EMBO/SourceData huggingface dataset:
Figure 4 (A, B) Longitudinal intraindividual stability of NfL (A) and pNfH (B) serum levels over 6 weeks, assessed in both ataxic (red) and preataxic (green) SCA3 and control (blue) subjects (n=21). Data of the same individuals are linked by lines. ICC, intraclass correlation coefficient (estimate and 95% CI). (C) Sample size estimations were performed for future intervention trials using the reduction of Nf levels towards control levels as outcome measure. The estimated number of subjects per study arm is plotted over the assumed therapeutic effect for lowering the Nf level in SCA3 subjects to levels observed in healthy controls (NfL: dashed line, pNfH: dotted line).
Figure 5(A-B) Plasma concentrations of NfL (A) and pNfH (B) were measured in the 304Q knock-in SCA3 mouse model. Heterozygous animals become symptomatic at ≈8 months of age.(C-F) Tissue levels of soluble and aggregated mutant ataxin-3 were measured in cerebellum (C, E) and frontal lobe (D, F).
Figure 6 The figure shows the degree to which each variable differs between heterozygous SCA3 mice and wildtype controls for a given age. For each variable, we quantified the deviation of hetero­zygous mice from controls of the same age by calculating the effect size r of the group comparison (independent t-tests). An effect size of 0 indicates that the value in heterozygous mice is not different from controls, while an effect size of 1 would indicate strong abnormality. Note that the drop in the effect size of Nf levels from 12 months to 18 months thus does not imply a putative reduction of Nf levels, but rather the loss of the effect in mutants relative to controls, as controls show strong age-related Nf increases at 18 months of age. Negative effect size values were set to 0.
Figure 7 (A) We assessed samples of cerebellar cortex, deep cerebellar nuclei, frontal cortex, pons and pyramidal tract by immunohistochemistry with ataxin-3 staining, comparing heterozygous 304Q SCA3 mice at 2, 6, 12 and 18 months of age with wildtype animals at 18 months. ML: molecular layer, PC: Purkinje cells, GL: granular layer, scale bars: 20 µm.  (B) We histologically assessed the number and integrity of Purkinje cells in the cerebellar cortex by NfL, pNfH, Nissl and calbindin staining, comparing heterozygous 304Q SCA3 mice at 2, 6, 12 and 18 months of age with wildtype animals. ML: molecular layer, PC: Purkinje cells, GL: granular layer, scale bars: 20 µm.
Figure 1.Select 2D class averages of the particles that were used to calculate the 2019-nCoV S reconstruction (left). Side and top views of the prefusion structure of the 2019-nCoV S protein with a single RBD in the "up" conformation (right). The two RBD "down" protomers are shown as cryo-EM density in either white or gray and the RBD "up" protomer is shown in ribbons, colored corresponding to the schematic in Fig 1A.
Figure 3.SPR sensorgram showing the binding kinetics for human ACE2 and immobilized 2019-nCoV S. Data are shown as black lines and the best fit of the data to a 1:1 binding model is shown in red.Negative-stain EM 2D class averages of 2019-nCoV S bound by ACE2. Averages have been rotated so that ACE2 is positioned above the 2019-nCoV S protein with respect to the viral membrane. A cartoon depicting the ACE2-bound 2019-nCoV S protein is shown (right) with ACE2 in blue and S protein monomers colored tan, pink and green.
Figure 4.A biolayer interferometry sensorgram that shows binding to ACE2 by the 2019-nCoV RBD-SD1. Binding data are shown as a black line and the best fit of the data to a 1:1 binding model is shown in red.Biolayer interferometry to measure cross-reactivity of the SARS-CoV RBD-directed antibodies S230, m396 and 80R. Sensortips with immobilized antibodies were dipped into wells containing 2019-nCoV RBD-SD1 and the resulting data are shown as a black line.
Figure 1(E). Relative luciferase activity of the sensor (+) reporter or sensor (-) reporter induced by expression vectors of the top 5 genes identified in the screen or the GFP vector in HEK293-FT cells. Error bars show SD; n=3. Significance was assessed using 2‐tailed Student's t‐test, < 0.05*.(F). Heat map of relative miRNA expression of various miRNAs in HEK-293FT cells transfected with expression vectors of the top 5 genes from the screen, or the ctrl (GFP) vector. Red color represents suppressed expression compared with ctrl (GFP). n=3.
