Illegitimate splicing of the NF1 gene in healthy individuals mimics mutation-induced splicing alterations in NF1 patients.

Abstract:

:Neurofibromatosis type 1 (NF1) is a common inherited disease affecting one in 3,500 individuals. The mutation rate in the NF1 gene is one of the highest known for human genes. Compared to other methods, the protein truncation test (PTT) and subsequent sequence analysis of cloned cDNA provides improved efficiency in detecting NF1 mutations that are dispersed throughout the gene spanning 350 kb of genomic DNA. Sequencing of cDNA of patients affected with NF1 mutations revealed multiple splicing errors. Since similar missplicings were also found in "aged" blood of healthy individuals, they are most likely attributable to a general decrease in splice site selection in aged blood. We show that restoring viability of lymphocytes before RNA extraction by cultivation and PHA stimulation diminishes aberrant splicing in aged blood and is thus useful to circumvent splicing alterations which are frequently compromising mutation detection in patient samples and mimic mutation-induced alterations of mRNA.

journal_name

Hum Genet

journal_title

Human genetics

authors

Wimmer K,Eckart M,Rehder H,Fonatsch C

doi

10.1007/s004390051043

keywords:

subject

Has Abstract

pub_date

2000-03-01 00:00:00

pages

311-3

issue

3

eissn

0340-6717

issn

1432-1203

journal_volume

106

pub_type

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