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Gu Y, Jiang L, Shui M, Luo H, Zhou X, Zhang S, Jiang C, Huang J, Chen H, Tang J, Fu Y, Luo H, Yang G, Xu K, Chi H, Liu J, Huang S. Revealing the association between East Asian oral microbiome and colorectal cancer through Mendelian randomization and multi-omics analysis. Front Cell Infect Microbiol 2024; 14:1452392. [PMID: 39355266 PMCID: PMC11443854 DOI: 10.3389/fcimb.2024.1452392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Accepted: 08/14/2024] [Indexed: 10/03/2024] Open
Abstract
BACKGROUND Colorectal cancer (CRC) poses a global health threat, with the oral microbiome increasingly implicated in its pathogenesis. This study leverages Mendelian Randomization (MR) to explore causal links between oral microbiota and CRC using data from the China National GeneBank and Biobank Japan. By integrating multi-omics approaches, we aim to uncover mechanisms by which the microbiome influences cellular metabolism and cancer development. METHODS We analyzed microbiome profiles from 2017 tongue and 1915 saliva samples, and GWAS data for 6692 CRC cases and 27178 controls. Significant bacterial taxa were identified via MR analysis. Single-cell RNA sequencing and enrichment analyses elucidated underlying pathways, and drug predictions identified potential therapeutics. RESULTS MR identified 19 bacterial taxa significantly associated with CRC. Protective effects were observed in taxa like RUG343 and Streptococcus_umgs_2425, while HOT-345_umgs_976 and W5053_sp000467935_mgs_712 increased CRC risk. Single-cell RNA sequencing revealed key pathways, including JAK-STAT signaling and tyrosine metabolism. Drug prediction highlighted potential therapeutics like Menadione Sodium Bisulfite and Raloxifene. CONCLUSION This study establishes the critical role of the oral microbiome in colorectal cancer development, identifying specific microbial taxa linked to CRC risk. Single-cell RNA sequencing and drug prediction analyses further elucidate key pathways and potential therapeutics, providing novel insights and personalized treatment strategies for CRC.
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Affiliation(s)
- Yuheng Gu
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Lai Jiang
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Min Shui
- Department of Oncology, Chongqing General Hospital, Chongqing University, Chongqing, China
| | - Honghao Luo
- Department of Radiology, Xichong People’s Hospital, Nanchong, China
| | - Xuancheng Zhou
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Shengke Zhang
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Chenglu Jiang
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Jinbang Huang
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Haiqing Chen
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Jingyi Tang
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Yiping Fu
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Huiyan Luo
- Department of Oncology, Chongqing General Hospital, Chongqing University, Chongqing, China
| | - Guanhu Yang
- Department of Specialty Medicine, Ohio University, Athens, OH, United States
| | - Ke Xu
- Department of Oncology, Chongqing General Hospital, Chongqing University, Chongqing, China
| | - Hao Chi
- School of Clinical Medicine, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Jie Liu
- Department of Specialty Medicine, Ohio University, Athens, OH, United States
- Department of general surgery, Dazhou Central Hospital, Dazhou, China
| | - Shangke Huang
- Department of Oncology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
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Genome-Wide Prediction of Potential Vaccine Candidates for Campylobacter jejuni Using Reverse Vaccinology. Interdiscip Sci 2017; 11:337-347. [PMID: 29128919 DOI: 10.1007/s12539-017-0260-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 08/01/2017] [Accepted: 09/01/2017] [Indexed: 10/18/2022]
Abstract
Campylobacteriosis is a deadly disease which has developed resistance to most of the available chemotherapeutic agents. Although various studies provide evidence of acquired immunity following exposure to Campylobacter jejuni, no effective vaccine has been developed, still. Hence, there is an urgent need to identify potential vaccine candidates for Campylobacter species. In the proposed study, Campylobacter jejuni subsp. jejuni serotype O:2 (strain NCTC 11168) was taken and computational approach was employed to screen C. jejuni genome for promising vaccine candidates. From 1623 protein-coding sequences, 37 potential antigens were screened for epitope prediction based on surface association, consensus antigenicity predictions, solubility, transmembrane domain, and ortholog analysis. Comprehensive immunogenic analysis of these 37 antigens revealed that antigen Q0PA22 shows the greatest potential for experimental immunogenicity analysis. It has several potential CD4+ and CD8+ T-cell epitopes, as well as high probability of B-cell epitope regions as compared to well-characterized antigen Omp18 (Uniprot ID:Q0PC24). Among the highest scoring predicted epitopes, an optimal set of epitopes with respect to overall immunogenicity in target populations for campylobacteriosis viz. Europe, North America and Southwest Asia was determined. An epitope AMLTYMQWL from antigen no. 6(Q0PA22) binds to the most prevalent allele HLA-A*0201, and this epitope has most immunogenicity for all the target populations. In addition, this epitope exhibited highly significant TCR-pMHC interactions having a joint Z value of 4.87. Homology mapping studies of the predicted epitope show best homology to a well-studied antigenic peptide from influenza virus H5N1. Therefore, the predicted epitope might be a suitable vaccine candidate.
