scholarly journals Comprehensive expression patterns of inflammatory cytokines in aqueous humor of patients with neovascular age-related macular degeneration

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tomohito Sato ◽  
Masaru Takeuchi ◽  
Yoko Karasawa ◽  
Kei Takayama ◽  
Toshio Enoki
Keyword(s):  
Macular Degeneration ◽  
Aqueous Humor ◽  
Expression Patterns ◽  
Principal Component ◽  
Age Related Macular Degeneration ◽  
Low Grade ◽  
Mutual Distance ◽  
Specific Expression ◽  
Age Related ◽  
Low Grade Inflammation

AbstractNeovascular age-related macular degeneration (nAMD) is a complex and multi-factorial disease, and low-grade inflammation is associated with pathogenesis of nAMD. Aqueous humor could reflect intraocular immune environments in various eye diseases. The research so far used aqueous humor samples and revealed that inflammation is involved in pathophysiology of nAMD, although immunological roles of cytokines were evaluated inadequately with aspect to individual effects. Here we used 27 kinds of cytokines covering general immunologic reactions, examined specific expression patterns of cytokines, and assessed relationships between inflammation and pathophysiology of nAMD by multivariate analyses. In nAMD eyes, principal component analysis showed that IL-7, MCP-1, MIP-1β and VEGF had high principal component loadings of over 0.6 in the first principal component constituting 32.6% of all variability of the data. In exploratory factor analysis, IL-6, MCP-1 and MIP-1β had high factor loadings (FL) of over 0.5 in Factor 1 constituting 32.6% of all variability, while VEGF had FL of over 1.0 in Factor 3 constituting 10.7% of all variability. In hierarchical cluster analysis, MCP-1 and VEGF were located in the cluster of first proximate mutual distance to central retinal thickness. These data could suggest that low-grade inflammation is a principal contributor in nAMD.

scholarly journals Inflammatory Factors of Macular Atrophy in Eyes With Neovascular Age-Related Macular Degeneration Treated With Aflibercept

2021 ◽  
Vol 12 ◽  
Author(s):  
Tomohito Sato ◽  
Toshio Enoki ◽  
Yoko Karasawa ◽  
Hideaki Someya ◽  
Manzo Taguchi ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Expression Patterns ◽  
Principal Component ◽  
Age Related Macular Degeneration ◽  
Inflammatory Factors ◽  
Low Grade ◽  
Characteristic Analysis ◽  
Anti Vegf ◽  
Age Related ◽  
Cytokine Levels

BackgroundNeovascular age-related macular degeneration (nAMD) is a leading cause of blindness in older people. Low-grade inflammation is well-known as one of the pathogenic mechanisms in nAMD. Anti-vascular endothelial growth factor (VEGF) therapy is the first-line treatment for nAMD, although macula atrophy (MA) developed under anti-VEGF therapy causes irreversible visual function impairment and is recognized as a serious disorder. Here, we show specific expression patterns of aqueous humor (AH) cytokines in nAMD eyes developing MA under intravitreal injection of aflibercept (IVA) as an anti-VEGF antibody and present predictive cytokines as biomarkers for the incidence of MA in nAMD eyes under IVA treatment.MethodsTwenty-eight nAMD patients received three consecutive monthly IVA, followed by a pro re nata regimen for 2 years. AH specimens were collected before first IVA (pre-IVA) and before third IVA (post-IVA). AH cytokine levels, visual acuity (VA), and central retinal thickness (CRT) were measured.ResultsTwo-year incidence of MA was 21.4%. In nAMD eyes developing MA [MA (+) group], pre-IVA levels of monocyte chemoattractant protein-1 (MCP-1), macrophage inflammatory protein (MIP)-1β, VEGF and post-IVA level of MCP-1 were higher than those in nAMD eyes without MA [MA (−) group]. In hierarchical cluster analysis, pre-IVA MCP-1 and VEGF were grouped into the same subcluster, as were post-IVA MCP-1 and CRT. In principal component analysis, principal component loading (PCL) of pre-IVA interferon-γ-inducible protein 10 (IP-10) was 0.61, but PCL of post-IVA IP-10 decreased to −0.09. In receiver operating characteristic analysis and Kaplan–Meier curves, pre-IVA MCP-1, MIP-1β, and VEGF and post-IVA interleukin-6, MCP-1, and MIP-1β were detected as predictive factors for MA incidence. In 2-year clinical course, changes of VA in groups with high levels of pre-IVA MIP-1β (over 39.9 pg/ml) and VEGF (over 150.4 pg/ml) were comparable to those in MA (+) group.ConclusionSubstantial loss of IP-10 effects and persistent inflammation contribute to incidence of MA, and screening of AH cytokine levels could be a useful method to predict MA incidence in nAMD eyes under anti-VEGF therapy.

