Multiplex ligation-dependent probe amplification for rapid detection of proteolipid protein 1 gene duplications and deletions in affected males and carrier females with Pelizaeus-Merzbacher disease.
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Multiplex ligation-dependent probe amplification for rapid detection of proteolipid protein 1 gene duplications and deletions in affected males and carrier females with Pelizaeus-Merzbacher disease. / Warshawsky, Ilka; Chernova, Olga B; Hübner, Christian; Stindl, Reinhard; Henneke, Marco; Gal, Andreas; Natowicz, Marvin R.
in: CLIN CHEM, Jahrgang 52, Nr. 7, 7, 2006, S. 1267-1275.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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T1 - Multiplex ligation-dependent probe amplification for rapid detection of proteolipid protein 1 gene duplications and deletions in affected males and carrier females with Pelizaeus-Merzbacher disease.
AU - Warshawsky, Ilka
AU - Chernova, Olga B
AU - Hübner, Christian
AU - Stindl, Reinhard
AU - Henneke, Marco
AU - Gal, Andreas
AU - Natowicz, Marvin R
PY - 2006
Y1 - 2006
N2 - BACKGROUND: Pelizaeus-Merzbacher disease is a rare X-linked neurodegenerative disorder caused by sequence variations in the proteolipid protein 1 gene (PLP1). PLP1 gene duplications account for approximately 50%-75% of cases and point variations for approximately 15%-20% of cases; deletions and insertions occur infrequently. We used multiplex ligation-dependent probe amplification (MLPA) to detect PLP1 gene alterations, especially gene duplications and deletions. METHODS: We performed MLPA on 102 samples from individuals with diverse PLP1 gene abnormalities and from controls, including 50 samples previously characterized for the PLP1 gene by quantitative PCR but which were anonymized for prior results and sex. RESULTS: All males with PLP1 gene duplications (n = 13), 1 male with a triplication, 2 males with whole gene deletions, and all controls (n = 72) were unambiguously assigned to their correct genotype. Of 4 female carriers tested by MLPA and quantitative PCR, 3 were duplication carriers by both methods, and 1 was a triplication carrier by MLPA and a duplication carrier by quantitative PCR. For 1 sample with a partial deletion, MLPA showed exon 3 deleted but PCR showed exons 3 and 4 deleted. Sequence analysis of 2 samples with reduced dosage for exons 3 and 5 revealed point variations overlapping the annealing site for the corresponding MLPA probe. The precision of MLPA analysis was excellent and comparable to or better than quantitative PCR, with CVs of 4.3%-9.8%. CONCLUSIONS: MLPA is a rapid and reliable method to determine PLP1 gene copies. Samples with partial PLP1 gene dosage alterations require confirmation with a non-MLPA method.
AB - BACKGROUND: Pelizaeus-Merzbacher disease is a rare X-linked neurodegenerative disorder caused by sequence variations in the proteolipid protein 1 gene (PLP1). PLP1 gene duplications account for approximately 50%-75% of cases and point variations for approximately 15%-20% of cases; deletions and insertions occur infrequently. We used multiplex ligation-dependent probe amplification (MLPA) to detect PLP1 gene alterations, especially gene duplications and deletions. METHODS: We performed MLPA on 102 samples from individuals with diverse PLP1 gene abnormalities and from controls, including 50 samples previously characterized for the PLP1 gene by quantitative PCR but which were anonymized for prior results and sex. RESULTS: All males with PLP1 gene duplications (n = 13), 1 male with a triplication, 2 males with whole gene deletions, and all controls (n = 72) were unambiguously assigned to their correct genotype. Of 4 female carriers tested by MLPA and quantitative PCR, 3 were duplication carriers by both methods, and 1 was a triplication carrier by MLPA and a duplication carrier by quantitative PCR. For 1 sample with a partial deletion, MLPA showed exon 3 deleted but PCR showed exons 3 and 4 deleted. Sequence analysis of 2 samples with reduced dosage for exons 3 and 5 revealed point variations overlapping the annealing site for the corresponding MLPA probe. The precision of MLPA analysis was excellent and comparable to or better than quantitative PCR, with CVs of 4.3%-9.8%. CONCLUSIONS: MLPA is a rapid and reliable method to determine PLP1 gene copies. Samples with partial PLP1 gene dosage alterations require confirmation with a non-MLPA method.
M3 - SCORING: Zeitschriftenaufsatz
VL - 52
SP - 1267
EP - 1275
JO - CLIN CHEM
JF - CLIN CHEM
SN - 0009-9147
IS - 7
M1 - 7
ER -