Abstract
Fibrosis of the injured muscles is a problem of recovery from trauma and denervation.
The aim of the work was to investigate the interconnection of matrix metalloproteinase-9
(ММР-9) activity in denervated muscles with fibrosis and to estimate its role in nerve
restoration by the epineurial suture, fibrin-based glue, and polyethylene glycol hydrogel.
The activity of matrix metalloproteinases was estimated by gelatin zymography. Collagen
density in muscles was determined histochemically. An increased level of the active
MMP-9 is associated with the fibrous changes in the denervated skeletal muscles and
after an epineurial suture. The use of fibrin glue and polyethylene glycol hydrogel
resulted in a lower level of collagen and ММР-9 activity, which may be a therapeutic
target in the treatment of neuromuscular lesions, and has value in fibrosis analysis
following microsurgical intervention for peripheral nerve reconstruction.
Keywords
MMP-9 - muscle atrophy - sciatic nerve - trauma - fibrosis