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Somatic Mosaicism in PIK3CA Variant Correlates With Stereoelectroencephalography-Derived Electrophysiology.
Phillips, H Westley; D'Gama, Alissa M; Wang, Yilan; Chahine, Yasmine; Chiu, Michelle; Swanson, Amanda C; Ahtam, Banu; Bolton, Jeffrey B; Madsen, Joseph R; Lee, Eunjung A; Prabhu, Sanjay P; Lidov, Hart G; Papadakis, Joanna; Huang, August Y; Poduri, Annapurna; Stone, Scellig S; Walsh, Christopher A.
Afiliación
  • Phillips HW; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • D'Gama AM; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Wang Y; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Chahine Y; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Chiu M; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Swanson AC; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Ahtam B; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Bolton JB; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Madsen JR; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Lee EA; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Prabhu SP; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Lidov HG; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Papadakis J; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Huang AY; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Poduri A; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Stone SS; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
  • Walsh CA; From the Department of Neurosurgery (H.W.P.), Stanford School of Medicine, Palo Alto, CA; Department of Neurosurgery (H.W.P., J.R.M., J.P., S.S.S.), Boston Children's Hospital, Harvard Medical School; Broad Institute of MIT and Harvard (H.W.P., Y.W., Y.C., E.A.L., A.Y.H., C.A.W.), Cambridge; Divisio
Neurol Genet ; 10(1): e200117, 2024 Feb.
Article en En | MEDLINE | ID: mdl-38149038
ABSTRACT

Objectives:

Brain-limited pathogenic somatic variants are associated with focal pediatric epilepsy, but reliance on resected brain tissue samples has limited our ability to correlate epileptiform activity with abnormal molecular pathology. We aimed to identify the pathogenic variant and map variant allele fractions (VAFs) across an abnormal region of epileptogenic brain in a patient who underwent stereoelectroencephalography (sEEG) and subsequent motor-sparing left frontal disconnection.

Methods:

We extracted genomic DNA from peripheral blood, brain tissue resected from peri-sEEG electrode regions, and microbulk brain tissue adherent to sEEG electrodes. Samples were mapped based on an anatomic relationship with the presumed seizure onset zone (SOZ). We performed deep panel sequencing of amplified and unamplified DNA to identify pathogenic variants with subsequent orthogonal validation.

Results:

We detect a pathogenic somatic PIK3CA variant, c.1624G>A (p.E542K), in the brain tissue samples, with VAF inversely correlated with distance from the SOZ. In addition, we identify this variant in amplified electrode-derived samples, albeit with lower VAFs.

Discussion:

We demonstrate regional mosaicism across epileptogenic tissue, suggesting a correlation between variant burden and SOZ. We also validate a pathogenic variant from individual amplified sEEG electrode-derived brain specimens, although further optimization of techniques is required.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Neurol Genet Año: 2024 Tipo del documento: Article
Texto completo
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Neurol Genet Año: 2024 Tipo del documento: Article