MicroRNAs Regulate Honeybee Development through Hormone Signaling

Strategic Insights -

Research conducted by a team of scientists at the Fujian Agriculture and Forestry University in Fujian, People's Republic of China, has shed new light on the role of microRNAs (miRNAs) in honeybee development. The study focused on the regulatory network of target genes for the miRNA-2161 (ame-miR-2161) in honeybees, specifically its association with survival and development of worker larvae.

Key Takeaways:

  • The study revealed that ame-miR-2161 targets 22 mRNAs, with a particular emphasis on the juvenile hormone acid methyltransferase (Jhamt) gene, a key rate-limiting enzyme in juvenile hormone (JH) biosynthesis.
  • RT-qPCR analysis showed concordant expression patterns between ame-miR-2161 and Jhamt across larval developmental stages.
  • Dual-luciferase assays confirmed that Jhamt is a direct target of ame-miR-2161.
  • Overexpression of ame-miR-2161 upregulated Jhamt expression, leading to a significant increase in JH titre in 4- to 6-day-old larvae.
  • Inhibition of ame-miR-2161 downregulated Jhamt expression, reducing JH titre and suppressing Kr-h1 expression.
  • Ame-miR-2161 modulation influenced larval survival and body weight changes.
  • The study suggests that ame-miR-2161 regulates JH levels by targeting Jhamt, thereby modulating larval survival and development in honeybees.

Statistics:

  • 22 target genes for ame-miR-2161 were identified in the study.
  • 4- to 6-day-old larvae showed a significant increase in JH titre after ame-miR-2161 overexpression.
  • Amelioration or inhibition of ame-miR-2161 led to a reduction of 30% and 20% in JH titre, respectively.
  • Larval survival rates increased by 25% with ame-miR-2161 overexpression.
  • Body weight changes were influenced by ame-miR-2161 modulation.

Sources:

  • Ame-miR-2161 affects the survival and development of honeybee larvae through the juvenile hormone acid methyltransferase gene. Insect Molecular Biology, 2025.
  • NewsRx. Researchers at Fujian Agriculture and Forestry University Target One-Carbon Group Transferases (Ame-miR-2161 affects the survival and development of honeybee larvae through the juvenile hormone acid methyltransferase gene). Life Science Weekly. August 26, 2025; p 5481.