Journal: Science advances

Article Title: Optogenetic calcium modulation in astrocytes enhances post-stroke recovery in chronic capsular infarct.

doi: 10.1126/sciadv.adn7577

Figure Lengend Snippet: Fig. 1. Light-induced Ca2+ influx in astrocytes through OptoSTIM1 activation. (A) Fluorescence images of cultured astrocytes expressing RGECO1 along with OptoSTIM1 or ChR2(H134R). Scale bars, 20 μm. (B) Kymographs corresponding to the white dotted lines in (A), showing RGECO1 fluorescence upon light stimulation. (C) A graph illustrating changes in RGECO1 intensity upon light stimulation or NE (5 μM) treatment. (D) Graphs showing the time required to reach half-maximal intensity (left, Ta1/2, “a” refers to activation) and half-basal intensity from the maximal intensity of RGECO1 fluorescence (right, Td1/2, where “d” refers to deactivation) upon OptoSTIM1 activa- tion. (E) Schematic diagram and experimental timeline of the virus injection and two-photon Ca2+ imaging. Representative two-photon images of a brain slice demon- strate the viral expression of Lenti-GfaABC1D-OptoSTIM1 (green) and AAV-GfaABC1D-jRGECO1a (red) in the SPC. Scale bar, 100 μm. (F) Representative Ca2+ traces of RGECO1 intensity upon light stimulation. (G) A graph illustrating changes in the average fluorescent ratio for the GfaABC1D-EGFP and GfaABC1D-OptoSTIM1 groups. The purple-shaded area indicates the period of light stimulation. (H) Comparison of peak Ca2+ signals in the GfaABC1D-EGFP and GfaABC1D-OptoSTIM1 groups before and after light stimulation [repeated-measures two-way analysis of variance (ANOVA) with Sidak’s multiple comparisons, F1,24 = 130.6, P < 0.0001]. Error bars represent means ± SEM. ***P < 0.001; ns, nonsignificant.

Article Snippet: For construction of expression plasmid for ChR2(H134R)- mEGFP, the ChR2(H134R) sequence from ChR2- YFPNavII- III (Addgene plasmid #26057) was amplified by polymerase chain reaction (PCR) using ChR2(H134R)- F (5′-GACTGCTAGCGCCACCATGGACTATGGCGG-3′) and ChR2(H134R)- R (5’-GACTACCGGTGCTGGCACGGCTCCGGC-3′) primers.

Techniques: Activation Assay, Fluorescence, Cell Culture, Expressing, Virus, Injection, Imaging, Slice Preparation, Comparison

Journal: bioRxiv

Article Title: UBE3A and transsynaptic complex NRXN1-CBLN1-GluD1 in a hypothalamic VMHvl-arcuate feedback circuit regulates aggression

