PMID- 26382709 OWN - NLM STAT- MEDLINE DCOM- 20160921 LR - 20181113 IS - 1531-698X (Electronic) IS - 1040-8703 (Print) IS - 1040-8703 (Linking) VI - 27 IP - 6 DP - 2015 Dec TI - Mutations in the noncoding genome. PG - 659-64 LID - 10.1097/MOP.0000000000000283 [doi] AB - PURPOSE OF REVIEW: Clinical diagnostic sequencing currently focuses on identifying causal mutations in the exome, wherein most disease-causing mutations are known to occur. The rest of the genome is mostly comprised of regulatory elements that control gene expression, but these have remained largely unexplored in clinical diagnostics due to the high cost of whole genome sequencing and interpretive challenges. The purpose of this review is to illustrate examples of diseases caused by mutations in regulatory elements and introduce the diagnostic potential for whole genome sequencing. Different classes of functional elements and chromatin structure are described to provide the clinician with a foundation for understanding the basis of these mutations. RECENT FINDINGS: The utilization of whole-genome sequence data, epigenomic maps and induced pluripotent stem (IPS) cell technologies facilitated the discovery that mutations in the pancreas-specific transcription factor 1a enhancer can cause isolated pancreatic agenesis. High resolution array comparative genomic hybridisation (CGH), whole-genome sequencing, maps of 3-D chromatin architecture, and mouse models generated using clustered regularly interspaced short palindromic repeats (CRISPR)/Cas were used to show that disruption of topological-associated domain boundary elements cause limb defects. Structural variants that reposition enhancers in somatic cells have also been described in cancer. SUMMARY: Although not ready for diagnostics, new technologies, epigenomic maps, and improved knowledge of chromatin architecture will soon enable a better understanding and diagnostic solutions for currently unexplained genetic disorders. FAU - Scacheri, Cheryl A AU - Scacheri CA AD - aCourtagen Life Sciences, 12 Gill St, Ste. 3700, Woburn, MA 01801 bDepartment of Genetics and Genome Sciences, Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine; Cleveland, Ohio, USA. FAU - Scacheri, Peter C AU - Scacheri PC LA - eng GR - R01 CA160356/CA/NCI NIH HHS/United States GR - R01CA160356/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Review PL - United States TA - Curr Opin Pediatr JT - Current opinion in pediatrics JID - 9000850 RN - 0 (Chromatin) SB - IM MH - Chromatin/*genetics/metabolism MH - Clustered Regularly Interspaced Short Palindromic Repeats/*genetics MH - Gene Expression Profiling MH - Genetic Predisposition to Disease/*genetics MH - Genome-Wide Association Study MH - High-Throughput Nucleotide Sequencing MH - Humans MH - Mutation/*genetics MH - Promoter Regions, Genetic MH - Quantitative Trait Loci/*genetics PMC - PMC5084913 MID - NIHMS730645 COIS- Cheryl Scacheri is a paid employee of GeneDx, a for-profit company that specializes in diagnostic sequencing. The views and opinions expressed in this article are those of the authors and do not necessarily reflect those of GeneDx. EDAT- 2015/09/19 06:00 MHDA- 2016/09/23 06:00 PMCR- 2016/12/01 CRDT- 2015/09/19 06:00 PHST- 2015/09/19 06:00 [entrez] PHST- 2015/09/19 06:00 [pubmed] PHST- 2016/09/23 06:00 [medline] PHST- 2016/12/01 00:00 [pmc-release] AID - 10.1097/MOP.0000000000000283 [doi] PST - ppublish SO - Curr Opin Pediatr. 2015 Dec;27(6):659-64. doi: 10.1097/MOP.0000000000000283.