Pharmacokinetic analyses of carboplatin in a patient with cancer of the fallopian tubes undergoing hemodialysis: A case report

  • Authors:
    • Takuma Wada
    • Takeshi Fukuda
    • Masaru Kawanishi
    • Reiko Tasaka
    • Kenji Imai
    • Makoto Yamauchi
    • Mari Kasai
    • Yasunori Hashiguchi
    • Tomoyuki Ichimura
    • Tomoyo Yasui
    • Toshiyuki Sumi
  • View Affiliations

  • Published online on: July 4, 2016     https://doi.org/10.3892/br.2016.714
  • Pages: 199-202
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Abstract

Opportunities for patients undergoing hemodialysis to receive chemotherapy are increasing. A combination of paclitaxel and carboplatin (TC) is first‑line chemotherapy in patients with Müllerian cancer. However, the optimal dose and time interval between the end of carboplatin administration and initiation of hemodialysis remains to be elucidated. TC was administered to a patient with fallopian tube cancer undergoing hemodialysis. The paclitaxel regimen was determined to be 135 mg/m2 (total of 210 mg) over 3 h. After paclitaxel administration, 125 mg of carboplatin was administered over 1 h to achieve a target area under the concentration‑time curve (AUC) of 5.0 mg•min/ml using the Calvert formula. The time interval between the end of carboplatin administration and hemodialysis initiation was 1 h at the first cycle, 16 h at the second cycle and 20 h at the third cycle, and the AUC obtained was 2.86, 4.16 and 6.0 mg•min/ml, respectively. The desired AUC of free platinum was demonstrated and only mild side effects were observed at the third cycle. Therefore, hemodialysis was initiated 20 h after completion of carboplatin infusion at cycles 4‑6. The total chemotherapy planned was completed without severe adverse events. Measurement of the concentration of free platinum subsequent to administration is useful for determination of the optimal dose of carboplatin and time interval following administration to obtain an adequate AUC. The present study suggests that carboplatin can be administered to a patient undergoing hemodialysis, and that an adequate interval between the end of carboplatin administration and hemodialysis initiation may be ~20 h.

Introduction

The prognosis of patients with renal failure has improved due to the refinements and advances in hemodialysis methods. Renal failure can lead to impairment of the immune system, and therefore, patients undergoing hemodialysis can suffer from various types of cancer. Consequently, the opportunity to undergo chemotherapy for patients being treated by hemodialysis is increasing.

A combination of paclitaxel and carboplatin (TC) is first-line chemotherapy for patients with Müllerian cancer. There are few studies on the TC pharmacokinetics in hemodialysis patients with Müllerian cancer. Therefore, determination of the administration method (dose and time interval between administration of anticancer agent and hemodialysis initiation) is difficult. The number of dialysis patients undergoing TC is increasing, and therefore, the establishment of the optimal method for administration of anticancer agents is important.

Certain previous studies have suggested that paclitaxel pharmacokinetics are not affected by hemodialysis (14). In the present study, carboplatin concentrations were measured in a patient with fallopian tube cancer (FTC) with chronic renal failure who required hemodialysis.

Case report

A 73-year-old Japanese woman with chronic renal failure associated with type-2 diabetes mellitus, who had undergone hemodialysis three times a week for 3 years, presented with abdominal distension. Magnetic resonance imaging revealed a tumor in the left fallopian tube (diameter, 9 cm). Carcinoma of the left adnexa was suspected, and the patient underwent abdominal total hysterectomy, bilateral salpingo-oophorectomy, partial omentectomy and pelvic lymphadenectomy. Histology revealed an endometrial adenocarcinoma (grade 2) in the left fallopian tube. The patient underwent optimal surgery and was diagnosed with stage-IC3 (International Federation of Gynecology and Obstetrics) FTC. Postoperatively, the patient was administered TC (i.v.). The chemotherapy regimen was 6 cycles, with 1 cycle every 3 weeks.

