However, since the firmly adherent mucus layer in colon is shielding the epithelium from direct contact with bacteria and the Muc2 mucin deficient mouse lacking this mucus layer get a strong inflammation, we hypothesized that the inner mucus layer become deranged upon DSS treatment.
In both experimental models of IBD and in humans the mucus layer becomes more permeable to bacteria and is therefore considered critical etiological factors in this disease and possibly other intestinal disorders [ 28].
When mucus formed on top of colon explant cultures were exposed to 3% DSS, the thickness of the inner mucus layer decreased and became permeable to 2 µm fluorescent beads after 15 min. Both DSS and Dextran readily penetrated the mucus, but Dextran had no effect on thickness or permeability.
As we observed that the inner mucus layer on colon explants becomes permeable to 2 µm beads already after 15 min of DSS exposure, we asked if DSS could affect the inner mucus layer prior to inflammation in vivo.
However, MAP become trapped in the luminal mucus layer and, as a result, are largely eliminated from the respiratory tract by mucociliary escalator and expiratory clearance, which undermines their sustained release potential.
The preepithelial factors comprising tissue resistance include a mucus layer, unstirred water layer, and bicarbonate ions entrapped within these layers.
The composition of the mucus layer is complex and variable in time.
The viscoelastic behavior of the mucus layer is principally due to long-chain polymers known as mucins.
Our findings add to the knowledge base necessary in order to develop strategies to normalize the laryngeal mucus layer.
We designed a simple coarse-grained model of the glycocalyx layer, or adhesive mucus layer (AML), covered by mucus gel (luminal mucus layer) using a polymer lattice model and stochastic sampling (replica exchange Monte Carlo) for canonical ensemble simulations.
