Intestinal dysbiosis and permeability: the yin and yang in alcohol dependence and alcoholic liver disease.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic pathways without systematic search or original human data.
PubMed 29352076 · doi:10.1042/CS20171055
What was done
The authors reviewed literature regarding the biological mechanisms linking chronic alcohol consumption to alterations in gut microbiota composition and increased intestinal permeability. They synthesized evidence describing how gut-derived bacterial components and metabolites reach the portal and systemic circulation to mediate interactions along the gut-liver-brain axis.
What was found
The abstract reports no numerical data or effect sizes. It describes that chronic alcohol abuse leads to intestinal dysbiosis and barrier breakdown, allowing bacterial products to enter circulation and stimulate immune cells. The resulting release of pro-inflammatory cytokines contributes to liver inflammation and damage, as well as neuroinflammation associated with alterations in mood, cognition, and drinking behavior.
Why it matters
The paper outlines a gut-liver-brain pathophysiological framework connecting alcohol-induced gut barrier dysfunction to both hepatic disease progression and behavioral aspects of alcohol dependence.
Limits
This is an unsystematic narrative review rather than a primary clinical study or meta-analysis. The abstract provides no quantitative metrics, sample sizes, or distinctions between human clinical data and preclinical animal models.
Cited by
- supports Individuals who consume more than four drinks per day for men or more than three drinks per day for women, or who have alcohol use disorder, have poorer markers of gut health than social drinkers.