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Lack of correlation between the type of COL1A1 or COL1A2 mutation and hearing loss in osteogenesis imperfecta patients.
Hum Mutat. 2004 Aug; 24(2):147-54.HM

Abstract

Osteogenesis imperfecta (OI) is caused by mutations in COL1A1 and COL1A2 that code for the alpha1 and alpha2 chains of type I collagen. Phenotypes correlate with the mutation types in that COL1A1 null mutations lead to OI type I, and structural mutations in alpha1(I) or alpha2(I) lead to more severe OI types (II-IV). However, correlative analysis between mutation types and OI associated hearing loss has not been previously performed. A total of 54 Finnish OI patients with previously diagnosed hearing loss or age 35 or more years were analyzed here for mutations in COL1A1 or COL1A2. Altogether 49 mutations were identified, of which 41 were novel. The 49 mutations represented the molecular genetic background of 41.1% of the Finnish OI population. A total of 38 mutations were in COL1A1 and 11 were in COL1A2. Of these, 16 were glycine substitutions and 16 were splicing mutations in alpha1(I) or alpha2(I). In addition, 17 null allele mutations were detected in COL1A1. A total of 32 patients (65.3%) with a mutation had hearing loss. That is slightly more than in our previous population study on Finnish adults with OI (57.9%). The association between the mutation types and OI type was statistically evident. Patients with COL1A1 mutations more frequently had blue scleras than those with COL1A2 mutations. In addition, patients with COL1A2 mutations tended to be shorter than those with COL1A1 mutations. However, no correlation was found between the mutated gene or mutation type and hearing pattern. These results suggest that the basis of hearing loss in OI is complex, and it is a result of multifactorial, still unknown genetic effects.

Authors+Show Affiliations

Collagen Research Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology, Oulu University Hospital, Finland.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15241796

Citation

Hartikka, Heini, et al. "Lack of Correlation Between the Type of COL1A1 or COL1A2 Mutation and Hearing Loss in Osteogenesis Imperfecta Patients." Human Mutation, vol. 24, no. 2, 2004, pp. 147-54.
Hartikka H, Kuurila K, Körkkö J, et al. Lack of correlation between the type of COL1A1 or COL1A2 mutation and hearing loss in osteogenesis imperfecta patients. Hum Mutat. 2004;24(2):147-54.
Hartikka, H., Kuurila, K., Körkkö, J., Kaitila, I., Grénman, R., Pynnönen, S., Hyland, J. C., & Ala-Kokko, L. (2004). Lack of correlation between the type of COL1A1 or COL1A2 mutation and hearing loss in osteogenesis imperfecta patients. Human Mutation, 24(2), 147-54.
Hartikka H, et al. Lack of Correlation Between the Type of COL1A1 or COL1A2 Mutation and Hearing Loss in Osteogenesis Imperfecta Patients. Hum Mutat. 2004;24(2):147-54. PubMed PMID: 15241796.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Lack of correlation between the type of COL1A1 or COL1A2 mutation and hearing loss in osteogenesis imperfecta patients. AU - Hartikka,Heini, AU - Kuurila,Kaija, AU - Körkkö,Jarmo, AU - Kaitila,Ilkka, AU - Grénman,Reidar, AU - Pynnönen,Seppo, AU - Hyland,James C, AU - Ala-Kokko,Leena, PY - 2004/7/9/pubmed PY - 2004/10/27/medline PY - 2004/7/9/entrez SP - 147 EP - 54 JF - Human mutation JO - Hum Mutat VL - 24 IS - 2 N2 - Osteogenesis imperfecta (OI) is caused by mutations in COL1A1 and COL1A2 that code for the alpha1 and alpha2 chains of type I collagen. Phenotypes correlate with the mutation types in that COL1A1 null mutations lead to OI type I, and structural mutations in alpha1(I) or alpha2(I) lead to more severe OI types (II-IV). However, correlative analysis between mutation types and OI associated hearing loss has not been previously performed. A total of 54 Finnish OI patients with previously diagnosed hearing loss or age 35 or more years were analyzed here for mutations in COL1A1 or COL1A2. Altogether 49 mutations were identified, of which 41 were novel. The 49 mutations represented the molecular genetic background of 41.1% of the Finnish OI population. A total of 38 mutations were in COL1A1 and 11 were in COL1A2. Of these, 16 were glycine substitutions and 16 were splicing mutations in alpha1(I) or alpha2(I). In addition, 17 null allele mutations were detected in COL1A1. A total of 32 patients (65.3%) with a mutation had hearing loss. That is slightly more than in our previous population study on Finnish adults with OI (57.9%). The association between the mutation types and OI type was statistically evident. Patients with COL1A1 mutations more frequently had blue scleras than those with COL1A2 mutations. In addition, patients with COL1A2 mutations tended to be shorter than those with COL1A1 mutations. However, no correlation was found between the mutated gene or mutation type and hearing pattern. These results suggest that the basis of hearing loss in OI is complex, and it is a result of multifactorial, still unknown genetic effects. SN - 1098-1004 UR - https://www.unboundmedicine.com/medline/citation/15241796/Lack_of_correlation_between_the_type_of_COL1A1_or_COL1A2_mutation_and_hearing_loss_in_osteogenesis_imperfecta_patients_ L2 - https://doi.org/10.1002/humu.20071 DB - PRIME DP - Unbound Medicine ER -