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Published in: Surgery Today 3/2012

01-03-2012 | Original Article

Relationship between expression of apoptosis-related proteins and the efficacy of postoperative chemotherapy in patients with T3 gastric cancer

Authors: Shunichi Tsujitani, Hiroaki Saito, Toshiro Wakatsuki, Masahide Ikeguchi, Ken Shirabe, Masaru Morita, Yoshihiro Kakeji, Tokujiro Yano, Yoshihiko Maehara

Published in: Surgery Today | Issue 3/2012

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Abstract

Purpose

We investigated the relationship between the p53-dependent apoptotic pathway and the survival of patients with gastric cancer, retrospectively, to elucidate new biomarkers of uracil/tegafur (UFT) chemotherapy.

Methods

We examined the expression of p53, p21, Bax, and myeloid cell leukemia 1 (Mcl-1) proteins immunohistochemically in 105 patients who underwent curative gastrectomy for gastric cancer invading the serosa. Postoperative oral UFT was prescribed for 1 year. Kaplan–Meier survival curves were compared with the two-sided log-rank test.

Results

Positive staining for p53, p21, Bax, and Mcl-1 proteins was found in 63.8, 52.4, 39.0, and 72.4% of the subjects, respectively. Survival time did not differ significantly between the patients with and those without p53, p21, and Bax expression. However, patients with Mcl-1(−) tumors survived longer than those with Mcl-1(+) tumors. Postoperative UFT treatment did not improve survival; however, adjuvant UFT significantly prolonged the survival of patients with p53(−), p21(−), Bax(+), or Mcl-1(+) tumors, but not of patients with p53(+), p21(+), Bax(−), or Mcl-1(−) tumors.

Conclusions

The efficacy of adjuvant chemotherapy for gastric cancer may be affected by the status of apoptosis-related proteins such as p53, p21, Bax, and Mcl-1. However, because susceptibility to apoptosis did not explain the sensitivity of chemotherapeutic agents, further investigation of the mutual interaction between apoptosis-related proteins is required.
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Metadata
Title
Relationship between expression of apoptosis-related proteins and the efficacy of postoperative chemotherapy in patients with T3 gastric cancer
Authors
Shunichi Tsujitani
Hiroaki Saito
Toshiro Wakatsuki
Masahide Ikeguchi
Ken Shirabe
Masaru Morita
Yoshihiro Kakeji
Tokujiro Yano
Yoshihiko Maehara
Publication date
01-03-2012
Publisher
Springer-Verlag
Published in
Surgery Today / Issue 3/2012
Print ISSN: 0941-1291
Electronic ISSN: 1436-2813
DOI
https://doi.org/10.1007/s00595-011-0062-z

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