PMID- 17591941 OWN - NLM STAT- MEDLINE DCOM- 20070919 LR - 20240414 IS - 1525-1578 (Print) IS - 1525-1578 (Linking) VI - 9 IP - 3 DP - 2007 Jul TI - Constitutional duplication of a region of chromosome Yp encoding AMELY, PRKY, and TBL1Y: implications for sex chromosome analysis and bone marrow engraftment analysis. PG - 408-13 AB - Amelogenin has chromosome X (AMELX) and Y (AMELY) homologs that can be differentiated based on the length of polymerase chain reaction (PCR) amplification products. In addition to being useful for gender identification, analysis of amelogenin has utility for monitoring bone marrow engraftment in patients after a sex-mismatched bone marrow transplant, characterizing sex chromosome abnormalities, and for forensic purposes for analyzing mixtures of male and female DNA. Here, we describe two brothers in which PCR analysis demonstrated twofold greater AMELY products compared with AMELX products. Karyotype and X/Y fluorescence in situ hybridization analysis demonstrated a single copy of the X and Y chromosomes without any identifiable abnormalities. Oligonucleotide comparative genomic hybridization array analysis demonstrated a duplication of a portion of chromosome Yp that encompassed a region of at least 2.6 Mb but not greater than 4.0 Mb. The amplified region contains the genes AMELY, transducin (beta)-like 1 protein Y (TBL1Y), and protein kinase Y (PRKY). To our knowledge, duplication of this region has not previously been reported. The family history is unremarkable, and the brothers are without ap-parent dysmorphic features. Although this and other genetic variants involving AMELY are uncommon, one should use caution when using amelogenin for sex chromosome analysis and bone marrow engraftment analysis. FAU - Murphy, Kathleen M AU - Murphy KM AD - Department of Pathology, John Hopkins Medical Institutions, Baltimore, MD, USA. kmurphy4@jhmi.edu FAU - Cohen, Julie S AU - Cohen JS FAU - Goodrich, Amy AU - Goodrich A FAU - Long, Patricia P AU - Long PP FAU - Griffin, Constance A AU - Griffin CA LA - eng PT - Case Reports PT - Journal Article PL - United States TA - J Mol Diagn JT - The Journal of molecular diagnostics : JMD JID - 100893612 RN - 0 (AMELY protein, human) RN - 0 (Amelogenin) RN - 0 (TBL1Y protein, human) RN - EC 2.7.1.- (PRKY protein, human) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 3.6.5.1 (Transducin) SB - IM MH - Adult MH - Amelogenin/analysis/*genetics MH - *Bone Marrow Transplantation MH - *Chromosomes, Human, Y MH - DNA Mutational Analysis/*methods MH - Directed Tissue Donation MH - *Gene Duplication MH - Humans MH - Lymphoma, B-Cell/genetics/therapy MH - Lymphoma, Large B-Cell, Diffuse/genetics/therapy MH - Male MH - Protein Serine-Threonine Kinases/*genetics MH - *Sex Chromosome Aberrations MH - Siblings MH - Transducin/*genetics PMC - PMC1899418 EDAT- 2007/06/27 09:00 MHDA- 2007/09/20 09:00 PMCR- 2008/07/01 CRDT- 2007/06/27 09:00 PHST- 2007/06/27 09:00 [pubmed] PHST- 2007/09/20 09:00 [medline] PHST- 2007/06/27 09:00 [entrez] PHST- 2008/07/01 00:00 [pmc-release] AID - S1525-1578(10)60410-2 [pii] AID - 06-0198 [pii] AID - 10.2353/jmoldx.2007.060198 [doi] PST - ppublish SO - J Mol Diagn. 2007 Jul;9(3):408-13. doi: 10.2353/jmoldx.2007.060198.