The paclitaxel regimen was determined to be 135 mg/m2 (total of 210 mg) over 3 h. After paclitaxel administration, carboplatin was administered over 1 h. The carboplatin dose was calculated according to the Calvert formula [target area under the concentration-time curve (AUC): 5 mg•min/ml] (5). The glomerular filtration rate (GFR) was determined to be zero as the urinary volume per day of the patient was 0 ml. Therefore, the carboplatin dose was calculated as 125 mg.

Hemodialysis was initiated 1 h after completion of carboplatin infusion and carried out for 4 h. Samples of heparinized blood were collected at specific times. The blood samples were centrifuged at 1,350 × g for 5 min at 4°C. The plasma aliquots were centrifuged at 1,350 × g for 15 min at 4°C in an Amicon® system (Millipore, Bedford, MA, USA) for evaluation of the free platinum based on the method of LeRoy et al (6).

The maximum plasma concentration (Cmax) of the free platinum was 3.68 µg/ml and the AUC of the free platinum was 2.86 mg•min/ml (Fig. 1). Adverse events were evaluated based on the Common Terminology Criteria for Adverse Events set by the National Cancer Institute (version 4) (7). Adverse events of grade 3 or 4 were not observed.

Due to the low AUC of free platinum in the first cycle of chemotherapy, the time interval between the end of carboplatin infusion and the start of hemodialysis was extended in the next cycle. The time interval was prolonged to 16 h at the second cycle and to 20 h at the third cycle. The Cmax of the drug in the serum at the second and third cycles were 4.16 and 4.48 µg/ml, and the AUCs were 4.33 and 6.00 mg•min/ml, respectively (Figs. 2 and 3). Grade-3 leukocytopenia and neutropenia were observed; however, chemotherapy was (in general) well-tolerated.

The desired AUC of free platinum was demonstrated and only mild side effects were observed at the third cycle. Therefore, hemodialysis was initiated 20 h after completion of carboplatin infusion at cycles 4–6. The total chemotherapy planned was completed without severe adverse events. Recurrence was not observed at the 22-month follow-up.

Discussion

The prognosis of patients with renal failure has improved due to the advances in hemodialysis methods. In addition, TC is being administered increasingly often in patients with Müllerian cancer who require hemodialysis. However, the optimal drug dose and timing of hemodialysis remain to be elucidated. In the present study, TC was administered safely to a patient with FTC requiring hemodialysis, and the carboplatin pharmacokinetics were examined.

Paclitaxel is metabolized extensively by the hepatic cytochrome P450 and secreted into bile, with <10% being extracted by the kidneys (8). Therefore, it is assumed that paclitaxel pharmacokinetics are slightly affected by renal function. It has been reported that the Cmax, AUC and attenuation pattern of paclitaxel in patients with renal failure requiring hemodialysis are comparable with the pharmacokinetics of patients with normal renal function, and that paclitaxel can be administered safely for patients with renal failure without hepatic dysfunction prior or subsequent to hemodialysis at the same dose as patients with normal renal function (14,9). Therefore, in this instance, paclitaxel was administered in a patient with renal failure instead of measuring the paclitaxel concentration in blood.

Carboplatin is metabolized almost completely by the kidneys, and renal function affects its pharmacokinetics. In general, the carboplatin dose administered is calculated based on the Calvert formula (1). In practice, the GFR in hemodialysis patients is approximately zero, so the carboplatin dose should be the target AUC ×25. Carboplatin can be dialyzed readily during hemodialysis because of its low binding capacity to proteins and intermediate molecular weight (10). Therefore, carboplatin is excreted mainly during hemodialysis in patients with renal failure, and its AUC is dependent upon the carboplatin dose and timing of hemodialysis (11,12).

