Design, synthesis and biological evaluation of bioconjugates for selective drug delivery and tumour targeting
Abstract
Chemotherapy is still one of the primary modalities for the treatment of cancer. However, the application of free anticancer drugs has several drawbacks due to the high toxicity, the lack of selectivity and the low bioavailability. The main objective of the current PhD thesis was to improve the activity mainly of antiproliferative drugs but also of other drugs and bioactive compounds. To achieve this, two axes were followed:a) Design, synthesis and biological evaluation of bioconjugates for selective drug delivery and tumour targeting: Two antiproliferative drugs were studied gemcitabine and sunitinib. Selective drug delivery was achieved by the conjugation of these drugs to gonadotropin-releasing hormone (GnRH) peptide in order to target the GnRH receptor, which is found to over express in different tumor cells. First the chemistry of drug-peptide conjugation was studied and more specific the oxime bonds, the carboxylic acid ester bonds and the carbamate bonds in chemical linkers. The ...
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