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Journal of Cancer Research and Clinical Oncology

Erschienen in:

01.09.2008 | Original Paper

B7-H1 up-regulated expression in human pancreatic carcinoma tissue associates with tumor progression

verfasst von: Lei Geng, Dongsheng Huang, Junwei Liu, Yigang Qian, Junfang Deng, Donglin Li, Zhenhua Hu, Jian Zhang, Guoping Jiang, Shusen Zheng

Erschienen in: Journal of Cancer Research and Clinical Oncology | Ausgabe 9/2008

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Abstract

Purpose

Aberrant tumor cell B7-H1 expression, a member of B7 family that can predominantly stimulate interleukin 10 (IL-10) products, contributed to the tumor immune evasion and tumor progression. This study was designed to investigate the expression of B7-H1 and IL-10 in normal pancreas tissues and pancreatic carcinoma samples, and to evaluate clinical significance of B7-H1 expression in pancreatic carcinoma.

Methods

First, the B7-H1 and IL-10 expression in 40 pancreatic carcinoma samples and 8 healthy pancreas specimens using reverse transcription-PCR (RT-PCR) and western-blotting was detected. Localization of B7-H1 and IL-10 was confirmed by immunohistochemical (IHC) staining. Next, the association between B7-H1 expression and tumor differentiation and tumor stage was analyzed. Finally, the correlation between tumor-associated B7-H1 and IL-10 was evaluated.

Results

Pancreatic carcinoma samples demonstrated the up-regulated expression of B7-H1 and IL-10 at mRNA and protein level compared with normal pancreas tissues. IHC staining revealed that B7-H1 and IL-10 was almost localized in tumor cells. Analysis of relationship between B7-H1 and tumor clinicopathological characteristics showed that B7-H1 expression was significantly associated with poor tumor differentiation (P < 0.01) and advanced tumor stage (P < 0.01). Meanwhile, tumor-associated B7-H1 expression was also correlated with IL-10 products (P < 0.01, R ² = 0.6985, mRNA level; P < 0.01, R ² = 0.7236, protein level) in tumor cells.

Conclusions

Our findings for the first time demonstrated up-regulated B7-H1 expression in human pancreatic carcinoma tissues, which might play a role in tumor progression and invasiveness. This expression seemed to be related to the ability of B7-H1 to promoting IL-10 secretion.

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Titel: B7-H1 up-regulated expression in human pancreatic carcinoma tissue associates with tumor progression
verfasst von: Lei Geng
Dongsheng Huang
Junwei Liu
Yigang Qian
Junfang Deng
Donglin Li
Zhenhua Hu
Jian Zhang
Guoping Jiang
Shusen Zheng
Publikationsdatum: 01.09.2008
Verlag: Springer-Verlag
Erschienen in: Journal of Cancer Research and Clinical Oncology / Ausgabe 9/2008
Print ISSN: 0171-5216
Elektronische ISSN: 1432-1335
DOI: https://doi.org/10.1007/s00432-008-0364-8

Springer Medizin

B7-H1 up-regulated expression in human pancreatic carcinoma tissue associates with tumor progression