Figure 2(A). Volcano plot of TaqMan array showing the mean average expression and p-value of miRNA expression profiles between TruB1 KD and ctrl (scramble). N=3. Significance was assessed using 2‐tailed Student's t‐test. MiRNAs suppressed (Relative expression TruB1 KD / ctrl <0.8 and p-value < 0.1) are enclosed by the red square.(D). Relative expression of let-7 family miRNAs and other miRNAs in HEK293FT cells with TruB1 KD or ctrl (siRNA) determined by qRT-PCR. Significance was assessed using 2‐tailed Student's t‐test, < 0.05*. Data information: All experiments were performed in triplicate. Error bars show SD.(E). Relative expression of primary-let-7 family miRNAs as in (D) determined by qRT-PCR. Significance was assessed using 2‐tailed Student's t‐test, < 0.05*. Data information: All experiments were performed in triplicate. Error bars show SD.
Figure 3(C). Relative miRNA expression of let-7a in HEK-293 cells infected with tetracycline-inducible expressing lentiviruses for TruB1, mt1, mt2 or GFP 5 days after doxycycline treatment, as determined by qRT-PCR. Significance was assessed using 2‐tailed Student's t‐test, < 0.05*. Data information: All experiments were performed in triplicate. Error bars show SD.(D). Northern blotting for let-7a and RNU6B in HeLa cells infected with lentiviruses encoding tetracycline-inducible expression of TruB1, mt1, mt2, or GFP, 5 days after doxycycline treatment.(G). Location of pseudouridine sites detected by the CMC primer extension method. Total RNA purified from HEK-293FT cells were treated with CMC. CMC treated RNA were reverse-transcribed with RI-labelled specific primers for tRNAphe or pri-let-7b. ddATP was used for sequence control. Pseudouridines are indicated by black arrows.
Figure 4(A). RIP analysis of pri-let-7a1 and Flag-TruB1 from HEK-293FT cells. RNA was extracted from IP material and analyzed by qRT-PCR. HEK-293FT cells were infected with lentiviruses encoding tetracycline-inducible expression of TruB1, mt1, mt2, or GFP and treated with doxycycline. Error bars show SD; n=3. Significance was assessed using 2‐tailed Student's t‐test, < 0.05*.(B). EMSA of 32p-ATP-labelled pri-let-7a1 or pri-let-7a1 loop mt mixed with recombinant TruB1, mt1 or mt2 at several doses. RNP: Ribonucleoprotein complexes.(E). Tag densities represented as dots. Density of miRNA clusters in HITS-CLIP were normalized by miRNA expression as determined by TaqMan array.
Figure 5(A). In vitro processing assay for RI-labelled pri-let-7a1. Autoradiographs of gels showing pri-let-7a1 treated with whole cell lysate (WCL) from HEK-293FT cells transfected with GFP, TruB1, mt1, or mt2 (overexpression, left), and TruB1 KD or ctrl (siRNA, right). Dicer KD was used to show the height of pre-let-7a1. (B) RI intensities of (A) were quantified and normalized to ctrl. Relative processing rate of pri-let-7a1 into pre- and mature- are shown. Significance was assessed using 2‐tailed Student's t‐test, < 0.05*. Data information: All experiments were performed in triplicate. Error bars show SD.(C). RIP assay of pri-let-7a1 and DGCR8 from HEK-293FT cells. Western blotting for input or immunoprecipitate (IP) using anti-DGCR8 antibody and anti-actin antibody are shown on top. RNA was extracted from IP material and analyzed by qRT-PCR (bottom). Significance was assessed using 2‐tailed Student's t‐test, < 0.05*. (D). RIP assay of pri-let-7a1 and Flag-tagged TruB1 from HEK-293FT cells with Lin28B KD or ctrl (siRNA). Western blotting for input or IP material using anti-Flag antibody, anti-Lin28B antibody, and anti-actin antibody are shown on top. RNA was extracted from IP material and analyzed by qRT-PCR (bottom). Significance was assessed using 2‐tailed Student's t‐test, < 0.05*. Data information: All experiments were performed in triplicate. Error bars show
Figure 6(B). Relative luciferase activity of KRAS reporter or Ctrl (empty) reporter in HEK293FT cells infected with lentiviruses expressing tetracycline-inducible TruB1, mt1, mt2, or GFP 5 days after doxycycline treatment. Significance was assessed using 2‐tailed Student's t‐test, < 0.05*. Data information: All experiments were performed in triplicate. Error bars show SD.(D). Relative expression of let-7 families determined by qRT-PCR in HEK-293FT cells with KD of let-7 family members or ctrl (using 2'-O-methylated antisense inhibitor). Significance was assessed using 2‐tailed Student's t‐test, < 0.05*. Data information: All experiments were performed in triplicate. Error bars show SD.(E). Real-time glo assay for HEK293FT cells infected with lentiviruses expressing tetracycline-inducible TruB1 or GFP, 5 days after doxycycline treatment, with or without KD of let-7 family members. GFP: GFP without let-7 KD. WT: overexpression of wild type TruB1 without let-7 KD. WT + let7 KD: WT: overexpression of wild type TruB1 with let-7 KD. GFP + let-7KD: GFP with let-7 KD. Significance was assessed using 2‐tailed Student's t‐test, < 0.05*.
