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Vol. 55. Issue 3.
Pages 120-125 (March 2004)
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Vol. 55. Issue 3.
Pages 120-125 (March 2004)
Estudio de una familia con hipoacusia neurosensorial secundaria a la mutación q829x en el gen otof
Evaluation of a family with sensorineural hearing loss due to the q829x mutation in the otof gene
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J. Gallo-Terán*, R. MegÍa López*, C. Morales-Angulo**,a
Corresponding author
cmorales@mundivia.es

Correspondencia: Alto de las Veneras, nº 8. 39478 Puente Arce (Cantabria)
, I. Del Castillo***, M.á. Moreno-Pelayo***, Á. Mazón Gutiérrez*, F. Moreno Herrero***
* Servicio de orl. hospital universitario marqués de valdecilla (SANTANDER)
** Servicio de orl. hospital sierrallana (TORRELAVEGA)
*** Unidad de genética molecular. hospital ramón y cajal (MADRID)
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Resumen
Objetivo

Determinar las características de la hipoacusia secundaria a la mutación Q829X en el gen OTOF, que ha sido descrita como la tercera causa genética más frecuente de hipoacusia prelocutiva en la población española

Material y métodos

Se realizó un estudio clínico y genético de 16 individuos pertenecientes a una familia consanguínea de Cantabria en la que cuatro miembros presentaban hipoacusia

Resultados

Se detectó en homozigosis la mutación Q829X en el gen OTOF en los cuatro individuos que presentaban déficit auditivo. La hipoacusia era neurosensorial, bilateral, simétrica, de intensidad profunda y de comienzo prelocutivo. No se encontraron otras alteraciones asociadas. En los portadores heterozigotos de la mutación la audición era normal

Conclusiones

La mutación Q829X en el gen OTOF produce hipoacusia neurosensorial de intensidad severa-profunda y de inicio prelocutivo. Es importante la detección precoz de individuos afectados portadores de esta mutación, para iniciar un tratamiento lo antes posible

Palabras clave:
Hipoacusia hereditaria
No sindrómica
Otoferlina
OTOF
DFNB9
Abstract
Objetive

To determine the features of hearing loss due to the Q829X mutation in the OTOF gene, the third most frequent mutation causing prelingual deafness reported so far in the Spanish population

Materials and methods

We carried out genetic characterisation of 16 individuals from a consanguineous family from Cantabria, in which 4 members were affected by deafness

Results

All 4 hearing impaired individuals were homozygous for the Q829X mutation in the OTOF gene. The auditory defect was a profound, bilateral, symmetrical, sensorineural hearing loss of prelingual onset. No other clinical alterations were observed. Individuals heterozygous for the Q829X mutation were unaffected

Conclusions

The Q829X mutation in the OTOF gene causes severe to profound sensorineural hearing loss of prelingual onset. Early detection of individuals carrying this mutation is important for the application of palliative treatment and special education

Key words:
Hereditary hearing loss
Non-syndromic
Otoferlin
OTOF
DFNB9

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