To measure the effect of dipeptide repeat protein expression on iMN survival, PR50 and GR50 were cloned into the pHAGE lentiviral vector as fusions with GFP to allow tracking of protein expression. iMN cultures were transduced with PR50 and GR50 lentiviruses at day 17 of reprogramming and longitudinal survival analysis was started the same day. 10 ng/ml of GDNF, BDNF, and CNTF was maintained throughout the experiment, and glutamate treatment was not performed. To measure PR50 turnover, PR50 was cloned into the pHAGE lentiviral vector as a fusion with Dendra2 (Addgene). iPSC-derived fibroblasts were generated according to Daley and colleagues64. Briefly, when C9ORF72−/− iPSC cultures reached 80% confluence, the medium was switched from mTeSR1 (Stem Cell Technologies) to human fibroblast medium containing DMEM (Life Technologies), 10% fetal bovine serum (FBS)(Thermo Fisher Scientific), and 1% penicillin/streptomycin (Life Technologies). Cells were passaged 2 to 3 times using Accutase (Life Technologies) before use in experiments. iPSC-derived fibroblasts were transduced with either pMXs-eGFP or pMXs-C9ORF72 isoform B-T2A-eGFP retrovirus and treated with 10 μg/ml mitomycin C for 3 hrs to inhibit cell proliferation. The cells were then transduced with the PR50–Dendra2 lentivirus and exposed to blue light for 1.5 sec using a lumencor LED light source to initiate photoconversion. The amount of decay (as a fraction of the starting level) of the red fluorescent punctae was monitored by longitudinal time lapse imaging in a Molecular Devices ImageExpress and analyzed using SVCell 2.0 (DRVision Technologies). Fluorescence was quantified at t = 0 and 12 hours after photoconversion. Distinct photoconverted punctae were treated as discrete objects for analysis (n = 20 each for +eGFP and +C9ORF72-T2A-eGFP). For each object, background fluorescence was subtracted and fluorescence was normalized according to object size. The fractional decay was statistically analyzed by two-tailed Student’s t-test. ** - p<.01.
Therapeutic strategies in development for C9ORF72 ALS/FTD target gain-of-function mechanisms. These include ASOs 6–8 and small molecules 13 that disrupt RNA foci formation. However, these approaches have not fully rescued neurodegeneration in human patient-derived neurons 6–8,13, indicating that replacing C9ORF72 function or new therapeutic targets may be required.
Yingxiao Shi,#1,2,3 Shaoyu Lin,#1,2,3 Kim A. Staats,1,2,3 Yichen Li,1,2,3 Wen-Hsuan Chang,1,2,3 Shu-Ting Hung,1,2,3 Eric Hendricks,1,2,3 Gabriel R. Linares,1,2,3 Yaoming Wang,3,4 Esther Y. Son,5 Xinmei Wen,6 Kassandra Kisler,3,4 Brent Wilkinson,3 Louise Menendez,1,2,3 Tohru Sugawara,1,2,3 Phillip Woolwine,1,2,3 Mickey Huang,1,2,3 Michael J. Cowan,1,2,3 Brandon Ge,1,2,3 Nicole Koutsodendris,1,2,3 Kaitlin P. Sandor,1,2,3 Jacob Komberg,1,2,3 Vamshidhar R. Vangoor,7 Ketharini Senthilkumar,7 Valerie Hennes,1,2,3 Carina Seah,1,2,3 Amy R. Nelson,3,4 Tze-Yuan Cheng,8 Shih-Jong J. Lee,8 Paul R. August,9 Jason A. Chen,10 Nicholas Wisniewski,10 Hanson-Smith Victor,10 T. Grant Belgard,10 Alice Zhang,10 Marcelo Coba,3,11 Chris Grunseich,12 Michael E. Ward,12 Leonard H. van den Berg,13 R. Jeroen Pasterkamp,7 Davide Trotti,6 Berislav V. Zlokovic,3,4 and Justin K. Ichida1,2,3,†

