PMID- 21487440 OWN - NLM STAT- MEDLINE DCOM- 20120103 LR - 20220317 IS - 1476-5438 (Electronic) IS - 1018-4813 (Print) IS - 1018-4813 (Linking) VI - 19 IP - 9 DP - 2011 Sep TI - Multiplex ligation-depending probe amplification is not suitable for detection of low-grade mosaicism. PG - 1009-12 LID - 10.1038/ejhg.2011.60 [doi] AB - 'Apparent non-penetrance' occurs in several genetic disorders, including tuberous sclerosis complex and neurofibromatosis type 1: clinically unaffected parents may have multiple affected offspring. Germ line or somatic mosaicism in one of the parents of the index patient is the probable cause and results in an enhanced recurrence risk. Therefore, it is of great importance to use the most sensitive technology for testing DNA of the parents of the index patient for the presence/absence of the familial mutation. To detect large rearrangements multiplex ligation-depending probe amplification (MLPA) is often used. Here we show that MLPA is less sensitive in detecting low-grade somatic mosaicism than fluorescence in situ hybridization (FISH) or a mutation-specific PCR test. Therefore, we recommend FISH (if possible) or PCR analysis for the analysis of parental DNA. FAU - van Veghel-Plandsoen, Monique M AU - van Veghel-Plandsoen MM AD - Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands. m.plandsoen@erasmusmc.nl FAU - Wouters, Cokkie H AU - Wouters CH FAU - Kromosoeto, Joan N R AU - Kromosoeto JN FAU - den Ridder-Klunnen, Mariska C AU - den Ridder-Klunnen MC FAU - Halley, Dicky J J AU - Halley DJ FAU - van den Ouweland, Ans M W AU - van den Ouweland AM LA - eng PT - Journal Article DEP - 20110413 PL - England TA - Eur J Hum Genet JT - European journal of human genetics : EJHG JID - 9302235 SB - IM MH - Germ Cells MH - Humans MH - In Situ Hybridization, Fluorescence/methods MH - *Mosaicism MH - Neurofibromatosis 1/genetics MH - Nucleic Acid Amplification Techniques/*methods MH - *Parents MH - *Penetrance MH - Polymerase Chain Reaction MH - Sensitivity and Specificity MH - Tuberous Sclerosis/genetics PMC - PMC3179360 EDAT- 2011/04/14 06:00 MHDA- 2012/01/04 06:00 PMCR- 2012/09/01 CRDT- 2011/04/14 06:00 PHST- 2011/04/14 06:00 [entrez] PHST- 2011/04/14 06:00 [pubmed] PHST- 2012/01/04 06:00 [medline] PHST- 2012/09/01 00:00 [pmc-release] AID - ejhg201160 [pii] AID - 10.1038/ejhg.2011.60 [doi] PST - ppublish SO - Eur J Hum Genet. 2011 Sep;19(9):1009-12. doi: 10.1038/ejhg.2011.60. Epub 2011 Apr 13.