scholarly journals In Vivo Anti-Inflammation Potential of Aster koraiensis Extract for Dry Eye Syndrome by the Protection of Ocular Surface

Nutrients ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3245
Author(s):  
Sung-Chul Hong ◽  
Jung-Heun Ha ◽  
Jennifer K. Lee ◽  
Sang Hoon Jung ◽  
Jin-Chul Kim
Keyword(s):  
Animal Model ◽  
Er Stress ◽  
Dry Eye ◽  
Lacrimal Gland ◽  
Ocular Surface ◽  
Inflammatory Responses ◽  
Dry Eye Syndrome ◽  
Inhibitory Effects ◽  
Food Material

Dry eye syndrome (DES) is a corneal disease often characterized by an irritating, itching feeling in the eyes and light sensitivity. Inflammation and endoplasmic reticulum (ER) stress may play a crucial role in the pathogenesis of DES, although the underlying mechanism remains elusive. Aster koraiensis has been used traditionally as an edible herb in Korea. It has been reported to have wound-healing and inhibitory effects against insulin resistance and inflammation. Here, we examined the inhibitory effects of inflammation and ER stress by A. koraiensis extract (AKE) in animal model and human retinal pigmented epithelial (ARPE-19) cells. Oral administration of AKE mitigated DE symptoms, including reduced corneal epithelial thickness, increased the gap between lacrimal gland tissues in experimental animals and decreased tear production. It also inhibited inflammatory responses in the corneal epithelium and lacrimal gland. Consequently, the activation of NF-κB was attenuated by the suppression of cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2). Moreover, AKE treatment ameliorated TNF-α-inducible ocular inflammation and thapsigargin (Tg)-inducible ER stress in animal model and human retinal pigmented epithelial (ARPE-19) cells. These results prove that AKE prevents detrimental functional and histological remodeling on the ocular surface and in the lacrimal gland through inhibition of inflammation and ER stress, suggesting its potential as functional food material for improvement of DES.

Neutralization of Ocular Surface TNF-α Reduces Ocular Surface and Lacrimal Gland Inflammation Induced by In Vivo Dry Eye

2013 ◽  
Vol 54 (12) ◽  
pp. 7557 ◽  
Author(s):  
Yong Woo Ji ◽  
Yu Jeong Byun ◽  
Wungrak Choi ◽  
Eunae Jeong ◽  
Jin Sun Kim ◽  
...  
Keyword(s):  
Dry Eye ◽  
Lacrimal Gland ◽  
Ocular Surface ◽  
Tnf Α

scholarly journals An Engineered Contact Lens for Passive and Sustained Release of Lifitegrast, an Anti-Dry Eye Syndrome Drug

2021 ◽  
Author(s):  
Changhua Mu ◽  
Victoria Lee ◽  
Yiran Liu ◽  
Ying Han ◽  
gerard marriott
Keyword(s):  
Drug Utilization ◽  
Dry Eye ◽  
Contact Lens ◽  
Ocular Surface ◽  
Contact Lenses ◽  
Inflammatory Responses ◽  
Bond Cleavage ◽  
Tear Film ◽  
Dry Eye Syndrome ◽  
Zero Order Reaction

Lifitegrast is an FDA-approved drug that inhibits T-cell mediated inflammation associated with dry eye syndrome (DES). Lifitegrast is a potent inhibitor of the interaction between LFA-1 on T-cells and ICAM-1 on endothelial cells at the ocular surface. While effective in treating DES, 5% (81.2 mM) lifitegrast has low drug utilization and elicits off-target effects. Here we engineer contact lenses to release therapeutically relevant doses of lifitegrast to every tear film for up to 10-hours. Lifitegrast is coupled to the polymer of the soft hydrogel lens via a photolabile (caged) crosslinker. Exposures of the lens to the 400-430 nm wavelengths of indoor daylight excite the caged crosslinker molecules and trigger a bond-cleavage reaction that releases authentic lifitegrast passively to the tear film. The photoproduct of the reaction remains chemically linked to the polymer of the single-use lens. Our studies show that passive exposures of the lens to indoor light would generate an average of 990 nM lifitegrast to every tear film in a zero-order reaction for up to 10-hours. This concentration exceeds the Kd for the interaction between ICAM-1 and LFA-1 by ~330-fold and would sustain inhibition of inflammatory responses at the ocular surface. The amount of lifitegrast released from the lens increases during exposures to outdoor sunlight. Over a 10-hour exposure to indoor light, a single lens would release 0.44% of the lifitegrast present in two drops of commercial 5% lifitegrast. Compared to tear-drop approaches, our engineered lenses would sustain the passive delivery of therapeutically relevant doses of lifitegrast over a longer period, and exhibit improved drug utilization at a lower cost. Our technology could easily be integrated into daily-use contact lenses in order to prevent inflammation at the ocular surface, dry-eye and contact lens-mediated discomfort.

scholarly journals The Protective Effect of Polygonum cuspidatum (PCE) Aqueous Extract in a Dry Eye Model

