In genetics, loss of heterozygosity (LOH) is a type of genetic abnormality in diploid organisms in which one copy of an entire gene and its surrounding chromosomal region are lost. [1] .
LOH (short for “loss of heterozygosity”) refers to a type of mutation that results in the loss of one copy of a segment of DNA (typically containing a gene or group of genes).
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Loss of heterozygosity (LOH) is a common genetic event in the development of cancer. In certain tumor types, LOH can affect more than 20% of the genome, entailing loss of allelic variation in thousands of genes.
Loss of heterozygosity (LOH) is defined as the loss of a normal allele at a specific locus in a cell’s genome that already contains a deleterious mutation on the corresponding allele.
To enable interrogation of tumor HLA LOH as a clinical diagnostic for precision oncology, we developed and validated an assay that detects HLA LOH within the context of an FDA-approved clinical...
In this review, we explore the spectrum of LOH events, their mechanisms, and their impact on fitness and phenotype, drawing insights from Saccharomyces cerevisiae to cancer. We also emphasize the role of LOH in genomic instability, disease, and genome evolution.
Loss of Heterozygosity (LOH) is a critical concept in genetics that plays a significant role in cancer development and tumor suppressor gene inactivation. In this comprehensive guide, we will explore the complexities of LOH, its mechanisms, consequences, and significance in genetics.