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Title

IGF-I deficiency and hearing loss: molecular clues and clinical implications

AuthorsVarela-Nieto, Isabel ; Murillo-Cuesta, Silvia ; Rodriguez-de la Rosa, Lourdes ; Lassaletta, Luis ; Contreras, Julio
Issue Date2013
PublisherYS Medical Media
CitationPediatric Endocrinology Reviews 10(4): 460-472 (2013)
AbstractSensorineural hearing loss is a clinical heterogeneous disorder and a significant health-care problem with tremendous socio-economic impact. According to WHO, >Over 5% of the world's population has disabling hearing loss -328 million adults and 32 million children->. In children, early hearing loss affects language acquisition. Hearing deficits are generally associated with the loss of the sensory >hair> cells and/or neurons caused by primary genetic defects or secondary to environmental factors including infections, noise and ototoxic drugs. Hearing loss cannot be reversed and currently the available treatment is limited to hearing aids and cochlear implants. Studies are being conducted to develop alternative treatments combining both preventive and reparative strategies. Human insulin like growth factor (IGF) I deficiency is a rare disease associated with hearing loss, poor growth rates and mental retardation (ORPHA73272, OMIM608747). Similarly, lgf1-/- mice are dwarfs with poor survival rates and congenital profound sensorineural deafness. IGF-I is known to be a neuroprotective agent that maintains cellular metabolism, activates growth, proliferation and differentiation, and limits cell death. Here we will discuss the basic mechanisms underlying IGF-I actions in the auditory system and their clinical implications to pursue novel treatments to ameliorate hearing loss.
URIhttp://hdl.handle.net/10261/123916
Identifiersissn: 1565-4753
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