Enhanced Reinnervation of the Paralyzed Orbicularis Oculi Muscle after Insulin-like Growth Factor-I (IGF-I) Delivery to a Nerve Graft

Panayotis K. Thanos; David A. Tiangco; Julia K. Terzis

doi:10.1055/s-2001-16028

Journal of Reconstructive Microsurgery, Table of Contents

J Reconstr Microsurg 2001; 17(5): 357-362
DOI: 10.1055/s-2001-16028

IDEAS AND INNOVATIONS

Enhanced Reinnervation of the Paralyzed Orbicularis Oculi Muscle after Insulin-like Growth Factor-I (IGF-I) Delivery to a Nerve Graft

Panayotis K. Thanos¹ ² , David A. Tiangco³ , Julia K. Terzis³

¹Department of Neuroscience, State University of New York at Stony Brook, NY
²Center for Imaging and Neuroscience, Department of Medicine, Brookhaven National Laboratory, Upton, New York
³ Microsurgical Research Center, Department of Surgery, Eastern Virginia Medical School, Norfolk, Virginia

Abstract

ABSTRACT

Facial paralysis (FP) remains today one of the most disturbing cranial nerve disorders. The present study utilized the rat model of FP and examined a dual approach of combining the current microsurgical treatment of cross-facial nerve graft (CFNG) with local administration of insulin-like growth factor-I (IGF-I). The efficacy of this combined treatment approach was assessed by motor end-plate analysis of the reinnervated orbicularis oculi muscle (OOM). Local administration of IGF-I (50 μg/ml) to the CFNG demonstrated a 61 percent increase in the number of end-plates in the reinnervated OOMs, compared to the OOMs reinnervated with CFNG plus vehicle. These results indicate that the local therapeutic augmentation of IGF-I levels at the coaptation site(s) of the CFNG may, in fact, enhance reinnervation of muscle and recovery of function in general.

KEYWORD

Facial paralysis - insulin-like growth factor - cross-facial nerve graft - enhanced reinnervation of orbicularis oculi

Full Text

References

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