Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type4 Z5 [* {8 s$ q3 @: C5 ?1 [+ B
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 3 C1 u- P- M2 `/ d/ V/ v
+ Author Affiliations2 W3 b: j, a; }' V6 z6 T/ d, w
$ N$ m7 d9 O6 q+ C& X5 E1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
, i% J; T2 G" B4 s$ [0 }2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ! F% j# E8 e- k2 w5 b
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , f5 r7 q7 J4 z- N
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan " W2 b: y( I6 X7 D1 i8 v9 R0 c
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
- Q* r5 W$ J3 o- q+ o' U6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
" S9 }3 n$ h9 F$ r3 e+ Z7Kinki University School of Medicine, Osaka 589-8511, Japan y% O/ r9 \+ I# @' ?6 b
8Izumi Municipal Hospital, Osaka 594-0071, Japan * C- d, N U1 J1 q- `9 ^) f
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
, i0 w T- X! CCorrespondence 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
& f6 s# X4 I& H& E: z0 Y {# kAbstractBackground: 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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