Enhanced VEGF Production and Decreased Immunogenicity Induced by TGF-beta 1 Promote Liver Metastasis of Pancreatic Cancer

Overview

Journal Br J Cancer

Specialty Oncology

Date 2001 Aug 17

PMID 11506504

Citations 24

Authors

H Teraoka

T Sawada

T Nishihara

M Yashiro

M Ohira

T Ishikawa

H Nishino

K Hirakawa

Affiliations

Soon will be listed here.

Abstract

TGF-betas are multifunctional polypeptides that regulate cell growth and differentiation, extracellular matrix deposition, cellular adhesion properties, angiogenesis and immune functions. In this study, we investigated the effect of TGF-beta1 on liver metastasis and its mechanism by using human pancreatic cancer cell lines Panc-1, Capan-2, and SW1990. Capan-2 and SW1990 cells demonstrated enhanced liver metastatic potential by in vivo splenic injection with TGF-beta1. Consequently, we examined the role of TGF-beta1 on in vitro angiogenesis and received cytotoxicity by peripheral blood mononuclear leukocytes (PBMLs). While TGF-beta1 slightly decreased cell proliferation, it also upregulated VEGF production in all cancer cells examined. The binding of PBMLs to cancer cells and cancer cell cytotoxicity during co-culture with PBMLs were remarkably decreased by treatment with TGF-beta1. Panc-1 cells revealed no liver metastasis despite their high immunogenetic and angiogenetic abilities, which was attributed to a lack of expression of the cell surface carbohydrates that induce attachment to endothelial cells. We concluded that the presence of TGF-beta1 in the microenvironment of tumour site might play an important role in enhancing liver metastasis of pancreatic cancer by modulating the capacity of angiogenesis and immunogenicity.

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