Bacterial pathogens have evolved a wide range of strategies to colonize and invade human organs, despite the presence of multiple host defense mechanisms. In this review, we will describe how pathogenic bacteria can adhere and multiply at the surface of host cells, how some bacteria can enter and proliferate inside these cells, and finally how pathogens may cross epithelial or endothelial host ...

background: every year many organizations formulate a code of ethics (coe) but when it comes to implementing, it does not achieve the desired purposes. ineffectiveness of coes can stem from different factors and surely, one of them is bad formulation. this research was conducted to identify the barriers to effective formulation of coes in one of the main state universities of medical sciences i...

In higher eukaryotes, epithelial cell layers line most body cavities and form selective barriers that regulate the exchange of solutes between compartments. In order to fulfil these functions, the cells assume a polarised architecture and maintain two distinct plasma membrane domains, the apical domain facing the lumen and the basolateral domain facing other cells and the extracellular matrix. ...

Introduction EPH-ephrin interactions have important roles in cell adhesion-based process during inflammation such as the disruption of endothelial-epithelial barriers and adhesion of leukocytes to endothelial cells allowing leukocyte egress into the extracellular space and increasing the leakiness of the endothelial barrier. This is a similar phenomenon with hyeroxia-induced toxicity which is a...

Most solid tumors are of epithelial origin and, although malignant cells are de-differentiated, they maintain intercellular junctions, a key feature of epithelial cells, both in the primary tumor as well as in metastatic lesions. These intercellular junctions represent a protective mechanism against attacks by the host's immune system and pose as physical barriers that prevent intratumoral pene...

Epithelial cells line the lumens of organs including the gastrointestinal tract, kidney tubules and respiratory airways, where they regulate the transport of electrolytes and the movement of macromolecules. The current study aimed to investigate the transport of IGF-I across epithelial cell barriers. Epithelial cell lines derived from gut (IEC-6), kidney (MDBK) and lung (Mv1Lu) were shown to po...

the aim of this study was to investigate developmental barriers of sport for all in selected state universities of tehran city and to present strategies to developing it. the method of this study was descriptive-correlation and application in terms of aim. the statistical population consisted of all male and female faculty members of faculties of physical education and sport sciences of selecte...