To measure the effect of dipeptide repeat protein expression on iMN survival, PR50 and GR50 were cloned into the pHAGE lentiviral vector as fusions with GFP to allow tracking of protein expression. iMN cultures were transduced with PR50 and GR50 lentiviruses at day 17 of reprogramming and longitudinal survival analysis was started the same day. 10 ng/ml of GDNF, BDNF, and CNTF was maintained throughout the experiment, and glutamate treatment was not performed. To measure PR50 turnover, PR50 was cloned into the pHAGE lentiviral vector as a fusion with Dendra2 (Addgene). iPSC-derived fibroblasts were generated according to Daley and colleagues64. Briefly, when C9ORF72−/− iPSC cultures reached 80% confluence, the medium was switched from mTeSR1 (Stem Cell Technologies) to human fibroblast medium containing DMEM (Life Technologies), 10% fetal bovine serum (FBS)(Thermo Fisher Scientific), and 1% penicillin/streptomycin (Life Technologies). Cells were passaged 2 to 3 times using Accutase (Life Technologies) before use in experiments. iPSC-derived fibroblasts were transduced with either pMXs-eGFP or pMXs-C9ORF72 isoform B-T2A-eGFP retrovirus and treated with 10 μg/ml mitomycin C for 3 hrs to inhibit cell proliferation. The cells were then transduced with the PR50–Dendra2 lentivirus and exposed to blue light for 1.5 sec using a lumencor LED light source to initiate photoconversion. The amount of decay (as a fraction of the starting level) of the red fluorescent punctae was monitored by longitudinal time lapse imaging in a Molecular Devices ImageExpress and analyzed using SVCell 2.0 (DRVision Technologies). Fluorescence was quantified at t = 0 and 12 hours after photoconversion. Distinct photoconverted punctae were treated as discrete objects for analysis (n = 20 each for +eGFP and +C9ORF72-T2A-eGFP). For each object, background fluorescence was subtracted and fluorescence was normalized according to object size. The fractional decay was statistically analyzed by two-tailed Student’s t-test. ** - p<.01.
To measure the effect of C9ORF72 activity on endogenous DPR levels in human motor neurons, we quantified endogenous PR+ puncta in C9-ALS iMNs with or without C9ORF72 overexpression. Using a validated anti-PR antibody 10,50, we found that the majority of PR+ punctae were localized in the nucleus (Fig. 5f), although we also detected cytoplasmic PR+ punctae to a larger extent than we had previously observed with exogenous PR(50) 10. C9-ALS iMNs (n=2 patients) had higher levels of nuclear PR+ puncta than controls (n=2 controls)(Fig. 5f, g) and overexpression of C9ORF72 isoform B significantly reduced the number of PR+ puncta in C9-ALS iMNs (Fig. 5f, h).
To verify that PIKFYVE-dependent modulation of vesicle trafficking was responsible for rescuing C9ORF72 patient iMN survival, we tested the ability of a constitutively active RAB5 mutant to block C9ORF72 patient iMN degeneration. Active RAB5 recruits PI3-kinase to synthesize PI3P from PI and therefore, like PIKFYVE inhibition, increases PI3P levels 56. Constitutively active RAB5 did not improve control iMN survival (n=2 controls)(Supplementary Fig. 15k), but successfully rescued C9ORF72 patient iMN survival (n=3 patients)(Supplementary Fig. 15l). In constrast, dominant negative RAB5, wild-type RAB5, or constitutively active RAB7 did not rescue C9ORF72 patient iMN survival (n=1, 3, 3 patients, respectively)(Supplementary Fig. 14m-o).

