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Prevention of diabetic neuropathy by regulatable expression of HSV-mediated erythropoietin

Previous studies have demonstrated that gene transfer of genes coding for neurotrophic factors to the dorsal root ganglion (DRG) using nonreplicating herpes simplex virus (HSV)-based vectors injected subcutaneously can prevent the progression of diabetic neuropathy. Because prolonged expression of neurotrophic factors could potentially have unwanted adverse effects, we constructed a nonreplicating HSV vector, vHrtEPO, to express erythropoietin (EPO) under the control of a tetracycline response element (TRE)-minimal cytomegalovirus (CMV) fusion promoter. Primary DRG neurons in culture infected with vHrtEPO express and release EPO in response to exposure to doxycycline (DOX). Animals infected with vHrtEPO by footpad inoculation demonstrated regulated expression of EPO in DRG under the control of DOX administered by gavage. Mice rendered diabetic by injection of streptozotocin (STZ), inoculated with vHrtEPO, and treated with DOX 4 days out of 7 each week for 4 weeks were protected against the development of diabetic neuropathy as assessed by electrophysiologic and behavioral measures. These studies indicate that intermittent expression of EPO in DRG achieved from a regulatable vector is sufficient to protect against the progression of neuropathy in diabetic animals, and provides proof-of-principle preclinical evidence for the development of such vectors for clinical trial

Keywords : adverse effects,Animals,Cells,Cultured,Cercopithecus aethiops,Diabetic Neuropathies,drug effects,Electrophysiology,Enzyme-Linked Immunosorbent Assay,Erythropoietin,Ganglia,Spinal,Genetic Therapy,Genetic Vectors,genetics,Growth,Male,metabolism,methods,Mice,Nerve Growth Factor,Nerve Growth Factors,Neurons,pharmacology,physiology,Polymerase Chain Reaction,Promoter Regions,Genetic,Rats,Simplexvirus,Tetracycline,therapy,Vero Cells,, Diabetic,Neuropathy,By,Regulatable, trigger point injections for shoulder pain

Date of Publication : 2011 Feb

Authors : Wu Z;Mata M;Fink DJ;

Organisation : Department of Neurology, University of Michigan, Ann Arbor, MI, USA

Journal of Publication : Mol Ther

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/20924361

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