Figure 2. Effect of bee venom and/or hesperidin treatments on tumor necrosis-alpha messenger ribonucleic acid expression level in spleen tissue of complete Freund’s adjuvant-induced arthritic rats. Three replicates were used for each group. Means, which share same symbol(s), are not significantly different. TNF-a: Tumor necrosis factor-alpha; mRNA: Messenger ribonucleic acid; BV: Bee venom.