01 January 2015 : Original article
Preoperative Oral Carbohydrate Improved Postoperative Insulin Resistance in Rats through the PI3K/AKT/mTOR PathwayZhiguo WangABCDEFG, Yiqing LiuABCDEFG, Qi LiABCDEF, Canping RuanABCDEF, Bin WuABCDEG, Qiang WangABCEFG, Zhiqian HuABCEFG, Huanlong QinABCDFG
Med Sci Monit 2015; 21:9-17
BACKGROUND: Preoperative oral carbohydrate (OCH) improves postoperative insulin resistance (PIR) and insulin sensitivity. However, the exact mechanisms involved in the improvement of PIR with respect to preoperative OCH are still not clear. The aim of this study was to investigate the involvement of preoperative OCH and PI3K/AKT/mTOR pathway in reducing PIR in rats.
MATERIAL AND METHODS: Forty male Sprague-Dawley rats were randomly assigned to PreOp, glucose, saline, and fasting groups. Rats in the PreOp, glucose, and saline groups received OCH, 5% glucose solution, and saline, respectively. Rats in the fasting group did not receive anything but were fasted 3 h before surgery. Blood glucose, insulin and leucine levels, and insulin resistance, secretion, and sensitivity indexes were measured before and after surgery. mRNA and protein (total and phosphorylated) levels of mTOR, IRS-1, PI3K, PKB/AKT, and GlUT4 were measured using real-time polymerase chain reaction and Western blot in skeletal muscles.
RESULTS: In the PIR experiment, blood glucose, serum insulin, insulin resistance, and serum leucine levels were all significantly lower in the PreOp group than in the other 3 groups (P<0.05) after surgery. HOMA-ISI were higher in the PreOp group vs the other 3 groups after surgery (P<0.05), and HOMA-b in the PreOp group was higher than that in the other 3 groups at 30 and 120 min after surgery. Additionally, post-operative phosphorylated IRS-1, PI3K, and AKT protein levels were significantly higher in the PreOp group than in the other 3 groups (P<0.05), but no significant differences were observed in their respective protein levels (P>0.05).
CONCLUSIONS: OCH decreases postoperative insulin resistance and improves postoperative insulin sensitivity in skeletal muscles through the PI3K/AKT/mTOR pathway.
Keywords: Blotting, Western, Blood Glucose - metabolism, Dietary Carbohydrates - therapeutic use, Digestive System Surgical Procedures - methods, Glucose - administration & dosage, Insulin - blood, Insulin Receptor Substrate Proteins - metabolism, Insulin Resistance - physiology, Intestine, Small - surgery, Leucine - blood, Muscle, Skeletal - physiology, Phosphatidylinositol 3-Kinases - metabolism, Postoperative Period, Preoperative Care - methods, Proto-Oncogene Proteins c-akt - metabolism, Real-Time Polymerase Chain Reaction, TOR Serine-Threonine Kinases - metabolism
01 July 2022 : EditorialEditorial: World Health Organization (WHO) Variants of Concern Lineages Under Monitoring (VOC-LUM) in Response to the Global Spread of Lineages and Sublineages of Omicron, or B.1.1.529, SARS-CoV-2
Med Sci Monit 2022; 28:e937676
27 June 2022 : Clinical ResearchShoulder Injury Related to Vaccine Administration (SIRVA) in 16 Patients Following COVID-19 Vaccination Who...
Med Sci Monit In Press; DOI: 10.12659/MSM.937430
04 June 2022 : Clinical ResearchScreening for SARS-CoV-2 Infection in Students at the Medical University of Warsaw, Poland Between November...
Med Sci Monit 2022; 28:e936962
30 May 2022 : Clinical ResearchEffects of Wearing Face Masks on Exercise Capacity and Ventilatory Anaerobic Threshold in Healthy Subjects ...
Med Sci Monit 2022; 28:e936069
05 Jul 2022 : Clinical ResearchAttention-Deficit/Hyperactivity Disorder (ADHD) and Time Perception in Adults: Do Adults with Different ADH...
Med Sci Monit In Press; DOI: 10.12659/MSM.936849
01 Jul 2022 : Clinical ResearchDoes Early-Period Patient Dissatisfaction Turn Into Satisfaction Over Time After Total Knee Replacement?
Med Sci Monit In Press; DOI: 10.12659/MSM.936792
30 Jun 2022 : Laboratory ResearchBcl-2 19-kDa Interacting Protein 3 (BNIP3)-Mediated Mitophagy Attenuates Intermittent Hypoxia-Induced Human...
Med Sci Monit In Press; DOI: 10.12659/MSM.936760
Most Viewed Current Articles
30 Dec 2021 : Clinical ResearchRetrospective Study of Outcomes and Hospitalization Rates of Patients in Italy with a Confirmed Diagnosis o...
Med Sci Monit 2021; 27:e935379
08 Mar 2022 : Review articleA Review of the Potential Roles of Antioxidant and Anti-Inflammatory Pharmacological Approaches for the Man...
Med Sci Monit 2022; 28:e936292
13 Nov 2021 : Clinical ResearchAcceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...
Med Sci Monit 2021; 27:e932788