In the present study, hemodialysis was initiated 1 h after completion of the administration of carboplatin (125 mg) at the first chemotherapy cycle, and the target AUC was not achieved. Therefore, the time interval between the end of carboplatin administration and beginning of hemodialysis was prolonged. An AUC of 4.33 mg/ml•min was obtained at the second chemotherapy cycle when hemodialysis was started 16 h after carboplatin administration. An adequate AUC of 6.00 mg/ml•min was achieved at the third chemotherapy cycle at a time interval of 20 h. Therefore, hemodialysis was initiated 20 h after completion of carboplatin infusion at cycles 4–6. The total chemotherapy planned was completed without severe adverse events.

Several studies have described the carboplatin dose, AUC of free platinum and interval between completion of administration and initiation of hemodialysis in hemodialysis patients (1,3,4,1215) (Table I). In this way, the optimal dose of carboplatin and timing of hemodialysis remains controversial. Therefore, guidelines for the optimal method to administer carboplatin in hemodialysis patients are required. Measurement of the concentration of free platinum following administration may be useful for determination of the optimal dose of carboplatin and interval following administration to obtain an adequate AUC. The present study suggests that carboplatin can be administered to a patient undergoing hemodialysis, and that an adequate interval between the end of carboplatin administration and hemodialysis initiation could be ~20 h.

Table I.

CBDCA dose, AUC of free platinum and interval between completion of CBDCA administration and the initiation of hemodialysis.

Table I.

CBDCA dose, AUC of free platinum and interval between completion of CBDCA administration and the initiation of hemodialysis.

Hemodialysis

First author, yearType of cancerCBDCA, mg/bodyInterval after CDBCA administration, hDuration, hAUC, mg•min/mlRefs.
Watanabe, 2002Ovarian1251644.4  (1)
Yoshida, 2009Ovarian125  141.0  (3)
Kodama, 2010Ovarian1502434.6  (4)
Suzuki, 1997Merkel cell150  244.8(12)
Chatelut, 1994Ovarian1502446.7(13)
Yokoyama, 2006Ovarian2001645.7(14)
Fong, 2014Neurocrine200       1.5  3.52.9(15)
Wada, 2016FT125  142.9(Present study)
1251644.2
1252046.0

[i] AUC, area under the concentration-time curve; CBDCA, carboplatin; FT, fallopian tube.

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Spandidos Publications style
Wada T, Fukuda T, Kawanishi M, Tasaka R, Imai K, Yamauchi M, Kasai M, Hashiguchi Y, Ichimura T, Yasui T, Yasui T, et al: Pharmacokinetic analyses of carboplatin in a patient with cancer of the fallopian tubes undergoing hemodialysis: A case report. Biomed Rep 5: 199-202, 2016.
APA
Wada, T., Fukuda, T., Kawanishi, M., Tasaka, R., Imai, K., Yamauchi, M. ... Sumi, T. (2016). Pharmacokinetic analyses of carboplatin in a patient with cancer of the fallopian tubes undergoing hemodialysis: A case report. Biomedical Reports, 5, 199-202. https://doi.org/10.3892/br.2016.714
MLA
Wada, T., Fukuda, T., Kawanishi, M., Tasaka, R., Imai, K., Yamauchi, M., Kasai, M., Hashiguchi, Y., Ichimura, T., Yasui, T., Sumi, T."Pharmacokinetic analyses of carboplatin in a patient with cancer of the fallopian tubes undergoing hemodialysis: A case report". Biomedical Reports 5.2 (2016): 199-202.
Chicago
Wada, T., Fukuda, T., Kawanishi, M., Tasaka, R., Imai, K., Yamauchi, M., Kasai, M., Hashiguchi, Y., Ichimura, T., Yasui, T., Sumi, T."Pharmacokinetic analyses of carboplatin in a patient with cancer of the fallopian tubes undergoing hemodialysis: A case report". Biomedical Reports 5, no. 2 (2016): 199-202. https://doi.org/10.3892/br.2016.714