Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
2 i7 N) p# r$ W$ r: Q F1 SNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
' r- D7 ?: s5 P& F3 h. ^$ k7 N+ Author Affiliations
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. z9 A, m) {9 p1 j2 Z( J' Y6 r1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
6 m6 U- w0 i1 I0 }, T' b/ f% M" w2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan / w8 ~( a- ^$ S5 A, a
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . l' S/ c1 s" X5 d9 l
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
7 q7 v" T, `6 V4 I. _5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ! u \4 t9 N( C# a) I
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
. [, `2 {5 g. g) G6 g! F4 M2 ^$ P7Kinki University School of Medicine, Osaka 589-8511, Japan % \" i6 ~" w7 k e
8Izumi Municipal Hospital, Osaka 594-0071, Japan
! e/ `: K8 I0 ~" h5 u; Z) o9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
! i! O& x" s7 g6 L. w1 q" `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
$ `- }) T6 j7 _. s3 u6 QAbstractBackground: 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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