the onset of overt disease. Specifically, reductions in the Bacteroidales taxa, Muribaculum intestinale, and an expansion in Lactobacillus were most notable. In contrast, expansions to bacterial taxa previously associated with inflammation, including Bacteroides, Parabacteroides, and Prevotella were observed in the ilea of SHIP deficient mice prior to the onset of overt disease. Finally, antibiotic treatment reduced the development of intestinal inflammation in SHIP-/- mice. Thus, our findings indicate that SHIP is involved in maintaining ileal microbial homeostasis. These results have broader implications for humans, since reduced SHIP protein levels have been reported in people with Crohn's disease.
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Affiliation(s)
| | | | | | | | - Laura May Sly
- University of British Columbia,BC Children’s Hospital research institute,CONTACT Laura May Sly BC Children’s Hospital research institute, 950 West 28th Avenue, A5-142TRB, Vancouver, British Columbia V5Z 4H4, Canada
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40
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Wu SS, Hernández M, Deng YC, Han C, Hong X, Xu J, Zhong WH, Deng H. The voltage signals of microbial fuel cell-based sensors positively correlated with methane emission flux in paddy fields of China. FEMS Microbiol Ecol 2019; 95:5304610. [DOI: 10.1093/femsec/fiz018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 01/29/2019] [Indexed: 01/29/2023] Open
Affiliation(s)
- Shao-Song Wu
- School of Environment, Nanjing Normal University, Nanjing 210023, China
- School of Geography Science, Nanjing Normal University, Nanjing 210023, China
| | - Marcela Hernández
- Centre for Biological Sciences, University of Southampton, Southampton SO17 1BJ, UK
| | - Yong-Cui Deng
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing 210023, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China
| | - Cheng Han
- School of Geography Science, Nanjing Normal University, Nanjing 210023, China
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing 210023, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China
| | - Xin Hong
- School of Environment, Nanjing Normal University, Nanjing 210023, China
- School of Geography Science, Nanjing Normal University, Nanjing 210023, China
| | - Jie Xu
- School of Geography Science, Nanjing Normal University, Nanjing 210023, China
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing 210023, China
| | - Wen-Hui Zhong
- School of Geography Science, Nanjing Normal University, Nanjing 210023, China
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing 210023, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China
| | - Huan Deng
- School of Environment, Nanjing Normal University, Nanjing 210023, China
- School of Geography Science, Nanjing Normal University, Nanjing 210023, China
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Abstract
Hydrogen plays a key role in many microbial metabolic pathways in the human gastrointestinal tract (GIT) that have an impact on human nutrition, health and wellbeing. Hydrogen is produced by many members of the GIT microbiota, and may be subsequently utilized by cross-feeding microbes for growth and in the production of larger molecules. Hydrogenotrophic microbes fall into three functional groups: sulfate-reducing bacteria, methanogenic archaea and acetogenic bacteria, which can convert hydrogen into hydrogen sulfide, methane and acetate, respectively. Despite different energy yields per molecule of hydrogen used between the functional groups, all three can coexist in the human GIT. The factors affecting the numerical balance of hydrogenotrophs in the GIT remain unconfirmed. There is increasing evidence linking both hydrogen sulfide and methane to GIT diseases such as irritable bowel syndrome, and strategies for the mitigation of such health problems through targeting of hydrogenotrophs constitute an important field for further investigation.
