Primer sequences (forward, reverse) and amplification conditions used for semi-quantitative RT-PCR for the amplification of target transcripts (hex, gusb, ctsl, hsp70) and housekeeping genes (18 S rRNA, actb). In all cases, a previous denaturation step at 94 ◦C for 2 min and a final elongation step at 72 ◦C for 8 min were carried out