Figure 4. hU6-induced GRB2 suppression is efficient only after removal of the full mir30 sequence.
(A) Left: HuT78 T cells transduced with pLKO.1 lentiviral constructs expressing hU6-driven GRB2 or LUC shRNAs flanked with or without small mir30 sequences. Right: Quantification of immunoblots. (B) Left: HuT78 T cells transduced with retro-LTR LMP or lentiviral-hU6 pLK4A constructs expressing GRB2 or LUC shRNAs flanked by the full mir30 sequence. Right: Quantification of immunoblots. Data represents 3 independent experiments with similar results. (C) Nucleotide sequence of GRB2 shRNA flanked by small mir30 sequence. (D) Nucleotide sequence of GRB2 shRNA flanked by the full mir30 sequence. (E) HuT78 T cells transduced with retroviruses carrying GRB2 or LUC microRNAs, and lentiviruses carrying hU6-GRB2 or LUC shRNAs were stimulated with 5 µg/mL anti-CD3 coated plates for 24 hrs. The supernatants were probed for IL-2 production via ELISA. The data was graphed as mean LUC secretions at 5 µg/mL anti-CD3 ±SEM from three independent experiments.