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Glare prediction and mechanism of adaptation following implantation of hydrophilic and hydrophobic intraocular lenses 眩光预测和植入亲水性和疏水性眼内透镜后的适应机制
Pub Date : 2024-04-25 DOI: 10.3389/fopht.2024.1310468
Gurpreet K. Bhogal-Bhamra, Maana Aujla, Sai Kolli, Amy L Sheppard, J. Wolffsohn
Glare is a known side effect of intraocular lens (IOL) implantation, affected principally by IOL material and optics, although it is reported subjectively to decrease in impact with time. However, little objective data have been published on changes over time, how these relate to subjective reports, and whether those who will report greater glare symptoms can be predicted prior to IOL implantation.A total of 32 patients (aged 72.4 ± 8.0 years) with healthy eyes were implanted bilaterally with hydrophilic 600s (Rayner, Worthing, UK) or hydrophobic Acrysof (Alcon, Texas, USA) acrylic IOLs (n = 16 each, randomly assigned). Each patient reported their dysphotopsia symptoms subjectively using the validated forced choice photographic questionnaire for photic phenomena, and halo size resulting from a bright light in a dark environment was quantified objectively in eight orientations using the Aston Halometer. Assessment was performed binocularly pre-operatively and at 1, 2, 3, and 4 weeks after IOL implantation.The study was carried out at the National Health Service Ophthalmology Department, Queen Elizabeth Hospital, Birmingham, UK.Visual acuity (average 0.37 ± 0.26 logMAR) did not correlate with subjective glare (r = 0.184, p = 0.494) or objective glare (r = 0.294, p = 0.270) pre-surgery. Objective halo size (F = 112.781, p < 0.001) decreased with cataract removal and IOL implantation and continued to decreased over the month after surgery. Subjective dysphotopsia complaints (p < 0.001) were also greater pre-surgery, but did not change thereafter (p = 0.228). In neither case was there a difference with IOL material (p > 0.05). It was not possible to predict post-surgery dysphotopsia from symptoms or a ratio of symptoms to halo size pre-surgery (p > 0.05).Subjective dysphotopsia and objective halos caused by cataracts are greatly reduced by implantation of IOL after cataract removal causing few perceivable symptoms. However, objective measures are able to quantify a further reduction in light scatter over the first month post-IOL implantation, suggesting that any subjective effects over this period are due to the healing process and not due to neuroadaptation.
众所周知,眩光是眼内人工晶体(IOL)植入术的副作用之一,主要受人工晶体材料和光学器件的影响,不过据主观报告,眩光的影响会随着时间的推移而减弱。共有 32 名眼部健康的患者(年龄为 72.4 ± 8.0 岁)接受了双侧亲水性 600s(Rayner,英国沃辛)或疏水性 Acrysof(Alcon,美国德克萨斯州)丙烯酸人工晶体植入术(各 16 人,随机分配)。每位患者都使用经过验证的光现象强迫选择摄影问卷主观地报告了他们的视力障碍症状,并使用阿斯顿光晕计在八个方向上客观地量化了黑暗环境中的亮光所产生的光晕大小。视力(平均 0.37 ± 0.26 logMAR)与手术前的主观眩光(r = 0.184,p = 0.494)或客观眩光(r = 0.294,p = 0.270)无相关性。客观光晕大小(F = 112.781,p < 0.001)随着白内障摘除和人工晶体植入而减小,并在术后一个月内持续减小。主观视力障碍投诉(p < 0.001)在手术前也较大,但手术后没有变化(p = 0.228)。人工晶体材料也没有差异(p > 0.05)。白内障摘除术后植入人工晶体后,由白内障引起的主观视力障碍和客观光晕会大大减少,几乎不会出现可感知的症状。然而,客观测量能够量化人工晶体植入后第一个月内光散射的进一步减少,这表明这一时期内的任何主观影响都是由于愈合过程而非神经适应所致。
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引用次数: 0
Case report: A severe case of zoledronate-associated diffuse orbital inflammation and uveitis in a patient with metastatic breast cancer 病例报告:一例严重的唑来膦酸盐相关性弥漫性眼眶炎和葡萄膜炎病例(转移性乳腺癌患者
Pub Date : 2024-04-24 DOI: 10.3389/fopht.2024.1372429
Pushpinder Kanda, Isaura Guerrero-Córdova, Jobanpreet Dhillon, Adrian Tsang
Zoledronate is a commonly prescribed medication to maintain bone health; however, a rare side effect includes ocular inflammation. We report a case of simultaneous anterior uveitis and orbital inflammation associated with zoledronate infusion in a patient with metastatic breast cancer. We also performed a literature search to provide an up-to-date summary of cases with zoledronate-associated ocular inflammation.This is a case report with literature review. Literature search (timeline 2010 to 2023) was performed using PubMed with the search team: (zoledronate) AND (uveitis OR scleritis OR orbital inflammation OR ocular inflammation).A 48-year-old female presented with left eye pain, swelling, and decreased vision 2 days after receiving zoledronic acid infusion. An ophthalmic exam showed non-granulomatous anterior uveitis. CT orbits and ocular ultrasound showed signs of posterior scleritis and orbital inflammation. Ocular inflammation caused by an infection or metastatic cancer was ruled out. The patient was treated with both topical and systemic corticosteroids. Complete resolution of the inflammation occurred after 2.5 weeks.Orbital inflammation and uveitis are an uncommon side effect of zoledronate but needs to be promptly recognized and treated to prevent sight-threatening complications.
