Cell-Matrix Interactions Contribute to Barrier Function in Human Colon Organoids

Frontiers in Medicine

article

James Varani¹  Shannon D. McClintock¹  Muhammad N. Aslam¹ 

[1] The Department of Pathology, The University of Michigan Medical School

关键词: Aquamin®;    basement membrane;    cell-matrix adhesion;    cell-cell junction;    colonoid;    gut barrier;    laminin;    proteomics;   

DOI  :  10.3389/fmed.2022.838975

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

The importance of cell-matrix adhesion to barrier control in the colon is unclear. The goals of the present study were to: (i) determine if disruption of colon epithelial cell interactions with the extracellular matrix alters permeability control measurement and (ii) determine if increasing the elaboration of protein components of cell-matrix adhesion complexes can mitigate the effects of cell-matrix disruption. Human colon organoids were interrogated for transepithelial electrical resistance (TEER) under control conditions and in the presence of Aquamin®, a multi-mineral product. A function-blocking antibody directed at the C-terminal region of the laminin α chain was used in parallel. The effects of Aquamin® on cell-matrix adhesion protein expression were determined in a proteomic screen and by Western blotting. Aquamin® increased the expression of multiple basement membrane, hemidesmosomal and focal adhesion proteins as well as keratin 8 and 18. TEER values were higher in the presence of Aquamin® than they were under control conditions. The blocking antibody reduced TEER values under both conditions but was most effective in the absence of Aquamin®, where expression of cell-matrix adhesion proteins was lower to begin with. These findings provide evidence that cell-matrix interactions contribute to barrier control in the colon.

【 授权许可】

CC BY