ArticleAmerican journal of translational research2025
Low expression of polo-like kinase 2 predicts high postoperative seizure recurrence in glioma-related epilepsy.
Article in American journal of translational research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveTo investigate the association between tumor expression of polo-like kinase 2 (PLK2) and postoperative seizure recurrence in glioma-related epilepsy (GRE) patients, and to explore mechanisms related to synaptic function and inflammation.
methodsWe retrospectively analyzed a cohort of 189 adult patients with supratentorial glioma and preoperative seizures. Among them, 98 were classified as PLK2-low and 91 as PLK2-high based on the histoscore. PLK2 expression in tumor tissues was quantified using immunohistochemistry (IHC) and quantitative real-time PCR (qRT-PCR), while serum PLK2 levels were measured by enzyme-linked immunosorbent assay (ELISA). Interictal discharges, residual tumor volume, peritumoral metabolism, synaptic protein expression, and cytokine profiles were also assessed. Cox regression analysis was conducted to identify independent predictors of postoperative seizure recurrence.
resultsTumors with low PLK2 expression exhibited significantly reduced IHC H-scores, protein and mRNA levels, and serum concentrations (all P < 0.05). Patients in the PLK2-low group showed higher interictal spike rates, larger residual tumor volume, and elevated peritumoral standardized uptake values (all P < 0.05). Expression of synaptic markers PSD-95 and synaptophysin was decreased, while levels of interleukin-1β, tumor necrosis factor-α, and interleukin-6 were significantly elevated (all P < 0.05). Postoperative seizure recurrence was more frequent in the PLK2-low group, and low PLK2 expression remained an independent predictor in multivariable Cox regression analysis.
conclusionLow PLK2 expression is strongly associated with postoperative seizure recurrence, synaptic dysfunction, and neuroinflammation, suggesting its use as a predictive biomarker and therapeutic target in GRE.
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