唑来膦酸钠是一种维持骨骼健康的常用处方药,但其罕见的副作用包括眼部炎症。我们报告了一例转移性乳腺癌患者在输注唑来膦酸钠后同时出现前葡萄膜炎和眼眶炎的病例。我们还进行了文献检索,以提供唑来膦酸钠相关眼部炎症病例的最新摘要。我们使用 PubMed 进行了文献检索(时间轴为 2010 年至 2023 年),检索组为:(唑来膦酸盐)和(葡萄膜炎或巩膜炎或眼眶炎或眼部炎症)。一名 48 岁的女性在接受唑来膦酸输注 2 天后出现左眼疼痛、肿胀和视力下降。眼科检查显示为非肉芽肿性前葡萄膜炎。眼眶 CT 和眼部超声波检查显示有后巩膜炎和眶炎症状。排除了感染或转移性癌症引起的眼部炎症。患者接受了局部和全身皮质类固醇治疗。眼眶炎症和葡萄膜炎是唑来膦酸钠不常见的副作用,但需要及时识别和治疗,以防止出现危及视力的并发症。
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引用次数: 0
A novel multi-ingredient supplement significantly improves ocular symptom severity and tear production in patients with dry eye disease: results from a randomized, placebo-controlled clinical trial 一种新型多成分补充剂可明显改善干眼症患者眼部症状的严重程度和泪液分泌:一项随机安慰剂对照临床试验的结果
Pub Date : 2024-04-24 DOI: 10.3389/fopht.2024.1362113
Neda Gioia, Jeffry Gerson, Robert Ryan, Krista Barbour, Julie Poteet, Brooke Jennings, Matthew Sharp, Ryan Lowery, Jacob Wilson, Abhijeet Morde, Deshanie Rai, M. Padigaru, L. Periman
Dry eye disease (DED) is multifactorial and characterized by a loss of tear film homeostasis that causes a cycle of tear film instability, tear hyperosmolarity, and inflammation. While artificial tears are the traditional mainstay of treatment, addressing the underlying pathophysiology could relieve symptoms and prevent progression. Increasing evidence indicates a role for oral nutritional supplementation in multiple ophthalmic diseases, including DED. Lutein, zeaxanthin, curcumin, and vitamin D3 have demonstrated protective and anti-inflammatory properties in ocular models. This prospective, randomized, double-blind, parallel, placebo-controlled study evaluated the efficacy and safety of a proprietary blend of lutein, zeaxanthin isomers, curcumin, and vitamin D3 (LCD) as a daily supplement in adult participants with DED.Participants were randomized to receive one LCD supplement capsule (lutein 20 mg, zeaxanthin isomers 4 mg, curcumin 200 mg curcuminoids, and vitamin D3 600 IU) or placebo per day for 8 weeks (LCD, n=77; placebo, n=78). Primary outcomes were changes in tear volume (Schirmer’s test) and ocular symptoms (Ocular Surface Disease Index [OSDI]).The study met its primary endpoints: the LCD group demonstrated significantly better Schirmer’s test scores and improvement in overall OSDI score, versus placebo, at Day 56 (p<0.001 for both). Scores for total OSDI, and symptoms and vision domains, significantly improved by Day 14 for LCD versus placebo, (p<0.05 for all) and were maintained to Day 56 (p<0.001). In addition, the LCD group demonstrated significantly improved tear film break-up time (TBUT) and tear film osmolarity, versus placebo, by Day 56 (p<0.001), along with significant improvements in corneal and conjunctival staining (p<0.001 for both), and inflammation (matrix metalloproteinase-9; p<0.001 for each eye). Total Standard Patient Evaluation of Eye Dryness (SPEED) score, and scores for the frequency and severity domains, were significantly improved by Day 14 for LCD versus placebo (p<0.05 for all) and maintained to Day 56 (p<0.001). There was no difference between groups for artificial tear usage. The supplement was well-tolerated.Once-daily LCD supplementation significantly improved tear production, stability and quality, reduced ocular surface damage and inflammation, and improved participants’ symptoms. LCD supplementation could offer a useful adjunct to artificial tears for patients with DED (NCT05481450).
