Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type& ?& H H0 F, E
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 $ f0 `* p7 P: u) }, O
+ Author Affiliations. Q4 b' l8 [$ V2 t$ m0 C
7 N0 F7 b H6 }4 M1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ' Q: U: K6 Y* E6 O1 L* H; e$ a
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 e; y, `1 g4 P5 Q: n5 f: U& D3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ~& B5 c8 k; ]+ ]" Y. t: A) Q: r0 B
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 7 W4 [/ _" _1 {4 \9 Z7 m2 j
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
3 ~$ L( N' _5 h s, \6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
( F! E( V$ W! h' E8 h1 X0 s. j5 b7Kinki University School of Medicine, Osaka 589-8511, Japan 0 R5 b, b* W1 z. d) j* K
8Izumi Municipal Hospital, Osaka 594-0071, Japan
) S, m, W0 E& U, f9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
e, x0 ?3 G3 o/ P, @1 H [4 A4 hCorrespondence 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 ^! q5 R7 k/ P9 ?1 c9 H
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. 5 c A( `, g6 y. Z0 D
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