Nutrients ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1550 ◽  
Author(s):  
Bongkyun Park ◽  
Ik Lee ◽  
Soo-Wang Hyun ◽  
Kyuhyung Jo ◽  
Tae Lee ◽  
...  
Keyword(s):  
Inflammatory Cytokines ◽  
Aqueous Extract ◽  
Dry Eye ◽  
Lacrimal Gland ◽  
Ocular Surface ◽  
Corneal Epithelial Cell ◽  
Heme Oxygenase 1 ◽  
Polygonum Cuspidatum

Dry eyes are caused by highly increased osmolarity of tear film, inflammation, and apoptosis of the ocular surface. In this study, we investigated the effect of Polygonum cuspidatum (PCE) aqueous extract in in vivo and in vitro dry eye models. Dry eye was induced by excision of the lacrimal gland and hyperosmotic media. In vivo, oral administration of PCE in exorbital lacrimal gland-excised rats recovered tear volume and Mucin4 (MUC4) expression by inhibiting corneal irregularity and expression of inflammatory cytokines. In vitro, hyperosmotic media induced human corneal epithelial cell (HCEC) cytotoxicity though increased inflammation, apoptosis, and oxidative stress. PCE treatment significantly inhibited expression of cyclooxygenase-2 and inflammatory cytokines (interleukin-6 and tumor necrosis factor-α), and activation of NF-κB p65 in hyperosmolar stress-induced HCECs. Hyperosmolarity-induced increase in Bcl-2-associated X protein (BAX) expression and activation of cleaved poly (ADP-ribose) polymerase and caspase 3 were attenuated in a concentration-dependent manner by PCE. PCE treatment restored anti-oxidative proteins such as heme oxygenase-1 (HO-1), superoxide dismutase-1 (SOD-1), and glutathione peroxidase (GPx) in hyperosmolar stress-induced HCECs. These data demonstrate that PCE prevents adverse changes in the ocular surface and tear fluid through inhibition of hyperosmolar stress-induced inflammation, apoptosis, and oxidation, suggesting that PCE may have the potential to preserve eye health.

Dry Eye Syndrome-Related Quality of Life in Glaucoma Patients

2009 ◽  
Vol 19 (4) ◽  
pp. 572-579 ◽  
Author(s):  
Gemma Caterina Maria Rossi ◽  
Carmine Tinelli ◽  
Gian Maria Pasinetti ◽  
Giovanni Milano ◽  
Paolo Emilio Bianchi
Keyword(s):  
Quality Of Life ◽  
Dry Eye ◽  
Ocular Surface ◽  
Cross Sectional Study ◽  
Dry Eye Syndrome ◽  
Control Group ◽  
Ocular Surface Disease Index ◽  
Symptom Scale ◽  
Cross Sectional

Purpose To verify the presence of dry eye syndrome (DES) in treated patients with glaucoma and to analyze DES's impact on the patients' quality of life (QOL) versus the control group. Methods In this observational cross-sectional study, 61 patients were enrolled at a clinical practice. Patients were divided into three groups by number of glaucoma drops instilled per day (G1=1 drop/day, G2=2 drops/day, G3=3 drops/day). A control group of 20 subjects was also selected (G0). All subjects were submitted to a complete ocular examination (including tear function and ocular surface status) and completed the 25-item National Eye Institute Visual Function Questionnaire (NEI-VFQ), Glaucoma Symptom Scale (GSS) questionnaire, and Ocular Surface Disease Index (OSDI). DES was defined as presence of punctate keratitis and decreased break-up time. Statistical analysis was performed applying the Kruskal-Wallis analysis of variance and Mann-Whitney U tests (to compare median values between groups) as well as the χ2 and Fisher test (to verify significant differences). Results A total of 40% of G3 and 39% of G2 patients presented DES versus 11% of G1 and 5% of G0 (p=0.01). QOL was significantly influenced and altered (NEI-VFQ 25 total mean and GSS total mean and symptoms average: p=0.0085, p=0.006, and p=0.03, respectively). OSDI pointed out differences by group: 26% of G2 and 15% of G3 presented moderate OSDI and 15% of G3 and 8.7% of G2 severe OSDI (p>0.05). Conclusions Patients with topically treated glaucoma present DES more often than a similar control group (p=0.01). The presence of DES negatively influences the patient's QOL. The patients with glaucoma's ocular surface status should be evaluated regularly to ensure the timely detection and treatment of pathologic signs on the ocular surface.

scholarly journals Changes the Ocular Surface after Corneal Refractive Surgery. Review

2020 ◽  
Vol 17 (3) ◽  
pp. 344-350
Author(s):  
S. V. Trufanov ◽  
E. V. Sukhanova ◽  
A. A. Tyurina
Keyword(s):  
Dry Eye ◽  
Ocular Surface ◽  
Refractive Surgery ◽  
High Efficiency ◽  
High Specificity ◽  
Functional Results ◽  
Dry Eye Syndrome ◽  
Specificity And Sensitivity ◽  
Surgery Research ◽  
Corneal Refractive Surgery

