ABSTRACT
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Subject(s)
Humans , Clostridioides difficile/pathogenicity , Clostridium Infections/epidemiology , Hospital Units/statistics & numerical dataSubject(s)
Clostridioides difficile , Clostridium Infections , Cross Infection , Humans , Internal MedicineABSTRACT
Fundamento y objetivo: Los avances en biología molecular han permitido el descubrimiento de nuevos genes implicados en el desarrollo del síndrome de paraganglioma familiar (PGL), entre ellos los que codifican para el complejo succinato deshidrogenasa mitocondrial (SDH). En el presente trabajo describimos el diagnóstico, expresividad clínica y consejo genético en una familia afectada de PGL por una mutación no descrita en SDHB.Pacientes y método: Se llevó a cabo el estudio genético mediante reacción en cadena de la polimerasa y secuenciación del gen SDHB y determinación bioquímica en sangre/orina de 24h de catecolaminas fraccionadas y metanefrinas, así como pruebas de imagen convencionales (tomografía computarizada y resonancia magnética) y funcionales (gammagrafía con 123I-MIBG) en todos los miembros de una familia con PGL. Resultado: La secuenciación del ADN demostró una mutación en heterocigosis no descrita en SDHB (c.287-3C>G intrón3/exón4) en 5 de los sujetos estudiados (71%). La penetrancia calculada de a mutación en los sujetos portadores fue del 40%, con una edad media de 35 años al diagnóstico. Todos los enfermos requirieron tratamiento quirúrgico tras la confirmación analítica y por imagen de la enfermedad activa. Conclusiones: Describimos la patogenicidad, algoritmo diagnóstico, consejo genético y expresividad clínica de una nueva mutación para SDHB (c.287-3C>G) en una familia con PGL (AU)
Background and objective: Advances in molecular biology have discovered new genes involved in the development of familial paraganglioma syndrome (PGL) including those encoding mitochondrial succinate dehydrogenase complex (SDH). We describe the diagnosis, clinical expression and genetic counselling in a family diagnosed of PGL due to a new SDHB mutation. Patients and method: Genetic study by PCR-direct sequencing SDHB gene and biochemical determination in blood/urine fractionated catecholamine 24h, metanephrines and conventional (computed tomography/magnetic resonance imaging) and functional imaging (123I-MIBG) in all members of a family diagnosed of PGL. Result: DNA sequencing showed a non-described SDHB heterozygous mutation (c.287-3C>G intron3/exon4) in 5 of the subjects (71%). The estimated penetrance of the mutation's carriers was 40%, with a mean age of 35 years at diagnosis. All patients with active illness required surgical treatment after imaging and laboratory confirmation. Conclusions: We describe he pathogenicity, diagnostic algorithm, genetic counselling and clinical expression of a new SDHB mutation (c.287-3C>G) in a family diagnosed of PGL (AU)
Subject(s)
Humans , Paraganglioma/genetics , Neoplastic Syndromes, Hereditary/genetics , Pheochromocytoma/genetics , Genetic Predisposition to Disease , Genetic Counseling , Gene Expression/geneticsABSTRACT
BACKGROUND AND OBJECTIVE: Advances in molecular biology have discovered new genes involved in the development of familial paraganglioma syndrome (PGL) including those encoding mitochondrial succinate dehydrogenase complex (SDH). We describe the diagnosis, clinical expression and genetic counselling in a family diagnosed of PGL due to a new SDHB mutation. PATIENTS AND METHOD: Genetic study by PCR-direct sequencing SDHB gene and biochemical determination in blood/urine fractionated catecholamine 24h, metanephrines and conventional (computed tomography/magnetic resonance imaging) and functional imaging ((123)I-MIBG) in all members of a family diagnosed of PGL. RESULT: DNA sequencing showed a non-described SDHB heterozygous mutation (c.287-3C>G intron3/exon4) in 5 of the subjects (71%). The estimated penetrance of the mutation's carriers was 40%, with a mean age of 35 years at diagnosis. All patients with active illness required surgical treatment after imaging and laboratory confirmation. CONCLUSIONS: We describe the pathogenicity, diagnostic algorithm, genetic counselling and clinical expression of a new SDHB mutation (c.287-3C>G) in a family diagnosed of PGL.
