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Rykalo N, Riehl L, Kress M. The gut microbiome and the brain. Curr Opin Support Palliat Care 2024:01263393-990000000-00087. [PMID: 39250732 DOI: 10.1097/spc.0000000000000717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/11/2024]
Abstract
PURPOSE OF REVIEW The importance of the gut microbiome for human health and well-being is generally accepted, and elucidating the signaling pathways between the gut microbiome and the host offers novel mechanistic insight into the (patho)physiology and multifaceted aspects of healthy aging and human brain functions. RECENT FINDINGS The gut microbiome is tightly linked with the nervous system, and gut microbiota are increasingly emerging as important regulators of emotional and cognitive performance. They send and receive signals for the bidirectional communication between gut and brain via immunological, neuroanatomical, and humoral pathways. The composition of the gut microbiota and the spectrum of metabolites and neurotransmitters that they release changes with increasing age, nutrition, hypoxia, and other pathological conditions. Changes in gut microbiota (dysbiosis) are associated with critical illnesses such as cancer, cardiovascular, and chronic kidney disease but also neurological, mental, and pain disorders, as well as chemotherapies and antibiotics affecting brain development and function. SUMMARY Dysbiosis and a concomitant imbalance of mediators are increasingly emerging both as causes and consequences of diseases affecting the brain. Understanding the microbiota's role in the pathogenesis of these disorders will have major clinical implications and offer new opportunities for therapeutic interventions.
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Affiliation(s)
- Nadiia Rykalo
- Department of Physiology and Medical Physics, Institute of Physiology, Medical University Innsbruck, Austria
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Iloki Assanga SB, Lewis Luján LM, McCarty MF. Targeting beta-catenin signaling for prevention of colorectal cancer - Nutraceutical, drug, and dietary options. Eur J Pharmacol 2023; 956:175898. [PMID: 37481200 DOI: 10.1016/j.ejphar.2023.175898] [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: 03/11/2023] [Revised: 06/09/2023] [Accepted: 06/29/2023] [Indexed: 07/24/2023]
Abstract
Progressive up-regulation of β-catenin signaling is very common in the transformation of colorectal epithelium to colorectal cancer (CRC). Practical measures for opposing such signaling hence have potential for preventing or slowing such transformation. cAMP/PKA activity in colon epithelium, as stimulated by COX-2-generated prostaglandins and β2-adrenergic signaling, boosts β-catenin activity, whereas cGMP/PKG signaling has the opposite effect. Bacterial generation of short-chain fatty acids (as supported by unrefined high-carbohydrate diets, berberine, and probiotics), dietary calcium, daily aspirin, antioxidants opposing cox-2 induction, and nicotine avoidance, can suppress cAMP production in colonic epithelium, whereas cGMP can be boosted via linaclotides, PDE5 inhibitors such as sildenafil or icariin, and likely high-dose biotin. Selective activation of estrogen receptor-β by soy isoflavones, support of adequate vitamin D receptor activity with UV exposure or supplemental vitamin D, and inhibition of CK2 activity with flavanols such as quercetin, can also oppose β-catenin signaling in colorectal epithelium. Secondary bile acids, the colonic production of which can be diminished by low-fat diets and berberine, can up-regulate β-catenin activity by down-regulating farnesoid X receptor expression. Stimulation of PI3K/Akt via insulin, IGF-I, TLR4, and EGFR receptors boosts β-catenin levels via inhibition of glycogen synthase-3β; plant-based diets can down-regulate insulin and IGF-I levels, exercise training and leanness can keep insulin low, anthocyanins and their key metabolite ferulic acid have potential for opposing TLR4 signaling, and silibinin is a direct antagonist for EGFR. Partially hydrolyzed phytate can oppose growth factor-mediated down-regulation of β-catenin by inhibiting Akt activation. Multifactorial strategies for safely opposing β-catenin signaling can be complemented with measures that diminish colonic mutagenesis and DNA hypomethylation - such as avoidance of heme-rich meat and charred or processed meats, consumption of phase II-inductive foods and nutraceuticals (e.g., Crucifera), and assurance of adequate folate status.
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Affiliation(s)
- Simon Bernard Iloki Assanga
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Blvd Luis Encinas y Rosales S/N Col. Centro, Hermosillo, Sonora, C.P. 83000, Mexico.
| | - Lidianys María Lewis Luján
- Technological Institute of Hermosillo (ITH), Ave. Tecnológico y Periférico Poniente S/N, Col. Sahuaro, Hermosillo, Sonora, C.P. 83170, México.
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Volmer JG, McRae H, Morrison M. The evolving role of methanogenic archaea in mammalian microbiomes. Front Microbiol 2023; 14:1268451. [PMID: 37727289 PMCID: PMC10506414 DOI: 10.3389/fmicb.2023.1268451] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 08/18/2023] [Indexed: 09/21/2023] Open
Abstract
Methanogenic archaea (methanogens) represent a diverse group of microorganisms that inhabit various environmental and host-associated microbiomes. These organisms play an essential role in global carbon cycling given their ability to produce methane, a potent greenhouse gas, as a by-product of their energy production. Recent advances in culture-independent and -dependent studies have highlighted an increased prevalence of methanogens in the host-associated microbiome of diverse animal species. Moreover, there is increasing evidence that methanogens, and/or the methane they produce, may play a substantial role in human health and disease. This review addresses the expanding host-range and the emerging view of host-specific adaptations in methanogen biology and ecology, and the implications for host health and disease.
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Affiliation(s)
- James G. Volmer
- Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, QLD, Australia
| | - Harley McRae
- Faculty of Medicine, University of Queensland Frazer Institute, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Mark Morrison
- Faculty of Medicine, University of Queensland Frazer Institute, Translational Research Institute, Woolloongabba, QLD, Australia
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Aminawung JA, Soulos PR, Oladeru OT, Lin H, Gonsalves L, Puglisi LB, Hassan S, Richman IB, Wang EA, Gross CP. Cancer incidence among incarcerated and formerly incarcerated individuals: A statewide retrospective cohort study. Cancer Med 2023; 12:15447-15454. [PMID: 37248772 PMCID: PMC10417084 DOI: 10.1002/cam4.6162] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/31/2023] [Accepted: 05/17/2023] [Indexed: 05/31/2023] Open
Abstract
BACKGROUND Cancer incidence among individuals with incarceration exposure has been rarely studied due to the absence of linked datasets. This study examined cancer incidence during incarceration and postincarceration compared to the general population using a statewide linked cohort. METHODS We constructed a retrospective cohort from a linkage of state tumor registry and correctional system data for Connecticut residents from 2005 to 2016, and identified cancers diagnosed during and within 12 months postincarceration. We estimated incidence rates (including for screen-detectable cancers) and calculated the standardized incidence ratios (SIR) for the incarcerated and recently released populations, relative to the general population. We also examined cancer incidence by race and ethnicity within each group. RESULTS Cancer incidence was lower in incarcerated individuals (SIR = 0.64, 95% CI 0.56-0.72), but higher in recently released individuals (SIR = 1.34, 95% CI 1.23-1.47) compared with the general population, and across all race and ethnic strata. Similarly, nonscreen-detectable cancer incidence was lower in incarcerated and higher in recently released populations compared to the general population. However, non-Hispanic Black individuals had elevated incidence of screen-detectable cancers compared with non-Hispanic White individuals across all three populations (incarcerated, SIR = 1.66, 95% CI 1.03-2.53; recently released, SIR = 1.83, 95% CI 1.32-2.47; and general population, SIR = 1.18, 95% CI 1.16-1.21). CONCLUSION Compared with the general population, incarcerated persons have a lower cancer incidence, whereas recently released persons have a higher cancer incidence. Irrespective of incarceration status, non-Hispanic Black individuals have a higher incidence of screen-detectable cancers compared with non-Hispanic White individuals. Supplemental studies examining cancer screening and diagnoses during incarceration are needed to discern the reasons for observed disparities in incidence.
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Affiliation(s)
- Jenerius A. Aminawung
- Department of Internal Medicine, SEICHE Center for Health and JusticeYale School of MedicineNew HavenConnecticutUSA
- Department of Internal Medicine, Cancer Outcomes, Public Policy, and Effectiveness Research (COPPER) CenterYale School of MedicineNew HavenConnecticutUSA
| | - Pamela R. Soulos
- Department of Internal Medicine, Cancer Outcomes, Public Policy, and Effectiveness Research (COPPER) CenterYale School of MedicineNew HavenConnecticutUSA
| | | | - Hsiu‐Ju Lin
- School of Social WorkUniversity of ConnecticutHartfordConnecticutUSA
- Research DivisionConnecticut Department of Mental Health and Addiction ServicesHartfordConnecticutUSA
| | - Lou Gonsalves
- Connecticut Tumor Registry, Connecticut Department of Public HealthHartfordConnecticutUSA
| | - Lisa B. Puglisi
- Department of Internal Medicine, SEICHE Center for Health and JusticeYale School of MedicineNew HavenConnecticutUSA
| | - Sirad Hassan
- Department of Internal Medicine, Cancer Outcomes, Public Policy, and Effectiveness Research (COPPER) CenterYale School of MedicineNew HavenConnecticutUSA
| | - Ilana B. Richman
- Department of Internal Medicine, Cancer Outcomes, Public Policy, and Effectiveness Research (COPPER) CenterYale School of MedicineNew HavenConnecticutUSA
| | - Emily A. Wang
- Department of Internal Medicine, SEICHE Center for Health and JusticeYale School of MedicineNew HavenConnecticutUSA
| | - Cary P. Gross
- Department of Internal Medicine, Cancer Outcomes, Public Policy, and Effectiveness Research (COPPER) CenterYale School of MedicineNew HavenConnecticutUSA
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Mawson AR. Understanding health disparities affecting people of West Central African descent in the United States: An evolutionary perspective. Evol Appl 2023; 16:963-978. [PMID: 37216026 PMCID: PMC10197229 DOI: 10.1111/eva.13549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/19/2023] [Accepted: 04/02/2023] [Indexed: 05/24/2023] Open
Abstract
Human populations adapting to diverse aspects of their environment such as climate and pathogens leave signatures of genetic variation. This principle may apply to people of West Central African descent in the United States, who are at increased risk of certain chronic conditions and diseases compared to their European counterparts. Less well known is that they are also at reduced risk of other diseases. While discriminatory practices in the United States continue to affect access to and the quality of healthcare, the health disparities affecting African Americans may also be due in part to evolutionary adaptations to the original environment of sub-Saharan Africa, which involved continuous exposure to the vectors of potentially lethal endemic tropical diseases. Evidence is presented that these organisms selectively absorb vitamin A from the host, and its use in parasite reproduction contributes to the signs and symptoms of the respective diseases. These evolutionary adaptations included (1) sequestering vitamin A away from the liver to other organs, to reduce accessibility to the invaders; and (2) reducing the metabolism and catabolism of vitamin A (vA), causing it to accumulate to subtoxic concentrations and weaken the organisms, thereby reducing the risk of severe disease. However, in the environment of North America, lacking vA-absorbing parasites and with a mainly dairy-based diet that is high in vA, this combination of factors is hypothesized to lead to the accumulation of vA and to increased sensitivity to vA as a toxin, which contribute to the health disparities affecting African Americans. vA toxicity is linked to numerous acute and chronic conditions via mitochondrial dysfunction and apoptosis. Subject to testing, the hypothesis suggests that the adoption of traditional or modified West Central African-style diets that are low in vA and high in vA-absorbing fiber hold promise for disease prevention and treatment, and as a population-based strategy for health maintenance and longevity.
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Affiliation(s)
- Anthony R. Mawson
- Department of Epidemiology and Biostatistics, School of Public Health, College of Health SciencesJackson State UniversityJacksonMississippiUSA
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Fan N, Fusco JL, Rosenberg DW. Antioxidant and Anti-Inflammatory Properties of Walnut Constituents: Focus on Personalized Cancer Prevention and the Microbiome. Antioxidants (Basel) 2023; 12:982. [PMID: 37237848 PMCID: PMC10215340 DOI: 10.3390/antiox12050982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/13/2023] [Accepted: 04/18/2023] [Indexed: 05/28/2023] Open
Abstract
Walnuts have been lauded as a 'superfood', containing a remarkable array of natural constituents that may have additive and/or synergistic properties that contribute to reduced cancer risk. Walnuts are a rich source of polyunsaturated fatty acids (PUFAs: alpha-linolenic acid, ALA), tocopherols, antioxidant polyphenols (including ellagitannins), and prebiotics, including fiber (2 g/oz). There is a growing body of evidence that walnuts may contribute in a positive way to the gut microbiome, having a prebiotic potential that promotes the growth of beneficial bacteria. Studies supporting this microbiome-modifying potential include both preclinical cancer models as well as several promising human clinical trials. Mediated both directly and indirectly via its actions on the microbiome, many of the beneficial properties of walnuts are related to a range of anti-inflammatory properties, including powerful effects on the immune system. Among the most potent constituents of walnuts are the ellagitannins, primarily pedunculagin. After ingestion, the ellagitannins are hydrolyzed at low pH to release ellagic acid (EA), a non-flavonoid polyphenolic that is subsequently metabolized by the microbiota to the bioactive urolithins (hydroxydibenzo[b,d]pyran-6-ones). Several urolithins, including urolithin A, reportedly have potent anti-inflammatory properties. These properties of walnuts provide the rationale for including this tree nut as part of a healthy diet for reducing overall disease risk, including colorectal cancer. This review considers the latest information regarding the potential anti-cancer and antioxidant properties of walnuts and how they may be incorporated into the diet to provide additional health benefits.
