التفاصيل البيبلوغرافية
| العنوان: |
Further genotype – phenotype correlations in neurofibromatosis 2. |
| المؤلفون: |
Selvanathan, S. K., Shenton, A., Ferner, R., Wallace, A. J., Huson, S. M., Ramsden, R. T., Evans, D. G. |
| المصدر: |
Clinical Genetics; Feb2010, Vol. 77 Issue 2, p163-170, 8p, 7 Charts, 2 Graphs |
| مصطلحات موضوعية: |
NEUROFIBROMATOSIS, GENOTYPE-environment interaction, NERVOUS system tumors, TUMOR genetics, HEARING disorders, DIAGNOSIS, MEDICAL genetics |
| مستخلص: |
Selvanathan SK, Shenton A, Ferner R, Wallace AJ, Huson SM, Ramsden RT, Evans DG. Further genotype–phenotype correlations in neurofibromatosis 2. Neurofibromatosis 2 (NF2) is caused by mutations in the NF2 gene predisposing carriers to develop nervous system tumours. Different NF2 mutations result in either loss/reduced protein function or gain of protein function (abnormally behaving mutant allele i.e. truncated protein potentially causing dominant negative effect). We present a comparison between the clinical presentations of patients with mutations that are predicted to produce truncated protein (nonsense/frameshift mutations) to those that results in loss of protein expression (large deletions) to elucidate further genotype–phenotype correlations in NF2. Patients with nonsense/frameshift mutations have a younger age of diagnosis and a higher prevalence/proportion of meningiomas (p = 0.002, p = 0.014), spinal tumours (p = 0.004, p = 0.004) and non-VIII cranial nerve tumours (p = 0.006, p = 0.003). We also found younger age of diagnosis of vestibular schwannomas (p = 0.007), higher mean numbers of cutaneous lesions (p = 0.003) and spinal tumours (p = 0.006) in these patients. With respect to NF2 symptoms, we found younger age of onset of hearing loss (p = 0.010), tinnitus (p = 0.002), paraesthesiae (p = 0.073), wasting and weakness (p = 0.001) and headaches (p = 0.049) in patients with nonsense/frameshift mutations. Our comparison shows, additional, new correlations between mutations in the NF2 gene and the NF2 disease phenotype, and this further confirms that nonsense/frameshift mutations are associated with more severe NF2 symptoms. Therefore patients with this class of NF2 mutation should be followed up closely. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
