Association of persistent wild-type measles virus RNA with long-term humoral immunity in rhesus macaques.

07:00 EST 14th January 2020 | BioPortfolio

Summary of "Association of persistent wild-type measles virus RNA with long-term humoral immunity in rhesus macaques."

Recovery from measles results in life-long protective immunity. To understand induction of long-term immunity, rhesus macaques were studied for six months after infection with WT measles virus (MeV). Infection caused viremia and rash with clearance of infectious virus by 14 days. MeV RNA persisted in PBMCs for 30-90 days and in lymphoid tissue for 6 months most often in B cells but was rarely detected in BM. Antibody with neutralizing activity and binding specificity for MeV nucleocapsid (N), hemagglutinin (H) and fusion proteins appeared with the rash and avidity matured over 3-4 months. Lymph nodes had increasing numbers of MeV-specific antibody-secreting cells (ASCs) and germinal centers with late hyalinization. ASCs appeared in circulation with the rash and continued to appear along with peripheral Tfh cells for the study duration. ASCs in lymph nodes and PBMCs produced antibody to both H and N, with more H-specific ASCs in BM. From 14-21 days 20-100-fold more total ASCs than MeV-specific ASCs appeared in circulation suggesting mobilization of pre-existing ASCs. Therefore, persistence of MeV RNA in lymphoid tissue was accompanied by continued germinal center formation, ASC production, avidity maturation and accumulation of H-specific ASCs in BM to sustain neutralizing antibody and protective immunity.


Journal Details

This article was published in the following journal.

Name: JCI insight
ISSN: 2379-3708


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