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Diabetic retinopathy barrier

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https://www.readbyqxmd.com/read/29351207/diabetic-retinopathy-screening-a-systematic-review-on-patients-non-attendance
#1
REVIEW
Rahima Muhammad Kashim, Paul Newton, Omorogieva Ojo
Diabetic Retinopathy is a microvascular complication of diabetes, that can go undetected and unnoticed until irreversible damage and even blindness has occurred. Effective screening for diabetic retinopathy has been proven to reduce the risk of sight loss. The National Health Service (NHS) which provides healthcare for all UK citizens, implemented systematic retinal screening for diabetic retinopathy in England in 2003, with the aim of identifying and treating all patients with sight threatening retinopathy...
January 19, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29323186/combination-of-high-fat-high-fructose-diet-and-low-dose-streptozotocin-to-model-long-term-type-2-diabetes-complications
#2
David André Barrière, Christophe Noll, Geneviève Roussy, Farah Lizotte, Anissa Kessai, Karyn Kirby, Karine Belleville, Nicolas Beaudet, Jean-Michel Longpré, André C Carpentier, Pedro Geraldes, Philippe Sarret
The epidemic of type 2 diabetes mellitus (T2DM) is fueled by added fructose consumption. Here, we thus combined high-fat/high-fructose diet, with multiple low-dose injections of streptozotocin (HF/HF/Stz) to emulate the long-term complications of T2DM. HF/HF/Stz rats, monitored over 56 weeks, exhibited metabolic dysfunctions associated with the different stages of the T2DM disease progression in humans: an early prediabetic phase characterized by an hyperinsulinemic period with modest dysglycemia, followed by a late stage of T2DM with frank hyperglycemia, normalization of insulinemia, marked dyslipidemia, hepatic fibrosis and pancreatic β-cell failure...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29289839/protective-effects-of-the-chinese-herbal-medicine-prescription-zhujing-pill-on-retina-of-streptozotocin-induced-diabetic-rats
#3
Xiaoqin Lei, Jianyu He, Cuicui Ren, Yunyun Zhou, Xi Chen, Jianwei Dou
OBJECTIVE: In this study, we investigate the protective effects of the Chinese herbal medicine prescription Zhujing pill (ZJP) on the development of diabetic retinopathy (DR) and explore the potential mechanisms. MATERIALS AND METHODS: Zhujing pill extract (ZJPE) was prepared, and the main components were identified by high-performance liquid chromatography (HPLC). Several serum and tissue (retina) parameters were measured, such as levels of superoxide dismutase (SOD), malondialdehyde (MDA), glutathione peroxidase (GSH-Px), intercellular adhesion molecule 1 (ICAM-1), vascular endothelial growth factor (VEGF), interleukin-1β (IL-1β), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), advanced glycation end products (AGEs), and high sensitivity C-reactive protein (hsCRP)...
December 28, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29285756/expression-distribution-and-function-of-kinin-b1-receptor-in-the-rat-diabetic-retina
#4
Soumaya Hachana, Menakshi Bhat, Jacques Sénécal, Frédéric Huppé-Gourgues, Réjean Couture, Elvire Vaucher
BACKGROUND AND PURPOSE: Kinin B1 receptor (B1R) contributes to vascular inflammation and blood-retinal barrier breakdown in diabetic retinopathy (DR). This study aims at investigating further the changes of expression, the cellular localization and the vascular inflammatory effect of B1R in the retina of streptozotocin diabetic rats. EXPERIMENTAL APPROACH: The distribution of B1R on retinal cell types was investigated by immunocytochemistry. Impact of intravitreal B1R agonist R-838 and eye-drops application of the B1R antagonist R-954 was measured on retinal leukocytes adhesion, gene expression of the kinin and VEGF systems, B1R immunodetection, microgliosis and capillary leakage...
December 29, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29247551/occipital-blood-brain-barrier-permeability-is-an-independent-predictor-of-visual-outcome-in-type-2-diabetics-irrespective-of-the-retinal-barrier-a-longitudinal-study
#5
Sulaiman I Abuhaiba, Miguel Cordeiro, Andre Amorim, Ângela Cruz, Bruno Quendera, Carlos Ferreira, Luisa Ribeiro, Rui Bernardes, Miguel Castelo-Branco
Blood brain barrier permeability in type 2 diabetic patients has been previously shown to be altered in certain brain regions such as the basal ganglia and the hippocampus. Because of the histological and functional similarities between the blood-brain-barrier (BBB) and the blood-retinal-barrier (BRB) we aimed to investigate how the permeability of both barriers predicts visual outcome. We included two control groups (Acute unilateral stroke patients n=9, and type 2 diabetics without BRB leakage n=10) and a case study group of type 2 diabetics with established BRB leakage (n=17)...