scholarly journals Microbiota and age-related macular degeneration: where are we today?

ABOUTOPEN ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 23-28
Author(s):  
Angelo Maria Minnella ◽  
Francesca Albanesi ◽  
Martina Maceroni
Keyword(s):  
Macular Degeneration ◽  
Clinical Course ◽  
Retinal Disease ◽  
Age Related Macular Degeneration ◽  
Low Grade ◽  
Leaky Gut ◽  
Proinflammatory Mediators ◽  
Age Related ◽  
Simple Sugar ◽  
Low Grade Inflammation

Age-related macular degeneration (AMD) is a complex degenerative multifactorial retinal disease, representing a leading cause of legal blindness among elderly individuals. It is well known that age, family history, smoking, nutrition, and inflammation contribute to the development of AMD. Recent studies support the existence of a gut-retina axis involved in the pathogenesis of several ocular diseases, including AMD. High-fat and high simple sugar diets determine a derangement of the gut microbiota, with an increase of gut permeability and systemic low-grade inflammation. Leaky gut is correlated with higher levels of circulating microbial-associated pattern molecules, which trigger the systemic release of potent proinflammatory mediators and stimulate the specific immune cells of the retina, contributing to retinal damage. All these findings suggest that microbiota is closely related to AMD and that it may be targeted in order to influence AMD pathogenesis and/or its clinical course.

scholarly journals The Role of Diet, Micronutrients and the Gut Microbiota in Age-Related Macular Degeneration: New Perspectives from the Gut-Retina Axis

2018 ◽  
Author(s):  
Emanuele Rinninella ◽  
Maria Cristina Mele ◽  
Nicolò Merendino ◽  
Marco Cintoni ◽  
Gaia Anselmi ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Macular Degeneration ◽  
Potential Role ◽  
Dietary Habits ◽  
Age Related Macular Degeneration ◽  
Low Grade ◽  
Age Related ◽  
The Impact ◽  
Low Grade Inflammation

Age-related macular degeneration (AMD) is a complex multifactorial disease and the primary cause of legal and irreversible blindness among individuals aged >=65 years in developed countries. Globally, it affects 30-50 million individuals, with an estimated increase of approximately 200 million by 2020 and approximately 300 million by 2040. Currently, the neovascular form may be able to be treated with the use of anti-VEGF drugs, while no effective treatments are available for the dry form. Many observational studies, such as AREDS-1 and AREDS 2, have shown a potential role of micronutrient supplementation in lowering the risk of progression of the early stages of AMD. Recently, low-grade inflammation, sustained by dysbiosis and a leaky gut, has been shown to contribute to the development of AMD. Given the ascertained influence of the gut microbiota in systemic low-grade inflammation and its potential modulation by macro- and micro-nutrients, a potential role of diet in AMD has been proposed. This review discusses the role of the gut microbiota in the development of AMD. Using PubMed, Web of Science and Scopus, we searched for recent scientific evidence discussing the impact of dietary habits (high fat and high glucose or fructose diets), micronutrients (vitamins C, E, and D, zinc, beta-carotene, lutein and zeaxanthin) and omega-3 fatty acids on the modulation of the gut microbiota and their relationship with AMD risk and progression.

scholarly journals The Role of Diet, Micronutrients and the Gut Microbiota in Age-Related Macular Degeneration: New Perspectives from the Gut–Retina Axis

