Related Experiment Video
Updated: Nov 4, 2025
MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as A Novel Detection and Quantification Method
Published on: October 7, 2025
Genome-wide identification of miRNAs and target regulatory network in the invasive ectoparasitic mite Varroa
Paula L C Fonseca1, Jonathan J Mucherino M2, Joel A M Porto3
1Department of Microbiology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais CEP 30270-901, Brazil.
Abstract:
Varroa destructor is an ectoparasite mite that attacks bees leading to colony disorders worldwide. microRNAs (miRNAs) are key molecules used by eukaryotes to post-transcriptional control of gene expression. Nevertheless, still lack information aboutV. destructor miRNAs and its regulatory networks. Here, we used an integrative strategy to characterize the miRNAs in the V. destructor mite. We identified 310 precursors that give rise to 500 mature miRNAs, which 257 are likely mite-specific elements. miRNAs showed canonical length ranging between 18 and 25 nucleotides and 5' uracil preference. Top 10 elements concentrated over 80% of total miRNA expression, with bantam alone representing ~50%. We also detected non-templated bases in precursor-derived small RNAs, indicative of miRNA post-transcriptional regulatory mechanisms. Finally, we note that conserved miRNAs control similar processes in different organisms, suggesting a conservative role. Altogether, our findings contribute to the better understanding of the mite biology that can assist future studies on varroosis control.
Insights
This study identifies 500 microRNAs (miRNAs) in the Varroa destructor mite, including novel mite-specific ones. Understanding these miRNAs offers insights into bee parasite biology and potential varroosis control strategies.
Area of Science:
- Entomology
- Molecular Biology
- Genomics
Background:
- Varroa destructor mites are significant threats to bee colonies globally.
- MicroRNAs (miRNAs) regulate gene expression but their role in V. destructor is largely unknown.
Purpose of the Study:
- To characterize microRNAs (miRNAs) and their regulatory networks in the Varroa destructor mite.
- To provide a foundation for understanding mite biology and developing varroosis control methods.
Main Methods:
- Utilized an integrative strategy for miRNA identification and characterization in V. destructor.
- Analyzed miRNA precursors, mature miRNAs, length, nucleotide preference, and expression levels.
Main Results:
- Identified 310 miRNA precursors yielding 500 mature miRNAs, with 257 potentially mite-specific.
- Observed canonical miRNA lengths (18-25 nt) and 5' uracil preference.
- Found top 10 miRNAs, including 'bantam', comprised over 80% of total expression; detected post-transcriptional modifications.
Conclusions:
- The characterization of V. destructor miRNAs deepens understanding of mite molecular biology.
- Conserved miRNAs suggest a conserved regulatory role across organisms.
- Findings support future research into varroosis control by targeting mite-specific miRNAs.
Related Concept Videos
01:22MicroRNAs
01:22MicroRNAs