Anti-influenza immune plasma for the treatment of patients with severe influenza A: a randomised, double-blind, phase 3 trial

Autor: John H Beigel, Evgenia Aga, Marie-Carmelle Elie-Turenne, Josalyn Cho, Pablo Tebas, Carol L Clark, Jordan P Metcalf, Caroline Ozment, Kanakatte Raviprakash, Joy Beeler, H Preston Holley, Stephanie Warner, Carla Chorley, H Clifford Lane, Michael D Hughes, Richard T Davey, H. Preston Holley, H. Clifford Lane, Michelle Barron, Aveh Bastani, Philippe Bauer, William Borkowsky, Charles Cairns, Jaime Deville, Marie-Carmelle Elie, Carl Fichtenbaum, Robert Finberg, Mamta Jain, David Kaufman, Michael Lin, John Lin, Ryan Maves, Lee Morrow, Minh-Hong Nguyen, Pauline Park, Christopher Polk, Adrienne Randolph, Suchitra Rao, Lewis Rubinson, Christina Schofield, Shmuel Shoham, Erika Stalets, Renee D Stapleton
Rok vydání: 2019
Předmět:
Zdroj: The Lancet Respiratory Medicine. 7:941-950
ISSN: 2213-2600
DOI: 10.1016/s2213-2600(19)30199-7
Popis: Summary Background Infection with influenza virus causes substantial morbidity and mortality globally, although antiviral treatments are available. Previous studies have suggested that anti-influenza immune plasma could be beneficial as treatment, but they were not designed as randomised, blinded, placebo-controlled trials. Therefore, we aimed to prospectively evaluate the clinical efficacy of high-titre immune plasma compared with standard low-titre plasma to improve outcomes in patients with severe influenza A infection. Methods We did this randomised, double-blind, phase 3 trial at 41 US medical centres to assess the efficacy of high-titre anti-influenza plasma (haemagglutination inhibition antibody titre ≥1:80) compared with low-titre plasma (≤1:10). Children and adults with PCR-confirmed influenza A infection, a National Early Warning score of 3 or greater, and onset of illness within 6 days before randomisation were eligible. Patients were randomly assigned (2:1) using an interactive web response system to receive either two units (or paediatric equivalent) of high-titre plasma (high-titre group) or low-titre plasma (low-titre group), and were followed up for 28 days from randomisation. High-titre and low-titre plasma had the same appearance. Randomisation was stratified by severity (in intensive care unit, not in intensive care but requiring supplemental oxygen, or not in intensive care and not requiring supplemental oxygen) and age ( 1 indicates improvement in clinical status across all categories for the high-titre vs the low-titre group). The primary analysis was done in the intention-to-treat population, excluding two participants who did not receive plasma. This trial is registered with ClinicalTrials.gov , NCT02572817 . Findings Participants were recruited between Jan 26, 2016, and April 19, 2018. Of 200 participants enrolled (177 adults and 23 children), 140 met the criteria for randomisation and were assigned to the high-titre group (n=92) or to the control low-titre group (n=48). One participant from each group did not receive plasma. At baseline, 60 (43%) of 138 participants were in intensive care and 55 (71%) of 78 participants who were not in intensive care required oxygen. 93% of planned plasma infusions were completed. The study was terminated in July, 2018, when independent efficacy analysis showed low conditional power to detect an effect of high-titre plasma even if full accrual (150 participants) was achieved. The proportional OR for improved clinical status on day 7 was 1·22 (95% CI 0·65–2·29, p=0·54). 47 (34%) of 138 participants experienced 88 serious adverse events: 32 (35%) with 60 events in the high-titre group and 15 (32%) with 28 events in the low-titre group. The most common serious adverse events were acute respiratory distress syndrome (ARDS; four [4%] vs two [4%]), allergic transfusion reactions (two [2%] vs two [4%]), and respiratory distress (three [3%] vs none). 65 (47%) participants experienced 183 adverse events: 42 (46%) with 126 events in the high-titre group and 23 (49%) with 57 events in the low-titre group. The most common adverse events were anaemia (four [3%] vs two [4%]) and ARDS (four [3%] vs three [5%]). Ten patients died during the study (six [7%] in the high-titre group vs four [9%] in the low-titre group, p=0·73). The most common cause of death was worsening of acute respiratory distress syndrome (two [2%] vs two [4%] patients). Interpretation High-titre anti-influenza plasma conferred no significant benefit over non-immune plasma. Although our study did not have the precision to rule out a small, clinically relevant effect, the benefit is insufficient to justify the use of immune plasma for treating patients with severe influenza A. Funding National Institute of Allergy and Infectious Diseases of the National Institutes of Health (Bethesda, MD, USA).
Databáze: OpenAIRE
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