Journal: bioRxiv
Article Title: Cellular and functional dissection of the octopaminergic system in the Drosophila brain
doi: 10.64898/2026.02.06.704492
Figure Lengend Snippet: ( A - F ) Representative images of females ( A 1 , B 1 , C 1 , D 1, E 1 , F 1 ) and male ( A 2 , B 2 , C 2 , D 2, E 2 , F 2 ) brains labeled by descending OA/TA neuron-specific split-GAL4 lines. Images of male ventral nerve cords ( A 3 , B 3 , C 3 , D 3, E 3 , F 3 ) are also shown. Panels show maximum intensity projections, with neuropils and membrane-bound tdTomato expressed by the given split-GAL4 line visualized by immunohistochemical analysis with anti-bruchpilot (top panels, blue) and 20XUAS-CsChrimson:tdTomato (top panels, anti-dsRed, green; bottom panels, black and white) respectively. Scale bar = 50 μm. Targeted cell types are indicated along with the split-GAL4 line name. ( A 4 , B 4 , C 4 , D 4, E 4,5 , F 4,5 ) Representative images of OA/TA cell neurons targeted by split-GAL4 line, visualized by cytosolic GFP (green), and TDC2 staining (magenta). Scale bar = 10 μm. ( G-J ) VUMd1 shows asymmetric innervations around the esophagus. ( G ) Representative images of single cell clones of VUMd1 neurons with thicker innervations on the left side obtained from OTA-SG37 ( G 1 ) and from Tdc2-GAL4 ( G 2,3 ) with MCFO technique in male flies, corresponding to GNG.SAD.12 in FAFB ( H ). ( I ) Clones of VUMd1 neurons with right bias innervations, obtained from Tdc2-GAL4 ( I 1,2 ) and OTA-SG37 ( I 3 ) with MCFO technique in male flies, corresponding to GNG.707 in FAFB ( J ). Scale bar = 50 μm. ( K ) Representative image of single cell clones of AL2b1 neurons ( K 1 ) and VUMd2 ( K 2 ) obtained from OTA-SG38 with MCFO technique in male flies. Scale bar = 50 μm. ( L ) Clonal analysis suggests the existence of two distinct VUMd2 subtypes. VUMd2 (a) ( L 1 ) present one lateral descending projection each side (only one side was visible in this sample) from the lateral inferior posterior slope. VUMd2 (b) ( L 2-5 ) presents additional finer neurites that run more centrally in the cervical connective (arrow, L 4,5 ). Non-VUMd2 neurons are indicated in yellow asterisks. Scale bar = 50 μm (L 1,2 ), 10 μm (L 5 ).
Article Snippet: Primary antibodies diluted with the blocking solution (1:10 (supernatant) or 1:100 (concentrated) for mouse anti-bruchpilot (BRP) (Developmental Studies Hybridoma Bank nc82, RRID: AB_2314866), 1:200 for mouse anti-tyrosine hydroxylase (Immunostar, cat# 22941, RRID: AB_572268), 1:1000 for chicken anti-GFP (Abcam, cat# ab13970, RRID: AB_300798), 1:1000 for rabbit anti-DsRed (Takara Bio USA, cat# 632496, RRID: AB_10013483), 1:100 for guinea pig anti-Fru M (gift from Michael Perry, University of California, San Diego) , 1:200 for rabbit anti-Tdc2 (Covalab, cat# 00013520, RRID: AB_3717820) and 1:1000 for rabbit anti-Nvy (gift from Richard Mann, Columbia University) ( ) were applied to the samples in 1.5mL tubes at 4°C for 2 days.
Techniques: Labeling, Membrane, Immunohistochemical staining, Staining, Single Cell, Clone Assay