-
Je něco špatně v tomto záznamu ?
Mosaic tissue distribution of the tandem duplication of LAMP2 exons 4 and 5 demonstrates the limits of Danon disease cellular and molecular diagnostics
F. Majer, O. Pelak, T. Kalina, H. Vlaskova, L. Dvorakova, T. Honzik, T. Palecek, P. Kuchynka, M. Masek, J. Zeman, M. Elleder, J. Sikora,
Jazyk angličtina Země Nizozemsko
Typ dokumentu kazuistiky, časopisecké články, práce podpořená grantem
Medline Complete (EBSCOhost) od 2009-08-01 do Před 1 rokem
Health & Medicine (ProQuest) od 1999-02-01 do 2018-11-30
Odkazy
PubMed
23716275
DOI
10.1007/s10545-013-9617-z
Knihovny.cz E-zdroje
- MeSH
- dospělí MeSH
- duplikace genu * MeSH
- exony * MeSH
- fenotyp MeSH
- glykogenóza typu IIb diagnóza genetika MeSH
- granulocyty cytologie MeSH
- leukocyty cytologie MeSH
- lidé MeSH
- magnetická rezonanční tomografie MeSH
- membránový protein 2 asociovaný s lyzozomy genetika MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mozaicismus MeSH
- mutace MeSH
- myokard patologie MeSH
- průtoková cytometrie MeSH
- rodokmen MeSH
- sourozenci MeSH
- tkáňová distribuce MeSH
- variabilita počtu kopií segmentů DNA MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- kazuistiky MeSH
- práce podpořená grantem MeSH
Alu-mediated tandem duplication of exons 4 and 5 (g.15815_22218dup6404) is a novel mutation that has been detected in the LAMP2 gene (Xq24). This exon copy number variation was found in two brothers with the typical phenotype of Danon disease, including characteristic myocardial changes on magnetic resonance imaging. The 6.4 kb duplication was identified in both boys by a combination of exon dosage qPCR analyses and duplication breakpoint/junction mapping. The rearrangement results in a plethora of abnormal LAMP2 splicing variants and also in use of likely cryptic splice sites in the 3' terminus of LAMP2 gene. Although we found minute amounts of normal LAMP2B and LAMP2A mRNAs, no protein was detectable in peripheral blood leukocytes by flow cytometry in both brothers. Uniquely, the fraction of LAMP2-deficient granulocytes (0.06%) assessed by flow cytometry in the patients' asymptomatic mother substantially differed from the random distribution of X-chromosome inactivation in her leukocytes. This discrepancy was later explained by molecular genetic methods as a consequence of mosaic distribution of the mutation in her somatic tissues. Altogether, we report a novel and mosaically distributed exon copy number rearrangement in the LAMP2 gene and comment on obstacles this genetic setup presents to the overall cellular and molecular diagnostic algorithm of Danon disease. Our observations of the mosaicism in the asymptomatic mother suggest that similarly affected females could be a potentially under-diagnosed Danon disease carrier group and that LAMP2 flow cytometry, because of its supreme sensitivity, can be an efficient method for pedigree screening.
- 000
- 00000naa a2200000 a 4500
- 001
- bmc14074728
- 003
- CZ-PrNML
- 005
- 20141007101202.0
- 007
- ta
- 008
- 141006s2014 ne f 000 0|eng||
- 009
- AR
- 024 7_
- $a 10.1007/s10545-013-9617-z $2 doi
- 035 __
- $a (PubMed)23716275
- 040 __
- $a ABA008 $b cze $d ABA008 $e AACR2
- 041 0_
- $a eng
- 044 __
- $a ne
- 100 1_
- $a Majer, Filip $u Institute of Inherited Metabolic Disorders, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Ke Karlovu 2, 128 00, Prague 2, Czech Republic.
