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2018 ; 8
(1
): 8316
Nephropedia Template TP
Sci Rep
2018[May]; 8
(1
): 8316
PMID29844434
show ga
During the peripheral nerve regeneration process, a variety of neurotrophic
factors play roles in nerve repair by acting on neuronal or non-neuronal cells.
In this report, we investigated the role(s) of hepatocyte growth factor (HGF) and
its receptor, c-met, in peripheral nerve regeneration. When mice were subjected
to sciatic nerve injury, the HGF protein level was highly increased at the
injured and distal sites. The level of both total and phosphorylated c-met was
also highly upregulated, but almost exclusively in Schwann cells (SCs) distal
from the injury site. When mice were treated with a c-met inhibitor, PHA-665752,
myelin thickness and axon regrowth were decreased indicating that re-myelination
was hindered. HGF promoted the migration and proliferation of cultured SCs, and
also induced the expression of various genes such as GDNF and LIF, presumably by
activating ERK pathways. Furthermore, exogenous supply of HGF around the injury
site, by intramuscular injection of a plasmid DNA expressing human HGF, enhanced
the myelin thickness and axon diameter in injured nerves. Taken together, our
results indicate that HGF and c-met play important roles in Schwann cell-mediated
nerve repair, and also that HGF gene transfer may provide a useful tool for
treating peripheral neuropathy.