Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
# o' [# t2 R# O* e% W/ X+ PNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 x# ^' ~7 D& W
+ Author Affiliations% I8 B5 n, V A) R# L" s
, f6 x, i& [) `& x. t, ], o$ U6 [1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan : q+ l% I: l9 n ?6 b
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan # E" |! j* U4 {
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
2 @; | e1 c u; z: @2 t4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 5 ~# Q. L# {) g* C' `
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 2 \0 r+ V! J( a" @( ~* T+ j
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 4 |; c( j. N1 t$ X' K
7Kinki University School of Medicine, Osaka 589-8511, Japan
3 R2 }* G4 o5 ^* [ |5 r3 T' J8Izumi Municipal Hospital, Osaka 594-0071, Japan
1 ]2 i6 Q9 [+ \. H9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan # \; _ s5 K' O: [% V- T
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 ! F E" C7 d6 T& Z
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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