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  • Ovid Technologies (Wolters Kluwer Health)  (2)
  • Fukushima, Shoji  (2)
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  • Ovid Technologies (Wolters Kluwer Health)  (2)
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  • 1
    In: Therapeutic Drug Monitoring, Ovid Technologies (Wolters Kluwer Health), ( 2023-8-15)
    Abstract: Temozolomide (TMZ) is an alkylating agent used to treat glioblastoma. However, the pharmacokinetics of TMZ to establish a treatment strategy for patients undergoing hemodialysis (HD) remain unclear. In this case report, we evaluated the pharmacokinetics and HD removal rate of TMZ in a patient with glioblastoma undergoing HD to determine optimal dosing of TMZ. Methods: A 78-year-old man with glioblastoma who underwent HD 3 times a week was treated with TMZ concomitant with radiotherapy. One dose of TMZ was prescribed at 75 mg/m 2 on the day before HD and another dose of 37.5 mg/m 2 on the day before non-HD. Peak and trough concentrations (1 hour and 12 hours after dosing, respectively) were evaluated before HD and on non-HD days. HD removal rate of TMZ was calculated based on the predialyzer and postdialyzer plasma concentrations. Furthermore, the TMZ plasma concentrations were measured using liquid chromatography–tandem mass spectrometry. Results: The mean plasma peak and trough concentrations ± SD after 75 mg/m 2 TMZ were 2917 ± 914 and 108 ± 17.6 ng/mL, respectively. Those after 37.5 mg/m 2 TMZ dosage were 1305 ± 650 and 53.8 ± 11.8 ng/mL, respectively. The mean HD TMZ removal rate was 84.9 ± 1.9%. Conclusions: TMZ was tolerable in patients undergoing HD. Based on the data from a single individual pharmacokinetic perspective, the pharmacokinetics of TMZ in this patient undergoing HD were comparable with those observed in patients with normal renal function. In addition, it may be reasonable to administer TMZ after HD because of the high HD removal rate.
    Type of Medium: Online Resource
    ISSN: 0163-4356
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2023
    detail.hit.zdb_id: 2048919-5
    SSG: 15,3
    Location Call Number Limitation Availability
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  • 2
    In: Therapeutic Drug Monitoring, Ovid Technologies (Wolters Kluwer Health), Vol. 45, No. 1 ( 2023-02), p. 110-116
    Abstract: Nivolumab is an antiprogrammed death-1 (PD-1) antibody used for immuno-oncological therapy of various cancers, including nonsmall cell lung cancer (NSCLC). This study aimed to characterize the real-world population pharmacokinetics (PK) of nivolumab in patients with NSCLC. Methods: PK samples were collected by opportunistic sampling of Japanese patients with NSCLC treated with nivolumab monotherapy. Population PK analysis was performed using a two-compartment model in Nonlinear Mixed Effect Model. Patient-specific factors such as body weight, age, sex, serum albumin, estimated glomerular filtration rate, performance status, programmed cell death receptor ligand 1 expression in tumors, and treatment periods were evaluated as potential covariates for clearance. Results: A total of 223 serum samples collected from 34 patients were available for analysis. The median (min–max) age and weight were 69 years (38–83 years) and 62.7 kg (36.8–80.5 kg), respectively. The mean (95% confidence interval) clearance estimate was 0.0064 L/h (0.0058–0.0070 L/h). The inclusion of the ALB level, estimated glomerular filtration rate, and treatment period significantly improved the model fit. Conclusions: A real-world nivolumab population PK model was developed using an opportunistic sampling strategy in Japanese patients with NSCLC. Further studies are warranted to characterize the exposure–response relationship and determine the optimal dosing regimens for these patients.
    Type of Medium: Online Resource
    ISSN: 0163-4356
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2023
    detail.hit.zdb_id: 2048919-5
    SSG: 15,3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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