Retinal Capillary Constriction
Retinal Capillary Constriction - Related Videos
08:25
Transverse Aortic Constriction in Mice
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Cited by 262 •
2010
Transverse aortic constriction (TAC) in the mouse is a commonly used experimental model to study mechanisms underlying cardiac hypertrophy and heart failure development. Here, we describe procedures to constrict the aorta to create a reproducible degree of cardiac hypertrophy in mice.
07:40
Minimally Invasive Transverse Aortic Constriction in Mice
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Cited by 42 •
2017
Minimally invasive transverse aortic constriction (MTAC) conserves the essentials of regular transverse aortic constriction (TAC) while eliminating the use of a ventilator with tracheal intubation. It proves to be a highly desirable method for high-throughput studies on left ventricular overload, particularly in translational studies.
08:50
Capillary Electrophoresis (CE)
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Capillary electrophoresis (CE) is a separation technique that separates molecules in an electric field according to size and charge. CE is performed in a small glass tube called a capillary that is filled with an electrolyte solution. Analytes are separated due to differences in electrophoretic mobility, which varies with charge, solvent viscosity, and size. Traditional electrophoresis in gels is limited in the amount of voltage...
07:31
A Model of Cardiac Remodeling Through Constriction of the Abdominal Aorta in Rats
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Cited by 26 •
2016
A rat model of abdominal aortic constriction that induces cardiac hypertrophy and remodeling is described. An efficient, highly-reproducible, and minimally-invasive method is used to provide a simple yet useful platform for research in myocardial hypertrophy and dysfunction.
14:53
Capillary Electrophoresis Separation of Monoclonal Antibody Isoforms Using a Neutral Capillary
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Cited by 2 •
2017
Here, we present a comprehensive capillary zone electrophoresis protocol for the assessment of intrinsic physicochemical heterogeneity of monoclonal antibodies as a quality attribute.
FAQs
Contractile pericytes surrounding retinal capillaries respond to vascular signals by tightening around the vessel. This action reduces the capillary lumen, the open space available for blood flow, and can limit erythrocyte passage. Because pericytes directly influence capillary diameter, they provide a cellular mechanism for adjusting local retinal perfusion rather than merely changing blood flow in larger vessels.
The immediate effect is reduced space for erythrocytes to pass through the capillary. This limits local blood flow and changes how oxygen delivery reaches nearby retinal tissue. The response therefore links a structural change in the microvessel to a functional adjustment in perfusion, allowing the retina to regulate delivery rather than maintaining identical flow under all conditions.
Retinal autoregulation helps match oxygen delivery to changing tissue demand. Neural activity and metabolism influence how much oxygen the retina requires, while capillary adjustments affect how much oxygenated blood reaches the tissue. Studying this coordination clarifies how vascular behavior supports retinal function and how an imbalance between demand and delivery may contribute to inadequate oxygen availability.
Vascular signals, neural activity, oxygen availability, and metabolic demand are central factors in this process. Together, they provide information about the retina’s current physiological state and help determine whether local blood flow should be adjusted. Their interaction matters because constriction is not an isolated vessel response; it participates in broader coordination between retinal function, oxygen needs, and perfusion.
The process offers a way to examine how retinal microvascular regulation may become dysfunctional in disease. Diabetic retinopathy and glaucoma are among the conditions associated with microvascular dysfunction, while retinal ischemia reflects inadequate oxygen delivery. Investigating capillary constriction in these contexts can help connect altered blood-flow control with the vascular problems affecting retinal tissue.
These studies can reveal how blood-flow control operates at the retinal microvascular level and how vascular behavior is coordinated with oxygen delivery and tissue demand. They also provide context for understanding retinal ischemia and other microvascular disturbances. In biology, this makes the process useful for linking cellular contractility, local perfusion, neural activity, and disease-related vascular dysfunction.