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Articles 1 - 6 of 6
Full-Text Articles in Eye Diseases
Effect Of Glaucoma On Melanopsin Retinal Ganglion Cells In Mice, Abigail Mcmullen
Effect Of Glaucoma On Melanopsin Retinal Ganglion Cells In Mice, Abigail Mcmullen
Williams Honors College, Honors Research Projects
Within the mammalian retina, there are melanopsin-containing ganglion cells. These intrinsically photoreceptive cells help control behavioral aspects of vision as well as to aid in circadian rhythms. In this project, it will be determined whether or not glaucoma has an effect on these cells, and what that effect is, from different points in the disease. Glaucoma is an eye disease that damages the retinal ganglion cells and eventually causes them to die, also it can be linked to irregular circadian rhythm. Many techniques will be used to prepare this project but computer imaging will be the primary method for determining …
Glaucoma Alters The Morphology Of Mouse Melanopsin-Containing Retinal Ganglion Cells, Kristin Keenan
Glaucoma Alters The Morphology Of Mouse Melanopsin-Containing Retinal Ganglion Cells, Kristin Keenan
Williams Honors College, Honors Research Projects
Melanopsin ganglion cells are intrinsically photosensitive ganglion cells in the mammalian retina. These cells mediate aspects of non-image forming vision to help regular circadian rhythm. Glaucoma is an eye disease involving an increase in intraocular pressure that has been linked to irregular circadian rhythm. This project will investigate the impact glaucoma has on these melanopsin ganglion cells at different pathological timepoints. This will be performed by using dissection, immunohistochemistry, and computer imaging methods to visualize, trace, and measure the cells’ morphologies in both control and glaucomatous retinas at different timepoints of disease to analyze if glaucoma has a significant effect …
Melanopsin-Expressing Retinal Ganglion Cells In Control Vs. Glaucomatous Retinas, Edward Hamad
Melanopsin-Expressing Retinal Ganglion Cells In Control Vs. Glaucomatous Retinas, Edward Hamad
Williams Honors College, Honors Research Projects
Glaucoma is a common cause of vision loss worldwide and has a large scope of symptoms, ranging from pupillary reflex defects to sleep disorders. These issues can be explained partially by a recently found subtype of retinal ganglion cells that express melanopsin, denoted melanopsin-expressing retinal ganglion cells or mRGCs for short. These cells function primarily as photoreceptors in the non-image forming pathway, but can receive input from rods and cones. Since mRGCs play a role in the pupillary reflex and regulation of the sleep-wake cycle, I investigated if glaucoma leads to the degeneration of these cells in a mouse model …
Investigating The Morphology Of Iprgcs In Control Vs. Glaucomatous Retinas, Samantha Cook
Investigating The Morphology Of Iprgcs In Control Vs. Glaucomatous Retinas, Samantha Cook
Williams Honors College, Honors Research Projects
Glaucoma is a build-up of pressure in the eye that leads to the gradual loss of sight. The intention of this study was to investigate how glaucoma affects intrinsically photosensitive Retinal Ganglion Cells (ipRGCs). These cells contain melanopsin, a photopigment, that enables the cells to react to light. Four-month-old control and five-month-old glaucoma mice retinas were dissected, stained using primary and secondary antibodies, then traced using ImageJ’s Simple Neurite Tracer. There were no significant differences in soma size, total dendritic length, dendritic field size, and dendritic field diameter between control and glaucoma ipRGCs. However, further research is needed to provide …
Analysis Of Ocular Changes In A Cyp1b1-/- Mouse, Kylie Barto
Analysis Of Ocular Changes In A Cyp1b1-/- Mouse, Kylie Barto
Williams Honors College, Honors Research Projects
The goal of the research is to investigate the structural changes seen in Primary Congenital Glaucoma using a mouse model. Eye sections of a Cyp1b1-/- mouse were compared to eye sections of a healthy normal mouse (wild type, WT). Initial examination of the cornea, iris, and irodocorneal angle showed structural changes in Cyp1b1-/-. These changes were similar to those described in the literature using other animal models. This suggests that a mutation in Cyp1b1-/- in a mouse results in a phenotype similar to that seen in PCG human patients and this model could be used to investigate the pathophysiology of …
Assessing The Expression Of Astrocytic Markers In Retinal Ganglion Cell Projection Of Lcr/Hcr Rats, Isabella K. Bartholomew, Samuel Crish, James Holda, Jordan Renna, Gina Wilson
Assessing The Expression Of Astrocytic Markers In Retinal Ganglion Cell Projection Of Lcr/Hcr Rats, Isabella K. Bartholomew, Samuel Crish, James Holda, Jordan Renna, Gina Wilson
Williams Honors College, Honors Research Projects
Metabolic Syndrome is a human condition that presents with various metabolic issues such as abnormal distribution of body fat, high blood pressure, and a prothrombotic state, among other problems (Alberti,et al, 2005). This syndrome is a risk factor for visual disorders, such as glaucoma, and is often associated with increased levels of neuroinflammation. Currently, the animal model used to replicate this syndrome is The Low Capacity Runner and High Capacity Runner Rat Model. These rats have been bred based on their running capacities for 30+ generations to have drastic metabolic differences. We assessed key areas of the retinal ganglion cell …