Modern corneal refractive surgery provides high efficiency, safety, predictability and stability of the different ametropia kinds correction’s clinically-functional results. However, in overwhelming percentage of cases, having spent some time after surgery patients complain about discomfort, eyes dryness, burning, feel gritty, redness, blurred and vision instability. Complaints mentioned above are caused by the appearance of transitory dry eye syndrome. Main etiology and pathogenesis factors of this disease are presented in this review. The results of dry eye syndrome classical diagnosis methods have been analyzed, as well as modern techniques, characterized by high specificity and sensitivity, which allow to increase the dry eye’s diagnostics accuracy. The study of the dry syndrome after corneal refractive surgery is devoted to a huge number of works of domestic and foreign authors. However, at present time there is no unique algorithm for assessing the damage of the ocular surface before and after corneal refractive surgery, which would include a set of high-precision and specific techniques for quickly and reliably evaluate the severity of dry eye syndrome, allowing to develop preventive measures and pathogenetically oriented treatment and, thereby, accelerate rehabilitation of patients after surgery. Research continuation is needed in this direction.

scholarly journals Micro-instillation of fluorescein with an inoculation loop for ocular surface staining in dry eye syndrome

2017 ◽  
Vol 96 (2) ◽  
pp. e140-e146 ◽  
Author(s):  
Emilie Courrier ◽  
Didier Renault ◽  
Mathilde Kaspi ◽  
Agathe Marcon ◽  
Victor Lambert ◽  
...  
Keyword(s):  
Dry Eye ◽  
Ocular Surface ◽  
Dry Eye Syndrome ◽  
Surface Staining

scholarly journals Topical Application of Liriope platyphylla Extract Attenuates Dry Eye Syndrome Induced by Particulate Matter

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Su Jeong Song ◽  
Soo-Wang Hyun ◽  
Tae Gu Lee ◽  
Bongkyun Park ◽  
Kyuhyung Jo ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Dry Eye ◽  
Topical Administration ◽  
Air Pollutant ◽  
Dry Eye Syndrome ◽  
Protective Effects ◽  
Corneal Epithelial ◽  
Liriope Platyphylla ◽  
Ocular System

Particulate matter (PM) is a type of air pollutant that poses a risk to human health. In the ocular system, PM causes or aggravates dry eye syndrome (DES) by damaging the corneal and conjunctival epithelia. Liriope platyphylla has been used traditionally as an expectorant, antitussive agent, and tonic in Korea. However, the effects of Liriope platyphylla extract (LPE) on PM-induced ocular damage have not been elucidated. In this study, we evaluated the in vivo protective effect of LPE against PM-induced DES in rats. Topical administration of LPE attenuated the PM-induced decrease in tear volume and reduced corneal epithelial irregularity and damage. LPE also protected against PM-induced disruption of the corneal mucin-4 layer and reduction in the conjunctival goblet cell density. These findings suggest that LPE has protective effects against PM-induced DES.

Efficacy of eyedrops containing cross-linked hyaluronic acid and coenzyme Q10 in treating patients with mild to moderate dry eye

2018 ◽  
Vol 28 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Elisa I. Postorino ◽  
Laura Rania ◽  
Emanuela Aragona ◽  
Carmen Mannucci ◽  
Angela Alibrandi ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Hyaluronic Acid ◽  
Dry Eye ◽  
Coenzyme Q10 ◽  
Ocular Surface ◽  
Fundus Examination ◽  
Ocular Surface Disease Index ◽  
Corneal Confocal Microscopy ◽  
Group A

Purpose: Dry eye disease (DED) is a common condition causing substantial burden. A randomized, controlled, single-masked study was performed in 40 patients with mild to moderate DED to evaluate the efficacy and safety of a collyrium based on crosslinked hyaluronic acid (XLHA) with coenzyme Q10 (CoQ10). Methods: Enrolled subjects were divided into 2 groups: group A, treated with XLHA + CoQ10; and group B, treated with hyaluronic acid (HA). Eyedrops were administered 4 times daily for 3 months. The Ocular Surface Disease Index (OSDI) questionnaire, tear break-up time (TBUT), corneal and conjunctival staining, and meibomian gland assessment (MGD) were evaluated; furthermore, corneal aesthesiometry, in vivo corneal confocal microscopy, visual acuity, intraocular pressure (IOP), and fundus examination were performed. Results: At the end of treatment, OSDI score significantly decreased in groups A and B (p<0.01 and p<0.05, respectively); the decrease was significantly higher in group A. Corneal staining decreased in both groups, with lower scores in group A. The MGD was significantly ameliorated in group A patients. No differences were found for corneal aesthesiometry or TBUT. Epithelial cell reflectivity was significantly reduced only in group A. For keratocytes and stromal matrix parameters, there was a significant improvement in group A. No changes were found for visual acuity, IOP, or fundus examination. Conclusions: The XLHA + CoQ10 treatment showed greater effectiveness in DED compared to HA alone, probably due to the longer permanency on ocular surface and the antioxidant activity of CoQ10. Therefore, XLHA + CoQ10 eyedrops could represent a new possibility in dry eye treatment.

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