TY - JOUR
T1 - Fibrin gels entrapment of a doxorubicin-containing targeted polycyclodextrin
T2 - Evaluation of in vivo antitumor activity in orthotopic models of human neuroblastoma
AU - Viale, Maurizio
AU - Vecchio, Graziella
AU - Maric, Irena
AU - Cilli, Michele
AU - Aprile, Anna
AU - Ponzoni, Mirco
AU - Fontana, Vincenzo
AU - Priori, Erica C.
AU - Bertone, Vittorio
AU - Rocco, Mattia
PY - 2019/12/15
Y1 - 2019/12/15
N2 - In vivo local antitumor activity of fibrin gels (FBGs) loaded with the poly-cyclodextrin oCD-NH2/Dox, compared to free Dox, was evaluated in two mouse orthotopic neuroblastoma (NB) models, after positioning of the releasing devices in the visceral space. FBGs were prepared at the fibrinogen (FG) concentrations of 22 and 40 mg/ml clotted in the presence of 0.81 mM/mg FG Ca2+ and 1.32 U/mg FG thrombin. Our results indicate that FBGs loaded with oCD-NH2/Dox and applied as neoadjuvant loco-regional treatment, show an antitumor activity significantly greater than that displayed by the same FBGs loaded with identical dose of Dox or after free Dox administered intra venous (iv). In particular, FBGs prepared at 40 mg/ml showed a slightly lower antitumor activity, although after their positioning we observed a significant initial reduction of tumor burden lasting for several days after gel implantation. FBGs at 22 mg/ml loaded with oCD-NH2/Dox and applied after tumor removal (adjuvant treatment model) showed a significantly better antitumor activity than the iv administration of free Dox, with 90% tumor regrowth reduction compared to untreated controls. In all cases the weight loss post-treatment was limited after gel application, although in the adjuvant treatment the loss of body weight lasted longer than in the other treatment modality. In accordance with our recent published data on the low local toxic effects of FBGs, the present findings also underline an increase of the therapeutic index of Dox when locally administered through FBGs loaded with the oCD-NH2/Dox complex.
AB - In vivo local antitumor activity of fibrin gels (FBGs) loaded with the poly-cyclodextrin oCD-NH2/Dox, compared to free Dox, was evaluated in two mouse orthotopic neuroblastoma (NB) models, after positioning of the releasing devices in the visceral space. FBGs were prepared at the fibrinogen (FG) concentrations of 22 and 40 mg/ml clotted in the presence of 0.81 mM/mg FG Ca2+ and 1.32 U/mg FG thrombin. Our results indicate that FBGs loaded with oCD-NH2/Dox and applied as neoadjuvant loco-regional treatment, show an antitumor activity significantly greater than that displayed by the same FBGs loaded with identical dose of Dox or after free Dox administered intra venous (iv). In particular, FBGs prepared at 40 mg/ml showed a slightly lower antitumor activity, although after their positioning we observed a significant initial reduction of tumor burden lasting for several days after gel implantation. FBGs at 22 mg/ml loaded with oCD-NH2/Dox and applied after tumor removal (adjuvant treatment model) showed a significantly better antitumor activity than the iv administration of free Dox, with 90% tumor regrowth reduction compared to untreated controls. In all cases the weight loss post-treatment was limited after gel application, although in the adjuvant treatment the loss of body weight lasted longer than in the other treatment modality. In accordance with our recent published data on the low local toxic effects of FBGs, the present findings also underline an increase of the therapeutic index of Dox when locally administered through FBGs loaded with the oCD-NH2/Dox complex.
KW - Activity in vivo
KW - Cyclodextrin polymer
KW - Doxorubicin
KW - Fibrin gel
KW - Neuroblastoma
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U2 - 10.1016/j.taap.2019.114811
DO - 10.1016/j.taap.2019.114811
M3 - Article
C2 - 31705944
AN - SCOPUS:85074723490
VL - 385
JO - Toxicology and Applied Pharmacology
JF - Toxicology and Applied Pharmacology
SN - 0041-008X
M1 - 114811
ER -