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Humphrey HN, Sibley P, Walker ET, Keller DS, Pata F, Vimalachandran D, Daniels IR, McDermott FD. Genetic, epigenetic and environmental factors in diverticular disease: systematic review. BJS Open 2024; 8:zrae032. [PMID: 38831715 PMCID: PMC11148476 DOI: 10.1093/bjsopen/zrae032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 02/07/2024] [Accepted: 03/03/2024] [Indexed: 06/05/2024] Open
Abstract
BACKGROUND Diverticulosis is a normal anatomical variant of the colon present in more than 70% of the westernized population over the age of 80. Approximately 3% will develop diverticulitis in their lifetime. Many patients present emergently, suffer high morbidity rates and require substantial healthcare resources. Diverticulosis is the most common finding at colonoscopy and has the potential for causing a significant morbidity rate and burden on healthcare. There is a need to better understand the aetiology and pathogenesis of diverticular disease. Research suggests a genetic susceptibility of 40-50% in the formation of diverticular disease. The aim of this review is to present the hypothesized functional effects of the identified gene loci and environmental factors. METHODS A systematic literature review was performed using PubMed, MEDLINE and Embase. Medical subject headings terms used were: 'diverticular disease, diverticulosis, diverticulitis, genomics, genetics and epigenetics'. A review of grey literature identified environmental factors. RESULTS Of 995 articles identified, 59 articles met the inclusion criteria. Age, obesity and smoking are strongly associated environmental risk factors. Intrinsic factors of the colonic wall are associated with the presence of diverticula. Genetic pathways of interest and environmental risk factors were identified. The COLQ, FAM155A, PHGR1, ARHGAP15, S100A10, and TNFSF15 genes are the strongest candidates for further research. CONCLUSION There is increasing evidence to support the role of genomics in the spectrum of diverticular disease. Genomic, epigenetic and omic research with demographic context will help improve the understanding and management of this complex disease.
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Affiliation(s)
- Hannah N Humphrey
- Department of Colorectal Surgery, Royal Devon University Healthcare Foundation Trust, Exeter, UK
| | - Pauline Sibley
- Department of Colorectal Surgery, Royal Devon University Healthcare Foundation Trust, Exeter, UK
| | - Eleanor T Walker
- Department of Colorectal Surgery, Royal Devon University Healthcare Foundation Trust, Exeter, UK
| | - Deborah S Keller
- Department of Surgery, Lankenau Medical Center and Lankenau Institute for Medical Research, Wynnewood, Pennsylvania, USA
| | - Francesco Pata
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Dale Vimalachandran
- Department of Molecular & Cancer Medicine, Institute of Cancer Medicine, University of Liverpool, Liverpool, UK
- Department of Colorectal Surgery, Countess of Chester Hospital NHS Foundation Trust, Chester, UK
| | - Ian R Daniels
- Department of Colorectal Surgery, Royal Devon University Healthcare Foundation Trust, Exeter, UK
| | - Frank D McDermott
- Department of Colorectal Surgery, Royal Devon University Healthcare Foundation Trust, Exeter, UK
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Ma W, Wang Y, Nguyen LH, Mehta RS, Ha J, Bhosle A, Mclver LJ, Song M, Clish CB, Strate LL, Huttenhower C, Chan AT. Gut microbiome composition and metabolic activity in women with diverticulitis. Nat Commun 2024; 15:3612. [PMID: 38684664 PMCID: PMC11059386 DOI: 10.1038/s41467-024-47859-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 04/11/2024] [Indexed: 05/02/2024] Open
Abstract
The etiopathogenesis of diverticulitis, among the most common gastrointestinal diagnoses, remains largely unknown. By leveraging stool collected within a large prospective cohort, we performed shotgun metagenomic sequencing and untargeted metabolomics profiling among 121 women diagnosed with diverticulitis requiring antibiotics or hospitalizations (cases), matched to 121 women without diverticulitis (controls) according to age and race. Overall microbial community structure and metabolomic profiles differed in diverticulitis cases compared to controls, including enrichment of pro-inflammatory Ruminococcus gnavus, 1,7-dimethyluric acid, and histidine-related metabolites, and depletion of butyrate-producing bacteria and anti-inflammatory ceramides. Through integrated multi-omic analysis, we detected covarying microbial and metabolic features, such as Bilophila wadsworthia and bile acids, specific to diverticulitis. Additionally, we observed that microbial composition modulated the protective association between a prudent fiber-rich diet and diverticulitis. Our findings offer insights into the perturbations in inflammation-related microbial and metabolic signatures associated with diverticulitis, supporting the potential of microbial-based diagnostics and therapeutic targets.
