We studied contractile responses of isolated airway smooth muscle segments from rats with metabolic syndrome. Metabolic syndrome was induced in rats by high-fat and high-carbohydrate diet. It was shown that metabolic syndrome was associated with an increase of bronchoconstrictor action of cholinergic receptor activator carbacholine (0.1-100 μM) and a decrease of the dilatory effect of β2-adrenoreceptor activator salbutamol (0.1-100 μM). The observed effects of agonists are epithelium-dependent. Disorders in contractile activity in the airway smooth muscles were accompanied by bronchial epithelium destruction, immune inflammation in the bronchial wall, muscular and peribronchial adipose tissue hypertrophy.
Sistemnoe vospalenie lezhit v osnove patogeneza mnogih hronicheskih neinfekcionnyh zabolevanij, v tom chisle takih, kak saharnyj diabet 2-go tipa, ozhirenie, metabolicheskij sindrom (MS). Cel'yu raboty bylo ocenit' izmeneniya parametrov sistemnoj vospalitel'noj reakcii u krys v modeli diet-inducirovannogo MS. Issledovanie vypolneno na 33 krysah-samcah Wistar, raspredelennyh na kontrol'nuyu i eksperimental'nuyu gruppy. Krysy kontrol'noj gruppy (n = 15) nahodilis' na standartnoj diete. Krysy eksperimental'noj gruppy (n = 18) v techenie 12 nedel' nahodilis' na vysokozhirovoj i vysokouglevodnoj diete. Dlya ocenki intensivnosti vospalitel'nogo processa na fone metabolicheskih narushenij opredelyali obshchee kolichestvo i morfologicheskij sostav lejkocitov krovi, koncentraciyu obshchego belka, S-reaktivnogo belka, koncentraciyu citokinov IL6, IL10, TNFα, insulina i leptina. V obrazcah zhirovoj tkani ocenivali uroven' produkcii aktivnyh form kisloroda. V rezul'tate provedennogo eksperimenta u krys s MS byli zaregistrirovany obshchie priznaki vospaleniya: reaktivnyj lejkocitoz, giperproteinemiya, povyshenie koncentracii S-reaktivnogo belka v 2,6 raza (r = 0,001), IL10 — v 3,7 raza (r = 0,029), TNFα — v 4,2 raza (r = 0,035). Vyyavlennye izmeneniya proiskhodili na fone povysheniya metabolicheskoj aktivnosti visceral'noj zhirovoj tkani, o chem svidetel'stvovali giperleptinemiya i vysokaya intensivnost' processov svobodnoradikal'nogo okisleniya. Byli obnaruzheny polozhitel'nye korrelyacionnye vzaimosvyazi mezhdu urovnyami leptina i insulina v krovi (r = 0,701; r = 0,001), a takzhe mezhdu syvorotochnoj koncentraciej leptina i IL10 (r = 0,523; r = 0,012). Takim obrazom, vysokozhirovaya i vysokouglevodnaya dieta naryadu s metabolicheskimi narusheniyami pozvolyaet vosproizvesti rannie priznaki sistemnogo vospaleniya, harakternye dlya MS i ozhireniya.