A Novel Injectable Hydrogel Matrix Loaded With 90Y Microspheres for the Treatment of Solid Tumors

Abstract

Background/Aim: The need to concentrate the anti-tumoral activity of ⁹⁰Y only to the targeted tumor, while minimizing its off-target effects, led to the development of an innovative device (BAT-90) composed of a hydrogel matrix and ⁹⁰Y microspheres. Materials and Methods: This in vivo randomized study was planned to assess the efficacy, safety, and biodistribution of BAT-90 in 46 rabbits implanted with a VX2 tumor. The effects of BAT-90 were compared to those of ⁹⁰Y microspheres and the hydrogel matrix. Results: BAT-90 localized effectively the ⁹⁰Y radiation in the injection site, minimizing dispersion of the microspheres in the target and distant organs of the treated animals. Conclusion: BAT-90 can be administered as an adjuvant treatment to clear surgical margins from any potential minimal residual disease, or as an alternative to other loco-regional treatments for non-resectable tumors.