I A Leneva1, E I Burtseva2, S B Yatsyshina3, I T Fedyakina2, E S Kirillova2, E P Selkova4, E Osipova5, V V Maleev3. 1. I. Mechnikov Research Institute of Vaccines and Sera of the Russian Academy of Science, 5a Kazenny per., Moscow 105064, Russia. Electronic address: wnyfd385@yandex.ru. 2. D.I. Ivanovsky Institute of Virology, Ministry of Health of the Russian Federation, Moscow, Russia. 3. Central Research Institute for Epidemiology, Rospotrebnadzor of the Russian Federation, Moscow, Russia. 4. Gabrichevsky Moscow Research Institute for Epidemiology and Microbiology Rospotrebnadzor, Moscow, Russia. 5. I. Mechnikov Research Institute of Vaccines and Sera of the Russian Academy of Science, 5a Kazenny per., Moscow 105064, Russia.
Abstract
BACKGROUND: Antiviral drugs are critical adjuncts to influenza vaccination. This study determined the in vitro susceptibilities of influenza A and B viruses isolated in the 2010-2011 season in Russia to the neuraminidase inhibitor oseltamivir and the hemagglutinin fusion inhibitor umifenovir and clinical efficacy of this antiviral drugs in this season. METHODS: The antiviral potency of these drugs against A(H1N1)pdm09 virus in mice was assessed. Importantly, the clinical effectiveness of oseltamivir and umifenovir was evaluated in a retrospective study conducted in 26 regions of Russia. RESULTS: All tested viruses (n=36) were susceptible to oseltamivir and umifenovir in vitro. Oseltamivir (10mg/kg/day) and umifenovir (60 mg/kg/day) significantly increased the survival of mice challenged with A/California/04/2009 (H1N1)pdm09 virus (p<0.05). Influenza infection was laboratory-confirmed in 442 patients among 1462 patients hospitalized with acute respiratory infections. The treatment of influenza-infected patients within 48h of symptom onset with oseltamivir and umifenovir was associated with a significant decrease in the duration of illness (2-3 days) and symptoms (p<0.001). Pneumonia was observed in none of the patients treated with oseltamivir and in 0.3% of the patients treated with umifenovir, compared to 23.7% of patients who did not receive antiviral therapy (p<0.001). CONCLUSIONS: This study provided experimental and clinical evidence of the efficacy of oseltamivir and umifenovir against influenza viruses, representatives of which have continued to circulate in post-pandemic seasons.
BACKGROUND: Antiviral drugs are critical adjuncts to influenza vaccination. This study determined the in vitro susceptibilities of influenza A and B viruses isolated in the 2010-2011 season in Russia to the neuraminidase inhibitor oseltamivir and the hemagglutinin fusion inhibitor umifenovir and clinical efficacy of this antiviral drugs in this season. METHODS: The antiviral potency of these drugs against A(H1N1)pdm09 virus in mice was assessed. Importantly, the clinical effectiveness of oseltamivir and umifenovir was evaluated in a retrospective study conducted in 26 regions of Russia. RESULTS: All tested viruses (n=36) were susceptible to oseltamivir and umifenovir in vitro. Oseltamivir (10mg/kg/day) and umifenovir (60 mg/kg/day) significantly increased the survival of mice challenged with A/California/04/2009 (H1N1)pdm09 virus (p<0.05). Influenza infection was laboratory-confirmed in 442 patients among 1462 patients hospitalized with acute respiratory infections. The treatment of influenza-infectedpatients within 48h of symptom onset with oseltamivir and umifenovir was associated with a significant decrease in the duration of illness (2-3 days) and symptoms (p<0.001). Pneumonia was observed in none of the patients treated with oseltamivir and in 0.3% of the patients treated with umifenovir, compared to 23.7% of patients who did not receive antiviral therapy (p<0.001). CONCLUSIONS: This study provided experimental and clinical evidence of the efficacy of oseltamivir and umifenovir against influenza viruses, representatives of which have continued to circulate in post-pandemic seasons.
Authors: John H Beigel; Hannah H Nam; Peter L Adams; Amy Krafft; William L Ince; Samer S El-Kamary; Amy C Sims Journal: Antiviral Res Date: 2019-04-08 Impact factor: 5.970
Authors: Jennifer L McKimm-Breschkin; Shibo Jiang; David S Hui; John H Beigel; Elena A Govorkova; Nelson Lee Journal: Antiviral Res Date: 2017-11-21 Impact factor: 5.970
Authors: C E Hulseberg; L Fénéant; K M Szymańska-de Wijs; N P Kessler; E A Nelson; C J Shoemaker; C S Schmaljohn; S J Polyak; J M White Journal: J Virol Date: 2019-04-03 Impact factor: 5.103