干眼症(DED)是由多种因素引起的,其特点是泪膜失去平衡,造成泪膜不稳定、泪液高渗和炎症的循环。虽然人工泪液是传统的主要治疗方法,但解决根本的病理生理学问题可以缓解症状并防止病情恶化。越来越多的证据表明,口服营养补充剂在包括 DED 在内的多种眼科疾病中发挥作用。叶黄素、玉米黄质、姜黄素和维生素 D3 在眼部模型中表现出保护和抗炎作用。这项前瞻性、随机、双盲、平行、安慰剂对照研究评估了叶黄素、玉米黄质异构体、姜黄素和维生素 D3(LCD)专有混合物作为 DED 成人每日补充剂的有效性和安全性。参与者被随机分配到每天服用一粒LCD补充剂(叶黄素20毫克、玉米黄质异构体4毫克、姜黄素200毫克、维生素D3 600 IU)或安慰剂,连续服用8周(LCD,77人;安慰剂,78人)。研究达到了主要终点:与安慰剂相比,LCD组在第56天的Schirmer测试得分和OSDI总分均有显著改善(两者的P<0.001)。与安慰剂相比,LCD 组的 OSDI 总分、症状和视力领域的得分在第 14 天有明显改善(均为 p<0.05),并持续到第 56 天(p<0.001)。此外,与安慰剂相比,LCD 组的泪膜破裂时间(TBUT)和泪膜渗透压在第 56 天有明显改善(p<0.001),角膜和结膜染色也有明显改善(均为 p<0.001),炎症(基质金属蛋白酶-9;每只眼睛均为 p<0.001)也有明显改善。到第 14 天,LCD 与安慰剂相比,眼干标准患者评估(SPEED)总分以及频率和严重程度领域的分数均有显著改善(均为 p<0.05),并维持到第 56 天(p<0.001)。在人工泪液的使用方面,组间没有差异。补充液的耐受性良好。每天补充一次 LCD 能显著改善泪液的分泌、稳定性和质量,减少眼表损伤和炎症,改善参与者的症状。对DED患者来说,补充LCD可作为人工泪液的一种有效辅助疗法(NCT05481450)。
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引用次数: 0
Multimodal in-vivo maps as a tool to characterize retinal structural biomarkers for progression in adult-onset Stargardt disease 以多模态活体图为工具,确定成年期斯达加特病进展的视网膜结构生物标志物特征
Pub Date : 2024-04-23 DOI: 10.3389/fopht.2024.1384473
H. R. Pedersen, S. Gilson, L. Hagen, Josephine Prener Holtan, R. Bragadóttir, R. Baraas
To characterize retinal structural biomarkers for progression in adult-onset Stargardt disease from multimodal retinal imaging in-vivo maps.Seven adult patients (29–69 years; 3 males) with genetically-confirmed and clinically diagnosed adult-onset Stargardt disease and age-matched healthy controls were imaged with confocal and non-confocal Adaptive Optics Scanning Light Ophthalmoscopy (AOSLO), optical coherence tomography (OCT), fundus infrared (FIR), short wavelength-autofluorescence (FAF) and color fundus photography (CFP). Images from each modality were scaled for differences in lateral magnification before montages of AOSLO images were aligned with en-face FIR, FAF and OCT scans to explore changes in retinal structure across imaging modalities. Photoreceptors, retinal pigment epithelium (RPE) cells, flecks, and other retinal alterations in macular regions were identified, delineated, and correlated across imaging modalities. Retinal layer-thicknesses were extracted from segmented OCT images in areas of normal appearance on clinical imaging and intact outer retinal structure on OCT. Eccentricity dependency in cell density was compared with retinal thickness and outer retinal layer thickness, evaluated across patients, and compared with data from healthy controls.In patients with Stargardt disease, alterations in retinal structure were visible in different image modalities depending on layer location and structural properties. The patients had highly variable foveal structure, associated with equally variable visual acuity (-0.02 to 0.98 logMAR). Cone and rod photoreceptors, as well as RPE-like structures in some areas, could be quantified on non-confocal split-detection AOSLO images. RPE cells were also visible on dark field AOSLO images close to the foveal center. Hypo-reflective gaps of non-waveguiding cones (dark cones) were seen on confocal AOSLO in regions with clinically normal CFP, FIR, FAF and OCT appearance and an intact cone inner segment mosaic in three patients.Dark cones were identified as a possible first sign of retinal disease progression in adult-onset Stargardt disease as these are observed in retinal locations with otherwise normal appearance and outer retinal thickness. This corroborates a previous report where dark cones were proposed as a first sign of progression in childhood-onset Stargardt disease. This also supports the hypothesis that, in Stargardt disease, photoreceptor degeneration occurs before RPE cell death.
