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Retinal pigment epithelium (RPE) cells are essential for normal retinal function. Morphological defects in these cells are associated with a number of retinal neurodegenerative diseases. Owing to the cellular resolution and depth-sectioning capabilities, individual RPE cells can be visualized in vivo with adaptive optics-optical coherence tomography (AO-OCT). Rapid, cost-efficient, and objective quantification of the RPE mosaic's structural properties necessitates the development of an automated cell segmentation algorithm. This paper presents a deep learning-based method with partial annotation training for detecting RPE cells in AO-OCT images with accuracy better than human performance. We have made the code, imaging datasets, and the manual expert labels available online.
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http://dx.doi.org/10.1364/BOE.538473 | DOI Listing |
Invest Ophthalmol Vis Sci
September 2025
Department of Ophthalmology, Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, United States.
Purpose: Adeno-associated viruses (AAVs) have become the preferred vector for gene therapy in ophthalmology. However, requirements for specific cell surface receptors limit AAV-mediated retinal cell transduction efficiency. This led to the need to engineer novel AAV vectors for widespread retinal transduction and transgene expression.
View Article and Find Full Text PDFInvest Ophthalmol Vis Sci
September 2025
University of Health Science, Haseki Training and Research Hospital, Department of Ophthalmology, Istanbul, Turkey.
Purpose: The purpose of this study was to assess the reflectivity of the outer retinal layers (ORLs) in patients with central serous chorioretinopathy (CSCR) and to examine the relationship between the dimensions of the subretinal fluid (SRF) and ORL.
Methods: This retrospective, cross-sectional study included 33 eyes of 33 patients with CSCR and 33 age- and gender-matched controls. Unnormalized and relative reflectivities for the retinal pigment epithelium (RPE), the external limiting membrane (ELM), and the ellipsoid zone (EZ), as well as SRF height, base width, and area, were measured on optical coherence tomography images.
Acta Biomater
September 2025
Faculty of medicine and health technology, Tampere University, Arvo Ylpön katu 34, 33520 Tampere, Finland. Electronic address:
In the eye, the retinal pigment epithelium (RPE) maintains the functionality and welfare of retinal photoreceptors and forms a tight, interlocked structure with photoreceptor outer segments (POSs). The RPE-retina interaction is difficult to recapitulate in vitro, limiting the studies addressing the retinal maintenance functions of the RPE. To overcome this challenge, we constructed a retina-mimicking structure using a soft polyacrylamide hydrogel coated with Matrigel.
View Article and Find Full Text PDFPLoS One
September 2025
Experimental Physics, Saarland University, Saarbrücken, Germany.
Cellular adhesion and contractility are essential for cell movement. In this study, we investigated the effects of actin stabilization on adhesion properties, contractility, and cell migration. For this, we used the recently synthesized actin stabilizer miuraenamide A (MiuA), which has been discussed as a more reliable alternative to the otherwise commonly used actin stabilizer jasplakinolide.
View Article and Find Full Text PDFCurr Pharm Des
August 2025
King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.
Introduction: Ovarian cancer (OC) is a malignancy of the female reproductive system for which cisplatin chemotherapy is one of the first-line treatments. Despite the initial response to chemotherapy, such patients eventually develop resistance, which poses a major obstacle to treatment, along with potential side effects. Phytochemicals function as chemosensitizers, offering novel therapies in OC patients by targeting drug resistance, and are perceived to be less toxic.
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