larval neuroblast & larval brain, with Scer\GAL4wor.PA
Second instar larvae expressing Dap160Scer\UAS.cMa under the control of Scer\GAL4wor.PA have an increased number of neuroblasts per brain lobe compared to wild-type controls.
Third instar larvae expressing Dap160Scer\UAS.cMa under the control of Scer\GAL4wor.PA have an reduced number of neuroblasts per brain lobe compared to wild-type controls.
Dap160UAS.cMa, Scer\GAL4elav.PLu, Synj+tKa, sraUAS.Tag:HA has abnormal neurophysiology phenotype
Dap160UAS.cMa, Scer\GAL4elav.PLu, Synj+tKa, sraUAS.Tag:HA has abnormal neuroanatomy | larval stage phenotype
Dap160UAS.cMa, Scer\GAL4elav.PLu, Synj+tKa, sraUAS.Tag:HA has abnormal locomotor behavior | adult stage phenotype
Dap160UAS.cMa, Scer\GAL4elav.PLu, Synj+tKa, sraUAS.Tag:HA has bouton | increased number | larval stage phenotype
The evoked excitatory postsynaptic potential (EPSP) amplitude during a 5 minute stimulation at 10 Hz shows a significantly steeper decline in triple transgenic synj+tKa Dap160Scer\UAS.cMa sraScer\UAS.cCa Scer\GAL4elav.PLu flies compared to controls. (This effect is not seen when double or single transgenes are expressed.) No significant difference is seen in miniature EPSP frequency or amplitude between the triple transgenics and controls.
Dye uptake/unloading assays demonstrate that neuromuscular junctions of triple transgenic synj+tKa Dap160Scer\UAS.cMa sraScer\UAS.cCa Scer\GAL4elav.PLu larvae show a delay in the rate of vesicle uptake, generating an overall defect in endocytosis. Exocytosis and vesicle pool size are unaffected.
Triple transgenic synj+tKa Dap160Scer\UAS.cMa sraScer\UAS.cCa Scer\GAL4elav.PLu larvae show significantly impaired locomotor activity compared to controls. Triple transgenic adult flies fall more frequently and fail to climb the sides of the vial when mechanical stress is applied - their movement becomes normal after some recovery time.
Neuromuscular junctions of triple transgenic synj+tKa Dap160Scer\UAS.cMa sraScer\UAS.cCa Scer\GAL4elav.PLu larvae exhibit a ~2.5-fold increase in small satellite boutons. Double transgenic synj+tKa sraScer\UAS.cCa Scer\GAL4elav.PLu larvae show a similar phenotype, though double transgenic synj+tKa Dap160Scer\UAS.cMa Scer\GAL4elav.PLu or Dap160Scer\UAS.cMa sraScer\UAS.cCa Scer\GAL4elav.PLu do not.
Neuromuscular junctions of triple transgenic synj+tKa Dap160Scer\UAS.cMa sraScer\UAS.cCa Scer\GAL4elav.PLu larvae exhibit an increase in number but a decrease in size of synaptic boutons.