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Gastric motility dysfunction is most commonly seen in diabetic and idiopathic gastroparesis patients. Recently we reported that impaired nitrergic relaxation and a reduced NO (nitric oxide) bioavailability were responsible for gastric motility dysfunction in diabetic female rats. One of the main factors involved in the inactivation of the nitrergic system is oxidative stress commonly seen in diabetic patients. Hyperlipidemia may also be one of the detrimental causes for impaired gastric motility associated with diabetes. In the current study, we investigated whether apolipoprotein E knockout mice (ApoE-KO), an oxidative stress animal model with a hyperlipidemia burden, also displays an impaired nitrergic system. To test this, nitrergic relaxation (AUC/mg tissue) was measured at 2 Hz through electric field stimulation using gastric pyloric strips prepared from C57BL WT or ApoE-KO female mice. Protein expression was determined by Western blots.

Impairment of Gastric Nitrergic and NRF2 System in Apolipoprotein E Knockout Mice