Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type; E& }# z9 T* U7 Z
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
4 b! Q' j5 W+ r+ Author Affiliations1 D+ A" T( ]5 L) w
7 g6 _& a$ S; z8 d1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 6 {8 _2 l! o* W$ T0 J# K2 h
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
: N F7 x5 t* K8 ?3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan $ n0 x: B+ u) K h( @7 y& p
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
' z2 } E* \% V$ e, R- O5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
! |+ b- b- Y. _: ?; T8 w$ Y6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
! L1 C; x# M: m* `# s& X- O1 q% v2 o7Kinki University School of Medicine, Osaka 589-8511, Japan
+ {& E8 c9 p+ C' e8Izumi Municipal Hospital, Osaka 594-0071, Japan $ a+ O4 n: z7 e1 d0 u8 T! r
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan ! e* r2 f. `9 g2 X3 W( z3 I
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
" Z$ T+ h8 c& [, m6 r* @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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