Au Catalyzing Control Release NO in vivo and Tumor Growth-Inhibiting Effect in Chemo-Photothermal Combination Therapy

Abstract

Ying Zhang,1 Tianfu Zhou,1 Jian Li,1 Nuo Xu,1 Mingze Cai,1 Hong Zhang,2 Qinfu Zhao,3 Siling Wang3 1Key Laboratory of TargetDrug Design and Research, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, People’s Republic of China; 2Van ’T Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam, 1098 XH, the Netherlands; 3Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, 110016, People’s Republic of ChinaCorrespondence: Qinfu Zhao; Siling Wang Tel/Fax [phone]Email [email protected]; [email protected]: Aim to obtain a NO donor that can control released NO in vivo with the high efficacy of tumor suppression and targeting, a nanoplatform consisting of FA-Fe3O4@mSiO2-Au/DOX was constructed.Methods: In vitro, the nanoplatform catalyzed NO’s release with the maximum value of 4.91 μM within 60 min at 43°C pH=5.0, which was increased by 1.14 times when the temperature was 37°C. In vivo, 11.7 μg Au in the tumor tissue was found to catalyze S-nitrosoglutathione continuously, and 54 μM NO was checked out in the urine.Results and Discussion: The high concentration of NO was found to increase the apoptotic rate and to reduce tumor proliferation. In the chemo-photothermal combination therapy, the tumor inhibition rate was increased up to 94.3%, and Au’s contribution from catalyzing NO release NO was 8.17%.Keywords: thermotherapy, chemotherapy, NO control release, magnetic mesoporous silica nanocomposites

Keywords

• thermotherapy
• chemotherapy
• no control release
• magnetic mesoporous silica