Genomic Insights into Wolbachia Strain wCin2USA1 Reveal Promising Cytoplasmic Incompatibility Potential and Next-Generation Dengue Biocontrol

Dengue fever poses a growing public health challenge globally, resulting in significant morbidity and economic burden. The use of Wolbachia-mediated biocontrol represents a promising, cost-effective, and environmentally sustainable strategy for managing dengue transmission. However, the susceptibility of existing Wolbachia strains utilized in controlling Aedes aegypti necessitates the investigation of novel strains to enhance dengue control efficacy. This study aimed to identify potential alternative Wolbachia strains for dengue control by comparing the genomes of seven Wolbachia pipientis strains: wMel, wAlbB, wlrr, wHm-C, wAnm, ant7, and a strain isolated from Aedes aegypti. We conducted comprehensive genomic analyses, including phylogenetic assessments, metabolic pathway evaluations, and characterization of the Cytoplasmic Incompatibility Factor (Cif) genes. Our analyses identified the strain wCin2USA1 as a strong candidate for alternative dengue control strategies. This strain demonstrated remarkable genomic similarities to wMel, an already established strain used as biocontrol for Aedes aegypti. Importantly, this strain presented two distinct pairs of Cif genes from different monophyletic types, each homologous to the Cif genes found in wMel and wAlbB. This genetic architecture suggests a high degree of compatibility and demonstrates promising potential for the suppression of Aedes aegypti populations through the induction of Cytoplasmic Incompatibility. The presence of multiple intact prophage regions also suggests greater adaptability compared to established strains. Our findings support the hypothesis that wCin2USA1 could serve as an effective biocontrol agent against dengue transmission. This work provides critical insights into developing innovative Wolbachia-based interventions aimed at mitigating the persistent threat posed by dengue fever. Future research should concentrate on optimizing release methodologies, evaluating ecological impacts, and assessing the strain's effectiveness against the dengue virus.