Understanding Host-Pathogen Interactions in Congenital Chagas Disease Through Transcriptomic Approaches

Area of Science:

• Parasitology
• Immunology
• Genomics

Background:

• Chagas disease, caused by Trypanosoma cruzi, is a significant parasitic zoonosis.
• Increased migration has led to Chagas disease in non-endemic regions, with congenital transmission emerging as a critical concern.
• Congenital Chagas disease involves complex maternal-fetal immune interactions, complicating diagnosis and treatment.

Purpose of the Study:

• To review and synthesize findings from three RNA-seq studies on congenital Chagas disease.
• To identify differentially expressed genes (DEGs) involved in host-pathogen interactions during congenital transmission.
• To elucidate the molecular mechanisms by which Trypanosoma cruzi manipulates the maternal-fetal immune axis.

Main Methods:

• Analysis of three RNA-sequencing (RNA-seq) studies.
• Utilized DAVID tool for gene ontology analysis.
• Focused on differentially expressed genes (DEGs) in the context of congenital Chagas disease.

Main Results:

• Overexpression of genes related to the innate immune response, including pro-inflammatory cytokines.
• Modulation of calcium-dependent pathways crucial for Trypanosoma cruzi invasion.
• Evidence of Trypanosoma cruzi exploiting the maternal-fetal immune axis to create a tolerogenic environment.
• Alterations in placental angiogenesis, cellular regeneration, and metabolic processes indicate host response manipulation.

Conclusions:

• Congenital Chagas disease results from intricate host-pathogen molecular interactions.
• Trypanosoma cruzi actively manipulates host immune responses, placental functions, and metabolic pathways for transmission and persistence.
• Further multi-omics research is needed to fully understand immune evasion and pathogenesis, considering genetic diversity and non-coding RNAs.