Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
9 A; q% ~0 ~! nNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 7 h6 Q) @! {( E. o
+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan . z. `& [$ r/ `2 X! C
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
/ ]% ]9 X( I5 P, Y3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 2 q9 Y2 \: P! M: j
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
+ E; S% o! h( p. x! T5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
v$ W4 W3 q9 ?: u/ x" x6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 6 |2 ^5 q) x4 u# r' X9 n
7Kinki University School of Medicine, Osaka 589-8511, Japan
. d. ^. A( z: l, Q6 }6 D8Izumi Municipal Hospital, Osaka 594-0071, Japan , B4 q! h) r! p% m
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan , t# X8 [; `& b+ Z% h! z
Correspondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp [" V/ T/ ]4 _- `1 ? N1 p6 A
AbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type.
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