ABCG2 and Hypertension: However, the ABCG2 rs2231142 polymorphism was not associated with sunitinib-induced hypertension or neutropenia (ES = 1.09, 95% CI = 0.69–1.73, p = 0.701; ES = 0.87, 95% CI = 0.57–1.31, p = 0.501).