Poot Martin, Eleveld Marc J, van 't Slot Ruben, van Genderen Maria M, Verrijn Stuart Annemarie A, Hochstenbach Ron, Beemer Frits A
Department of Medical Genetics, University Medical Center Utrecht, Mail stop: KC.04.084.2, P.O. Box 85090, 3508 AB Utrecht, The Netherlands.
Eur J Med Genet. 2007 Nov-Dec;50(6):432-40. doi: 10.1016/j.ejmg.2007.08.003. Epub 2007 Sep 9.
We report on an 8(1)/(2)-year-old girl with severe pre- and postnatal growth retardation, congenital heart malformation, facial asymmetry, oculocutaneous albinism without misrouting and subluxation of the radial heads. Her intelligence was in the low normal range. By GTG-banding a deletion of band 15q26 was found. Array-CGH, using a 3783 BAC array, revealed a segmental monosomy of the 15(q26.2-->qter) region, which was narrowed down to a 6.87Mb deletion by using the Illumina Infinium 317 K SNP array system, and subsequently confirmed by fluorescence in situ hybridisation (FISH) analysis. The deletion appeared to have arisen de novo. The IGF1R (insulin-like growth factor 1 receptor) and the NR2F2 genes were situated within, but the OCA2 (oculocutaneous albinism II) gene (formerly called the P gene) was located outside the deleted region. Clinical findings in our patient were compared with previously reported cases carrying terminal deletions of 15q26.2. This allowed us to expand the clinical phenotype of terminal 15q26.2 deletions and to indicate candidate genes for several phenotypic features.
我们报告了一名8岁半的女孩,她在出生前和出生后均有严重的生长发育迟缓、先天性心脏畸形、面部不对称、眼皮肤白化病且无桡骨头异位和半脱位。她的智力处于低正常范围。通过GTG显带,发现15q26带缺失。使用3783个BAC阵列的阵列比较基因组杂交(Array-CGH)显示15(q26.2→qter)区域存在节段性单体性,通过使用Illumina Infinium 317K SNP阵列系统将其缩小至6.87Mb的缺失,并随后通过荧光原位杂交(FISH)分析得到证实。该缺失似乎是新发的。胰岛素样生长因子1受体(IGF1R)和NR2F2基因位于缺失区域内,但眼皮肤白化病II型(OCA2)基因(以前称为P基因)位于缺失区域外。我们将患者的临床发现与先前报道的携带15q26.2末端缺失的病例进行了比较。这使我们能够扩展15q26.2末端缺失的临床表型,并指出几种表型特征的候选基因。