Identification and functional analysis of key miRNAs and target genes associated with failure of HBV mother-to-child transmission prevention

by Quan He, Xiong Zou, Chunyan Zheng, Jiawei Zhang, Jialing Li, Liping Hu, Ting Zeng, Zijuan Huang, Peipei Zeng, Jinli Wei, Haichen Cui, Yongjian Su, Hai Li Background Residual mother-to-child transmission (MTCT) of hepatitis B virus (HBV) remains a significant clinical challenge despite standard immunoprophylaxis. Identifying molecular markers is crucial for improved prevention and diagnosis.

Methods We conducted a case-control study using the Guangxi Liuzhou HBV MTCT registry. Peripheral blood RNA sequencing (Illumina HiSeq) was performed on infants from HBsAg-positive mothers: cases (HBsAg-positive, n = 6) and controls (HBsAg-negative, n = 10).

All infants receive HBIG and the first dose of hepatitis B vaccine within 24 hours after birth, followed by completion of the three-dose vaccination series. Differentially expressed miRNAs (DEMs; adj-p 1) were identified.

Target genes were predicted (miRanda/RNAhybrid) and functionally analyzed (GO/KEGG enrichment, PPI network). HBV-associated target genes were identified by cross-referencing GeneCards/NCBI.

Results RNA-seq identified 62 DEMs (19 upregulated, 43 downregulated). Target prediction yielded 5,014 genes.

Functional enrichment highlighted key pathways and processes. PPI analysis pinpointed highly connected genes.