Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
& A! B9 |/ ?/ ]2 V! s( mNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 % F4 S5 ]) T7 E5 B4 Q0 r; N$ [9 z
+ Author Affiliations
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/ v0 V1 X+ H2 ~" p- ~) T1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
, i0 A0 B; x% F. X3 q2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 9 K$ N" ^% |: G1 K
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : {( N; y0 O* q% u& x
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
9 E4 V' i5 A" i. n- Y- J- x5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan : `7 o0 `8 d7 y5 }* d
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
- C1 Q; V: t1 d, U5 _7Kinki University School of Medicine, Osaka 589-8511, Japan
5 i" s& N0 S- H) `8Izumi Municipal Hospital, Osaka 594-0071, Japan
/ D) W5 R9 G; o/ O9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
- t7 b0 D4 A @2 e* wCorrespondence 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
! A/ o2 \ ]4 y( Y3 ~% }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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