December 16, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29211719/inhibition-of-soluble-epoxide-hydrolase-prevents-diabetic-retinopathy
#6
Jiong Hu, Sarah Dziumbla, Jihong Lin, Sofia-Iris Bibli, Sven Zukunft, Julian de Mos, Khader Awwad, Timo Frömel, Andreas Jungmann, Kavi Devraj, Zhixing Cheng, Liya Wang, Sascha Fauser, Charles G Eberhart, Akrit Sodhi, Bruce D Hammock, Stefan Liebner, Oliver J Müller, Clemens Glaubitz, Hans-Peter Hammes, Rüdiger Popp, Ingrid Fleming
Diabetic retinopathy is an important cause of blindness in adults, and is characterized by progressive loss of vascular cells and slow dissolution of inter-vascular junctions, which result in vascular leakage and retinal oedema. Later stages of the disease are characterized by inflammatory cell infiltration, tissue destruction and neovascularization. Here we identify soluble epoxide hydrolase (sEH) as a key enzyme that initiates pericyte loss and breakdown of endothelial barrier function by generating the diol 19,20-dihydroxydocosapentaenoic acid, derived from docosahexaenoic acid...
December 6, 2017: Nature
https://www.readbyqxmd.com/read/29171223/-recent-advances-on-pericytes-in-microvascular-dysfunction-and-traditional-chinese-medicine-prevention
#7
REVIEW
Lei Liu, Jian-Xun Liu, Hao Guo, Jian-Xun Ren
Pericytesis a kind of widespread vascular mural cells embedded within the vascular basement membrane of blood microvessels, constituting the barrier of capillaries and tissue spaces together with endothelial cells. Pericytes communicate with microvascular endothelial cells through cell connections or paracrine signals, playing an important role in important physiological processes such as blood flow, vascular permeability and vascular formation. Pericytes dysfunction may participate in some microvascular dysfunction, and also mediate pathological repair process, therefore pericytes attracted more and more attention...
August 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29170095/assessing-prevalence-of-and-barriers-to-medication-adherence-in-patients-with-uncontrolled-diabetes-attending-primary-healthcare-clinics-in-qatar
#8
Myriam Jaam, Mohamed Izham Mohamed Ibrahim, Nadir Kheir, Muhammad Abdul Hadi, Mohammad Issam Diab, Ahmed Awaisu
BACKGROUND: Studies conducted in Qatar have reported a high prevalence of diabetic nephropathy, retinopathy, and neuropathy. These complications are often associated with poor medication adherence and uncontrolled diabetes. The objectives of this study were to determine the rate of medication adherence among patients with uncontrolled diabetes, and to compare the characteristics and identified barriers between patients with good and those with poor medication adherence. METHOD: A cross-sectional quantitative study was conducted among patients living in Qatar with uncontrolled diabetes attending primary healthcare clinics from October 2016 to January 2017...
November 20, 2017: Primary Care Diabetes
https://www.readbyqxmd.com/read/29169356/aster-koraiensis-extract-prevents-diabetes-induced-retinal-vascular-dysfunction-in-spontaneously-diabetic-torii-rats
#9
Junghyun Kim, Kyuhyung Jo, Chan-Sik Kim, Jin Sook Kim
BACKGROUND: Aster koraiensis extract (AKE) is a standard dietary herbal supplement. The aim of this study is to investigate the inhibitory effects of AKE on diabetes-induced retinal vascular dysfunction in Spontaneously Diabetic Torii (SDT) rats. METHODS: AKE (50 and 100 mg/kg body weight/day) was administered for 16 weeks. The effects of orally administered AKE on blood glucose levels, retinal vascular leakage, apoptosis, and accumulation of advanced glycation end products (AGEs) in the retina were evaluated...