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Affiliation(s)
- Nick W. Smith
- AgResearch, Ruakura Research Centre, Hamilton, New Zealand,AgResearch, Grasslands Research Centre, Palmerston North, New Zealand,Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Paul R. Shorten
- AgResearch, Ruakura Research Centre, Hamilton, New Zealand,Riddet Institute, Massey University, Palmerston North, New Zealand,CONTACT Paul R. Shorten AgResearch, Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand
| | - Eric H. Altermann
- AgResearch, Grasslands Research Centre, Palmerston North, New Zealand,Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Nicole C. Roy
- AgResearch, Grasslands Research Centre, Palmerston North, New Zealand,Riddet Institute, Massey University, Palmerston North, New Zealand,High-Value Nutrition National Science Challenge, hosted by The University of Auckland, Auckland, New Zealand
| | - Warren C. McNabb
- Riddet Institute, Massey University, Palmerston North, New Zealand
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Chen L, Jiang B, Zhong C, Guo J, Zhang L, Mu T, Zhang Q, Bi X. Chemoprevention of colorectal cancer by black raspberry anthocyanins involved the modulation of gut microbiota and SFRP2 demethylation. Carcinogenesis 2018; 39:471-481. [PMID: 29361151 DOI: 10.1093/carcin/bgy009] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Accepted: 01/13/2018] [Indexed: 12/12/2022] Open
Abstract
Freeze-dried black raspberry (BRB) powder is considered as a potential cancer chemopreventive agent. In this study, we fed azoxymethane (AOM)/dextran sodium sulfate (DSS)-treated C57BL/6J mice with a diet containing BRB anthocyanins for 12 weeks, and this led to a reduction in colon carcinogenesis. These animals had consistently lower tumor multiplicity compared with AOM/DSS-treated mice not receiving BRB anthocyanins. In AOM/DSS-treated mice, the number of pathogenic bacteria, including Desulfovibrio sp. and Enterococcus spp., was increased significantly, whereas probiotics such as Eubacterium rectale, Faecalibacterium prausnitzii and Lactobacillus were dramatically decreased, but BRB anthocyanins supplement could reverse this imbalance in gut microbiota. BRB anthocyanins also caused the demethylation of the SFRP2 gene promoter, resulting in increased expression of SFRP2, both at the mRNA and protein levels. Furthermore, the expression levels of DNMT31 and DNMT3B, as well as of p-STAT3 were downregulated by BRB anthocyanins in these animals. Taken together, these results suggested that BRB anthocyanins could modulate the composition of gut commensal microbiota, and changes in inflammation and the methylation status of the SFRP2 gene may play a central role in the chemoprevention of CRC.
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Affiliation(s)
- Lili Chen
- Department of Biotechnology, College of Life Science, Liaoning University, Shenyang, China
| | - Bowen Jiang
- Department of Biotechnology, College of Life Science, Liaoning University, Shenyang, China
| | - Chunge Zhong
- Department of Biotechnology, College of Life Science, Liaoning University, Shenyang, China
| | - Jun Guo
- Department of Biotechnology, College of Life Science, Liaoning University, Shenyang, China
| | - Lihao Zhang
- Department of Biotechnology, College of Life Science, Liaoning University, Shenyang, China
| | - Teng Mu
- Department of Biotechnology, College of Life Science, Liaoning University, Shenyang, China
| | - Qiuhua Zhang
- Department of Pharmacology, Liaoning University of Traditional Chinese Medicine, Shenyang, PR China
| | - Xiuli Bi
- Department of Biotechnology, College of Life Science, Liaoning University, Shenyang, China.,Department of Biotechnology, Research Center for Computer Simulating and Information Processing of Bio-macromolecules of Liaoning Province, Liaoning University, Shenyang, China
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Earley AM, Graves CL, Shiau CE. Critical Role for a Subset of Intestinal Macrophages in Shaping Gut Microbiota in Adult Zebrafish. Cell Rep 2018; 25:424-436. [PMID: 30304682 PMCID: PMC6245655 DOI: 10.1016/j.celrep.2018.09.025] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 06/27/2018] [Accepted: 09/07/2018] [Indexed: 02/07/2023] Open
Abstract
The gut microbiota is strongly influenced by environmental factors, although host contribution is far less understood. We leveraged macrophage-deficient interferon regulatory factor irf8 zebrafish mutants to investigate the role of macrophages in this process. In conventionally raised adult irf8-deficient mutants, we found a significant loss of intestinal macrophages associated with a strikingly altered gut microbiota when compared to co-housed siblings. The destabilization of the gut commensal microbiota was associated with a severe reduction in complement C1q genes and outgrowth of a rare bacterial species. Consistent with a critical function of irf8 in adult intestinal macrophages, irf8 is abundantly expressed in these cells normally, and restoring macrophage irf8 expression in irf8 mutants was sufficient to recover commensal microbes and C1q genes expression. This study reports an important subpopulation of intestinal macrophages that requires irf8 to establish in the gut, ensure normal colonization of gut microbes, and prevent immune dysregulation.
