AHR and Hypertension: Since each hit induced by prenatal DEX or TCDD exposure may act synergistically to deteriorate programming effects induced by each other, and because DEX and TCDD are closely linked to the AHR pathway, we postulate that maternal TCDD exposure could promote deleterious effects on prenatal DEX-induced renal programming and hypertension in adult offspring via the mediation of the AHR pathway in this two-hit model.