Details of a Researcher - AKAMINE Yumiko

Relationship of nutritional or systemic inflammatory markers with efficacy of gemcitabine and cisplatin with or without durvalumab therapy for patients with unresectable or metastatic biliary tract cancer: a retrospective study.

Yayoi Fukushi, Kazuma Fujita, Yumiko Akamine, Haruka Igarashi, Katsuya Sasaki, Koji Fukuda, Hiroyuki Shibata, Masafumi Kikuchi

Journal of pharmaceutical health care and sciences 2026.02

Research paper (journal)

DOI PubMed

Influence of pharmacokinetics-related polymorphisms on asciminib exposure in patients with Japanese chronic myeloid leukemia.

Naoto Takahashi, Yumiko Akamine, Masatomo Miura

European journal of clinical pharmacology ( European Journal of Clinical Pharmacology ) 82 ( 2 ) 49 - 49 2026.01

Research paper (journal)

PURPOSE: The effects of polymorphisms in CYP3A4, UGT2B7, ABCB1, ABCG2, ABCC2, NR1I2, and AHR genes on asciminib exposure were evaluated in Japanese patients with chronic myeloid leukemia. METHODS: Plasma concentrations of asciminib (40 mg twice daily [BID] or 80 mg once daily [QD]) were measured by high-performance liquid chromatography. Statistical analysis was performed using SPSS (P < 0.05). RESULTS: For both regimens, the median asciminib area under the concentration-time curve (AUC) was significantly higher in female than in male patients (P = 0.009 and 0.004, respectively). Significant correlations were observed between the asciminib AUC of 40 mg BID or 80 mg QD and body weight (P = 0.042 and < 0.001, respectively). The asciminib AUC0-12 of 40 mg BID in patients with the -25385 T allele of the NR1I2 -25385C > T polymorphism was significantly lower than that in patients with the -25385C/C genotype (5363 and 10607 ng∙h/mL, respectively, P = 0.001). In multiple regression analyses, the NR1I2 -25385C > T polymorphism (P = 0.001) and female sex (P = 0.002) were independently predictive of a higher asciminib AUC0-12 for the 40 mg BID regimen (determination coefficient: 52.8%), whereas body weight (P < 0.001) and female sex (P = 0.047) were independently predictive of a higher asciminib AUC0-24 for the 80 mg QD regimen (determination coefficient: 52.2%). CONCLUSION: Overall, our findings showed that an adjustment of the initial asciminib dose may be needed based on genotyping information for the NR1I2 -25385C > T polymorphism and the body weight of the patient; however, further prospective studies are necessary.

DOI PubMed

Efficacy of Switching to Levetiracetam After S-1-Induced Phenytoin Concentration Increase: A Case Report.

Hayato Yokota, Haruka Igarashi, Yumiko Akamine, Shinichiro Atsumi, Akise Umakoshi, Masafumi Kikuchi

Cureus 17 ( 4 ) e82653 2025.04

Research paper (journal)

S-1, an oral anticancer drug, interacts with phenytoin (PHT) to increase PHT serum concentration. Although the PHT dosage is usually adjusted, few studies have examined the effects of switching from PHT to another antiepileptic drug. Here, we report the details of a case in which a patient with gastric cancer continued adjuvant chemotherapy after switching from PHT to levetiracetam (LEV) to prevent interactions with S-1. A man in his 60s with advanced gastric cancer received adjuvant chemotherapy with S-1 120 mg/day (cycles of two weeks of administration followed by one week of rest). He had experienced generalized tonic-clonic seizures 48 years prior and had been taking PHT (170 mg/day) and carbamazepine (250 mg/day). On day 22 of treatment, the PHT concentration increased from 3.72 to 11.76 µg/mL. On day 25, he developed dizziness and fell. Gradual PHT dose reduction and a switch to LEV improved his symptoms, and he remained seizure-free over nine treatment cycles. The findings of this case report suggest an approach for switching from PHT to another antiepileptic drug when PHT levels increase due to interactions with S-1. Switching to LEV may result in fewer interactions.

DOI PubMed

Comparison of Serum Vancomycin Concentrations using a New Automated Analyzer based on High-Performance Liquid Chromatography and Chemiluminescent Immunoassay

Akamine Yumiko, Matsushita Miyuki, Morikawa Satoru, Miura Masatomo

Iryo Yakugaku (Japanese Journal of Pharmaceutical Health Care and Sciences) ( Japanese Society of Pharmaceutical Health Care and Sciences ) 51 ( 4 ) 187 - 195 2025.04

Research paper (journal)

DOI CiNii Research

Effect of isavuconazole on the concentration of tacrolimus in a patient with genotype CYP3A5*1/*3: a case report.

Hayato Yokota, Yumiko Akamine, Harumi Hatakeyama, Hideaki Kagaya, Sho Sakamoto, Mitsuru Saito, Masahide Takeda, Kazuhiro Sato, Katsutoshi Nakayama, Masafumi Kikuchi

Journal of pharmaceutical health care and sciences ( Journal of Pharmaceutical Health Care and Sciences ) 11 ( 1 ) 20 - 20 2025.03

Research paper (journal)

BACKGROUND: Azole antifungals are the standard treatment for pulmonary mycosis, which may develop during long-term immunotherapy for kidney transplant. Isavuconazole (ISCZ) is a cytochrome P450 (CYP) 3 A inhibitor that has a risk of interacting with the immunosuppressive drug tacrolimus (TAC). We report a case of simple pulmonary aspergilloma with renal dysfunction due to increased trough levels of TAC after ISCZ coadministration. CASE PRESENTATION: A male in his 60s was treated with TAC 3.0 mg/day orally to prevent graft rejection after kidney transplantation. He received a loading dose of ISCZ 600 mg/day orally for two days, followed by a maintenance dose of 200 mg/day for simple pulmonary aspergilloma. The TAC trough concentration increased markedly from 2.4 to 9.9 ng/mL on day 6 after coadministration. The creatinine level increased from 0.70 to 1.08 mg/dL, suggesting renal dysfunction due to TAC. Subsequently, the TAC dosage was reduced, leading to a decreased blood TAC concentration and improved renal function. The patient's genotype was CYP3A5*1/*3. CONCLUSIONS: In the early stages of ISCZ treatment, the blood TAC concentration is higher, and CYP3A5 polymorphisms may partially explain the extent of this interaction. We recommend more careful monitoring of TAC and serum creatinine levels for approximately one week after ISCZ administration.

DOI PubMed

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