Figure 1Gating strategy for sorting of EpCAMhighCD24lowSca‑1+ cells and rMC from lung homogenate of adult mice.Time-course of epithelial stem/progenitor cell proliferation and differentiation within BALO at days 8, 11 and 21 of co-culture with rMC.Clonal expansion of EpCAMhighCD24lowSca‑1+ cells derived from either GFP-expressing mice or tdTomato-expressing ROSAmT/mG mice at day 21 of co‑culture.Percentages of SCGB1A1+SFTPC+ (BALO), SCGB1A1+SFTPC- (bronchiolospheres) and SCGB1A1-SFTPC+ (alveolospheres) organoids per well at day 21 of culture derived from EpCAMhighCD24lowSca-1+ cells isolated from Scgb1a1mCherrySftpcYFP reporter mice (n=4 biological replicates).Representative confocal images of days 8 to 21 of culture showing endogenous SCGB1A1 and SFTPC expression during BALO formation derived from EpCAMhighCD24lowSca-1+SCGB1A1+SFTPC+ cells isolated from Scgb1a1mCherrySftpcYFP reporter mice.Heat map (left) and tSNE plot (right) (F) of digested day 21 BALO cultures depicting four distinct clusters (C1, airway, blue; C2, alveolar, purple; C3, MYO, orange, and C4, LIF, green).Violin plots of selected genes representing airway associated-genes (G) (Itgb4, Trp63, Krt7, and Sox2) and alveoli associated‑genes (H) (Cxcl15, Lyz2, Sftpc, and Hopx). Each violin plot shows the frequency distribution of the mean transcript level (log2).
Figure 2mRNA expression analysis of epithelial cell differentiation markers Sftpc (AEC II), Hopx (AEC I), Foxj1 (ciliated cells), Muc5ac (secretory cells) and p63 (basal cells) in BALO at days 0, 10, and 21 of culture (n=3 biological replicates with pooled cells from 4 cultures per replicate)Electron microscopy of BALO alveoli showing two cuboidal epithelial cells (AEC II) connected by tight junctions (red square) with numerous mitochondria (M) and lamellar bodies (LB). A LIF with numerous lipid droplets (*) and a MYO with cisterns of rough ER (red arrow) are located at the basal side (left). The alveolar lumen is filled with lamellar surfactant including tubular myelin (white arrow) (lower right). Exocytosis of a lamellar body (*) from an AEC II (upper right). Scale bars indicate 500 nm.Electron microscopy of bronchiolar-like airway depicting columnar ciliated cells (red arrowhead) with basal bodies (black arrowhead) at the left side of the longitudinally sectioned lumen. The boxed area indicates an apical junctional complex between two ciliated cells. 1 = tight junction, 2 = adherens junction. Scale bar indicates 500 nm (in insert: 100 nm).Staining of lamellar bodies in BALO with RFP LysoTracker. Scale bars represent 100 μm.Western blot analysis of the surfactant proteins: pro-SPC, mature SPC, pro-SPB, mature SPB, and SPA in lung homogenate (LH), AEC and day 21 BALO (n=3 biological replicates).F-G. Alveolar diameter (F) and number of alveoli (G) in BALO at days 15, 21, 30 and 40 of culture was measured from n=5 BALO in n=3 biological replicates with tdTomato+ rMC.H-I. Representative scheme and images of day 40 BALO alveoli (H) and airway (I). BALO alveolar-like structures (H) are shown (h') (red arrowheads) in semithin section (0.5 µm) stained with Toluidine blue. Scale bar indicates 100 μm (left). Electron microscopy showing AEC I (h'') ultrastructure within BALO. Scale bars indicate 2500 nm (center) and 1000 nm (right). An airway-like structure (i') is shown with secretory and ciliated cells (red arrowheads) in semithin sections (0.5 µm) longitudinally cut and stained with Toluidine blue. Scale bar indicates 50 μm (far left). Electron microscopy of a bronchiolar-like airway (I) depicting pseudostratified epithelium (i'') with a basal-like cell (BC), not reaching the lumen in which cilia (C) are seen, located between a secretory (SC) and a ciliated cell (Ci). Scale bars indicate 1000 nm (left and right). Mature cilia (i''') in BALO at higher magnification depicting the 9x2+2 structure with central doubled microtubules (insert, red arrowhead), a characteristic for motile cilia. Scale bar indicates 100 nm (far right).
