The Spindle-view, a specialized instrument for observing spindle image, was applied to observe the meiotic spindles of vitro matured porcine oocytes at 36, 42, 44, 48h, and enucleation from porcine, comparing to the previously methods (McGrath-Solter's method and two-step-squeezing method) in the enucleated. The results showed that: (1) there was no noticeable differences at vicinity of spindle images and 1st polar body among in vitro matured porcine oocytes at 40-48 h under the instrument; (2) Spindle-view is suitable for the observation of meiotic spindles of matured oocytes and enucleation from porcine; the modified Spindle-view method for enucleation is significantly better than McGrath-Solter' s method and two-step-squeezing method in the enucleated rates (95.5%, 42.1%, 74.2%, P < 0.0l) of absolutely removing nuclei matter; (3) the spindle images could be used to monitor the oocyte qualities.
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Ophthalmol Sci
November 2024
Department of Ophthalmology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
Purpose: Autologous retinal transplantation has been successfully employed in the treatment of large and myopic macular holes that are refractory to standard surgical treatments. Patients transplanted with a peripheral neurosensory retinal graft have shown unexpected improvements in visual acuity. The study aims to investigate if neural integration of the graft takes place in a porcine model of retinal hole.
View Article and Find Full Text PDFCutan Ocul Toxicol
December 2024
Edward Harkness Institute of Ophthalmology, Vagelos College of Physicians and Surgeons, Columbia University Medical Center, New York, USA.
Invest Ophthalmol Vis Sci
November 2024
Department of Ophthalmology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
Purpose: To investigate the histopathological changes following subretinal amniotic membrane transplantation in an in vivo porcine model of retinal holes.
Methods: Left eyes of 12 Danish Landrace pigs were vitrectomized under full anesthesia. A subretinal bleb was created before excising a retinal hole (1154-2934 µm) using a 23-gauge vitrector.
Adv Mater
November 2024
Department of Plastic Surgery, The Second Affiliated Hospital of Zhejiang University College of Medicine, Hangzhou, 310000, China.
Persistent excessive inflammation caused by neutrophil and macrophage dysfunction in the wound bed leads to refractory response during wound healing. However, previous studies using cytokines or drugs often suffer from short half-lives and limited targeting, resulting in unsatisfactory therapeutic effects. Herein, the enucleated mesenchymal stem cell is engineered by aptamer bioorthogonal chemistry to modify the cell membrane and mRNA loading in the cell cytoplasm as a novel delivery vector (Cargocyte) with accurate targeting and sustained cytokine secretion.
View Article and Find Full Text PDFVet Ophthalmol
September 2024
Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA.
An approximately 26-year-old, suspected female, red-tailed hawk (Buteo jamaicensis) was presented with a history of chronic ocular changes of the left eye likely secondary to blunt trauma resulting in blindness and phthisis bulbi. Ophthalmic evaluation of OS revealed a large intraocular mass, 3+ aqueous flare indicating anterior uveitis, and severely decreased intraocular pressure measuring 5 mmHg. Ocular ultrasound revealed an abnormal, spherical shaped and hyperechoic lens, as well as hyperechoic material or a mass lesion in the posterior segment.
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