<p>(<b><i>A</i></b>) Brain lysates from wild-type mice were immune-precipitated using specific antibodies against LRP1, GluA1, GluA2/3 or PSD95, and their interactions were examined by Western blot (<b><i>B–E</i></b>). After infection with control NT-shRNA or LRP1-shRNA, control and LRP1-knockdown neurons were treated with cycloheximide (CHX), and the levels of GluA1 (<b><i>C</i></b>), GluA2/3 (<b><i>D</i></b>) and PSD95 (<b><i>E</i></b>) were analyzed by Western blot at different time points. (<b><i>F</i></b>) LRP1-knockdown neurons were treated with DMSO (control), proteasomal inhibitor lactacystin (Lac; 10 µM) or lysosomal inhibitor bafilomycin A1 (BA1; 5 nM) in addition to CHX. (<b><i>G</i></b>) GluA1 and PSD95 levels were analyzed by Western blot, and densitometrically quantified. The data are plotted as mean ± SD (n = 3). *, p<0.05; **, p<0.01.</p