Journal: Cell Reports Medicine
Article Title: Analysis of GRK2 aggregation in the pathology of Alzheimer disease in animal models
doi: 10.1016/j.xcrm.2026.102707
Figure Lengend Snippet: GRK2 function modulation counteracts dysfunctional phospho-S670-GRK2 aggregation and retards AD progression and mortality in mice (A and B) Immunoblot of hippocampal, cytosolic GRK2 (A, left) and p-S670-GRK2 (A, right) of 18-month-old, untreated (18 mo), CPD10-treated (18mo + CPD10; 8 mg/kg/d), and 12-month-old, untreated (12 mo) Tg2576 mice. The control blot detects ADSL. Data are mean ± SD; n = 4 mice; one-way ANOVA and Tukey’s test; F(2,9) = 23.54, 37.45 (B). Below the right panel (A), brain and serum concentrations, and brain-to-serum ratios of CPD10 (mean ± SD; n = 6 mice) are shown. See also G and S5H. (C and D) Immunoblot of hippocampal, mitochondrial GRK2 (C) and TOMM6 (D) of 18-month-old, untreated (18 mo) and CPD10-treated (18mo + CPD10) Tg2576 mice. The control blot detects TOMM40. Data represent mean ± SD; n = 4 biological replicates; unpaired, two-tailed t test; df = 6; t = 6.179, 1.729 (C); t = 7.540, 20.48 (D). (E and F) Hippocampal mitochondrial ACO2 activity without and with reactivation (E), and ATP contents (F) were determined in 18-month-old, untreated (18 mo), CPD10-treated (18mo + CPD10), and 12-month-old, untreated (12 mo) Tg2576 mice. Data represent mean ± SD ( n = 4 mice per group); one-way ANOVA and Tukey’s test; F(2,9) = 135.2, 13.11 (E); 30.06 (F). (G and H) Immunoblot of synaptosomal, hippocampal SNAP25 in 18-month-old, untreated (18 mo), CPD10-treated (18mo + CPD10), and 12-month-old, untreated (12 mo) Tg2576 mice. The control blot detects GNAO. Data are mean ± SD ( n = 4 mice per group); one-way ANOVA and Dunnett’s test; F(2,9) = 11.64 (G). (I) Immunofluorescence of mitochondrial TOMM40 (red) and GRK2 (green) in the hippocampal CA1 area of brain specimens from 18-month-old, CPD10-treated (Tg2576 18mo + CPD10) and untreated (Tg2576 18mo) Tg2576 mice. Nuclei were stained with DAPI (blue); scale bars: 20 μm. Immunofluorescence is representative of n = 7 mice per group. Three replicates are shown in . Four replicates are shown in A and S1D. (J) Overrepresentation analysis of significantly up-regulated transcripts (≥2-fold; p < 0.05) in frontal cortices of 18-month-old CPD10-treated Tg2576 mice compared to untreated mice. Biological processes (GO:BP) with p values <0.001 in the overrepresentation analysis and involvement in neurogenesis are shown. p values are presented as negative log10 of adjusted p values. Data are shown in . (K) Heatmap of significantly different ( p < 0.05) transcripts ( NeuN , Gfap , and Cx3cr1 ) in frontal cortices of 18-month-old, CPD10-treated Tg2576 (AD + C10) compared to untreated Tg2576 mice (AD). Data are shown in . (L) Activities of hippocampal α-, β-, and γ-secretase in 18-month-old, untreated (18 mo) and CPD10-treated (18mo + CPD10) Tg2576 mice. Data represent mean ± SD ( n = 6 mice per group); unpaired, two-tailed t test; df = 10, t = 4.303, 5.280, 5.049. (M) Immunohistological detection of Aβ plaques (brown) on coronal brain sections of 18-month-old, untreated (18 mo) and CPD10-treated (18mo + CPD10) female (f) and male (m) Tg2576 mice. Counterstaining was performed with hematoxylin (HE). Immunohistology is representative of six mice per group (scale bar: 200 μm). Replicates and quantitative data are shown in A and S5B. (N and O) Insoluble (N) and soluble (O) Aβ1-40 and Aβ1-42 in brains of 18-month-old, untreated (18 mo) and CPD10-treated (18mo + CPD10) Tg2576 mice. Data represent mean ± SD ( n = 6 mice per group); unpaired, two-tailed t test; df = 10; t = 14.91, 16.01 (N); 5.352, 2.937 (O). (P) Probability of survival of CPD10-treated (+CPD10) and untreated Tg2576 mice ( n = 18 mice) was determined by Kaplan-Meier survival analysis with log rank (Mantel-Cox) test; df = 1, chi-square = 6.800. See also A, S1D–S1H, , , and ; and .
Article Snippet: Rabbit polyclonal anti-ADRBK1/GRK2 antibodies against the N-terminus of GRK2; Lot WOVUS 31186 , LSBio , LS-C358899.
Techniques: Western Blot, Control, Two Tailed Test, Activity Assay, Immunofluorescence, Staining