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• W1950899894 abstract "Axonal outgrowth during peripheral nerve regeneration relies on the ability of growth cones to traverse through an environment that has been altered structurally and along a basal lamina sheath to reinnervate synaptic targets. To promote migration, growth cones secrete proteases that are thought to dissolve cell-cell and cell-matrix adhesions. These proteases include the plasminogen activators (PAs), tissue PA (tPA) and urokinase PA (uPA), and their substrate, plasminogen. PA expression and secretion are upregulated in regenerating mammalian sensory neurons in culture. After sciatic nerve crush in mice, there was an induction of PA mRNAs in the sensory neurons contributing to the crushed nerve and an upregulation of PA-dependent activity in crushed nerve compared with sham counterparts during nerve regeneration. To further assess the role of the PA system during peripheral nerve regeneration, PA-dependent activity as well as recovery of sensory and motor function in the injured hindlimb were assessed in wild-type, tPA, uPA, and plasminogen knock-out mice. Protease activity visualized by gel zymography showed that after nerve crush, the upregulation of PA activity in the tPA and uPA knock-out mice was delayed compared with wild-type mice. Recovery of sensory function was assessed by toe pinch, footpad prick, and the toe-spreading reflex. All knock-out mice demonstrated a significant delay in hindlimb response to these sensory stimuli compared with wild-type mice. For each modality tested, the uPA knock-out mice were the most dramatically affected, showing the longest delay to initiate a response. These studies clearly showed that PAs were necessary for timely functional recovery by regenerating peripheral nerves." @default.
• W1950899894 created "2016-06-24" @default.
• W1950899894 creator A5046683620 @default.
• W1950899894 creator A5063058067 @default.
• W1950899894 date "2001-06-15" @default.
• W1950899894 modified "2023-10-15" @default.
• W1950899894 title "Mice Lacking tPA, uPA, or Plasminogen Genes Showed Delayed Functional Recovery after Sciatic Nerve Crush" @default.
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• W1950899894 doi "https://doi.org/10.1523/jneurosci.21-12-04348.2001" @default.
• W1950899894 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6762762" @default.
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