Congenital Human Cytomegalovirus Infection Is Associated With Decreased Transplacental IgG Transfer Efficiency Due to Maternal Hypergammaglobulinemia.

Journal Article (Journal Article)

BACKGROUND: Placentally transferred maternal immunoglobulin G (IgG) protects against pathogens in early life, yet vertically transmitted infections can interfere with transplacental IgG transfer. Although human cytomegalovirus (HCMV) is the most common placentally-transmitted viral infection worldwide, the impact of congenital HCMV (cCMV) infection on transplacental IgG transfer has been underexplored. METHODS: We evaluated total and antigen-specific maternal and cord blood IgG levels and transplacental IgG transfer efficiency in a US-based cohort of 93 mother-infant pairs including 27 cCMV-infected and 66 cCMV-uninfected pairs, of which 29 infants were born to HCMV-seropositive nontransmitting mothers and 37 to HCMV-seronegative mothers. Controls were matched on sex, race/ethnicity, maternal age, and delivery year. RESULTS: Transplacental IgG transfer efficiency was decreased by 23% (95% confidence interval [CI] 10-36%, Pā€…=ā€….0079) in cCMV-infected pairs and 75% of this effect (95% CI 28-174%, Pā€…=ā€….0085) was mediated by elevated maternal IgG levels (ie, hypergammaglobulinemia) in HCMV-transmitting women. Despite reduced transfer efficiency, IgG levels were similar in cord blood from infants with and without cCMV infection. CONCLUSIONS: Our results indicate that cCMV infection moderately reduces transplacental IgG transfer efficiency due to maternal hypergammaglobulinemia; however, infants with and without cCMV infection had similar antigen-specific IgG levels, suggesting comparable protection from maternal IgG acquired via transplacental transfer.

Full Text

Duke Authors

Cited Authors

  • Semmes, EC; Li, SH; Hurst, JH; Yang, Z; Niedzwiecki, D; Fouda, GG; Kurtzberg, J; Walsh, KM; Permar, SR

Published Date

  • April 9, 2022

Published In

Volume / Issue

  • 74 / 7

Start / End Page

  • 1131 - 1140

PubMed ID

  • 34260701

Pubmed Central ID

  • PMC8994583

Electronic International Standard Serial Number (EISSN)

  • 1537-6591

Digital Object Identifier (DOI)

  • 10.1093/cid/ciab627

Language

  • eng

Conference Location

  • United States