The potential for nasal delivery of losartan, a drug with poor oral bioavailability, was investigated using Calu-3 cells. Epithelial permeation of the drug with or without dimethyl-beta-cyclodextrin (DM-beta-CD) and glycocholate was investigated. Possible transport mechanism of the compound and epithelial mucosal tolerance were screened. Reversibility of epithelial membrane perturbation was als...

Chirayath, Mary V., Leszek Gajdzik, Wolfgang Hulla, Jürg Graf, Heide S. Cross, and Meinrad Peterlik. Vitamin D increases tight-junction conductance and paracellular Ca21 transport in Caco-2 cell cultures. Am. J. Physiol. 274 (Gastrointest. Liver Physiol. 37): G389–G396, 1998.—We investigated the effects of 1a,25-dihydroxyvitamin D3 [1,25(OH)2D3] on paracellular intestinal Ca21 absorption by det...

During intestinal invasion, Entamoeba histolytica opens tight junctions (TJs) reflected by transepithelial electrical resistance (TEER) dropping. To explore the molecular mechanisms underlying this, we studied in vitro and in vivo the damage produced by the recombinant E. histolytica cysteine protease (rEhCP112) on TJ functions and proteins. rEhCP112 reduced TEER in Caco-2 cells in a dose- and ...

The blood-air barrier in the lung consists of the alveolar epithelium, the underlying capillary endothelium, their basement membranes and the interstitial space between the cell layers. Little is known about the interactions between the alveolar and the blood compartment. The aim of the present study was to gain first insights into the possible interplay between these two neighbored cell layers...

Blood–brain barrier (BBB) dysfunction is a key hallmark in the pathology of many neuroinflammatory disorders. Extracellular vesicles (EVs) are lipid membrane-enclosed carriers molecular cargo that involved cell-to-cell communication. Circulating endothelial EVs increased plasma patients with neurological disorders, and immune cell-derived known to modulate cerebrovascular functions. However, li...

BACKGROUND Intestinal barrier dysfunction is not only the consequence of liver cirrhosis, but also an active participant in the development of liver cirrhosis. Previous studies showed that external administration of insulin-like growth factor 1 (IGF-1) improved intestinal barrier function in liver cirrhosis. However, the mechanism of IGF-1 on intestinal barrier in liver cirrhosis is not fully e...

Abstract Background Mitral regurgitation (MR) and cardiac amyloidosis (CA) both primarily affect older patients. Data on co-existence prognostic implications of MR CA are currently lacking. Purpose We aimed to identify prevalence, clinical characteristics outcomes MR-CA compared lone MR. Methods Consecutive patients undergoing transcatheter edge-to-edge repair (TEER) for were screened concomita...

BeWo cells derived from a choriocarcinoma have been extensively used as a model of placental trophoblast. There are several clones of the BeWo cell line. Authentication and characterisation of these cloned cell lines is important to ensure their identity and purity prior to use in research. In order to be classified as cytotrophoblasts, cells need to fulfil certain criteria including the expres...