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Inicio Medicina Clínica (English Edition) Mutational screening in genes related with porto-pulmonary hypertension: An anal...
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Vol. 148. Issue 7.
Pages 310-313 (April 2017)
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Vol. 148. Issue 7.
Pages 310-313 (April 2017)
Clinical report
Mutational screening in genes related with porto-pulmonary hypertension: An analysis of 6 cases
Cribado mutacional en genes relacionados con la hipertensión portopulmonar: análisis de 6 casos
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Guillermo Pousadaa,b,c, Adolfo Baloirad, Diana Valverdea,b,
Corresponding author
dianaval@uvigo.es

Corresponding author.
a Departamento de Bioquímica, Genética e Inmunología, Facultad de Biología, Universidad de Vigo, Vigo, Pontevedra, Spain
b Instituto de Investigación Sanitaria Galicia Sur (IIS-Galicia Sur), Pontevedra, Spain
c Centro de Investigaciones Biomédicas (CINBIO), Pontevedra, Spain
d Servicio de Neumología, Complexo Hospitalario Universitario de Pontevedra, Pontevedra, Spain
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Table 1. Clinical and hemodynamic characteristics in patients with portopulmonary hypertension.
Table 2. Molecular characterization of key genes in patients with portopulmonary hypertension.
Table 3. Molecular characterization of genetic modifiers in portopulmonary hypertension patients.
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Abstract
Introduction

Portopulmonary hypertension (PPH) is a rare disease with a low incidence and without a clearly-identified genetic component. The aim of this work was to check genes and genetic modifiers related to pulmonary arterial hypertension in patients with PPH in order to clarify the molecular basis of the pathology.

Patients

We selected a total of 6 patients with PPH and amplified the exonic regions and intronic flanking regions of the relevant genes and regions of interest of the genetic modifiers.

Results

Six patients diagnosed with PPH were analyzed and compared to 55 healthy individuals. Potentially-pathogenic mutations were identified in the analyzed genes of 5 patients. None of these mutations, which are highly conserved throughout evolution, were detected in the control patients nor different databases analyzed (1000 Genomes, ExAC and DECIPHER). After analyzing for genetic modifiers, we found different variations that could favor the onset of the disease.

Conclusions

The genetic analysis carried out in this small cohort of patients with PPH revealed a large number of mutations, with the ENG gene showing the greatest mutational frequency.

Keywords:
Pulmonary arterial hypertension
Porto-pulmonary hypertension
Mutations
Genetic analysis
Genetic modifiers
Resumen
Introducción

La hipertensión portopulmonar (HPP) es una enfermedad rara de baja incidencia y sin una alteración genética claramente identificada. El principal objetivo de este estudio fue analizar los genes y modificadores genéticos relacionados con la hipertensión arterial pulmonar en pacientes con HPP.

Pacientes

Se seleccionaron 6 pacientes diagnosticados de HPP y se amplificaron las regiones exónicas y sus límites intrónicos de los genes y la región de interés en los modificadores genéticos.

Resultados

Se analizaron 6 pacientes diagnosticados de HPP y se compararon con 55 individuos sanos. Se identificaron mutaciones potencialmente patogénicas en 5 pacientes en alguno de los genes analizados. Ninguna de estas mutaciones, que se encuentran altamente conservadas a lo largo de la evolución, fue detectada en los controles analizados ni en las diferentes bases de datos consultadas (1000 Genomas, ExAC y DECIPHER). Tras el análisis de los modificadores genéticos encontramos diferentes variaciones que podrían favorecer el desarrollo de la enfermedad.

Conclusiones

El análisis genético en esta pequeña serie de pacientes con HPP ha mostrado un elevado número de mutaciones, siendo el gen ENG el que muestra una mayor frecuencia mutacional.

Palabras clave:
Hipertensión arterial pulmonar
Hipertensión portopulmonar
Mutaciones
Estudio genético
Modificadores genéticos

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