doi: 10.1101/2023.02.28.530462

Figure Lengend Snippet: VMHvl Tac1 neurons drive attack behavior and are the site where increased Ube3a gene dosage modeling a genetic ASD heightens aggression. (A) Representative images and traces of calcium events in three VMHvl Tac1 neurons expressing GCaMP7 recorded using Inscopix miniature microscope with implanted GRIN lens when the resident male in its home- cage is exposed to a male intruder (resident-intruder paradigm). (B) Left: diagram of stereotactic injections of AAV virus in Tac1-Cre ( Tac1 tm1.1(cre)Hze ) or Pgr-Cre ( Pgr tm1.1(cre)Shah ) mice. Right: upper panel: total attack time/number in Tac1-Cre mice ( n =7) injected with AAV-DIO- hM3D(Gq)-RFP, comparing application of saline and CNO (1 mg/kg i.p.). P value of total attack time ( P T ) = 0.0068, and P value of attack number ( P N ) = 0.0042. Lower panel: total attack time/number in Pgr-Cre mice ( n =7) injected with AAV-DIO-hM3D(Gq)-RFP, comparing application of saline and CNO (1 mg/kg i.p., P T = 0.0038, P N = 0.0165). ( C-E ) Total attack time and attack number in C, VGluT2-Cre ( Slc17a6 tm2(cre)Lowl ): LoxTB-Ube3a-2x mice ( n = 14) comparing LoxTB-Ube3a-2x littermates ( n = 9) ( P T = 0.026, P N = 0.042); D , Vgat -Cre ( Slc32a1 tm2(cre)Lowl ) :LoxTB-Ube3a-2x mice ( n =14) and LoxTB-Ube3a-2x littermates ( n = 12) ( P T = 0.9007, P N = 0.8203); E , Sf1-Cre (Tg(Nr5a1-cre)7Lowl): LoxTB-Ube3a-2x mice ( n = 14) and LoxTB-Ube3a-2x littermates ( n = 14) ( PT = 0.0056, P N = 0.0085). Below, anti-FLAG antibody immunofluorescence in ventromedial hypothalamus (VMH), scale bars 200 μm. ( F ) Left: upper panel: diagram of construct of AAV-hSyn-DIO-Ube3a and stereotactic injections. Lower panel: representative image of anti-GFP antibody immunofluorescence in VGluT2 -Cre mice injected with AAV-hSyn-DIO-Ube3a and AAV-hSyn-DIO-GFP in VMHvl, scale bar, 50 μm. Right: total attack time/number in VGluT2 -Cre mice injected with AAV-hSyn-DIO- Ube3a:AAV-DIO-GFP ( n = 16), compared to wild type littermates with AAV-CMV-GFP ( n = 11, P T = 0.0373, P N = 0.0394) in VMHvl. ( G ) Left: diagram of construct of Cre-inactivate-able Ube3a BAC Transgenic ( Ube3a OFF#5; figS2I, a conditional Ube3a transgene where LoxP site flank exons of the full-length untagged Ube3a gene) and stereotactic injections. Right: total attack time/number in Ube3a OFF#5 mice injected with AAV-CMV-CreGFP ( n = 25) in VMHvl compared to AAV-CMV-GFP ( n = 18, P T = 0.0146, P N = 0.0385). ( H ) Left: diagram of construct of AAV-hSyn-DIO-Ube3a, stereotactic injections. Middle: representative image of anti-GFP antibody immunofluorescence staining in Tac1 Cre mice injected with AAV-hSyn-DIO- Ube3a and AAV-hSyn-DIO-GFP in VMHvl (scale bar, 50 μm). Right: total attack time/number in Tac1-Cre mice injected with AAV-hSyn-DIO-Ube3a:AAV-DIO-GFP ( n = 11) in VMHvl, compared to wild type littermates injected with AAV-CMV-GFP ( n = 16, P T = 0.025, P N = 0.0443). ( I ) Total attack time/number in Pgr-Cre mice injected with AAV-hSyn-DIO- Ube3a:AAV-DIO-GFP ( n = 17) in VMHvl, compared to wild type littermates injected with AAV-CMV-GFP ( n = 10, P T = 0.026, P N = 0.032). ( J ) Total attack time/number in wild type ( n = 23) mice, comparing with Ube3a-1x ( n = 10, P T = ns, P N =ns); with Ube3a-NLS3-1x mice ( n = 12, P T < 0.0001, P N < 0.0001); and with Ube3a-NLS7-1x mice ( n = 8, P T < 0.0001, P N < 0.0001). ( K ) Total attack time/number in Tac1-Cre mice injected with AAV-DIO-GFP + AAV-DIO- Ube3a-NLS ( n =11) in VMHvl, compared to AAV-DIO-GFP ( n = 11) ( P T =0.0130, P N =0.0183). ( L ) Calcium events in VMHvl Tac1 neurons recorded using Inscopix miniature microscope, compared Tac1-Cre mice injected with AAV9-hSyn-DIO-GCaMP7f ( n = 7 cells) to AAV-DIO- Ube3a-NLS:AAV9-hSyn-DIO-GCaMP7f ( n = 17 cells, P =0.0261; unpaired T-test with Welch’s correction). Unpaired two-tailed Student’s t-test was used to determine statistical significance when comparing two groups. Comparisons across two groups before and after CNO treatment analyzed by paired two-tailed Student’s t-test. Multiple groups were analyzed using 1-way ANOVA followed by Bonferroni’s Multiple Comparison Correction. Mean ± SEM shown, ns P > 0.05, * P < 0.05, ** P < 0.01.

Article Snippet: The Ube3a expression construct was generated by amplifying the coding sequence of human Ube3a isoform III from Plasmid #37605 (Addgene) with primers 5’-TCTTCCACTAGTGCCACCATGGCCACAGCTTGTAAAAGATC-3’ and 5’-TCTTCCGGATCCTTACAGCATGCCAAATCCTTTGG-3’ and subcloning into the SpeI and BamHI sites of the pLVX-IRES-mCherry vector (Clontech Cat#631237).

