Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
5 L, U) |! s: V1 D. L. m) j4 L. ENOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 / o# Z; v! j. r9 ~. {* p
+ Author Affiliations/ E; X" Q( s! [. J
) e: d2 a8 A- @. h; ]& p1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan , I# b8 ]: z4 `, ~. m4 t$ V
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 0 U5 l' j1 E* J; Z
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) d* D, M7 w# k n9 o3 S2 {7 z q w
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
' y( \' Y, S" w6 i$ @5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 2 X6 K* t l, {8 B Y5 g* t% P
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
! {" l( m$ i' P# i) ^/ {- R7Kinki University School of Medicine, Osaka 589-8511, Japan
- }9 F& a4 F7 l; C2 F9 @& H; ]8Izumi Municipal Hospital, Osaka 594-0071, Japan " t* _; w) {8 L) Z) e$ E
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
8 ~$ E( e- p; }+ d( Q7 R+ ~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
5 F% i y4 M- k t; q; @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. ( P, J4 G W% X' V5 Z4 b
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