alexa Deletions of NF1 gene and exons detected by multiplex ligation-dependent probe amplification.
Genetics & Molecular Biology

Genetics & Molecular Biology

Hereditary Genetics: Current Research

Author(s): De Luca A, Bottillo I, Dasdia MC, Morella A, Lanari V,

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Abstract To estimate the contribution of single and multi-exon NF1 gene copy-number changes to the NF1 mutation spectrum, we analysed a series of 201 Italian patients with neurofibromatosis type 1 (NF1). Of these, 138 had previously been found, using denaturing high-performance liquid chromatography or protein truncation test, to be heterozygous for intragenic NF1 point mutations/deletions/insertions, and were excluded from this analysis. The remaining 63 patients were analysed using multiplex ligation-dependent probe amplification (MLPA), which allows detection of deletions or duplications encompassing >or=1 NF1 exons, as well as entire gene deletions. MLPA results were validated using real-time quantitative PCR (qPCR) or fluorescent in situ hybridisation. MLPA screening followed by real-time qPCR detected a total of 23 deletions. Of these deletions, six were single exon, eight were multi-exon, and nine were of the entire NF1 gene. In our series, deletions encompassing >or=1 NF1 exons accounted for approximately 7\% (14/201) of the NF1 gene mutation spectrum, suggesting that screening for these should now be systematically included in genetic testing of patients with NF1.
This article was published in J Med Genet and referenced in Hereditary Genetics: Current Research

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