Tumor volume and final tumor weight in saline- and Exendin-4-treated rats bearing the Yoshida sarcoma. a In TBU rats, tumor volume was comparable between saline- and Exendin-4-treated groups. b In TBL rats, tumor volume was significantly lower in Exendin-4-treated animals from days 17 to 23, as compared to saline-treated animals (p < 0.05). c On the day of sacrifice, tumors were removed and weighed. While no differences were observed between saline- and Exendin-4-treated TBU rats, tumors isolated from Exendin-4-treated TBL rats weighed significantly less than those isolated from saline-treated TBL rats. *p < 0.05