Chlorin e6-loaded goat milk-derived extracellular vesicles for Cerenkov luminescence-induced photodynamic therapy

被引:13
|
作者
Guo, Rong [1 ,2 ,3 ]
Jiang, Dawei [1 ,2 ,3 ]
Gai, Yongkang [1 ,2 ,3 ]
Qian, Ruijie [1 ,2 ,3 ]
Zhu, Ziyang [1 ,2 ,3 ]
Gao, Yu [1 ,2 ,3 ]
Jing, Boping [1 ,2 ,3 ,4 ]
Yang, Biao [1 ,2 ,3 ]
Lan, Xiaoli [1 ,2 ,3 ]
An, Rui [1 ,2 ,3 ]
机构
[1] Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Dept Nucl Med, 1277 Jiefang Ave, Wuhan 430022, Peoples R China
[2] Hubei Key Lab Mol Imaging, Wuhan 430022, Peoples R China
[3] Minist Educ, Key Lab Biol Targeted Therapy, Wuhan 430022, Peoples R China
[4] Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Dept Ultrasound, Wuhan 430022, Peoples R China
基金
中国国家自然科学基金;
关键词
F-18-FDG; Cerenkov luminescence; Extracellular vesicles; Nanomedicine; Photodynamic therapy; DRUG-DELIVERY SYSTEM; CANCER-THERAPY; RADIATION; RADIONUCLIDES; NANOPARTICLES; EXOSOMES; BIOLOGY; LIGHT; POWER;
D O I
10.1007/s00259-022-05978-4
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose Photodynamic therapy (PDT) is a promising cancer treatment strategy with rapid progress in preclinical and clinical settings. However, the limitations in penetration of external light and precise delivery of photosensitizers hamper its clinical translation. As such, the internal light source such as Cerenkov luminescence (CL) from decaying radioisotopes offers new opportunities. Herein, we show that goat milk-derived extracellular vesicles (GEV) can act as a carrier to deliver photosensitizer Chlorin e6 (Ce6) and tumor-avid F-18-FDG can activate CL-induced PDT for precision cancer theranostics. Methods GEV was isolated via differential ultracentrifugation of commercial goat milk and photosensitizer Ce6 was loaded by co-incubation to obtain Ce6@GEV. Tumor uptake of Ce6@GEV was examined using confocal microscopy and flow cytometry. To demonstrate the ability of F-18-FDG to activate photodynamic effects against cancer cells, apoptosis rates were measured using flow cytometry, and the production of O-1(2) was measured by reactive oxygen species (ROS) monitoring kit. Moreover, we used the IVIS device to detect Cherenkov radiation and Cerenkov radiation energy transfer (CRET). For animal experiments, a small-animal IVIS imaging system was used to visualize the accumulation of the GEV drug delivery system in tumors. PET/CT and CL images of the tumor site were performed at 0.5, 1, and 2 h. For in vivo antitumor therapy, changes of tumor volume, survival time, and body weight in six groups of tumor-bearing mice were monitored. Furthermore, the blood sample and organs of interest (heart, liver, spleen, lungs, kidneys, and tumor) were collected for hematological analysis, immunohistochemistry, and H&E staining. Results Confocal microscopy of 4T1 cells incubated with Ce6@GEV for 4 h revealed strong red fluorescence signals in the cytoplasm, which demonstrated that Ce6 loaded in GEV could be efficiently delivered into tumor cells. When Ce6@GEV and F-18-FDG co-existed incubated with 4T1 cells, the cell viability plummeted from more than 88.02 +/- 1.30% to 23.79 +/- 1.59%, indicating excellent CL-induced PDT effects. In vivo fluorescence images showed a peak tumor/liver ratio of 1.36 +/- 0.09 at 24 h after Ce6@GEV injection. For in vivo antitumor therapy, Ce6@GEV + F-18-FDG group had the best tumor inhibition rate (58.02%) compared with the other groups, with the longest survival rate (35 days, 40%). During the whole treatment process, neither blood biochemical analysis nor histological observation revealed vital organ damage, suggesting the biosafety of this treatment strategy. Conclusions The simultaneous accumulation of F-18-FDG and Ce6 in tumor tissues is expected to overcome the deficiency of traditional PDT. This strategy has the potential to extend PDT to a variety of tumors, including metastases, using targeted radiotracers to provide internal excitation of light-responsive therapeutics. We expect that our method will play a critical role in precision treatment of deep solid tumors.
引用
收藏
页码:508 / 524
页数:17
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