Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
6 j" t% `5 Q. b1 |" U* r% Z# c3 rNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
" s( ^' _- B( r+ E: J x4 m* M+ Author Affiliations( u$ V y2 a% i
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
* g3 `: Z" z* s9 c I2 |2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 p1 f. [8 L! E* A2 d5 G2 |3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan * P6 e# u+ T7 p
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
. ^0 B C% g( R ]! L9 c8 _9 d5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
4 g7 o( \) d# t9 ^" o' X8 D. U6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
6 o- I# Y. v1 H# t) I8 B+ `7Kinki University School of Medicine, Osaka 589-8511, Japan , G1 v" g2 w# ?1 V/ F7 a
8Izumi Municipal Hospital, Osaka 594-0071, Japan
9 S1 h8 m5 a) \$ U. T4 `9 n9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
- n5 [: |2 h- ~ j2 l+ A5 ^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
1 w1 p! c( |, uAbstractBackground: 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. ! z0 U4 R( I5 D# D+ w) K& a
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