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Thomas DK, Lone AG, Selinger LB, Taboada EN, Uwiera RRE, Abbott DW, Inglis GD. Comparative variation within the genome of Campylobacter jejuni NCTC 11168 in human and murine hosts. PLoS One 2014; 9:e88229. [PMID: 24516617 PMCID: PMC3917866 DOI: 10.1371/journal.pone.0088229] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 01/03/2014] [Indexed: 11/18/2022] Open
Abstract
Campylobacteriosis incited by C. jejuni is a significant enteric disease of human beings. A person working with two reference strains of C. jejuni National Collection of Type Cultures (NCTC) 11168 developed symptoms of severe enteritis including bloody diarrhea. The worker was determined to be infected by C. jejuni. In excess of 50 isolates were recovered from the worker's stool. All of the recovered isolates and the two reference strains were indistinguishable from each other based on comparative genomic fingerprint subtyping. Whole genome sequence analysis indicated that the worker was infected with a C. jejuni NCTC 11168 obtained from the American Type Culture Collection; this strain (NCTC 11168-GSv) is the genome sequence reference. After passage through the human host, major genetic changes including indel mutations within twelve contingency loci conferring phase variations were detected in the genome of C. jejuni. Specific and robust single nucleotide polymorphism (SNP) changes in the human host were also observed in two loci (Cj0144c, Cj1564). In mice inoculated with an isolate of C. jejuni NCTC 11168-GSv from the infected person, the isolate underwent further genetic variation. At nine loci, mutations specific to inoculated mice including five SNP changes were observed. The two predominant SNPs observed in the human host reverted in mice. Genetic variations occurring in the genome of C. jejuni in mice corresponded to increased densities of C. jejuni cells associated with cecal mucosa. In conclusion, C. jejuni NCTC 11168-GSv was found to be highly virulent in a human being inciting severe enteritis. Host-specific mutations in the person with enteritis occurred/were selected for in the genome of C. jejuni, and many were not maintained in mice. Information obtained in the current study provides new information on host-specific genetic adaptation by C. jejuni.
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Affiliation(s)
- Dallas K Thomas
- Agriculture and Agri-Food Canada Research Centre, Lethbridge, Alberta, Canada
| | - Abdul G Lone
- Agriculture and Agri-Food Canada Research Centre, Lethbridge, Alberta, Canada ; Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
| | - L Brent Selinger
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
| | | | - Richard R E Uwiera
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada
| | - D Wade Abbott
- Agriculture and Agri-Food Canada Research Centre, Lethbridge, Alberta, Canada
| | - G Douglas Inglis
- Agriculture and Agri-Food Canada Research Centre, Lethbridge, Alberta, Canada
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Murphy H, Cogan T, Hughes R, Humphrey T. Porcine intestinal epithelial responses to Campylobacter infection. Comp Immunol Microbiol Infect Dis 2011; 34:489-95. [PMID: 21944733 DOI: 10.1016/j.cimid.2011.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 08/28/2011] [Accepted: 08/31/2011] [Indexed: 11/24/2022]
Abstract
Campylobacter infection is estimated to cause diarrhoea in 1% of the population of developed countries every year, but our understanding of this disease has been hampered by a lack of a suitable animal model. Colostrum-deprived piglets have been suggested as models since they produce similar clinical signs to humans when infected but little information currently exists regarding the response of this species to Campylobacter at cellular and molecular level. This study shows that intestinal epithelial cells from both species respond in a similar manner to Campylobacter infection regarding invasion, induction of innate immune response and effect on barrier function.
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Affiliation(s)
- H Murphy
- Division of Veterinary Pathology, Infection and Immunity, School of Clinical Veterinary Science, University of Bristol, Langford House, Langford, North Somerset, BS40 5DU, UK.
