Melot Logan, Bankamp Bettina, Rota Paul A, Coughlin Melissa M
Viral Vaccine Preventable Diseases Branch, Division of Viral Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
Emory University, Atlanta, GA 303333, USA.
iScience. 2023 Aug 25;26(10):107721. doi: 10.1016/j.isci.2023.107721. eCollection 2023 Oct 20.
Acute infection with measles virus (MeV) causes transient immunosuppression often leading to secondary infections. MeV infection of B lymphocytes results in changes in the antibody repertoire and memory B cell populations for which the mechanism is unknown. In this study, we characterize the infection of primary B cells with wild-type and vaccine strains of MeV. Vaccine-infected B cells were characterized by a higher percentage of cells positive for viral protein, a higher level of viral transcription and reduced cell death compared to wild-type infected cells, regardless of B cell subtype. Vaccine-infected cells showed more production of TNF-α and IL-10 but less production of IL-8 compared to wild-type infected cells. IL-4 and IL-6 levels detected were increased during both vaccine and wild-type infection. Despite evidence of replication, measles-infected B cells did not produce detectable viral progeny. This study furthers our understanding of the outcomes of MeV infection of human B cells.
麻疹病毒(MeV)急性感染会导致短暂的免疫抑制,常引发继发感染。MeV感染B淋巴细胞会导致抗体库和记忆B细胞群体发生变化,但其机制尚不清楚。在本研究中,我们对野生型和疫苗株MeV感染原代B细胞的情况进行了表征。与野生型感染细胞相比,无论B细胞亚型如何,疫苗感染的B细胞都具有更高比例的病毒蛋白阳性细胞、更高水平的病毒转录以及更低的细胞死亡率。与野生型感染细胞相比,疫苗感染的细胞显示出更多的TNF-α和IL-10产生,但IL-8产生较少。在疫苗和野生型感染期间检测到的IL-4和IL-6水平均升高。尽管有复制证据,但麻疹感染的B细胞未产生可检测到的病毒后代。本研究进一步加深了我们对人类B细胞MeV感染结果的理解。