Catherine O'Reilly, Susan Mills, Mary C Rea, Aonghus Lavelle, Subrata Ghosh, Colin Hill, R Paul Ross
{"title":"Interplay between inflammatory bowel disease therapeutics and the gut microbiome reveals opportunities for novel treatment approaches.","authors":"Catherine O'Reilly, Susan Mills, Mary C Rea, Aonghus Lavelle, Subrata Ghosh, Colin Hill, R Paul Ross","doi":"10.20517/mrr.2023.41","DOIUrl":"10.20517/mrr.2023.41","url":null,"abstract":"<p><p>Inflammatory bowel disease (IBD) is a complex heterogeneous disorder defined by recurring chronic inflammation of the gastrointestinal tract, attributed to a combination of factors including genetic susceptibility, altered immune response, a shift in microbial composition/microbial insults (infection/exposure), and environmental influences. Therapeutics generally used to treat IBD mainly focus on the immune response and include non-specific anti-inflammatory and immunosuppressive therapeutics and targeted therapeutics aimed at specific components of the immune system. Other therapies include exclusive enteral nutrition and emerging stem cell therapies. However, in recent years, scientists have begun to examine the interplay between these therapeutics and the gut microbiome, and we present this information here. Many of these therapeutics are associated with alterations to gut microbiome composition and functionality, often driving it toward a \"healthier profile\" and preclinical studies have revealed that such alterations can play an important role in therapeutic efficacy. The gut microbiome can also improve or hinder IBD therapeutic efficacy or generate undesirable metabolites. For certain IBD therapeutics, the microbiome composition, particularly before treatment, may serve as a biomarker of therapeutic efficacy. Utilising this information and manipulating the interactions between the gut microbiome and IBD therapeutics may enhance treatment outcomes in the future and bring about new opportunities for personalised, precision medicine.</p>","PeriodicalId":94376,"journal":{"name":"Microbiome research reports","volume":"2 ","pages":"35"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7615213/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41242966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mariachiara Mengoli, Gabriele Conti, Marco Fabbrini, Marco Candela, Patrizia Brigidi, Silvia Turroni, Monica Barone
{"title":"Microbiota-gut-brain axis and ketogenic diet: how close are we to tackling epilepsy?","authors":"Mariachiara Mengoli, Gabriele Conti, Marco Fabbrini, Marco Candela, Patrizia Brigidi, Silvia Turroni, Monica Barone","doi":"10.20517/mrr.2023.24","DOIUrl":"10.20517/mrr.2023.24","url":null,"abstract":"<p><p>The microbiota-gut-brain axis refers to the intricate bidirectional communication between commensal microorganisms residing in the digestive tract and the central nervous system, along neuroendocrine, metabolic, immune, and inflammatory pathways. This axis has been suggested to play a role in several neurological disorders, such as Parkinson's disease, Alzheimer's disease, multiple sclerosis, and epilepsy, paving the way for microbiome-based intervention strategies for the mitigation and treatment of symptoms. Epilepsy is a multifaceted neurological condition affecting more than 50 million individuals worldwide, 30% of whom do not respond to conventional pharmacological therapies. Among the first-hand microbiota modulation strategies, nutritional interventions represent an easily applicable option in both clinical and home settings. In this narrative review, we summarize the mechanisms underlying the microbiota-gut-brain axis involvement in epilepsy, discuss the impact of antiepileptic drugs on the gut microbiome, and then the impact of a particular dietary pattern, the ketogenic diet, on the microbiota-gut-brain axis in epileptic patients. The investigation of the microbiota response to non-pharmacological therapies is an ever-expanding field with the potential to allow the design of increasingly accessible and successful intervention strategies.</p>","PeriodicalId":94376,"journal":{"name":"Microbiome research reports","volume":"1 1","pages":"32"},"PeriodicalIF":0.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10688818/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81337422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marco Fabbrini, Daniel Scicchitano, Marco Candela, Silvia Turroni, Simone Rampelli
