학술논문
Ovlivnění regenerační schopnosti jater po částečné hepatektomii podáním diety se zvýšeným obsahem cholesterolu standardním a hypercholesterolemickým potkanůmInfluence of cholesterol enriched diet to liver regeneration after partial hepatectomy in wistar and hypercholesterolemic rats
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Abstract
Cíl studie: Zhodnotit regeneraci jater po částečné hepatektomii (PH) u potkanů se steatózou navozenou podáním diety obohacené o cholesterol a zhodnotit roli inzulinu a leptinu v procesu regenerace. Materiál a metody: V experimentu byli užiti standardní laboratorní potkani kmene Wistar (W) a potkani PHHC (Pražský hereditární hypercholesterolemický potkan). Potkani byli rozděleni do 4 skupin a živeni dietami 29 dní ad libitum. standardní laboratorní dietou (SLD) a dietou SLD obohacenou o 4 % cholesterolu. Částečná hepatektomie (PH) (68 %) byla provedena 28. den. Jaterní syntéza DNA po částečné hepatektomii (specifická aktivita DNA) byla stanovena na Beckman Coulter analyzer LS 6000 LL, USA. Stanovení koncentrace leptinu a inzulinu bylo provedeno s využitím kitů DRG, Marburg, Germany (Rat Leptin and Insulin RIA kit). Koncentrace sérové glukózy (mmol/l) byly stanoveny systémem Modular Roche, Basel, Švýcarsko. Výsledky byly statisticky zpracovány softwarem SigmaStat 3.1, Jandel Scientific, San Rafael, CA, USA. Výsledky a závěr: Podávání diety obohacené o cholesterol vedlo k supresi jaterní regenerace v porovnání s kontrolní skupinou, která dostávala standardní laboratorní dietu. Změny v koncentraci leptinu a inzulinu v séru u potkanů živených dietou obohacenou o cholesterol vedly ke změnám v metabolismu a k ovlivnění jaterní regenerace.
Objective: Aim of our study was to show how different diets changed liver regeneration after partial hepatectomy (PH). Methods: Male Wistar (W) and Prague Hereditary Hypercholesterolemic rats (PHHC) were divided into groups and fed by different diets ad libitum for 29 days: standard laboratory diet and diet with addition of 4% cholesterol. Two third partial hepatectomy (PH) was then performed. Liver DNA synthesis was estimated by Beckman Coulter analyzer (Beckman, USA). Serum glucose (mmol/l, Modular Roche), leptin and insulin (ng/l, EIA, DRG, Marburg, Germany) were estimated before and after PH. Statistics: t-test (mean ± SEM) was performed using SigmaStat software (Jandel Scientific, USA). Results and Conclusions: There was missing interplay between leptin and insulin with adequate activation of glucose and lipids metabolisms to initiation of liver regeneration in rats with CHOL diet.
Lenka Pavlíková, Pavel Živný, Helena Živná, Petra Mocková, Vladimír Palička
Lit.: 5
Objective: Aim of our study was to show how different diets changed liver regeneration after partial hepatectomy (PH). Methods: Male Wistar (W) and Prague Hereditary Hypercholesterolemic rats (PHHC) were divided into groups and fed by different diets ad libitum for 29 days: standard laboratory diet and diet with addition of 4% cholesterol. Two third partial hepatectomy (PH) was then performed. Liver DNA synthesis was estimated by Beckman Coulter analyzer (Beckman, USA). Serum glucose (mmol/l, Modular Roche), leptin and insulin (ng/l, EIA, DRG, Marburg, Germany) were estimated before and after PH. Statistics: t-test (mean ± SEM) was performed using SigmaStat software (Jandel Scientific, USA). Results and Conclusions: There was missing interplay between leptin and insulin with adequate activation of glucose and lipids metabolisms to initiation of liver regeneration in rats with CHOL diet.
Lenka Pavlíková, Pavel Živný, Helena Živná, Petra Mocková, Vladimír Palička
Lit.: 5