This, for me, is the most important part of the last interactive interview (of course apart from learning the shape of the patients in general).
So, what is the meaning of a substantial reduction on IL-6 (Interleukin-6) as far as COVID goes??.
Well, COVID is so new that not much research exists in the subject. However, there is some research on a similar indication, Community acquired pneumonia (CAP). At the end stages of COVID the patients are suffering effects similar to pneumonia which is nothing else that a viral (or bacterial) lung inflammation. This condition is very deadly: hospitalized CAP patients with elevated IL-6 level have a 93.4% higher risk level for lethal outcome. The 101 patients enrolled in this trial, 76 (75.2%) males and 25 (24.8%) females. The average age of the enrolled patients was 63.7 ± 11.8 years. This is very similar to what we are having now with COVID (in regards to negative outcomes).
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4073574/
Quote:IL-6 production is initiated by inflammatory reaction induced by trauma, stress and infection. IL-6 has much longer plasma half-life than other pro-inflammatory cytokines, and that is why IL-6 serves as a very useful marker of pro-inflammatory cytokine activation. Several studies found positive correlation between serum IL-6 concentration at admission and endmost mortality in CAP. IL6 was shown to have independent predictive value in CAP mortality.
Quote:The conclusions: Based on ROC (receiver operating characteristic) curve analysis (AUC ± SE = 0.934 ± 0.035; 95%CI (0.864-1.0); P = 0.000) hospitalized CAP patients with elevated IL-6 level have 93.4% higher risk level for lethal outcome. As a predictor of mortality at the cut-off value of 20.2 pg/ml IL-6 shows sensitivity of 84% and specificity of 87%.
Bottom line: for CAP the levels of IL-6 predict the mortality rate pretty damn well. If this is the case for COVID as well (until today, I don’t think anybody knows this for certain) the reduction of 70% on IL-6 achieved by Leronlimab is a life-saver with no questions about it. It would be nice to learn to what level these values where reduced to (a normal male has a value of 0 – 3.5 pg/ml in plasma).
The above is just my opinion assuming that COVID will respond as CAP ; as the preliminary reactions from the two first patients seem to indicate.