ABCA4 p.Arg1161Ser
| Predicted by SNAP2: | A: D (66%), C: D (66%), D: D (71%), E: D (66%), F: D (66%), G: D (71%), H: D (53%), I: D (63%), K: N (72%), L: D (63%), M: D (63%), N: D (53%), P: D (66%), Q: D (59%), S: D (59%), T: N (53%), V: D (63%), W: D (80%), Y: D (63%), |
| Predicted by PROVEAN: | A: D, C: D, D: D, E: D, F: D, G: D, H: D, I: D, K: N, L: D, M: D, N: D, P: D, Q: N, S: D, T: D, V: D, W: D, Y: D, |
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[hide] Quantitative fundus autofluorescence in recessive ... Invest Ophthalmol Vis Sci. 2014 May 1;55(5):2841-52. doi: 10.1167/iovs.13-13624. Burke TR, Duncker T, Woods RL, Greenberg JP, Zernant J, Tsang SH, Smith RT, Allikmets R, Sparrow JR, Delori FC
Quantitative fundus autofluorescence in recessive Stargardt disease.
Invest Ophthalmol Vis Sci. 2014 May 1;55(5):2841-52. doi: 10.1167/iovs.13-13624., [PMID:24677105]
Abstract [show]
PURPOSE: To quantify fundus autofluorescence (qAF) in patients with recessive Stargardt disease (STGD1). METHODS: A total of 42 STGD1 patients (ages: 7-52 years) with at least one confirmed disease-associated ABCA4 mutation were studied. Fundus AF images (488-nm excitation) were acquired with a confocal scanning laser ophthalmoscope equipped with an internal fluorescent reference to account for variable laser power and detector sensitivity. The gray levels (GLs) of each image were calibrated to the reference, zero GL, magnification, and normative optical media density to yield qAF. Texture factor (TF) was calculated to characterize inhomogeneities in the AF image and patients were assigned to the phenotypes of Fishman I through III. RESULTS: Quantified fundus autofluorescence in 36 of 42 patients and TF in 27 of 42 patients were above normal limits for age. Young patients exhibited the relatively highest qAF, with levels up to 8-fold higher than healthy eyes. Quantified fundus autofluorescence and TF were higher in Fishman II and III than Fishman I, who had higher qAF and TF than healthy eyes. Patients carrying the G1916E mutation had lower qAF and TF than most other patients, even in the presence of a second allele associated with severe disease. CONCLUSIONS: Quantified fundus autofluorescence is an indirect approach to measuring RPE lipofuscin in vivo. We report that ABCA4 mutations cause significantly elevated qAF, consistent with previous reports indicating that increased RPE lipofuscin is a hallmark of STGD1. Even when qualitative differences in fundus AF images are not evident, qAF can elucidate phenotypic variation. Quantified fundus autofluorescence will serve to establish genotype-phenotype correlations and as an outcome measure in clinical trials.
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No. Sentence Comment
80 [L541P; A1038V] 356 354 1.7 1.8 5 F 14 1 0.60 0.60 II II p.L2027F; p.T972N 737 718 2.3 2.6 6 M 45 31 1.00 0.88 I I p.G1961E; p.P1380L 623 543 4.2 4.0 7 F 42 5 0.30 CF - I p.E1252* 557 2.1 8 M 15 4 0.80 0.80 II II p.L2027F; p.R2077W 728 697 3.2 3.2 9 F 24 2 0.60 0.40 II II p.R1161S 571 647 3.8 3.5 10 M 46 15 1.30 1.30 I I p.G1961E; p.Q636H 394 351 2.3 2.4 11.1 M 12 2 1.00 1.00 II - p.
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ABCA4 p.Arg1161Ser 24677105:80:275
status: NEW[hide] Flecks in Recessive Stargardt Disease: Short-Wavel... Invest Ophthalmol Vis Sci. 2015 Jul;56(8):5029-39. doi: 10.1167/iovs.15-16763. Sparrow JR, Marsiglia M, Allikmets R, Tsang S, Lee W, Duncker T, Zernant J
Flecks in Recessive Stargardt Disease: Short-Wavelength Autofluorescence, Near-Infrared Autofluorescence, and Optical Coherence Tomography.
