Calcium carbonate microparticles containing a photosensitizer photosens: Preparation, ultrasound stimulated dye release, and in vivo application

• Published in: Nanotechnologies in Russia Vol. 9; no. 7-8; pp. 398 - 409
• Main Authors: Svenskaya, Yu. I., Navolokin, N. A., Bucharskaya, A. B., Terentyuk, G. S., Kuz’mina, A. O., Burashnikova, M. M., Maslyakova, G. N., Lukyanets, E. A., Gorin, D. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.07.2014
• Subjects: Chemistry and Materials Science; Industrial and Production Engineering; Machines; Manufacturing; Materials Science; Nanotechnology; Processes; Calcium Carbonate; Photodynamic Therapy; Vaterite; Physiological Solution; Cavitation Bubble
• ISSN: 1995-0780; 1995-0799
• DOI: 10.1134/S1995078014040181

Calcium carbonate microparticles with a size of 0.9 ± 0.2 μm containing a photosensitizer Photosens in a concentration of 2.0 ± 0.2 wt % were prepared by ultrasound-stimulated coprecipitation (20 kHz, 1W/cm 2 ). It is shown that the encapsulated photosensitizer can be released by ultrasonic irradiation (0.89MHz, 1 W/cm 2 , 5 min) as a result of the destruction and recrystallization of calcium carbonate micro-particles. It is established that the combined ultrasonic (0.89 MHz, 1 W/cm 2 ) and light (670 nm, 10 mW/cm 2 ) in vivo influence on the transferred PC-1 strain tumors of rat liver containing intratumorally injected micro-containers with a photosensitizer gives rise to dystrophic changes in tumor cells and to the appearance of extensive necrotic centers, pointing to the presence of the evident destructive effect. Such microcontainers are proposed for use in treating external tumors or tumors accessible for ultrasonic and optical irradiation.