Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type3 c9 T* R$ G3 \# m( H0 k$ t
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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; `% _6 j' Z- T/ Y, v( _9 B1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
m! z' F1 n* H2 P$ S- a2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
- \; D( |8 `# e' {3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ( T: l2 x. R7 k1 B. C- F6 [& K
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan $ {" U: Y" W- L; M* m- T& ^
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
; o3 X- \ R( F/ m! I( y2 R; `4 j6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
* n! l5 {( q4 l. j# n* }; B7Kinki University School of Medicine, Osaka 589-8511, Japan + S3 v# }/ ? l. I8 B# b+ m
8Izumi Municipal Hospital, Osaka 594-0071, Japan / o( D) a$ |; L. m0 s, x/ y+ I
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan K2 s* l, b* D+ }% B3 @
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 8 `# \6 M L. O3 e. j% N: e3 Q( f
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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