Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
9 `3 ?# {+ r9 N5 t+ |4 w2 ANOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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f" U/ }# c& }7 `1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan & _: E1 S' L D7 v
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
5 i7 j+ O2 h9 Q Q3 I' N3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
1 _. u- n6 Y0 y2 Q+ a4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 7 E/ U& Q7 k- `( X
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan % W f* p6 D- u! N& X9 x
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ( s- h) y$ f# Y6 u. ~ w
7Kinki University School of Medicine, Osaka 589-8511, Japan
, n8 x \4 W! Z+ W- P; @' F8Izumi Municipal Hospital, Osaka 594-0071, Japan
7 N( t9 C* b. d$ f* u* k9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan / I1 }2 U- a$ p2 C3 e' n/ X
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
4 d" ~" r% n# X* U! s- vAbstractBackground: 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. * |% v9 I! n$ x0 L5 _
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