International journal of ophthalmology最新文献

Aim: To identify key genes and inflammatory signaling pathways involved in the anti-inflammatory effects of Hedysarum polybotrys polysaccharide (HPS) in a rat model of endotoxin-induced uveitis (EIU).

Methods: EIU was induced in Wistar rats through subcutaneous injection of lipopolysaccharide (LPS, 200 µg) and the rats were then randomly assigned to EIU group (n=5) and the HPS intervention group (n=5). HPS (400 mg/kg, intraperitoneally) or its carrier was administered 24h and 1h prior to EIU induction. Eyes were examined and enucleated 24h post-induction, and total RNA was extracted from the iris-ciliary body. Gene expression microarrays were used to identify differentially expressed genes (DEGs), followed by bioinformatics analyses, including gene ontology (GO) and pathway analysis. Key findings were not experimentally validated at the mRNA or protein level.

Results: A total of 322 DEGs were identified, comprising 254 mRNA and 68 lncRNA genes. GO analysis revealed significant functional categories, including response to LPS. Pathway analysis identified key signaling pathways involved in uveitis, such as cytokine-cytokine receptor interactions. Notably, 16 mRNA and 7 lncRNA DEGs emerged as central nodes in the gene correlation network.

Conclusion: HPS exerts its anti-inflammatory effects through coordinated signaling pathways, offering insights into potential therapeutic targets for managing uveitis.

Aim: To compare the intravitreal brolucizumab and bevacizumab injections for chronic central serous chorioretinopathy (cCSC).

Methods: Patients with cCSC were classified into bevacizumab and brolucizumab group. The proportion of complete resolution of subretinal fluid (SRF), best-corrected visual acuity (BCVA), central macular thickness (CMT), and subfoveal choroidal thickness (SFCT) were compared between the two groups.

Results: A total of 40 eyes from 40 patients with aged 34-59y were enrolled in the study. Twenty eyes in bevacizumab group (17 males) and 20 eyes (18 males) in brolucizumab group. Comparing the proportion of complete resolution of SRF, the brolucizumab group was statistically significantly higher than the bevacizumab group (P<0.05). In 1mo, CMT was significantly reduced in the brolucizumab group compared to the bevacizumab group (265±69 vs 319±70 µm; P=0.021). However, there was no significant difference in CMT between the two groups at 2 and 3mo (P>0.05).

Conclusion: Brolucizumab is anatomically and functionally superior to bevacizumab in the treatment of patients with cCSC.

Aim: To assess risk factors for epiretinal membranes (ERM) and examine their interactions in a nationally representative U.S. dataset.

Methods: Data from the 2005-2008 National Health and Nutrition Examination Survey (NHANES) were analyzed, a nationally representative U.S. dataset. ERM was identified via retinal imaging based on the presence of cellophane changes. Key predictors included age group, eye surgery history, and refractive error, with additional demographic and health-related covariates. Weighted univariate and multiple logistic regression models were used to assess associations and interaction effects between eye surgery and refractive error.

Results: Totally 3925 participants were analyzed. Older age, eye surgery, and refractive errors were significantly associated with ERM. Compared to those under 65y, the odds ratio (OR) for ERM was 3.08 for ages 65-75y (P=0.0014) and 4.76 for ages 75+ years (P=0.0069). Eye surgery increased ERM risk (OR=3.48, P=0.0018). Moderate to high hyperopia and myopia were also associated with ERM (OR=2.65 and 1.80, respectively). A significant interaction between refractive error and eye surgery was observed (P<0.0001). Moderate to high myopia was associated with ERM only in those without eye surgery (OR=1.92, P=0.0443). Eye surgery was most strongly associated with ERM in the emmetropic group (OR=3.60, P=0.0027), followed by the moderate to high myopia group (OR=3.01, P=0.0031).

Conclusion: ERM is significantly associated with aging, eye surgery, and refractive errors. The interaction between eye surgery and refractive error modifies ERM risk and highlights the importance of considering combined effects in clinical risk assessments. These findings may help guide individualized ERM risk assessment that may inform personalized approaches to ERM prevention and management.

Micro/nanoplastics (M/NPs) have become pervasive environmental pollutants, posing significant risks to human health through various exposure routes, including ingestion, inhalation, and direct contact. This review systematically examined the potential impacts of M/NPs on ocular health, focusing on exposure pathways, toxicological mechanisms, and resultant damage to the eye. Ocular exposure to M/NPs can occur via direct contact and oral ingestion, with the latter potentially leading to the penetration of particles through ocular biological barriers into ocular tissues. The review highlighted that M/NPs can induce adverse effects on the ocular surface, elevate intraocular pressure, and cause abnormalities in the vitreous and retina. Mechanistically, oxidative stress and inflammation are central to M/NP-induced ocular damage, with smaller particles often exhibiting greater toxicity. Overall, this review underscored the potential risks of M/NPs to ocular health and emphasized the need for further research to elucidate exposure mechanisms, toxicological pathways, and mitigation strategies.

Aim: To evaluate the therapeutic effects of ranibizumab on optic disc and macular microvascular perfusion in central retinal vein occlusion (CRVO) with macular edema (ME).

Methods: Optical coherence tomography angiology (OCTA) parameters, including optic disc vessel density (VD; including whole-disc VD, intra-disc VD, and peripapillary VD), superficial/deep capillary plexus (SCP/DCP) VD, and central macular thickness (CMT) were analyzed. Additional assessments included best-corrected visual acuity (BCVA) via Early Treatment Diabetic Retinopathy Study (ETDRS) chart and hemorheological profiling. CRVO patients received monthly intravitreal ranibizumab injections for three consecutive months. Pre- and post-treatment parameters were statistically compared.

