Lack of Correlation Between Soluble Angiotensin-Converting Enzyme 2 and Inflammatory Markers in Hospitalized COVID-19 Patients with Hypertension.

Purpose: This study aimed to investigate the correlation of plasma soluble angiotensin-converting enzyme 2, sACE2, and several inflammatory markers in COVID-19 patients requiring hospitalization with hypertension. Additionally, we analyzed the effects of renin-angiotensin-aldosterone-system, RAAS, inhibitors on the levels of sACE2 and inflammatory marker levels in patients with COVID-19. Patients and Methods: This cross-sectional study involved patients with COVID-19 who required hospitalization on a stable dose of antihypertensive drugs. The study included three hospitals in Jakarta and Tangerang, Indonesia, between December 2020 and June 2021. We classified eligible subjects into two groups: patients with COVID-19 treated with antihypertensive RAAS inhibitors or non-RAAS inhibitors. Results: We found no correlation between sACE2 and all the inflammatory and coagulation markers studied (high-sensitivity C-reactive protein, IL-6, IL-10, IL6/IL10, tumor necrosis factor-α, neutrophil-to-lymphocyte ratio, and D-dimer) in COVID-19 patients with hypertension. Further analysis showed lower sACE2 concentrations and IL-6/IL-10 ratio in patients treated with RAAS inhibitors vs those treated with non-RAAS inhibitors. Conclusion: We found no correlation between ACE2 and inflammatory markers. Using RAAS inhibitors resulted in a lower sACE2 and IL-6/IL-10 ratio. The type of antihypertensive treatments has a neutral effect on disease severity and outcome in COVID-19 patients with hypertension. However, to firmly-established these effects, our findings should be confirmed in a much larger population.

The Role of Endothelial Progenitor Cell in Cardiovascular Disease Risk Factors.

Endothelial progenitor cells (EPCs) are cell derived from bone marrow and the cells circulate in peripheral blood. These cells have characteristics similar to stem cells, but their ability to proliferate and differentiate is more limited. EPC discovery has changed the old paradigm in the field of vascular biology and it brings huge implications in medicine as EPCs can mediate the processes of vasculogenesis and maintain the vascular integrity. Increasing amount of EPC in the circulation is important since it has positive correlation with reendothelialization and neovascularization and they are closely linked to cardiovascular health. Thus, EPC could potentially be used for treatment of disease caused by endothelial dysfunction.