Abstract:
BACKGROUND/AIMS:Gastric cancers are characterized by a heterogeneously hypoxic environment. Hypoxia might stimulate the malignant potential of cancer cells. The purpose of our study was to clarify the significance of hypoxia in gastric carcinoma by evaluating the expression of a hypoxic marker, namely carbonic anhydrase-9 (CA-9). METHODS:A total of 265 patients who had undergone a resection of the primary tumor and were confirmed histologically to have sporadic gastric cancer were enrolled in this study. We evaluated the immunohistochemical expression of CA-9 in the paraffin-embedded specimens of 265 gastric adenocarcinomas. RESULTS:The CA-9 expression was positive in 88 (33%) of 265 gastric carcinomas. The CA-9 expression level was significantly high in cases of type 4 carcinoma (60%, p < 0.001) and diffuse type carcinoma (41%, p < 0.001), and significantly correlated with the invasion depth (p < 0.001), lymph node metastasis (p < 0.001) and lymphatic invasion p = 0.002). The prognosis for CA-9-positive patients was significantly poorer than that of CA-9-negative patients (p = 0.003, log-rank). CONCLUSION:Hypoxia might be associated with aggressive tumor phenotypes of gastric carcinomas. The hypoxic marker CA-9 may be a useful prognostic indicator.
journal_name
Digestionjournal_title
Digestionauthors
Kato Y,Yashiro M,Noda S,Kashiwagi S,Matsuoka J,Fuyuhiro Y,Doi Y,Hirakawa Kdoi
10.1159/000297208subject
Has Abstractpub_date
2010-01-01 00:00:00pages
246-51issue
4eissn
0012-2823issn
1421-9867pii
000297208journal_volume
82pub_type
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