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Affiliation(s)
- Wenjie Ma
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Yiqing Wang
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Long H Nguyen
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Raaj S Mehta
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Jane Ha
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Amrisha Bhosle
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Lauren J Mclver
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Mingyang Song
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Clary B Clish
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Lisa L Strate
- Division of Gastroenterology, University of Washington School of Medicine, Seattle, WA, USA
| | - Curtis Huttenhower
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Andrew T Chan
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
- Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
- Cancer Center, Massachusetts General Hospital, Boston, MA, USA.
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
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3
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Marasco G, Buttitta F, Cremon C, Barbaro MR, Stanghellini V, Barbara G. The role of microbiota and its modulation in colonic diverticular disease. Neurogastroenterol Motil 2023; 35:e14615. [PMID: 37243442 DOI: 10.1111/nmo.14615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/06/2023] [Accepted: 05/14/2023] [Indexed: 05/28/2023]
Abstract
BACKGROUND Diverticular disease (DD) is a common condition in Western countries. The role of microbiota in the pathogenesis of DD and its related symptoms has been frequently postulated since most complications of this disease are bacteria-driven and most therapies rely on microbiota modulation. Preliminary data showed fecal microbial imbalance in patients with DD, particularly when symptomatic, with an increase of pro-inflammatory and potentially pathogenetic bacteria. In addition, bacterial metabolic markers can mirror specific pathways of the disease and may be even used for monitoring treatment effects. All treatments currently suggested for DD can affect microbiota structure and metabolome compositions. PURPOSE Sparse evidence is available linking gut microbiota perturbations, diverticular disease pathophysiology, and symptom development. We aimed to summarize the available knowledge on gut microbiota evaluation in diverticular disease, with a focus on symptomatic uncomplicated DD, and the relative treatment strategies.
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Affiliation(s)
- Giovanni Marasco
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- Department of Medical and Surgical Science, University of Bologna, Bologna, Italy
| | - Francesco Buttitta
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- Department of Medical and Surgical Science, University of Bologna, Bologna, Italy
| | - Cesare Cremon
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | | | - Vincenzo Stanghellini
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- Department of Medical and Surgical Science, University of Bologna, Bologna, Italy
| | - Giovanni Barbara
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- Department of Medical and Surgical Science, University of Bologna, Bologna, Italy
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4
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Cameron R, Duncanson K, Hoedt EC, Eslick GD, Burns GL, Nieva C, Keely S, Walker MM, Talley NJ. Does the microbiome play a role in the pathogenesis of colonic diverticular disease? A systematic review. J Gastroenterol Hepatol 2023; 38:1028-1039. [PMID: 36775316 PMCID: PMC10946483 DOI: 10.1111/jgh.16142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/10/2023] [Accepted: 02/03/2023] [Indexed: 02/14/2023]
Abstract
BACKGROUND AND AIMS The role of the microbiota in diverticulosis and diverticular disease is underexplored. This systematic review aimed to assess all literature pertaining to the microbiota and metabolome associations in asymptomatic diverticulosis, symptomatic uncomplicated diverticular disease (SUDD), and diverticulitis pathophysiology. METHODS Seven databases were searched for relevant studies published up to September 28, 2022. Data were screened in Covidence and extracted to Excel. Critical appraisal was undertaken using the Newcastle Ottawa Scale for case/control studies. RESULTS Of the 413 papers screened by title and abstract, 48 full-text papers were reviewed in detail with 12 studies meeting the inclusion criteria. Overall, alpha and beta diversity were unchanged in diverticulosis; however, significant changes in alpha diversity were evident in diverticulitis. A similar Bacteroidetes to Firmicutes ratio compared with controls was reported across studies. The genus-level comparisons showed no relationship with diverticular disease. Butyrate-producing microbial species were decreased in abundance, suggesting a possible contribution to the pathogenesis of diverticular disease. Comamonas species was significantly increased in asymptomatic diverticulosis patients who later developed diverticulitis. Metabolome analysis reported significant differences in diverticulosis and SUDD, with upregulated uracil being the most consistent outcome in both. No significant differences were reported in the mycobiome. CONCLUSION Overall, there is no convincing evidence of microbial dysbiosis in colonic diverticula to suggest that the microbiota contributes to the pathogenesis of asymptomatic diverticulosis, SUDD, or diverticular disease. Future research investigating microbiota involvement in colonic diverticula should consider an investigation of mucosa-associated microbial changes within the colonic diverticulum itself.
