Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type. f9 G$ ~4 { h+ ~
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan & g0 P* W Y* }* o1 _ o
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan , n' t+ H& W% L M+ ~5 y" ^# i6 B
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) N; t; m7 T( ~) C! m6 ]1 c2 _
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
, g# u7 j4 F( l" R5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
( P7 ?% \* J! M: }, e/ H+ a6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
! z4 w" i: r0 E8 K7Kinki University School of Medicine, Osaka 589-8511, Japan
5 L7 o5 }+ T# p% Z9 \+ a7 J8Izumi Municipal Hospital, Osaka 594-0071, Japan
- r2 X E) a$ r7 z+ M2 J9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
: i! T5 M, }. R( n4 J( S& r( X4 ACorrespondence 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
. i+ Y0 y: n, ^; H! vAbstractBackground: 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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