Wuqiao County (simplified Chinese: 吴桥县; traditional Chinese: 吳橋縣; pinyin: Wúqiáo Xiàn, literally "Wu Bridge") is a county of southeastern Hebei province, China, bordering Shandong province to the southeast. It is the southernmost county-level division of the prefecture-level city of Cangzhou. Wuqiao covers an area of 583 km2 (225 sq mi) with a population of 280,000 and 444 natural villages under its jurisdiction. Over a period of more than 1500 years, Wuqiao is an old county with a vivid and rich history and culture. Wuqiao is situated in the center of the Huabei Plains and has a pleasant climate most of the year round and it is possible to pleasurably visit here at almost any time of the year.[citation needed]


To determine if C9ORF72 iMNs recapitulate neurodegenerative ALS processes, we examined their survival by performing longitudinal tracking of Hb9::RFP+ iMNs (Fig. 1a). This approach enabled us to distinguish differences in neurogenesis from differences in survival, which could not be addressed using previously-reported cross-sectional analyses6,7,10,26. In basal neuronal medium supplemented with neurotrophic factors, control and C9ORF72 patient iMNs survived equally well (Fig. 1b, Supplementary Fig. 3a, Supplementary Tables 5, 6). As human C9ORF72 ALS patients have elevated glutamate levels in their cerebrospinal fluid (possibly triggered by DPR-mediated aberrant splicing of the astrocytic excitatory amino acid transporter 2 EAAT2 4,27) we stimulated iMN cultures with a high glutamate pulse (12-hour treatment, 10 μM glutamate). This initiated a robust degenerative response in patient, but not control, iMNs (Fig. 1c-e and Supplementary Videos 3, 4) that was consistent across lines from multiple patients (n=6 patients) and controls (n=4 controls)(Fig. 1c, d and Supplementary Fig. 3d, e). While iMN survival varied slightly between live imaging systems, or between independent experiments due to the lengthy time course of neurodegeneration, the relative difference between control and C9-ALS patient iMNs was consistent (Fig. 1c - Nikon Biostation CT and Supplementary Fig. 3b - Molecular Devices ImageExpress). Moreover, iMNs from different iPSC lines derived from the same donor behaved similarly, suggesting genotypic differences accounted for these effects (Supplementary Fig. 3c). Treatment with glutamate receptor antagonists during glutamate administration prevented patient iMN degeneration (Fig. 1f). Alternatively, withdrawal of neurotrophic factors without glutamate stimulation also caused rapid degeneration of patient iMNs (n=3 patients, (Fig. 1g and Supplementary Fig. 3f).

Base text for this translation. ___. Wang Meng’ou’s , ed. Tangren xiaoshuo jiaoshi . Taipei: Zhongzheng Shuju, 1983, 2319-38. For other texts and editions see footnote 1. Translations Birch, Cyril. “The Curly-bearded Hero,” in Anthology of Chinese Literature, v. 1, New York, 1965, pp. 314-322. Chai, Ch’u, and Winberg Chai. “The Curly-Bearded Guest,” in A Treasury of Chinese Literature, New York, 1965, pp. 117-124. Hsu Sung-nien. “Biographie d’un preux barbu,” Anthologie de la littérature chinoise.Paris: Delagrave, 1933, pp. 241-6. Levenson, Christopher, tran., The Golden Casket. Harmondsworth, Middlesex: Penguin Books, 1967, pp. 137-47. Lévy, André. “Barbe-bouclée, L’étranger à la barbe et aux favoris bouclés,” in Histoires extraordinaires et récits fantastiques de la Chine ancienne.Paris: Flammarion, 1993, pp. 177-195 (with notes). Lin Yutang. “Curly-Beard,” in Famous Chinese Short Stories. New York: John Day (Cardinal), 1953, pp. 3-22. Schafer, E.H. “Three Divine Women of South China,” CLEAR, 1 (1979), pp. 31-42. Wang, Elizabeth Te-chen, tran. “The Curly-Bearded Guest,” in Wang’s Ladies of the Tang: 22 Classical Chinese Stories. Taipei: Mei Ya Publications, 1973, pp. 133-50.
