DPP-mediated TGFβ signaling regulates juvenile hormone biosynthesis by activating the expression of juvenile hormone acid methyltransferase

May 12, 2011Development (Cambridge, England)

DPP-related TGFbeta signals control juvenile hormone production by turning on the enzyme that finalizes hormone synthesis

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Abstract

TGFβ signaling is essential for regulating juvenile hormone (JH) biosynthesis by influencing the expression of jhamt, a key enzyme.

  • Neuropeptides and neurotransmitters from the brain play a role in JH biosynthesis regulation.
  • A genetic screen in Drosophila identified Tkv and Mad as necessary for JH-mediated suppression of broad expression in young larvae.
  • TGFβ signaling enhances JH production by increasing jhamt expression.
  • Dpp hypomorphic mutants showed early broad expression, indicating disrupted JH regulation.
  • Pupal lethality in dpp mutants was partially alleviated by applying an exogenous JH agonist.
  • Glutamate, through Nmdar1, is linked to dpp expression changes in the corpus allatum.

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Full Text

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