RE: Anti-IFN autoantibodies immunoassay1 Feb 2024 18:20
Synairgen are certainly fortunate if Casanovalabs is designing / adapting the assay for the P2s. World leaders in their field and undoubtedly the best partnership you could imagine. Let's not think it's the whole gig though. Traditional methods of data analysis are still the main part of the package, and we know what direction that data points in. Auto-abs testing will help to identify a maximum of between 10% - 15% of ICU patients who have them on arrival, or develop them in hospital, but as this study shows those patients may not have more severe outcomes than other severely ill patients.
Bastard et al December 2022 " A total of 925 critically ill COVID-19 patients were included in the cohort between March 2020 and May 2021 and had serum samples analysed for neutralization ability of anti-IFN auto-Abs. The median age of the patients included in the whole cohort was 62 years, 70% of whom were male. Hypertension (51.2%) and obesity (43.0%) were the most frequent comorbidities, as expected in critically ill COVID-19 patients
We found auto-Abs neutralizing type I IFNs in 96 patients of the cohort (10.3%, 95% CI [8.4–12.3])
In conclusion, auto-Abs against type I IFNs were found in at least 10% of critically ill COVID-19 patients, but in contrast with previous studies including both ICU and non-ICU patients, were not associated with increased mortality in this cohort of ICU patients. Further studies should aim at exploring an impaired type I IFN production or response in critically ill COVID-19 patients without positive auto-Abs, as they exhibit the same clinical features and outcomes than those who carry neutralizing auto-Abs. Routine screening of auto-Abs against type I IFN might be of interest before ICU admission to predict the risk of clinical worsening, as previously demonstrated, but seems to be of limited interest in the ICU setting to improve outcome prediction. Whether targeted treatment strategies should be initiated in patients with positive auto-Abs should be determined by future studies.
https://annalsofintensivecare.springeropen.com/articles/10.1186/s13613-022-01095-5