Loading…
Changes in gut microbiota composition cause dysbiosis. Dysbiosis can happen due to antibiotics, infections, or drugs. The microbiota often returns to a healthy state, possibly with help from the immune system. However, if dysbiosis occurs repeatedly and the microbiota strays too far from health, interventions are needed to restore balance.
Imbalances within the gut microbial community structure that correlate with unfavorable inflammatory responses are increasingly recognized as being involved in disease processes and increasing frailty that affect many organ systems in the body
Dysbiosis = (taxa imbalance; disruption of the community leading to disruption of the microbe-host relationship)
The causes of a deviation of a biological system from its“normal” homeostatic state can be either environmental or internal
When the gut mucosa is impaired or disturbed, it can result in:
The composition of microbial communities varies more among dysbiotic individuals than among healthy individuals.
To treat the bacterial inflammation in the peritoneum, it is therefore imperative to treat the intestine
Although Bacterial Translocation / Intestinal permeability is a crucial physiological process for host immunity (), a “pathological translocation” has been repeatedly demonstrated, which is best illustrated in its clinical manifestation as Spontaneous bacterial peritonitis (SBP)
In this case, otherwise non-pathogenic intestinal bacteria are found in mesenteric lymph nodes and ascites, which leads to the observed local inflammation and clinical findings.
Therefore, treatment includes decontamination with oral antibiotics , which are mostly only effective in the intestine
A condition of dysbiosis favors uncontrolled passage of macromolecules, microorganisms, or their derivatives from the intestine to the systemic circulation, where they activate myelin-reactive T cells
Dysbiosis increases intestinal permeability in metabolic diseases (“Leaky Gut Syndrome / Leaky Gut ” concept)
This concept is based on the translocation of whole bacteria, bacterial products such as metabolites , and bacterial wall components into the circulation and removed tissues
Microbial dysbiosis may play important roles in various diseases, such as inflammation and cancers
Lv et al. 2019 World J Gastroenterol 25(18): 2149-2161
Dysbiosis means either a decrease in symbionts and commensals and/or an increase in pathobionts
Dysbiosis can result from challenges such as medications , infections , aging , lifestyle , surgery , and poor nutrition
Dethlefsen & Relman 2011 Proc Natl Acad Sci U S A. 108(Suppl 1): 4554-61
The term gut “dysbiosis” has been coined to encapsulate the perturbations in the structure of the complex Commensals communities, which can lead to deficient priming of the host immune system leading to a predisposition to develop immune-mediated diseases.
Interestingly, emerging evidence suggests that rather than 1 or 2 dominant organisms being responsible for host health, the composition of the entire microbial community contributes to a balanced immune response
Disruptions to the microbiome have been shown to be associated with severe pathologies of the host including metabolic diseases
Dysbiosis is an alteration in the Composition of the Gut Microbiota associated with pathology
Gut dysbiosis can stimulate the expression of TLR-4 and induce the upregulation of Blimp-1 , thereby inhibiting the expression of NLRP12 , which plays an important role in the development of UC
Dysbiosis may play a critical role in the development of Cancer, autoimmune disorders, increased susceptibility to infection
Dysbiosis is often associated with an enrichment of Proteobacteria (Pseudomonadota) and Enterobacteriaceae
Dysbiosis results in intestinal inflammation, a breakdown of the intestinal barrier, and translocation of microbial products in animal models.
Low Diversity in the Gut Microbiota is linked to to Adiposity / Obesity and Inflammatory Bowel Disease
Dysbiosis happens by: physiological changes in endogenous acid and bile secretion, by diet and bowel movements, by colonisation by pathogens , by consumption of antibiotics
Dysbiosis is influenced by age particularly in the 7th and 8th decades of life