Patent ID: 7090846

Claim:
A method for transporting an enhancer molecule to a tumor cell in a body, comprising: introducing into the body a polycation bioconjugate which comprises one or more carrier molecules having free α-amino groups, and the enhancer molecule, wherein the polycation bioconjugate has the general formula (I) wherein “r” is a mean value between 20 and 400 that designates the number of diaminomonocarbonic acyl group monomers; “m”=0, 1, 2, 3, . . . ; [(k)Mx] designates enhancer molecules linked by covalent (=k) bonds to a carrier molecule; [(i)Mx] designates enhancer molecules linked by ionic (=i) bonds to a carrier molecule, wherein the Mx functional groups may be the same or different, and the enhancer molecules can be linked directly and/or indirectly, through a connecting molecule, to the carrier molecule, and wherein when both [(k)Mx] and [(i)Mx] occur within the same polycation bioconjugate [(i)Mx]*[(k)Mx] is symbolized by [(k/i)Mx]; the carrier molecules are of the same configuration (either D- or L-), and the individual monomers are not linked together by their amino groups in the α-positions, and are linked together by amino groups in other positions according to the value of m, wherein the carrier molecules have a general formula (I/a): and wherein the enhancer molecule is a compound having an affinity to a receptor or molecule characteristic of the tumor cell, wherein the receptor or molecule is present on a surface of the tumor cell.