AI Article Synopsis
- The study examines how genetic differences impact individual responses to the pain-relieving drug remifentanil in patients undergoing gynecological surgery.
- Researchers analyzed pain thresholds and genetic variations in 137 patients, discovering specific gene polymorphisms that influence both the drug's effectiveness and potential side effects like respiratory depression.
- Key findings indicate that certain genetic variants lead to increased sensitivity to pain relief and suggest that age may also play a role in how patients respond to remifentanil.
Article Abstract
What Is Known And Objective: Significant individual differences have been observed in pain sensitivity and analgesic effect of opioids. Previous studies have shown that genetic factors contributed to analgesics requirement obviously. Therefore, we investigated the role of genetic polymorphisms in the sensitivity to the analgesic effect of remifentanil in this study.
Methods: One hundred thirty-seven patients undergoing gynaecological surgery were observed. Before procedures, we measured the basal pain threshold of each patient, including the pressure pain threshold and pressure pain tolerance threshold. Subsequently, patients received a continuous remifentanil infusion for 15 min at a constant rate of 0.2 μg/(kg min). The pain thresholds were measured again after the remifentanil infusion. Moreover, respiratory depression was estimated using oxygen saturation during infusion. DNA was extracted from peripheral venous blood and genotyped using SNaPshot technology.
Results And Discussion: Polymorphisms were found in genes associated with the individual variation in analgesia. Participants carrying OPRM1 rs9397685 AA, ADRB1 rs1801253 CC, and GCH1 rs8007267 CC polymorphisms showed higher sensitivity to analgesic effect induced by remifentanil, and the participants carrying the OPRD1 rs2234918 TT showed lower sensitivity to remifentanil-related respiratory depression. Moreover, individual susceptibility to remifentanil increases with age.
What Is New And Conclusion: Gene variation in OPRM1 rs9397685 AA, ADRB1 rs1801253 CC, GCH1 rs8007267 CC, and OPRD1 rs2234918 TT were related to the conspicuous interindividual differences in the analgesia and respiratory depression of remifentanil, mainly by affecting the target protein receptors and relative metabolic enzymes.
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| http://dx.doi.org/10.1111/jcpt.13780 | DOI Listing |
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