Mouse TNFα: forward 5′-CCCTCACACTCAGATCATCTTCT-3′, reverse 5′-GCTACGACGTGGGCTACAG-3′;mouse 18S: forward 5-′ ATAACAGGTCTGTGATGCCCTTAG-3, reverse 5′-CTAAACCATCCAATCGGTAGTAGC-3′;human TNFα: forward 5′- ATGAGCACTGAAAGCATGATCC-3′, human TNFα: reverse 5′-GAGGGCTGATTAGAGAGAGGTC-3′; human 18S: forward 5′- CAGCCACCCGAGATTGAGCA -3, human 18S: reverse 5′-TAGTAGCGACGGGCGGTGTG-3′.