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Pan Afr Med J ; 38: 111, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33912281

RESUMO

Millions of patients, with suspected complex neurogenetic disorders, living in resource limited regions around the world have no access to genetic testing despite the rapidly expanding availability and decreasing costs of genetic testing in first world nations. The barriers to increasing availability of genetic testing in resource limited nations are multifactorial but can be attributed, in large part, to a lack of awareness of the power of genetic testing to lead to a rapid, cost-effective, diagnosis that potentially will have profound clinical implications on treatment and patient outcomes. We report our experience with whole exome sequencing (WES) done for the first time in 5 patients of African descent with a suspected neurogenetic disorder living in a resource limited setting on the Eastern Caribbean island of Barbados. A diagnostic pathogenic mutation was found in 3 patients in the SCN1A, STXBP1 and SCN4A, who clinically were diagnosed with Dravet syndrome, Lennox-Gastaut syndrome, paramytonia and seizures respectively. A variant of undetermined significance was found in a patient with global developmental delays, hypotonia, with abnormal eye movements. In one patient WES was non-diagnostic. This result highlights the high yield of WES in carefully selected patients with a neurologic disease and the need for increase access to genetic testing in resource limited settings globally.


Assuntos
Sequenciamento do Exoma/métodos , Testes Genéticos/métodos , Doenças do Sistema Nervoso/diagnóstico , Adulto , Barbados , Criança , Análise Custo-Benefício , Testes Genéticos/economia , Humanos , Lactente , Proteínas Munc18/genética , Mutação , Canal de Sódio Disparado por Voltagem NAV1.1/genética , Canal de Sódio Disparado por Voltagem NAV1.4/genética , Doenças do Sistema Nervoso/genética , Doenças do Sistema Nervoso/fisiopatologia , Sequenciamento do Exoma/economia , Adulto Jovem
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