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Affiliation(s)
- Alison M Earley
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Christina L Graves
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Celia E Shiau
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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Rath S, Rud T, Karch A, Pieper DH, Vital M. Pathogenic functions of host microbiota. MICROBIOME 2018; 6:174. [PMID: 30266099 PMCID: PMC6162913 DOI: 10.1186/s40168-018-0542-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 08/29/2018] [Indexed: 05/11/2023]
Abstract
BACKGROUND It is becoming evident that certain features of human microbiota, encoded by distinct autochthonous taxa, promote disease. As a result, borders between the so-called opportunistic pathogens, pathobionts, and commensals are increasingly blurred, and specific targets for manipulating microbiota to improve host health are becoming elusive. RESULTS In this study, we focus on the functions of host bacterial communities that have the potential to cause disease, proposing the term "pathogenic function (pathofunction)". The concept is presented via three distinct examples, namely, the formation of (i) trimethylamine, (ii) secondary bile acids, and (iii) hydrogen sulfide, which represent metabolites of the gut microbiota linked to the development of non-communicable diseases. Using publicly available metagenomic and metatranscriptomic data (n = 2975), we quantified those pathofunctions in health and disease and exposed the key players. Pathofunctions were ubiquitously present with increased abundances in patient groups. Overall, the three pathofunctions were detected at low mean concentrations (< 1% of total bacteria carried respective genes) and encompassed various taxa, including uncultured members. CONCLUSIONS We outline how this function-centric approach, where all members of a community exhibiting a particular pathofunction are redundant, can contribute to risk assessment and the development of precision treatment directing gut microbiota to increase host health.
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Affiliation(s)
- Silke Rath
- Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Tatjana Rud
- Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - André Karch
- Epidemiological and Statistical Methods Research Group, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Dietmar Helmut Pieper
- Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Marius Vital
- Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, Braunschweig, Germany
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45
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The effect of Lactobacillus fermentum ME-3 on the intestinal microbiota and urine polyamines content: A double-blind placebo-controlled pilot trial. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.04.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Ding C, Alvarez-Cohen L, He J. Growth of Dehalococcoides mccartyi species in an autotrophic consortium producing limited acetate. Biodegradation 2018; 29:487-498. [PMID: 30097751 DOI: 10.1007/s10532-018-9846-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 07/30/2018] [Indexed: 11/24/2022]
Abstract
The dechlorinating Dehalococcoides mccartyi species requires acetate as carbon source, but little is known on its growth under acetate limiting conditions. In this study, we observed growth and dechlorination of a D. mccartyi-containing mixed consortium in a fixed-carbon-free medium with trichloroethene in the aqueous phase and H2/CO2 in the headspace. Around 4 mM formate was produced by day 40, while acetate was constantly below 0.05 mM. Microbial community analysis of the consortium revealed dominance by D. mccartyi and Desulfovibrio sp. (57 and 22% 16S rRNA gene copies, respectively). From this consortium, Desulfovibrio sp. strain F1 was isolated and found to produce formate and acetate (1.2 mM and 48 µM, respectively, by day 24) when cultivated alone in the above mentioned medium without trichloroethene. An established co-culture of strain F1 and D. mccartyi strain 195 demonstrated that strain 195 could grow and dechlorinate using acetate produced by strain F1; and that acetate was constantly below 25 µM in the co-culture. To verify that such low level of acetate is utilizable by D. mccartyi, we cultivated strain 195 alone under acetate-limiting conditions and found that strain 195 consumed acetate to below detection (5 µM). Based on the acetate consumption and cell yield of D. mccartyi, we estimated that on average 1.2 × 108 acetate molecules are needed to supply carbon for one D. mccartyi cell. Our study suggests that Desulfovibrio may supply a steady but low amount of fixed carbon to dechlorinating bacteria, exhibiting important implications for natural bio-attenuation when fixed carbon is limited.