通过体内多模态视网膜成像图确定成年型斯塔加特病进展的视网膜结构生物标志物。通过共焦和非共焦自适应光学扫描光眼底镜 (AOSLO)、光学相干断层扫描 (OCT)、眼底红外 (FIR)、短波长自动荧光 (FAF) 和彩色眼底照相 (CFP) 对 7 名经遗传学确诊和临床诊断为成人型斯达加特病的成年患者(29-69 岁;3 名男性)和年龄匹配的健康对照组进行了成像。在将 AOSLO 图像蒙太奇与正面红外、FAF 和 OCT 扫描图像对齐之前,会根据横向放大率的差异对每种成像模式的图像进行缩放,以探索不同成像模式下视网膜结构的变化。对黄斑区域的感光细胞、视网膜色素上皮(RPE)细胞、斑点和其他视网膜改变进行识别、划分,并在不同成像模式之间进行关联。在临床成像显示外观正常、OCT 显示视网膜外层结构完整的区域,从分割的 OCT 图像中提取视网膜层厚。细胞密度的偏心依赖性与视网膜厚度和视网膜外层厚度进行了比较,对不同患者进行了评估,并与健康对照组的数据进行了比较。患者的眼窝结构变化很大,视力也同样变化很大(-0.02 至 0.98 logMAR)。锥体和杆状光感受器以及某些区域的 RPE 样结构可在非聚焦分裂检测 AOSLO 图像上量化。在靠近眼窝中心的暗视野 AOSLO 图像上也能看到 RPE 细胞。在临床上CFP、FIR、FAF和OCT外观正常的区域以及三名患者的完整锥体内节镶嵌中,共焦AOSLO上可以看到非导波锥体的低反射间隙(暗锥体)。暗锥体被确定为成年型Stargardt病视网膜疾病进展的第一个信号,因为在外观和视网膜外层厚度正常的视网膜位置可以观察到这些暗锥体。这与之前的一份报告相吻合,该报告认为暗色锥体是儿童期斯达加特病发展的第一个征兆。这也支持了一种假设,即在斯塔加特病中,光感受器变性发生在 RPE 细胞死亡之前。
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引用次数: 0
Editorial: Insights in surgical ophthalmology: 2023 社论:眼科手术透视:2023 年
Pub Date : 2024-04-17 DOI: 10.3389/fopht.2024.1407362
Yongwei Guo, Ludwig M. Heindl
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引用次数: 0
Brief research report: ETS-1 blockade increases ICAM-1 expression in activated human retinal endothelial cells 简要研究报告:阻断ETS-1可增加活化的人视网膜内皮细胞中ICAM-1的表达
Pub Date : 2024-04-16 DOI: 10.3389/fopht.2024.1384428
A. Tan, Yuefang Ma, B. Appukuttan, Karen Lower, Amanda L. Lumsden, Michael Z. Michael, Justine R. Smith, Liam M Ashander
Intercellular adhesion molecule 1 (ICAM-1) is a central cell adhesion molecule for retinal transendothelial migration of the leukocytes in non-infectious posterior uveitis. Inhibiting ICAM1 gene transcription reduces induction of ICAM-1 in inflamed retinal endothelium. Based on published literature implicating transcription factor ETS-1 as an activator of ICAM1 gene transcription, we investigated the effect of ETS-1 blockade on ICAM-1 levels in cytokine-stimulated human retinal endothelial cells. We first examined ICAM1 and ETS1 transcript expression in human retinal endothelial cells exposed to tumor necrosis factor-alpha (TNF-α) or interleukin-1beta (IL-1β). ICAM1 and ETS1 transcripts were increased in parallel in primary human retinal endothelial cell isolates (n = 5) after a 4-hour stimulation with TNF-α or IL-1β (p ≤ 0.012 and ≤ 0.032, respectively). We then assessed the effect of ETS-1 blockade by small interfering (si)RNA on cellular ICAM1 transcript and membrane-bound ICAM-1 protein. ETS1 transcript was reduced by greater than 90% in cytokine-stimulated and non-stimulated human retinal endothelial cell monolayers following a 48-hour treatment with two ETS-1-targeted siRNA, in comparison to negative control non-targeted siRNA (p ≤ 0.0002). The ETS-1 blockade did not reduce ICAM1 transcript expression nor levels of membrane-bound ICAM-1 protein, rather it increased both for a majority of siRNA-treatment and cytokine-stimulation conditions (p ≤ 0.018 and ≤ 0.004, respectively). These unexpected findings indicate that ETS-1 blockade increases ICAM-1 transcript and protein levels in human retinal endothelial cells. Thus ETS-1-targeting would be expected to promote rather than inhibit retinal transendothelial migration of leukocytes in non-infectious posterior uveitis.
