To determine if transcriptional changes in C9ORF72+/− and C9ORF72−/− iMNs also reflect the contribution of C9ORF72 protein levels to neurodegeneration, we performed RNA sequencing on flow-purified Hb9::RFP+ iMNs from C9ORF72+/−, C9ORF72−/−, and isogenic control iMNs, as well as C9ORF72 patient iMNs (Supplementary Table 7), and compared them to existing RNA-seq data from postmortem tissue 34,35. When examining consensus genes that were differentially expressed compared to controls in all C9ORF72 patient postmortem datasets (from GSE56504 and GSE67196)34,35, both C9ORF72+/− and C9ORF72 patient iMNs shared similar gene expression changes to the postmortem tissue (Supplementary Fig. 6). Thus, a reduction in C9ORF72 levels induces disease-associated transcriptional changes observed in C9ORF72 patient postmortem samples.
To determine if transcriptional changes in C9ORF72+/− and C9ORF72−/− iMNs also reflect the contribution of C9ORF72 protein levels to neurodegeneration, we performed RNA sequencing on flow-purified Hb9::RFP+ iMNs from C9ORF72+/−, C9ORF72−/−, and isogenic control iMNs, as well as C9ORF72 patient iMNs (Supplementary Table 7), and compared them to existing RNA-seq data from postmortem tissue 34,35. When examining consensus genes that were differentially expressed compared to controls in all C9ORF72 patient postmortem datasets (from GSE56504 and GSE67196)34,35, both C9ORF72+/− and C9ORF72 patient iMNs shared similar gene expression changes to the postmortem tissue (Supplementary Fig. 6). Thus, a reduction in C9ORF72 levels induces disease-associated transcriptional changes observed in C9ORF72 patient postmortem samples.

To study the pathogenic mechanism of the C9ORF72 repeat expansion in human motor neurons, we used the forced expression of the transcription factors Ngn2, Isl1, Lhx3, NeuroD1, Brn2, Ascl1, and Myt1l, to convert control and C9ORF72 ALS/FTD patient induced pluripotent stem cells (iPSCs)(for iPSC characterization, see Supplementary Fig. 1 and Supplementary Tables 3, 4) into iMNs (Supplementary Fig. 2a, b) 10,24. Control and patient iMNs labeled with an Hb9::RFP+ lentiviral reporter construct (Supplementary Fig. 2b-d)25 co-expressed spinal motor neuron markers including TUJ1, HB9, and VACHT; were produced at similar rates amongst different iPSC lines; and possessed electrophysiological properties of motor neurons (Supplementary Fig. 2c-i). Depolarizing voltage steps induced currents characteristic of sodium and potassium channels and iMNs fired single or repetitive action potentials (patient - 90%, n=10; control – 100%, n=10)(Supplementary Fig. 2g-i). When co-cultured with primary chick muscle, channel rhodopsin-expressing control and patient iMNs repeatedly induced myotube contraction upon depolarization with green light, indicating they formed neuromuscular junctions and actuated muscle contraction (Supplementary Fig. 2j and Supplementary Videos 1, 2).
The fabrication of composite cathode with boroxine ring for all-solid-polymer lithium cell was described. Composite polymer electrolyte (CPE) was applied between the lithium metal anode and the composite cathode in a coin-shaped cell in order to prepare the solid-polymer electrolyte cell. The CPE films were cast on a flat polytetrafluoroethylene vessel from an acetonitrile slurry containing BaTiO ... [Show full abstract]Read more
Primary chick myoblasts were dissected from D11 chick embryos and plated onto plastic dishes pre-coated with 0.1% gelatin. After 3 days of culture in muscle medium containing F10 (Life Technologies), 10% horse serum, 5% chicken serum (Life Technologies), 0.145 mg/ml CaCl2 (Sigma), and 2% Penicillin/Streptomycin, myoblasts were trypsinized and replated onto iMNs which were at days 15–18 post-transduction. The co-culture was maintained in neuronal medium containing DMEM/F12, 2% B27, 1% GlutaMax and 1% Penicillin/Streptomycin, supplemented with 10ng/ml BDNF, GDNF, and CNTF for 7 days in order to allow neuromuscular junctions to form. Videos were taken using Nikon Eclipse Tis microscope with NIS Element AR software. Light-stimulated contraction shown in Supplementary Figure 2j are representative of contraction observed in 2 biological replicates, with 5 contractile sites per replicate.