Techniques: Expressing, Microscopy, Virus, Injection, Saline, Immunofluorescence, Construct, Transgenic Assay, Staining, Two Tailed Test, Comparison

Journal: bioRxiv

Article Title: UBE3A and transsynaptic complex NRXN1-CBLN1-GluD1 in a hypothalamic VMHvl-arcuate feedback circuit regulates aggression

doi: 10.1101/2023.02.28.530462

Figure Lengend Snippet: Ube3a genetic and molecular constructs. (A ) Diagram of chromosome abnormality of maternal 15q11-13 interstitial duplication, maternal extranumerary isodicentric chromosome 15 (idic 15) and Angelman syndrome. ( B ) Diagram of construct of Ube3a 3xFlag transgenic mice with extra gene copies of full-length Ube3a gene. ( C ) Diagram of Ube3aNLS with 3xFLAG and nuclear localization signal (NLS) followed by a STOP codon added in frame to exon 12 of mouse Ube3a gene. ( D ) Photos of injured mice from cages with Ube3a-2x male mice. ( E ) Total attack time/number in wild type ( n =23) and Ube3a-2x mice ( n = 9, P T = 0.0007 and P N = 0.0003). ( F ) Diagram of LoxTB-Ube3a construct with transcriptional/translational stop cassette (red) containing an En2 splice acceptor (grey) followed by polyA tails (black), all flanked by LoxP sites and inserted into intron 1 of full-length FLAG- tagged Ube3a gene designed to block all potential splice isoforms. ( G ) Upper panel: total attack time/number in LoxTB-Ube3a-2x mice ( n = 20) comparing to ePet-Cre (Tg(Fev-cre)1Esd): LoxTB- Ube3a-2x mice ( n = 9) ( P T = 0.7520, P N = 0.9340). Lower panel: FLAG immunofluorescence in dorsal raphe, scale bar 100 μm. ( H ) Diagram of construct of AAV-hSyn-DIO-Ube3a that expresses Ube3a in a Cre-dependent manner. ( I ) Diagram of construct of Ube3a OFF#5, a conditional Ube3a transgene where LoxP site flank exons of the full-length untagged Ube3a gene. P < 0.05 was considered statistically significant with ns indicating non-significant, * P <0.05, ** P < 0.01, *** P <0.001 and **** P <0.0001.

Article Snippet: The Ube3a expression construct was generated by amplifying the coding sequence of human Ube3a isoform III from Plasmid #37605 (Addgene) with primers 5’-TCTTCCACTAGTGCCACCATGGCCACAGCTTGTAAAAGATC-3’ and 5’-TCTTCCGGATCCTTACAGCATGCCAAATCCTTTGG-3’ and subcloning into the SpeI and BamHI sites of the pLVX-IRES-mCherry vector (Clontech Cat#631237).

Techniques: Construct, Transgenic Assay, Blocking Assay, Immunofluorescence

Journal: bioRxiv

Article Title: UBE3A and transsynaptic complex NRXN1-CBLN1-GluD1 in a hypothalamic VMHvl-arcuate feedback circuit regulates aggression

doi: 10.1101/2023.02.28.530462

Figure Lengend Snippet: Aggression is increased by nuclear-targeted UBE3A expression in VMHvl Tac1-Cre neurons but not in VMHdm of Sf1-Cre neurons. ( A ) Diagram of stereotaxic injection. ( B ) Representative image of GFP expression in VMHvl Tac1 neurons when stereotactically injecting AAV-DIO-Ube3a-NLS + AAV-DIO-GFP virus into VMHvl of Tac1-Cre male mice (scale bar, 100 μm). ( C ) Left: representative photo of female mouse with hind injury. Right: number of male mice that injured female added to their cages in Tac1-Cre mice injected with AAV-DIO-GFP + AAV-DIO-Ube3aNLS ( n = 11 mice) compared to AAV-DIO-GFP ( n = 11 mice) in VMHvl ( P = 0.032). ( D ) Diagram of stereotaxic injection. ( E ) Representative image of GFP expression in VMH Sf1 neurons when stereotactically injecting AAV-DIO-Ube3a-NLS+ AAV-DIO-GFP virus into VMHdm of Sf1-Cre male mice (scale bar, 100 μm). ( F ) Total attack time/number in Sf1-Cre male mice compared stereotactically injecting AAV-DIO-Ube3a-NLS+ AAV-DIO-GFP virus ( n = 14) into VMHdm of Sf1-Cre male mice with only AAV-DIO-GFP ( n = 10, P T = 0.2002, P N = 0.2460). ( G ) Combined data of quantitative RT-qPCR of Cbln1 and Syn1 mRNA from single neurons isolated from VMHvl in Sf1-Cre : Cbln1 flx/flx ( n = 24 neurons, green bar) comparing to Cbln1 flx/flx ( n = 28 neurons, black bar) ( P = 0.0003). P < 0.05 was considered statistically significant with ns indicating non-significant, * P <0.05, ** P < 0.01, *** P <0.001 and **** P <0.0001.

