Introduction: Several macular complications related to abnormalities of the vitreoretinal interface have been classically attributed to retinitis pigmentosa of which cystoid macular edema is the most common. Other less frequent complications are as follows: epiretinal membranes, vitreomacular traction syndrome and macular holes.
Case Presentation: A 64-year-old woman, with the previous diagnosis of retinitis pigmentosa, was referred to our department with a complaint of central visual loss in her left eye for 12 months. A fundoscopy and optical coherence tomography examination revealed the presence of a macular hole more than 500 microns in diameter. The patient underwent 20-gauge pars plana vitrectomy. Closure of the hole was observed after surgery, but reopening occurred at 2 years postoperatively.
Conclusion: The pathogenesis of macular hole formation in patients with retinitis pigmentosa is unclear. Surgical outcomes may not always be favorable, and the possibility of reopening must be taken into account, even after a long time.
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http://dx.doi.org/10.1186/1752-1947-7-69 | DOI Listing |
Nat Commun
January 2025
Center for Synaptic Neuroscience, Istituto Italiano di Tecnologia, Genova, Italy.
The lack of effective therapies for visual restoration in Retinitis pigmentosa and macular degeneration has led to the development of new strategies, such as optogenetics and retinal prostheses. However, visual restoration is poor due to the massive light-evoked activation of retinal neurons, regardless of the segregation of visual information in ON and OFF channels, which is essential for contrast sensitivity and spatial resolution. Here, we show that Ziapin2, a membrane photoswitch that modulates neuronal capacitance and excitability in a light-dependent manner, is capable of reinstating, in mouse and rat genetic models of photoreceptor degeneration, brisk and sluggish ON, OFF, and ON-OFF responses in retinal ganglion cells evoked by full-field stimuli, with reactivation of their excitatory and inhibitory conductances.
View Article and Find Full Text PDFOphthalmol Retina
January 2025
Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China; NHC Key Laboratory of Myopia and Related Eye Diseases; Key Laboratory of Myopia and Related Eye Diseases, Chinese Academy of Medical Sciences, Shanghai, China.
Cells
January 2025
Department of Pharmacology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44106, USA.
Retinitis pigmentosa (RP) is a hereditary disease characterized by progressive vision loss ultimately leading to blindness. This condition is initiated by mutations in genes expressed in retinal cells, resulting in the degeneration of rod photoreceptors, which is subsequently followed by the loss of cone photoreceptors. Mutations in various genes expressed in the retina are associated with RP.
View Article and Find Full Text PDFInt J Biol Sci
January 2025
Department of Basic & Translational Sciences, School of Dental Medicine, University of Pennsylvania, USA.
Inositol polyphosphate-5-phosphatase E (INPP5E) is a 5-phosphatase critically involved in diverse physiological processes, including embryonic development, neurological function, immune regulation, hemopoietic cell dynamics, and macrophage proliferation, differentiation, and phagocytosis. Mutations in cause Joubert and Meckel-Gruber syndromes in humans; these are characterized by brain malformations, microphthalmia, situs inversus, skeletal abnormalities, and polydactyly. Recent studies have demonstrated the key role of INPP5E in governing intracellular processes like endocytosis, exocytosis, vesicular trafficking, and membrane dynamics.
View Article and Find Full Text PDFOphthalmic Genet
January 2025
Department of Small Animal Clinical Sciences, Michigan State University, East Lansing, Michigan, USA.
Background: The phenotypic variability of inherited conditions can be due to several factors including environmental, epigenetic, and genetic. One of those genetic factors is the presence of modifying loci which alter the phenotypic expression of a primary disease or phenotype-causing variant. Modifiers are known to affect penetrance, dominance, expressivity, and pleiotropy of disease.
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