细胞间粘附分子 1(ICAM-1)是非感染性后葡萄膜炎中白细胞经视网膜内皮迁移的核心细胞粘附分子。抑制 ICAM1 基因转录可减少炎症视网膜内皮对 ICAM-1 的诱导。根据已发表的文献,转录因子 ETS-1 是 ICAM1 基因转录的激活因子,我们研究了阻断 ETS-1 对细胞因子刺激的人视网膜内皮细胞中 ICAM-1 水平的影响。我们首先检测了暴露于肿瘤坏死因子-α(TNF-α)或白细胞介素-1β(IL-1β)的人视网膜内皮细胞中 ICAM1 和 ETS1 的转录表达。原代人视网膜内皮细胞分离物(n = 5)在受到 TNF-α 或 IL-1β 4 小时刺激后,ICAM1 和 ETS1 转录物同时增加(p 分别≤ 0.012 和≤ 0.032)。然后,我们评估了通过小干扰(si)RNA阻断ETS-1对细胞ICAM1转录本和膜结合ICAM-1蛋白的影响。与阴性对照非靶向 siRNA 相比,两种 ETS-1 靶向 siRNA 处理 48 小时后,细胞因子刺激和非刺激人视网膜内皮细胞单层中的 ETS1 转录减少了 90% 以上(p ≤ 0.0002)。在大多数 siRNA 处理和细胞因子刺激条件下,ETS-1 的阻断并没有降低 ICAM1 转录本的表达或膜结合 ICAM-1 蛋白的水平,反而两者都有所增加(p 分别≤ 0.018 和≤ 0.004)。这些意想不到的发现表明,ETS-1 阻断会增加人视网膜内皮细胞中 ICAM-1 的转录和蛋白水平。因此,在非感染性后葡萄膜炎中,ETS-1靶向疗法有望促进而非抑制白细胞经视网膜内皮迁移。
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引用次数: 0
Multi-tissue transcriptome-wide association study identifies novel candidate susceptibility genes for cataract 多组织全转录组关联研究发现白内障新的候选易感基因
Pub Date : 2024-04-16 DOI: 10.3389/fopht.2024.1362350
Hélène Choquet, Matthieu Duot, Victor A. Herrera, Sanjaya K. Shrestha, Travis J. Meyers, Thomas J. Hoffmann, P. Sangani, S. Lachke
Cataract is the leading cause of blindness among the elderly worldwide. Twin and family studies support an important role for genetic factors in cataract susceptibility with heritability estimates up to 58%. To date, 55 loci for cataract have been identified by genome-wide association studies (GWAS), however, much work remains to identify the causal genes. Here, we conducted a transcriptome-wide association study (TWAS) of cataract to prioritize causal genes and identify novel ones, and examine the impact of their expression.We performed tissue-specific and multi-tissue TWAS analyses to assess associations between imputed gene expression from 54 tissues (including 49 from the Genotype Tissue Expression (GTEx) Project v8) with cataract using FUSION software. Meta-analyzed GWAS summary statistics from 59,944 cataract cases and 478,571 controls, all of European ancestry and from two cohorts (GERA and UK Biobank) were used. We then examined the expression of the novel genes in the lens tissue using the iSyTE database.Across tissue-specific and multi-tissue analyses, we identified 99 genes for which genetically predicted gene expression was associated with cataract after correcting for multiple testing. Of these 99 genes, 20 (AC007773.1, ANKH, ASIP, ATP13A2, CAPZB, CEP95, COQ6, CREB1, CROCC, DDX5, EFEMP1, EIF2S2, ESRRB, GOSR2, HERC4, INSRR, NIPSNAP2, PICALM, SENP3, and SH3YL1) did not overlap with previously reported cataract-associated loci. Tissue-specific analysis identified 202 significant gene-tissue associations for cataract, of which 166 (82.2%), representing 9 unique genes, were attributed to the previously reported 11q13.3 locus. Tissue-enrichment analysis revealed that gastrointestinal tissues represented one of the highest proportions of the Bonferroni-significant gene-tissue associations (21.3%). Moreover, this gastrointestinal tissue type was the only anatomical category significantly enriched in our results, after correcting for the number of tissue donors and imputable genes for each reference panel. Finally, most of the novel cataract genes (e.g., Capzb) were robustly expressed in iSyTE lens data.Our results provide evidence of the utility of imputation-based TWAS approaches to characterize known GWAS risk loci and identify novel candidate genes that may increase our understanding of cataract etiology. Our findings also highlight the fact that expression of genes associated with cataract susceptibility is not necessarily restricted to lens tissue.
