The present invention relates to a
saponin derivative based on a
saponin, the
saponin derivative comprising a
triterpenoid aglycone and a first
sugar chain and / or a second
sugar chain, and comprising: an
aglycone core structure comprising an
aldehyde group which has been derivatized; and / or a first
sugar chain, wherein the first sugar chain comprises a carboxyl group which has been derivatized; and / or a second sugar chain, wherein the second sugar chain comprises at least one
acetoxy group which has been derivatized. The present invention further relates to a first pharmaceutical composition comprising the saponin derivative of the present invention. Furthermore, the present invention relates to a pharmaceutical combination comprising the first pharmaceutical composition of the present invention and a second pharmaceutical composition comprising any one or more of an
antibody-
toxin conjugate, a
receptor-ligand-
toxin conjugate, an
antibody-
drug conjugate, a
receptor-ligand-
drug conjugate, an
antibody-
oligonucleotide conjugate, or a
receptor-ligand-
oligonucleotide conjugate. The present invention further relates to the first pharmaceutical composition or the pharmaceutical combination of the present invention for use as a medicament or for use in the treatment or prevention of
cancer, an infectious
disease, a
viral infection, hypercholesterolemia, primary hyperoxaluria, hemophilia A, hemophilia B, alpha-1 antitrypsin-related
liver disease, acute hepatic porphyria,
transthyretin-mediated
amyloidosis, or an
autoimmune disease. Furthermore, the present invention relates to an
in vitro or
ex vivo method for transferring a molecule from the outside of a
cell to the inside of said
cell, comprising contacting said
cell with said molecule and the saponin derivative of the present invention.