RE: And another30 Nov 2021 01:24
Only 1.3 of critical patients showed auto-abs to INFb
'Auto-Abs neutralizing IFN-ß in 1.3% of critical patients
We previously reported that auto-Abs neutralizing IFN-ß were detected in only two of 101 critical patients with auto-Abs neutralizing IFN-a2 and/or IFN-? (10 ng/ml) (9). Given the potential therapeutic use of IFN-ß (36, 37) and the absence of IFN-ß neutralization data for patients with COVID-19, we tested a larger number of patients and controls, including patients without auto-Abs against IFN-a or IFN-?, for auto-Abs against IFN-ß, assessing the levels and neutralizing activity of auto-Abs against IFN-ß (10 ng/ml). We screened 1773 patients with critical COVID-19 pneumonia and found that 1.3% (N = 23) had neutralizing auto-Abs against IFN-ß; by contrast, such antibodies were present in none of the 187 severe patients tested and in only two of the 1044 controls tested (0.18%) (Fig. 2D, fig. S2B, and table S3). Only 6 of the 23 (21.7%) critical patients also had auto-Abs neutralizing IFN-a2 and/or IFN-? at 100 pg/ml, and none of the controls had such antibodies. '