Increased expression of matrix metalloproteinase-9 in patients with temporal lobe epilepsy
G Acar, G Tanriover, F Acar, R Demir - Turkish Neurosurgery, 2015 - gcris.pau.edu.tr
G Acar, G Tanriover, F Acar, R Demir
Turkish Neurosurgery, 2015•gcris.pau.edu.trAim: The molecular mechanism of epileptogenesis in temporal lobe epilepsy is still unclear.
Experimental studies have suggested that matrix metalloproteinases have important roles in
this process, but human studies are limited. The aim of this study was to assess the
expression of MMP-9, MMP-2 and their tissue inhibitors (TIMP-1 and TIMP-2) in patients with
temporal lobe epilepsy with hippocampal sclerosis (TLE-HS). Material and Methods: The
tissue samples from temporal neocortex and hippocampus were obtained from patients with …
Experimental studies have suggested that matrix metalloproteinases have important roles in
this process, but human studies are limited. The aim of this study was to assess the
expression of MMP-9, MMP-2 and their tissue inhibitors (TIMP-1 and TIMP-2) in patients with
temporal lobe epilepsy with hippocampal sclerosis (TLE-HS). Material and Methods: The
tissue samples from temporal neocortex and hippocampus were obtained from patients with …
Aim
The molecular mechanism of epileptogenesis in temporal lobe epilepsy is still unclear. Experimental studies have suggested that matrix metalloproteinases have important roles in this process, but human studies are limited. The aim of this study was to assess the expression of MMP-9, MMP-2 and their tissue inhibitors (TIMP-1 and TIMP-2) in patients with temporal lobe epilepsy with hippocampal sclerosis (TLE-HS).
Material and Methods
The tissue samples from temporal neocortex and hippocampus were obtained from patients with temporal lobe epilepsy with hippocampal sclerosis who had undergone anterior temporal lobectomy for recurrent medically resistant seizures. Immunohistochemical methods were used to determine the expression of MMP-9, MMP-2 and their tissue inhibitors. Tissue samples were also analyzed with transmission electron microscopy.
Results
The immunoreactivity for MMP-9 both in hippocampal and temporal neocortical neurons was stronger than that of MMP-2. Additionally, there was a mild reaction for its tissue inhibitor TIMP-1 as with TIMP-2. The TEM analysis of the hippocampus revealed that there was apparent ultra-structural damage on the pericarya and neuropil of some neurons. There was obvious damage in the mitochondria and the nuclear membrane.
Conclusion
The preliminary results of this study revealed that MMP-9 may have a role in patients with drug resistant TLE-HS.
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