Nutrients ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1677 ◽  
Author(s):  
Emanuele Rinninella ◽  
Maria Mele ◽  
Nicolò Merendino ◽  
Marco Cintoni ◽  
Gaia Anselmi ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Macular Degeneration ◽  
Potential Role ◽  
Dietary Habits ◽  
Age Related Macular Degeneration ◽  
Low Grade ◽  
Age Related ◽  
The Impact ◽  
Low Grade Inflammation

Age-related macular degeneration (AMD) is a complex multifactorial disease and the primary cause of legal and irreversible blindness among individuals aged ≥65 years in developed countries. Globally, it affects 30–50 million individuals, with an estimated increase of approximately 200 million by 2020 and approximately 300 million by 2040. Currently, the neovascular form may be able to be treated with the use of anti-VEGF drugs, while no effective treatments are available for the dry form. Many studies, such as the randomized controlled trials (RCTs) Age-Related Eye Disease Study (AREDS) and AREDS 2, have shown a potential role of micronutrient supplementation in lowering the risk of progression of the early stages of AMD. Recently, low-grade inflammation, sustained by dysbiosis and a leaky gut, has been shown to contribute to the development of AMD. Given the ascertained influence of the gut microbiota in systemic low-grade inflammation and its potential modulation by macro- and micro-nutrients, a potential role of diet in AMD has been proposed. This review discusses the role of the gut microbiota in the development of AMD. Using PubMed, Web of Science and Scopus, we searched for recent scientific evidence discussing the impact of dietary habits (high-fat and high-glucose or -fructose diets), micronutrients (vitamins C, E, and D, zinc, beta-carotene, lutein and zeaxanthin) and omega-3 fatty acids on the modulation of the gut microbiota and their relationship with AMD risk and progression.

scholarly journals Local complement activation in aqueous humor in patients with age-related macular degeneration

2017 ◽  
Vol 89 ◽  
pp. 163 ◽  
Author(s):  
Michael Kirschfink ◽  
Tina Schick ◽  
Marlin Steinhauer ◽  
Alexander Aslanidis ◽  
Lebriz Altay ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Aqueous Humor ◽  
Complement Activation ◽  
Age Related Macular Degeneration ◽  
Age Related

Central retinal thickness fluctuations in patients treated with anti-VEGF for neovascular age related macular degeneration

2021 ◽  
pp. 112067212110378
Author(s):  
Francesco Ciucci ◽  
Giuseppina Ioele ◽  
Antonio Bardocci ◽  
Giorgio Lofoco ◽  
Barbara Antonelli ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Retinal Thickness ◽  
Treatment Algorithm ◽  
Real Life ◽  
Principal Component ◽  
Age Related Macular Degeneration ◽  
Central Retinal Thickness ◽  
First Year ◽  
Anti Vegf ◽  
Age Related

Purpose: This is a retrospective, single-center, non randomized interventional real life study, investigating the correlation between variability of central retinal thickness (CRT) and functional outcomes during 2 years of anti-VEGF therapy in patients treated for neovascular age related macular degeneration (nAMD). Background: CRT fluctuations can depend on various factors such as the correct timing of injections, the therapeutic algorithm, and the number of injections (NI) performed; it is important to understand if CRT fluctuations are responsible for worse visual outcomes and consequently to identify the correct ways to avoid or reduce them. Methods: Forty-one patients were treated for nAMD with aflibercept: 0.5 mg intravitreal aflibercept was administered every 4 weeks during the first 3 months, then bimonthly over the first year, and after the first year adopting a PRN regimen. Standard deviation of CRT (CRT/SD), BCVA, and NI were recorded. Correlation studies were performed by Pearson’s test, Ancova, and Principal Component Analysis. Results: A negative correlation was found between CRT/SD and final BCVA. In patients who lost more than 15 letters, CRT/SD mean was significantly higher in comparison with patients who lost less than 15 letters. Patients with final BCVA >65 letters showed lower CRT/SD values compared to patients with final BCVA ⩽65 letters. Multivariate analysis confirmed that in patients with higher baseline BCVA, improvement of BCVA was correlated to NI, and lower values of CRT fluctuations were observed. Conclusions: CRT fluctuations, even after an appropriate NI given per year, significantly influence BCVA; a proactive treatment algorithm appears crucial when treating patients with nAMD.

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