Study of type 1 vascular adhesion molecules in patients with acute myocardial infarction with ST segment elevation at different body weights

Objective: to study the level of adhesion molecules in patients with STEMI with different BMI at the hospital stage and 12 months after the index event.Materials and methods: the study included 126 people with STEMI who had undergone PCI and 27 people in the control group. The analysis of the level of svcam‑1 in peripheral blood at the beginning of the disease and after 12 months was carried out, BMI and waist volume were measured. An assessment of the nature and frequency of complications after STEMI was performed.Results: the levels of biomarkers of the vascular endothelial adhesion molecule type 1 increase during the acute period of stemi, statistically signifi tly decrease, but remain increased by 3.5 times 12 months after the index event compared with the initial values. There was no association of VCAM‑1 with visceral obesity in the groups of our patients. Vascular endothelial adhesion molecules of type 1 increase in patients with a fatal outcome, as well as with an increase in the severity of OSN and CHF. Thus, VCAM 1 can be a predictor of an unfavorable outcome of AMI.Conclusions: the article presents the study of a marker of systemic inflammation VCAM‑11 in patients with STEMI with various types of obesity or BMI at the stage of hospitalization and outpatient follow‑up during the year. The determination of the VCAM‑1 level can be used to assess the intensity of the inflammatory process and the risk of adverse outcomes.

Effect of Eribulin on Angiogenesis and Endothelial Adhesion Molecule Expression.

Tumor vasculature is an important component of the tumor microenvironment and deeply affects anticancer immune response. Eribulin is a non-taxane inhibitor of the mitotic spindle. However, off-target effects interfering with the tumor vasculature have been reported. The mechanisms responsible of this effect are still unclear.We designed an in vitro study to investigate the effect of eribulin, with or without TGF-β, on neo-angiogenesis, and on the expression of the adhesion molecules ICAM-1 and VCAM-1. We also investigated the effects of paclitaxel and vinorelbine in the same experimental conditions.Eribulin up-regulated the epithelial markers VE-cadherin and CD-31 in HUVEC and inhibited tube formation in HUVEC cultured in Matrigel. The drug effectively arrested tube formation even in presence of TGF-β and counteracted the TGF-β-induced change in cell shape from the endothelial cobblestone-like morphology to an elongated spindleshaped morphology.We also observed that eribulin was able to upregulate ICAM-1 and to counteract its downregulation induced by TGF-β.Eribulin therefore exerts different off-label effects: increases vascular remodeling, counteracts the endothelial tomesenchymal transition (EndMT) mediated by TGF-β and promotes tumor infiltration by immune cells by increasing expression of ICAM-1 and transcription of CD31 and VE-cadherin.Moreover, eribulin was able to inhibit vasculature remodeling and the induction of EndMT mediated by TGF-β better than vinorelbine and paclitaxel.The effects observed in this study might have important therapeutic consequence if the drug will be administered with immunotherapy.

Study of markers of systemic inflammation (matrix metalloproteinase-9, vascular endothelial adhesion molecules of type 1) in patients with ST -segment elevation myocardial infarction at the hospital and outpatient stages

Aim. To study the level of MMP-9 and VCAM-1 in patients with AMI with ST-segment elevation at the hospital stage and one year after the index event, depending on the development of complications and changes in BMI and waist size (WS). Material and methods. The study included 126 people with STEMI after PCI, as well as 27 people in the control group. The level of MMP-9 and VCAM-1 in peripheral blood was analyzed. In addition to the standard methods of examination and diagnosis, BMI and WS were measured to identify groups with visceral obesity. The assessment of the frequency and nature of complications after STEMI was performed. Results. The levels of biomarkers of vascular endothelial adhesion molecule type 1 and matrix metalloproteinase type 9 are increased in the acute period of STEMI, statistically significantly reduced, but remain elevated 12 months after the index event, with VCAM-1 by 3.5 times, and MMP by almost 2 times compared to the initial values. The level of MMP-9 is significantly higher in excess body mass index and waist size, and VCAM-1 has no association with visceral obesity. Vascular endothelial adhesion molecules of type 1 and matrix metalloproteinases of type 9 are increased in patients with a fatal outcome, as well as with an increase in the severity of OSN and CHF. The level of matrix metalloproteinase has a strong relationship with fatal outcome and repeated MI, and the vascular endothelial adhesion molecule type 1 has a stronger relationship with the severity of CHF. Conclusion. The article studied markers of systemic inflammation (matrix metalloproteinase type 9 and vascular endothelial adhesion molecules type 1) in patients with ST-segment elevation myocardial infarction, depending on the presence of obesity at the hospital and outpatient stages. Simultaneous determination of MMP-9 and VCAM-1 levels can be used to assess the intensity of the inflammatory process and the risk of adverse outcomes.

