How The Coronavirus Infects Human Cells | Anti Inflammatory Nutritional Supplements

By Author: David Seaman
Total Articles: 63
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The novel coronavirus that emerged in late 2019 called SARS-CoV-2 enters cells by binding to an enzyme called angiotensin converting enzyme-2 (ACE2). I have noticed that this enzyme is referred to by many as the ACE2 receptor. You should understand that ACE2 is not a receptor, it is an enzyme. The primary function of ACE2 is to convert a pro-inflammatory substance called angiotensin II into anti-inflammatory angiotensin-(1-7).

Angiotensin II increases blood pressure and also promotes inflammation and lung damage, which is counteracted by angiotensin-(1-7), which means we need to produce an adequate amount of angiotensin-(1-7) to balance the effects of angiotensin II. This does occur in healthy people, in which a balance is struck between angiotensin II and angiotensin-(1-7) by the actions of ACE2. Unfortunately, variable degrees of ACE2 deficiency are found in the elderly population, as well as in people with diabetes, hypertension, and heart disease. These are the same people at a greater risk for a poor outcome if infected by SARS-CoV-2 (1).

It should be understood that diabetes, hypertension and heart disease ...
... almost always share a common problem, that being elevated blood glucose levels. The metabolic syndrome is a hyperglycemic state (high blood glucose levels), which leads to the development of diabetes, hypertension, heart disease, and most other chronic diseases.

Too much glucose in circulation leads to a process called glycosylation, wherein proteins become “sugar coated.” You may have heard of hemoglobin A1c, which is also referred to as glycosylated hemoglobin. Practically speaking this means that hemoglobin in red blood cells gets “sugar coated.” Hemoglobin A1c is the most commonly measure glycosylated protein. It turns out that ACE2 can also become glycosylated, which appears to increase the ability of SARS-CoV-2 to infect lung cells (2).

Once a lung cell is infected by SARS-CoV-2, there is a further reduction of ACE2 activity, which further magnifies the imbalance between lung damaging angiotensin II and lung protective angiotensin-(1-7). This helps to explain why people with hyperglycemia (diabetes, hypertension, and heart disease) are at a greater risk for developing a severe case of COVID-19 (1,2). The coronavirus more easily gains access to lung cells due to the glycosylation of ACE2, and once infected there is a greater reduction in ACE2 activity, which enhances the pro-inflammatory imbalance between angtiotensin II and angiotensin-(1-7).

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