primer sequences
Bcl-6(forward)	5′-TCCAGTCCCCACTCACTCAC-3′
Bcl-6(reverse)	5′-TTGCTCAAAACCAAATGAGCACT-3′
p53(forward)	5′-TTATGGCGGGAGGTAGACTG-3′
p53 (reverse)	5′-GTTCCGAGAGCTGAATGAGG-3′
GAPDH (forward)	5′-ACCAGCCTCAAGATCATCAGC-3′
GAPDH (reverse)	5′-TGCTAAGCAGTTGGTGGTGC-3′