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Affiliation(s)
| | | | - Daniel W. Rosenberg
- Center for Molecular Oncology, University of Connecticut Health Center, Farmington, CT 06030-3101, USA
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Niekamp P, Kim CH. Microbial Metabolite Dysbiosis and Colorectal Cancer. Gut Liver 2023; 17:190-203. [PMID: 36632785 PMCID: PMC10018301 DOI: 10.5009/gnl220260] [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: 06/17/2022] [Revised: 08/09/2022] [Accepted: 08/18/2022] [Indexed: 01/13/2023] Open
Abstract
The global burden of colorectal cancer (CRC) is expected to continuously increase. Through research performed in the past decades, the effects of various environmental factors on CRC development have been well identified. Diet, the gut microbiota and their metabolites are key environmental factors that profoundly affect CRC development. Major microbial metabolites with a relevance for CRC prevention and pathogenesis include dietary fiber-derived short-chain fatty acids, bile acid derivatives, indole metabolites, polyamines, trimethylamine-N-oxide, formate, and hydrogen sulfide. These metabolites regulate various cell types in the intestine, leading to an altered intestinal barrier, immunity, chronic inflammation, and tumorigenesis. The physical, chemical, and metabolic properties of these metabolites along with their distinct functions to trigger host receptors appear to largely determine their effects in regulating CRC development. In this review, we will discuss the current advances in our understanding of the major CRC-regulating microbial metabolites, focusing on their production and interactive effects on immune responses and tumorigenesis in the colon.
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Affiliation(s)
- Patrick Niekamp
- Department of Pathology and Mary H. Weiser Food Allergy Center, Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Chang H. Kim
- Department of Pathology and Mary H. Weiser Food Allergy Center, Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, MI, USA
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Wang Y, Uffelman CN, Bergia RE, Clark CM, Reed JB, Cross TWL, Lindemann SR, Tang M, Campbell WW. Meat Consumption and Gut Microbiota: a Scoping Review of Literature and Systematic Review of Randomized Controlled Trials in Adults. Adv Nutr 2023; 14:215-237. [PMID: 36822879 PMCID: PMC10229385 DOI: 10.1016/j.advnut.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 09/27/2022] [Accepted: 10/05/2022] [Indexed: 12/23/2022] Open
Abstract
Emerging research indicates the importance of gut microbiota in mediating the relationship between meat intake and human health outcomes. We aimed to assess the state of available scientific literature on meat intake and gut microbiota in humans (PROSPERO, International Prospective Register of Systematic Reviews, CRD42020135649). We first conducted a scoping review to identify observational and interventional studies on this topic. Searches were performed for English language articles using PubMed, Cochrane Library, Scopus, and CINAHL (Cumulated Index to Nursing and Allied Health Literature) databases from inception to August 2021 and using keywords related to meat (inclusive of mammalian, avian, and aquatic subtypes) and gut microbiota. Of 14,680 records, 85 eligible articles were included in the scoping review, comprising 57 observational and 28 interventional studies. One prospective observational study and 13 randomized controlled trials (RCTs) were identified in adults without diagnosed disease. We included the 13 RCTs, comprising 18 comparisons, in the systematic review to assess the effects of higher and lower intakes of total meat and meat subtypes on the gut microbiota composition. The bacterial composition was differentially affected by consuming diets with and without meat or with varied meat subtypes. For example, higher meat intake tended to decrease population sizes of genera Anerostipes and Faecalibacterium, but it increased the population size of Roseburia across studies. However, the magnitude and directionality of most microbial responses varied, with inconsistent patterns of responses across studies. The data were insufficient for comparison within or between meat subtypes. The paucity of research, especially among meat subtypes, and heterogeneity of findings underscore the need for more well-designed prospective studies and full-feeding RCTs to address the relationships between and effects of consuming total meat and meat subtypes on gut microbiota, respectively.
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Affiliation(s)
- Yu Wang
- Department of Nutrition Science, Purdue University, West Lafayette, IN, USA
| | - Cassi N Uffelman
- Department of Nutrition Science, Purdue University, West Lafayette, IN, USA
| | - Robert E Bergia
- Department of Nutrition Science, Purdue University, West Lafayette, IN, USA
| | - Caroline M Clark
- Department of Nutrition Science, Purdue University, West Lafayette, IN, USA
| | - Jason B Reed
- Libraries and School of Information Studies, Purdue University, West Lafayette, IN, USA
| | - Tzu-Wen L Cross
- Department of Nutrition Science, Purdue University, West Lafayette, IN, USA
| | | | - Minghua Tang
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Wayne W Campbell
- Department of Nutrition Science, Purdue University, West Lafayette, IN, USA.
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9
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Chimonanthus nitens Oliv Polysaccharides Modulate Immunity and Gut Microbiota in Immunocompromised Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2023; 2023:6208680. [PMID: 36846714 PMCID: PMC9946750 DOI: 10.1155/2023/6208680] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 01/15/2023] [Accepted: 01/20/2023] [Indexed: 02/17/2023]
Abstract
To investigate the immunomodulatory activities of Chimonanthus nitens Oliv polysaccharides (COP1), an immunosuppressive mouse model was generated by cyclophosphamide (CY) administration and then treated with COP1. The results demonstrated that COP1 ameliorated the body weight and immune organ (spleen and thymus) index of mice and improved the pathological changes of the spleen and ileum induced by CY. COP1 strongly stimulated the production of inflammatory cytokines (IL-10, IL-12, IL-17, IL-1β, and TNF-α) of the spleen and ileum by promoting the mRNA expressions. Furthermore, COP1 had immunomodulatory activity by increasing several transcription factors (JNK, ERK, and P38) in the mitogen-activated protein kinase (MAPK) signaling pathway. Related to the above immune stimulatory effects, COP1 positively affected the production of short-chain fatty acids (SCFAs) and the expression of ileum tight junction (TJ) protein (ZO-1, Occludin-1, and Claudin-1), upregulated the level of secretory immunoglobulin A (SIgA) in the ileum and microbiota diversity and composition, and improved intestinal barrier function. This study suggests that COP1 may provide an alternative strategy for alleviating chemotherapy-induced immunosuppression.
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Carson TL, Buro AW, Miller D, Peña A, Ard JD, Lampe JW, Yi N, Lefkowitz E, William VDP, Morrow C, Wilson L, Barnes S, Demark-Wahnefried W. Rationale and study protocol for a randomized controlled feeding study to determine the structural- and functional-level effects of diet-specific interventions on the gut microbiota of non-Hispanic black and white adults. Contemp Clin Trials 2022; 123:106968. [PMID: 36265810 PMCID: PMC10095329 DOI: 10.1016/j.cct.2022.106968] [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: 04/27/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 01/27/2023]
Abstract
BACKGROUND Colorectal cancer (CRC), the third leading cause of cancer-related deaths in the US, has been associated with an overrepresentation or paucity of several microbial taxa in the gut microbiota, but causality has not been established. Black men and women have among the highest CRC incidence and mortality rates of any racial/ethnic group. This study will examine the impact of the Dietary Approaches to Stop Hypertension (DASH) diet on gut microbiota and fecal metabolites associated with CRC risk. METHODS A generally healthy sample of non-Hispanic Black and white adults (n = 112) is being recruited to participate in a parallel-arm randomized controlled feeding study. Participants are randomized to receive the DASH diet or a standard American diet for a 28-day period. Fecal samples are collected weekly throughout the study to analyze changes in the gut microbiota using 16 s rRNA and selected metagenomics. Differences in bacterial alpha and beta diversity and taxa that have been associated with CRC (Bacteroides, Fusobacterium, Clostridium, Lactobacillus, Bifidobacterium, Ruminococcus, Porphyromonas, Succinivibrio) are being evaluated. Covariate measures include body mass index, comorbidities, medication history, physical activity, stress, and demographic characteristics. CONCLUSION Our findings will provide preliminary evidence for the DASH diet as an approach for cultivating a healthier gut microbiota across non-Hispanic Black and non-Hispanic White adults. These results can impact clinical, translational, and population-level approaches for modification of the gut microbiota to reduce risk of chronic diseases including CRC. TRIAL REGISTRATION This study was registered on ClinicalTrials.gov, identifier NCT04538482, on September 4, 2020 (https://clinicaltrials.gov/ct2/show/NCT04538482).
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Affiliation(s)
- Tiffany L Carson
- Department of Health Outcomes and Behavior, Moffitt Cancer Center, Tampa, FL, United States of America.
| | - Acadia W Buro
- Department of Health Outcomes and Behavior, Moffitt Cancer Center, Tampa, FL, United States of America
| | - Darci Miller
- Department of Health Outcomes and Behavior, Moffitt Cancer Center, Tampa, FL, United States of America
| | - Alissa Peña
- Department of Health Outcomes and Behavior, Moffitt Cancer Center, Tampa, FL, United States of America
| | - Jamy D Ard
- Department of Epidemiology and Prevention, Wake Forest School of Medicine, Winston-Salem, NC, United States of America
| | - Johanna W Lampe
- Public Health Science Division, Fred Hutchinson Cancer Center, Seattle, WA, United States of America
| | - Nengjun Yi
- Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Elliot Lefkowitz
- Center for Clinical and Translational Sciences, University of Alabama at Birmingham, Birmingham, AL, United States of America; Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Van Der Pol William
- Center for Clinical and Translational Sciences, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Casey Morrow
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Landon Wilson
- Department of Pharmacology and Toxicology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States of America; Targeted Metabolomics and Proteomics Laboratory, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Stephen Barnes
- Department of Pharmacology and Toxicology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States of America; Targeted Metabolomics and Proteomics Laboratory, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Wendy Demark-Wahnefried
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, United States of America
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Djemai K, Drancourt M, Tidjani Alou M. Bacteria and Methanogens in the Human Microbiome: a Review of Syntrophic Interactions. MICROBIAL ECOLOGY 2022; 83:536-554. [PMID: 34169332 DOI: 10.1007/s00248-021-01796-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
Methanogens are microorganisms belonging to the Archaea domain and represent the primary source of biotic methane. Methanogens encode a series of enzymes which can convert secondary substrates into methane following three major methanogenesis pathways. Initially recognized as environmental microorganisms, methanogens have more recently been acknowledged as host-associated microorganisms after their detection and initial isolation in ruminants in the 1950s. Methanogens have also been co-detected with bacteria in various pathological situations, bringing their role as pathogens into question. Here, we review reported associations between methanogens and bacteria in physiological and pathological situations in order to understand the metabolic interactions explaining these associations. To do so, we describe the origin of the metabolites used for methanogenesis and highlight the central role of methanogens in the syntrophic process during carbon cycling. We then focus on the metabolic abilities of co-detected bacterial species described in the literature and infer from their genomes the probable mechanisms of their association with methanogens. The syntrophic interactions between bacteria and methanogens are paramount to gut homeostasis. Therefore, any dysbiosis affecting methanogens might impact human health. Thus, the monitoring of methanogens may be used as a bio-indicator of dysbiosis. Moreover, new therapeutic approaches can be developed based on their administration as probiotics. We thus insist on the importance of investigating methanogens in clinical microbiology.
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Affiliation(s)
- Kenza Djemai
- IRD, MEPHI, IHU Méditerranée Infection, Aix-Marseille-University, 19-12 Bd Jean Moulin, 13005, Marseille, France
- IHU Méditerranée Infection, Marseille, France
| | - Michel Drancourt
- IRD, MEPHI, IHU Méditerranée Infection, Aix-Marseille-University, 19-12 Bd Jean Moulin, 13005, Marseille, France
| | - Maryam Tidjani Alou
- IRD, MEPHI, IHU Méditerranée Infection, Aix-Marseille-University, 19-12 Bd Jean Moulin, 13005, Marseille, France.
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12
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Sędzikowska A, Szablewski L. Human Gut Microbiota in Health and Selected Cancers. Int J Mol Sci 2021; 22:13440. [PMID: 34948234 PMCID: PMC8708499 DOI: 10.3390/ijms222413440] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/08/2021] [Accepted: 12/10/2021] [Indexed: 12/24/2022] Open
Abstract
The majority of the epithelial surfaces of our body, and the digestive tract, respiratory and urogenital systems, are colonized by a vast number of bacteria, archaea, fungi, protozoans, and viruses. These microbiota, particularly those of the intestines, play an important, beneficial role in digestion, metabolism, and the synthesis of vitamins. Their metabolites stimulate cytokine production by the human host, which are used against potential pathogens. The composition of the microbiota is influenced by several internal and external factors, including diet, age, disease, and lifestyle. Such changes, called dysbiosis, may be involved in the development of various conditions, such as metabolic diseases, including metabolic syndrome, type 2 diabetes mellitus, Hashimoto's thyroidis and Graves' disease; they can also play a role in nervous system disturbances, such as multiple sclerosis, Alzheimer's disease, Parkinson's disease, and depression. An association has also been found between gut microbiota dysbiosis and cancer. Our health is closely associated with the state of our microbiota, and their homeostasis. The aim of this review is to describe the associations between human gut microbiota and cancer, and examine the potential role of gut microbiota in anticancer therapy.
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Affiliation(s)
| | - Leszek Szablewski
- Chair and Department of General Biology and Parasitology, Medical University of Warsaw, ul. Chalubinskiego 5, 02-004 Warsaw, Poland;
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Vitamins as Possible Cancer Biomarkers: Significance and Limitations. Nutrients 2021; 13:nu13113914. [PMID: 34836171 PMCID: PMC8622959 DOI: 10.3390/nu13113914] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/28/2021] [Accepted: 10/29/2021] [Indexed: 12/11/2022] Open
Abstract
The Western-style diet, which is common in developed countries and spreading into developing countries, is unbalanced in many respects. For instance, micronutrients (vitamins A, B complex, C, D, E, and K plus iron, zinc, selenium, and iodine) are generally depleted in Western food (causing what is known as ‘hidden hunger’), whereas some others (such as phosphorus) are added beyond the daily allowance. This imbalance in micronutrients can induce cellular damage that can increase the risk of cancer. Interestingly, there is a large body of evidence suggesting a strong correlation between vitamin intake as well as vitamin blood concentrations with the occurrence of certain types of cancer. The direction of association between the concentration of a given vitamin and cancer risk is tumor specific. The present review summarized the literature regarding vitamins and cancer risk to assess whether these could be used as diagnostic or prognostic markers, thus confirming their potential as biomarkers. Despite many studies that highlight the importance of monitoring vitamin blood or tissue concentrations in cancer patients and demonstrate the link between vitamin intake and cancer risk, there is still an urgent need for more data to assess the effectiveness of vitamins as biomarkers in the context of cancer. Therefore, this review aims to provide a solid basis to support further studies on this promising topic.