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Affiliation(s)
- Chang Ding
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore, 117576, Singapore.,Department of Isotope Biogeochemistry, Helmholtz-Centre for Environmental Research - UFZ, 04318, Leipzig, Germany
| | - Lisa Alvarez-Cohen
- Department of Civil and Environmental Engineering, University of California, Berkeley, CA, 94720-1710, USA. .,Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA, 94720, USA.
| | - Jianzhong He
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore, 117576, Singapore. .,Department of Civil and Environmental Engineering, National University of Singapore, Block E2-02-13, 1 Engineering Drive 3, Singapore, 117576, Singapore.
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47
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Chen B, Chen H, Shu X, Yin Y, Li J, Qin J, Chen L, Peng K, Xu F, Gu W, Zhao H, Jiang L, Li L, Song J, Elitsur Y, Yu HD, Jiang M, Wang X, Xiang C. Presence of Segmented Filamentous Bacteria in Human Children and Its Potential Role in the Modulation of Human Gut Immunity. Front Microbiol 2018; 9:1403. [PMID: 30008704 PMCID: PMC6034559 DOI: 10.3389/fmicb.2018.01403] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 06/07/2018] [Indexed: 01/19/2023] Open
Abstract
Segmented filamentous bacteria (SFB) are commensal organisms that grow by anchoring a specialized holdfast structure to the intestinal walls of a variety of animals. Interaction of SFB with Peyer's patches in mice promotes the post-natal maturation of the immune system. We previously reported that the colonization of SFB in humans mainly occurs by 36 months of age, and is difficult to be detected afterward. In this study, we measured the level of SFB in intestinal fluids of human children. SFB were found via qPCR to represent a small fraction of the whole SFB-positive microbiota (105 SFB in 1011 total bacteria). Bacteria with filamentous segmented morphology were observed in intestinal fluids via fluorescent in situ hybridization, and from gut biopsies via scanning electron microscopy. SFB-specific DNA and peptide fragments were also identified via multiple displacement amplification PCR and mass spectrometry. There was an overall positive correlation between the presence of SFB and the titer of total secretory immunoglobulin A (sIgA), which is more apparent in intestinal fluids of the age group of 8-36 months. Afterward there was a decline of SFB in numbers correlated with a reduction of total sIgA. RT-qPCR analysis of the terminal ileal biopsies revealed that the expression of Th17 pathway genes were induced in SFB-positive samples, while the markers of T and B cell receptor signaling pathways were also upregulated. Collectively, these data suggest that SFB is a rare member of microbiota, and may play an important role in the development of human gut immunity.
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Affiliation(s)
- Bo Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases–Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Department of Gastroenterology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Huahai Chen
- State Key Laboratory of Breeding Base for Zhejiang Sustainable Pest–Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Xiaoli Shu
- Department of Gastroenterology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yeshi Yin
- State Key Laboratory of Breeding Base for Zhejiang Sustainable Pest–Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Jia Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases–Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | | | - Lijun Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases–Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Kerong Peng
- Department of Gastroenterology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Fei Xu
- State Key Laboratory of Breeding Base for Zhejiang Sustainable Pest–Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Weizhong Gu
- Department of Gastroenterology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hong Zhao
- Department of Gastroenterology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Liqin Jiang
- Department of Gastroenterology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lanjuan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases–Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jian Song
- Advanced Information Systems, Exelis, Herndon, VA, United States
| | - Yoram Elitsur
- Department of Pediatrics, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, United States
| | - Hongwei D. Yu
- Department of Pediatrics, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, United States
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, United States
| | - Mizu Jiang
- Department of Gastroenterology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xin Wang
