1. The effects of nitrous oxide on vitamin B12 and homocysteine: Levels in methyltetrahydrofolate reductase gene mutation
- Author
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Hilal Ayoğlu, Ahmet Dursun, Görkem Mungan, Murat Can, Serhan Yurtlu, S Hakimoglu, I. O. Turan, S Cicek, Volkan Hanci, Y Hakimoglu, Rahşan Dilek Okyay, and Zonguldak Bülent Ecevit Üniversitesi
- Subjects
Adult ,Male ,Economics and Econometrics ,Homocysteine ,General anesthesia ,Gene mutation ,Fentanyl ,Methyltetrahydrofolate reductase ,chemistry.chemical_compound ,Double-Blind Method ,Materials Chemistry ,Media Technology ,medicine ,Humans ,Prospective Studies ,Vitamin B12 ,Methylenetetrahydrofolate Reductase (NADPH2) ,Polymorphism, Genetic ,Nitrous oxide ,biology ,business.industry ,Forestry ,Venous blood ,Middle Aged ,Vitamin B 12 ,chemistry ,Methylenetetrahydrofolate reductase ,Anesthesia ,Mutation ,biology.protein ,Female ,Gene polymorphism ,business ,Propofol ,medicine.drug - Abstract
WOS: 000321023200004, PubMed: 23731042, Background: We aimed to investigate the effects of nitrous oxide on plasma total homocysteine and vitamin B12 levels in patients with or without methyltetrahydrofolate reductase (MTHRF) gene mutation. Methods: After obtaining the ethics committee approval and written informed consents of patients, 93 patients between 18-70 years of age scheduled for surgery anticipated to last 1-4 hours were enrolled in the study. Patients with contraindications for nitrous oxide use were excluded. Preoperatively, blood samples were obtained from all patients for the determination of MTHFR gene mutation. Anesthesia induction was achieved with 3 mg.kg(-1) of propofol and 1 mu g.kg(-1) of fentanyl. Anesthesia maintenance was performed with sevoflurane and with a carrier gas composed of 40 % O-2 and 60 % N2O. Venous blood samples were obtained after venous canulation, and 24 hours after extubation for the analysis of plasma total homocysteine, vitamin B12 levels. Results: Eighty-one patients were included in the study. Postoperative vitamin B12 levels were found to be significantly lower when compared with their preoperative levels (p0.05). Postoperative plasma total homocysteine levels were found to be significantly different between patients with operation times under and over 3 hours (p=0.028). Conclusions: We conclude that MTHRF gene polymorphism had no significant effects on postoperative plasma total homocysteine levels. However, we found that homocysteine levels might rise in patients who received general anesthesia with nitrous oxide for longer than 3 hours (Tab. 7, Ref. 26). Full Text in PDF www.elis.sk., Karaelmas University Scientific Research Projects UnitBulent Ecevit University, This work was supported by Karaelmas University Scientific Research Projects Unit.
- Published
- 2013