Anti-tumor and immunomodulatory effect of polymer conjugates based on HPMA carrying gemcitabine

Charles University Faculty of Pharmacy in Hradec Králové Department of Biochemical Sciences Candidate: Bc. Natálie Klusová Supervisor: prof. PharmDr. Martin Beránek, Ph.D. Consultant: RNDr. Milada Šírová, Ph.D. Title of diploma thesis: Anti-tumor and immunomodulatory effect of polymer conjugates based on HPMA carrying gemcitabine The diploma thesis is focused on the anti-tumor and immunomodulatory effect of polymer conjugates based on HPMA carrying gemcitabine (Gem). We investigated the effects of four polymer conjugates (P-Gem1-P-Gem4), which had similar molecular weight and carried approximately the same amount of the drug. The only difference were the used spacers for Gem linkage. We used the following spacers: β-Alanin (P-Gem1); glycyl-phenylalanyl- leucyl-glycyl (P-Gem2); aminocaproic acid (P-Gem3); valeric acid (P-Gem4). Based on the assessed IC50 values for tumor cell lines 4T1, LL2, Panc02, MiaPaca2 and Panc1 the samples were divided into two groups: a) samples with quick rate of Gem release (P- Gem1, P-Gem2); b) samples with slow rate of Gem release (P-Gem3, P-Gem4). The in vivo stability of the conjugate affects systemic toxicity and anti-tumor activity, which was proven by the experiment performed on BALB/c mice bearing murine mammary carcinoma cells (4T1). We enrolled significant..