Invest Ophthalmol Vis Sci. 2015 Jul;56(8):5029-39. doi: 10.1167/iovs.15-16763., [PMID:26230768]
Abstract [show]
PURPOSE: We evaluated the incongruous observation whereby flecks in recessive Stargardt disease (STGD1) can exhibit increased short-wavelength autofluorescence (SW-AF) that originates from retinal pigment epithelium (RPE) lipofuscin, while near-infrared AF (NIR-AF), emitted primarily from RPE melanin, is usually reduced or absent at fleck positions. METHODS: Flecks in SW- and NIR-AF images and spectral-domain optical coherence tomography (SD-OCT) scans were studied in 19 STGD1 patients carrying disease-causing ABCA4 mutations. Fleck spatial distribution and progression were recorded in serial AF images. RESULTS: Flecks observed in SW-AF images typically colocalized with darkened foci in NIR-AF images; the NIR-AF profiles were larger. The decreased NIR-AF signal from flecks preceded apparent changes in SW-AF. Spatiotemporal changes in fleck distribution usually progressed centrifugally, but in one case centripetal expansion was observed. Flecks in SW-AF images corresponded to hyperreflective deposits that progressively traversed photoreceptor-attributable bands in SD-OCT images. Outer nuclear layer (ONL) thickness negatively correlated with expansion of flecks from outer to inner retina. CONCLUSIONS: In the healthy retina, RPE lipofuscin fluorophores form in photoreceptor cells but are transferred to RPE; thus the SW-AF signal from photoreceptor cells is negligible. In STGD1, NIR-AF imaging reveals that flecks are predominantly hypofluorescent and larger and that NIR-AF darkening occurs prior to heightened SW-AF signal. These observations indicate that RPE cells associated with flecks in STGD1 are considerably changed or lost. Spectral-domain OCT findings are indicative of ongoing photoreceptor cell degeneration. The bright SW-AF signal of flecks likely originates from augmented lipofuscin formation in degenerating photoreceptor cells impaired by the failure of RPE.
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48 [IVS15&#fe;1G>A 2 M 12.00 Caucasian 0.5 0.5 p. [L541P; A1038V] 3* M 9.00 Caucasian 1 1 p. [W855*]; [T1526M] 4 F 47.55 Caucasian 1.3 1.3 p. [L541P; A1038V]; [G1961E] 5* F 16.47 Caucasian 0.6 0.6 p. [T972N]; [L2027F] 6* M 16.98 Caucasian 1.3 1.3 p. [K346T]; [T1117I] 7 F 23.80 Caucasian 0.6 0.4 p. [R1161S] 8* F 28.67 Caucasian 1.3 1.3 p. [P1380L]; [P1380L] 9 M 42.83 Caucasian 0.9 0.4 c.
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ABCA4 p.Arg1161Ser 26230768:48:297
status: NEW[hide] Quantitative Fundus Autofluorescence and Optical C... Invest Ophthalmol Vis Sci. 2015 Nov 1;56(12):7274-85. doi: 10.1167/iovs.15-17371. Duncker T, Stein GE, Lee W, Tsang SH, Zernant J, Bearelly S, Hood DC, Greenstein VC, Delori FC, Allikmets R, Sparrow JR
Quantitative Fundus Autofluorescence and Optical Coherence Tomography in ABCA4 Carriers.
Invest Ophthalmol Vis Sci. 2015 Nov 1;56(12):7274-85. doi: 10.1167/iovs.15-17371., [PMID:26551331]
Abstract [show]
PURPOSE: To assess whether carriers of ABCA4 mutations have increased RPE lipofuscin levels based on quantitative fundus autofluorescence (qAF) and whether spectral-domain optical coherence tomography (SD-OCT) reveals structural abnormalities in this cohort. METHODS: Seventy-five individuals who are heterozygous for ABCA4 mutations (mean age, 47.3 years; range, 9-82 years) were recruited as family members of affected patients from 46 unrelated families. For comparison, 57 affected family members with biallelic ABCA4 mutations (mean age, 23.4 years; range, 6-67 years) and two noncarrier siblings were also enrolled. Autofluorescence images (30 degrees , 488-nm excitation) were acquired with a confocal scanning laser ophthalmoscope equipped with an internal fluorescent reference. The gray levels (GLs) of each image were calibrated to the reference, zero GL, magnification, and normative optical media density to yield qAF. Horizontal SD-OCT scans through the fovea were obtained and the thicknesses of the outer retinal layers were measured. RESULTS: In 60 of 65 carriers of ABCA4 mutations (age range, 9-60), qAF levels were within normal limits (95% confidence level) observed for healthy noncarrier subjects, while qAF levels of affected family members were significantly increased. Perifoveal fleck-like abnormalities were observed in fundus AF images in four carriers, and corresponding changes were detected in the outer retinal layers in SD-OCT scans. Thicknesses of the outer retinal layers were within the normal range. CONCLUSIONS: With few exceptions, individuals heterozygous for ABCA4 mutations and between the ages of 9 and 60 years do not present with elevated qAF. In a small number of carriers, perifoveal fleck-like changes were visible.