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Koller KR, Wilson A, Normolle DP, Nicholson JK, Li JV, Kinross J, Lee FR, Flanagan CA, Merculieff ZT, Iyer P, Lammers DL, Thomas TK, O'Keefe SJD. Dietary fibre to reduce colon cancer risk in Alaska Native people: the Alaska FIRST randomised clinical trial protocol. BMJ Open 2021; 11:e047162. [PMID: 34452959 PMCID: PMC8404459 DOI: 10.1136/bmjopen-2020-047162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 08/09/2021] [Indexed: 01/05/2023] Open
Abstract
INTRODUCTION Diet, shown to impact colorectal cancer (CRC) risk, is a modifiable environmental factor. Fibre foods fermented by gut microbiota produce metabolites that not only provide food for the colonic epithelium but also exert regulatory effects on colonic mucosal inflammation and proliferation. We describe methods used in a double-blinded, randomised, controlled trial with Alaska Native (AN) people to determine if dietary fibre supplementation can substantially reduce CRC risk among people with the highest reported CRC incidence worldwide. METHODS AND ANALYSES Eligible patients undergoing routine screening colonoscopy consent to baseline assessments and specimen/data collection (blood, urine, stool, saliva, breath and colon mucosal biopsies) at the time of colonoscopy. Following an 8-week stabilisation period to re-establish normal gut microbiota post colonoscopy, study personnel randomise participants to either a high fibre supplement (resistant starch, n=30) or placebo (digestible starch, n=30) condition, repeating stool sample collection. During the 28-day supplement trial, each participant consumes their usual diet plus their supplement under direct observation. On day 29, participants undergo a flexible sigmoidoscopy to obtain mucosal biopsy samples to measure the effect of the supplement on inflammatory and proliferative biomarkers of cancer risk, with follow-up assessments and data/specimen collection similar to baseline. Secondary outcome measures include the impact of a high fibre supplement on the oral and colonic microbiome and biofluid metabolome. ETHICS AND DISSEMINATION Approvals were obtained from the Alaska Area and University of Pittsburgh Institutional Review Boards and Alaska Native Tribal Health Consortium and Southcentral Foundation research review bodies. A data safety monitoring board, material transfer agreements and weekly study team meetings provide regular oversight throughout the study. Study findings will first be shared with AN tribal leaders, health administrators, providers and community members. Peer-reviewed journal articles and conference presentations will be forthcoming once approved by tribal review bodies. TRIAL REGISTRATION NUMBER NCT03028831.
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Affiliation(s)
- Kathryn R Koller
- Research Services, Alaska Native Tribal Health Consortium, Anchorage, Alaska, USA
| | - Annette Wilson
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Daniel P Normolle
- Hillman Cancer Center Biostatistics Facility, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jeremy K Nicholson
- Australian National Phenome Center, Murdoch University, Perth, Western Australia, Australia
| | - Jia V Li
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - James Kinross
- Department of Surgery and Cancer, Imperial College London, London, UK
| | - Flora R Lee
- Research Services, Alaska Native Tribal Health Consortium, Anchorage, Alaska, USA
| | - Christie A Flanagan
- Alaska Native Epidemiology Center, Alaska Native Tribal Health Consortium, Anchorage, Alaska, USA
| | - Zoe T Merculieff
- Wellness and Prevention, Alaska Native Tribal Health Consortium, Anchorage, Alaska, USA
| | - Priya Iyer
- Hillman Cancer Center Biostatistics Facility, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Daniela L Lammers
- Research Services, Alaska Native Tribal Health Consortium, Anchorage, Alaska, USA
| | - Timothy K Thomas
- Research Services, Alaska Native Tribal Health Consortium, Anchorage, Alaska, USA
| | - Stephen J D O'Keefe
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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15
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Parbie PK, Mizutani T, Ishizaka A, Kawana-Tachikawa A, Runtuwene LR, Seki S, Abana CZY, Kushitor D, Bonney EY, Ofori SB, Uematsu S, Imoto S, Kimura Y, Kiyono H, Ishikawa K, Ampofo WK, Matano T. Dysbiotic Fecal Microbiome in HIV-1 Infected Individuals in Ghana. Front Cell Infect Microbiol 2021; 11:646467. [PMID: 34084754 PMCID: PMC8168436 DOI: 10.3389/fcimb.2021.646467] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 04/19/2021] [Indexed: 12/12/2022] Open
Abstract
HIV-1 infected individuals under antiretroviral therapy can control viremia but often develop non-AIDS diseases such as cardiovascular and metabolic disorders. Gut microbiome dysbiosis has been indicated to be associated with progression of these diseases. Analyses of gut/fecal microbiome in individual regions are important for our understanding of pathogenesis in HIV-1 infections. However, data on gut/fecal microbiome has not yet been accumulated in West Africa. In the present study, we examined fecal microbiome compositions in HIV-1 infected adults in Ghana, where approximately two-thirds of infected adults are females. In a cross-sectional case-control study, age- and gender-matched HIV-1 infected adults (HIV+; n = 55) and seronegative controls (HIV-; n = 55) were enrolled. Alpha diversity of fecal microbiome in HIV+ was significantly reduced compared to HIV- and associated with CD4 counts. HIV+ showed reduction in varieties of bacteria including Faecalibacterium, the most abundant in seronegative controls, but enrichment of Proteobacteria. Ghanaian HIV+ exhibited enrichment of Dorea and Blautia; bacteria groups whose depletion has been reported in HIV-1 infected individuals in several other cohorts. Furthermore, HIV+ in our cohort exhibited a depletion of Prevotella, a genus whose enrichment has recently been shown in men having sex with men (MSM) regardless of HIV-1 status. The present study revealed the characteristics of dysbiotic fecal microbiome in HIV-1 infected adults in Ghana, a representative of West African populations.
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Affiliation(s)
- Prince Kofi Parbie
- AIDS Research Center, National Institute of Infectious Diseases, Tokyo, Japan
- Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
- Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, Japan
| | | | - Aya Ishizaka
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Ai Kawana-Tachikawa
- AIDS Research Center, National Institute of Infectious Diseases, Tokyo, Japan
- Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, Japan
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | | | - Sayuri Seki
- AIDS Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | | | - Dennis Kushitor
- Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Evelyn Yayra Bonney
- Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Sampson Badu Ofori
- Department of Internal Medicine, Regional Hospital Koforidua, Ghana Health Service, Koforidua, Ghana
| | - Satoshi Uematsu
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Immunology and Genomics, Osaka City University Graduate School of Medicine, Osaka, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo, Japan
| | - Seiya Imoto
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo, Japan
| | - Yasumasa Kimura
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Hiroshi Kiyono
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Institute for Global Prominent Research, Graduate School of Medicine, Chiba University, Chiba, Japan
- Chiba University-University of California San Diego Center for Mucosal Immunology, Allergy and Vaccines (cMAV), Department of Medicine, University of California San Diego, San Diego, CA, United States
| | - Koichi Ishikawa
- AIDS Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | | | - Tetsuro Matano
- AIDS Research Center, National Institute of Infectious Diseases, Tokyo, Japan
- Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, Japan
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
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16
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The Western Dietary Pattern Combined with Vancomycin-Mediated Changes to the Gut Microbiome Exacerbates Colitis Severity and Colon Tumorigenesis. Nutrients 2021; 13:nu13030881. [PMID: 33803094 PMCID: PMC8000903 DOI: 10.3390/nu13030881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 03/01/2021] [Accepted: 03/04/2021] [Indexed: 02/06/2023] Open
Abstract
Previous work by our group using a mouse model of inflammation-associated colorectal cancer (CAC) showed that the total Western diet (TWD) promoted colon tumor development. Others have also shown that vancomycin-mediated changes to the gut microbiome increased colorectal cancer (CRC). Therefore, the objective of this study was to determine the impact of vancomycin on colon tumorigenesis in the context of a standard mouse diet or the TWD. A 2 × 2 factorial design was used, in which C57Bl/6J mice were fed either the standard AIN93G diet or TWD and with vancomycin in the drinking water or not. While both the TWD and vancomycin treatments independently increased parameters associated with gut inflammation and tumorigenesis compared to AIN93G and plain water controls, mice fed the TWD and treated with vancomycin had significantly increased tumor multiplicity and burden relative to all other treatments. Vancomycin treatment significantly decreased alpha diversity and changed the abundance of several taxa at the phylum, family, and genus levels. Conversely, basal diet had relatively minor effects on the gut microbiome composition. These results support our previous research that the TWD promotes colon tumorigenesis and suggest that vancomycin-induced changes to the gut microbiome are associated with higher tumor rates.
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17
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Pothuraju R, Chaudhary S, Rachagani S, Kaur S, Roy HK, Bouvet M, Batra SK. Mucins, gut microbiota, and postbiotics role in colorectal cancer. Gut Microbes 2021; 13:1974795. [PMID: 34586012 PMCID: PMC8489937 DOI: 10.1080/19490976.2021.1974795] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/14/2021] [Accepted: 08/24/2021] [Indexed: 02/07/2023] Open
Abstract
An imbalance in the crosstalk between the host and gut microbiota affects the intestinal barrier function, which results in inflammatory diseases and colorectal cancer. The colon epithelium protects itself from a harsh environment and various pathogenic organisms by forming a double mucus layer, primarily comprising mucins. Recent studies are focusing on how dietary patterns alter the gut microbiota composition, which in turn regulates mucin expression and maintains the intestinal layers. In addition, modulation of gut microbiota by microbiotic therapy (involving fecal microbiota transplantation) has emerged as a significant factor in the pathologies associated with dysbiosis. Therefore, proper communication between host and gut microbiota via different dietary patterns (prebiotics and probiotics) is needed to maintain mucus composition, mucin synthesis, and regulation. Here, we review how the interactions between diet and gut microbiota and bacterial metabolites (postbiotics) regulate mucus layer functionalities and mucin expression in human health and disease.
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Affiliation(s)
- Ramesh Pothuraju
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Sanjib Chaudhary
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Satyanarayana Rachagani
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Sukhwinder Kaur
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Hemant K. Roy
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Michael Bouvet
- Division of Surgical Oncology, Department of Surgery, University of California San Diego, La Jolla, CA, USA
- VA San Diego Healthcare System, San Diego, CA, USA
| | - Surinder K. Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
- Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA
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Abstract
Host-associated microbial communities have an important role in shaping the health and fitness of plants and animals. Most studies have focused on the bacterial, fungal or viral communities, but often the archaeal component has been neglected. The archaeal community, the so-called archaeome, is now increasingly recognized as an important component of host-associated microbiomes. It is composed of various lineages, including mainly Methanobacteriales and Methanomassiliicoccales (Euryarchaeota), as well as representatives of the Thaumarchaeota. Host-archaeome interactions have mostly been delineated from methanogenic archaea in the gastrointestinal tract, where they contribute to substantial methane production and are potentially also involved in disease-relevant processes. In this Review, we discuss the diversity and potential roles of the archaea associated with protists, plants and animals. We also present the current understanding of the archaeome in humans, the specific adaptations involved in interaction with the resident microbial community as well as with the host, and the roles of the archaeome in both health and disease.
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19
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Lobel L, Cao YG, Fenn K, Glickman JN, Garrett WS. Diet posttranslationally modifies the mouse gut microbial proteome to modulate renal function. Science 2020; 369:1518-1524. [PMID: 32943527 PMCID: PMC8178816 DOI: 10.1126/science.abb3763] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 08/05/2020] [Indexed: 12/14/2022]
Abstract
Associations between chronic kidney disease (CKD) and the gut microbiota have been postulated, yet questions remain about the underlying mechanisms. In humans, dietary protein increases gut bacterial production of hydrogen sulfide (H2S), indole, and indoxyl sulfate. The latter are uremic toxins, and H2S has diverse physiological functions, some of which are mediated by posttranslational modification. In a mouse model of CKD, we found that a high sulfur amino acid-containing diet resulted in posttranslationally modified microbial tryptophanase activity. This reduced uremic toxin-producing activity and ameliorated progression to CKD in the mice. Thus, diet can tune microbiota function to support healthy host physiology through posttranslational modification without altering microbial community composition.
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Affiliation(s)
- Lior Lobel
- Departments of Immunology and Infectious Diseases and Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Y Grace Cao
- Departments of Immunology and Infectious Diseases and Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Kathrin Fenn
- Departments of Immunology and Infectious Diseases and Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Jonathan N Glickman
- Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
- Department of Pathology, Harvard Medical School, Boston, MA 02215, USA
| | - Wendy S Garrett
- Departments of Immunology and Infectious Diseases and Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
- Department of Medicine, Harvard Medical School, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
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20
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Afro-Caribbeans Have a Lower Prevalence of Advanced Colon Neoplasia than African-Americans. Dig Dis Sci 2020; 65:2412-2418. [PMID: 31745688 DOI: 10.1007/s10620-019-05956-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 11/09/2019] [Indexed: 12/09/2022]
Abstract
BACKGROUND/AIMS The black population in the USA is a heterogeneous group composed of smaller subgroups from different origins. The definition of black in many colorectal cancer (CRC) risk studies is vague, and differences in CRC risk comparing black subpopulations have not been evaluated. The aim of the study is to compare advanced colorectal neoplasia (ACN) between two subgroups of black populations: African-American (AA) and Afro-Caribbean (AC). A secondary aim was to determine whether there are differences in prevalence of adenomas. METHODS This was a retrospective study of 3797 AA and AC patients undergoing first time screening colonoscopy in two different institutions in the USA. RESULTS Overall adenoma prevalence was 29.3% for the entire population with 29.5% in AAs and 29.0% in AC with no statistically significant difference between the study groups (AOR: 1.02; 95% CI 0.88-1.18, P = 0.751). However, ACN was significantly higher in the AA group (11.8%) compared to AC (9.0%) (AOR: 1.30, 95% CI 1.02-1.66, P = 0.034). It was observed that AAs had ACN at a higher BMI than AC. After adjusting for BMI/ethnicity interactions, the difference in ACN between both groups became more significant (AOR: 1.93, 95% CI 1.16-3.23, P = 0.012). CONCLUSIONS AAs have a higher risk of ACN than AC. Current recommendations to start screening in average-risk AAs at an earlier age may not apply to other black subgroups.
