Viral-Encoded microRNAs in Host-Pathogen Interactions in Silkworm.

Area of Science:

• * Entomology
• * Molecular Biology
• * Virology

Background:

• * The mulberry silkworm (Bombyx mori) is an important economic insect and a model for host-pathogen interactions.
• * Silkworm cultivation faces significant threats from viral, fungal, bacterial, and protozoan pathogens.
• * MicroRNAs (miRNAs) are crucial regulators in eukaryotes and play roles in silkworm development, immunity, and host-pathogen interactions.

Purpose of the Study:

• * To review the diverse functions of viral-encoded miRNAs in silkworm-virus interactions.
• * To elucidate how viral miRNAs help pathogens evade host immunity and promote viral replication.
• * To provide an overview of miRNA biogenesis and mechanisms of action in this context.

Main Methods:

• * Literature review of existing research on viral miRNAs in Bombyx mori.
• * Analysis of studies detailing miRNA biogenesis and function.
• * Synthesis of information on viral strategies for host immune evasion.

Main Results:

• * Viruses, such as baculoviruses and cypoviruses, encode miRNAs to regulate both viral and host genes.
• * Viral miRNAs are essential for evading silkworm immune responses.
• * These miRNAs reshape the cellular environment to favor viral proliferation.

Conclusions:

• * Viral miRNAs are key players in silkworm-virus interactions, aiding pathogen survival and replication.
• * Understanding viral miRNA functions offers insights into intricate host-pathogen pathways.
• * This knowledge can lead to novel strategies for managing silkworm diseases.