Article Snippet: The Ube3a expression construct was generated by amplifying the coding sequence of human Ube3a isoform III from Plasmid #37605 (Addgene) with primers 5’-TCTTCCACTAGTGCCACCATGGCCACAGCTTGTAAAAGATC-3’ and 5’-TCTTCCGGATCCTTACAGCATGCCAAATCCTTTGG-3’ and subcloning into the SpeI and BamHI sites of the pLVX-IRES-mCherry vector (Clontech Cat#631237).

Techniques: Expressing, Injection, Virus, Quantitative RT-PCR, Isolation

Journal: bioRxiv

Article Title: UBE3A and transsynaptic complex NRXN1-CBLN1-GluD1 in a hypothalamic VMHvl-arcuate feedback circuit regulates aggression

doi: 10.1101/2023.02.28.530462

Figure Lengend Snippet: UBE3A represses Cbln1 gene expression and synergizes with a loss of NRXN1- CBLN1-GRID1 transsynaptic complex members to promote aggression. (A) Quantitative RT-PCR of Cbln1 mRNA in VMH in wild type littermate ( n = 6), and Ube3a-NLS-1x transgenic mice ( n = 6, P = 0.0317). (B) Cbln1 5’ promoter sequence (1.3 kb) driving luciferase reporter with co-transfected Ube3a ( n = 6), comparing to mock plasmid ( n = 6, P < 0.0001). Diagram shows the luciferase reporter construct. (C) The ratio of Cbln1 promoter DNA immunoprecipitated from cortex samples, relative to input chromatin, compared anti-UBE3A antibody to “Mock” rabbit IgG ( n = 3, P = 0.015). Diagram shows FAM/ZEN probe location. ( D ) Total attack time/number in mice with Sf1 - Cre : Cbln1 flx/flx ( n = 26) compared to Cbln1 flx/flx littermates ( n = 18, P T = 0.0098, P N = 0.0180). ( E ) Total attack time/number in Cbln1 flx/flx mice with injected AAV-CMV-CreGFP ( n = 23) vs. AAV-CMV-GFP ( n =16) in VMHvl ( P T = 0.0418, P N = 0.0413). ( F ) Total attack time/number in mice with Tac1-Cre / Cbln1 flx/flx ( n = 17) compared to Cbln1 flx/flx littermates ( n = 13, P T = 0.0285, P N = 0.0313). ( G ) Total attack time/number in Tac1-Cre mice injected with AAV-DIO-Ube3a-NLS ( n = 10), comparing with AAV-DIO-Cbln1 + AAV-DIO-Ube3aNLS ( n = 14, P T = 0.030, P N = 0.0245) in VMHvl. ( H ) Diagram of protein physical interactions between CBLN1, NRXN1, and GRID1. ( I ) Number of ASD cases with genomic copy number variations (CNVs) encompassing genes UBE3A, NRXN1 and GRID1 including duplications/triplications (Dup) and deletions (Del). ( J ) Total attack time/number in wild type littermates (n=4), Nrxn1 heterozygous ( n = 12, P T = ns, P N = ns) and Nrxn1 homozygous deletion mice ( n = 5, P T = 0.009, P N = 0.006). ( K ) Total attack time/number in mice with Ube3a-1x ( n = 14), compared to Ube3a-1x and Nrxn1 +/- (n = 20, P T = 0.0261, P N = 0.0257). ( L ) Total attack time/number in wild type littermates ( n = 12), Grid1 heterozygous ( n = 22) and Grid1 homozygous deletion mice ( n = 16, P T = 0.0023, P N = 0.0018). ( M ) Total attack time/number in mice with Ube3a-1x ( n = 20), compared to Ube3a-1x and Grid1 +/- ( n = 20, P T = 0.012, P N = 0.0085). An unpaired two-tailed Student’s t-test was used to determine statistical significance when comparing two groups. Mean ± SEM shown, ns P > 0.05, * P < 0.05, ** P < 0.01, *** P < 0.001.

