ARMS2

ARMS2
Name	ARMS2
Other symbols	LOC387715
Chromosome	10q26
Omim	611313

ARMS2

ARMS2 is a human gene located on chromosome 10q26 that has been implicated in retinal biology and susceptibility to age-related macular degeneration. It encodes a protein reported to localize to the outer retina and the mitochondrial-associated compartments and has been the focus of genetic, epidemiological, and functional studies in ophthalmology and genomics. Research on ARMS2 has intersected with work on complement pathways, population genetics, and translational efforts in retinal therapeutics.

Introduction

ARMS2 occupies a locus adjacent to HTRA1 on chromosome 10q26 and was highlighted by genome-wide association studies that involved cohorts from consortia such as the International HapMap Project, the Wellcome Trust, and the National Human Genome Research Institute. Early association signals were reported in studies comparing cohorts from institutions like the Mayo Clinic, the Johns Hopkins Hospital, and the University of Pennsylvania. Subsequent meta-analyses published in journals affiliated with organizations including the American Medical Association and the American Academy of Ophthalmology have examined its role alongside loci such as CFH on chromosome 1 and variants identified by the Consortium for Refractive Error and Myopia.

Gene and protein structure

The ARMS2 locus spans coding and noncoding sequence near the promoter region of neighboring genes catalogued in databases maintained by the National Center for Biotechnology Information and the European Bioinformatics Institute. The gene model was refined using sequence data from the 1000 Genomes Project, cDNA clones from the Genotype-Tissue Expression Project, and annotation pipelines at the Ensembl and UCSC Genome Browser hubs. Protein prediction algorithms from groups at the Broad Institute and structural analyses informed by tools developed at the Protein Data Bank suggest a 9–12 kDa polypeptide with limited homology to characterized protein families, prompting investigation by laboratories at institutions including Harvard Medical School, Massachusetts Institute of Technology, and the University of California, San Francisco.

Function and expression

Expression profiling studies in retinal tissue have been conducted using samples from eye banks coordinated with programs at the National Eye Institute and pathology units at the Moorfields Eye Hospital. ARMS2 expression patterns were compared with markers studied by teams at the Schepens Eye Research Institute and with mitochondrial markers characterized by researchers at the Max Planck Institute for Biology. Functional assays performed in cell lines used reagents and platforms from suppliers associated with the Biotech Industry and experimental frameworks from groups at the Salk Institute and the Karolinska Institutet. Immunohistochemistry and RNA in situ hybridization studies linked ARMS2 expression to the retinal pigment epithelium and photoreceptor support cells investigated by investigators at the Bascom Palmer Eye Institute and the Wilmer Eye Institute.

Clinical significance and association with age-related macular degeneration

Variants at the 10q26 locus have been associated with increased risk of age-related macular degeneration (AMD) in case–control cohorts assembled by consortia including the Age-Related Eye Disease Study and the European Genetics of AMD Consortium. Clinical correlations were examined alongside phenotyping standards from the International Classification of Diseases and imaging modalities developed by manufacturers collaborating with the American Academy of Ophthalmology and the Royal College of Ophthalmologists. Therapeutic implications have been discussed at meetings organized by the Association for Research in Vision and Ophthalmology and explored in clinical trials registered through networks affiliated with the National Institutes of Health and pharmaceutical companies including those partnering with the Biogen and Genentech pipelines.

Genetic variants and population studies

Key single-nucleotide polymorphisms and indels in the ARMS2 region, such as the reported coding insertion-deletion alleles, were traced in population cohorts from the Framingham Heart Study, the UK Biobank, and the Rotterdam Study. Allelic frequencies vary among populations sampled in projects like the 1000 Genomes Project, the HapMap Project, and national biobanks from Japan, Iceland, Finland, and the United States. Comparative analyses published by teams at the Karolinska Institutet, University of Tokyo, and the University of Oxford evaluated linkage disequilibrium with neighboring loci and interactions with variants in complement genes such as those studied by researchers at the University of Utah and the University of Iceland.

Research and experimental models

Functional investigation of ARMS2 has employed in vitro systems established by laboratories at the National Eye Institute and in vivo models developed at facilities such as the Jackson Laboratory and the European Molecular Biology Laboratory. Gene-editing approaches using platforms from CRISPR Therapeutics and academic groups at the Broad Institute and Stanford University have generated cell and animal models to probe variant effects. Translational research integrating imaging techniques from vendors showcased at the American Society of Retina Specialists and biomarker studies run by groups at the Mayo Clinic continue to evaluate ARMS2 in the context of therapeutic development by consortia that include academic centers and biotechnology companies.

Category:Genes on human chromosome 10