macular degeneration/potasio

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The Origin of Subretinal Fluid in Optic Disc Pit Maculopathy.

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A surgical approach for the drainage of fluid leaking over the pit in optic disc pit maculopathy is described, and a theory of the origin of fluid is discussed. In two cases, complete fluid-air exchange was performed. The air infusion pressure was decreased to 5 mm Hg, and the collected fluid was

Potassium ion channels in retinal ganglion cells (review).

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Retinal ganglion cells (RGCs) consolidate visual processing and constitute the last step prior to the transmission of signals to higher brain centers. RGC death is a major cause of visual impairment in optic neuropathies, including glaucoma, age‑related macular degeneration, diabetic retinopathy,

Element analysis of the early stages of age-related macular degeneration.

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The accumulation of basal laminar deposit (BLD) in the macula is considered to be a precursor of age-related macular degeneration. To learn more about the composition of BLD and the role of zinc in age-related macular degeneration, we investigated the elements in BLD, as well as in surrounding

Pharmacological consequences of oxidative stress in ocular tissues.

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The eye is a unique organ because of its constant exposure to radiation, atmospheric oxygen, environmental chemicals and physical abrasion. That oxidative stress mechanisms in ocular tissues have been hypothesized to play a role in diseases such as glaucoma, cataract, uveitis, retrolental

Acute onset of halos and glare: bilateral corneal epithelial edema with cystic eruptions--atypical presentation of amiodarone keratopathy.

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BACKGROUND Amiodarone (Cordarone; Wyeth, Ayerst, New York) is a potassium channel blocking antiarrythmal medication indicated for recurrent ventricular fibrillation and recurrent hemodynamically unstable ventricular tachycardia. Chemically, it is classified as an iodinated benzofuran derivate

Novel locus for autosomal recessive cone-rod dystrophy CORD8 mapping to chromosome 1q12-Q24.

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OBJECTIVE To map the disease locus of a two-generation, consanguineous Pakistani family with autosomal recessive cone-rod dystrophy (arCRD). All affected individuals had night blindness, deterioration of central vision, photophobia, epiphora in bright light, and problems with color distinction.

AβPP-induced UPR Transcriptomic Signature of Glial Cells to Oxidative Stress as an Adaptive Mechanism to Preserve Cell Function and Survival.

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BACKGROUND Alzheimer's disease (AD) and age-related macular degeneration (AMD) present similarities, particularly with respect to oxidative stress, including production of 4-Hydroxy-2- nonenal (HNE). AMD has been named the AD in the eye. The Müller cells (MC) function as a principal glia of the

The antioxidant effects of riluzole on the APRE-19 celll model injury-induced by t-BHP.

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BACKGROUND Age-related macular degeneration (AMD) causes the dysfunction of the retinal pigment epithelial (RPE) cells. In this study, we examined the effects of riluzole, a sustained activator of the TRAAK potassium channel, on human RPE (ARPE-19) cells in an oxidant-induced cell-injury model and

Compartmental analysis of taurine transport to the outer retina in the bovine eye.

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OBJECTIVE To assess the relative resistance presented individually by Bruch's membrane-choroid (BC) and the retinal pigment epithelium (RPE) to movement of taurine between the choroidal circulation and the outer retina. To quantify the effect of light-evoked changes in subretinal potassium

Electrophysiological responses related to the pigment epithelium and its interaction with the receptor layer.

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The standing potential (SP) of the eye is generated mainly at the apical surface of the pigment epithelium, where tight junctions between adjacent cells create a high resistance membrane. It can be recorded indirectly by means of the electrooculogram (EOG) or directly by recording between electrodes

Protein conformational modulation by photons: a mechanism for laser treatment effects.

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Responsiveness to low-level laser treatment (LLTT) at a wavelength of 450-910 nm has established it as an effective treatment of medical, veterinary and dental chronic pain, chronic inflammation conditions (arthritis and macular degeneration), wound repair, and lymphoedema, yet the mechanisms

Up-regulation of endothelial nitric oxide activity as a central strategy for prevention of ischemic stroke - just say NO to stroke!

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Nitric oxide (NO) produced by the endothelium of cerebral arterioles is an important mediator of endothelium-dependent vasodilation (EDV), and also helps to prevent thrombosis and vascular remodeling. A number of risk factors for ischemic stroke are associated with impaired EDV, and this defect is

Only IL-1β release is inflammasome-dependent upon ultraviolet B irradiation although IL-18 is also secreted.

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DNA damage accumulates in aged postmitotic retinal pigment epithelium (RPE) cells, a phenomenon associated with the development of age-related macular degeneration. In this study, we have experimentally induced DNA damage by ultraviolet B (UVB) irradiation in interleukin-1α (IL-1α)-primed ARPE-19

Adenosine triphosphate-binding cassette transporter genes in ageing and age-related diseases.

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The family of adenosine triphosphate (ATP)-binding cassette (ABC) transporters is the largest gene family known. While some ABC transporters translocate single substances across membranes with high specificity, others transport a wide variety of different lipophilic compounds. They are responsible

Toxic retinopathy after phacoemulsification when the cefuroxime dilution is correct.

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OBJECTIVE To determine the clinical characteristics and outcomes of patients with toxic retinopathy after phacoemulsification and intraocular lens implantation when the correct cefuroxime dilution is administered. METHODS State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun

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