Dysbiosis—An Etiological Factor for Cardiovascular Diseases and the Therapeutic Benefits of Gut Microflora (original) (raw)

Understanding connections and roles of gut microbiome in cardiovascular diseases

Canadian Journal of Microbiology, 2021

The gut microbiome encompasses trillions of residing microbes, mainly bacteria, which play a crucial role in maintaining the physiological and metabolic health of the host. The gut microbiome has been associated with several diseases, including cardiovascular disease (CVD). A growing body of evidence suggests that an altered gut environment and gut-microbiome-derived metabolites are associated with CVD events. The gut microbiome communicates with host physiology through different mechanisms, including trimethylamine N-oxide generation, primary and secondary bile acid metabolism pathways, and short-chain fatty acids production. The main focus of this review is to understand the association of the gut microbiome with CVD and its implications on the interactions between the gut microbiome and the host. Manipulation of the gut microbiome through specific dietary intervention is a simple approach to identifying novel targets for therapy or better dietary recommendations, and new preventi...

The Gut Microbiome and Cardiovascular Disease

Cureus, 2021

Cardiovascular disease (CVD) is currently the leading cause of death worldwide. Although many well-known conditions cause CVD, recent research has suggested that alterations to the gut microbiome may also promote CVD. The gastrointestinal tract houses trillions of bacteria, some of which in large numbers are considered to be part of a healthy gut microbiome profile. These "good" bacteria have the ability to process and digest complex carbohydrates into short-chain fatty acids (SFCA). These SCFA serve as signaling molecules, immune-modulating molecules, and sources of energy. However, with gut dysbiosis, there is an overgrowth of certain bacteria and these bacteria overly produce phosphatidylcholine, choline, and carnitine into the waste product trimethylamine-N-oxide (TMAO). Elevated TMAO levels are associated with an increased risk of atherosclerosis, myocardial infarction, thrombosis, and stroke. Therefore, introducing therapeutic interventions that alter a dysbiotic gut profile back to a healthy gut microbiome may be the key to reducing the incidence of cardiovascular disease in some conditions. The purpose of this review is to critically examine and consolidate the relevant information bearing on this concept. Our goal is to provide the informational framework for the possible use of microbiome modification as an optional therapeutic modality.

The Gut Microbiota (Microbiome) in Cardiovascular Disease and Its Therapeutic Regulation

Frontiers in Cellular and Infection Microbiology

In the last two decades, considerable interest has been shown in understanding the development of the gut microbiota and its internal and external effects on the intestine, as well as the risk factors for cardiovascular diseases (CVDs) such as metabolic syndrome. The intestinal microbiota plays a pivotal role in human health and disease. Recent studies revealed that the gut microbiota can affect the host body. CVDs are a leading cause of morbidity and mortality, and patients favor death over chronic kidney disease. For the function of gut microbiota in the host, molecules have to penetrate the intestinal epithelium or the surface cells of the host. Gut microbiota can utilize trimethylamine, N-oxide, short-chain fatty acids, and primary and secondary bile acid pathways. By affecting these living cells, the gut microbiota can cause heart failure, atherosclerosis, hypertension, myocardial fibrosis, myocardial infarction, and coronary artery disease. Previous studies of the gut microbio...

The link between gut microbiota and atherosclerosis

Indian Journal of Clinical Anatomy and Physiology, 2023

Infections have been linked to development of cardiovascular complaint and atherosclerosis. Cardio vascular conditions like atherosclerosis are the major cause of mortality and morbidity in the ultramodern society. The rupture of atherosclerotic plaque can induce thrombus conformation, which is the main cause of acute cardiovascular events. Lately, numerous studies have demonstrated that there are some connections between microbiota and atherosclerosis. There are three metabolite pathways by which gut microbiota can affect atherosclerosis. Either original or distant- causing inflammation which might lead to atherosclerotic plaque formation and rupture. Second, metabolism of lipids and cholesterol by gut microbiota can affect atheromatous atheromatous plaque conformation. Third, diet and specific factors that are metabolized by gut microbiota can have various effects on atherosclerosis; for illustration, salutary fiber is beneficial, whereas the bacterial metabolite trimethylamine- N- oxide (TMAO) is considered dangerous. We'll conclude by discussing new remedial strategies for targeting gut microbiota to ameliorate atherosclerosis and related cardiovascular issues. Keywords: Atherosclerosis, Gut microbiome, Metabolites, Metabolism.

Nature of Human Gut Microbiome: How do they play in Cardiovascular Disease?

Journal of Cardiovascular Medicine and Cardiology, 2018

Cardiovascular disease is the number one killer of death around the world. Most of the cardiovascular diseases are caused by sedentary life style, bad eating habit, tobacco smoking, high alcohol intake, dyslipidemia and genetic factors .Recently the idea of human microbiome science has emerged in diseases pathogenesis .The human gut is a house of trillions of microbial fl oral. Since a couple of decades ago, there has been interesting insights into the human gut microbiota and have highlighted its increasingly association to cardiovascular (CV) and metabolic diseases. Trimethylamine N-oxide (TMAO), which is a metabolic product from gut microbiota plays a central role in cardiovascular disease pathogenesis. Nature of microbial inhabitants within the host has been noticed by the numbers of scientists and researchers to understand more about the hidden mechanism of diseases pathogenesis including cardiovascular disease, metabolic and autoimmune diseases and it has become a good hope to develop new drug designs to prevent metabolic and cardiovascular disease in near future.

