Jm. Liu et al., Analysis of the in vitro inhibition of mammary adenocarcinoma cell adhesion by sulphated polysaccharides, ANTICANC R, 20(5A), 2000, pp. 3265-3271
Evidence is mounting that changes in the ability of cancer cells to adhere
to extracellular matrices (ECM) play a decisive role in metastasis spread.
We have investigated the effect of different sulphated polysaccharides on t
he adhesion of MCF7 and MDA-MB231 adenocarcinoma breast cells to different
substrata: a reconstituted basement membrane (Matrigel) and various adhesio
n-mediating proteins (fibronectin, laminin, type IV collagen). Most of them
inhibited cell adhesion and the most active component is a galactose rich
units polysaccharide, carrageenan iota. Taken together, the results suggest
that this inhibitory activity depends on the charge density related to sul
phate groups, the molecular weight and also the carbohydrate structure. The
se products very likely unstabilize the interaction between the glucosamino
glycan portion of proteoglycans and the ECM proteins and then block the abi
lity of these adhesive proteins to bind to cells.