Profound actions of an agonist of growth hormone releasing hormone on angiogenic therapy by mesenchymal stem cells
| Autor: | Xiangyang Xia, Jian-an Wang, Hong Yu, Keith A. Webster, Quanwei Tao, Kai Lu, Norman L. Block, Andrew V. Schally, Jian Shen, Qiyuan Xu, Yao Liang Tang, Qunchao Ma, Xinyang Hu |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Agonist Male Receptors Neuropeptide STAT3 Transcription Factor medicine.medical_specialty Time Factors medicine.drug_class Cell Survival Active Transport Cell Nucleus Neovascularization Physiologic Antigens CD34 Apoptosis 030204 cardiovascular system & hematology Biology Growth Hormone-Releasing Hormone Mesenchymal Stem Cell Transplantation Article Cell therapy 03 medical and health sciences 0302 clinical medicine Receptors Pituitary Hormone-Regulating Hormone Cell Movement Ischemia Internal medicine medicine Animals Phosphorylation Muscle Skeletal Cells Cultured Cell Proliferation Tube formation Dose-Response Relationship Drug Cell growth Mesenchymal stem cell Mesenchymal Stem Cells Growth hormone–releasing hormone Peptide Fragments Hindlimb Mice Inbred C57BL Platelet Endothelial Cell Adhesion Molecule-1 Disease Models Animal 030104 developmental biology Endocrinology Cancer research Female Cardiology and Cardiovascular Medicine Hormone |
| Popis: | Objective— The efficiency of cell therapy is limited by poor cell survival and engraftment. Here, we studied the effect of the growth hormone–releasing hormone agonist, JI-34, on mesenchymal stem cell (MSC) survival and angiogenic therapy in a mouse model of critical limb ischemia. Approach and Results— Mouse bone marrow–derived MSCs were incubated with or without 10 –8 mol/L JI-34 for 24 hours. MSCs were then exposed to hypoxia and serum deprivation to detect the effect of preconditioning on cell apoptosis, migration, and tube formation. For in vivo tests, critical limb ischemia was induced by femoral artery ligation. After surgery, mice received 50 μL phosphate-buffered saline or with 1×10 6 MSCs or with 1×10 6 JI-34–reconditioned MSCs. Treatment of MSCs with JI-34 improved MSC viability and mobility and markedly enhanced their capability to promote endothelial tube formation in vitro. These effects were paralleled by an increased phosphorylation and nuclear translocation of signal transducer and activator of transcription 3. In vivo, JI-34 pretreatment enhanced the engraftment of MSCs into ischemic hindlimb muscles and augmented reperfusion and limb salvage compared with untreated MSCs. Significantly more vasculature and proliferating CD31 + and CD34 + cells were detected in ischemic muscles that received MSCs treated with JI-34. Conclusions— Our studies demonstrate a novel role for JI-34 to markedly improve therapeutic angiogenesis in hindlimb ischemia by increasing the viability and mobility of MSCs. These findings support additional studies to explore the full potential of growth hormone–releasing hormone agonists to augment cell therapy in the management of ischemia. |
| Databáze: | OpenAIRE |
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