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21
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Parbie PK, Mizutani T, Ishizaka A, Kawana-Tachikawa A, Runtuwene LR, Seki S, Abana CZY, Kushitor D, Bonney EY, Ofori SB, Uematsu S, Imoto S, Kimura Y, Kiyono H, Ishikawa K, Ampofo WK, Matano T. Fecal Microbiome Composition in Healthy Adults in Ghana. Jpn J Infect Dis 2020; 74:42-47. [PMID: 32611986 DOI: 10.7883/yoken.jjid.2020.469] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Recent studies have indicated an association between gut microbiome composition and various disorders, including infectious diseases. The composition of the microbiome differs among ethnicities and countries, possibly resulting in diversified interactions between host immunity and the gut microbiome. Characterization of baseline microbiome composition in healthy people is an essential step for better understanding of the biological interactions associated with individual populations. However, data on the gut/fecal microbiome have not been accumulated for individuals in West Africa. In the present study, we examined the fecal microbiome composition in healthy adults in Ghana. Toward this, 16S rRNA gene libraries were prepared using bacterial fractions derived from 55 Ghanaian adults, which were then subjected to next-generation sequencing. The fecal microbiome of the Ghanaian adults was dominated by Firmicutes (Faecalibacterium, Subdoligranulum, and Ruminococcaceae UCG-014), Proteobacteria (Escherichia-Shigella and Klebsiella), and Bacteroidetes (Prevotella 9 and Bacteroides), consistent with previous observations in African cohorts. Further, our analysis revealed differences in microbiome composition and a lower diversity of the fecal microbiome in the Ghanaian cohort compared with those reported in non-African countries. This is the first study to describe substantial fecal microbiome data obtained using high-throughput metagenomic tools on samples derived from a cohort in Ghana. The data may provide a valuable basis for determining the association between the fecal microbiome and progression of various diseases in West African populations.
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Affiliation(s)
- Prince Kofi Parbie
- Joint Research Center for Human Retrovirus Infection, Kumamoto University, Japan.,AIDS Research Center, National Institute of Infectious Diseases, Japan.,Noguchi Memorial Institute for Medical Research, University of Ghana, Ghana
| | | | - Aya Ishizaka
- The Institute of Medical Science, The University of Tokyo, Japan
| | - Ai Kawana-Tachikawa
- Joint Research Center for Human Retrovirus Infection, Kumamoto University, Japan.,AIDS Research Center, National Institute of Infectious Diseases, Japan.,The Institute of Medical Science, The University of Tokyo, Japan
| | | | - Sayuri Seki
- AIDS Research Center, National Institute of Infectious Diseases, Japan
| | | | - Dennis Kushitor
- Noguchi Memorial Institute for Medical Research, University of Ghana, Ghana
| | | | | | - Satoshi Uematsu
- The Institute of Medical Science, The University of Tokyo, Japan.,Department of Immunology and Genomics, Osaka City University Graduate School of Medicine, Japan.,Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Japan
| | - Seiya Imoto
- The Institute of Medical Science, The University of Tokyo, Japan.,Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Japan
| | - Yasumasa Kimura
- The Institute of Medical Science, The University of Tokyo, Japan
| | - Hiroshi Kiyono
- The Institute of Medical Science, The University of Tokyo, Japan.,Institute for Global Prominent Research, Graduate School of Medicine, Chiba University, Japan.,CU-UCSD Center for Mucosal Immunology, Allergy and Vaccines (cMAV), Department of Medicine, University of California San Diego, USA
| | - Koichi Ishikawa
- AIDS Research Center, National Institute of Infectious Diseases, Japan
| | | | - Tetsuro Matano
- Joint Research Center for Human Retrovirus Infection, Kumamoto University, Japan.,AIDS Research Center, National Institute of Infectious Diseases, Japan.,The Institute of Medical Science, The University of Tokyo, Japan
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Liu Z, Lin C, Mu L, Suo C, Ye W, Jin L, Franceschi S, Zhang T, Chen X. The disparities in gastrointestinal cancer incidence among Chinese populations in Shanghai compared to Chinese immigrants and indigenous non-Hispanic white populations in Los Angeles, USA. Int J Cancer 2020; 146:329-340. [PMID: 30838637 DOI: 10.1002/ijc.32251] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 01/23/2019] [Accepted: 02/20/2019] [Indexed: 03/25/2024]
Abstract
Gastrointestinal cancer patterns are distinct among populations. Our study aims to compare the incidence and risk of gastrointestinal cancers between Chinese American and non-Hispanic whites in Los Angeles, CA, USA, to those of people indigenous to Shanghai to elucidate the changing patterns of gastrointestinal cancers. Cancer incidence data from 1988 to 2012 were extracted from the Cancer Incidence in Five Continents plus database. The age standardized incidence and estimated annual percentage change were calculated to estimate the temporal trends of gastrointestinal cancers. Traditional Poisson regression models and three-factor constrained Poisson regression models were applied to compare the gastrointestinal cancer risk across populations. The incidences of oesophageal, stomach, liver and gall bladder cancers were higher among indigenous Chinese residents of Shanghai than among the other two populations in Los Angeles. While the incidences of colorectal and pancreatic cancer were higher among non-Hispanic whites, Chinese American immigrants were considered to be at an intermediate level for most gastrointestinal cancers. The gender-specific gastrointestinal cancer disparities across populations, especially between Shanghai Chinese and non-Hispanic US whites, were significant regardless of age, period or cohort scale. However, the regional differences in gastrointestinal cancer rates decreased over time. Most gastrointestinal cancer patterns in Chinese American immigrants were more aligned to those of their new country of residence than to those of their original country. The disparities in gastrointestinal cancers across populations indicate that environmental factors might play a key role in cancer genesis. Shift in environmental exposures may result in significant changes in gastrointestinal cancer incidence.
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Affiliation(s)
- Zhenqiu Liu
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
- Fudan University Taizhou Institute of Health Sciences, Taizhou, China
| | - Chunqing Lin
- International Agency for Research on Cancer, Lyon, France
| | - Lina Mu
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, State University of New York (SUNY) at Buffalo, Buffalo, NY
| | - Chen Suo
- Fudan University Taizhou Institute of Health Sciences, Taizhou, China
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, China
| | - Weimin Ye
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Li Jin
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
- Fudan University Taizhou Institute of Health Sciences, Taizhou, China
- Human Phenome Institute, Fudan University, Shanghai, China
| | - Silvia Franceschi
- Centro di Riferimento Oncologico di Aviano (CRO), IRCCS, Aviano, Italy
| | - Tiejun Zhang
- Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, China
| | - Xingdong Chen
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China
- Fudan University Taizhou Institute of Health Sciences, Taizhou, China
- Human Phenome Institute, Fudan University, Shanghai, China
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23
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O'Keefe SJ. The association between dietary fibre deficiency and high-income lifestyle-associated diseases: Burkitt's hypothesis revisited. Lancet Gastroenterol Hepatol 2019; 4:984-996. [PMID: 31696832 PMCID: PMC6944853 DOI: 10.1016/s2468-1253(19)30257-2] [Citation(s) in RCA: 103] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 06/27/2019] [Accepted: 07/08/2019] [Indexed: 02/07/2023]
Abstract
In 1969, Denis Burkitt published an article titled "Related disease-related cause?", which became the foundation for Burkitt's hypothesis. Working in Uganda, he noted that middle-aged people (40-60 years old) had a much lower incidence of diseases that were common in similarly aged people living in England, including colon cancer, diverticulitis, appendicitis, hernias, varicose veins, diabetes, atherosclerosis, and asthma, all of which are associated with lifestyles commonly led in high-income countries (HICs; also known as western diseases). Following Cleave's common cause hypothesis-which suggests that if a group of diseases occur together in the same population or individual, they are likely to have a common cause-Burkitt attributed these diseases to the small quantities of dietary fibre consumed in HICs due mainly to the over-processing of natural foods. Nowadays, dietary fibre intake in HICs is around 15 g/day (well below the amount of fibre Burkitt advocated of >50 g/day-which is associated with diets from rural, southern and eastern sub-Sahalean Africa). Since Burkitt's death in 1993, his hypothesis has been verified and extended by large-scale epidemiological studies, which have reported that fibre deficiency increases the risk of colon, liver, and breast cancer and increases all cancer mortality and death from cardiovascular, infectious, and respiratory diseases, diabetes, and all non-cardiovascular, non-cancer causes. Furthermore, mechanistic studies have now provided molecular explanations for these associations, typified by the role of short-chain fatty acids, products of fibre fermentation in the colon, in suppressing colonic mucosal inflammation and carcinogenesis. Evidence suggests that short-chain fatty acids can affect the epigenome through metabolic regulatory receptors in distant organs, and that this can reduce obesity, diabetes, atherosclerosis, allergy, and cancer. Diseases associated with high-income lifestyles are the most serious threat to health in developed countries, and public and governmental awareness needs to be improved to urge an increase in intake of fibre-rich foods. This Viewpoint will summarise the evidence that suggests that increasing dietary fibre intake to 50 g/day is likely to increase lifespan, improve the quality of life during the added years, and substantially reduce health-care costs.
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Affiliation(s)
- Stephen J O'Keefe
- Division of Gastroenterology, University of Pittsburgh, Pittsburgh, PA, USA; African Microbiome Institute, University of Stellenbosch, Stellenbosch, South Africa.
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Medhin LB, Achila OO, Abrham AT, Efrem B, Hailu K, Abraha DM, Gilazghi L, Meresie A, Said SM. Incidence of colorectal cancer in Eritrea: Data from the National Health Laboratory, 2011-2017. PLoS One 2019; 14:e0224045. [PMID: 31721763 PMCID: PMC6853305 DOI: 10.1371/journal.pone.0224045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 10/03/2019] [Indexed: 12/24/2022] Open
Abstract
Introduction Recent studies have reported a significant increase in the prevalence of colorectal cancer (CRC) in Sub-Saharan Africa (SSA). Further, several studies employing disparate modelling algorithms have projected a significant rise in the frequency of CRC cases in the region. However, lack of good quality data on multiple themes related to CRC including incidence, among others, continues to be a problem in the region. Therefore, this study was designed to collect data on the incidence of CRC in Eritrea. Methods We conducted a retrospective analysis using data captured between 2011 and 2017 at the National Health Laboratory (NHL) in Asmara, Eritrea. Results 241 colorectal cases were identified in the Eritrean National Health Laboratory (NHL) database between 2011 and 2017. In the final analysis we included 94 patients confirmed cases giving an average of 18.8 patients per annum. The average age ± Standard deviation (SD) was 57.62 ± 17.14 with a male: female ratio of 58/36 (1: 1.61). The minimum and maximum age of the patients was 19 and 90 years, respectively. The rectum to colon ratio was 47/47 (1:1). The proportion of patients < 50 years in this cohort was significant. The age-standardized incidence rate (ASIR) in the study period was between 0.97 per 100 000 to 2.21 per 100 000. Similarly, the cumulative ASIR was 9.97 per 100 000. Analysis of trends did not reveal shifts over the study period (P<0.05). However, a strong correlation between incidence and age was established. Conclusion This study suggests that the incidence of CRC in Eritrea is relatively low. A significant number of patients were less than 50 years of age. Even then it’s our opinion that this study may underestimate the incidence of CRC.
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Affiliation(s)
| | - Oliver Okoth Achila
- Clinical Laboratory Sciences, Orotta School of Medicine and Health Sciences, Asmara, Eritrea
| | | | - Biniam Efrem
- Clinical Laboratory Sciences, Orotta School of Medicine and Health Sciences, Asmara, Eritrea
| | - Kibrom Hailu
- Pathology, National Health Laboratory, Asmara, Eritrea
| | | | - Luwam Gilazghi
- Immunoserology, National Health Laboratory, Asmara, Eritrea
| | - Alay Meresie
- Clinical Chemistry, National Health Laboratory, Asmara, Eritrea
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Tang M, Frank DN, Tshefu A, Lokangaka A, Goudar SS, Dhaded SM, Somannavar MS, Hendricks AE, Ir D, Robertson CE, Kemp JF, Lander RL, Westcott JE, Hambidge KM, Krebs NF. Different Gut Microbial Profiles in Sub-Saharan African and South Asian Women of Childbearing Age Are Primarily Associated With Dietary Intakes. Front Microbiol 2019; 10:1848. [PMID: 31474951 PMCID: PMC6702451 DOI: 10.3389/fmicb.2019.01848] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 07/26/2019] [Indexed: 01/20/2023] Open
Abstract
Background To compare and characterize the gut microbiota in women of childbearing age from sub-Saharan Africa (the Democratic Republic of the Congo, DRC) and South Asia (India), in relation to dietary intakes. Methods Women of childbearing age were recruited from rural DRC and India as part of the Women First (WF) preconception maternal nutrition trial. Findings presented include fecal 16S rRNA gene-based profiling of women in the WF trial from samples obtained at the time of randomization, prior to initiation of nutrition intervention and to conception. Results Stool samples were collected from 217 women (DRC n = 117; India n = 100). Alpha diversity of the gut microbiota was higher in DRC than in India (Chao1: 91 ± 11 vs. 82 ± 12, P = 6.58E-07). The gut microbial community structure was not significantly affected by any demographical or environmental variables, such as maternal BMI, education, and water source. Prevotella, Succinivibrio, and Roseburia were at relatively high abundance without differences between sites. Bifidobacterium was higher in India (4.95 ± 1.0%) than DRC (0.3 ± 0.1%; P = 2.71E-27), as was Lactobacillus (DRC: 0.2 ± 0.0%; India: 1.2 ± 0.1%; P = 2.39E-13) and Faecalibacterium (DRC: 6.0 ± 1.7%; India: 8.4 ± 2.9%; P = 6.51E-7). Ruminococcus was higher in DRC (2.3 ± 0.7%) than in India (1.8 ± 0.4%; P = 3.24E-5) and was positively associated with consumption of flesh foods. Succinivibrio was positively associated with dairy intake in India and fish/insects in DRC. Faecalibacterium was positively associated with vitamin A-rich fruits and vegetables. Overall, these observations were consistent with India being primarily vegetarian with regular fermented dairy consumption and DRC regularly consuming animal-flesh foods. Conclusion Consumption of animal-flesh foods and fermented dairy foods were independently associated with the gut microbiota while demographic variables were not, suggesting that diet may have a stronger association with microbiota than demographic characteristics.