{"title":"Connect the dots: sketching out microbiome interactions through networking approaches.","authors":"Marco Fabbrini, Daniel Scicchitano, Marco Candela, Silvia Turroni, Simone Rampelli","doi":"10.20517/mrr.2023.25","DOIUrl":"10.20517/mrr.2023.25","url":null,"abstract":"<p><p>Microbiome networking analysis has emerged as a powerful tool for studying the complex interactions among microorganisms in various ecological niches, including the human body and several environments. This analysis has been used extensively in both human and environmental studies, revealing key taxa and functional units peculiar to the ecosystem considered. In particular, it has been mainly used to investigate the effects of environmental stressors, such as pollution, climate change or therapies, on host-associated microbial communities and ecosystem function. In this review, we discuss the latest advances in microbiome networking analysis, including methods for constructing and analyzing microbiome networks, and provide a case study on how to use these tools. These analyses typically involve constructing a network that represents interactions among microbial taxa or functional units, such as genes or metabolic pathways. Such networks can be based on a variety of data sources, including 16S rRNA sequencing, metagenomic sequencing, and metabolomics data. Once constructed, these networks can be analyzed to identify key nodes or modules important for the stability and function of the microbiome. By providing insights into essential ecological features of microbial communities, microbiome networking analysis has the potential to transform our understanding of the microbial world and its impact on human health and the environment.</p>","PeriodicalId":94376,"journal":{"name":"Microbiome research reports","volume":"2 4","pages":"25"},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10696587/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138500662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pedro Fernandez-Julia, Daniel M Commane, Douwe van Sinderen, Jose Munoz-Munoz
{"title":"Cross-feeding interactions between human gut commensals belonging to the <i>Bacteroides</i> and <i>Bifidobacterium</i> genera when grown on dietary glycans.","authors":"Pedro Fernandez-Julia, Daniel M Commane, Douwe van Sinderen, Jose Munoz-Munoz","doi":"10.20517/mrr.2021.05","DOIUrl":"10.20517/mrr.2021.05","url":null,"abstract":"<p><p>Elements of the human gut microbiota metabolise many host- and diet-derived, non-digestible carbohydrates (NDCs). Intestinal fermentation of NDCs salvages energy and resources for the host and generates beneficial metabolites, such as short chain fatty acids, which contribute to host health. The development of functional NDCs that support the growth and/or metabolic activity of specific beneficial gut bacteria, is desirable, but dependent on an in-depth understanding of the pathways of carbohydrate fermentation. The purpose of this review is to provide an appraisal of what is known about the roles of, and interactions between, <i>Bacteroides</i> and <i>Bifidobacterium</i> as key members involved in NDC utilisation. <i>Bacteroides</i> is considered an important primary degrader of complex NDCs, thereby generating oligosaccharides, which in turn can be fermented by secondary degraders<i>.</i> In this review, we will therefore focus on <i>Bacteroides</i> as an NDC-degrading specialist and <i>Bifidobacterium</i> as an important and purported probiotic representative of secondary degraders. We will describe cross-feeding interactions between members of these two genera. We note that there are limited studies exploring the interactions between <i>Bacteroides</i> and <i>Bifidobacterium</i>, specifically concerning β-glucan and arabinoxylan metabolism. This review therefore summarises the roles of these organisms in the breakdown of dietary fibre and the molecular mechanisms and interactions involved. Finally, it also highlights the need for further research into the phenomenon of cross-feeding between these organisms for an improved understanding of these cross-feeding mechanisms to guide the rational development of prebiotics to support host health or to prevent or combat disease associated with microbial dysbiosis.</p>","PeriodicalId":94376,"journal":{"name":"Microbiome research reports","volume":"1 2","pages":"12"},"PeriodicalIF":0.0,"publicationDate":"2022-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10688802/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138479961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}