TY - JOUR
T1 - Effects of obstructive sleep apnea and obesity on morphine pharmacokinetics in children
AU - Dalesio, Nicholas M.
AU - Lee, Carlton K.K.
AU - Hendrix, Craig W.
AU - Kerns, Nikole
AU - Hsu, Aaron
AU - Clarke, William
AU - Collaco, Joseph M.
AU - McGrath-Morrow, Sharon
AU - Yaster, Myron
AU - Brown, Robert H.
AU - Schwartz, Alan R.
N1 - Funding Information:
of Colorado School of Medicine, Aurora, Colorado; and #Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland. Accepted for publication September 25, 2019. Funding: This work received funding from Society of Pediatric Anesthesiology (SPA) Young Investigator Award (No. 123836). Principle Investigator: Nicholas M. Dalesio, MD, MPH. The authors declare no conflicts of interest. Institutional review board: Approved by the Johns Hopkins Institutional Review Board (No. IRB00059675) and conducted in accordance with its guidelines. Tel: 410-502-2092; 1620 McElderry St, Reed Hall - B130, Baltimore, MD 21205-1911; E-mail: jhmeirb@jhmi.edu.
Publisher Copyright:
© 2020 Lippincott Williams and Wilkins. All rights reserved.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - BACKGROUND: Obesity increases susceptibility to chronic pain, increases metabolism, and is associated with obstructive sleep apnea syndrome (OSAS), all which can complicate perioperative pain management of patients. In addition, obesity and OSAS can cause elevation of the adipose-derived hormone leptin, which increases metabolism. We hypothesized that obesity along with sleep apnea and leptin independently enhance morphine pharmacokinetics. METHODS: Children 5-12 years of age who were presenting for surgery were administered a morphine dose of 0.05 mg/kg. Blood was collected at baseline and at subsequent preset times for pharmacokinetic analysis of morphine and its metabolites. Three groups were studied: a nonobese group with severe OSAS, an obese group with severe OSAS, and a control group. RESULTS: Thirty-four patients consisting of controls (n = 16), nonobese/OSAS (n = 8), and obese/OSAS (n = 10) underwent analysis. The obese/OSAS group had a higher dose-adjusted mean maximum morphine concentration (CMAX) over 540 minutes compared to the controls (P <.001) and those with only OSAS (P =.014). The obese/OSAS group also had lower volume of distribution (Vd) when compared to OSAS-only patients (P =.007). In addition, those in the obese/OSAS group had a higher morphine 3-glucuronide (M3G) maximum concentration (P =.012) and a higher ratio of M3G to morphine than did the control group (P =.011). Time to maximum morphine 6-glucuronide (M6G) concentration was significantly lower in both nonobese/OSAS and obese/OSAS groups than in the control group (P <.005). C-reactive protein (CRP), interleukin (IL)-10, and leptin were all higher in the obese/OSAS group than in controls (P =.004, 0.026, and <0.001, respectively), and compared to OSAS-only patients, CRP (P =.013) and leptin (P =.002) levels were higher in the obese/OSAS group. CONCLUSIONS: The combination of obesity and OSAS was associated with an increase in morphine metabolism compared with that in normal-weight controls. Our previous study in mice demonstrated that obesity from leptin deficiency decreased morphine metabolism, but that metabolism normalized after leptin replacement. Leptin may be a cause of the increased morphine metabolism observed in obese patients.
AB - BACKGROUND: Obesity increases susceptibility to chronic pain, increases metabolism, and is associated with obstructive sleep apnea syndrome (OSAS), all which can complicate perioperative pain management of patients. In addition, obesity and OSAS can cause elevation of the adipose-derived hormone leptin, which increases metabolism. We hypothesized that obesity along with sleep apnea and leptin independently enhance morphine pharmacokinetics. METHODS: Children 5-12 years of age who were presenting for surgery were administered a morphine dose of 0.05 mg/kg. Blood was collected at baseline and at subsequent preset times for pharmacokinetic analysis of morphine and its metabolites. Three groups were studied: a nonobese group with severe OSAS, an obese group with severe OSAS, and a control group. RESULTS: Thirty-four patients consisting of controls (n = 16), nonobese/OSAS (n = 8), and obese/OSAS (n = 10) underwent analysis. The obese/OSAS group had a higher dose-adjusted mean maximum morphine concentration (CMAX) over 540 minutes compared to the controls (P <.001) and those with only OSAS (P =.014). The obese/OSAS group also had lower volume of distribution (Vd) when compared to OSAS-only patients (P =.007). In addition, those in the obese/OSAS group had a higher morphine 3-glucuronide (M3G) maximum concentration (P =.012) and a higher ratio of M3G to morphine than did the control group (P =.011). Time to maximum morphine 6-glucuronide (M6G) concentration was significantly lower in both nonobese/OSAS and obese/OSAS groups than in the control group (P <.005). C-reactive protein (CRP), interleukin (IL)-10, and leptin were all higher in the obese/OSAS group than in controls (P =.004, 0.026, and <0.001, respectively), and compared to OSAS-only patients, CRP (P =.013) and leptin (P =.002) levels were higher in the obese/OSAS group. CONCLUSIONS: The combination of obesity and OSAS was associated with an increase in morphine metabolism compared with that in normal-weight controls. Our previous study in mice demonstrated that obesity from leptin deficiency decreased morphine metabolism, but that metabolism normalized after leptin replacement. Leptin may be a cause of the increased morphine metabolism observed in obese patients.
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U2 - 10.1213/ANE.0000000000004509
DO - 10.1213/ANE.0000000000004509
M3 - Article
C2 - 31688081
AN - SCOPUS:85090571539
SN - 0003-2999
VL - 131
SP - 876
EP - 884
JO - Anesthesia and Analgesia
JF - Anesthesia and Analgesia
IS - 3
ER -