Novel CCM1 (KRIT1) Mutation Detection in Brazilian Familial Cerebral Cavernous Malformation: Different Genetic Variants in Inflammation, Oxidative Stress, and Drug Metabolism Genes Affect Disease Aggressiveness.

Autor: Fontes-Dantas FL; Translational Neuroscience Laboratory (LabNet), Post-Graduation Program in Neurology, Universidade Federal do Estado do Rio de Janeiro, UNIRIO, Rio de Janeiro, Rio de Janeiro, Brazil., da Fontoura Galvão G; Department of Neurosurgery, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil., Veloso da Silva E; Translational Neuroscience Laboratory (LabNet), Post-Graduation Program in Neurology, Universidade Federal do Estado do Rio de Janeiro, UNIRIO, Rio de Janeiro, Rio de Janeiro, Brazil., Alves-Leon S; Translational Neuroscience Laboratory (LabNet), Post-Graduation Program in Neurology, Universidade Federal do Estado do Rio de Janeiro, UNIRIO, Rio de Janeiro, Rio de Janeiro, Brazil., Cecília da Silva Rêgo C; Translational Neuroscience Laboratory (LabNet), Post-Graduation Program in Neurology, Universidade Federal do Estado do Rio de Janeiro, UNIRIO, Rio de Janeiro, Rio de Janeiro, Brazil., Garcia DG; Translational Neuroscience Laboratory (LabNet), Post-Graduation Program in Neurology, Universidade Federal do Estado do Rio de Janeiro, UNIRIO, Rio de Janeiro, Rio de Janeiro, Brazil., Marques SA; Department of Cellular and Molecular Biology, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil., Blanco Martinez AM; Neurodegeneration and Repair Lab oratory, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil., Reis da Silva M; Department of Neurosurgery, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil., Marcondes de Souza J; Department of Neurosurgery, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil. Electronic address: jormarcondes@gmail.com.
Jazyk: angličtina
Zdroj: World neurosurgery [World Neurosurg] 2020 Jun; Vol. 138, pp. 535-540.e8. Date of Electronic Publication: 2020 Feb 28.
DOI: 10.1016/j.wneu.2020.02.119
Abstrakt: Background: Cerebral cavernous malformations (CCMs) are vascular capillary anomalies with a dysfunctional endothelial adherent junction profile, depicting hemorrhage and epilepsy as the main clinical features. With the advent of an increasingly personalized medicine, better comprehension of genetic mechanisms behind CCM represents an important key in the management of the patients and risk rating in relatives. In this context, genetic factors that might influence clinical expressiveness of CCM need to be identified.
Case Description: A 33-year-old woman harboring multiple CCM lesions with a CCM1 mutational profile already being treated conservatively for a right mesial temporal lobe CCM presented with refractory seizures. Magnetic resonance imaging showed no bleeding in the lesion, and the patient was submitted to complete resection of the CCM. Histopathology of the CCM samples depicted an extensive inflammatory reaction and colocalization of CD20+ and CD68+ cells. Genetic analyses of the patient and her mother demonstrated a novel CCM1 (KRIT1) frameshift mutation (c.1661_1662insT; p.Leu554PhefsTer14). Furthermore, variants in CD14 (rs778588), TLR-4 (rs10759930), SOD2 (rs4880), APEX1 (rs1130409), and OGG1 (rs1052133), known as polymorphisms related to disease aggressiveness, were detected in the patient and not in her oligosymptomatic mother harboring the same CCM1 mutation.
Conclusions: Heterogeneity of clinical manifestations among individuals with familial CCM with the same genotype adds mechanistic involvement of modifier factors as phenotypic markers. We describe a novel CCM1/KRIT1 familial mutation in which the coexistence of genetic variants in inflammation and oxidative stress may be related to variable expressiveness of the disease.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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