Results: The study comprised 60 CRVO-ME patients (28 males; 32 females), aged 50-78y (mean 63.3±7.6y) and 60 age-/sex-matched healthy controls. As compared with participants exhibiting normal funduscopic findings, CRVO patients demonstrated significantly elevated levels of low-shear-rate whole blood viscosity (LSR-WBV), high-shear-rate whole blood viscosity (HSR-WBV), and aggregation index (AI, all P<0.05). In CRVO-affected eyes, vertical cup-to-disc (C/D) ratio and optic cup volume were significantly smaller, whereas retinal nerve fiber layer (RNFL) thickness was significantly greater, compared to both unaffected contralateral eyes and normal control eyes (all P<0.05). Following treatment, VD of the entire optic disc (P<0.05), intra-disc VD (P<0.05), and peripapillary VD (P<0.05) all increased significantly relative to baseline. CMT decreased significantly (P<0.05), whereas macular SCP-VD and macular DCP-VD showed non-significant slight reductions (P>0.05). At baseline, BCVA of CRVO eyes correlated with whole-disc VD (r=-0.276, P=0.033), intra-disc VD (r=-0.342, P=0.009), and peripapillary VD (r=-0.335, P=0.007), with intra-disc VD demonstrating the strongest association. Besides, BCVA improvement, after the treatment, correlated positively with whole-disc VD (r=0.342, P=0.008) and intra-disc VD (r=0.396, P=0.002).

Conclusion: Optic disc blood perfusion is more closely associated with visual acuity than macular perfusion, suggesting intra-disc VD may serve as a potential biomarker for monitoring visual acuity changes in CRVO. Multiple ranibizumab injections significantly improve optic disc perfusion but may have exerted detrimental effects on the macula. CRVO patients shows higher hemorheological parameters than those with normal fundi. Reduced vertical C/D ratio and optic cup volume may be linked to CRVO incidence, potentially acting as susceptibility factors.

Rhegmatogenous retinal detachment (RRD) is a serious ocular condition marked by the separation of the neuroretina from the retinal pigment epithelium (RPE). The pathogenesis of RRD involves intricate molecular and cellular mechanisms, including inflammation, cell migration, and the activation of proliferative signaling pathways. One of the most challenging complications of RRD is proliferative vitreoretinopathy (PVR), which refers to the proliferation and contraction of fibrocellular membranes on the retinal surface and in the vitreous cavity. PVR is a major cause of surgical failure in RRD, as it can lead to recurrent retinal detachment and severe vision loss. However, the pathogenesis of PVR is not yet fully understood, and the treatment options are quite limited. Recent advances in analytical techniques have offered valuable insights into the molecular alterations present in the subretinal fluid (SRF) of patients with RRD. This review seeks to consolidate the current knowledge regarding the SRF profile in RRD and PVR, emphasizing potential biomarkers and therapeutic targets.

Aim: To summarize publication trends in the field of strabismus over the past 30y and predict future research hotspots.

Methods: A total of 2915 English-language articles and reviews on strabismus, published between 1993 and 2022, were retrieved from the Web of Science Core Collection. Bibliometric analyses were performed using VOSviewer and CiteSpace software to explore publication trends, as well as the contributions and collaborative networks of countries/regions, authors, institutions, and journals.

Results: The annual number of publications on strabismus showed a consistent upward trend. The United States (USA) maintained a leading position in this research field while Republic of Korea and China emerged as rapidly advancing contributors over the last decade. The University of California, Los Angeles ranked as the most productive institution, and Jonathan M. Holmes from USA was the most productive author. Journal of AAPOS was the leading journal with the most strabismus publications, whereas the two most highly cited articles were both published in Ophthalmology. Co-occurrence analysis identified pivotal keywords and burst terms, including intermittent exotropia (IXT), acute acquired comitant esotropia (AACE), functional magnetic resonance imaging (fMRI), and surgical treatment, which were confirmed as predominant and frontier topics.

Conclusion: This study provides a comprehensive bibliometric analysis of strabismus research, revealing the evolution of research hotspots over the past 30y and outlining several cutting-edge directions for future investigation.

Aim: To evaluate the efficacy of the total computer vision syndrome questionnaire (CVS-Q) score as a predictive tool for identifying individuals with symptomatic binocular vision anomalies and refractive errors.

Methods: A total of 141 healthy computer users underwent comprehensive clinical visual function assessments, including evaluations of refractive errors, accommodation (amplitude of accommodation, positive relative accommodation, negative relative accommodation, accommodative accuracy, and accommodative facility), and vergence (phoria, positive and negative fusional vergence, near point of convergence, and vergence facility). Total CVS-Q scores were recorded to explore potential associations between symptom scores and the aforementioned clinical visual function parameters.

Results: The cohort included 54 males (38.3%) with a mean age of 23.9±0.58y and 87 age-matched females (61.7%) with a mean age of 23.9±0.53y. The multiple regression model was statistically significant [R²=0.60, F=13.28, degrees of freedom (DF=17 122, P<0.001]. This indicates that 60% of the variance in total CVS-Q scores (reflecting reported symptoms) could be explained by four clinical measurements: amplitude of accommodation, positive relative accommodation, exophoria at distance and near, and positive fusional vergence at near.

Conclusion: The total CVS-Q score is a valid and reliable tool for predicting the presence of various non-strabismic binocular vision anomalies and refractive errors in symptomatic computer users.