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Nardone, Giuseppe Giovanni; Spedicati, Beatrice; Concas, Maria Pina; Santin, Aurora; Morgan, Anna; Mazzetto, Lorenzo; Battaglia-Parodi, Maurizio; Girotto, Giorgia
Frontiers in genetics, 06/2023, Letnik: 14Journal Article
Color vision defects (CVDs) are conditions characterized by the alteration of normal trichromatic vision. CVDs can arise as the result of alterations in three genes ( , , ) or as a combination of genetic predisposition and environmental factors. To date, apart from Mendelian CVDs forms, nothing is known about multifactorial CVDs forms. Five hundred and twenty individuals from Silk Road isolated communities were genotyped and phenotypically characterized for CVDs using the Farnsworth D-15 color test. The CVDs traits Deutan-Protan (DP) and Tritan (TR) were analysed. Genome Wide Association Study for both traits was performed, and results were corrected with a False Discovery Rate linkage-based approach (FDR-p). Gene expression of final candidates was investigated using a published human eye dataset, and pathway analysis was performed. Concerning DP, three genes: (FDR-p: 9.01*10 ), (FDR-p: 4.97*10 ) and (FDR-p: 4.98*10 ), stood out as promising candidates. is involved in the preservation of Retinal Pigmented Epithelium (RPE) homeostasis while and are both involved in visual signal transmission. With regards to TR, four genes: (FDR-p: 4.09*10 ), (FDR-p: 6,52*10 ), (FDR-p: 8.34*10 ), and (FDR-p: 2.10*10 ), were considered promising candidates. is reported to be associated with Retinitis pigmentosa; is reported to regulate choroidal vascularization in Age-Related Macular Degeneration; is involved in RPE homeostasis regulation; is reported to regulate lacrimal gland function. Overall, these results provide novel insights regarding a complex phenotype (i.e., CVDs) in an underrepresented population such as Silk Road isolated communities.
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in: SICRIS
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