Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
* z9 G' a& w+ K/ G3 c# h8 L- zNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 z, `, |/ _: S+ D5 e& R
+ Author Affiliations. q" m+ e; \7 A9 r9 p. |: P3 y9 D7 u
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ; p1 q* L5 y! f( G5 ]7 R
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / J5 C2 {# S- M7 g
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
- ]1 M- r7 D& r1 N: P" H3 C8 [4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
4 q7 {6 w$ X8 c) A/ x. \5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
2 i( [) Q3 e- G B5 X# n2 L6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
; @( M& B! o. \1 t2 M, y0 Y7Kinki University School of Medicine, Osaka 589-8511, Japan
) y d8 M7 m( x8Izumi Municipal Hospital, Osaka 594-0071, Japan
+ ~; j3 O# h2 U- N9 M* L" I/ o9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
7 y+ U0 l9 D. r& ^8 H4 c' Z: SCorrespondence 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
: z3 Q: k; d% Q0 iAbstractBackground: 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. & e3 Z8 }& U7 ^. {/ t
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