To measure the effect of dipeptide repeat protein expression on iMN survival, PR50 and GR50 were cloned into the pHAGE lentiviral vector as fusions with GFP to allow tracking of protein expression. iMN cultures were transduced with PR50 and GR50 lentiviruses at day 17 of reprogramming and longitudinal survival analysis was started the same day. 10 ng/ml of GDNF, BDNF, and CNTF was maintained throughout the experiment, and glutamate treatment was not performed. To measure PR50 turnover, PR50 was cloned into the pHAGE lentiviral vector as a fusion with Dendra2 (Addgene). iPSC-derived fibroblasts were generated according to Daley and colleagues64. Briefly, when C9ORF72−/− iPSC cultures reached 80% confluence, the medium was switched from mTeSR1 (Stem Cell Technologies) to human fibroblast medium containing DMEM (Life Technologies), 10% fetal bovine serum (FBS)(Thermo Fisher Scientific), and 1% penicillin/streptomycin (Life Technologies). Cells were passaged 2 to 3 times using Accutase (Life Technologies) before use in experiments. iPSC-derived fibroblasts were transduced with either pMXs-eGFP or pMXs-C9ORF72 isoform B-T2A-eGFP retrovirus and treated with 10 μg/ml mitomycin C for 3 hrs to inhibit cell proliferation. The cells were then transduced with the PR50–Dendra2 lentivirus and exposed to blue light for 1.5 sec using a lumencor LED light source to initiate photoconversion. The amount of decay (as a fraction of the starting level) of the red fluorescent punctae was monitored by longitudinal time lapse imaging in a Molecular Devices ImageExpress and analyzed using SVCell 2.0 (DRVision Technologies). Fluorescence was quantified at t = 0 and 12 hours after photoconversion. Distinct photoconverted punctae were treated as discrete objects for analysis (n = 20 each for +eGFP and +C9ORF72-T2A-eGFP). For each object, background fluorescence was subtracted and fluorescence was normalized according to object size. The fractional decay was statistically analyzed by two-tailed Student’s t-test. ** - p<.01.
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).

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.
Eliminating C9ORF72 protein expression from one or both alleles reduced iMN survival to levels comparable to patient iMNs (Fig. 2f). Antisense oligonucleotide (ASO)-mediated suppression of C9ORF72 expression levels also reduced control iMN survival (Fig. 2g and Supplementary Fig. 4j), suggesting that reduced iMN survival was not due to an off-target effect of the CRISPR/Cas9 genome editing. Exogenously restoring C9ORF72 expression in C9ORF72+/− and C9ORF72−/− iMNs rescued survival (Supplementary Fig. 4k, l), verifying that depletion of C9ORF72 caused the observed neurodegeneration.
Amongst four reproducible hit compounds, we identified a PIKFYVE kinase inhibitor (YM201636) that significantly increased C9ORF72 patient iMN survival (n=2 patients) (Fig. 6b, c and Supplementary Fig. 15a). PIKFYVE is a lipid kinase that converts phosphatidylinositol 3-phosphate (PI3P) into phosphtidylinositol (3,5)-bisphosphate (PI(3,5)P2)51(Fig. 6f). PI3P is primarily generated by PI3-kinases recruited to early endosomes by RAB5, and PI3P anchors EEA1 to early endosomes to drive endosomal maturation 52(Fig 6f). Following endosomal maturation into lysosomes, PI3P drives fusion of lysosomes with autophagosomes 53. PIKFYVE regulates PI3P levels by converting PI3P into PI(3,5)P2 52, which disfavors lysosomal fusion with endosomes and autophagosomes 53,54. Therefore, inhibition of PIKFYVEincreases autophagosome-lysosome fusion 53 and may compensate for reduced C9ORF72 activity and other disease processes by increasing PI3P levels to facilitate removal of glutamate receptors or DPRs (Fig. 6f). Interestingly, FIG4 is a phosphatase that opposes PIKFYVE kinase by converting PI(3,5)P2 to PI3P and loss-of-function mutations in FIG4 cause ALS 55. Thus, genetic evidence suggests that PIKFYVE inhibition may be capable of modulating ALS disease processes in humans.
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
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