白内障是全球老年人失明的主要原因。双生子和家族研究表明,遗传因素在白内障易感性中起着重要作用,其遗传率估计高达 58%。迄今为止,全基因组关联研究(GWAS)已确定了 55 个白内障基因位点,但要确定致病基因还有很多工作要做。我们使用 FUSION 软件进行了组织特异性和多组织 TWAS 分析,以评估 54 个组织(包括基因型组织表达(GTEx)项目 v8 中的 49 个组织)的估算基因表达与白内障之间的关联。我们对来自两个队列(GERA 和英国生物库)的 59,944 例白内障病例和 478,571 例对照进行了元分析 GWAS 统计摘要。然后,我们使用 iSyTE 数据库检测了新基因在晶状体组织中的表达情况。通过组织特异性分析和多组织分析,我们确定了 99 个基因,在校正多重检验后,这些基因的基因预测表达与白内障有关。在这 99 个基因中,有 20 个(AC007773.1、ANKH、ASIP、ATP13A2、CAPZB、CEP95、COQ6、CREB1、CROCC、DDX5、EFEMP1、EIF2S2、ESRRB、GOSR2、HERC4、INSRR、NIPSNAP2、PICALM、SENP3 和 SH3YL1)与之前报道的白内障相关基因位点不重叠。组织特异性分析发现了 202 个与白内障有显著关联的基因-组织,其中 166 个(82.2%)(代表 9 个独特的基因)归因于之前报道的 11q13.3 基因座。组织富集分析显示,胃肠道组织是 Bonferroni 显著基因-组织关联比例最高的组织之一(21.3%)。此外,在校正了组织供体数量和每个参考面板的可归因基因后,胃肠道组织类型是我们的研究结果中唯一显著富集的解剖类别。最后,大多数新型白内障基因(如 Capzb)都在 iSyTE 晶状体数据中得到了稳健表达。我们的研究结果证明了基于归因的 TWAS 方法在描述已知 GWAS 风险位点和鉴定新型候选基因方面的实用性,这些基因可能会增加我们对白内障病因学的了解。我们的研究结果还强调了一个事实,即与白内障易感性相关的基因表达并不一定局限于晶状体组织。
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引用次数: 0
The effect of sampling window size on topographical maps of foveal cone density 取样窗口大小对眼窝视锥密度地形图的影响
Pub Date : 2024-04-09 DOI: 10.3389/fopht.2024.1348950
E. Warr, Jenna Grieshop, Robert F Cooper, Joseph Carroll
To characterize the effect of sampling window size on maps of foveal cone density derived from adaptive optics scanning light ophthalmoscope (AOSLO) images of the cone mosaic.Forty-four AOSLO-derived montages of the foveal cone mosaic (300 x 300µm) were used for this study (from 44 individuals with normal vision). Cone photoreceptor coordinates were semi-automatically identified by one experienced grader. From these coordinates, cone density matrices across each foveal montage were derived using 10 different sampling window sizes containing 5, 10, 15, 20, 40, 60, 80, 100, 150, or 200 cones. For all 440 density matrices, we extracted the location and value of peak cone density (PCD), the cone density centroid (CDC) location, and cone density at the CDC.Across all window sizes, PCD values were larger than those extracted at the CDC location, though the difference between these density values decreased as the sampling window size increased (p<0.0001). Overall, both PCD (r=-0.8099, p=0.0045) and density at the CDC (r=-0.7596, p=0.0108) decreased with increasing sampling window size. This reduction was more pronounced for PCD, with a 27.8% lower PCD value on average when using the 200-cone versus the 5-cone window (compared to only a 3.5% reduction for density at the CDC between these same window sizes). While the PCD and CDC locations did not occur at the same location within a given montage, there was no significant relationship between this PCD-CDC offset and sampling window size (p=0.8919). The CDC location was less variable across sampling windows, with an average per-participant 95% confidence ellipse area across the 10 window sizes of 47.56µm² (compared to 844.10µm² for the PCD location, p<0.0001).CDC metrics appear more stable across varying sampling window sizes than PCD metrics. Understanding how density values change according to the method used to sample the cone mosaic may facilitate comparing cone density data across different studies.
