Abstract
Objectives: The purpose of this study was to look into the
efficacy of caffeic acid phenethyl ester (CAPE), which we believe may be
therapeutically useful in facial nerve restoration due to its
neuroprotective and antioxidant properties. Materials and
Methods: 20 Sprague Dawley rats were divided randomly into 4 primary
and 2 secondary groups and assigned as control, methylprednisolone,
CAPE, CAPE+methylprednisolone groups and the sham and the trauma groups.
Except for the sham group, all groups had the left facial nerve crushed.
Three weeks after surgery, prospective functional, electrophysiologic,
and histologic recovery was assessed. Results: The CAPE and
CAPE+ methylprednisolone group had similar and more significant recovery
at Nerve Excitability Thresholds at the end of three weeks. In
histopathological evaluation, when the groups were compared in terms of
myelin sheath thickness, vascular congestion and axonal degeneration, it
was observed that only the CAPE+ methylprednisolone group achieved a
significantly faster improvement compared to the control group. Although
there was an earlier improvement in the blink tests in the CAPE and
CAPE+steroid group compared to the methylprednisolone and control
groups, complete recovery was observed in all groups on the 21st day.
Conclusion: The combination of caffeic acid phenethyl ester and
methylprednisolone was found to be efficient in nerve regeneration and
may be a good alternative for lowering the dose of methylprednisolone to
minimize adverse effects. Key Words: Caffeic acid phenetyl
ester, facial nerve, neuroprotective agents, experimental rat model.