The fabrication of composite cathode with boroxine ring for all-solid-polymer lithium cell was described. Composite polymer electrolyte (CPE) was applied between the lithium metal anode and the composite cathode in a coin-shaped cell in order to prepare the solid-polymer electrolyte cell. The CPE films were cast on a flat polytetrafluoroethylene vessel from an acetonitrile slurry containing BaTiO ... [Show full abstract]Read more

Near the cities Beijing, Tianjin, Shijiazhuang, and Jinan, Wuqiao County has many transportation connections. There are many rail and bus services operating in the town. Wuqiao was the first Chinese city to open up its doors to the world under the "Open Door" policy and over many years development, Wuqiao has become a flourishing city with a favorable investment environment.[citation needed]
The tomb murals of the Eastern Wei Dynasty (534–550) in the Southern and Northern Dynasties Period (386–581) unearthed from Xiaomachang Village of Wuqiao County in 1958 depict the performances of handstands, plate spinning, deft horsemanship and so on. However, it was after the Yuan Dynasty (1271–1368) that acrobatics of Wuqiao gained much reputation. Before that, acrobatics in Henan Province was much more influential. After the Yuan Dynasty was established, the capital was moved from Kaifeng of Henan to Beijing, and the acrobatics in Wuqiao of Hebei, which neighbors Beijing, began to prosper and was increasingly influential.
For experiments other than the comparison of Apilimod and the reduced-activity analog, Apilimod was purchased from Axon Medchem (cat. no. 1369). For the reduced-activity analog assays, Apilimod and the reduced activity analog were synthesized at Icagen, Inc. according to the schemes shown in Supplementary Fig. 16. PIKFYVE kinase inhibition was measured using the ADP-Glo kinase assay from SignalChem according to the manufacturer’s instructions, using purified PIKFYVE kinase (SignalChem cat. no. P17–11BG-05).

Previously described Nestin‐Cre+/− C9orf72loxP/loxP mice22 (18 months old) and age-matched controls (n=2 per genotype, 1 male and 1 female for C9orf72−/− and 2 males for C9orf72+/+) were transcardially perfused with phosphate buffered saline (PBS) and subsequently with 4% formaldehyde. Cryoprotection occurred in 30% sucrose. Additionally, 6 month old C9-BAC and wildtype controls were transcardially perfused with phosphate buffered saline (PBS) and subsequently with 4% formaldehyde. Cryoprotection occurred in 20% sucrose. After snap freezing, tissue was sectioned by cryostat at 20 µm thickness and stained with the following primary antibodies: NMDAR1, GluR1, GluR6/7, Lamp1, NeuN, Chat, and GR. Antigen retrieval by sodium citrate occurred prior to GR staining. Images were collected using a Zeiss LSM780 or LSM800 confocal microscope. Glutamate subunit intensity measurements occurred with ImageJ where the mean cytosolic intensity was divided by a background measurement collected near to the measured neuron. Lamp1 and GR quantification occurred with the help of ImageJ. The scientist performing the glutamate receptor subunit intensity, LAMP1 vesicle, and GR quantification was blinded to the genotypes or treatment of the samples.

