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― 135 ― Phase II trial of belotecan in patients with relapsed small-cell lung cancer after irinotecan-containing chemotherapy

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― 135 ―

Phase II trial of belotecan in patients with relapsed small-cell lung cancer after irinotecan-containing chemotherapy

Division of Hemato-Oncology, Department of Internal Medicine, Yonsei University College of Medicine

*Jaeheon Jeong, Se Hyun Kim, Hye Jin Choi, Sang Joon Shin, Byoung Chul Cho, Im Chong Kuen Young Joo Lee, Joo Hyuk Sohn, Joo Hang Kim

Background : Belotecan (Camtobell? Chong Kun Dang Pharm) is a novel camptothecin analogue, topoisomerase-I inhibitor.

This phase II trial was conducted to evaluate the activity of belotecan against irinotecan -sensitive relapsed small-cell lung cancer (SCLC). Methods : A sensitive relapsed SCLC patients, who were defined as relapsed at least 3 months after having achieved complete or partial response to 1st line irinotecan-containing chemotherapy, were eligible for this trial. Belotecan was administered as a 30-minute daily intravenous injection at a dose of 0.5mg/m2/day for 5 consecutive days every 3 weeks. From the second cycle, the daily dose of belotecan was adjusted to one of three dose levels, 0.4, 0.5, or 0.6 mg/m2/day, based on the toxicities after the each cycle. Results : Between March 2006 and May 20007, a total of 21 patients were enrolled (median age 63, 17M/4F, ECOG PS 0-1 95%). A total of 92 cycles of belotecan were delivered with a median of 6 cycles. The dose level of belotecan was 0.4 mg/m2/day in 23 cycles, 0.5 in 54, and 0.6 in 15. The most frequent grade 3/4 toxicities were related to myelosuppression including neutropenia in 91% of patients and thrombocytopenia in 43%. No febrile neutropenia or bleeding was observed. Non-hematologic toxicities were mild. There was no treatment-related death. Overall objective response rates were 24% (95% CI, 3.9 ?43.6 ; 0 CR, 5 PR, 10 SD, 6 PD). With a median follow-up duration of 6.3 months, median progression free survival was 4.4 months (95% CI, 2.6 ?6.3) and median overall survival wasn't reached. Conclusions : Belotecan shows promising activity in relapsed SCLC, with predictable and manageable toxicities. Therefore, this topoisomerase-I inhibitor is a treatment option for patients with sensitive relapsed SCLC, who have responded to irinotecan-containing chemotherapy.

― 136 ―

Nitrosourea 및 방사선 치료 후 재발한 glioblastoma 환자에서 temozolomide 구제 항암요법의 효과에 관한 연구

서울대학교 병원 내과1, 신경외과2, 방사선종양학과3

*차용준1․김대영1․임주한1․김유정1․이세훈1․박철기2․김동완1․허대석1․김일한3․정희원2

Glioblastoma (이하 GBM)는 초 치료 후 거의 대부분 재발하는 반면 재발한 경우의 효과적인 salvage therapy에 대해서는 아직 consensus가 없다. 이 연구에서는 초 치료로 nitrosourea 및 방사선 치료를 받은 후에 재발한 glioblastoma 환자에서 salvage chemotherapy regimen으로서의 temozolomide의 효과에 대해 알아보고자 했다. 2001년 1월 ~ 2007년 6월까지 이전에 nitrosourea 및 방사선 치료를 받고 재발한 glioblastoma 환자 중 temozolomide를 salvage regimen으로 사용한 환자들을 대상으로 후향적인 분 석을 시행했다. Response는 MRI 소견 및 스테로이드 사용, 임상양상을 바탕으로 Macdonald’s criteria (JCO, 1990)를 사용하여 평가 했으며, 치료에 대한 독성은 CTCAE v3.0을 기준으로 평가했다. 총 35 명의 환자의 median age는 50세 (range 25~69)였으며, ECOG performance scale의 중간 값은 1 (range 0~3)이었다. 초치료 시 nitrosourea regimen으로는 35명 모두 ACNU를 사용했으며, BCNU 및 CCNU를 사용한 환자는 없었다. Temozolomide 항암 치료 cycle (150mg/m2/day for 5 days)의 중간 값은 3회(range 1~

6)였으며, 7명이 6 회의 cycles을 받았다. 35 명 중 follow-up loss를 제외한 총 32명에서 response evaluation이 가능했는데, overall response rate는 16% 였다. 5명(16%)에서 PR, 8명(25%)에서 SD, 19명(59%)에서 PD로 판정되었으며 CR은 보고되지 않았다.

Median progression-free survival (PFS) 은 13 주 (95%C.I. 4~21)이었으며, 6개월 progression-free survival rate는 26% 였다.

Hematologic toxicity는 grade 1 neutropenia가 2명에서, grade 1, 2의 thrombocytopenia가 각 1명에서 있었으며, grade 3 이상의 hematologic 및 non-hematologic toxicity는 보고되지 않았다. Nitrosourea 및 방사선 치료를 받은 후에 재발한 glioblastoma 환자에 서 temozolomide는 낮은 독성과 더불어 실제적인 항 종양 효과를 보임으로써 salvage chemotherapy regimen으로 고려될 만하다.

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