Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type- M, H/ q+ P: n5 m( @0 z& f6 c3 w
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
- a: K4 Z& F7 S* _+ Author Affiliations
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! B w' W* V6 \; \! ?" x& X1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ! K# B Y7 n3 Z+ M
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
7 [# }* G0 n- Q% `6 y3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : k% K9 i n: z( B/ Y6 j. N5 ?; Q
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan . t7 S) y1 M/ c
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 5 W- h4 B: C. N, x
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
* r6 x x* v6 H: |7Kinki University School of Medicine, Osaka 589-8511, Japan
9 @( O8 B! s* p3 G: E$ ^8Izumi Municipal Hospital, Osaka 594-0071, Japan
/ g7 j4 k4 [& f! y% Q$ q G9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan . y: h2 r t% N P) k
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
( u7 }1 M- B9 l# c8 fAbstractBackground: 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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