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Affiliation(s)
- Raquel Cameron
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and WellbeingUniversity of NewcastleNewcastleNSWAustralia
- NHMRC Centre for Research Excellence in Digestive HealthUniversity of NewcastleNewcastleNSWAustralia
- Australian Gastrointestinal Research Alliance (AGIRA)NewcastleAustralia
- Immune Health Research ProgramHunter Medical Research InstituteNewcastleAustralia
| | - Kerith Duncanson
- School of Medicine and Public Health, College of Health, Medicine and WellbeingUniversity of NewcastleNewcastleNSWAustralia
- NHMRC Centre for Research Excellence in Digestive HealthUniversity of NewcastleNewcastleNSWAustralia
- Australian Gastrointestinal Research Alliance (AGIRA)NewcastleAustralia
- Immune Health Research ProgramHunter Medical Research InstituteNewcastleAustralia
| | - Emily C Hoedt
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and WellbeingUniversity of NewcastleNewcastleNSWAustralia
- NHMRC Centre for Research Excellence in Digestive HealthUniversity of NewcastleNewcastleNSWAustralia
- Australian Gastrointestinal Research Alliance (AGIRA)NewcastleAustralia
- Immune Health Research ProgramHunter Medical Research InstituteNewcastleAustralia
| | - Guy D Eslick
- NHMRC Centre for Research Excellence in Digestive HealthUniversity of NewcastleNewcastleNSWAustralia
- Australian Gastrointestinal Research Alliance (AGIRA)NewcastleAustralia
- Immune Health Research ProgramHunter Medical Research InstituteNewcastleAustralia
| | - Grace L Burns
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and WellbeingUniversity of NewcastleNewcastleNSWAustralia
- NHMRC Centre for Research Excellence in Digestive HealthUniversity of NewcastleNewcastleNSWAustralia
- Australian Gastrointestinal Research Alliance (AGIRA)NewcastleAustralia
- Immune Health Research ProgramHunter Medical Research InstituteNewcastleAustralia
| | - Cheenie Nieva
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and WellbeingUniversity of NewcastleNewcastleNSWAustralia
- NHMRC Centre for Research Excellence in Digestive HealthUniversity of NewcastleNewcastleNSWAustralia
- Australian Gastrointestinal Research Alliance (AGIRA)NewcastleAustralia
- Immune Health Research ProgramHunter Medical Research InstituteNewcastleAustralia
| | - Simon Keely
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and WellbeingUniversity of NewcastleNewcastleNSWAustralia
- NHMRC Centre for Research Excellence in Digestive HealthUniversity of NewcastleNewcastleNSWAustralia
- Australian Gastrointestinal Research Alliance (AGIRA)NewcastleAustralia
- Immune Health Research ProgramHunter Medical Research InstituteNewcastleAustralia
| | - Marjorie M Walker
- School of Medicine and Public Health, College of Health, Medicine and WellbeingUniversity of NewcastleNewcastleNSWAustralia
- NHMRC Centre for Research Excellence in Digestive HealthUniversity of NewcastleNewcastleNSWAustralia
- Australian Gastrointestinal Research Alliance (AGIRA)NewcastleAustralia
- Immune Health Research ProgramHunter Medical Research InstituteNewcastleAustralia
| | - Nicholas J Talley
- School of Medicine and Public Health, College of Health, Medicine and WellbeingUniversity of NewcastleNewcastleNSWAustralia
- NHMRC Centre for Research Excellence in Digestive HealthUniversity of NewcastleNewcastleNSWAustralia
- Australian Gastrointestinal Research Alliance (AGIRA)NewcastleAustralia
- Immune Health Research ProgramHunter Medical Research InstituteNewcastleAustralia
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5
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Roberson JL, Maguire LM. Does Alteration of the Microbiome Cause Diverticular Disease? Clin Colon Rectal Surg 2023; 36:146-150. [PMID: 36844710 PMCID: PMC9946712 DOI: 10.1055/s-0042-1760676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The role of the microbiome in influencing the development and course of human disease is increasingly understood and appreciated. In diverticular disease, the microbiome presents an intriguing potential link between the disease and its long-established risk factors, dietary fiber and industrialization. However, current data have yet to demonstrate a clear link between specific alterations in the microbiome and diverticular disease. The largest study of diverticulosis is negative and studies of diverticulitis are small and heterogeneous. Although multiple disease-specific hurdles exist, the early state of the current research and the many un- or underexplored clinical phenotypes present a significant opportunity for investigators to improve our knowledge of this common and incompletely understood disease.