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Affiliation(s)
- Minghua Tang
- Section of Nutrition, Department of Pediatrics, University of Colorado Denver, Aurora, CO, United States
| | - Daniel N Frank
- Division of Infectious Diseases, School of Medicine, University of Colorado Denver, Aurora, CO, United States
| | - Antoinette Tshefu
- Kinshasa School of Public Health, Kinshasa, Democratic Republic of the Congo
| | - Adrien Lokangaka
- Kinshasa School of Public Health, Kinshasa, Democratic Republic of the Congo
| | - Shivaprasad S Goudar
- KLE Academy of Higher Education and Research's Jawaharlal Nehru Medical College, Belagavi, India
| | - Sangappa M Dhaded
- KLE Academy of Higher Education and Research's Jawaharlal Nehru Medical College, Belagavi, India
| | - Manjunath S Somannavar
- KLE Academy of Higher Education and Research's Jawaharlal Nehru Medical College, Belagavi, India
| | - Audrey E Hendricks
- Department of Mathematical and Statistical Sciences, University of Colorado Denver, Aurora, CO, United States
| | - Diana Ir
- Division of Infectious Diseases, School of Medicine, University of Colorado Denver, Aurora, CO, United States
| | - Charles E Robertson
- Division of Infectious Diseases, School of Medicine, University of Colorado Denver, Aurora, CO, United States
| | - Jennifer F Kemp
- Section of Nutrition, Department of Pediatrics, University of Colorado Denver, Aurora, CO, United States
| | - Rebecca L Lander
- Section of Nutrition, Department of Pediatrics, University of Colorado Denver, Aurora, CO, United States
| | - Jamie E Westcott
- Section of Nutrition, Department of Pediatrics, University of Colorado Denver, Aurora, CO, United States
| | - K Michael Hambidge
- Section of Nutrition, Department of Pediatrics, University of Colorado Denver, Aurora, CO, United States
| | - Nancy F Krebs
- Section of Nutrition, Department of Pediatrics, University of Colorado Denver, Aurora, CO, United States
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David Y, Ottaviano L, Park J, Iqbal S, Likhtshteyn M, Kumar S, Lyo H, Lewis AE, Lung BE, Frye JT, Huang L, Li E, Yang J, Martello L, Vignesh S, Miller JD, Follen M, Grossman EB. Confounders in Adenoma Detection at Initial Screening Colonoscopy: A Factor in the Assessment of Racial Disparities as a Risk for Colon Cancer. ACTA ACUST UNITED AC 2019; 10:269-289. [PMID: 31032142 DOI: 10.4236/jct.2019.104022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background and Aims The incidence and mortality of colorectal cancer is persistently highest in Black/African-Americans in the United States. While access to care, barriers to screening, and poverty might explain these findings, there is increased interest in examining biological factors that impact the colonic environment. Our group is examining biologic factors that contribute to disparities in development of adenomas prospectively. In preparation for this and to characterize a potential patient population, we conducted a retrospective review of initial screening colonoscopies in a cohort of patients. Methods A retrospective review was performed on initial average risk screening colonoscopies on patients (age 45-75 years) during 2012 at three institutions. Descriptive statistics and multivariable logistic regression models were used to examine the relationship between potential risk factors and the detection of adenomas. Results Of the 2225 initial screening colonoscopies 1495 (67.2%) were performed on Black/African-Americans and 566 (25.4%) on Caucasians. Multivariable logistic regression revealed that older age, male sex, current smoking and teaching gastroenterologists were associated with higher detection of adenomas and these were less prevalent among Black/African-Americas except for age. Neither race, ethnicity, BMI, diabetes mellitus, HIV nor insurance were associated with adenoma detection. Conclusion In this sample, there was no association between race and adenoma detection. While this may be due to a lower prevalence of risk factors for adenomas in this sample, our findings were confounded by a lower detection rate by consultant gastroenterologists at one institution. The study allowed us to rectify the problem and characterize patients for future trials.
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Affiliation(s)
- Yakira David
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, New York, United States of America (USA) 11203.,Department of Gastroenterology, Icahn School of Medicine at Mount Sinai, 1 Gustave Levy Place, New York, USA 10025
| | - Lorenzo Ottaviano
- Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Jihye Park
- Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York, USA
| | - Sadat Iqbal
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, New York, United States of America (USA) 11203
| | - Michelle Likhtshteyn
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, New York, United States of America (USA) 11203
| | - Samir Kumar
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, New York, United States of America (USA) 11203
| | - Helen Lyo
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, New York, United States of America (USA) 11203
| | - Ayanna E Lewis
- Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Brandon E Lung
- Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Jesse T Frye
- Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Li Huang
- Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Ellen Li
- Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Jie Yang
- Department of Family, Population and Preventive Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Laura Martello
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, New York, United States of America (USA) 11203
| | - Shivakumar Vignesh
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, New York, United States of America (USA) 11203
| | - Joshua D Miller
- Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Michele Follen
- Department of Obstetrics and Gynecology, NYC HNC/Kings County, 451 Clarkson Ave, Brooklyn, New York, USA 11203
| | - Evan B Grossman
- Department of Medicine, SUNY Downstate Medical Center, Brooklyn, New York, United States of America (USA) 11203.,Department of Medicine, Division of Gastroenterology, NYC Health and Hospitals/Kings County, 451 Clarkson Ave, Brooklyn, New York, USA 11203
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Arora M, Baldi A, Kapila N, Bhandari S, Jeet K. Impact of Probiotics and Prebiotics on Colon Cancer: Mechanistic Insights and Future Approaches. CURRENT CANCER THERAPY REVIEWS 2019. [DOI: 10.2174/1573394714666180724122042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Colon cancer is one of the most common and most diagnosed types of cancer. It is a
major cause of increased rate of morbidity and mortality across the globe. Currently, the focus has
been shifted towards natural remedies for the treatment of colon cancer. These new methods of
treatment include prebiotics and probiotics, as they offer great potential for alleviating symptoms
of cancer. These are more promising and have lesser side effects than existing medications. Probiotics
are living organisms which confer health benefits when ingested into adequate amounts.
Prebiotics are non-digestible ingredients which promote the growth of beneficial bacteria, which
produce metabolites for stimulation of apoptosis of colonic cancer cell lines. Apart from it,
prebiotics are helpful to modify the activity of enzymes to be produced by beneficial bacteria as
well as for inhibition of several bacteria able to produce carcinogenic enzymes. This review has
been collated to present tremendous benefits and future potential of pro- and prebiotics in the
treatment of colon cancer and to overview the mechanisms of probiotic actions along with their
impact on humans.
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Affiliation(s)
- Malika Arora
- Multi Disciplinary Research Unit, Guru Gobind Singh Medical College and Hospital, Faridkot, Punjab, India
| | - Ashish Baldi
- Department of Pharmaceutical Sciences and Technology, Maharaja Ranjit Singh Punjab Technical University, Bathinda, Punjab, India
| | - Nitesh Kapila
- Department of Quality Assurance, Faculty of Pharmacy, I.S.F. College of Pharmacy, Moga, Punjab, India
| | - Saurav Bhandari
- Department of Quality Assurance, Faculty of Pharmacy, I.S.F. College of Pharmacy, Moga, Punjab, India
| | - Kamal Jeet
- IKG Punjab Technical University, Jalandhar, Punjab, India
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Ramezani A, Nolin TD, Barrows IR, Serrano MG, Buck GA, Regunathan-Shenk R, West RE, Latham PS, Amdur R, Raj DS. Gut Colonization with Methanogenic Archaea Lowers Plasma Trimethylamine N-oxide Concentrations in Apolipoprotein e-/- Mice. Sci Rep 2018; 8:14752. [PMID: 30283097 PMCID: PMC6170401 DOI: 10.1038/s41598-018-33018-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 09/20/2018] [Indexed: 01/19/2023] Open
Abstract
A mechanistic link between trimethylamine N-oxide (TMAO) and atherogenesis has been reported. TMAO is generated enzymatically in the liver by the oxidation of trimethylamine (TMA), which is produced from dietary choline, carnitine and betaine by gut bacteria. It is known that certain members of methanogenic archaea (MA) could use methylated amines such as trimethylamine as growth substrates in culture. Therefore, we investigated the efficacy of gut colonization with MA on lowering plasma TMAO concentrations. Initially, we screened for the colonization potential and TMAO lowering efficacy of five MA species in C57BL/6 mice fed with high choline/TMA supplemented diet, and found out that all five species could colonize and lover plasma TMAO levels, although with different efficacies. The top performing MA, Methanobrevibacter smithii, Methanosarcina mazei, and Methanomicrococcus blatticola, were transplanted into Apoe−/− mice fed with high choline/TMA supplemented diet. Similar to C57BL/6 mice, following initial provision of the MA, there was progressive attrition of MA within fecal microbial communities post-transplantation during the initial 3 weeks of the study. In general, plasma TMAO concentrations decreased significantly in proportion to the level of MA colonization. In a subsequent experiment, use of antibiotics and repeated transplantation of Apoe−/− mice with M. smithii, led to high engraftment levels during the 9 weeks of the study, resulting in a sustained and significantly lower average plasma TMAO concentrations (18.2 ± 19.6 μM) compared to that in mock-transplanted control mice (120.8 ± 13.0 μM, p < 0.001). Compared to control Apoe−/− mice, M. smithii-colonized mice also had a 44% decrease in aortic plaque area (8,570 μm [95% CI 19587–151821] vs. 15,369 μm [95% CI [70058–237321], p = 0.34), and 52% reduction in the fat content in the atherosclerotic plaques (14,283 μm [95% CI 4,957–23,608] vs. 29,870 μm [95% CI 18,074–41,666], p = 0.10), although these differences did not reach significance. Gut colonization with M. smithii leads to a significant reduction in plasma TMAO levels, with a tendency for attenuation of atherosclerosis burden in Apoe−/− mice. The anti-atherogenic potential of MA should be further tested in adequately powered experiments.
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Affiliation(s)
- Ali Ramezani
- Division of Renal Diseases and Hypertension, The George Washington University School of Medicine, Washington, DC, USA
| | - Thomas D Nolin
- Department of Pharmacy and Therapeutics, Center for Clinical Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, USA.,Department of Medicine, Renal-Electrolyte Division, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ian R Barrows
- Department of Medicine Georgetown University School of Medicine, Washington, DC, USA
| | - Myrna G Serrano
- Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, VA, USA
| | - Gregory A Buck
- Department of Microbiology and Immunology, Medical College of Virginia Campus of Virginia Commonwealth University, Richmond, VA, USA
| | - Renu Regunathan-Shenk
- Division of Renal Diseases and Hypertension, The George Washington University School of Medicine, Washington, DC, USA
| | - Raymond E West
- Department of Pharmacy and Therapeutics, Center for Clinical Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, USA
| | - Patricia S Latham
- Departments of Pathology and Medicine, The George Washington University, Washington, DC, USA
| | - Richard Amdur
- Medical Faculty Associates, Department of Surgery, George Washington University School of Medicine & Health Sciences, Washington, DC, USA
| | - Dominic S Raj
- Division of Renal Diseases and Hypertension, The George Washington University School of Medicine, Washington, DC, USA.
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Chan YM, Aufreiter S, O'Keefe SJ, O'Connor DL. Switching to a fibre-rich and low-fat diet increases colonic folate contents among African Americans. Appl Physiol Nutr Metab 2018; 44:127-132. [PMID: 29996064 DOI: 10.1139/apnm-2018-0181] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
How dietary patterns impact colonic bacterial biosynthesis of vitamins and utilization by humans is poorly understood. Our aim was to investigate whether a reciprocal dietary switch between rural South Africans (traditionally high fibre, low fat) and African Americans (Western diet of low fibre, high fat) affects colonic folate synthesis. Colonic evacuants were obtained from 20 rural South Africans and 20 African Americans consuming their usual diets at baseline. For 2 weeks thereafter, rural South Africans were provided with a Western diet (protein, 27%; fat, 52%; carbohydrate, 20%; and fibre, 8 g/day) and African Americans were provided with a high fibre, low-fat diet (protein, 16%; fat, 17%; carbohydrate, 63%; and fibre, 43 g/day). Colonic evacuants were again collected. No difference between groups at baseline in the folate content of 3-h evacuants was observed. The high-fibre, low-fat diet consumed by African Americans during the intervention produced a 41% increase in mean total folate content compared with baseline values (p = 0.0037). No change was observed in rural South Africans consuming a Western diet. Mean total folate content of colonic evacuants was higher among African Americans at the end of the dietary switch (3107 ± 1811 μg) compared with rural South Africans (2157 ± 1956 μg) (p = 0.0409). In conclusion, consistent with animal studies, switching from a Western diet to one higher in fibre and lower in fat can be expected to result in greater colonic folate content. Future research should confirm that these observations are not transitory and understand the contribution of transit-time to the findings.
