[New antitumor agent: In vitro activity on breast carcinoma cells].

Previous work showed that established interactions between water-soluble polymers and cell membrane receptors can lead to modulate cell proliferation and differentiation in vitro. These polymers can be considered as bioactive. The aim of this work was to establish the consequences of the interactions between human breast cancer cells MCF7 and polymers of various chemical compositions regarding cell adhesion and proliferation onto tissue culture plate. Water soluble copolymers were synthesized by radical polymerization and are composed of methacrylic acid and sodium styrene sulphonate units. The modulation of the MCF7, biological-induced by these polymers of various compositions, was evaluated. The influence of the polymers chemical composition on the kinetics of cell proliferation, as well as cell morphology and spreading, were studied. A polymer concentration-dependent inhibition effect was observed. One hundred microgram per liter polymers solutions induced strong inhibition of cell proliferation, as well as a change of the MCF7 cells morphology, which can be related to an inhibition of cell spreading. The polymers/MCF7 cells interactions are modulated by the chemical composition of the copolymers and then the respective rate in sulphonate and carboxylate groups distributed along the macromolecular chain.