Journal: Advanced Science
Article Title: Depletion of Hepatic SREBP2 Protects Against Hypercholesterolemia and Atherosclerosis through the ANGPTL3‐LPL Axis
doi: 10.1002/advs.202412677
Figure Lengend Snippet: Depletion of hepatic SREBP2 promotes Lipoprotein lipase activity in the absence of LDLR. A,B) Plasma lipoprotein lipase contents (A) and lipoprotein lipase activity (B) measured in heparinized C57BL/6J or Ldlr −/− male mice injected with AAV8‐scramble control or AAV8‐ Srebf2 ‐shRNA viruses under chow diet feeding ( n = 8 mice per group, by two‐way ANOVA). C,D) Plasma lipoprotein lipase contents (C) and lipoprotein lipase activity (D) measured in heparinized Ldlr −/− male mice injected with AAV8‐scramble control or AAV8‐ Srebf2 ‐shRNA viruses under 5‐week chow diet feeding followed by 3‐week western diet feeding ( n = 6–8 mice per group, by student's t test). E) Relative expression of the genes involved in de novo lipogenesis, cholesterol synthesis and LPL regulation measured by RNA‐seq using different CRISPR/Cas9‐mediated genetically modified AML12 mouse hepatocyte cell line ( n = 3 replicates for each cell line). F,G) qPCR expression analysis of genes modulating LPL activity in the liver of C57BL/6J (F) and Ldlr −/− (G) mice injected with AAV8‐scramble control or AAV8‐ Srebf2 ‐shRNA viruses under 5‐week chow followed by 5‐week western diet feeding ( n = 5–6 mice per group, by student's t test). H) qPCR expression analysis of ANGPTL3 , ANGPTL4 , and ANGPTL8 in SREBF2 knockout and control Huh7 human hepatoma cells ( n = 3 replicates for each cell line, representative of 3 independent experiments, by student's t test). I) qPCR expression analysis of ANGPTL3 , ANGPTL4 , and ANGPTL8 in SREBF2 knockout or control Huh7 human hepatoma cells lacking LDLR ( n = 3 replicates for each cell line, representative of 3 independent experiments, by student's t test). J–M) Western blot (J and L) and quantification (K and M) of ANGPTL3 (FL stands for full length) and ANGPTL8 in heparinized plasma of 4h‐fasted male C57BL6J mice (J and K, n = 7 mice per group, by t student's t test) and mice lacking LDLR (L and M, n = 6–8 mice per group, by student's t test) injected with AAV8‐scramble control or AAV8‐ Srebf2 ‐shRNA viruses fed chow. N,O) Western Blot of cellular (N) and secreted (O) ANGPTL3 protein in SREBF2 knockout and control LDLR +/+ and LDLR −/− Huh7 human hepatoma cells (representative of 3 independent experiments). P,Q) Western blot and relative quantification of ANGPTL3 in heparinized plasma of 4 h fasted male C57BL/6J mice and mice lacking LDLR injected with AAV8‐scramble control or AAV8‐ Srebf2 ‐shRNA viruses fed chow (3 representative mice of each group consisting of 6–8 mice, by one‐way ANOVA). * p < 0.05, ** p < 0.01, and *** p < 0.001; Error bars indicate mean ± SD.
Article Snippet: The AML12 (alpha mouse liver 12) cell line was established from hepatocytes obtained from a male mouse (CD1 strain, line MT42) transgenic for human TGF alpha (ATCC, ATCC CRL‐2254).
Techniques: Activity Assay, Clinical Proteomics, Injection, Control, shRNA, Western Blot, Expressing, RNA Sequencing, CRISPR, Genetically Modified, Knock-Out, Quantitative Proteomics