Figure 3Representative images of day 21 BALO and tdTomato+ rMC stained with LipidTOX (green). Scale bar represents 100 μm.Fluorescence images of αSMA (green) and neutral lipids (LipidTOX red) staining in WT‑derived rMC and BALO (dotted lines indicate single BALO or insert) at day 21 of culture. Scale bars represent 50 μm (left) and 25 μm (right).Representative flow cytometric dot plots and histograms of PDGFRα expression in rMC (EpCAM-CD45-CD31-Sca-1+) isolated from the lung homogenate of PdgfraGFP reporter mice.Representative images of BALO formation at day 8, 15 and 21 of co-culture. WT BASC were co‑cultivated with sorted rMC (total PDGFRα+ population) or rMC expressing either low or high levels of PDGFRα‑GFP. Scale bars represent 100 μm.tSNE plots and violin plots depicting selected genes representing MYO (Pdgfrα, Tagln, Acta2, Eln, and Axin2) (top panels) and LIF associated-genes (Fgf10, Apoe, Serpina3n, Gsn, and Gas6) (bottom panels). Each violin plot shows the frequency distribution of the mean transcript level (log2). C3 (MYO, orange) and C4 (LIF, green) refer to the scRNA-Seq experiment in Fig. 1G.Fluorescence image of αSMA+PDGFRαhigh MYO (yellow arrows) and LipidTOX+PDGFRαlow LIF (red arrows) from sorted PDGFRα-GFP rMC after 21 days of BALO culture. Scale bars represent 50 μm (left) and 25 μm (right).Fluorescence image containing PDGFRαhigh MYO from sorted PDGFRα-GFP rMC within BALO derived from tdTomato+ mice at day 21 of culture. Scale bars represent 100 μm (left) and 50 μm (right).
Figure 5Representative images of E11.5 lung explants after treatment for 48 h with 100 μM Scra or mo142-3p reveals reduced size and branching morphogenesis after miR142-3p knockdown.Organoid diameter (n=30-50 per group) in µm before addition of 4 μM Scra or mo142-3p at day 6 (control) and 5 days after treatment (at day 11 BALO culture) in n=3 biological replicatesRepresentative images of β-galactosidase staining in TOPGAL epithelium (C) BALO cultures before (day 6, control) or 5 days after treatment with either 4 μM Scra or mo142-3p (day 11 of co-culture). BASC and rMC were isolated form the lung homogenate of TOPGAL mice. β-galactosidase+ rMC at day 11 of culture are indicated with arrows.Representative images of β-galactosidase staining in TOPGAL rMC (D) BALO cultures before (day 6, control) or 5 days after treatment with either 4 μM Scra or mo142-3p (day 11 of co-culture). BASC and rMC were isolated form the lung homogenate of TOPGAL mice. β-galactosidase+ rMC at day 11 of culture are indicated with arrows.Representative transmission and confocal images after LysoTracker staining indicating branching and number of branching points in n=4 BALO 15 days after treatment with 4 μM Scra or mo142-3p (day 21 of co-culture) in n=3 biological replicates.mRNA levels of epithelial and mesenchymal miR142-3p expression in Scra and mo142-3p-treated organoids 5 days after treatment (n=3-4 biological replicates with pooled cells from 4 cultures per replicate).
