| 발표일자: |
2013년 4월 20일(토) ~ 21일(일) |
| 발표시간: |
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| 발표번호: |
P(e-poster)-054 |
| 발표장소: |
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| Disruption of the Human Cone Photoreceptor Mosaic from a Defect in NR2E3 Transcription Factor Function |
| 한림대학교 강동성심병원 안과학 교실(1), 콜림비아대학교 병원 안과학 교실(2) |
| 홍인환(1), Winston Lee(2), Jason Horowitz(2), Rando Allikmets(2), Stephen H. Tsang(2), Stanley Chang(2), 박성표(1,2) |
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목적 : Enhanced S-cone syndrome is an orphan disease caused by mutations in the NR2E3 gene which result in an increased number of S-cones overpopulating the retina. Although the characteristic onset of enhanced S-cone syndrome can be well documented by current ophthalmic imaging modalities, techniques fail to provide sufficient details regarding the microstructure of photoreceptors in retinal diseases. Adaptive optics (AO) provides a unique opportunity to analyze the effects of genetic mutations on photoreceptors by compensating aberrations of human eyes.
방법 : Three eyes of three patients with enhanced S-cone syndrome were studied by clinical examination, genetic screening, FAF imaging, SD-OCT, and ERG. Cone mosaic imaging was accomplished by an AO-SLO equipped with a dual crystal on silicon spatial light modulator. Qualitative image analyses and genetic findings were investigated in each patient.
결과 : The Diagnosis of patient was confirmed by ERG finding. Genetic screening confirmed the presence of two disease-causing mutations in the NR2E3 gene in each study patient, as well as identified a novel mutation (202 A>G, S68G). Fundus photograph, FAF and SD-OCT found rosette-like lesion within the mid-periphery along the vascular arcades of the retina. In all AO-SLO images of patients, sparse distribution and asymmetric size of cone mosaic pattern were found within central retina. There were regions of dark space between groups of photoreceptors, distinguishable from shadowing and artifacts.
결론 : AO-SLO provided an in-depth window into the retina of live enhanced S-cone syndrome patients beyond the ability of other current imaging modalities. Dark lesions within the central retina in each patient contain structurally dysfunctional cones which account for retinal mosaic disorganization and may predispose affected areas to other abnormalities such as rosette lesions. AO-SLO can be an efficient diagnostic tool in clinics for examining cellular-level pathologies in various retinal dystrophies.
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