Erschienen in:
01.10.2013 | Original Article
Survivin expression can predict the effect of chemoradiotherapy for advanced lower rectal cancer
verfasst von:
Chie Takasu, Mitsuo Shimada, Nobuhiro Kurita, Takashi Iwata, Hirohiko Sato, Masanori Nishioka, Shinya Morimoto, Kozo Yoshikawa, Tomohiko Miyatani, Hideya Kashihara, Tohru Utsunomiya, Hisanori Uehara
Erschienen in:
International Journal of Clinical Oncology
|
Ausgabe 5/2013
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Abstract
Background
Chemoradiotherapy (CRT) has been used to improve local control and survival in patients with advanced rectal carcinoma. However, a significant proportion of patients show poor response to adjuvant CRT. We thus investigated the usefulness of survivin expression as a predictive marker of the CRT response and its characteristics.
Methods
Forty-three patients with lower rectal cancer who underwent CRT were investigated. All patients received preoperative CRT consisting of TS-1 concurrent with 40 Gy of pelvic irradiation followed by curative resection. The relationship between clinical response, or pathological response, and the expression of survivin of pre-CRT biopsy specimens was evaluated by immunohistochemistry and compared with post-CRT expression.
Results
Positive expression of survivin was observed in 26 of 43 patients (60 %) in pre-CRT specimens. Survivin was positively expressed in 77 % of stable disease cases, and 43 % of partial response (p < 0.05). Regarding the correlation between pathological response and survivin expression, positive expression of survivin was recognized in 75 % (18 of 24) of Grade 0 + 1 cases, 50 % (7 of 14) of Grade 2 cases, and 20 % (1 of 5) of Grade 3 cases. A reverse correlation was recognized between pathological responses and survivin expression (p < 0.05). There were differences in the tumor differentiation between the survivin-positive group and the negative group (p < 0.05). The expression concordance rate was 66 % between pre- and post-CRT tissues. In post-CRT tissues, nuclear survivin expression disappeared completely and cytoplasmic expression increased, especially in responder cases.
Conclusion
Survivin expression in biopsy could be an important predictive factor of preoperative CRT response.