Abstract: The present disclosure relates to a functionalized statistic chitosan of weight average molecular mass between 100 kDa and 1000 kDa and of formula (I): wherein each Rc is independently a moiety comprising a chelating agent, each Z is independently a linker which is a single bond or a hydrocarbon chain containing between 1 and 12 carbon atoms, said hydrocarbon chain is linear or branched and optionally contains one or more unsaturations and one or more heteroatoms, x is between 0.005 and 0.7, preferably between 0.05 and 0.7, y is between 0.01 and 0.7, preferably between 0.05 and 0.2, the ratio y/x being greater than or equal to 0.05, preferably greater than or equal to 0.15, and the sum x+y being greater than or equal to 0.15, for use in the treatment of diseases characterized by local inflammation induced by and/or inducing a deregulation of metal homeostasis and increased oxidative stress, in a subject in need thereof.

Abstract: A pharmaceutical formulation of a pharmaceutically active protein including an effective amount of a protein or a combination of proteins, a chitosan A and at least one statistic polysaccharide B. Also, a kit including the at least one first container containing the chitosan A and the statistic polysaccharide B and at least one second container containing the protein or combination of proteins. Further, the pharmaceutical formulation or the kit for use in the treatment of cancer, typically breast or gastric cancer.