Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
: Q) n- O3 Q2 Z) |; f9 Q% Y- qNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
3 I) e& r$ r5 [6 B& w8 H+ Author Affiliations, V& b% ]9 k0 ~; C' Y! Y( i
5 G0 z9 M* Q' x8 k6 Y1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
- b: h5 s$ n+ t2 j" } X7 i9 I. J2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 1 k, Z1 q/ v* r9 f
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " I/ X$ _0 |! C
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan % B( y. ^# o2 e7 @3 k; }
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
! D h2 B) K& H- L) Y6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 6 Z1 `' J) Y. e6 ?) y7 [% |; c, I, x% ~
7Kinki University School of Medicine, Osaka 589-8511, Japan 4 h: w; u! |+ t0 @
8Izumi Municipal Hospital, Osaka 594-0071, Japan
1 h5 I: n! @5 q$ }5 J6 O5 h4 P6 h- K f9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
3 H5 ^9 ?0 ^9 u6 QCorrespondence 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 0 E7 b( h/ m8 B. n
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. ' f( {1 ]( \7 X3 q' a
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