Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type/ l+ a* N( Q" M% }+ u7 Q* e
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 6 S7 n7 b% k% E' [% i
+ Author Affiliations& j- L$ n6 L5 {4 v& F
c' [3 ]) d* k. o* S& b1 q! c1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan . }3 _, j/ F \4 A- y
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
0 Y4 f' D! x1 X9 x. U1 C3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : [9 x7 e. O6 \
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
5 }# u, j. u' u8 F, ~: Y: j5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
- S. D* b# s& E6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ; q: l) c. L3 ?# N8 U; Y: S! W
7Kinki University School of Medicine, Osaka 589-8511, Japan ; |' e% T4 b" z& j
8Izumi Municipal Hospital, Osaka 594-0071, Japan
& N$ ~) P: Y. W9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
7 l. M9 G- q5 }0 gCorrespondence 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
& G& H# |9 f) m) i- x) yAbstractBackground: 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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