Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 ?9 q4 t( E" ] @" R" YNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
( |$ l9 l2 S/ P3 Q* b6 p: T+ Author Affiliations+ _* D9 T# u" ~7 D( n6 h7 ^
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
$ n1 l9 m! H( M: S6 `- X5 V7 b2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
! a* C+ p( _ l& _) @0 \$ e% r% n3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
# ^ T: s% ?; ?. [/ U$ I4 l, G. q' |4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
) i4 M; w; M: q5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan + |$ m2 i9 g1 E+ m8 P6 ]( h' J
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
5 j, i+ z- { ~, g0 m+ n7Kinki University School of Medicine, Osaka 589-8511, Japan
) \$ [; y0 Y$ q, j9 M: `0 X8Izumi Municipal Hospital, Osaka 594-0071, Japan q. M0 s& S' x& e; ?* v
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
P# P2 j- o: N5 a6 Q3 mCorrespondence 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 - p2 J @+ h6 ]/ K, m) 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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