iMNs from healthy controls and ALS patients were collected on day 21 post-transduction in RIPA buffer (Sigma-Aldrich) with a protease inhibitor cocktail (Roche). Protein quantity was measured by the BCA assay (Pierce) and samples were run on a 10% SDS gel at 4 °C. The gel was transferred onto an Immobilon membrane (Millipore). The membrane was blocked with 5% milk in 0.1% PBS-Tween 20 (PBS-T)(Sigma-Aldrich), incubated with primary antibodies overnight at 4 °C, washed three times with 0.1% PBS-T, then incubated with horseradish peroxidase (HRP)-conjugated (Santa Cruz). After three washes with 0.1% PBS-T, blots were visualized using an Amersham ECL Western Blotting Detection Kit (GE) or the SuperSignal West Femto Maximum Sensitivity Substrate (Thermo) and developed on X-ray film (Genesee). The following primary antibodies were used: rabbit anti-C9ORF72 (Proteintech, cat. no. 22637–1-AP), mouse anti-GAPDH (Santa Cruz, cat. no. sc-32233), chicken anti-MAP2 (Abcam, cat. no. ab11267), mouse anti-FLAG (Sigma, cat. no. F1804), rabbit anti-GLUR1 (Millipore, cat. no. 1504), mouse anti-NR1 (Novus, cat. no. NB300118), mouse anti-Transferrin receptor (Thermo, cat. no. 136800), mouse anti-LAMP3 (DSHB, cat. no. H5C6), rabbit anti-LAMP3 (Proteintech, cat. no. 12632), mouse anti-LAMP2 (DSHB, cat. no. H4B4), mouse anti-LAMP1 (Abcam, cat. no. Ab25630), goat anti-HRP (Santa Cruz, cat. no. sc-47778 HRP), mouse anti-EEA1 (BD Biosciences, cat. no. BD610457), mouse anti-TUJ1 (Biolegend, cat. no. MMS-435P), rabbit anti-APP (Abcam, cat. no. ab32136), mouse anti-Tau5 (Thermo, cat. no. AHB0042), mouse anti-PSD-95 (Thermo, cat. no. MA1–045) , mouse anti-p53 (Cell Signaling, cat. no. 2524S), anti-mouse HRP (Cell Signaling, cat. no. 7076S), anti-rabbit HRP (Cell Signaling, cat. no. 7074S). For C9ORF72 western blots, to generate enough motor neurons for C9ORF72 protein detection, we used a directed differentiation method described previously 28.
Postsynaptic density extraction was done following a protocol published previously 63. Briefly, mouse spinal cord tissue or human cortical tissue was homogenized in cold Sucrose Buffer (320 mM Sucrose, 10 mM HEPES pH 7.4, 2 mM EDTA, 30 mM NaF, 40 mM β-Glycerophosphate, 10 mM Na3VO4, and protease inhibitor cocktail (Roche)) using a tissue grinder and then spun down at 500 g for 6 min at 4℃. The supernatant was re-centrifuged at 10,000 g for 10 min at 4℃. The supernatant was collected as the “Total” fraction, and the pellet was resuspended in cold Triton buffer (50 mM HEPES pH 7.4, 2 mM EDTA, 50 mM NaF, 40 mM β-Glycerophosphate, 10 mM Na3VO4, 1% Triton X-100 and protease inhibitor cocktail (Roche)) and then spun down at 30,000 RPM using a Beckman rotor MLA-130 for 40 min at 4℃. The supernantant was collected as the “Triton” fraction and the pellet was resuspended in DOC buffer (50 mM HEPES pH 9.0, 50 mM NaF, 40 mM β-Glycerophosphate, 10 mM Na3VO4, 20 uM ZnCl2, 1% Sodium Deoxycholate and protease inhibitor cocktail (Roche)) and collected as the “DOC”, PSD-enriched fraction. Collected samples were boiled with SDS-PAGE sample buffer and analyzed by western blot. Purity of the PSD preps was analyzed by immunoblotting for PSD-95 (PSD), p53 (non-PSD), and synaptophysin (non-PSD).
Complementary DNAs (cDNAs) for the iMN factors (Ngn2, Lhx3, Isl1, NeuroD1, Ascl1, Myt1l, and Brn2) and iDA neuron factors (Ascl1, Brn2, Myt1l, Lmx1a, and Foxa2), were purchased from Addgene. cDNA for C9ORF72 was purchased from Thermo Scientific. Each cDNA was cloned into the pMXs retroviral expression vector using Gateway cloning technology (Invitrogen). The Hb9::RFP lentiviral vector was also purchased from Addgene (ID: 37081). Viruses were produced as follows. HEK293 cells were transfected at 80–90% confluency with viral vectors containing genes of interest and viral packaging plasmids (PIK-MLV-gp and pHDM for retrovirus; pPAX2 and VSVG for lentivirus) using polyethylenimine (PEI)(Sigma-Aldrich). The medium was changed 24h after transfection. Viruses were harvested at 48h and 72 h after transfection. Viral supernatants were filtered with 0.45 µM filters, incubated with Lenti-X concentrator (Clontech) for 24 h at 4 ºC, and centrifuged at 1,500 x g at 4ºC for 45 min. The pellets were resuspended in 300 µl DMEM + 10% FBS and stored at −80 ºC.
Immunostaining revealed that C9ORF72+/− and C9ORF72−/− iMNs contained elevated levels of NMDA (NR1) and AMPA (GLUR1) receptors on neurites and dendritic spines compared to control iMNs under basal conditions (Fig. 4a, c, d and Supplementary Fig. 5b and 10a, c-e, g, h, j, k). In addition, control iMNs treated with C9ORF72-specific ASOs displayed increased numbers of NMDA and AMPA receptors in their neurites (Supplementary Fig. 10l, m). C9ORF72 patient iMNs (n=3 patients) also showed elevated NR1 and GLUR1 levels compared to controls (n=3 controls), and forced expression of C9ORF72 isoform B reduced glutamate receptor levels in patient iMNs (n=3 patients) to that of controls (n=3 controls) (Fig. 4a-c and Supplementary Fig. 10a-h). mRNA levels of NR1 (GRIN1) and GLUR1 (GRIA1) were not elevated in flow-purified C9ORF72+/− iMNs, indicating that increased transcription could not explain the increased glutamate receptor levels (Supplementary Fig. 10n).
GCaMP6 was cloned into the pMXs-Dest-WRE retroviral vector and transduced into reprogramming cultures concurrently with the motor neuron factors. To assess GCaMP6 activity, 1.5 μm glutamate was added to iMN cultures and cells were imaged continuously for 2 minutes at 24 frames per second. GFP flashes were scored manually using the video recording. At least 3 different fields of view from three independent cultures, totalling 50–100 iMNs, were scored per condition.
×