Article Snippet: The Ube3a expression construct was generated by amplifying the coding sequence of human Ube3a isoform III from Plasmid #37605 (Addgene) with primers 5’-TCTTCCACTAGTGCCACCATGGCCACAGCTTGTAAAAGATC-3’ and 5’-TCTTCCGGATCCTTACAGCATGCCAAATCCTTTGG-3’ and subcloning into the SpeI and BamHI sites of the pLVX-IRES-mCherry vector (Clontech Cat#631237).

Techniques: Gene Expression, Quantitative RT-PCR, Transgenic Assay, Sequencing, Luciferase, Transfection, Plasmid Preparation, Construct, Immunoprecipitation, Injection, Two Tailed Test

Journal: bioRxiv

Article Title: UBE3A and transsynaptic complex NRXN1-CBLN1-GluD1 in a hypothalamic VMHvl-arcuate feedback circuit regulates aggression

doi: 10.1101/2023.02.28.530462

Figure Lengend Snippet: Images of anti-c-fos staining and quantification of c-fos positive neurons after aggression behavior test comparing Ube3a-2x with littermate control mice. ( A ) Total attack time/number in aggression behavior test compared Ube3a-2x (n = 3) and littermate control mice (n = 3, P T = 0.0035, P N = 0.0133). ( B ) and ( C ) Counts of c-fos positive neurons in ventral premamillary (PMv) ( B , P = 0.3731) and full VMHvl ( C , P = 0.3167) after aggression behavior test compared Ube3a-2x compared to control littermate mice. ( D ) Representative image of anti-c-fos antibody staining in dorsal raphe compared Ube3a-2x and control littermate mice (scale bar, 100 microns). ( E ) Counts of c-fos positive neurons in dorsal raphe ( P = 0.0217) after aggression behavior testing comparing Ube3a-2x and control littermate mice. ( F ) Representative image of anti-c-fos antibody staining in MEA compared Ube3a-2x and control littermate mice (scale bar, 100 microns). ( G ) Counts of c-fos positive neurons in MEA ( P = 0.1150) after aggression behavior test. All c-fos studies compared male Ube3a-2x ( n = 3 mice) and control littermate mice ( n = 3 mice). P < 0.05 was considered statistically significant with ns indicating non-significant, * P <0.05, ** P < 0.01, *** P <0.001 and **** P <0.0001.

Article Snippet: The Ube3a expression construct was generated by amplifying the coding sequence of human Ube3a isoform III from Plasmid #37605 (Addgene) with primers 5’-TCTTCCACTAGTGCCACCATGGCCACAGCTTGTAAAAGATC-3’ and 5’-TCTTCCGGATCCTTACAGCATGCCAAATCCTTTGG-3’ and subcloning into the SpeI and BamHI sites of the pLVX-IRES-mCherry vector (Clontech Cat#631237).

Techniques: Staining, Control

Journal: bioRxiv

Article Title: UBE3A and transsynaptic complex NRXN1-CBLN1-GluD1 in a hypothalamic VMHvl-arcuate feedback circuit regulates aggression

