Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 N+ n' S$ G" s7 D7 ~NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 % u7 N" `3 Y. h/ C
+ Author Affiliations
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1 }( \2 z [. [% ^6 G3 T1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 2 D2 z( j ]2 }' Y3 \* A
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: u6 U& e+ c4 }3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " T% c! ]# d; J' L0 w$ M; t3 K
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
) Q5 B4 k' s0 K, k: H" E5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
5 g2 u6 g# v& S6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan , k; s, \* N+ r
7Kinki University School of Medicine, Osaka 589-8511, Japan
' O; j" P/ t0 _8Izumi Municipal Hospital, Osaka 594-0071, Japan
( O v" J U7 h9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 0 B2 j5 L( V" I$ I6 d' e
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 N( B- n8 H3 a6 O. 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. 7 F. s' m& e3 T, q* A& Q$ i
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