PET monitoring angiogenesis of infarcted myocardium after treatment with vascular endothelial growth factor and bone marrow mesenchymal stem cells

被引：16
作者：
Cai, Mengting [1 ]
Ren, Lei [1 ]
Yin, Xiaoqin [1 ]
Guo, Zhide [2 ]
Li, Yesen [2 ]
He, Tingting [1 ]
Tang, Yongxiang [1 ]
Long, Tingting [1 ]
Liu, Yutao [1 ]
Liu, Gang [2 ]
Zhang, Xianzhong [2 ]
Hu, Shuo [1 ]
机构：
[1] Cent S Univ, Xiangya Hosp, PET Ctr, Changsha, Hunan, Peoples R China
[2] Xiamen Univ, State Key Lab Mol Vaccinol & Mol Diagnost, Ctr Mol Imaging & Translat Med, Sch Publ Hlth, Xiamen, Fujian, Peoples R China
来源：
AMINO ACIDS | 2016年 / 48卷 / 03期
基金：
中国国家自然科学基金;
关键词：
PET; Myocardial perfusion imaging; Myocardial infarction; Angiogenesis; VEGF; Mesenchymal stem cell; Integrin alpha(v)beta(3); ALPHA(V)BETA(3) INTEGRIN EXPRESSION; VEGF GENE; THERAPY; DISEASE; MODEL; PEPTIDES;
D O I：
10.1007/s00726-015-2129-4
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Angiogenesis is a key factor for post-ischemic repair of the infarcted myocardium. This study aims to monitor angiogenesis of infarcted myocardium with a positron emission tomography (PET) imaging agent, F-18-alfatide II (F-18-AlF-NOTA-E[PEG(4)-c(RGDfk)](2)), targeting alpha(v)beta(3) integrin after treatment with vascular endothelial growth factor (VEGF) gene and/or bone marrow mesenchymal stem cells (BMSCs). Sprague-Dawley (SD) rats underwent left coronary artery ligation and were randomly divided into four groups: normal saline control, Ad-VEGF, BMSCs, and Ad-VEGF + BMSCs (n = 4/group). The induced myocardial infarction (MI) was confirmed by electrocardiogram (ECG) with ST-segment elevation, and Tc-99m-MIBI SPECT imaging showing defected myocardial perfusion. Alfatide II PET was performed to monitor angiogenesis at different time points after the therapy. The ratios of Alfatide II tracer uptake in the infarcted myocardium to normal myocardium in all four groups were analyzed. The PET results were validated by ex vivo tissue biodistribution, autoradiography, and immunofluorescence staining. At 1 week after therapy, elevated RGD peptide tracer uptake at the infarcted myocardium was observed in all four groups. The infarct to normal heart ratio of Alfatide II tracer for the three treatment groups was significantly higher than that of the control group (3.94 +/- A 0.20 for VEGF group, 3.77 +/- A 0.16 for BMSCs group and 4.86 +/- A 0.08 for the combination group vs. 3.01 +/- A 0.03 for the control group, P < 0.005, P < 0.005, P < 0.0001, respectively). The combination treatment group demonstrated higher contrast than the two single treatment groups. Similar results were also observed at 4 weeks after treatment. Autoradiography showed similar trend to that of PET results. Immunohistochemical staining showed expression of VEGF protein and the presence of adenovirus in the myocardium. The patterns of vascular density and integrin alpha(v)beta(3) expression were measured by CD31 and CD61 immunostaining analysis, and were consistent with the PET results. F-18-alfatide II PET could reflect angiogenesis of infarcted myocardium after VEGF gene and BMSCs therapy and further provide a non-invasive way of monitoring therapy response of myocardial infarction.
引用
收藏
页码：811 / 820
页数：10
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