Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
1 D4 q0 Y0 G ~8 L" ENOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan - Z7 e+ k3 y7 ^
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
/ i5 c% |) ]& h' o, ~* U3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan $ ?1 f3 J* X+ ^6 H9 |: h
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 3 | L* v$ p2 P/ ^2 O( a
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
# _) [" p$ M: V# d6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
8 m& _, l, k3 \5 B8 z- b7Kinki University School of Medicine, Osaka 589-8511, Japan
7 {% f0 P3 V; B* C6 B3 J8Izumi Municipal Hospital, Osaka 594-0071, Japan
W/ T3 H: Z D- o' m9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan & w( |3 ^% D: ?, H2 @, \1 D y6 z
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 , S: v8 c( H( Z8 F ]
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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