Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type/ v# `: W9 z C8 y8 j% y
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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' W$ \1 l4 ?" E* }1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
* U T& |: T/ K0 i1 o, D2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % W1 q" D9 x. T/ S' o
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) M$ Q" O7 p/ q# h3 ~ w
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 9 N3 B8 N7 t0 f" l. d
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
/ z0 I+ I* C0 W, d0 W4 B6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 1 {- R3 }( F0 u8 X
7Kinki University School of Medicine, Osaka 589-8511, Japan & i) _. s- @5 ]- o, f1 A
8Izumi Municipal Hospital, Osaka 594-0071, Japan . F* I7 E2 }1 Y( q
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
0 l, G7 J' A: g* M6 p) bCorrespondence 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 # i- M1 M! u' _. Z* s
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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