Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type5 `; B- g" J- m4 c) B1 |0 T- d, x
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
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: ]- j' k* P% F) Z1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
+ P3 [' \4 @ J2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ) U4 L: z" ]: l5 ^0 e' y E, P: s
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 5 S L! |" b+ C3 D6 f$ p
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
" o- j1 H' U1 M1 b5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan / S) _$ A- y0 Q! h1 C! ?& S
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan 7 H' e$ _2 ?( [3 J% P1 M1 {
7Kinki University School of Medicine, Osaka 589-8511, Japan 3 C3 _) j' H$ n0 O, I
8Izumi Municipal Hospital, Osaka 594-0071, Japan
' Z7 r7 Z$ p9 M9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
5 U( |5 K# y$ }7 Q0 X3 `, l( `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 , ~3 ^8 A t0 ~! A5 Y: r7 f
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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