Traditional cancer chemotherapy relies on the premise that rapidly
proliferating cancer cells are more likely to be killed by a cytotoxic
agent. In reality, however, cytotoxic agents have very little or no
specificity, which leads to systemic toxicity, causing severe
undesirable side effects. Therefore, various drug delivery protocols
have been explored. Tumor cells overexpress many receptors and
biomarkers, which can be used as targets to deliver cytotoxic agents
into tumors. In general, a tumor-targeting drug delivery system consists
of a tumor recognition moiety and a cytotoxic warhead connected directly
or through a suitable linker to form a conjugate. This book discusses
the design and development of a novel series of the second-generation
taxoid conjugates with ω-3 polyunsaturated fatty acids; and a new class
of disulfide-containing linkers for tumor-targeting prodrugs. This book
should help shed some light on the exciting research of directing
therapeutics to tumors, and should be especially useful to professionals
in anticancer drug discovery and delivery fields.