Increased stabilities of hTDP-43 polypeptides with ALS-associated mutations. The stabilities of the exogenous hTDP-43 in transfected NSC34 (A), Neuro2a (B), and SHSY5Y (C) cells were measured by cycloheximide chase experiments as described in Methods. The Western blots of the exogenous WT hTDP-43 and MT hTDP-43A315T in transfected cells are shown as the examples of analysis. The relative amounts of hTDP-43 at different hr of cycloheximide treatment are plotted in the upper two panels. The mean values of 3 different sets of the chase experiments are used for the plots. p< 0. in NSC34, Neuro2a, and SHSY5Y cells.