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- W2012058275 abstract "Lymphocytes from a patient (Ma.) with a chronic T-lymphocytic leukaemia were infected with 2 different strains of Epstein-Barr Virus (EBV): B95-8 and M81. Two lymphoblastoid B-cell lines were established; whereas the Ma-M81-cell line secreted a low level of immunoglobulins (Ig) into the culture medium, the Ma-B95-cell line produced unusually large amounts (32 μg/106 cells/24 h), mainly IgG. These polyclonal IgG possessed antiviral activities against cytomegalovirus, respiratory syncytial virus, rubella and measles viruses (the patient's serum at the time of lymphocyte immortalization contained IgG antibodies of the same specificities). The Ma-M81-cell line produced complete EBV virions, while in the Ma-B95 cells the replicative cycle of EBV was blocked at the early antigen stage; intracytoplasmic enlarged cisternae were observed in numerous of these latter cells which produced Ig for more than a year. La fraction lymphocytaire d'un malade (Ma.) ayant une leucémie lymphoïde chronique à lymphocytes T, a été infectée par 2 souches différentes de virus Epstein-Barr, le virus B95-8 et le virus M81. On a établi 2 lignées lymphoblastoïdes à partir des très rares lymphocytes B “normaux”; la lignée Ma-B95 sécrète, dans le milieu de culture, de grandes quantités d'immunoglobulines (Ig) (32 μg/106 cellules/24 h), la lignée Ma-M81 n'en produit que très peu. On a pu détecter dans ces Ig polyclonales—appartenant surtout à la classe des IgG—les principales activités antivirales existant dans le sérum du malade au moment de l'immortalisation de ses lymphocytes (anticorps anti-cytomégalovirus, anti-virus respiratoire syncytial, anti-virus de la rubéole et de la rougeole). Dans les cellules Ma-M81, le cycle de réplication du virus est complet puisqu'elles peuvent produire des antigènes de structure et des virions, alors que les cellules Ma-B95 ne synthétisent que des antigènes précoces; ces dernières au contraire, engagées dans la sécrétion d'Ig au cours des passages successifs pendant plus d'un an, contienne de grandes citernes intracytoplasmiques." @default.
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- W2012058275 date "1981-07-01" @default.
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- W2012058275 title "Antiviral specificities of immunoglobulins secreted by human lymphocytes immortalized in vitro with Epstein-Barr virus" @default.
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