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Affiliation(s)
- Jeffrey L. Roberson
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Lillias M. Maguire
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
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6
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Laursen ASD, Jensen BW, Strate LL, Sørensen TIA, Baker JL, Sørensen HT. Birth weight, childhood body mass index, and risk of diverticular disease in adulthood. Int J Obes (Lond) 2023; 47:207-214. [PMID: 36698028 DOI: 10.1038/s41366-023-01259-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 01/05/2023] [Accepted: 01/11/2023] [Indexed: 01/26/2023]
Abstract
OBJECTIVE Adult overweight is associated with increased risk of diverticular disease (DD). We investigated associations between birthweight and childhood body mass index (BMI) and DD. METHODS Cohort study of 346,586 persons born during 1930-1996 with records in the Copenhagen School Health Records Register. Data included birthweight, and height and weight from ages 7 through 13. We used Cox proportional hazard regression to examine associations between birthweight and BMI z-scores and DD registered in the Danish National Patient Registry. Due to non-proportionality, we followed participants from age 18-49 and from age 50. RESULTS During follow-up, 5459 (3.2%) women and 4429 (2.5%) men had DD. For low and high BMI in childhood, we observed a higher risk of DD before age 50. Among women with z-scores <0 at age 13, the hazard ratio (HR) was 1.16 [95% confidence interval (CI): 0.98-1.39] per one-point lower z-score. For z-scores ≥0 at age 13, the HR was 1.30 (95% CI: 1.11-1.51) per one-point higher z-score. Among men with z-scores <0 at age 13, the HR was 1.02 (95% CI: 0.85-1.22). For z-scores ≥0 at age 13, the HR was 1.54 (95% CI: 1.34-1.78). Z-scores ≥0 were not associated with DD after age 50. Among women only, birthweight was inversely associated with DD before age 50 [HR = 0.90 (95% CI: 0.83-0.99) per 500 g higher birthweight]. CONCLUSION BMI z-scores below and above zero in childhood were associated with higher risk of DD before age 50. In addition, we observed lower risk of DD among women, the higher their birthweight.
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Affiliation(s)
- Anne Sofie D Laursen
- Department of Clinical Medicine, Department of Clinical Epidemiology, Aarhus University and Aarhus University Hospital, Aarhus, Denmark.
| | - Britt W Jensen
- Center for Clinical Research and Prevention, Copenhagen University Hospital-Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Lisa L Strate
- Division of Gastroenterology, University of Washington School of Medicine, Seattle, WA, USA
| | - Thorkild I A Sørensen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Genomic Physiology and Translation Program, Faculty of Health and Medical Sciences, Copenhagen, Denmark
- Department of Public Health, Section of Epidemiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jennifer L Baker
- Center for Clinical Research and Prevention, Copenhagen University Hospital-Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Henrik T Sørensen
- Department of Clinical Medicine, Department of Clinical Epidemiology, Aarhus University and Aarhus University Hospital, Aarhus, Denmark
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7
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Piccin A, Gulotta M, di Bella S, Martingano P, Crocè LS, Giuffrè M. Diverticular Disease and Rifaximin: An Evidence-Based Review. Antibiotics (Basel) 2023; 12:antibiotics12030443. [PMID: 36978310 PMCID: PMC10044695 DOI: 10.3390/antibiotics12030443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
There have been considerable advances in the treatment of diverticular disease in recent years. Antibiotics are frequently used to treat symptoms and prevent complications. Rifaximin, a non-absorbable antibiotic, is a common therapeutic choice for symptomatic diverticular disease in various countries, including Italy. Because of its low systemic absorption and high concentration in stools, it is an excellent medicine for targeting the gastrointestinal tract, where it has a beneficial effect in addition to its antibacterial properties. Current evidence shows that cyclical rifaximin usage in conjunction with a high-fiber diet is safe and effective for treating symptomatic uncomplicated diverticular disease, while the cost-effectiveness of long-term treatment is unknown. The use of rifaximin to prevent recurrent diverticulitis is promising, but further studies are needed to confirm its therapeutic benefit. Unfortunately, there is no available evidence on the efficacy of rifaximin treatment for acute uncomplicated diverticulitis.
