Soluble poly (amido-amines) useful as promoters of cell adhesion, proliferation and differentiation

Use of sol. polyamidoamines having a mol. wt. comprised from about 3.000 Da to about 120.000 Da, more preferably from about 5.000 Da to about 40.000 Da, to promote adhesion, growth and differentiation of cultured cell lines and primary cell cultures on cell-growth supporting substrates.