Auditory function associated with Col11a1 haploinsufficiency in chondrodysplasia ( cho) mice
Heterozygosity for mutations in the fibrillar collagen gene COL11A1 causes sensorineural hearing loss in patients with Stickler syndrome or Marshall syndrome. Chondrodysplasia ( cho) is a functional null allele of Col11a1 that causes lethal chondrodysplasia in cho/ cho newborn mice, and osteoarthrit...
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Veröffentlicht in: | Hearing research 2003, Vol.175 (1), p.178-182 |
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Sprache: | eng |
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Zusammenfassung: | Heterozygosity for mutations in the fibrillar collagen gene
COL11A1 causes sensorineural hearing loss in patients with Stickler syndrome or Marshall syndrome. Chondrodysplasia (
cho) is a functional null allele of
Col11a1 that causes lethal chondrodysplasia in
cho/
cho newborn mice, and osteoarthritis in
cho/+ heterozygotes. To determine if
Col11a1 haploinsufficiency causes hearing loss in
cho/+ mice, auditory brainstem response (ABR) thresholds were measured at 2, 4, 6, 8 and 10 months of age. There was no difference in ABR thresholds for click and tone burst stimuli between
cho/+ and +/+ mice at all ages. In contrast to the conclusion of a previous report, our results indicate that
Col11a1 haploinsufficiency does not cause significant hearing loss on the C57BL/6 strain background. We conclude that Stickler syndrome and Marshall syndrome mutations in
COL11A1 cause hearing loss via dominant negative effects upon wild-type fibrillar collagen polypeptides in the extracellular matrices of the cochlea. |
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ISSN: | 0378-5955 1878-5891 |
DOI: | 10.1016/S0378-5955(02)00736-0 |