Elevated serum CRP levels after induction chemoradiotherapy reflect poor treatment response in association with IL-6 in serum and local tumor site in patients with advanced esophageal cancer

Background and Objectives Elevated serum CRP levels are associated with tumor progression and poor prognosis of esophageal cancer. The aim of this study was to clarify the clinical significance of CRP in relation to response to chemoradiotherapy in patients with esophageal cancer. Methods The relati...

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Published in:Journal of surgical oncology 2011-01, Vol.103 (1), p.62-68
Main Authors: Fujiwara, Hitoshi, Suchi, Kentaro, Okamura, Shinichi, Okamura, Hiroko, Umehara, Seiji, Todo, Momoko, Shiozaki, Atsushi, Kubota, Takeshi, Ichikawa, Daisuke, Okamoto, Kazuma, Ochiai, Toshiya, Kokuba, Yukihito, Sonoyama, Teruhisa, Otsuji, Eigo
Format: Article
Language:English
Subjects:
Aged
Biomarkers, Tumor - blood
Biomarkers, Tumor - metabolism
C-Reactive Protein - metabolism
Carcinoma, Squamous Cell - drug therapy
Carcinoma, Squamous Cell - metabolism
Carcinoma, Squamous Cell - pathology
Carcinoma, Squamous Cell - radiotherapy
chemoradiation response
Combined Modality Therapy - methods
CRP
Disease Progression
Esophageal Neoplasms - drug therapy
Esophageal Neoplasms - metabolism
Esophageal Neoplasms - pathology
Esophageal Neoplasms - radiotherapy
esophageal squamous cell carcinoma
Female
Humans
IL-6
Interleukin-6 - blood
Interleukin-6 - metabolism
Male
Middle Aged
Prognosis
Treatment Outcome
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Summary:Background and Objectives Elevated serum CRP levels are associated with tumor progression and poor prognosis of esophageal cancer. The aim of this study was to clarify the clinical significance of CRP in relation to response to chemoradiotherapy in patients with esophageal cancer. Methods The relationship between serum CRP levels and response to chemoradiotherapy and prognosis was analyzed in 34 patients with advanced esophageal squamous cell carcinoma who underwent induction chemoradiotherapy followed by surgery. The relationship between response to chemoradiotherapy and interleukin‐6 (IL‐6) expression in sera and tumor tissues was also analyzed. Results Although elevated serum CRP levels were associated with poor response to chemoradiotherapy, significant difference in CRP levels between pathological responders (n = 18) and non‐responders (n = 16) was observed after chemoradiotherapy, but not before. Patients with elevated CRP levels had shorter cause‐specific survival, but significant difference was observed only after chemoradiotherapy. In addition, serum levels of IL‐6 were also associated with poor treatment response following chemoradiotherapy and were correlated with residual tumor volume. IL‐6 expression was detected in residual tumor tissues by immunohistochemistry. Conclusions Elevated serum CRP levels after chemoradiotherapy may predict poor response to chemoradiotherapy more accurately than before chemoradiotherapy, and IL‐6 may be a possible target associated with chemoradiotherapy resistance. J. Surg. Oncol. 2011;103:62–68. © 2010 Wiley‐Liss, Inc.
ISSN:0022-4790
1096-9098
DOI:10.1002/jso.21751