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Optical genome mapping (OGM) has recently emerged as a new technology in the clinical cytogenomics laboratories. This methodology has the ability to detect balanced and unbalanced structural rearrangements using ultra-high molecular weight DNA. This article discusses the uses of this new technology in both constitutional and somatic settings, its advantages as well as opportunity for improvements. We reviewed the medical and scientific literature for methodology and current clinical uses of OGM. OGM is a recent addition to the methods used in cytogenomics laboratories and can detect a wide range of structural and copy number variations across a plethora of diseases. Clinical cytogenomics is an important laboratory specialty for which various technologies have been validated over the last several decades to improve detection of copy number and structural variations and their association to human disease. OGM has proven to be a powerful tool in the arsenal of clinical laboratories and provides a unified workflow for the detection of chromosomal aberrations across a wide range of diseases.
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http://dx.doi.org/10.3390/genes16080924 | DOI Listing |
Genet Med
September 2025
Institute for Clinical and Translational Science, University of California, Irvine, CA, USA.
Purpose: Advancements in sequencing technologies have significantly improved clinical genetic testing, yet the diagnostic yield remains around 30-40%. Emerging technologies are now being deployed to address the remaining diagnostic gap.
Methods: We tested whether short-read genome sequencing could increase the diagnostic yield in individuals enrolled into the UCI-GREGoR research study, who had suspected Mendelian conditions and prior inconclusive testing.
Front Genet
August 2025
Affiliated Hospital of Zunyi Medical University, Zunyi, China.
Background And Objective: Parental chromosomal structural variations (SVs) represent a primary genetic factor contributing to recurrent spontaneous abortion (RSA). Individuals carrying SVs with complex chromosomal rearrangements (CCRs) typically exhibit a normal phenotype but are at an increased risk of miscarriage. Current standard clinical detection methods are insufficient for the identification and interpretation of all SV types, particularly complex and occult SVs, thereby presenting a significant challenge for clinical genetic counseling.
View Article and Find Full Text PDFAm J Clin Pathol
September 2025
Laboratory for Clinical Genomics and Advanced Technology (CGAT)-Department of Pathology and Laboratory Medicine, Dartmouth Hitchcock Medical Center, Lebanon, NH, United States.
Objective: Differentiating between the repertoire of immunoglobulin rearrangements is important in guiding diagnoses and management of B-cell lymphoma processes. A subset of these disease entities, such as chronic lymphocytic leukemia (CLL) and mantle cell lymphoma (MCL), can show distinct genomic profiles with a shared cell of origin. In this report, we describe a rare case in which differentiating between the immunoglobulin family of rearrangements (IGH, IGK, IGL) with optical genome mapping (OGM) helped revise the clinical suspicion of CLL.
View Article and Find Full Text PDFBMC Mol Cell Biol
September 2025
School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, UK.
Retinitis pigmentosa (RP) affects around 1 in 4000 individuals and represents approximately 25% of cases of vision loss in adults, through death of retinal rod and cone photoreceptor cells. It remains a largely untreatable disease, and research is needed to identify potential targets for therapy. Mutations in 94 different genes have been identified as causing RP, including AGBL5 which encodes the main deglutamylase that regulates and maintains functional levels of cilia tubulin glutamylation, which is essential to initiate ciliogenesis, maintain cilia stability and motility.
View Article and Find Full Text PDFNat Aging
September 2025
Aging Biomarker Consortium (ABC), Beijing, China.
The global surge in the population of people 60 years and older, including that in China, challenges healthcare systems with rising age-related diseases. To address this demographic change, the Aging Biomarker Consortium (ABC) has launched the X-Age Project to develop a comprehensive aging evaluation system tailored to the Chinese population. Our goal is to identify robust biomarkers and construct composite aging clocks that capture biological age, defined as an individual's physiological and molecular state, across diverse Chinese cohorts.
View Article and Find Full Text PDF