{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nPLEKHA1 is one of several genes mapping to the chromosome 10q26 locus that has emerged from genetic studies as being associated with age‐related macular degeneration (AMD) and age‐related maculopathy (ARM). Although the precise biological function of PLEKHA1 remains to be fully elucidated, its product harbors a pleckstrin homology domain—suggesting a role in intracellular signaling or membrane dynamics. Several studies have examined this gene together with its closely linked neighbors (such as LOC387715/ARMS2 and HTRA1) to determine their contributions to disease risk, with evidence that variants within this region are robustly associated with AMD susceptibility."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "3"}]}, {"type": "t", "text": ""}, {"type": "p", "children": [{"type": "t", "text": "\nIn focused association studies, PLEKHA1 has been highlighted as potentially accounting for the observed linkage signals in the 10q26 region—in some cohorts showing a stronger statistical association with ARM/AMD than nearby LOC387715. For example, certain analyses have reported that while both genes in the cluster contribute to disease risk, single nucleotide polymorphisms (SNPs) in PLEKHA1 may better explain the linkage in the critical region. However, association results have been somewhat inconsistent across populations and sample sets, underlining the complexity in untangling the individual contributions of this tightly linked gene cluster to AMD pathogenesis."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "4", "end_ref": "6"}]}, {"type": "t", "text": ""}, {"type": "p", "children": [{"type": "t", "text": "\nBroader meta-analytical and gene-cluster approaches, including studies in diverse populations, further corroborate a cumulative effect of less-studied genetic variants in the PLEKHA1/ARMS2/HTRA1 cluster on AMD risk. Although the molecular function of PLEKHA1 itself has not been as extensively characterized as some of its neighbors, its putative role in mediating intracellular processes critical for retinal cell function is supported by its structural domain. Along with corroborative association data, these findings prompt ongoing efforts to clarify the precise cellular roles of PLEKHA1 and its contribution to the genetic architecture of AMD."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "7", "end_ref": "9"}]}]}]}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Andrea Rivera, Sheila A Fisher, Lars G Fritsche, et al. 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"}, {"type": "b", "children": [{"type": "t", "text": "A variant of mitochondrial protein LOC387715/ARMS2, not HTRA1, is strongly associated with age-related macular degeneration."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Proc Natl Acad Sci U S A (2007)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1073/pnas.0703933104"}], "href": "https://doi.org/10.1073/pnas.0703933104"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "17884985"}], "href": "https://pubmed.ncbi.nlm.nih.gov/17884985"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Yvette P Conley, Johanna Jakobsdottir, Tammy Mah, et al. 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