ArticleAmerican journal of translational research2024
Efficacy of the combination of BRII-196/BRII-198 in the treatment of COVID-19 vaccine breakthrough infections.
Article in American journal of translational research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundBRII-196 and BRII-198 are two recombinant human immunoglobulin (Ig) G1 monoclonal antibodies (mAbs) that non-competitively target distinct epitope regions within the receptor-binding domain (RBD) of the coronavirus spike glycoproteins. These antibodies are derived directly from human B cells of individuals who recovered from COVID-19.
objectiveTo analyze the efficacy of BRII-196/BRII-198 in the treatment of coronavirus disease 2019 (COVID-19) vaccine breakthrough infections.
methodsCOVID-19 patients at high risk of progressing to severe and critical illness, with an initial SARS-CoV-2 immunoglobulin (Ig) G antibody level < 1.0 S/CO (detected within 24-48 hours post COVID-19 diagnosis), were treated with BRII-196/BRII-198 within three days of symptom onset. Treatment continued until the antibody level exceeded 1.0 S/CO. Patients whose absolute lymphocyte count (ALC) at first detection (within 24-48 h post-diagnosis) was < 0.8 × 10
resultsA total of 61 cases of breakthrough infections were observed, classified as 10 mild cases, 31 ordinary cases, and 20 severe cases. Among these, 20%, 48.4% and 75% of the patients with mild, ordinary, and severe COVID-19, respectively, had initial SARS-CoV-2 IgG antibody level < 1.0 S/CO. Additionally, 0%, 35% and 70% had initial ALC < 0.8 × 10
conclusionsThe initial levels of SARS-CoV-2 IgG antibody and lymphocytes in fully vaccinated patients with breakthrough infections are inversely correlated with the severity of the disease. Early treatment with BRII-196/BRII-198 can shorten NA negative conversion time in severe COVID-19 patients and increase in vivo neutralizing antibody levels post-conversion, providing lasting protection. However, BRII-196/BRII-198 does not influence lymphocyte count recovery in patients with either ordinary and/or severe COVID-19.
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