In Vivo MicroRNA-Based Inhibition of Experimental Cestode Infection.

Area of Science:

• Parasitology
• Molecular Biology
• Genomics

Background:

• Cestodes, like Echinococcus and Taenia, are zoonotic parasites causing significant disease burden.
• Gene expression regulation is crucial for cestode development and infection.
• MicroRNAs (miRNAs) are key gene regulators, with miR-71-5p highly expressed in cestodes and absent in vertebrates.

Purpose of the Study:

• To investigate the functional role of miR-71-5p in cestode infection.
• To assess the therapeutic potential of targeting miR-71-5p in vivo.

Main Methods:

• Utilized chemically modified antisense oligonucleotides for miR-71-5p knockdown in Mesocestoides vogae infection model.
• Administered treatment to infected mice and assessed parasitic burden.
• Conducted toxicity analyses in uninfected mice.
• Performed whole-mount in situ hybridization to determine miR-71-5p expression patterns.

Main Results:

• A 67% reduction in parasitic mass was observed in treated mice compared to controls.
• No adverse effects were detected in toxicity analyses.
• miR-71-5p showed broad expression across parasite tissues, including germinative cells.

Conclusions:

• miR-71-5p is essential for cestode infection establishment and progression.
• Targeting cestode-specific miRNAs like miR-71-5p is a viable therapeutic strategy for neglected tropical diseases.
• This study represents the first in vivo miRNA knockdown in a cestode infection model.