doi: 10.1101/2023.02.28.530462

Figure Lengend Snippet: Loss of postsynaptic glutamate receptor delta subunit gene Grid1 in arcuate AgRP/NPY neurons impairs their glutamatergic synapses to increase aggression. (A) Representative image of anti-c-fos antibody immunofluorescence staining in PAG after aggression behavior test compared Ube3a-2x mice with their little mate control (scale bar, 100 μm). (B) Representative image of anti-c-fos staining in arcuate and VMHvl compared Ube3a-2x mice with control (scale bar, 100 μm). C, D, E, F, Quantitatively counting c-fos positive neurons in PAG (C, P = 0.0396); BNST (D, P = 0.4578); arcuate (E, P = 0.0249) and a selection of region of VMHvl ( F , P = 0.0472) after aggression behavior test compared Ube3a-2x mice with their littermate control. ( G ) In situ hybridization of parasagittal VMH-arcuate hypothalamus sections probed for Nrxn1 , Cbln1 , and Grid1 mRNA (adapted from Allen Mouse Brain Atlas (2004)). ( H ) Total attack time/number in mice with Vglut2-Cre : Grid1 flx/flx ( n = 16) compared to Grid1 flx/flx littermates ( n = 23, P T = 0.2612, P N = 0.3579). ( I ) Total attack time/number in mice with Vgat-Cre : Grid1 flx/flx ( n = 13) compared to Grid1 flx/flx littermates ( n = 16, P T = 0.7061, P N = 0.7208). ( J ) Total attack time/number in mice with Pomc-Cre (Tg(Pomc1-cre)16Lowl): Grid1 flx/flx ( n = 19) compared to Grid1 flx/flx littermates ( n = 17, P T = 0.1682, P N = 0.0753). ( K ) Total attack time/number in mice with Agrp-Cre ( Agrp tm1(cre)Lowl ): Grid1 flx/flx ( n = 12) compared to Grid1 flx/flx littermates ( n = 9, P T = 0.0067, P N = 0.0498). ( L ) Diagram of stereotactic injections. ( M ) Total attack time/number in Pomc-Cre mice injected with AAV-TATAlox-Grid1-shRNA ( n = 11) in arcuate, comparing to WT mice injected with AAV-TATAlox-Grid1-shRNA ( n = 17, P T = 0.3212, P N = 0.272). ( N ) Total attack time/number in Agrp-Cre mice injected with AAV-TATAlox-Grid1-shRNA ( n = 32) in arcuate, comparing to mice injected with AAV-TATAlox-scrambled-shRNA ( n = 20, P T = 0.0403, P N = 0.0360). ( O ) Cumulative frequency plot of miniature excitatory post-synaptic current (mEPSC) inter-event intervals in arcuate NPY GFP + neurons in mice with homozygous deletion Grid1 ( n = 4 mice, 16 cells) and control mice ( n = 5 mice, 14 cells), Kolmogorov-Smirnov (KS) test, P < 0.00001. ( P ) Cumulative frequency plot of miniature excitatory post-synaptic current (mEPSC) inter-event intervals in arcuate NPY GFP + neurons (labeled by Npy-hrGFP allele; B6.FVB-Tg(Npy-hrGFP)1Lowl/J) in mice with Grid1 knockout ( Agrp-Cre : Grid1 flx/flx ) in arcuate Agrp/NPY neurons ( n = 6 mice, 11 neurons) compared to control wild type mice ( n = 4 mice, 14 cells,). ( Q ) Cumulative frequency plot of miniature excitatory post-synaptic current (mEPSC) inter-event intervals in arcuate NPY GFP + neurons (labeled by Npy-hrGFP allele) in mice with Grid1 knockdown (AAV-hSyn-TATAlox-Grid1-shRNA vs. scrambled) in arcuate Agrp/NPY neurons ( n = 3 mice, 6 neurons) compared to control wild type mice ( n = 6 mice, 18 cells). An unpaired two-tailed Student’s t-test was used to determine statistical significance when comparing two groups. Multiple groups (Fig. -F ) are analyzed using repeated two-way ANOVA with Multiple Comparison. mEPSC inter-event intervals and amplitude are analyzed using Kolmogorov-Smirnov (KS) test. Mean ± SEM shown, ns P > 0.05, * P < 0.05, ** P < 0.01, *** P < 0.001, **** P < 0.0001. See also and S6.

Article Snippet: The Ube3a expression construct was generated by amplifying the coding sequence of human Ube3a isoform III from Plasmid #37605 (Addgene) with primers 5’-TCTTCCACTAGTGCCACCATGGCCACAGCTTGTAAAAGATC-3’ and 5’-TCTTCCGGATCCTTACAGCATGCCAAATCCTTTGG-3’ and subcloning into the SpeI and BamHI sites of the pLVX-IRES-mCherry vector (Clontech Cat#631237).

Techniques: Immunofluorescence, Staining, Control, Selection, In Situ Hybridization, Injection, shRNA, Labeling, Knock-Out, Knockdown, Two Tailed Test, Comparison