- State Key Laboratory of Breeding Base for Zhejiang Sustainable Pest–Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Charlie Xiang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases–Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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48
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Kellingray L, Tapp HS, Saha S, Doleman JF, Narbad A, Mithen RF. Consumption of a diet rich in Brassica vegetables is associated with a reduced abundance of sulphate-reducing bacteria: A randomised crossover study. Mol Nutr Food Res 2017; 61:1600992. [PMID: 28296348 PMCID: PMC5600105 DOI: 10.1002/mnfr.201600992] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 02/16/2017] [Accepted: 02/24/2017] [Indexed: 02/06/2023]
Abstract
SCOPE We examined whether a Brassica-rich diet was associated with an increase in the relative abundance of intestinal lactobacilli and sulphate-reducing bacteria (SRB), or alteration to the composition of the gut microbiota, in healthy adults. METHODS AND RESULTS A randomised crossover study was performed with ten healthy adults who were fed a high- and a low-Brassica diet for 2-wk periods, with a 2-wk washout phase separating the diets. The high-Brassica diet consisted of six 84 g portions of broccoli, six 84 g portions of cauliflower and six 300 g portions of a broccoli and sweet potato soup. The low-Brassica diet consisted of one 84 g portion of broccoli and one 84 g portion of cauliflower. Faecal microbiota composition was measured in samples collected following 2-wk Brassica-free periods (consumption of all Brassica prohibited), and after each diet, whereby the only Brassica consumed was that supplied by the study team. No significant changes to the relative abundance of lactobacilli were observed (p = 0.8019). The increased consumption of Brassica was associated with a reduction in the relative abundance of SRB (p = 0.0215), and members of the Rikenellaceae, Ruminococcaceae, Mogibacteriaceae, Clostridium and unclassified Clostridiales (p < 0.01). CONCLUSION The increased consumption of Brassica vegetables was linked to a reduced relative abundance of SRB, and therefore may be potentially beneficial to gastrointestinal health.
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Affiliation(s)
- Lee Kellingray
- Food and Health ProgrammeInstitute of Food ResearchNorwich Research ParkNorwichUK
| | - Henri S. Tapp
- Analytical Sciences UnitInstitute of Food ResearchNorwich Research ParkNorwichUK
| | - Shikha Saha
- Food and Health ProgrammeInstitute of Food ResearchNorwich Research ParkNorwichUK
| | - Joanne F. Doleman
- Food and Health ProgrammeInstitute of Food ResearchNorwich Research ParkNorwichUK
| | - Arjan Narbad
- Gut Health and Food Safety ProgrammeInstitute of Food ResearchNorwich Research ParkNorwichUK
| | - Richard F. Mithen
- Food and Health ProgrammeInstitute of Food ResearchNorwich Research ParkNorwichUK
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49
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Wang Y, Liu F, Zhang X, Chung HKL, Riordan SM, Grimm MC, Zhang S, Ma R, Lee SA, Zhang L. Campylobacter concisus Genomospecies 2 Is Better Adapted to the Human Gastrointestinal Tract as Compared with Campylobacter concisus Genomospecies 1. Front Physiol 2017; 8:543. [PMID: 28824443 PMCID: PMC5541300 DOI: 10.3389/fphys.2017.00543] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 07/12/2017] [Indexed: 01/26/2023] Open
Abstract
Campylobacter concisus was previously shown to be associated with inflammatory bowel disease including Crohn's disease (CD) and ulcerative colitis (UC). C. concisus has two genomospecies (GS). This study systematically examined the colonization of GS1 and GS2 C. concisus in the human gastrointestinal tract. GS1 and GS2 specific polymorphisms in 23S rRNA gene were identified by comparison of the 23S rRNA genes of 49 C. concisus strains. Two newly designed PCR methods, based on the polymorphisms of 23S rRNA gene, were developed and validated. These PCR methods were used to detect and quantify GS1 and GS2 C. concisus in 56 oral and enteric samples collected from the gastrointestinal tract of patients with IBD and healthy controls. Meta-analysis of the composition of the isolated GS1 and GS2 C. concisus strains in previous studies was also conducted. The quantitative PCR methods revealed that there was more GS2 than GS1 C. concisus in samples collected from the upper and lower gastrointestinal tract of both patients with IBD and healthy controls, showing that GS2 C. concisus is better adapted to the human gastrointestinal tract. Analysis of GS1 and GS2 composition of isolated C. concisus strains in previous studies showed similar findings except that in healthy individuals a significantly lower GS2 than GS1 C. concisus strains were isolated from fecal samples, suggesting a potential difference in the C. concisus strains or the enteric environment between patients with gastrointestinal diseases and healthy controls. This study provides novel information regarding the adaptation of different genomospecies of C. concisus in the human gastrointestinal tract.
