PMID- 28331286 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 1177-5475 (Print) IS - 1177-5491 (Electronic) IS - 1177-5475 (Linking) VI - 11 DP - 2017 TI - Neutralizing activities against seasonal influenza viruses in human intravenous immunoglobulin. PG - 23-30 LID - 10.2147/BTT.S123831 [doi] AB - Influenza viruses A/H1N1, A/H3N2, and B are known seasonal viruses that undergo annual mutation. Intravenous immunoglobulin (IVIG) contains anti-seasonal influenza virus globulins. Although the virus-neutralizing (VN) titer is an indicator of protective antibodies, changes in this titer over extended time periods have yet to be examined. In this study, variations in hemagglutination inhibition (HI) and VN titers against seasonal influenza viruses in IVIG lots over extended time periods were examined. In addition, the importance of monitoring the reactivity of IVIG against seasonal influenza viruses with varying antigenicity was evaluated. A/H1N1, A/H3N2, and B influenza virus strains and IVIG lots manufactured from 1999 to 2014 were examined. The HI titer was measured by standard methods. The VN titer was measured using a micro-focus method. IVIG exhibited significant HI and VN titers against all investigated strains. Our results suggest that the donor population maintains both specific and cross-reactive antibodies against seasonal influenza viruses, except in cases of pandemic viruses, despite major antigen changes. The titers against seasonal influenza vaccine strains, including past strains, were stable over short time periods but increased slowly over time. FAU - Onodera, Hiroyuki AU - Onodera H AD - Medical Information Department. FAU - Urayama, Takeru AU - Urayama T AD - Research and Development Division, Japan Blood Products Organization, Tokyo. FAU - Hirota, Kazue AU - Hirota K AD - Research and Development Division, The Research Foundation for Microbial Diseases of Osaka University, Kagawa. FAU - Maeda, Kazuhiro AU - Maeda K AD - Research and Development Division, The Research Foundation for Microbial Diseases of Osaka University, Kagawa. FAU - Kubota-Koketsu, Ritsuko AU - Kubota-Koketsu R AD - Research and Development Division, The Research Foundation for Microbial Diseases of Osaka University, Kagawa; Former Department of Virology, Research Institute for Microbial Diseases, Osaka University. FAU - Takahashi, Kazuo AU - Takahashi K AD - Virology Division, Department of Infectious Diseases, Osaka Prefectural Institute of Public Health, Osaka. FAU - Hagiwara, Katsuro AU - Hagiwara K AD - Pathogenic Risk Evaluation, Graduate School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan. FAU - Okuno, Yoshinobu AU - Okuno Y AD - Research and Development Division, The Research Foundation for Microbial Diseases of Osaka University, Kagawa. FAU - Ikuta, Kazuyoshi AU - Ikuta K AD - Research and Development Division, The Research Foundation for Microbial Diseases of Osaka University, Kagawa; Former Department of Virology, Research Institute for Microbial Diseases, Osaka University. FAU - Yunoki, Mikihiro AU - Yunoki M AD - Research and Development Division, Japan Blood Products Organization, Tokyo; Former Department of Virology, Research Institute for Microbial Diseases, Osaka University; Pathogenic Risk Evaluation, Graduate School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan. LA - eng PT - Journal Article DEP - 20170310 PL - New Zealand TA - Biologics JT - Biologics : targets & therapy JID - 101321511 PMC - PMC5354529 OTO - NOTNLM OT - IVIG OT - influenza OT - neutralization OT - seasonal OT - vaccine COIS- Disclosure H. Onodera, T. Urayama, and M. Yunoki are employees of the Japan Blood Products Organization. T. Urayama and M. Yunoki are also former employees of the Benesis Corporation. H. Onodera is a former employee of the Japanese Red Cross Society. K. Maeda, R. Kubota-Koketsu, K. Hirota, Y. Okuno, and K. Ikuta are employees of The Research Foundation for Microbial Diseases of Osaka University. K. Ikuta was also a Professor at Osaka University. K. Takahashi is currently affiliated to the Department of Clinical Laboratory, International University of Health and Welfare Hospital. The authors report no other conflicts of interest. EDAT- 2017/03/24 06:00 MHDA- 2017/03/24 06:01 PMCR- 2017/03/10 CRDT- 2017/03/24 06:00 PHST- 2017/03/24 06:00 [entrez] PHST- 2017/03/24 06:00 [pubmed] PHST- 2017/03/24 06:01 [medline] PHST- 2017/03/10 00:00 [pmc-release] AID - btt-11-023 [pii] AID - 10.2147/BTT.S123831 [doi] PST - epublish SO - Biologics. 2017 Mar 10;11:23-30. doi: 10.2147/BTT.S123831. eCollection 2017.