id author title date pages extension mime words sentences flesch summary cache txt cord-317878-bqpj0ey0 Czick, Maureen COVID’s Razor: RAS Imbalance, the Common Denominator Across Disparate, Unexpected Aspects of COVID-19 2020-09-11 .txt text/plain 12676 811 45 Silent hypoxia, atypical acute respiratory distress syndrome (ARDS), stroke, olfactory loss, myocarditis, and increased mortality rates in the elderly, in men, in African-Americans, and in patients with obesity, diabetes, and cancer—all bear the fingerprints of the renin-angiotensin system (RAS) imbalance, suggesting that RAS is the common culprit. Subpopulations manifesting higher rates of COVID-19 mortality-including hypertensives, the elderly, the obese, diabetics, men, and African-Americans-correlate with preexisting RAS imbalance, with ACE overactivity and/or ACE2 underactivity priming these patients for more severe COVID-19 outcomes. 159 Males generally have higher levels of RAS than premenopausal females, 160 perhaps explaining why male hypertensive rats show a greater blood pressure decrease with ACEIs. 161 Estrogen downregulates the expression of the AT1 gene 162, 163 and suppresses both ROS production in vascular smooth muscle and the enzymatic activity of ACE. ./cache/cord-317878-bqpj0ey0.txt ./txt/cord-317878-bqpj0ey0.txt