PMID- 19694639 OWN - NLM STAT- MEDLINE DCOM- 20090914 LR - 20240320 IS - 1600-0897 (Electronic) IS - 1046-7408 (Print) IS - 1046-7408 (Linking) VI - 62 IP - 3 DP - 2009 Sep TI - H3N2 influenza A virus replicates in immortalized human first trimester trophoblast cell lines and induces their rapid apoptosis. PG - 139-46 LID - 10.1111/j.1600-0897.2009.00723.x [doi] AB - PROBLEM: Epidemiological data suggested that pandemic influenza increased the risks of spontaneous abortion and premature labor, while seasonal influenza also increased the risk of schizophrenia in adolescence. However, their pathogenesis is so far unknown. METHOD OF STUDY: The first trimester trophoblast cell lines, namely, Swan71 and HTR8 cells were challenged with A/Udorn/72 influenza virus (H3N2). At indicated time points, cells were examined for expression of influenza proteins. Viral replication in culture media, apoptosis and the expression of human leukocyte antigen (HLA)-G were also examined. RESULTS: Intracellular localization of viral proteins was observed. Twenty-four hours after inoculation, virus was detected in culture media while most cells fell into apoptosis. During apoptosis, expression of HLA-G was unchanged. CONCLUSION: We revealed replication of low pathogenic influenza virus in the first trimester trophoblast cell lines. Placental damages are likely to be induced by direct cytopathic effects of influenza virus and subsequent apoptosis rather than down regulation of HLA-G expression and subsequent rejection by maternal immune system. FAU - Trinh, Quang Duy AU - Trinh QD AD - Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, Itabashi-ku, Tokyo, Japan. FAU - Izumi, Yasuyuki AU - Izumi Y FAU - Komine-Aizawa, Shihoko AU - Komine-Aizawa S FAU - Shibata, Toshikatsu AU - Shibata T FAU - Shimotai, Yoshitaka AU - Shimotai Y FAU - Kuroda, Kazumichi AU - Kuroda K FAU - Mizuguchi, Masashi AU - Mizuguchi M FAU - Ushijima, Hiroshi AU - Ushijima H FAU - Mor, Gil AU - Mor G FAU - Hayakawa, Satoshi AU - Hayakawa S LA - eng GR - P01 HD054713/HD/NICHD NIH HHS/United States GR - P01 HD054713-03/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Denmark TA - Am J Reprod Immunol JT - American journal of reproductive immunology (New York, N.Y. : 1989) JID - 8912860 RN - 0 (Antigens, Viral) RN - 0 (HLA Antigens) RN - 0 (HLA-G Antigens) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (RNA, Viral) SB - IM MH - Animals MH - Antigens, Viral/immunology MH - *Apoptosis MH - Cell Line MH - Dogs MH - Female MH - HLA Antigens/immunology MH - HLA-G Antigens MH - Histocompatibility Antigens Class I/immunology MH - Humans MH - Influenza A Virus, H3N2 Subtype/*physiology MH - Pregnancy MH - Pregnancy Trimester, First MH - RNA, Viral/genetics MH - Trophoblasts/*cytology/immunology/*virology MH - *Virus Replication PMC - PMC3025808 MID - NIHMS263792 EDAT- 2009/08/22 09:00 MHDA- 2009/09/15 06:00 PMCR- 2011/01/24 CRDT- 2009/08/22 09:00 PHST- 2009/08/22 09:00 [entrez] PHST- 2009/08/22 09:00 [pubmed] PHST- 2009/09/15 06:00 [medline] PHST- 2011/01/24 00:00 [pmc-release] AID - AJI723 [pii] AID - 10.1111/j.1600-0897.2009.00723.x [doi] PST - ppublish SO - Am J Reprod Immunol. 2009 Sep;62(3):139-46. doi: 10.1111/j.1600-0897.2009.00723.x.