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Affiliation(s)
- Yen-Ming Chan
- a Department of Nutritional Sciences, University of Toronto and Translational Medicine Program, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Susanne Aufreiter
- b Translational Medicine Program, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Stephen J O'Keefe
- c Department of Gastroenterology, Hepatology and Nutrition, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Deborah L O'Connor
- d Translational Medicine Program, The Hospital for Sick Children and Department of Nutritional Sciences, University of Toronto, Toronto, ON M5S 1A8, Canada
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Bridges KM, Diaz FJ, Wang Z, Ahmed I, Sullivan DK, Umar S, Buckles DC, Greiner KA, Hester CM. Relating Stool Microbial Metabolite Levels, Inflammatory Markers and Dietary Behaviors to Screening Colonoscopy Findings in a Racially/Ethnically Diverse Patient Population. Genes (Basel) 2018; 9:genes9030119. [PMID: 29495356 PMCID: PMC5867840 DOI: 10.3390/genes9030119] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 02/09/2018] [Accepted: 02/20/2018] [Indexed: 12/11/2022] Open
Abstract
Colorectal cancer (CRC) is the third leading cause of cancer death for both men and women in the United States, yet it is treatable and preventable. African Americans have higher incidence of CRC than other racial/ethnic groups, however, it is unclear whether this disparity is primarily due to environmental or biological factors. Short chain fatty acids (SCFAs) are metabolites produced by bacteria in the colon and are known to be inversely related to CRC progression. The aim of this study is to investigate how stool SCFA levels, markers of inflammation in stool and dietary intake relate to colonoscopy findings in a diverse patient population. Stool samples from forty-eight participants were analyzed for SCFA levels and inflammatory markers (lysozyme, secretory IgA, lactoferrin). Additionally, participants completed the National Cancer Institute's Diet History Questionnaire II (DHQ II) to report dietary intake over the past year. Subsequently, the majority of participants underwent screening colonoscopy. Our results showed that African Americans had higher total levels of SCFAs in stool than other racial/ethnic groups, significantly lower intake of non-starchy vegetables and similar inflammatory marker expression and colonoscopy outcomes, compared to others. This work is an initial exploration into the biological and clinical factors that may ultimately inform personalized screening approaches and clinical decision-making to improve colorectal cancer disparities for African Americans.
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Affiliation(s)
- Kristina M Bridges
- Department of Family Medicine Research Division, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Francisco J Diaz
- Department of Biostatistics, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Zhiwen Wang
- Department of Biostatistics, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Ishfaq Ahmed
- Department of Surgery, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Debra K Sullivan
- Department of Dietetics and Nutrition, University of Kansas Medical Center, Kansas City, KS 66160, USA.
- University of Kansas Cancer Center, Kansas City, KS 66160, USA.
| | - Shahid Umar
- Department of Surgery, University of Kansas Medical Center, Kansas City, KS 66160, USA.
- University of Kansas Cancer Center, Kansas City, KS 66160, USA.
| | - Daniel C Buckles
- Department of Internal Medicine, Gastroenterology and Hepatology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - K Allen Greiner
- Department of Family Medicine Research Division, University of Kansas Medical Center, Kansas City, KS 66160, USA.
- University of Kansas Cancer Center, Kansas City, KS 66160, USA.
| | - Christina M Hester
- Department of Family Medicine Research Division, University of Kansas Medical Center, Kansas City, KS 66160, USA.
- University of Kansas Cancer Center, Kansas City, KS 66160, USA.
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van der Beek CM, Dejong CHC, Troost FJ, Masclee AAM, Lenaerts K. Role of short-chain fatty acids in colonic inflammation, carcinogenesis, and mucosal protection and healing. Nutr Rev 2017; 75:286-305. [PMID: 28402523 DOI: 10.1093/nutrit/nuw067] [Citation(s) in RCA: 220] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Short-chain fatty acids (SCFAs), mainly acetate, propionate, and butyrate, produced by microbial fermentation of undigested food substances are believed to play a beneficial role in human gut health. Short-chain fatty acids influence colonic health through various mechanisms. In vitro and ex vivo studies show that SCFAs have anti-inflammatory and anticarcinogenic effects, play an important role in maintaining metabolic homeostasis in colonocytes, and protect colonocytes from external harm. Animal studies have found substantial positive effects of SCFAs or dietary fiber on colonic disease, but convincing evidence in humans is lacking. Most human intervention trials have been conducted in the context of inflammatory bowel disease. Only a limited number of those trials are of high quality, showing little or no favorable effect of SCFA treatment over placebo. Opportunities for future research include exploring the use of combination therapies with anti-inflammatory drugs, prebiotics, or probiotics; the use of prodrugs in the setting of carcinogenesis; or the direct application of SCFAs to improve mucosal healing after colonic surgery.
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Affiliation(s)
- Christina M van der Beek
- C.M. van der Beek, C.H.C. Dejong, F.J. Troost, A.A.M. Masclee, and K. Lenaerts are with Top Institute Food and Nutrition, Wageningen, the Netherlands. C.M. van der Beek, C.H.C. Dejong, and K. Lenaerts are with the Department of Surgery, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands. C.H.C. Dejong is with the School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center+, Maastricht, the Netherlands. F.J. Troost and A.A.M. Masclee are with the Department of Internal Medicine, Division of Gastroenterology-Hepatology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Cornelis H C Dejong
- C.M. van der Beek, C.H.C. Dejong, F.J. Troost, A.A.M. Masclee, and K. Lenaerts are with Top Institute Food and Nutrition, Wageningen, the Netherlands. C.M. van der Beek, C.H.C. Dejong, and K. Lenaerts are with the Department of Surgery, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands. C.H.C. Dejong is with the School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center+, Maastricht, the Netherlands. F.J. Troost and A.A.M. Masclee are with the Department of Internal Medicine, Division of Gastroenterology-Hepatology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Freddy J Troost
- C.M. van der Beek, C.H.C. Dejong, F.J. Troost, A.A.M. Masclee, and K. Lenaerts are with Top Institute Food and Nutrition, Wageningen, the Netherlands. C.M. van der Beek, C.H.C. Dejong, and K. Lenaerts are with the Department of Surgery, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands. C.H.C. Dejong is with the School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center+, Maastricht, the Netherlands. F.J. Troost and A.A.M. Masclee are with the Department of Internal Medicine, Division of Gastroenterology-Hepatology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Ad A M Masclee
- C.M. van der Beek, C.H.C. Dejong, F.J. Troost, A.A.M. Masclee, and K. Lenaerts are with Top Institute Food and Nutrition, Wageningen, the Netherlands. C.M. van der Beek, C.H.C. Dejong, and K. Lenaerts are with the Department of Surgery, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands. C.H.C. Dejong is with the School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center+, Maastricht, the Netherlands. F.J. Troost and A.A.M. Masclee are with the Department of Internal Medicine, Division of Gastroenterology-Hepatology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Kaatje Lenaerts
- C.M. van der Beek, C.H.C. Dejong, F.J. Troost, A.A.M. Masclee, and K. Lenaerts are with Top Institute Food and Nutrition, Wageningen, the Netherlands. C.M. van der Beek, C.H.C. Dejong, and K. Lenaerts are with the Department of Surgery, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands. C.H.C. Dejong is with the School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center+, Maastricht, the Netherlands. F.J. Troost and A.A.M. Masclee are with the Department of Internal Medicine, Division of Gastroenterology-Hepatology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands
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Gut Microbe-Mediated Suppression of Inflammation-Associated Colon Carcinogenesis by Luminal Histamine Production. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:2323-2336. [PMID: 28917668 DOI: 10.1016/j.ajpath.2017.06.011] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 06/15/2017] [Accepted: 06/21/2017] [Indexed: 01/05/2023]
Abstract
Microbiome-mediated suppression of carcinogenesis may open new avenues for identification of therapeutic targets and prevention strategies in oncology. Histidine decarboxylase (HDC) deficiency has been shown to promote inflammation-associated colorectal cancer by accumulation of CD11b+Gr-1+ immature myeloid cells, indicating a potential antitumorigenic effect of histamine. Here, we demonstrate that administration of hdc+Lactobacillus reuteri in the gut resulted in luminal hdc gene expression and histamine production in the intestines of Hdc-/- mice. This histamine-producing probiotic decreased the number and size of colon tumors and colonic uptake of [18F]-fluorodeoxyglucose by positron emission tomography in Hdc-/- mice. Administration of L. reuteri suppressed keratinocyte chemoattractant (KC), Il22, Il6, Tnf, and IL1α gene expression in the colonic mucosa and reduced the amounts of proinflammatory, cancer-associated cytokines, keratinocyte chemoattractant, IL-22, and IL-6, in plasma. Histamine-generating L. reuteri also decreased the relative numbers of splenic CD11b+Gr-1+ immature myeloid cells. Furthermore, an isogenic HDC-deficient L. reuteri mutant that was unable to generate histamine did not suppress carcinogenesis, indicating a significant role of the cometabolite, histamine, in suppression of chronic intestinal inflammation and colorectal tumorigenesis. These findings link luminal conversion of amino acids to biogenic amines by gut microbes and probiotic-mediated suppression of colorectal neoplasia.
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Pancreatic and Intestinal Function Post Roux-en-Y Gastric Bypass Surgery for Obesity. Clin Transl Gastroenterol 2017; 8:e112. [PMID: 28771242 PMCID: PMC5587840 DOI: 10.1038/ctg.2017.39] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 06/12/2017] [Indexed: 11/09/2022] Open
Abstract
OBJECTIVES Despite the fact that the most effective treatment for morbid obesity today is gastric bypass surgery, some patients develop life-threatening nutritional complications associated with their weight loss. METHODS Here we examine the influence of the altered anatomy and digestive physiology on pancreatic secretion and fat absorption. Thirteen post Roux-en-Y gastric bypass (RYGB) patients who had lost >100 lbs in the first year following surgery and who gave variable histories of gastrointestinal (GI) dysfunction, were selected for study. Food-stimulated pancreatic enzyme secretion and GI hormone responses were measured during 2 h perfusions of the Roux limb with a standard polymeric liquid formula diet and polyethylene glycol marker, with collections of secretions from the common channel distal to the anastomosis and blood testing. Fat absorption was then measured during a 72 h balance study when a normal diet was given containing ~100 g fat/d. RESULTS Result showed that all patients had some fat malabsorption, but eight had coefficients of fat absorption <80%, indicative of steatorrhea. This was associated with significantly lower feed-stimulated secretion rates of trypsin, amylase, and lipase, and higher plasma peptide-YY concentrations compared with healthy controls. Five steatorrhea patients were subsequently treated with low quantities of pancreatic enzyme supplements for 3 months, and then retested. The supplements were well tolerated, and fat absorption improved in four of five patients accompanied by an increase in lipase secretion, but body weight increased in only three. Postprandial breath hydrogen concentrations were elevated with some improvement following enzyme supplementation suggesting persistent bacterial overgrowth and decreased colonic fermentation. CONCLUSIONS Our investigations revealed a wide spectrum of gastrointestinal abnormalities, including fat malabsorption, impaired food stimulated pancreatic secretion, ileal brake stimulation, and bacterial overgrowth, in patients following RYGB which could be attributed to the breakdown of the normally highly orchestrated digestive anatomy and physiology.
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Vila-Real C, Pimenta-Martins A, Gomes AM, Pinto E, Maina NH. How dietary intake has been assessed in African countries? A systematic review. Crit Rev Food Sci Nutr 2017; 58:1002-1022. [PMID: 27996293 DOI: 10.1080/10408398.2016.1236778] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Dietary patterns are often considered as one of the main causes of non-communicable diseases worldwide. It is of utmost importance to study dietary habits in developing countries since this work is scarce. OBJECTIVE To summarize the most recent research conducted in this field in African countries, namely the most used methodologies and tools. METHODS A systematic review was conducted on MEDLINE®/PubMed, aiming to identify scientific publications focused on studies of dietary intake of different African populations, in a ten-year period. Papers not written in English/Portuguese/Spanish, studies developed among African people but not developed in African countries, studies aiming to assess a particular nutrient/specific food/food toxin and studies that assessed dietary intake among children were excluded. FINDINGS Out of 99 included studies, the 24-hour recall and the food-frequency questionnaire were the most used dietary intake assessment tools, used to assess diet at an individual level. It was also observed that often country-unspecific food composition databases are used, and the methodologies employed are poorly validated and standardized. CONCLUSIONS There is an emergent need to improve the existing food databases by updating food data and to develop suitable country-specific databases for those that do not have their own food composition table.
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Affiliation(s)
- Catarina Vila-Real
- a Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado , Escola Superior de Biotecnologia , Rua Arquiteto Lobão Vital, Porto , Portugal
| | - Ana Pimenta-Martins
- a Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado , Escola Superior de Biotecnologia , Rua Arquiteto Lobão Vital, Porto , Portugal
| | - Ana Maria Gomes
- a Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado , Escola Superior de Biotecnologia , Rua Arquiteto Lobão Vital, Porto , Portugal
| | - Elisabete Pinto
- a Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado , Escola Superior de Biotecnologia , Rua Arquiteto Lobão Vital, Porto , Portugal.,b Instituto de Saúde Pública, Universidade do Porto , Porto , Portugal
| | - Ndegwa Henry Maina
- c Division of Food Technology, Department of Food and Environmental Sciences , University of Helsinki , Helsinki , Finland
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Gupta VK, Paul S, Dutta C. Geography, Ethnicity or Subsistence-Specific Variations in Human Microbiome Composition and Diversity. Front Microbiol 2017; 8:1162. [PMID: 28690602 PMCID: PMC5481955 DOI: 10.3389/fmicb.2017.01162] [Citation(s) in RCA: 590] [Impact Index Per Article: 84.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 06/07/2017] [Indexed: 12/14/2022] Open
Abstract
One of the fundamental issues in the microbiome research is characterization of the healthy human microbiota. Recent studies have elucidated substantial divergences in the microbiome structure between healthy individuals from different race and ethnicity. This review provides a comprehensive account of such geography, ethnicity or life-style-specific variations in healthy microbiome at five major body habitats—Gut, Oral-cavity, Respiratory Tract, Skin, and Urogenital Tract (UGT). The review focuses on the general trend in the human microbiome evolution—a gradual transition in the gross compositional structure along with a continual decrease in diversity of the microbiome, especially of the gut microbiome, as the human populations passed through three stages of subsistence like foraging, rural farming and industrialized urban western life. In general, gut microbiome of the hunter-gatherer populations is highly abundant with Prevotella, Proteobacteria, Spirochaetes, Clostridiales, Ruminobacter etc., while those of the urban communities are often enriched in Bacteroides, Bifidobacterium, and Firmicutes. The oral and skin microbiome are the next most diverse among different populations, while respiratory tract and UGT microbiome show lesser variations. Higher microbiome diversity is observed for oral-cavity in hunter-gatherer group with higher prevalence of Haemophilus than agricultural group. In case of skin microbiome, rural and urban Chinese populations show variation in abundance of Trabulsiella and Propionibacterium. On the basis of published data, we have characterized the core microbiota—the set of genera commonly found in all populations, irrespective of their geographic locations, ethnicity or mode of subsistence. We have also identified the major factors responsible for geography-based alterations in microbiota; though it is not yet clear which factor plays a dominant role in shaping the microbiome—nature or nurture, host genetics or his environment. Some of the geographical/racial variations in microbiome structure have been attributed to differences in host genetics and innate/adaptive immunity, while in many other cases, cultural/behavioral features like diet, hygiene, parasitic load, environmental exposure etc. overshadow genetics. The ethnicity or population-specific variations in human microbiome composition, as reviewed in this report, question the universality of the microbiome-based therapeutic strategies and recommend for geographically tailored community-scale approaches to microbiome engineering.
