The impact of in utero HIV exposure on gut microbiota, inflammation, and microbial translocation

Area of Science:

• Microbiology
• Immunology
• Pediatrics

Background:

• HIV-exposed but uninfected (HEU) children face increased infectious diseases, immune alterations, growth issues, and mortality.
• The gut microbiota plays a crucial role in host homeostasis and immune system development.
• Previous research has not fully elucidated the gut microbiome's role in HEU children's health.

Purpose of the Study:

• To investigate the gut microbiota composition and function in HEU children.
• To determine if alterations in the gut microbiome are linked to the increased morbidity observed in HEU children.
• To compare the gut microbiome of HEU children with HIV-unexposed children and explore differences related to maternal HIV status.

Main Methods:

• Analysis of gut microbiota composition using 16S rRNA sequencing.
• Assessment of alpha and beta diversity of the gut microbiota.
• Functional prediction of the gut microbiome based on 16S rRNA data.
• Comparison of microbial translocation and inflammation markers.

Main Results:

• No significant differences in alpha or beta diversity of gut microbiota between HEU and unexposed children.
• Significant differences in the abundance of specific bacterial taxa in the gut microbiota of HEU children compared to unexposed children.
• Functional predictions revealed distinct metagenomic functions between HEU and unexposed children.
• No differences in weight, growth z-scores, albumin levels, or inflammation markers between the groups.

Conclusions:

• HIV-infected mothers and their HEU children exhibit alterations in gut microbiome composition and predicted function.
• These microbiome differences may contribute to the health challenges faced by HEU children.
• Further research on HEU children's gut microbiome is essential for developing targeted treatments.