From: Gut microbiota and the human gut physiological changes
Bacterial mucosal receptors | Observations in the gut | Physiological changes in the gut | Alternative remedies or mechanisms |
---|---|---|---|
E. coli binding to Neu5Gc-containing glycans | Influence the gut microbiota population and metabolism. | Cause stomach disorders (Sreevalsan and Safe, 2013) and loss of short chain fatty acids (SCFAs). | Diet rich in fibre promotes the growth of bacteria that generate SCFAs. |
Changes in mucosal glycosylation (due to inflammation) | Affects a low number among bacteriophages and less eradicating effects on bacteria specific for mucus-penetrating (Kamada et al., 2013). | The resulting dysbiosis is associated with intestinal permeability (Kamada et al., 2013). | Akkermansia muciniphila is a promising probiotics, improving metabolic functions and immune response (Zhang et al., 2019) |
Increased free fucose in the colon | Confers locus of Enterocyte Effacement (LEE) virulence genes produced by Enterohaemorrhagic E.coli (Wells et al., 2011). | LEE effacing lesion, leading to a brush border or lumen and microvili destruction, loss of ion and induce severe diarrhea. | Eat diet rich in fibre to supply SCFAs and fermented food to heal the gut. |
Thinner mucus in the distal colon (diet with Microbiota-accessible carbohydrates (MACs depletion) | Increases the proximity of microbes to the epithelium. | The expression of an inflammation marker REGIIIβ is increased (Gebhart et al., 2015). | Faecalibacterium prausnitzii has anti-inflammatory effects partially via the elevation of IL-10 production (Yan et al., 2008). TGF-β also suppresses an inflammatory response and mediates immune tolerance (Hornung et al., 2009). |
Shiga, bacterial toxins of type AB5 and pertussis toxins | Get adhered to the surface of intestinal glycan (Sreevalsan and Safe, 2013). | Influence the gut microbiota population and metabolism. Eventually cause stomach disorders (Sreevalsan and Safe, 2013). | Akkermansia muciniphila is a promising probiotic, improving metabolic functions and immune response (Zhang et al., 2019) |
Monosaccharide (from intestinal glycans) | Utilized by bacteria devoid of glycosidases. | Mediate a strong proliferating response leading to dysbiosis (Rahman et al., 2016). | Same intervention as above. |
Obstructed mucin glycosylation | Obstruction of carbohydrates for bacterial utilizing mucinglycans as source of carbon (Rahman et al., 2016) | Dysbiosis in the gut microbiota is the resulting consequences. | Same intervention as above. |
The junctional adhesion molecule A (JAM-A) knockout | Increase of Desulfovibrionaceae and decrease of Akkermansia (Kashiwagi et al., 2015) | Wound-induced inflammation and angiogenesis. | Probiotics, dietary fiber, antioxidants, mucosal nutrients stimulating digestive enzymes. |