Extracellular matrix metalloproteinase inducer (EMMPRIN) and matrix metalloproteinases (MMPs) as regulators of tumor-host interaction in a spontaneous metastasis model in rats.

DONADÌO AC; REMEDI MM; SUSPERREGUY S; FREDE S; GILARDONI MB; TANG Y; PELLIZAS CG; YANG L

Springer

Año: 2008 vol. 130 p. 1155 - 1155

MMPRIN has a role in invasion and metastasis through the induction of MMPs and the consequent modulation of cell-substrate and cell–cell adhesion processes. The present study evaluates the expression of EMMPRIN protein and MMP-2/9 activity in tumor and parenchymal cells in a spontaneous metastasis model in rats. Moreover, we explore the regulation of EMMPRIN and MMP-9 by tumor-epithelial cell interactions in vitro. By zymography, we observed an increased proMMP-9 expression in both metastasized liver and spleen samples from tumor bearing rats. Immunohistochemical studies showed EMMPRIN-positive tumor cells in tumor biopsies as well as in spleen and liver samples from tumor bearing rats. Interestingly, a signiWcant increase in EMMPRIN expression in hepatic cells was also detected. The regulation of EMMPRIN expression in tumor and liver cells in response to tumor–host interaction was investigated in vitro through a tumor cell line culture on extracellular matrix (ECM) mol