November 23, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29158262/the-epac-rap1-pathway-prevents-and-reverses-cytokine-induced-retinal-vascular-permeability
#10
Carla J Ramos, Chengmao Lin, Xuwen Liu, David A Antonetti
Increased retinal vascular permeability contributes to macular edema, a leading cause of vision loss in eye pathologies such as diabetic retinopathy, age-related macular degeneration, and central retinal vein occlusions. Pathological changes in vascular permeability are driven by growth factors such as VEGF and by pro-inflammatory cytokines such as TNF-α. Identifying the pro-barrier mechanisms that block vascular permeability and restore the blood-retinal barrier (BRB) may lead to new therapies. The cAMP-dependent guanine nucleotide exchange factor EPAC promotes exchange of GTP in the small GTPase Rap1...
November 20, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29149824/the-role-of-gene-therapy-in-the-treatment-of-retinal-diseases-a-review
#11
Claudio Campa, Carla Enrica Gallenga, Elena Bolletta, Paolo Perri
Background: Gene therapy represents the therapeutic delivery of nucleic acid polymers into a patient's cells with the aim of treating an underlying disease. Over the past 2 decades this new therapy has made substantial progress owing to better understanding of the pathobiologic basis of various diseases coupled with growth of gene transfer biotechnologies. The eye, in particular, represents a suitable target for such therapy due to the immune privilege provided by the blood-ocular barrier, the ability to directly visualize, access and locally treat the cells and the minimal amount of vector needed given the size of this organ...
November 16, 2017: Current Gene Therapy
https://www.readbyqxmd.com/read/29147964/diabetes-care-in-qatar-a-survey-of-pharmacists-activities-attitudes-and-knowledge
#12
Maguy Saffouh El Hajj, Safae E Abu Yousef, Meena Ali Basri
Background Diabetes mellitus is recognized as a major public health issue and is one of the top ten causes of death in Qatar. Objective To describe the activities, and attitudes of Qatar pharmacists toward diabetes, to measure their diabetes knowledge and to assess their perceived barriers for diabetes care. Setting Community and ambulatory pharmacies in Qatar. Method Study objectives were addressed in a cross sectional survey of community and ambulatory pharmacists in Qatar. A phone call explaining the study was made to all community and ambulatory pharmacists in Qatar...
November 17, 2017: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/29145552/association-between-perceived-barriers-to-diabetes-self-management-and-diabetic-retinopathy-in-asian-patients-with-type-2-diabetes
#13
Ryan Eyn Kidd Man, Eva K Fenwick, Alfred Tau Liang Gan, Charumathi Sabanayagam, Preeti Gupta, Amudha Aravindhan, Tien Yin Wong, Gavin Siew Wei Tan, Ecosse L Lamoureux
Importance: A patient’s perceived barriers to diabetes self-management (DSM) may affect his or her risk of diabetic retinopathy (DR); however, few studies have examined this association. Objective: To examine the association between perceived barriers to DSM and the severity spectrum of DR in Asian patients with type 2 diabetes. Design, Setting, and Participants: A cross-sectional clinic-based study, the Singapore Diabetes Management Project, was conducted from December 28, 2010, to March 20, 2013, at the Singapore National Eye Centre, a tertiary eye care institute...
December 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/29137959/moving-from-clinic-to-home-what-the-future-holds-for-ophthalmic-telemedicine
#14
Nancy M Holekamp
PURPOSE: To describe the expanding role of telemedicine in healthcare, the key criteria required for a successful device and program implementation, and the current and future role of home monitoring in ophthalmology. DESIGN: Expert perspective METHODS: Analysis with real-world interpretation of home monitoring technologies including current adoption barriers and expanded future demands based on demographic and market forces. RESULTS: Remote patient monitoring represents a paradigm shift in the way physicians care for patients...
November 11, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29119175/protective-effect-of-selenium-supplementation-following-oxidative-stress-mediated-by-glucose-on-retinal-pigment-epithelium
#15
Raquel González de Vega, Montserrat García, María Luisa Fernández-Sánchez, Héctor González-Iglesias, Alfredo Sanz-Medel
There are many conditions that affect the retina. However, diabetic retinopathy (RD) as a complication of Diabetes Mellitus continues to be the leading cause of blindness in working people globally. Diabetic retinopathy is an ocular complication of diabetes that is caused by the deterioration of the blood vessels that supply the retina, which has the consequence that the vision deteriorates irreversibly. The retina, and specifically the retinal pigment epithelium (RPE) is the only neural tissue that is exposed directly and frequently to light, which favors the oxidation of lipids that become extremely toxic to the cells of the retina...
