Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type) n$ q! [0 v/ M/ G' h. k; G
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9 1 e1 a. \, [. `* g c9 k
+ Author Affiliations1 w+ M" r- f$ O7 L9 n, B6 V0 T
: _6 [- z/ H# ]1 d1 I1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan ( R$ c# l! l# j" o
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan : _: G2 l1 j% _, r
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan & @& @4 t0 }# w' |1 b" i/ s
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
! l& `4 c+ K9 e( n! {) p: |( Y/ N1 d6 W5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
- _. R) `6 J" `0 r9 O7 Q6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
6 F; x( n4 O1 E: c i7Kinki University School of Medicine, Osaka 589-8511, Japan , _: [& Z6 k6 p6 ]2 c7 |$ X
8Izumi Municipal Hospital, Osaka 594-0071, Japan
/ z" f, Q$ b5 ~# g o9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
% c% K; B+ ~8 Y2 h3 W5 cCorrespondence 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
' m+ {7 k' I7 S. |1 b6 s# B( EAbstractBackground: 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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