本研究使用了 44 幅从自适应光学扫描光眼底镜(AOSLO)获得的眼窝锥体镶嵌图像(300 x 300 微米)的 AOSLO 蒙太奇(来自 44 名视力正常的个体)。锥体光感受器坐标由一名经验丰富的分级员半自动确定。根据这些坐标,使用包含 5、10、15、20、40、60、80、100、150 或 200 个锥体的 10 种不同取样窗口大小,得出每个眼窝蒙太奇的锥体密度矩阵。在所有 440 个密度矩阵中,我们提取了锥体密度峰值 (PCD) 的位置和值、锥体密度中心点 (CDC) 的位置以及 CDC 处的锥体密度。总体而言,随着采样窗口尺寸的增大,PCD(r=-0.8099,p=0.0045)和 CDC 处的密度(r=-0.7596,p=0.0108)都有所下降。对于 PCD 而言,这种降低更为明显,使用 200 锥体窗口与 5 锥体窗口相比,PCD 值平均降低了 27.8%(相比之下,在相同窗口尺寸下,CDC 密度仅降低了 3.5%)。虽然在给定的蒙太奇中,PCD 和 CDC 的位置不在同一位置,但 PCD-CDC 偏移与采样窗口大小之间没有显著关系(p=0.8919)。CDC位置在不同采样窗口之间的变化较小,在10个窗口大小中,每个参与者的平均95%置信椭圆面积为47.56µm²(而PCD位置的置信椭圆面积为844.10µm²,p<0.0001)。了解密度值如何随着锥体镶嵌取样方法的不同而变化,有助于比较不同研究的锥体密度数据。
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引用次数: 0
Unraveling the functional signals of rods and cones in the human retina: separation and analysis 揭示人类视网膜中视杆细胞和视锥细胞的功能信号:分离与分析
Pub Date : 2024-04-08 DOI: 10.3389/fopht.2024.1340692
C. Pfäffle, L. Puyo, H. Spahr, Dierck Hillmann, Yoko Miura, G. Hüttmann
In recent years, optoretinography has become an important functional imaging method for the retina, as light-evoked changes in the photoreceptors have been demonstrated for a large number of different OCT systems. Full-field swept-source optical coherence tomography (FF-SS-OCT) is particularly phase-stable, and it is currently the only technique sensitive enough to detect the smaller functional changes in the inner plexiform layer (IPL). However, the resolution of state-of-the art FF-SS-OCT systems is not high enough to distinguish individual photoreceptors. This makes it difficult to separate rods from cones. In this work, we circumvent this problem by separating the functional changes in rods and cones by their different temporal dynamics to the same light stimulus. For this purpose, a mathematical model was developed that represents the measured signals as a superposition of two impulse responses. The developed model describes the measured data under different imaging conditions very well and is able to analyze the sensitivity and temporal dynamics of the two photoreceptor types separately.
