FIGURE 5.
L-Arg deprivation inhibits HuR expression by impairing global translation. A, Detection of HuR mRNA levels using real-time PCR after culture of cells in medium with or without L-Arg for 24 and 48 h. B, Pulse-chase analysis for HuR in activated T cells cultured in the presence or absence of L-Arg for 48 h. C and D, HuR mRNA and total mRNA levels were tested in polysomes isolated using sucrose gradients from activated T cells cultured in the presence or absence of L-Arg for 48 h. The experiment was repeated a minimum of three times, with similar results having been obtained.