Cone-rod dystrophy (CORD) and cone dystrophy (COD) are a subgroup of inherited retinal dystrophies characterized by progressive loss of photoreceptor function. In contrast to retinitis pigmentosa (RP), deterioration of the cone cells is more severe than the rod cells. In CORD, there is a progressive loss of cone photoreceptor function followed by gradual loss of rod photoreceptor function and retinal degeneration. In COD, cone function decreases progressively from its onset, though rod function is well preserved until the late stages of the disease.
Roosing S, Rohrschneider K, Beryozkin A, Sharon D, Weisschuh N, Staller J, Kohl S, Zelinger L, Peters TA, Neveling K, Strom TM, van den Born LI, Hoyng CB, Klaver CC, Roepman R, Wissinger B, Banin E, Cremers FP, den Hollander AI
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Mutations in RAB28, encoding a farnesylated small GTPase, are associated with autosomal-recessive cone-rod dystrophy.
Sergouniotis PI, Chakarova C, Murphy C, Becker M, Lenassi E, Arno G, Lek M, MacArthur DG, Bhattacharya SS, Moore AT, Holder GE, Robson AG, Wolfrum U, Webster AR, Plagnol V
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Biallelic variants in TTLL5, encoding a tubulin glutamylase, cause retinal dystrophy.
El-Asrag ME, Sergouniotis PI, McKibbin M, Plagnol V, Sheridan E, Waseem N, Abdelhamed Z, McKeefry D, Van Schil K, Poulter JA, Johnson CA, Carr IM, Leroy BP, De Baere E, Inglehearn CF, Webster AR, Toomes C, Ali M
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Biallelic mutations in the autophagy regulator DRAM2 cause retinal dystrophy with early macular involvement.
Bertrand RE, Wang J, Xiong KH, Thangavel C, Qian X, Ba-Abbad R, Liang Q, Simoes RT, Sampaio SAM, Carss KJ, Lucy Raymond F, Robson AG, Webster AR, Arno G, Porto FBO, Chen R
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Ceramide synthase TLCD3B is a novel gene associated with human recessive retinal dystrophy.
Wissinger B, Schaich S, Baumann B, Bonin M, Jagle H, Friedburg C, Varsanyi B, Hoyng CB, Dollfus H, Heckenlively JR, Rosenberg T, Rudolph G, Kellner U, Salati R, Plomp A, De Baere E, Andrassi-Darida M, Sauer A, Wolf C, Zobor D, Bernd A, Leroy BP, Enyedi P, Cremers FP, Lorenz B, Zrenner E, Kohl S
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Large deletions of the KCNV2 gene are common in patients with cone dystrophy with supernormal rod response.