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Background

Heat shock proteins (HSPs) play important roles in tumor immunity. The authors prospectively investigated the correlation between the tumor-specific Hsp70 membrane expression as an independent clinicopathological marker and overall survival in tumor entities that differ in their route of metastasis.

Methods

Hsp70 membrane expression was examined by flow cytometry in 58 colon, 19 gastric, 54 lower rectal carcinoma, and 19 squamous cell carcinoma specimens and the corresponding normal tissues at time of first diagnosis. Kaplan-Meier survival curves were analyzed to determine the relation of Hsp70 expression to the patients' prognosis.

Results

An Hsp70 membrane-positive phenotype was found in 40% (colon), 37% (gastric), 43% (lower rectal), and 42% (squamous cell) of the analyzed tumor specimens. None of the corresponding normal tissues was found to be Hsp70 membrane-positive. In patients with colon (P = .032) and gastric (P = .045) carcinomas, an Hsp70 membrane expression correlated significantly with an improved overall survival; a negative association was seen in lower rectal (P = .085) and squamous cell carcinoma (P = .048).

Conclusions

The authors hypothesized that differing relations between surface expression of Hsp70 on tumor cells and clinical outcomes may reflect differences in the route of metastases. Colon and gastric carcinomas metastasize into the liver where hepatic natural killer cells may have the capacity to recognize and kill Hsp70 membrane-positive tumor cells and thus account for a better overall survival."xsd:string
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http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Pfister K."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Pfeifer M."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Busch R."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Radons J."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Tidball J.G."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Milani V."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Multhoff G."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Freitag L."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Feldmann H.J."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/author"Issels R."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/date"2007"xsd:gYear
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/name"Cancer"xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/pages"926-935"xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/title"Patient survival by Hsp70 membrane phenotype: association with different routes of metastasis."xsd:string
http://purl.uniprot.org/citations/17580361http://purl.uniprot.org/core/volume"110"xsd:string
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