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Affiliation(s)
- Anna Piccin
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34149 Trieste, Italy
| | - Marco Gulotta
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34149 Trieste, Italy
| | - Stefano di Bella
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34149 Trieste, Italy
- Infectious Disease Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), 34128 Trieste, Italy
| | - Paola Martingano
- Department of Radiology, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), 34128 Trieste, Italy
| | - Lory Saveria Crocè
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34149 Trieste, Italy
- Liver Clinic, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), 34128 Trieste, Italy
| | - Mauro Giuffrè
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34149 Trieste, Italy
- Department of Internal Medicine, Yale School of Medicine, Yale University, New Haven, CT 06510, USA
- Correspondence:
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Microbiota of the Colonic Diverticula in the Complicated Form of Diverticulitis: A Case Report. LIFE (BASEL, SWITZERLAND) 2022; 12:life12122129. [PMID: 36556494 PMCID: PMC9784642 DOI: 10.3390/life12122129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
Intestinal microbiota appears to be implicated in the pathogenesis of diverticular disease. We present the case of a patient with diverticular colon disease complicated by a pelvic abscess. During the successful surgical treatment, two specimens were taken from the resected colon segment for the microbiota analysis: an inflamed and perforated diverticulum and a diverticulum without signs of inflammation. Culturing and 16S rRNA gene sequencing revealed significant changes in the microbial community structure and composition associated with the acute inflammation and perforation of the colonic diverticulum. The characteristics that are usually associated with the inflammatory process in the gut, namely reduced microbial diversity and richness, decreased Firmicutes-to-Bacteroidetes (F/B) ratio, depletion of butyrate-producing bacteria, and Enterobacteriaceae blooming, were more pronounced in the non-inflamed diverticulum rather than in the adjacent inflamed and perforated one. This is the first study of the intraluminal microbiota of the diverticular pockets, which is more relevant to the etiology of diverticular disease than mucosa-associated microbiota via biopsies and luminal microbiota via fecal samples.
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9
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Mj O, Turner GA, A S, Frizelle FA, R P. Distinct changes in the colonic microbiome associated with acute diverticulitis. Colorectal Dis 2022; 24:1591-1601. [PMID: 35950499 PMCID: PMC10087140 DOI: 10.1111/codi.16271] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 07/01/2022] [Accepted: 07/07/2022] [Indexed: 01/07/2023]
Abstract
AIM The pathogenesis of acute diverticulitis (AD) remains incompletely understood, despite it being one of the most common gastrointestinal conditions worldwide. The aim of this study was to investigate the role of the colonic microbiome in the pathogenesis of AD. METHOD A prospective case-control study was performed, comparing the microbiome of AD patients with that of controls, using 16S rRNA sequencing of rectal swab samples. RESULTS The microbiome of individuals with AD showed lower diversity than that of controls. There were significant compositional differences observed, with a lower abundance of commensal bacterial families and genera such as Lachnospiraceae, Ruminococcus and Faecalibacterium in AD patients compared with controls, and there was an increase in several genera with known pathogenic roles including Fusobacteria, Prevotella and Paraprevotella. CONCLUSION This is the largest study to date to examine the microbiota of AD patients, and adds evidence to the proposed hypothesis that alterations in the colonic microbiome play a role in the pathogenesis of AD.