November 9, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29110609/bmp3-is-required-for-integrity-of-blood-brain-barrier-by-promoting-pericyte-coverage-in-zebrafish-embryos
#16
D Lei, X Jin, L Wen, H Dai, Z Ye, G Wang
BACKGROUND: The compromise of blood brain barrier (BBB) integrity is often associated with human hemorrhage stroke and neurodegeneration diseases, including retina diseases, such as age-related macular degeneration and diabetic retinopathy. Brain pericytes play pivotal roles in regulation and maintenance of BBB integrity. However, the mechanisms underlying brain pericyte development to establish BBB integrity remain unclear. METHODS: zebrafish transgenic lines Tg(flk1:GFP; gata1:dsRed), Tg(flk1:GFP), Tg(fli1:GFP) and Tg(BRE:GFP) were used in this work...
November 5, 2017: Current Molecular Medicine
https://www.readbyqxmd.com/read/29092057/health-system-dynamics-analysis-of-eyecare-services-in-trinidad-and-tobago-and-progress-towards-vision-2020-goals
#17
Tasanee Braithwaite, Blaine Winford, Henry Bailey, Petra Bridgemohan, Debra Bartholomew, Deo Singh, Subash Sharma, Rishi Sharma, Juan Carlos Silva, Alastair Gray, Samuel S Ramsewak, Rupert R A Bourne
Avoidable blindness is an important global public health concern. This study aimed to assess Trinidad and Tobago's progress towards achieving the Pan American Health Organization, 'Strategic Framework for Vision 2020: The Right to Sight-Caribbean Region,' indicators through comprehensive review of the eyecare system, in order to facilitate health system priority setting. We administered structured surveys to six stakeholder groups, including eyecare providers, patients and older adult participants in the National Eye Survey of Trinidad and Tobago...
October 30, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/29066926/awareness-of-diabetic-retinopathy-among-patients-with-type-2-diabetes-mellitus-in-jordan
#18
May M Bakkar, Mera F Haddad, Yazan S Gammoh
BACKGROUND: Increasing the level of awareness of diabetic retinopathy among individuals with type 2 diabetes mellitus is considered an important factor for early diagnosis and management of diabetic retinopathy. The aim of this study was to evaluate awareness of diabetic retinopathy among a sample of type 2 diabetes mellitus patients in Jordan. PATIENTS AND METHODS: The study period was from August to December 2015. The sample was selected randomly from patients with type 2 diabetes mellitus from the general population in three main cities of Jordan (Amman, Irbid, and Zarqa)...
2017: Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy
https://www.readbyqxmd.com/read/29026201/dual-contribution-of-trpv4-antagonism-in-the-regulatory-effect-of-vasoinhibins-on-blood-retinal-barrier-permeability-diabetic-milieu-makes-a-difference
#19
David Arredondo Zamarripa, Ramsés Noguez Imm, Ana María Bautista Cortés, Osvaldo Vázquez Ruíz, Michela Bernardini, Alessandra Fiorio Pla, Dimitra Gkika, Natalia Prevarskaya, Fernando López-Casillas, Wolfgang Liedtke, Carmen Clapp, Stéphanie Thébault
Breakdown of the blood-retinal barrier (BRB), as occurs in diabetic retinopathy and other chronic retinal diseases, results in vasogenic edema and neural tissue damage, causing vision loss. Vasoinhibins are N-terminal fragments of prolactin that prevent BRB breakdown during diabetes. They modulate the expression of some transient receptor potential (TRP) family members, yet their role in regulating the TRP vanilloid subtype 4 (TRPV4) remains unknown. TRPV4 is a calcium-permeable channel involved in barrier permeability, which blockade has been shown to prevent and resolve pulmonary edema...
October 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28993218/novel-therapeutic-targets-in-diabetic-macular-edema-beyond-vegf
#20
Elizabeth A Urias, George A Urias, Finny Monickaraj, Paul McGuire, Arup Das
The leading cause of major vision loss in diabetic persons is diabetic macular edema (DME). The hallmark feature of diabetic retinopathy is the alteration of the blood-retinal barrier (BRB). Inflammation plays a crucial role in DME with involvement of several chemokines and cytokines including vascular endothelial growth factor (VEGF). VEGF is a potent cytokine and vaso-permeability factor that has been targeted in multiple, large clinical trials. Multiple anti-VEGF drugs are widely used in the treatment of diabetic macular edema (DME) as the first line of treatment, and have been shown to be effective in vision improvement and prevention of vision loss...
October 6, 2017: Vision Research
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