Bridging the Gap between Gut Microbial Dysbiosis and Cardiovascular Diseases

Nutrients, 2017

The human gut is heavily colonized by a community of microbiota, primarily bacteria, that exists in a symbiotic relationship with the host and plays a critical role in maintaining host homeostasis. The consumption of a high-fat (HF) diet has been shown to induce gut dysbiosis and reduce intestinal integrity. Recent studies have revealed that dysbiosis contributes to the progression of cardiovascular diseases (CVDs) by promoting two major CVD risk factors-atherosclerosis and hypertension. Imbalances in host-microbial interaction impair homeostatic mechanisms that regulate health and can activate multiple pathways leading to CVD risk factor progression. Dysbiosis has been implicated in the development of atherosclerosis through metabolism-independent and metabolite-dependent pathways. This review will illustrate how these pathways contribute to the various stages of atherosclerotic plaque progression. In addition, dysbiosis can promote hypertension through vascular fibrosis and an alt...

Gut Microbiota and Cardiovascular Disease: Symbiosis Versus Dysbiosis

Curr Med Chem , 2021

The gut microbiome interacts with host physiology through various mechanisms, including the cardiovascular (CV) system. A healthy microbiome has the ability to process and digest complex carbohydrates into short-chain fatty acids (SCFA). These SCFA function as signaling molecules, immune-modulating molecules, and energy sources. However, when the microbiome is altered, it produces gut dysbiosis with overgrowth of certain bacteria that may lead to overproduction of trimethylamine-N-oxide (T-MAO) from the metabolism of phosphatidylcholine, choline, and carnitine; dysbiosis also leads to increased intestinal permeability allowing the microbiome-derived lipopolysaccharide (LPS), a bacterial endotoxin, to enter the blood circulation, triggering inflammatory responses. An altered gastrointestinal (GI) tract environment and microbiome-derived metabolites are associated with CV events. Disrupted content and function of the microbiome leading to elevated TMAO and LPS levels, altered bile acid metabolism pathways, and SCFA production are associated with an increased risk of CV diseases (CVD), including atherosclerosis, myocardial infarction, thrombosis, arrhythmias, and stroke. Therapeutic interventions that may favorably influence a dysbiotic GI tract profile and promote a healthy microbiome may benefit the CV system and lead to a reduction of CVD incidence in certain situations. These issues are herein reviewed with a focus on the spectrum of microbiota-related CVD, the mechanisms involved, and the potential use of microbiome modification as a possible therapeutic intervention.

Mechanisms, therapeutic implications, and methodological challenges of gut microbiota and cardiovascular diseases: a position paper by the ESC Working Group on Coronary Pathophysiology and Microcirculation

Cardiovascular Research

The human gut microbiota is the microbial ecosystem in the small and large intestines of humans. It has been naturally preserved and evolved to play an important role in the function of the gastrointestinal tract and the physiology of its host, protecting from pathogen colonization, and participating in vitamin synthesis, the functions of the immune system, as well as glucose homeostasis and lipid metabolism, among others. Mounting evidence from animal and human studies indicates that the composition and metabolic profiles of the gut microbiota are linked to the pathogenesis of cardiovascular disease, particularly arterial hypertension, atherosclerosis, and heart failure. In this review article, we provide an overview of the function of the human gut microbiota, summarize, and critically address the evidence linking compositional and functional alterations of the gut microbiota with atherosclerosis and coronary artery disease and discuss the potential of strategies for therapeutical...

Role of gut microbiota in the modulation of atherosclerosis-associated immune response

Frontiers in Microbiology, 2015

Inflammation and metabolic abnormalities are linked to each other. At present, pathogenic inflammatory response was recognized as a major player in metabolic diseases. In humans, intestinal microflora could significantly influence the development of metabolic diseases including atherosclerosis. Commensal bacteria were shown to activate inflammatory pathways through altering lipid metabolism in adipocytes, macrophages, and vascular cells, inducing insulin resistance, and producing trimethylamine-N-oxide. However, gut microbiota could also play the atheroprotective role associated with anthocyanin metabolism and administration of probiotics and their components. Here, we review the mechanisms by which the gut microbiota may influence atherogenesis.

Effects of Gut Microbiota on Cardiovascular Diseases

Scholars Journal of Applied Medical Sciences

Micro-organisms have always been a part of the ecosystem. In fact, they play a major role in balancing metabolism as they colonize the system. In the past two decades, studies about the human micro biome has been elevating and still continuing as it is perceived as a possible threat to health status or also could be promising and hope filling in novel therapeutics in the mere future. Despite many on-going debates about the relationship of gut bacteria to the physiopathology of cardiovascular diseases, it has been simultaneously established through ample amount of reports and studies conducted both in vivo and in vitro. In this review, we will be stressing on several studies emphasizing on the gut micro biome, their role in influencing the physiopathology of cardiovascular diseases while also reflecting CVD as a global health burden, factors affecting the differences in gut microbiota, gut dysbiosis and its effects on the hosts’ metabolism, the intervention of probiotics in balancing...