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Affiliation(s)
- Vinod K Gupta
- Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical BiologyKolkata, India.,Academy of Scientific and Innovative ResearchKolkata, India
| | - Sandip Paul
- Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical BiologyKolkata, India
| | - Chitra Dutta
- Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical BiologyKolkata, India.,Academy of Scientific and Innovative ResearchKolkata, India
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Ntombela XH, Zulu BM, Masenya M, Sartorius B, Madiba TE. Is the clinicopathological pattern of colorectal carcinoma similar in the state and private healthcare systems of South Africa? Analysis of a Durban colorectal cancer database. Trop Doct 2017; 47:360-364. [PMID: 28537520 DOI: 10.1177/0049475517710887] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Previous state hospital-based local studies suggest varying population-based clinicopathological patterns of colorectal cancer (CRC). Patients diagnosed with CRC in the state and private sector hospitals in Durban, South Africa over a 12-month period (January-December 2009) form the basis of our study. Of 491 patients (172 state and 319 private sector patients), 258 were men. State patients were younger than private patients. Anatomical site distribution was similar in both groups with minor variations. Stage IV disease was more common in state patients. State patients were younger, presented with advanced disease and had a lower resection rate. Black patients were the youngest, presented with advanced disease and had the lowest resection rate.
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Affiliation(s)
- Xolani H Ntombela
- 1 Colorectal Unit, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa
| | - Babongile Mw Zulu
- 1 Colorectal Unit, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa
| | | | - Ben Sartorius
- 3 Gastrointestinal Cancer Research Centre, University of KwaZulu-Natal, Durban, South Africa.,4 Biostatics Division, School of Public Health, University of KwaZulu-Natal, Durban, South Africa
| | - Thandinkosi E Madiba
- 1 Colorectal Unit, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa.,3 Gastrointestinal Cancer Research Centre, University of KwaZulu-Natal, Durban, South Africa
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Medhanie GA, Fedewa SA, Adissu H, DeSantis CE, Siegel RL, Jemal A. Cancer incidence profile in sub-Saharan African-born blacks in the United States: Similarities and differences with US-born non-Hispanic blacks. Cancer 2017; 123:3116-3124. [PMID: 28407201 DOI: 10.1002/cncr.30701] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 02/28/2017] [Accepted: 03/07/2017] [Indexed: 01/22/2023]
Abstract
BACKGROUND Sub-Saharan African-born blacks (ABs) are one of the fastest-growing populations in the United States. However, to the authors' knowledge, data regarding the cancer burden in this group are lacking, which would inform targeted cancer prevention and control. METHODS The authors calculated age-standardized proportional incidence ratios (PIRs) comparing the frequency of the top 15 cancers in ABs with that of US-born non-Hispanic blacks (USBs) by sex and region of birth using incidence data for 2000 through 2012 from the Surveillance, Epidemiology, and End Results (SEER 17) program. RESULTS Compared with USBs, ABs had significantly higher PIRs of infection-related cancers (liver, stomach, and Kaposi sarcoma), blood cancers (leukemia and non-Hodgkin lymphoma), prostate cancer, and thyroid cancers (females only). For example, the PIR for Kaposi sarcoma in AB versus USB women was 12.06 (95% confidence interval [95% CI], 5.23-18.90). In contrast, ABs had lower PIRs for smoking-related and colorectal cancers (eg, for lung cancer among men, the PIR was 0.30 [95% CI, 0.27-0.34]). Furthermore, cancer occurrence in ABs versus USBs varied by region of birth. For example, the higher PIRs for liver cancer noted among male ABs (PIR, 3.57; 95% CI, 1.79-5.35) and for thyroid cancer in female ABs (PIR, 3.03; 95% CI, 2.03-4.02) were confined to Eastern African-born blacks, whereas the higher PIR for prostate cancer (PIR, 1.90; 95% CI, 1.78, 2.02) was confined to Western African-born blacks. CONCLUSIONS The cancer incidence profile of ABs is different from that of USBs and varies by region of birth, suggesting differences in environmental, cultural, social, and genetic factors. The findings of the current study could stimulate etiologic research and help to inform targeted interventions. Cancer 2017;123:3116-24. © 2017 American Cancer Society.
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Affiliation(s)
- Genet A Medhanie
- Food Animal and Health Research Program, Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, Ohio
| | - Stacey A Fedewa
- Surveillance and Health Services Research Program, American Cancer Society, Atlanta, Georgia
| | | | - Carol E DeSantis
- Surveillance and Health Services Research Program, American Cancer Society, Atlanta, Georgia
| | - Rebecca L Siegel
- Surveillance and Health Services Research Program, American Cancer Society, Atlanta, Georgia
| | - Ahmedin Jemal
- Surveillance and Health Services Research Program, American Cancer Society, Atlanta, Georgia
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Abstract
GOALS To investigate trends in colorectal cancer (CRC) incidence and survival among Hispanics in Texas. BACKGROUND The incidence of CRC is rising among young adults in the United States. Given Texas' large Hispanic population, investigating CRC trends in Texas may provide valuable insight into the future of CRC epidemiology in an ever-diversifying US population. STUDY Data from the Texas Cancer Registry (1995 to 2010) were used to calculate age-adjusted CRC rates based on the 2000 US standard population. Annual percentage change (APC) and 5-year cancer-specific survival (CSS) rates were reported by age, race/ethnicity, stage, and anatomic location. RESULTS Of 123,083 CRC cases, 11% occurred in individuals below 50 years old, 26% of whom were Hispanic. Incidence was highest among African Americans (AAs; 76.3/100,000), followed by non-Hispanic whites (NHWs; 60.2/100,000) and Hispanics (50.8/100,000). Although overall CRC incidence declined between 1995 and 2010 (APC, -1.8%; P<0.01), trends differed by age and race/ethnicity. Among individuals 50 years and above, the rate of decline was statistically significant among NHWs (APC, -2.4%; P<0.01) and AAs (APC, -1.3%; P<0.01) but not among Hispanics (APC, -0.6%; P=0.13). In persons aged 20 to 39 years, CRC incidence rose significantly among Hispanics (APC, 2.6%; P<0.01) and NHWs (APC, 2.4%; P<0.01), but not AAs (APC, 0.3%; P=0.75). CSS rates among Hispanics and NHWs were comparable across most age groups and cancer stages, whereas CSS rates among AAs were generally inferior to those observed among NHWs and Hispanics. CONCLUSIONS Although CRC incidence has declined in Texas, it is rising among young Hispanics and NHWs while declining more slowly among older Hispanics than among older NHWs and AAs.
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Affiliation(s)
- R.A. Othman
- Department of Human Nutritional Sciences, The University of Manitoba and Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface General Hospital Research Centre, Winnipeg, Canada
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Contreras AV, Cocom-Chan B, Hernandez-Montes G, Portillo-Bobadilla T, Resendis-Antonio O. Host-Microbiome Interaction and Cancer: Potential Application in Precision Medicine. Front Physiol 2016; 7:606. [PMID: 28018236 PMCID: PMC5145879 DOI: 10.3389/fphys.2016.00606] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 11/21/2016] [Indexed: 12/19/2022] Open
Abstract
It has been experimentally shown that host-microbial interaction plays a major role in shaping the wellness or disease of the human body. Microorganisms coexisting in human tissues provide a variety of benefits that contribute to proper functional activity in the host through the modulation of fundamental processes such as signal transduction, immunity and metabolism. The unbalance of this microbial profile, or dysbiosis, has been correlated with the genesis and evolution of complex diseases such as cancer. Although this latter disease has been thoroughly studied using different high-throughput (HT) technologies, its heterogeneous nature makes its understanding and proper treatment in patients a remaining challenge in clinical settings. Notably, given the outstanding role of host-microbiome interactions, the ecological interactions with microorganisms have become a new significant aspect in the systems that can contribute to the diagnosis and potential treatment of solid cancers. As a part of expanding precision medicine in the area of cancer research, efforts aimed at effective treatments for various kinds of cancer based on the knowledge of genetics, biology of the disease and host-microbiome interactions might improve the prediction of disease risk and implement potential microbiota-directed therapeutics. In this review, we present the state of the art of sequencing and metabolome technologies, computational methods and schemes in systems biology that have addressed recent breakthroughs of uncovering relationships or associations between microorganisms and cancer. Together, microbiome studies extend the horizon of new personalized treatments against cancer from the perspective of precision medicine through a synergistic strategy integrating clinical knowledge, HT data, bioinformatics, and systems biology.
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Affiliation(s)
| | - Benjamin Cocom-Chan
- Instituto Nacional de Medicina GenómicaMexico City, Mexico; Human Systems Biology Laboratory, Instituto Nacional de Medicina GenómicaMexico City, Mexico
| | - Georgina Hernandez-Montes
- Coordinación de la Investigación Científica, Red de Apoyo a la Investigación-National Autonomous University of Mexico (UNAM) Mexico City, Mexico
| | - Tobias Portillo-Bobadilla
- Coordinación de la Investigación Científica, Red de Apoyo a la Investigación-National Autonomous University of Mexico (UNAM) Mexico City, Mexico
| | - Osbaldo Resendis-Antonio
- Instituto Nacional de Medicina GenómicaMexico City, Mexico; Human Systems Biology Laboratory, Instituto Nacional de Medicina GenómicaMexico City, Mexico; Coordinación de la Investigación Científica, Red de Apoyo a la Investigación-National Autonomous University of Mexico (UNAM)Mexico City, Mexico
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Abstract
Colorectal cancer is one of the so-called westernized diseases and the second leading cause of cancer death worldwide. On the basis of global epidemiological and scientific studies, evidence suggests that the risk of colorectal cancer is increased by processed and unprocessed meat consumption but suppressed by fibre, and that food composition affects colonic health and cancer risk via its effects on colonic microbial metabolism. The gut microbiota can ferment complex dietary residues that are resistant to digestion by enteric enzymes. This process provides energy for the microbiota but culminates in the release of short-chain fatty acids including butyrate, which are utilized for the metabolic needs of the colon and the body. Butyrate has a remarkable array of colonic health-promoting and antineoplastic properties: it is the preferred energy source for colonocytes, it maintains mucosal integrity and it suppresses inflammation and carcinogenesis through effects on immunity, gene expression and epigenetic modulation. Protein residues and fat-stimulated bile acids are also metabolized by the microbiota to inflammatory and/or carcinogenic metabolites, which increase the risk of neoplastic progression. This Review will discuss the mechanisms behind these microbial metabolite effects, which could be modified by diet to achieve the objective of preventing colorectal cancer in Western societies.
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Engels C, Schwab C, Zhang J, Stevens MJA, Bieri C, Ebert MO, McNeill K, Sturla SJ, Lacroix C. Acrolein contributes strongly to antimicrobial and heterocyclic amine transformation activities of reuterin. Sci Rep 2016; 6:36246. [PMID: 27819285 PMCID: PMC5098142 DOI: 10.1038/srep36246] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 09/21/2016] [Indexed: 02/08/2023] Open
Abstract
Glycerol/diol dehydratases catalyze the conversion of glycerol to 3-hydroxypropionaldehyde (3-HPA), the basis of a multi-component system called reuterin. Reuterin has antimicrobial properties and undergoes chemical conjugation with dietary heterocyclic amines (HCAs). In aqueous solution reuterin is in dynamic equilibrium with the toxicant acrolein. It was the aim of this study to investigate the extent of acrolein formation at various physiological conditions and to determine its role in biological and chemical activities. The application of a combined novel analytical approach including IC-PAD, LC-MS and NMR together with specific acrolein scavengers suggested for the first time that acrolein, and not 3-HPA, is the active compound responsible for HCA conjugation and antimicrobial activity attributed to reuterin. As formation of the HCA conjugate was observed in vivo, our results imply that acrolein is formed in the human gut with implications on detoxification of HCAs. We propose to re-define the term reuterin to include acrolein.