- 245 10
- $a Mosaic tissue distribution of the tandem duplication of LAMP2 exons 4 and 5 demonstrates the limits of Danon disease cellular and molecular diagnostics / $c F. Majer, O. Pelak, T. Kalina, H. Vlaskova, L. Dvorakova, T. Honzik, T. Palecek, P. Kuchynka, M. Masek, J. Zeman, M. Elleder, J. Sikora,
- 520 9_
- $a Alu-mediated tandem duplication of exons 4 and 5 (g.15815_22218dup6404) is a novel mutation that has been detected in the LAMP2 gene (Xq24). This exon copy number variation was found in two brothers with the typical phenotype of Danon disease, including characteristic myocardial changes on magnetic resonance imaging. The 6.4 kb duplication was identified in both boys by a combination of exon dosage qPCR analyses and duplication breakpoint/junction mapping. The rearrangement results in a plethora of abnormal LAMP2 splicing variants and also in use of likely cryptic splice sites in the 3' terminus of LAMP2 gene. Although we found minute amounts of normal LAMP2B and LAMP2A mRNAs, no protein was detectable in peripheral blood leukocytes by flow cytometry in both brothers. Uniquely, the fraction of LAMP2-deficient granulocytes (0.06%) assessed by flow cytometry in the patients' asymptomatic mother substantially differed from the random distribution of X-chromosome inactivation in her leukocytes. This discrepancy was later explained by molecular genetic methods as a consequence of mosaic distribution of the mutation in her somatic tissues. Altogether, we report a novel and mosaically distributed exon copy number rearrangement in the LAMP2 gene and comment on obstacles this genetic setup presents to the overall cellular and molecular diagnostic algorithm of Danon disease. Our observations of the mosaicism in the asymptomatic mother suggest that similarly affected females could be a potentially under-diagnosed Danon disease carrier group and that LAMP2 flow cytometry, because of its supreme sensitivity, can be an efficient method for pedigree screening.
- 650 _2
- $a mladiství $7 D000293
- 650 _2
- $a dospělí $7 D000328
- 650 _2
- $a variabilita počtu kopií segmentů DNA $7 D056915
- 650 12
- $a exony $7 D005091
- 650 _2
- $a ženské pohlaví $7 D005260
- 650 _2
- $a průtoková cytometrie $7 D005434
- 650 12
- $a duplikace genu $7 D020440
- 650 _2
- $a glykogenóza typu IIb $x diagnóza $x genetika $7 D052120
- 650 _2
- $a granulocyty $x cytologie $7 D006098
- 650 _2
- $a lidé $7 D006801
- 650 _2
- $a leukocyty $x cytologie $7 D007962
- 650 _2
- $a membránový protein 2 asociovaný s lyzozomy $x genetika $7 D052119
- 650 _2
- $a magnetická rezonanční tomografie $7 D008279
- 650 _2
- $a mužské pohlaví $7 D008297
- 650 _2
- $a mozaicismus $7 D009030
- 650 _2
- $a mutace $7 D009154
- 650 _2
- $a myokard $x patologie $7 D009206
- 650 _2
- $a rodokmen $7 D010375
- 650 _2
- $a fenotyp $7 D010641
- 650 _2
- $a sourozenci $7 D035781
- 650 _2
- $a tkáňová distribuce $7 D014018
- 650 _2
- $a mladý dospělý $7 D055815
- 655 _2
- $a kazuistiky $7 D002363
- 655 _2
- $a časopisecké články $7 D016428
- 655 _2
- $a práce podpořená grantem $7 D013485
- 700 1_
- $a Pelak, Ondrej
- 700 1_
- $a Kalina, Tomas
- 700 1_
- $a Vlaskova, Hana
- 700 1_
- $a Dvorakova, Lenka
- 700 1_
- $a Honzik, Tomas
- 700 1_
- $a Palecek, Tomas
- 700 1_
- $a Kuchynka, Petr
- 700 1_
- $a Masek, Martin
- 700 1_
- $a Zeman, Jiri
- 700 1_
- $a Elleder, Milan
- 700 1_
- $a Sikora, Jakub
- 773 0_
- $w MED00002747 $t Journal of inherited metabolic disease $x 1573-2665 $g Roč. 37, č. 1 (2014), s. 117-24
- 856 41
- $u https://pubmed.ncbi.nlm.nih.gov/23716275 $y Pubmed
- 910 __
- $a ABA008 $b sig $c sign $y a $z 0
- 990 __
- $a 20141006 $b ABA008
- 991 __
- $a 20141007101640 $b ABA008
- 999 __
- $a ok $b bmc $g 1042611 $s 873640
- BAS __
- $a 3
- BAS __
- $a PreBMC
- BMC __
- $a 2014 $b 37 $c 1 $d 117-24 $i 1573-2665 $m Journal of inherited metabolic disease $n J Inherit Metab Dis $x MED00002747
- LZP __
- $a Pubmed-20141006