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Affiliation(s)
- Yiming Wang
- School of Biotechnology and Biomolecular Sciences, University of New South WalesSydney, NSW, Australia
| | - Fang Liu
- School of Biotechnology and Biomolecular Sciences, University of New South WalesSydney, NSW, Australia
| | - Xiang Zhang
- Clinical Research Center, The First Affiliated Hospital of Nanjing Medical UniversityNanjing, China
| | - Heung Kit Leslie Chung
- School of Biotechnology and Biomolecular Sciences, University of New South WalesSydney, NSW, Australia
| | - Stephen M Riordan
- Gastrointestinal and Liver Unit, Prince of Wales Hospital, University of New South WalesSydney, NSW, Australia
| | - Michael C Grimm
- St George and Sutherland Clinical School, University of New South WalesSydney, NSW, Australia
| | - Shu Zhang
- Clinical Research Center, The First Affiliated Hospital of Nanjing Medical UniversityNanjing, China
| | - Rena Ma
- School of Biotechnology and Biomolecular Sciences, University of New South WalesSydney, NSW, Australia
| | - Seul A Lee
- School of Biotechnology and Biomolecular Sciences, University of New South WalesSydney, NSW, Australia
| | - Li Zhang
- School of Biotechnology and Biomolecular Sciences, University of New South WalesSydney, NSW, Australia
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50
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Sagheddu V, Patrone V, Miragoli F, Morelli L. Abundance and Diversity of Hydrogenotrophic Microorganisms in the Infant Gut before the Weaning Period Assessed by Denaturing Gradient Gel Electrophoresis and Quantitative PCR. Front Nutr 2017; 4:29. [PMID: 28695121 PMCID: PMC5483434 DOI: 10.3389/fnut.2017.00029] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 06/09/2017] [Indexed: 12/17/2022] Open
Abstract
Delivery mode (natural vs. cesarean) and feeding type (breast vs. formula feeding) are relevant factors for neonatal gut colonization. Biomolecular methods have shown that the ecological structure of infant microbiota is more complex than previously proposed, suggesting a relevant presence of unculturable bacteria. It has also been postulated that among unculturable bacteria, hydrogenotrophic populations might play a key role in infant health. Sulfate-reducing bacteria (SRB), acetogens, and methanogenic archaea use hydrogenotrophic pathways within the human colon. However, to date, few studies have reported detection of hydrogenotrophic microorganisms in newborns, possibly because of limitations on available group-specific, culture-independent quantification procedures. In the present work, we analyzed 16 fecal samples of healthy babies aged 1-6 months by means of quantitative PCR (qPCR) targeting the 16S rRNA or metabolic functional genes and by denaturing gradient gel electrophoresis (DGGE). qPCR data showed quantifiable levels of methanogens, SRB, and acetogens in all samples, indicating that the relative abundances of these microbial groups were not affected by delivery mode (natural vs. caesarian). DGGE revealed a high prevalence of the Blautia genus within the acetogenic bacteria despite strong interindividual variability. Our preliminary results suggest that hydrogenotrophic microorganisms, which have been a neglected group to date, should be included in future ecological and metabolic studies evaluating the infant intestinal microbiota.
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Affiliation(s)
- Valeria Sagheddu
- Facoltà di Scienze Agrarie, Alimentari e Ambientali, Istituto di Microbiologia, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Vania Patrone
- Facoltà di Scienze Agrarie, Alimentari e Ambientali, Istituto di Microbiologia, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Francesco Miragoli
- Facoltà di Scienze Agrarie, Alimentari e Ambientali, Istituto di Microbiologia, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Lorenzo Morelli
- Facoltà di Scienze Agrarie, Alimentari e Ambientali, Istituto di Microbiologia, Università Cattolica del Sacro Cuore, Piacenza, Italy
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