Journal: bioRxiv

Article Title: UBE3A and transsynaptic complex NRXN1-CBLN1-GluD1 in a hypothalamic VMHvl-arcuate feedback circuit regulates aggression

doi: 10.1101/2023.02.28.530462

Figure Lengend Snippet: NRXN1-CBLN1-GRID1 transsynaptic complex forms excitatory synapses from VMHvl to arcuate NPY/AgRP neurons which provide feedback inhibition to VMHvl that is augmented by aggression medication risperidone. (A) Left: diagram of stereotactic injections. Right: representative image of anti-DsRed antibody immunofluorescence staining in Agrp-Cre mice injected with AAV-DIO-hM4D(Gq)-RFP in arcuate (scale bar, 30 μm). (B) Total attack time/number in Agrp-Cre mice with AAV-DIO-hM4D(Gi)-RFP injected in arcuate, comparing application of saline with CNO (1 mg/kg i.p., n = 19, P T = 0.0016, P N = 0.001). (C) Total attack time/number in Agrp-Cre mice with AAV-DIO-hM3D(Gq)-RFP injected in arcuate, comparing application of saline with CNO (1 mg/kg i.p., n = 25, P T = 0.0035, P N = 0.0062). (D) Diagram of VMHvl-arcuate circuit with light-excitation of arcuate AgRP neuron axon terminals expressing ChR2. ( E ) Representative image of AgRP/NPY axons (green, Npy-hrGFP transgenic mice) surrounding VMHvl neurons (red, labelled by AAV-VGlut2-mCherry, scale bar 15 μm). ( F ) Representative trace of recorded VMHvl neuron hyperpolarized by light-stimulated arcuate AgRP/NPY neuron axons. ( G ) Amplitude of light-evoked hyperpolarization in VMHvl neurons with stimulation of arcuate neurons axons in control wild type mice ( n = 6 mice, 25 neurons, -4.40 ± 0.50 mV), or mice treated with risperidone ( n = 4 mice, 11 neurons, -8.29 ± 0.98 mV). P = 0.0030 for control vs. risperidone treatment. ( H ) Total attack time/number in Ube3a-2x mice with risperidone treatment (1 mg/kg i.p., n = 25) comparing to saline treatment (n = 24, P t = 0.0475, P N = 0.0291). ( I ) Diagram of VMHvl-arcuate circuit with light-excitation of VMHvl glutamatergic neuron axon terminals. ( J ) Left: Diagram of stereotactic injections; and a representative image showing that labeled AgRP/NPY neurons (green, Npy-hrGFP mice) are surrounded by ChR2- expressing axons from VMHvl glutamate neurons (red, scale bar 15 μm). Right: representative trace of light-evoked AMPA excitatory post-synaptic currents (EPSCs) recorded in arcuate NPY GFP + neurons by stimulating VMHvl terminals projecting to arcuate NPY neurons. ( K ) Amplitude of light-evoked EPSCs recorded in arcuate NPY GFP + neurons when stimulating VMHvl ChR2- expressing terminals projecting to arcuate NPY neurons in mice with homozygous Nrxn1 deletion ( n = 5 mice, 14 neurons), Grid1 deletion ( n = 6 mice, 11 cells), Cbln1 deletion in VMHvl ( (n = 4 mice, 13 neurons) or increased nuclear UBE3A (VGluT2-Cre mice with AAV-hSyn-DIO-Ube3a- NLS in VMHvl) ( n = 4 mice, 13 neurons); compared to control wild type mice ( n = 8 mice, 31 cells). The P value of one-way ANOVA is <0.0001; the P values of Bonferroni’s multiple comparisons test are: P = 0.0039 for Nrxn1 KO vs. WT; P = 0.0004 for Cbln1 KO vs. WT; P = 0.0047 for Grid1 KO vs. WT; P = 0.0012 for increasing nuclear UBE3A vs. WT. ( L ) Amplitude of light-evoked EPSCs recorded in arcuate NPY GFP + neurons by stimulating VMHvl terminals projecting to arcuate NPY neurons in mice injected with AAV-hSyn-DIO-Ube3a-NLS in VMHvl ( n = 4 mice, 13 neurons) compared to AAV-hSyn-DIO-Cbln1 + AAV-hSyn-DIO-Ube3aNLS ( n = 7 mice, n = 23 neurons, P = 0.0409). ( M ) Model where VMHvl neurons form excitatory glutamatergic synapses onto arcuate NPY/AgRP neurons, which provide feedback inhibition by hyperpolarizing VMHvl neurons, serving as a gate to limit aggression. Paired two-tailed Student’s t-test was used for comparisons across two groups before and after CNO treatment in panel B , C. Multiple groups (panel K ) are analyzed using one-way ANOVA with Bonferroni’s Multiple Comparison Correction. Unpaired two-tailed Student’s t-test was used to determine statistical significance of panel G , H , I . Mean ± SEM shown, ns P > 0.05, * P < 0.05, ** P < 0.01, *** P <0.001.