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Unterer S, Strohmeyer K, Kruse BD, Sauter-Louis C, Hartmann K. Treatment of aseptic dogs with hemorrhagic gastroenteritis with amoxicillin/clavulanic acid: a prospective blinded study. J Vet Intern Med 2011; 25:973-9. [PMID: 21781168 DOI: 10.1111/j.1939-1676.2011.00765.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Antibiotics generally are recommended to treat hemorrhagic gastroenteritis (HGE). Inappropriate use of antibiotics may promote risk of antimicrobial resistance and unnecessary adverse drug reactions. The necessity of antimicrobial therapy in dogs with HGE has not been demonstrated. OBJECTIVE The purpose of this prospective, placebo-controlled, blinded study was to evaluate whether treatment with amoxicillin/clavulanic acid improves the clinical course and outcome of HGE in dogs that show no signs of sepsis. ANIMALS The study included 60 dogs diagnosed with HGE between 2007 and 2009 at the Clinic of Small Animal Medicine, LMU University of Munich, Germany. The inclusion criterion was the presence of acute hemorrhagic diarrhea (<3 days). Dogs pretreated with antibiotics, with signs of sepsis, or diagnosed with any disease known to cause bloody diarrhea were excluded from the study. METHODS Patients were randomly divided into treatment (amoxicillin/clavulanic acid for 7 days) and placebo groups. To evaluate treatment efficacy, severity of clinical signs (based on a newly developed HGE index), duration of hospitalization, and mortality rate were compared between the 2 groups. RESULTS Fifty-three of 60 dogs completed the study. No significant difference between treatment groups concerning mortality rate, dropout rate, duration of hospitalization, or severity of clinical signs, either on any individual day or over the course of disease, was observed. CONCLUSIONS AND CLINICAL IMPORTANCE In some dogs with HGE that show no signs of sepsis, antibiotics may not change the case outcome or time to recovery.
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Affiliation(s)
- S Unterer
- LMU University of Munich, Munich, Germany.
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Lynch Ó, Cagney C, McDowell D, Duffy G. A method for the growth and recovery of 17 species of Campylobacter and its subsequent application to inoculated beef. J Microbiol Methods 2010; 83:1-7. [DOI: 10.1016/j.mimet.2010.06.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Revised: 05/28/2010] [Accepted: 06/07/2010] [Indexed: 11/28/2022]
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Reezal A, McNeil B, Anderson JG. Effect of low-osmolality nutrient media on growth and culturability of Campylobacter species. Appl Environ Microbiol 1998; 64:4643-9. [PMID: 9835543 PMCID: PMC90903 DOI: 10.1128/aem.64.12.4643-4649.1998] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/1998] [Accepted: 09/22/1998] [Indexed: 11/20/2022] Open
Abstract
The growth and culturability of Campylobacter jejuni NCTC 11351 and other campylobacters were examined in media having different osmolalities at a range of temperatures (4, 25, and 42 degreesC). The medium osmolalities used ranged from the osmolality of full-strength nutrient medium (modified campylobacter broth having an osmolality of around 254 mosmol) down to 96 mosmol. The following two methods were used to produce media having different osmolalities: dilution of the nutrient medium with distilled water and reformulation of the medium such that the concentrations of various osmolytes were altered while the nutrient content of the medium was unchanged. The results obtained with the two experimental methods were similar, indicating that there was an osmotic threshold effect, such that none of the campylobacters examined (C. jejuni NCTC 11351 and ATCC 33291, Campylobacter lari, and Campylobacter coli) grew in media having osmolalities around 130 mosmol and at temperatures below at 42 degreesC. Conversely, growth occurred in media having osmolalities of around 175 mosmol and above. Osmolar concentrations can be expressed in terms of osmolarity or osmolality. Osmolality is easier to evaluate, is the more commonly used term, and was used in the current study. In nutrient media having low osmolalities (i.e., 130 mosmol and below), the number of CFUs per milliliter declined rapidly regardless of the temperature, and no cells were recovered after 24 h. However, at nongrowth temperatures (25 and 4 degreesC) in higher-osmolality media (175 mosmol and above) a significant population was recovered throughout the experiment (up to 96 h). In low-osmolality nutrient media, the cellular morphology was principally coccoid, while in the early stages of growth in full-strength media the morphology was predominantly rodlike. We propose that the formation of coccoid cells in these experiments was the result of osmotic stress in low-osmolality media. This osmotic effect was apparent regardless of the osmolyte used to reformulate the medium (NaCl, KCl, Na2SO4, NH4Cl, and glucose were used).
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Affiliation(s)
- A Reezal
- Strathclyde Fermentation Centre, Department of Bioscience and Biotechnology, University of Strathclyde, Glasgow G1 1XW, Scotland, United Kingdom
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