150 ng of primers
and DEPC-treated water to give a volume of 10 L. Samples were
incubated at 65 ◦C and immediately placed in glass for 1 min. A solution
of 2.0 L of RT buffer (10×), 4.0 L of 25 mM MgCl2, 2.0 L of
0.1 mM DTT and 1.0 L of RNaseOUTTM Recombinant RNase Inhibitor
was prepared and 9.0 L was added to each sample. The mixture
was shaken in a vortex, centrifuged at 950
×
g for 5 min and incubated
at 42 ◦C for 2 min. Fifty units of the enzyme SuperScriptTM II
RT were placed in the tubes and left at 42 ◦C for 50 min, and cDNA
synthesis was performed at 70 ◦C for 15 min. cDNA was quantified
by spectrophotometry through readings at wavelengths of 260 nm
and 280 nm. The efficiency of the synthesis was evaluated by amplifying
the gene obtained from ß-actin using RT-PCR and the primers
ß-AC Forward