[BETA-ADRENERGIC REGULATION OF THE ADENYLYL CYCLASE SIGNALING SYSTEM IN MYOCARDIUM AND BRAIN OF RATS WITH OBESITY AND TYPES 2 DIABETES MELLITUS AND THE EFFECT OF LONG-TERM INTRANASAL INSULIN TREATMENT].

Abstract

The stimulating effect of norepinephrine, isoproterenol and selective β-adrenoceptor (β3-AR) agonists BRL 37344 and CL 316.243 on the adenylyl cyclase signaling system (ACSS) in the brain and myocardium of young and mature rats (disease induction at 2 and 4 months, respectively) with experimental obesity and type 2 diabetes mellitus (DM2), and the influence of long-term treatment of animals with intranasal insulin (I-I) were studied. The AC stimulatory effects of β-agonist isoproterenol in animals with obesity and DM2 was shown to be practically unchanged. The respective effects of norepinephrine on the AC activity were attenuated in the brain of young and mature rats and in the myocardium if mature rats, and the I-I treatment led to their partial recovery. In the brain and myocardium of mature rats with obesity and DM2, the enhancement of the AC stimulatory effects of β3-AR agonists was observed, white in young rats the influence of the same pathological conditions was lacking. The I-I treatment decreased the AC stimulatory effects of β3-agonists to their levels in the control. Since functional disruption of the adrenergic agonist-sensitive ACSS can lead to metabolic syndrome and DM2, the recovery of this system by the I-I treatment offers one of the ways to correct these diseases and their complications in the nervous and cardiovascular systems.