Expression of CskScer\UAS.T:Avic\GFP-YFP driven simultaneously by Scer\GAL4elav-C155, Scer\GAL4sca.PC and Scer\GAL4C57 significantly increases miniature excitatory postsynaptic potential (mEPSP) amplitudes and significantly decreases evoked postsynaptic potentiation (EPSP) amplitude and quantal content at the neuromuscular junction (NMJ) of third instar larvae, compared to controls.
GluRIIASP16/GluRIIASP16;Cskc04256/Cskj1D8 third instar larvae show significant decreases in mEPSP (decreasing quantal size) but do not show significant compensatory homeostatic increases in quantal content (as seen in GluRIIASP16/GluRIIASP16 mutants alone) at the NMJ; additional expression of CskScer\UAS.T:Avic\GFP-YFP driven by Scer\GAL4nau.PM or Scer\GAL4VGlut-OK371 restores phenotypes to those seen in GluRIIASP16/GluRIIASP16 mutants alone.
Third instar larvae with co-expression of GluRIICdsRNA.Scer\UAS.cBa and CskScer\UAS.T:Avic\GFP-YFP driven simultaneously by Scer\GAL4elav-C155, Scer\GAL4sca.PC and Scer\GAL4C57 show significant decreases in mEPSP (decreasing quantal size) and show significant compensatory homeostatic increases in quantal content (as seen with expression of GluRIICdsRNA.Scer\UAS.cBa alone) at the NMJ.
Third instar GluRIIASP16/GluRIIASP16 larvae with co-expression of Fas2EP1462 and CskScer\UAS.T:Avic\GFP-YFP driven by Scer\GAL4C57 show significant decreases in mEPSP (decreasing quantal size) and show complete impairment of compensatory homeostatic increases in quantal content (compared to significant quantal content increases seen in GluRIIASP16/GluRIIASP16 mutants alone) at the NMJ.