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Prevalence of neutralizing antibodies to common respiratory viruses in intravenous immunoglobulin and in healthy donors in southern China.

ABSTRACT: BACKGROUND:Acute respiratory infections (ARIs) are a leading cause of death among children under the age of 5. However, there are no effective drugs for most of these severe viral infections. Passive immunotherapy with convalescent plasma or hyperimmune intravenous immunoglobulin (H-IVIG) is a potential therapeutic option for serious viral infections. It is important to find a suitable source of convalescent plasma and of H-IVIG containing high titer neutralizing antibodies (NAbs). METHODS:Sera from 96 healthy adult donors in southern China and commercially available IVIG were analyzed for the titers of NAb to several most common respiratory viruses including respiratory syncytial virus (RSV), seasonal influenza A (InfA), enterovirus 71 (EV71), coxsackievirus A16 (CA16), adenovirus type 3 (Ad3) and a recent epidemic adenovirus type 55 (Ad55) by microneutralization test. RESULTS:A high proportion of samples from healthy adult donors were positive for NAbs (>16) to all the viruses except Ad55. A different proportion of these samples had high NAb titers (>512) for InfA (25%), Ad3 (17.71%), RSV (9.38%), EV71 (1.04%), CA16 (3.13%), and Ad55 (4.17%). Commercially available IVIG had high NAb titers to InfA and Ad3 (>1,000) and lower NAb titers to RSV [320], EV71 [160], and CA16 [160]. Strikingly, IVIG also had a high NAb titer to Ad55 (>1,000). CONCLUSIONS:Convalescent plasma could be screened from healthy blood volunteers to establish blood banks and to prepare specific H-IVIG for treating severe ARIs caused by common respiratory viruses.

SUBMITTER: Tian X

PROVIDER: S-EPMC4842828 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature

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Prevalence of neutralizing antibodies to common respiratory viruses in intravenous immunoglobulin and in healthy donors in southern China.

Tian Xingui X Jiang Zaixue Z Ma Qiang Q Liu Qian Q Lu Xiaomei X Liu Wenkuan W Liao Xiaohong X Zhou Rong R Su Xiaobo X Luo Qingming Q

Journal of thoracic disease 20160501 5

<h4>Background</h4>Acute respiratory infections (ARIs) are a leading cause of death among children under the age of 5. However, there are no effective drugs for most of these severe viral infections. Passive immunotherapy with convalescent plasma or hyperimmune intravenous immunoglobulin (H-IVIG) is a potential therapeutic option for serious viral infections. It is important to find a suitable source of convalescent plasma and of H-IVIG containing high titer neutralizing antibodies (NAbs).<h4>Me ...[more]

PMID: 27162653

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Project description:Dysregulated neutrophil and platelet interactions mediate immunothrombosis and cause lung injury in coronavirus disease 2019. IV immunoglobulin modulates neutrophil activation through Fc?RIII binding. We hypothesized that early therapy with IV immunoglobulin would abrogate immunothrombosis and improve oxygenation and reduce progression to mechanical ventilation in coronavirus disease 2019 pneumonia. Design:Prospective randomized open label. Setting:Inpatient hospital. Patients and Intervention:Hypoxic subjects with coronavirus disease 2019 pneumonia were randomized 1:1 to receive standard of care plus IV immunoglobulin 0.5?g/kg/d with methylprednisolone 40?mg 30 minutes before infusion for 3 days versus standard of care alone. Main Results:Sixteen subjects received IV immunoglobulin and 17 standard of care. Median ages were 51 and 58 years for standard of care and IV immunoglobulin, respectively. Acute Physiology and Chronic Health Evaluation II and Charlson comorbidity scores were similar for IV immunoglobulin and standard of care. Seven standard of care versus two IV immunoglobulin subjects required mechanical ventilation (p = 0.12, Fisher exact test). Among subjects with A-a gradient of greater than 200?mm Hg at enrollment, the IV immunoglobulin group showed: 1) a lower rate of progression to requiring mechanical ventilation (2/14 vs 7/12, p = 0.038 Fisher exact test), 2) shorter median hospital length of stay (11 vs 19 d, p = 0.01 Mann Whitney U test), 3) shorter median ICU stay (2.5 vs 12.5 d, p = 0.006 Mann Whitey U test), and 4) greater improvement in Pao2/Fio2 at 7 days (median [range] change from time of enrollment +131 [+35 to +330] vs +44·5 [-115 to +157], p = 0.01, Mann Whitney U test) than standard of care. Pao2/Fio2 improvement at day 7 was significantly less for the standard of care patients who received glucocorticoid therapy than those in the IV immunoglobulin arm (p = 0.0057, Mann Whiney U test). Conclusions:This pilot study showed that IV immunoglobulin significantly improved hypoxia and reduced hospital length of stay and progression to mechanical ventilation in coronavirus disease 2019 patients with A-a gradient greater than 200?mm Hg. A phase 3 multicenter randomized double-blinded clinical trial is under way to validate these findings.

Dataset Information

Prevalence of neutralizing antibodies to common respiratory viruses in intravenous immunoglobulin and in healthy donors in southern China.

Publications

Prevalence of neutralizing antibodies to common respiratory viruses in intravenous immunoglobulin and in healthy donors in southern China.

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