The present invention provides methods of treatment of patients suffering from the complication of blood sugar disorders diabetic peripheral neuropathy and diabetic nephropathy by administration of IGF-1 via protein therapy or gene therapy It relates to methods of treating an individual having a diabetic disorder or a hyperglycemic disorder, comppsing administepng to the individual an effective amount of a DNA vector expressing IGF-1Eb or IGF-1Ec in vivo or an effective amount of the IGF-1Eb or IGF-1Ec protein in the early hyperalgesia stage or in patient that have advanced to the hyposensitivity stage
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