Expression of TRPC3 in cortical lesions from patients with focal cortical dysplasia
Chao Liang1, Xin Chen2, Chun-Qing Zhang1
1Epilepsy Research Center of PLA, Department of Neurosurgery, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, 400037, PR China.
Abstract:
Focal cortical dysplasia (FCD) is one of the main causes of medically intractable epilepsy. Some studies have reported that transient receptor potential canonical channel 3 (TRPC3) may play an important role in the occurrence of seizures. In this study, we investigated the expression patterns of TRPC3 in different types of FCD. Forty-five FCD specimens and 12 control samples from autopsies were used in our study. Western blotting, immunohistochemistry, and immunofluorescence staining were employed to detect protein expression and distribution. The amount of TRPC3 protein was markedly elevated in the FCD group. The immunohistochemistry results revealed that TRPC3 staining was strong in the malformed cells and microcolumns. Most of the TRPC3-positive cells were colabeled with glutamatergic and GABAergic markers. The overexpression and altered cellular distribution of TRPC3 in the FCD samples suggest that TRPC3 may be related to epileptogenesis in FCD.
Insights
Transient receptor potential canonical channel 3 (TRPC3) is overexpressed in focal cortical dysplasia (FCD), a cause of intractable epilepsy. This suggests TRPC3 may contribute to seizure development in FCD patients.
Area of Science:
- Neuroscience
- Molecular Biology
- Epilepsy Research
Background:
- Focal cortical dysplasia (FCD) is a primary cause of medically intractable epilepsy.
- Transient receptor potential canonical channel 3 (TRPC3) has been implicated in seizure occurrence.
Purpose of the Study:
- To investigate the expression patterns of TRPC3 in different types of FCD.
- To determine the cellular distribution of TRPC3 in FCD specimens.
Main Methods:
- Western blotting to quantify TRPC3 protein levels.
- Immunohistochemistry and immunofluorescence staining to visualize TRPC3 distribution.
- Analysis of 45 FCD specimens and 12 autopsy control samples.
Main Results:
- TRPC3 protein levels were significantly elevated in FCD samples compared to controls.
- TRPC3 staining was prominent in malformed cells and microcolumns within FCD tissues.
- TRPC3-positive cells frequently co-expressed glutamatergic and GABAergic markers.
Conclusions:
- Overexpression and altered cellular localization of TRPC3 in FCD suggest its potential role in epileptogenesis.
- TRPC3 may be a contributing factor to seizure generation in focal cortical dysplasia.
