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Anion exchanger 2 (AE2), which mediates exchange of Cl(-)/HCO3(-) across the plasma membrane, is widely expressed in body tissues. It is most abundantly expressed in stomach and is responsible for the uptake of Cl(-) ions that are destined to become HCl molecules.

Aim

To determine whether AE2 expression was altered in gastric tumors.

Methods

We have studied AE2 expression in normal human gastric tissues (n =16) and in gastric tumors (n = 33) using immunohistochemistry and immunofluorescent labeling.

Results

In normal gastric tissue positive staining was observed in gastric fundus gland, suggesting parietal cell-related expression of AE2, and AE2 expression was localized in the nuclear membrane and even in cell nuclei. For assay of cancerous gastric tissues, specimens of human gastric cancer arising from the region of the fundus (2 cases), the body (14 cases) and the antrum (17 cases) were randomly selected. Immunohistochemical staining has showed that AE2 was down-regulated in all 14 cancerous gastric body specimens, whereas staining for AE2 in cancerous antrum was less intense and had a diffuse profile.

Conclusions

The data suggest that AE2 might be associated with gastric carcinogenesis and the achlorhydria experienced by gastric cancer patients."xsd:string
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http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/author"Yang Y."xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/author"Zheng L."xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/author"Jin X.L."xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/author"Wu Y.L."xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/author"Fu G.H."xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/author"Shen W.W."xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/author"Wu P.P."xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/author"Fu A.F."xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/date"2008"xsd:gYear
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http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/pages"81-87"xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/title"Expression of anion exchanger 2 in human gastric cancer."xsd:string
http://purl.uniprot.org/citations/18438347http://purl.uniprot.org/core/volume"30"xsd:string
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