International Journal of Nanomedicine (Dec 2016)
Dynamic imaging of allogeneic adipose-derived regenerative cells transplanted in ischemic hind limb of apolipoprotein E mouse model
Abstract
Yi Zheng,1,* Jinbao Qin,2,* Xin Wang,2,* Zhiyou Peng,2 Peiyong Hou,1 Xinwu Lu2,3 1Department of General Surgery, The Fourth Affiliated Hospital of Guangxi Medical University, Guangxi, 2Department of Vascular Surgery, School of Medicine, Shanghai Ninth People’s Hospital Affiliated to Shanghai JiaoTong University, 3Vascular Center of Shanghai JiaoTong University, Shanghai, People’s Republic of China*These authors contributed equally to this work Background: Transplantation of allogeneic adipose-derived regenerative cells (ADRCs) is a promising treatment modality for severe ischemic diseases. However, minimal information is available on the in vivo effects, fate, and migration of ADRCs, as well as the mechanisms of their therapeutic angiogenesis.Materials and methods: In this study, green fluorescent protein-expressing ADRCs (GFP-ADRCs) were obtained, labeled with acetylated 3-aminopropyltrimethoxysilane (APTS)-coated iron oxide nanoparticles (APTS NPs), and injected into an old apolipoprotein E knockout (ApoE-KO) mouse model with hind limb ischemia. Then, 3.0 T magnetic resonance imaging (MRI) was performed to dynamically trace the role of ADRCs targeting hind limb ischemia in the ApoE-KO mice model.Results: Labeled cells were visualized as large hypointense spots in ischemic muscles by serial 3.0 T MRI scans during a 4-week follow-up. The presence of labeled GFP-ADRCs was confirmed by Prussian blue staining and fluorescence microscopy on postmortem specimens.Conclusion: This study showed that allogeneic ADRCs offer great potential application for therapeutic angiogenesis in severe ischemic disease based on the efficacy and feasibility of ADRC transplantation and on the available amounts of tissue. Keywords: allogeneic adipose-derived stem cells, cell tracking, APTS nanoparticles, hind limb ischemia, ApoE knockout mouse
