Drugs usually have no natural affinity for the cells, tissues and organs where therapeutic effects are needed, which frequently results in low efficiency and unwanted side effects. This concern is even more profound when using highly potent and cytotoxic anticancer drugs or specific agents, such as enzymes and genetic materials, since their effective and safe action requires precise cellular or even sub-cellular addressing in the target organ. To meet safety, efficiency and specificity requirements, drugs somehow must be targeted to the sites of their expected therapeutic action. The idea of...

Drugs usually have no natural affinity for the cells, tissues and organs where therapeutic effects are needed, which frequently results in low efficiency and unwanted side effects. This concern is even more profound when using highly potent and cytotoxic anticancer drugs or specific agents, such as enzymes and genetic materials, since their effective and safe action requires precise cellular or even sub-cellular addressing in the target organ. To meet safety, efficiency and specificity requirements, drugs somehow must be targeted to the sites of their expected therapeutic action. The idea of...