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Affiliation(s)
- Christina Engels
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Clarissa Schwab
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Jianbo Zhang
- Laboratory of Food Nutrition and Toxicology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Marc J. A. Stevens
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Corinne Bieri
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Marc-Olivier Ebert
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Sciences, ETH Zurich, Zurich, Switzerland
| | - Kristopher McNeill
- Laboratory of Environmental Chemistry, Institute of Biogeochemistry and Pollutant Dynamics, Department of Environmental Systems Science, ETH Zurich, Zurich, Switzerland
| | - Shana J. Sturla
- Laboratory of Food Nutrition and Toxicology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Christophe Lacroix
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
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Coleman OI, Nunes T. Role of the Microbiota in Colorectal Cancer: Updates on Microbial Associations and Therapeutic Implications. Biores Open Access 2016; 5:279-288. [PMID: 27790385 PMCID: PMC5076480 DOI: 10.1089/biores.2016.0028] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Genetic, environmental, and dietary factors have been found to influence the development and progression of colorectal cancer (CRC). More recently, accumulating evidence associates the intestinal microbiota with the initiation and progression of this disease. While studies have shown that individuals with CRC display alterations in gut bacterial composition, it remains somewhat unclear whether such differences drive cancer development or whether they are a response to tumorigenesis. In this review, the authors assess new evidence linking the community structure or specific bacterial factors of the intestinal microbiota to CRC development and progression, with insights into therapeutic implications.
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Affiliation(s)
- Olivia I Coleman
- Chair of Nutrition and Immunology, ZIEL-Research Center for Nutrition and Food Sciences, Technical University of Munich , Freising, Germany
| | - Tiago Nunes
- Chair of Nutrition and Immunology, ZIEL-Research Center for Nutrition and Food Sciences, Technical University of Munich , Freising, Germany
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Jacobs S, Harmon BE, Ollberding NJ, Wilkens LR, Monroe KR, Kolonel LN, Le Marchand L, Boushey CJ, Maskarinec G. Among 4 Diet Quality Indexes, Only the Alternate Mediterranean Diet Score Is Associated with Better Colorectal Cancer Survival and Only in African American Women in the Multiethnic Cohort. J Nutr 2016; 146:1746-55. [PMID: 27511927 PMCID: PMC4997287 DOI: 10.3945/jn.116.234237] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 07/05/2016] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is the second leading cause of cancer-related death in the United States, with a 5-y survival rate of ∼65%. Therefore, the identification of modifiable health factors to improve CRC survival is crucial. OBJECTIVE We investigated the association of 4 prediagnostic a priori diet quality indexes with CRC-specific and all-cause mortality in the Multiethnic Cohort (MEC). METHODS The MEC included >215,000 African-American, Native Hawaiian, Japanese-American, Latino, and white adults living in Hawaii and California who completed a validated quantitative food-frequency questionnaire in 1993-1996. CRC cases and deaths were identified through linkages to cancer registries and to state and national vital registries. Sex-specific HRs and 95% CIs were estimated for the Healthy Eating Index (HEI) 2010, the Alternative HEI (AHEI) 2010, the alternate Mediterranean Diet (aMED) score, and the Dietary Approaches to Stop Hypertension (DASH) index with CRC-specific and overall mortality as the primary outcomes. Ethnicity-specific analyses were the secondary outcomes. RESULTS Among 4204 MEC participants diagnosed with invasive CRC through 2010, 1976 all-cause and 1095 CRC-specific deaths were identified. A higher aMED score was associated with lower CRC-specific mortality in women [HR continuous pattern score divided by its respective SD (HR1SD): 0.86; 95% CI: 0.77, 0.96] but not in men (HR1SD: 1.01; 95% CI: 0.92, 1.11). A higher aMED score was also associated with lower all-cause mortality in women (HR1SD: 0.88; 95% CI: 0.81, 0.96) but not in men (HR1SD: 1.00; 95% CI: 0.93, 1.07). The HEI-2010, AHEI-2010, and DASH index were not significantly associated with CRC-specific or with all-cause mortality. The inverse relation for the aMED score was limited to African Americans and to colon (compared with rectal) cancer. CONCLUSIONS The aMED score was related to lower mortality only in African-American women (1 of 5 ethnic groups studied). The results should be interpreted with caution due to the small numbers of cases within ethnic groups and the issue of multiple testing.
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Affiliation(s)
| | - Brook E Harmon
- School of Public Health, University of Memphis, Memphis, TN
| | | | | | - Kristine R Monroe
- University of Southern California, Health Sciences Campus, Los Angeles, CA
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Ng O. Iron, microbiota and colorectal cancer. Wien Med Wochenschr 2016; 166:431-436. [PMID: 27577249 DOI: 10.1007/s10354-016-0508-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 07/27/2016] [Indexed: 12/21/2022]
Abstract
Iron deficiency and anaemia are common in colorectal cancer. Replacement with oral or intravenous iron effectively treats this deficiency. However, mechanistic and population studies suggest that excess iron promotes colorectal carcinogenesis. Growing research into gut microbiota and dysbiosis suggests one explanation for this association. Iron is growth limiting for many pathogenic bacteria and may promote a shift in the ratio of pathogenic to protective bacteria. This may increase the toxic bacterial metabolites, promoting inflammation and carcinogenesis. This has important implications as we seek to correct anaemia in our patients.
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Affiliation(s)
- Oliver Ng
- Clinical Research Fellow, Queens Medical Centre, Nottingham Digestive Disease Centre, E Floor West Block, Derby Rd, NG7 2UH, Nottingham, UK.
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Hoedt EC, Cuív PÓ, Morrison M. Methane matters: from blue-tinged moos, to boozy roos, and the health of humans too. Anim Front 2016. [DOI: 10.2527/af.2016-0029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Affiliation(s)
- Emily C. Hoedt
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072 Australia
| | - Páraic Ó Cuív
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD, 4102 Australia
| | - Mark Morrison
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD, 4102 Australia
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Pop M, Paulson JN, Chakraborty S, Astrovskaya I, Lindsay BR, Li S, Bravo HC, Harro C, Parkhill J, Walker AW, Walker RI, Sack DA, Stine OC. Individual-specific changes in the human gut microbiota after challenge with enterotoxigenic Escherichia coli and subsequent ciprofloxacin treatment. BMC Genomics 2016; 17:440. [PMID: 27277524 PMCID: PMC4898365 DOI: 10.1186/s12864-016-2777-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 05/25/2016] [Indexed: 01/01/2023] Open
Abstract
Background Enterotoxigenic Escherichia coli (ETEC) is a major cause of diarrhea in inhabitants from low-income countries and in visitors to these countries. The impact of the human intestinal microbiota on the initiation and progression of ETEC diarrhea is not yet well understood. Results We used 16S rRNA (ribosomal RNA) gene sequencing to study changes in the fecal microbiota of 12 volunteers during a human challenge study with ETEC (H10407) and subsequent treatment with ciprofloxacin. Five subjects developed severe diarrhea and seven experienced few or no symptoms. Diarrheal symptoms were associated with high concentrations of fecal E. coli as measured by quantitative culture, quantitative PCR, and normalized number of 16S rRNA gene sequences. Large changes in other members of the microbiota varied greatly from individual to individual, whether or not diarrhea occurred. Nonetheless the variation within an individual was small compared to variation between individuals. Ciprofloxacin treatment reorganized microbiota populations; however, the original structure was largely restored at one and three month follow-up visits. Conclusion Symptomatic ETEC infections, but not asymptomatic infections, were associated with high fecal concentrations of E. coli. Both infection and ciprofloxacin treatment caused variable changes in other bacteria that generally reverted to baseline levels after three months. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2777-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mihai Pop
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, MD, USA.,Department of Computer Science, University of Maryland, College Park, MD, USA
| | - Joseph N Paulson
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, MD, USA.,Graduate Program in Applied Mathematics & Scientific Computation, University of Maryland, College Park, MD, USA.,Department of Biostatistics and Computational Biology, Dana Farber Cancer Institute, Boston, MA, USA.,Department of Biostatistics, Harvard School of Public Health, Boston, MA, USA
| | | | - Irina Astrovskaya
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, MD, USA
| | - Brianna R Lindsay
- School of Medicine, University of Maryland, Baltimore, MD, USA.,Merck & Co. Inc, North Wales, PA, USA
| | - Shan Li
- School of Medicine, University of Maryland, Baltimore, MD, USA
| | - Héctor Corrada Bravo
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, MD, USA.,Department of Computer Science, University of Maryland, College Park, MD, USA
| | - Clayton Harro
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Julian Parkhill
- Pathogen Genomics Group, Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, UK
| | - Alan W Walker
- Pathogen Genomics Group, Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, UK.,Microbiology Group, Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen, UK
| | | | - David A Sack
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - O Colin Stine
- School of Medicine, University of Maryland, Baltimore, MD, USA.
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48
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Abstract
The food we consume feeds not only us, but also a vast and diverse community of microbiota within our gastrointestinal tract. In a process of symbiotic co-evolution, the gut microbiota became essential for the maintenance of the health and integrity of our colon. The advent of next-generation DNA sequencing technology and metabolic profiling have, in the recent years, revealed the remarkable complexity of microbial diversity and function, and that the microbiota produce a wide variety of bioactive products that are not only active at the mucosal surface, but also absorbed and circulated throughout the body, influencing distant organ health and function. As a result, several microbiota compositional patterns and their associations with both health and disease states have been identified. Importantly, a disturbed microbiota-host relationship, termed dysbiosis, is now recognized to be the root cause for a growing list of diseases, including colorectal cancer (CRC). There is mounting in vitro and in vivo evidence to suggest that diet selects for the microbiota composition and several health promoting and deleterious effects of diet are, in fact, mediated by the microbiota. Recent findings of the feasibility of dietary fiber to boost the colonic microbial synthesis of anti-proliferative and counter carcinogenic metabolites, particularly butyrate, underscores the prerequisite of dietary modification as a key measure to curb the pandemic of CRC in westernized countries. Better understanding of the diet-microbiota interplay and large-scale studies to evaluate the efficacy of dietary modification and gut microbiota modulation in reversing dysbiosis and restoring health could offer novel preventative and/or therapeutic strategies against westernized diseases, which are now considered the chief threat to public health.
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Affiliation(s)
- Kishore Vipperla
- Division of General Internal Medicine, University of Pittsburgh Medical Center, 200 Lothrop Street, 933W MUH, Pittsburgh, PA 15213, USA.
| | - Stephen J O'Keefe
- Division of Gastroenterology, Hepatology, and Nutrition, University of Pittsburgh School of Medicine, 200 Lothrop Street, PUH, Mezzanine Level - C Wing, Pittsburgh, PA 15213, USA.
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49
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Fekry MI, Engels C, Zhang J, Schwab C, Lacroix C, Sturla SJ, Chassard C. The strict anaerobic gut microbe Eubacterium hallii transforms the carcinogenic dietary heterocyclic amine 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP). ENVIRONMENTAL MICROBIOLOGY REPORTS 2016; 8:201-209. [PMID: 26711372 DOI: 10.1111/1758-2229.12369] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 12/15/2015] [Indexed: 06/05/2023]
Abstract
2-Amino-1-methyl-6-phenylimidazo(4,5-b)pyridine (PhIP) is the most abundant food-derived heterocyclic aromatic amine in well-cooked meats and may contribute to the recognized carcinogenicity of processed meats. In this study, a panel of human gut microbes was tested for their ability to convert PhIP to a conjugate PhIP-M1. Eubacterium hallii was newly identified to catalyse the conversion of PhIP to PhIP-M1 with high efficiency. The reaction was shown to involve the metabolism of glycerol to 3-hydroxypropionaldehyde as a key pathway. The proficiency of E. hallii in transforming PhIP in the presence of a complex intestinal microbiota was confirmed using batch fermentations inoculated with effluents from a continuous intestinal fermentation model mimicking human proximal and distal colon microbiota. In batch fermentations inoculated with proximal colon microbiota, PhIP-M1 transformation corresponded to an up to 300-fold increase of E. hallii. In contrast, PhIP transformation of distal colon microbiota was low but increased by 120-fold after supplementation with E. hallii. These findings indicate for the first time the relevance of the abundant commensal strict anaerobe E. hallii in the transformation of a dietary carcinogen that could contribute to its detoxification in the human colon.
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Affiliation(s)
- Mostafa I Fekry
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Christina Engels
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Jianbo Zhang
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Clarissa Schwab
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Christophe Lacroix
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Shana J Sturla
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Christophe Chassard
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
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50
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Praveen V, Praveen S. Microbiome-Gut-Brain Axis: A Pathway for Improving Brainstem Serotonin Homeostasis and Successful Autoresuscitation in SIDS-A Novel Hypothesis. Front Pediatr 2016; 4:136. [PMID: 28111624 PMCID: PMC5216028 DOI: 10.3389/fped.2016.00136] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 11/30/2016] [Indexed: 12/16/2022] Open
Abstract
Sudden infant death syndrome (SIDS) continues to be a major public health issue. Following its major decline since the "Back to Sleep" campaign, the incidence of SIDS has plateaued, with an annual incidence of about 1,500 SIDS-related deaths in the United States and thousands more throughout the world. The etiology of SIDS, the major cause of postneonatal mortality in the western world, is still poorly understood. Although sleeping in prone position is a major risk factor, SIDS continues to occur even in the supine sleeping position. The triple-risk model of Filiano and Kinney emphasizes the interaction between a susceptible infant during a critical developmental period and stressor/s in the pathogenesis of SIDS. Recent evidence ranges from dysregulated autonomic control to findings of altered neurochemistry, especially the serotonergic system that plays an important role in brainstem cardiorespiratory/thermoregulatory centers. Brainstem serotonin (5-HT) and tryptophan hydroxylase-2 (TPH-2) levels have been shown to be lower in SIDS, supporting the evidence that defects in the medullary serotonergic system play a significant role in SIDS. Pathogenic bacteria and their enterotoxins have been associated with SIDS, although no direct evidence has been established. We present a new hypothesis that the infant's gut microbiome, and/or its metabolites, by its direct effects on the gut enterochromaffin cells, stimulates the afferent gut vagal endings by releasing serotonin (paracrine effect), optimizing autoresuscitation by modulating brainstem 5-HT levels through the microbiome-gut-brain axis, thus playing a significant role in SIDS during the critical period of gut flora development and vulnerability to SIDS. The shared similarities between various risk factors for SIDS and their relationship with the infant gut microbiome support our hypothesis. Comprehensive gut-microbiome studies are required to test our hypothesis.
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Affiliation(s)
| | - Shama Praveen
- Providence Little Company of Mary Medical Center , Torrance, CA , USA
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