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Phase II study of biweekly S-1 and oxaliplatin combination chemotherapy in metastatic colorectal cancer and pharmacogenetic analysis

Cited 30 time in Web of Science Cited 39 time in Scopus
Authors

Hong, Junshik; Han, Sae-Won; Ham, Hye Seon; Kim, Tae-Yong; Choi, In Sil; Kim, Byung-Su; Oh, Do-YounIm, Seock-Ah; Kang, Gyeong Hoon; Bang, Yung-Jue; Kim, Tae-You

Issue Date
2011-06
Publisher
Springer Verlag
Citation
Cancer Chemotherapy and Pharmacology, Vol.67 No.6, pp.1323-1331
Abstract
To evaluate the efficacy and safety of S-1 in combination with oxaliplatin in a biweekly schedule as first-line treatment in metastatic colorectal cancer and the association between genetic polymorphisms and treatment outcomes. Eligibility included age 18-75 years, at least one measurable lesion, no prior chemotherapy except adjuvant chemotherapy, and Eastern Cooperative Oncology Group Performance Status (PS) 0-2. S-1 40 mg/m(2) b.i.d. on days 1-7 with 85 mg/m(2) of oxaliplatin on day 1 was repeated every 2 weeks. Genomic DNA from whole blood was analyzed for 15 single-nucleotide polymorphisms (SNPs) among 8 genes. Fifty-two patients (median age 63 years, range 37-74) were enrolled: 37 men and 15 women; 44 with a PS of 0 and 8 with a PS of 1; and 41 with initially metastatic cancer and 11 with relapsed disease. Among 51 evaluable patients, objective response rate was 47.1% [95% confidence interval (CI) 32.9-61.2]. Median follow-up duration was 17.1 months (range 3.9-28.2 months). Median progression-free survival (PFS) was 6.4 months (95% CI 4.8-8.1), and median overall survival had not been reached yet. Reported grade 3 toxicities were neutropenia (7.7%), thrombocytopenia (5.8%), sensory neuropathy (7.7%) and diarrhea (1.9%). There was no grade 4 toxicity or neutropenic fever. Patients with A/G or G/G genotype in GSTP1 Ile105Val SNP had longer PFS than patients with A/A (median 8.3 vs. 6.1 months, P = 0.04). Biweekly S-1 with oxaliplatin is effective and has improved tolerability and convenience compared to other fluoropyrimidine with oxaliplatin combinations. GSTP1 Ile105Val SNP is associated with treatment outcomes.
ISSN
0344-5704
URI
https://hdl.handle.net/10371/173019
DOI
https://doi.org/10.1007/s00280-010-1425-7
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Research Area DNA 손상 반응 타겟 물질의 면역조절 효과, Effect of DNA damage response target substances on immunomodulatory action, Efficacy and biomarker validation studies of targeted therapeutics, Resistance mechanisms according to targeted therapeutics, 표적 항암제 내성 기전 연구, 표적 항암제의 효과 검증 및 바이오마커 규명

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