RT-PCR was performed using SYBR Green I technology on iQ5
System (BioRad, USA). The reactions consisted of 1x SYBR Green
PCR Master Mix (SYBR biopars, GUASNR, Iran), 300 nm of each specific forward and reverse primers, 10 ng of cDNA, and nuclease free
water to a final volume of 20l.
The cycling conditions were as follows: cDNA was denatured at
94
◦
C for 3 min, followed by 35 cycles of 94
◦
C for 15 s and 59.8
◦
C
for 15 s (gain set at 10 for SYBR Green). All samples were amplified in triplicate from the same RNA preparation and the mean
value was considered. Two biological replications were used for
each plate. The RT-PCR efficiency was assessed for each gene based
on the slope of a linear regression model[22]. The bulks of each
cDNA sample were used as PCR template in a range of 10-fold
dilution series. The corresponding RT-PCR efficiencies were calculated based on the slope of the standard curve using the following
equation: (E=10−1/slope−1)[23]