Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0036572 (seizures)
 80,221 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Periventricular nodular heterotopia (PNH) is a developmental disorder of the central nervous system, characterized by heterotopic nodules of gray matter resulting from disturbed neuronal migration. The most common form of bilateral PNH is X-linked dominant inherited, caused by mutations in the Filamin A gene (FLNA) and associated with a wide variety of other clinical findings including congenital heart disease. The typical patient with FLNA-associated PNH is female and presents with difficult to treat seizures. In contrast, hemizygous FLNA loss of function mutations in males are reported to be perinatally lethal. In X-linked dominant traits like FLNA-associated PNH the causal mutation is commonly inherited from the mother. Here, we present an exceptional family with paternal transmission of classic bilateral FLNA-associated PNH from a mildly affected father with somatic and germline mosaicism for a c.5686G>A FLNA splice mutation to both daughters with strikingly variable clinical manifestation and PNH extent in cerebral MR imaging. Our observations emphasize the importance to consider in genetic counseling and risk assessment the rare genetic constellation of paternal transmission for families with X-linked dominant inherited FLNA-associated PNH.
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PMID:Paternal inheritance of classic X-linked bilateral periventricular nodular heterotopia. 2363 2

A 15-year-old male patient presented to our outpatient clinic with drug-resistant seizures. Magnetic resonance imaging of the brain showed bilateral posterior nodular heterotopia and left cerebellar dysgenesis. The patient was diagnosed with cortical developmental malformation and medically refractory epilepsy. The filamin A gene mutation was negative. Posterior periventricular nodular heterotopia is a rarer and a more different entity from classical periventricular nodular heterotopia with no gender difference and negative filamin A gene mutation. There is a limited number of case studies on posterior periventricular heterotopia. Therefore, this patient was presented to emphasize that epilepsy may be more refractory to treatment, and central congenital abnormalities including posterior fossa abnormalities are more frequent in patients with posterior periventricular nodular heterotopia.
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PMID:A Rare Cause of Refractory Epilepsy: Posterior Periventricular Nodular Heterotopia. 3027 70

Epilepsy treatments for patients with mechanistic target of rapamycin (mTOR) disorders, such as tuberous sclerosis complex (TSC) or focal cortical dysplasia type II (FCDII), are urgently needed. In these patients, the presence of focal cortical malformations is associated with the occurrence of lifelong epilepsy, leading to severe neurological comorbidities. Here, we show that the expression of the actin cross-linking protein filamin A (FLNA) is increased in resected cortical tissue that is responsible for seizures in patients with FCDII and in mice modeling TSC and FCDII with mutations in phosphoinositide 3-kinase (PI3K)-ras homolog enriched in brain (Rheb) pathway genes. Normalizing FLNA expression in these mice through genetic knockdown limited cell misplacement and neuronal dysmorphogenesis, two hallmarks of focal cortical malformations. In addition, Flna knockdown reduced seizure frequency independently of mTOR signaling. Treating mice with a small molecule targeting FLNA, PTI-125, before the onset of seizures alleviated neuronal abnormalities and reduced seizure frequency compared to vehicle-treated mice. In addition, the treatment was also effective when injected after seizure onset in juvenile and adult mice. These data suggest that targeting FLNA with either short hairpin RNAs or the small molecule PTI-125 might be effective in reducing seizures in patients with TSC and FCDII bearing mutations in PI3K-Rheb pathway genes.
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PMID:Filamin A inhibition reduces seizure activity in a mouse model of focal cortical malformations. 3216 70


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