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28 [L541P;A1038V] 0.10 0.10 OS n/a 141 S2.2 F 44.4 Indian Mother c.6729&#fe;5_&#fe;19del 0.10 0.00 OS 257 291 S2.3 M 56.2 Indian Father p.G1961E 0.00 0.00 OD 475 431 S3.4 F 54.1 White Mother p.G863A 0.00 0.00 OS 459 451 S3.5 F 82.0 White Grandmother p.G863A 0.00 0.00 OD n/a n/a S4.2 F 44.6 White Mother p.W855* 0.00 0.00 OD 330 n/a S4.3 M 40.9 White Father p.T1526M 0.00 0.00 OS 283 271 S5.2 F 71.5 White Sister p.C698Y 0.00 0.10 OD n/a n/a S5.3 F 67.5 White Sister c.2160&#fe;1G>C 0.00 0.00 OS n/a n/a S5.4 F 62.9 White Sister p.C698Y 0.00 0.00 OD n/a n/a S6.2 M 54.9 Black Brother p.T1526M 0.10 0.00 OS 477 423 S7.2 F 48.9 White Mother c.5196&#fe;1G>A 0.00 0.00 OS 443 415 S8.2 F 59.6 White Mother p.K346T 0.00 0.00 OD 546 483 S8.3 M 54.6 White Father p.T1117I 0.10 0.10 OD 289 n/a S9.2 F 51.5 White Mother c.5196&#fe;1137G>A 0.00 0.00 n/a 302 n/a S9.3 M 57.8 White Father p.C54Y 0.00 0.00 OS 419 375 S10.2 M 24.1 Indian Brother p.Q2220* 0.00 0.00 OD 227 227 S11.2 F 40.0 Asian Mother c.5923del 0.00 0.18 OD 229 191 S11.3 M 40.1 Asian Father p.R408* 0.00 0.00 OD 195 178 S12.2 F 53.2 White Mother p.L2027F 0.00 0.00 n/a 355 309 S13.2 F 49.8 White Mother p.R1161S 0.00 0.00 OS 367 372 S13.3 M 22.3 White Brother p.R1161S 0.00 0.00 OD 202 206 S14.2 F 67.0 White Mother p.P1380L 0.00 0.00 OD n/a n/a S14.3 F 24.4 White Sister p.P1380L 0.00 0.00 OS n/a 163 S15.3 F 26.8 White Sister c.3050&#fe;5G>A 0.00 0.00 n/a 293 281 S16.2 M 53.7 Black Father c.4253&#fe;5G>T 0.00 0.00 n/a n/a 204 S17.2 F 60.0 Hispanic Mother p.A1038V 0.00 0.00 n/a 247 n/a S18.2 F 41.8 Indian Father c.5917del 0.00 0.00 OD n/a 194 S18.3 M 48.6 Indian Mother c.859-9T>C 0.00 0.00 OD 253 215 S18.4 F 12.9 Indian Sister c.5917del 0.00 0.00 OD 84 93 S19.4 F 58.5 White Mother p.L2027F 0.00 0.00 OD 205 n/a S19.5 M 61.6 White Father p.G851D 0.10 0.10 OD n/a n/a S20.2 F 41.5 White Mother c.5312&#fe;1G>A 0.00 0.00 n/a 335 351 S20.3 M 39.0 White Father p.R2030* 0.00 0.10 n/a 442 n/a S21.3 F 53.1 White Mother p.G1961E 0.00 0.00 OD 490 488 S22.3 M 46.3 White Father p.L2027F 0.00 0.00 OS 386 376 S22.4 F 47.1 White Mother p.
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ABCA4 p.Arg1161Ser 26551331:28:1156
status: NEWX
ABCA4 p.Arg1161Ser 26551331:28:1213
status: NEW68 [66G>A;859-9T>C] p.Q2220* CF 1.30 n/a n/a P 11.1 M 15.0 Asian p.R408* c.5935del 1.10 1.30 n/a n/a P 12.1&#a7; M 15.1 White p.L2027F p.R2077W 0.80 0.80 728 697 P 13.1&#a7; F 23.8 White p.R1161S 0.60 0.40 571 647 P 14.1&#a7; F 27.3 White p.P1380L p.P1380L 1.30 1.00 n/a 577 P 15.1 M 17.0 White p.G1961E c.3050&#fe;5G>A 0.88 0.88 n/a n/a P 15.2 F 22.0 White p.G1961E c.3050&#fe;5G>A 0.88 0.88 n/a n/a P 16.1 F 19.1 Black p.V989A c.4253&#fe;5G>T 0.30 0.40 97 n/a P 17.1 F 21.8 Hispanic p.A1038V p.G1441D 0.70 0.88 551 528 P 18.1 M 22.0 Indian c.859-9T>C c.5917del 0.88 0.88 527 n/a P 19.1&#a7; F 27.2 White p.G851D p.L2027F 0.88 0.88 448 459 P 19.2&#a7; F 29.2 White p.G851D p.L2027F 1.30 1.18 538 569 P 19.3 F 34.2 White p.G851D p.L2027F 1.00 1.30 442 n/a P 20.1 F 9.5 White c.5312&#fe;1G>A p.R2030* 0.88 0.70 998 929 P 21.1ߤ F 24.6 White p.N96D p.G1961E 0.30 0.18 513 549 P 21.2ߤ F 20.9 White p.N96D p.G1961E 0.30 0.40 397 355 P 22.1 M 8.0 White p.
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ABCA4 p.Arg1161Ser 26551331:68:186
status: NEW