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- Title
Synaptic Vesicle Protein 2A Expression in Glutamatergic Terminals Is Associated with the Response to Levetiracetam Treatment.
- Authors
Contreras-García, Itzel Jatziri; Gómez-Lira, Gisela; Phillips-Farfán, Bryan Víctor; Pichardo-Macías, Luz Adriana; García-Cruz, Mercedes Edna; Chávez-Pacheco, Juan Luis; Mendoza-Torreblanca, Julieta G.
- Abstract
Synaptic vesicle protein 2A (SV2A), the target of the antiepileptic drug levetiracetam (LEV), is expressed ubiquitously in all synaptic terminals. Its levels decrease in patients and animal models of epilepsy. Thus, changes in SV2A expression could be a critical factor in the response to LEV. Epilepsy is characterized by an imbalance between excitation and inhibition, hence SV2A levels in particular terminals could also influence the LEV response. SV2A expression was analyzed in the epileptic hippocampus of rats which responded or not to LEV, to clarify if changes in SV2A alone or together with glutamatergic or GABAergic markers may predict LEV resistance. Wistar rats were administered saline (control) or pilocarpine to induce epilepsy. These groups were subdivided into untreated or LEV-treated groups. All epileptic rats were video-monitored to assess their number of seizures. Epileptic rats with an important seizure reduction (>50%) were classified as responders. SV2A, vesicular γ-aminobutyric acid transporter and vesicular glutamate transporter (VGLUT) expression were assessed by immunostaining. SV2A expression was not modified during epilepsy. However, responders showed ≈55% SV2A-VGLUT co-expression in comparison with the non-responder group (≈40%). Thus, SV2A expression in glutamatergic terminals may be important for the response to LEV treatment.
- Subjects
SYNAPTIC vesicles; LEVETIRACETAM; LABORATORY rats; PROTEIN expression; GLUTAMATE transporters
- Publication
Brain Sciences (2076-3425), 2021, Vol 11, Issue 5, p531
- ISSN
2076-3425
- Publication type
Article
- DOI
10.3390/brainsci11050531