ADAM10-Mediated Cleavage of ICAM-1 Is Involved in Neutrophil Transendothelial Migration

To efficiently cross the endothelial barrier during inflammation, neutrophils first firmly adhere to the endothelial surface using the endothelial adhesion molecule ICAM-1. Upon actual transmigration, the release from ICAM-1 is required. While Integrin LFA1/Mac1 de-activation is one described mechanism that leads to this, direct cleavage of ICAM-1 from the endothelium represents a second option. We found that a disintegrin and metalloprotease 10 (ADAM10) cleaves the extracellular domain of ICAM-1 from the endothelial surface. Silencing or inhibiting endothelial ADAM10 impaired the efficiency of neutrophils to cross the endothelium, suggesting that neutrophils use endothelial ADAM10 to dissociate from ICAM-1. Indeed, when measuring transmigration kinetics, neutrophils took almost twice as much time to finish the diapedesis step when ADAM10 was silenced. Importantly, we found increased levels of ICAM-1 on the transmigrating neutrophils when crossing an endothelial monolayer where such increased levels were not detected when neutrophils crossed bare filters. Using ICAM-1-GFP-expressing endothelial cells, we show that ICAM-1 presence on the neutrophils can also occur by membrane transfer from the endothelium to the neutrophil. Based on these findings, we conclude that endothelial ADAM10 contributes in part to neutrophil transendothelial migration by cleaving ICAM-1, thereby supporting the release of neutrophils from the endothelium during the final diapedesis step.

Ketamine attenuates high-glucose-mediated endothelial inflammation in human umbilical vein endothelial cells

Hyperglycemia mediates oxidative stress, thus inducing transcription factor nuclear factor kappa B (NF-κB) activation, increasing endothelial adhesion molecule expression and monocyte/endothelial interaction, and resulting in endothelial injury. Ketamine was reported to attenuate oxidative stress in many cases. In this research, we determined whether and how ketamine protects against high-glucose-mediated augmentation of monocyte/endothelial interaction and endothelial adhesion molecule expression in human umbilical vein endothelial cells. High glucose augmented monocyte/endothelial adhesion and endothelial adhesion molecule expression. High glucose induced reactive oxygen species (ROS) production and augmented phospho-protein kinase C (p-PKC) βII expression and PKC activity. Moreover, high glucose inhibited the inhibitory subunit of nuclear factor-κBα (IκBα) expression in the cytoplasm and induced NF-κB nuclear translocation. Importantly, the effects induced by high glucose were counteracted by ketamine treatment. Further, CGP53353, a PKC βII inhibitor, inhibited high-glucose-mediated NF-κB nuclear translocation, attenuated adhesion molecule expression, and reduced monocyte/endothelial interaction. Further, these effects of ketamine against high-glucose-induced endothelial injury were inhibited by phorbol 12-myristate 13-acetate, a PKC βII activator. In conclusion, ketamine, via reducing ROS accumulation, inhibited PKC βII Ser660 phosphorylation and PKC and NF-κB activation and reduced high-glucose-induced expression of endothelial adhesion molecules and monocyte/endothelial interaction.

Endothelial damage and circadian blood pressure profile in rheumatoid arthritis

Aim. To study the influence of the state of endothelium on the daily profile of arterial pressure (AP) in patients with rheumatoid arthritis (RA). Materials and methods. In 70 RA pts carried out C-reactive protein (CRP), vascular endothelial adhesion molecule type 1 (sVCAM-1), antigen von Willebrand Factor (AG WF), interleukin-8 (Il-8), rheumatoid factor (RF), IgG, endotheline-1 (ET-1), number of desquamated endotheliocytes cells (DE), VS, activity of renin by immunoenzyme analysis. The dysfunction of endothelium was evaluated by calculation of DE. The functional methods included the daily monitoring of arterial pressure (AP). Results. Arterial hypertension (AH) occurred in 40 (57.1%) pts. RA pts are revealed the signs of endothelial dysfunction, about which significant differences among the indices of activation of endothelium in comparison with control group testify. ET-1, sVCAM-1, vWF AG, Il-8, CRP content was higher in RA pts. Reliably above there was a number of DE. Reliable differences according to these indices depending of RA activity were discovered. With conducting of correlation analysis it is revealed, that markers of the activation of endothelium: sVCAM-1, vWF AG positively correlated with increasing RF IgG and indices of the immune inflammation: CRP, and DE number. In patients suffering from RA, showed signs of endothelial dysfunction. The positive correlation between endothelial damage and daily profile of AP show the relationship of these processes. Conclusion. Positive correlations between the damage of endothelium and disturbance of AP daily profile testify about the interrelation of these processes.

The proton-sensing GPR4 receptor regulates paracellular gap formation and permeability of vascular endothelial cells

Tissue acidosis can be a consequence of numerous disease states including stroke, myocardial infarction, limb ischemia, and inflammation. Blood vessels existing in the affected tissues are associated with the progression of acidosis-related diseases. However, the mechanisms by which endothelial cells (ECs) lining the affected blood vessels sense and respond to an acidic microenvironment remain largely unclear. We investigated the functional effects of the proton-sensing G protein-coupled receptor GPR4 in acidosis-induced endothelial inflammation. GPR4 is highly expressed in ECs and known to regulate EC inflammation and endoplasmic reticulum stress responses within acidic microenvironments. Using genetic and pharmacological approaches, we demonstrate that GPR4 activation by acidosis increases EC paracellular gap formation and permeability. We further demonstrate that GPR4-mediated paracellular gap formation is dependent on the Gα12/13 signaling pathway. To assess the functional role of GPR4 in the inflammatory response in vivo, we utilized an acute hindlimb ischemia-reperfusion mouse model. We demonstrate that both genetic deletion and pharmacological inhibition of GPR4 reduce tissue edema, exudate formation, endothelial adhesion molecule expression, and leukocyte infiltration in the inflamed tissue. Collectively, these data suggest GPR4/Gα12/13 signaling mediates acidosis-induced endothelial paracellular gap formation and permeability. This study implicates GPR4 as a candidate therapeutic target for the remediation of inflammation and tissue edema.