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Affiliation(s)
- O'Grady Mj
- Whanganui Hospital, Wanganui, New Zealand
| | - Greg A Turner
- Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Sulit A
- University of Otago, Christchurch, New Zealand
| | - Frank A Frizelle
- University of Otago, Christchurch, New Zealand.,Christchurch Hospital, Christchurch, New Zealand
| | - Purcell R
- University of Otago, Christchurch, New Zealand
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10
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Tursi A, Papa V, Lopetuso LR, Settanni CR, Gasbarrini A, Papa A. Microbiota Composition in Diverticular Disease: Implications for Therapy. Int J Mol Sci 2022; 23:ijms232314799. [PMID: 36499127 PMCID: PMC9736941 DOI: 10.3390/ijms232314799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 12/05/2022] Open
Abstract
Gut microbiota (GM) composition and its imbalance are crucial in the pathogenesis of several diseases, mainly those affecting the gastrointestinal tract. Colon diverticulosis and its clinical manifestations (diverticular disease, DD) are among the most common digestive disorders in developed countries. In recent literature, the role of GM imbalance in the onset of the different manifestations within the clinical spectrum of DD has been highlighted. This narrative review aims to summarize and critically analyze the current knowledge on GM dysbiosis in diverticulosis and DD by comparing the available data with those found in inflammatory bowel disease (IBD). The rationale for using probiotics to rebalance dysbiosis in DD is also discussed.
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Affiliation(s)
- Antonio Tursi
- Territorial Gastroenterology Service, ASL BAT, 70031 Andria, Italy
- Department of Translational Medicine and Surgery, School of Medicine, Catholic University, 00168 Rome, Italy
| | - Valerio Papa
- Department of Translational Medicine and Surgery, School of Medicine, Catholic University, 00168 Rome, Italy
- Digestive Surgery, Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, 00168 Rome, Italy
| | - Loris Riccardo Lopetuso
- Center for Diagnosis and Treatment of Digestive Diseases, CEMAD, Gastroenterology Department, Fondazione Policlinico Gemelli, IRCCS, 00168 Rome, Italy
- Department of Medicine and Ageing Sciences, “G. d’Annunzio” University of Chieti-Pescara, 66100 Chieti, Italy
- Center for Advanced Studies and Technology (CAST), “G. d’Annunzio” University of Chieti-Pescara, 66100 Chieti, Italy
| | - Carlo Romano Settanni
- Center for Diagnosis and Treatment of Digestive Diseases, CEMAD, Gastroenterology Department, Fondazione Policlinico Gemelli, IRCCS, 00168 Rome, Italy
| | - Antonio Gasbarrini
- Department of Translational Medicine and Surgery, School of Medicine, Catholic University, 00168 Rome, Italy
- Center for Diagnosis and Treatment of Digestive Diseases, CEMAD, Gastroenterology Department, Fondazione Policlinico Gemelli, IRCCS, 00168 Rome, Italy
| | - Alfredo Papa
- Department of Translational Medicine and Surgery, School of Medicine, Catholic University, 00168 Rome, Italy
- Center for Diagnosis and Treatment of Digestive Diseases, CEMAD, Gastroenterology Department, Fondazione Policlinico Gemelli, IRCCS, 00168 Rome, Italy
- Correspondence: ; Tel.: +39-06-30157781
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11
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Pathophysiology of Diverticular Disease: From Diverticula Formation to Symptom Generation. Int J Mol Sci 2022; 23:ijms23126698. [PMID: 35743141 PMCID: PMC9223421 DOI: 10.3390/ijms23126698] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/13/2022] [Accepted: 06/13/2022] [Indexed: 01/04/2023] Open
Abstract
Diverticular disease is a common clinical problem, particularly in industrialized countries. In most cases, colonic diverticula remain asymptomatic throughout life and sometimes are found incidentally during colonic imaging in colorectal cancer screening programs in otherwise healthy subjects. Nonetheless, roughly 25% of patients bearing colonic diverticula develop clinical manifestations. Abdominal symptoms associated with diverticula in the absence of inflammation or complications are termed symptomatic uncomplicated diverticular disease (SUDD). The pathophysiology of diverticular disease as well as the mechanisms involved in the shift from an asymptomatic condition to a symptomatic one is still poorly understood. It is accepted that both genetic factors and environment, as well as intestinal microenvironment alterations, have a role in diverticula development and in the different phenotypic expressions of diverticular disease. In the present review, we will summarize the up-to-date knowledge on the pathophysiology of diverticula and their different clinical setting, including diverticulosis and SUDD.
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