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Although brain was considered as an insulin-insensitive organ, recently it has appeared that insulin has some interesting effects on some brain regions like hippocampus. It has been known that intra-hippocampally administered insulin can improve learning and memory. Knowing that insulin can stimulate nitric oxide (NO) synthesis via eNOS activation and also that NO synthase (NOS) inhibitors can affect...
The goal of this study was to determine whether treatment of diabetic rats with insulin reverses impaired nitric oxide synthase-dependent reactivity of the basilar artery in vivo. We measured the diameter of the basilar artery in non-diabetic rats, diabetic (streptozotocin; 50–60 mg/kg i.p.) rats, and diabetic rats treated with insulin implants in response to acetylcholine and nitroglycerin before...
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