Table 1.

Primer pairs for semiquantitative polymerase chain reaction.

Target gene	Primer sequences	Major product size (base pairs)
Mouse TNF-α	Forward: 5′-TTCTGTCTACTGAACTTCGGGGTGATCGGTCC-3′	354
	Reverse: 5′-GTATGAGATAGCAAATCGGCTGACGGTGTGGG-3′
Human MDR1	Forward: 5′-AGATCAACTCGTAGGAGTGTC-3′	795
	Reverse: 5′-GTTTCTGTATGGTACCTGCAA-3′
Mouse β-actin	Forward: 5′-GTGGGCCGCTCTAGGCACCAA-3′	540
	Reverse: 5′-CTCTTTGATGTCACGCACGATTTC-3′
Human β-actin	Forward: 5′-GAGACCTTCAACACCCCAGCC-3′	311
	Reverse: 5′-GGCCATCTCTTGCTCGAAGTC-3′

MDR, multiple drug resistance; TNF, tumour necrosis factor.