Figure 1Representative sections of WT and MPSIIIA brains at 9 months of age stained for astrocytes (GFAP) or microglia (isolectin B4, ILB4). Images correspond to high power views covering cortical layers II-V. Scale bar, 100 μm. (n=4 mice per group).Quantitative PCR for various inflammatory cytokines in whole brains from 9 month old WT and MPSIIIA mice. Symbols above bars are versus WT. (n=6 mice per group). Data are expressed as mean ± STDEV, data for each cytokine were tested by unpaired t-test; *P<0.05, **P<0.01, ***P<0.001. Symbols above bars are versus WT.Quantification of IL-1β and IL-1Ra levels in plasma from human healthy control and MPSIII patients (n=6 control participants and n=21 MPSIII patients). Data are expressed as mean ± STDEV and were tested by unpaired t-test. C. IL-1β, control vs. MPSIII P=0.0407; D. IL-1Ra, control vs. MPSIII P=0.0001. Quantification of IL-1β and IL-1Ra levels in cerebrospinal fluid (CSF) from control and MPSIII patients (n=3 control participants and n=21 MPSIII patients). Data are expressed as mean ± STDEV and were tested by unpaired t-test; *P<0.05. F. IL-1Ra, control vs. MPSIII P=0.0167.
Figure 2The expression of Il1b was measured in whole brain using quantitative PCR 1 hour, 2 hours and 6 hours after I.P. challenge (n=6 mice per group). Data are expressed as mean ± STDEV and were tested by two-way ANOVA with Bonferroni's post-test; *P<0.05, **P<0.01, ***P<0.001. Symbols above bars are versus PBS at the relevant time-point.Quantification of intracellular production of IL-1β (n=3 independent experiments each with 3 inter-experimental replicates). Data are expressed as mean ± STDEV and were tested by one-way ANOVA with Tukey's post-test; ***P<0.001. Symbols above bars are versus PBS. Quantification of IL-1β secreted into the media (n=3 independent experiments each with 3 inter-experimental replicates). A horizontal dotted line represents the limit of detection of the ELISA. Data are expressed as mean ± STDEV and were tested by one-way ANOVA with Tukey's post-test; **P<0.01, ***P<0.001. Symbols above bars are versus PBS.WT mixed glial cultures were co-treated with MPSIIIA GAG (4 μg/ml) and/or the TLR4 inhibitor CLI-095 (1 μg/ml) for 24 hours. The intracellular production of IL-1β was measured (n=3 independent experiments each with 3 inter-experimental replicates). Data are expressed as mean ± STDEV and were tested by one-way ANOVA with Tukey's post-test; ***P<0.001. Symbols above bars are versus MPSIIIA GAG + vehicle.Multi-heparinase (HepM) and/or chondroitinase ABC (cABC) digests were performed on MPSIIIA GAG, and the resulting oligosaccharides applied to a WT mixed glial culture for 24 hours alongside heparin, bovine HS (bHS), porcine DS (pDS) and WT GAG. The intracellular production of IL-1β was measured (n=3 independent experiments each with 3 inter-experimental replicates). Data are expressed as mean ± STDEV and were tested by one-way ANOVA with Tukey's post-test; *P<0.05, ***P<0.001. Symbols above bars are versus MPSIIIA GAG alone.MPSIIIA GAG was 2-O-desulphated (hashed bars) utilising 120 mM NaOH, and compositional HS disaccharide analysis performed via RP-HPLC against untreated MPSIIIA GAG (black bars) to validate complete 2-O-desulphation. Percentage contribution of each modification were determined (n=3 GAG samples). Data are expressed as mean ± STDEV and were tested by two-way ANOVA with Bonferroni's post-test; 2S MPSIIIA GAG vs. 2S 2-ODS MPSIIIA GAG P<0.0001. NS, N-sulphated glucosamine; 2S, 2-O-sulphate group; 6S, 6-O sulphate group.MPSIIIA GAG was 2-O-desulphated and the resulting oligosaccharides applied to a WT mixed glial culture for 24 hours. The intracellular production of IL-1β was measured (n=3 independent experiments each with 3 inter-experimental replicates). Data are expressed as mean ± STDEV and were tested by one-way ANOVA with Tukey's post-test; MPSIIIA GAG vs. 2ODS MPSIIIA GAG P<0.0001. 2ODS, 2-O-desulphated.