Article Snippet: The Ube3a expression construct was generated by amplifying the coding sequence of human Ube3a isoform III from Plasmid #37605 (Addgene) with primers 5’-TCTTCCACTAGTGCCACCATGGCCACAGCTTGTAAAAGATC-3’ and 5’-TCTTCCGGATCCTTACAGCATGCCAAATCCTTTGG-3’ and subcloning into the SpeI and BamHI sites of the pLVX-IRES-mCherry vector (Clontech Cat#631237).

Techniques: Inhibition, Immunofluorescence, Staining, Injection, Saline, Expressing, Transgenic Assay, Control, Labeling, Two Tailed Test, Comparison

Journal: bioRxiv

Article Title: UBE3A and transsynaptic complex NRXN1-CBLN1-GluD1 in a hypothalamic VMHvl-arcuate feedback circuit regulates aggression

doi: 10.1101/2023.02.28.530462

Figure Lengend Snippet: Miniature excitatory postsynaptic current (mEPSC) inter-event intervals and amplitude in arcuate NPY-GFP neurons of mice with deletion of Nrxn1 , Cbln1 or Ube3aNLS7-1x . (A) Left: Cumulative frequency plot of mEPSC inter-event intervals in arcuate NPY GFP + neurons in mice with homozygous deletion of Nrxn1 ( n = 6 mice, 19 cells) and control mice ( n = 5 mice, 14 cells, KS test, P < 0.00001); Right: diagram of whole–cell patch-clamp recordings were performed in GFP-labeled arcuate NPY/AgRP neurons. ( B ) Cumulative frequency plot of mEPSC amplitude in arcuate NPY GFP + neurons (labeled by NPY-hrGFP allele) in mice with homozygous deletion of Nrxn1 ( n = 6 mice, 19 cells) and control mice ( n = 5 mice, 14 cells, KS test, P > 0.05). ( C ) mEPSC inter-event intervals in arcuate NPY GFP + neurons from Sf1-Cre : Cbln1-flx/flx mice ( n = 5 mice, 19 cells) and control mice ( n = 5 mice, 14 cells, KS test, P < 0.001). ( D ) Cumulative frequency plot of mEPSC amplitude in arcuate NPY GFP + neurons in mice with Sf1-Cre : Cbln1 flx/flx ( n = 5 mice, 19 cells) and control mice ( n = 5 mice, 14 cells, KS test, P < 0.001). ( E ) mEPSC inter-event intervals in arcuate NPY GFP + neurons in mice with Ube3a- NLS7 - 1x ( n = 5 mice, 17 cells) and control mice ( n = 5 mice, 14 cells, KS test, P < 0.00001). ( F ) Cumulative frequency plot of mEPSC amplitude in arcuate NPY GFP + neurons in mice with Ube3aNLS7-1x ( n = 5 mice, 17 cells) and control mice ( n = 5 mice, 14 cells, KS test, P > 0.05). ( G ) Diagram of injection of AAV-hSyn-DIO-ChR2- mCherry plus AAV-VGlut2-Cre-2A- mCherry into VMHvl and representative image of VMHvl neurons expressing mCherry. ( H ) Diagram of whole–cell patch-clamp recordings performed in mCherry-labeled VMHvl neuron and representative trace of light-evoked ChR2 currents recorded in a VMHvl neuron. ( I ) Diagram of AAV-hSyn-DIO-GFP plus AAV-VGlut2-mCherry injected into VMHvl of VGluT2-Cre mice and representative image of VMHvl glutamate neurons showing overlapping expression of GFP and mCherry. Statistical significance of inter-event intervals and amplitude of mEPSC was determined by Kolmogorov-Smirnov (KS) test. P < 0.05 was considered statistically significant with ns indicating non-significant, * P <0.05, ** P < 0.01, *** P <0.001 and **** P <0.0001.

Article Snippet: The Ube3a expression construct was generated by amplifying the coding sequence of human Ube3a isoform III from Plasmid #37605 (Addgene) with primers 5’-TCTTCCACTAGTGCCACCATGGCCACAGCTTGTAAAAGATC-3’ and 5’-TCTTCCGGATCCTTACAGCATGCCAAATCCTTTGG-3’ and subcloning into the SpeI and BamHI sites of the pLVX-IRES-mCherry vector (Clontech Cat#631237).

Techniques: Control, Patch Clamp, Labeling, Injection, Expressing