近年来,光视网膜成像已成为视网膜的一种重要功能成像方法,因为大量不同的光学相干断层扫描系统都已证实了光诱发的感光器变化。全场扫源光学相干断层扫描(FF-SS-OCT)的相位稳定性特别好,是目前唯一一种灵敏度足以检测内丛状层(IPL)较小功能变化的技术。然而,最先进的 FF-SS-OCT 系统分辨率不够高,无法区分单个光感受器。这就很难将视杆细胞和锥体细胞区分开来。在这项研究中,我们通过区分视杆细胞和视锥细胞对同一光刺激的不同时间动态变化来解决这一问题。为此,我们建立了一个数学模型,将测量到的信号表示为两个脉冲响应的叠加。所建立的模型能很好地描述不同成像条件下的测量数据,并能分别分析两种感光器的灵敏度和时间动态。
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引用次数: 0
Elevated tumor necrosis factor alpha and vascular endothelial growth factor in intermediate age-related macular degeneration and geographic atrophy 中度老年性黄斑变性和地理萎缩中肿瘤坏死因子α和血管内皮生长因子的升高
Pub Date : 2024-03-26 DOI: 10.3389/fopht.2024.1356957
Vivian Rajeswaren, Brandie D. Wagner, Jennifer L. Patnaik, N. Mandava, M. Mathias, N. Manoharan, Talisa E. de Carlo Forest, Ramya Gnanaraj, Anne M. Lynch, A. Palestine
Tumor necrosis factor alpha (TNF-α) is an inflammatory cytokine implicated in pathological changes to the retinal pigment epithelium that are similar to changes in geographic atrophy (GA), an advanced form of age related macular degeneration (AMD). TNF-α also modulates expression of other cytokines including vascular endothelial growth factor (VEGF), leading to choroidal atrophy in models of AMD. The purpose of this study was to investigate systemic TNF-α and VEGF in patients with GA and intermediate AMD (iAMD) compared to controls without AMD.We examined plasma levels of TNF-α and VEGF in patients with GA, iAMD, and controls without AMD from the University of Colorado AMD registry (2014 to 2021). Cases and controls were characterized by multimodal imaging. TNF-α and VEGF were measured via multiplex immunoassay and data were analyzed using a non-parametric rank based linear regression model fit to plasma biomarkers.There were 97 GA, 199 iAMD patients and 139 controls. TNF-α was significantly increased in GA (Median:9.9pg/ml, IQR:7.3-11.8) compared to iAMD (Median:7.4, IQR:5.3-9.1) and in both GA and iAMD compared to controls (Median:6.4, IQR:5.3-7.8), p<0.01 for all comparisons. VEGF was significantly increased in iAMD (Median:8.9, IQR:4.8-14.3) compared to controls (Median:7.7, IQR:4.6-11.1), p<0.01. There was a significant positive correlation between TNF-α and VEGF in GA (0.46, p<0.01), and iAMD (0.20, p=0.01) with no significant interaction between TNF-α and VEGF in any group.These findings suggest TNF-α and VEGF may contribute to systemic inflammatory processes associated with iAMD and GA. TNF-α and VEGF may function as systemic biomarkers for disease development.
肿瘤坏死因子α(TNF-α)是一种炎性细胞因子,与视网膜色素上皮的病理变化有关,这种病理变化与老年性黄斑变性(AMD)的晚期形式--地理萎缩(GA)的变化相似。TNF-α 还能调节包括血管内皮生长因子(VEGF)在内的其他细胞因子的表达,导致 AMD 模型中脉络膜萎缩。我们研究了科罗拉多大学 AMD 登记(2014 年至 2021 年)中 GA、iAMD 患者和无 AMD 对照组的 TNF-α 和 VEGF 血浆水平。病例和对照组通过多模态成像进行特征描述。TNF-α和血管内皮生长因子是通过多重免疫测定法测定的,数据采用与血浆生物标志物相匹配的非参数秩线性回归模型进行分析。与 iAMD(中位数:7.4,IQR:5.3-9.1)相比,GA(中位数:9.9pg/ml,IQR:7.3-11.8)的 TNF-α 明显升高;与对照组(中位数:6.4,IQR:5.3-7.8)相比,GA 和 iAMD 的 TNF-α 均明显升高,所有比较的 p 均<0.01。与对照组(中位数:7.7,IQR:4.6-11.1)相比,iAMD 的血管内皮生长因子明显增加(中位数:8.9,IQR:4.8-14.3),p<0.01。在GA(0.46,p<0.01)和iAMD(0.20,p=0.01)中,TNF-α和血管内皮生长因子之间存在明显的正相关,而在任何组别中,TNF-α和血管内皮生长因子之间均无明显的交互作用。这些研究结果表明,TNF-α和血管内皮生长因子可能有助于与iAMD和GA相关的全身炎症过程。
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引用次数: 0
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Frontiers in Ophthalmology
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