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Bastami, Salumeh; Gupta, A.; Zackrisson, Anna Lena; Ahlner, Johan; Osman, Abdimajid; Uppugunduri, Srinivas
Basic & clinical pharmacology & toxicology, 2014, Letnik: 115, Številka: 5Journal Article
Therapeutic modulation of pain with morphine and other opioids is associated with significant variation in, both, effects and adverse effects in individual patients. Many factors including gene polymorphisms have been shown to contribute to the interindividual variability in the response to opioids. The aim of this study was to investigate the significance of UGT2B7, OPRM1 and ABCB1 polymorphisms for interindividual variability in morphine induced analgesia in patients undergoing hysterectomy. The frequency of these polymorphisms was also investigated in forensic autopsy cases as morphine is also a very commonly abused drug Blood samples were collected from 40 patients following abdominal hysterectomy, 24 hours after initiation of analgesia through a PCA pump. Samples were genotyped and analysed for morphine and its metabolites. We also genotyped approximately 200 autopsy cases found positive for morphine in routine forensic analysis. Patients homozygous for UGT2B7 802C needed significantly lower dose of morphine for pain relief. The same trend was observed for patients homozygous for ABCB1 1236T and 3435T, as well as to OPRM1 118A. Dose of morphine in patients included in this study was significantly related to variation in UGT2B7 T802C. Age was significantly related to both dose and concentration of morphine in blood. Regression analysis showed that 30% of differences in variation in morphine dose could be explained by SNPs in these genes. The genotype distribution was similar between the forensic cases and the patients. However, the mean concentration of morphine was higher in forensic cases compared to patients. We conclude that gene polymorphisms contribute significantly to the variation in morphine levels observed in individual patients.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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