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No evidence of linkage between 7q33–36 locus (OTSC2) and otosclerosis in seven British Caucasian pedigrees

Published online by Cambridge University Press:  02 October 2007

F Q Alzoubi ,
W R Ollier ,
R T Ramsden  and
S R Saeed
F Q Alzoubi
Affiliation:
Otolaryngology Department, Jordan University of Science and Technology, Irbid, Jordan
W R Ollier
Affiliation:
Centre for Integrated Genomic Medical Research, University of Manchester
R T Ramsden
Affiliation:
Otolaryngology Department, Central Manchester and Manchester Children's Hospitals NHS Trust and Salford Royal Hospital NHS Trust, Manchester, UK
S R Saeed*
Affiliation:
Otolaryngology Department, Central Manchester and Manchester Children's Hospitals NHS Trust and Salford Royal Hospital NHS Trust, Manchester, UK
*
Address for correspondence: Mr S R Saeed, Consultant ENT and Skull Base Surgeon, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK. E-mail: s.r.saeed@btopenworld.com
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Abstract

Background:

The aetiology of otosclerosis is complex, and probably involves an interaction between genes and environmental factors. Previous studies have revealed genetic linkage with a number of chromosome regions, including position 7q33–36.

Aim:

To confirm whether linkage exists between otosclerosis and chromosome region 7q33–36.

Materials and methods:

Seven multiply affected families were ascertained. Deoxyribonucleic acid from members of these families was extracted, and six markers were genotyped to cover a 16 cM region at 7q33–36. Both parametric and non-parametric multipoint linkage analyses were performed.

Results:

Parametric multipoint linkage analysis excluded any linkage at 7q33–36 (logarithm of odds score <−4.0). Non-parametric linkage analysis also failed to confirm any linkage (non-parametric linkage < 1.66). When tested individually, pedigree four was the only one to show a significant non-parametric linkage score between D7s684 and D7s2513 (non-parametric linkage = 1.96).

Conclusion:

No linkage was detected between otosclerosis and the 7q33–36 region. This could be explained by the study's lack of power, due to the limited number of families available.

Keywords

OtosclerosisGeneticsGenetic LinkageLod ScoreChromosomesHumanPair 7
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 121 , Issue 12 , December 2007 , pp. 1140 - 1147
Copyright
Copyright © JLO (1984) Limited 2007

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