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Vascular endothelium is a semi‐permeable barrier that regulates the flow of nutrients, ions, cytokines and immune cells between blood and tissues. Barrier properties of endothelium, its ability to regenerate and the potential for secretion of inflammatory mediators play a crucial role in maintaining local tissue homeostasis. The lung vascular endothelial cells were shown to be infected by human rhinovirus (HRV) and generate antiviral, inflammatory and cytopathic responses. The current study reveals that in the long‐time manner, the lung vascular endothelium may efficiently limit the HRV replication via the IFN‐dependent 2′‐5′‐oligoadenylate synthetase 1 activation. This leads to the restoration of integrity accompanied by the up‐regulation of adherens and tight junctions, increase of metabolic activity and proliferation rate. Secondly, HRV16‐infected cells show delayed and transient up‐regulation of the expression of vascular endothelial growth factor (VEGF), fibroblast growth factor, angiopoietin 1 and 2, and neuropilin‐1, as well as VEGF receptors. The lung vascular endothelium infected with HRV may limit the infection, recover in time, and regain barrier properties and metabolic functions, thus leading to the restoration of integrated barrier tissue. [ABSTRACT FROM AUTHOR]

The Gastric pathogen Helicobacter pylori (HP) may influence the development of coronary heart disease (CHD). H. pylori induce reactive oxygen species (ROS), which transform cholesterol to 7-ketocholesterol (7-kCh), a CHD risk factor. Acetylsalicylic acid (ASA)—an Anti-aggregation drug used in CHD patients—may increase gastric bleeding and inflammation. We examined whether H. pylori driven ROS effects in the cell cultures of gastric epithelial cells (AGS) and vascular endothelial cells (HUVEC) progress in the milieu of 7-kCh and ASA. Cell cultures, exposed to 7-kCh or ASA alone or pulsed with the H. pylori antigenic complex—Glycine acid extract (GE), urease (UreA), cytotoxin associated gene A (CagA) protein or lipopolysaccharide (LPS), alone or with 7-kCh and ASA—were examined for ROS, apoptosis, cell integrity, interleukin (IL)-8, the activation of signal transducer, the activator of transcription 3 (STAT3), and wound healing. ASA and 7-kCh alone, and particularly in conjunction with H. pylori components, increased the ROS level and the rate of apoptosis, which was followed by cell disintegration, the activation of STAT3, and IL-8 elevation. AGS cells were unable to undergo wound healing. The cell ROS response to H. pylori components may be elevated by 7-kCh and ASA. [ABSTRACT FROM AUTHOR]

The effect of rhinovirus on airway epithelium is very well described. However, its influence on the vascular endothelium is unknown. The current study assesses the effect of rhinovirus HRV16 on the antiviral and inflammatory response in the human vascular endothelial cells (ECs). HRV16 increased IFN‐β, RANTES, and IP‐10 mRNA expression and protein release. HRV16 copy number in ECs reached maximal value 10 h after incubation. Increase in virus copies was accompanied by the enhancement of Toll‐ and RIG‐I‐like receptors: TLR3, RIG‐I, and MDA5. Additionally, HRV16 increased OAS‐1 and PKR mRNA expression, enzymes responsible for virus degradation and inhibition of replication. ICAM‐1 blockade decreased HRV16 copy number in ECs and inhibited IFN‐β, RANTES, IP‐10, OAS1, PKR, TLR3, RIG‐I, and MDA5 mRNA expression increase upon subsequent induction with HRV16. The vascular endothelium may be infected by human rhinovirus and generate antiviral and inflammatory innate response. Results of the study indicate the possible involvement of the vascular endothelium in the immunopathology of rhinoviral airway infections. [ABSTRACT FROM AUTHOR]