Figure 3Representative sections from 9 month old WT and MPSIIIA brains showing secondary storage of GM2 ganglioside, cholesterol, protein aggregates and amyloid beta peptide 1-40 and 1-42 within cortical layers II to V/VI, x20, scale bar: 50 μm. Inserts, 100x, scale bar: 10μm. (n=4 mice per group)ATP levels in whole brain homogenate from 9 month old WT and MPSIIIA mice (n=6 mice per group). Data are expressed as mean ± STDEV and were tested by unpaired t-test. WT vs. MPSIIIA P<0.02Brain transcription of mRNA species for various inflammasome components (n=6 mice per group). Data are expressed as mean ± STDEV, data for each cytokine were tested by unpaired t-test; *P<0.05, **P<0.01, ***P<0.001. Symbols above bars are versus WTCaspase 1 activity levels in whole brain homogenate from WT and MPSIIIA mice (n=6 mice per group). Data are expressed as mean ± STDEV and were tested by unpaired t-test. WT vs. MPSIIIA P<0.0001WT (E-G) and Nlrp3-/- (H-J) mixed glia were primed with MPSIIIA GAG or LPS. ATP (5 mM), cholesterol crystals (1 mg/ml) or amyloid-β fibrils (Aβ1-40 4.3 μM and Aβ1-42 5 μM) were added 4 hours post-priming stimulus, and the secretion of IL-1β into the media measured via ELISA after a further 20 hours (n=3 independent experiments each with 3 inter-experimental replicates). Data are expressed as mean ± STDEV and were tested by one-way ANOVA with Tukey's post-test; *P<0.05, ***P<0.001
Figure 4The biological activity of LV-mediated IL-1Ra was assessed in vitro. RAW264.7 macrophages were transduced with LV.IL1RN or LV.GFP vectors at a MOI of 10. After 72 hours cells were stimulated with recombinant hIL-1β and the expression of TNF-α assessed after a further 48 hours. (n=3 independent experiments each with 3 inter-experimental replicates). Data are expressed as mean ± STDEV and were tested by two-way ANOVA with Bonferroni's post-test; *P<0.05, **P<0.01, ***P<0.001. Symbols above bars are versus NTC within a treatment group.A portion of transduced HSCs were plated into CFU assays, incubated for 12 days and CFU colonies analysed. Vector copy number were quantified (n=6 CFU assays).A portion of transduced HSCs were plated into CFU assays, incubated for 12 days and CFU colonies analysed. protein production of secreted human IL-1Ra were quantified (n=6 CFU assays).A portion of transduced HSCs were plated into CFU assays, incubated for 12 days and CFU colonies analysed. intracellular human IL-1Ra were quantified (n=6 CFU assays).Donor chimerism was determined by flow cytometry at 4 months of age (2 months post-transplant) (n=10 mice).based on peripheral blood composition was determined by flow cytometry at 4 months of age (2 months post-transplant) (n=10 mice).Human IL-1Ra expression was quantified in the plasma of mice at 6 months of age (4 months post-transplant) (n=10 mice per group). Data are expressed as mean ± STDEV and were tested by one-way ANOVA with Tukey's post-test; WT vs. LV.IL1RN P<0.0001; MPSIIIA vs. LV.IL1RN P<0.0001. Symbols above bars are versus WT.Vector copy number was evaluated in brain, spleen, liver, white blood cells (WBC) and bone marrow (BM) of mice at 6 months of age (4 months post-transplant) (n=10 mice per group).Quantification of human IL-1Ra levels in the brain of transplanted MPSIIIA mice (n=10 mice per group). Data are expressed as mean ± STDEV and were tested by one-way ANOVA with Tukey's post-test; WT vs. LV.IL1RN P<0.0001; MPSIIIA vs. LV.IL1RN P<0.0001. Symbols above bars are versus WT.Representative sections from 6-month old MPSIIIA and LV.IL1RN transplanted MPSIIIA mice. Sections show the CA3 region of the hippocampus. Cells expressing high levels of human IL-1Ra are indicated with black arrows. 40x, scale bar, 50 μm (n=4 mice per group).