A method of treating a cancer which is characterized by an up-regulation of expression of lysyl oxidase (LOX) and heat shock protein 70 (HSP70) is disclosed. The method comprises administering to the subject a therapeutically effective amount of a polypeptide comprising a propeptide of lysyl oxidase (LOX), said polypeptide being devoid of LOX catalytic activity, wherein said polypeptide binds to both LOX and heat shock protein 70 (HSP70) with a EC50 of less than 100 nM.