Capillary Constriction
Capillary Constriction - Related Videos
08:25
Transverse Aortic Constriction in Mice
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Cited by 275 •
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 47 •
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 29 •
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
Pericytes provide a contractile component around endothelial cells in some capillary beds. When local signals prompt these cells to tighten, the surrounding capillary structure can become more restrictive to blood passage. This response may change local resistance and reduce perfusion, making pericyte behavior important when investigating how microvascular narrowing affects tissue oxygen delivery and exchange.
Narrowing within a capillary bed can reduce the amount of blood reaching nearby tissue. With less effective perfusion, delivery of oxygen may be compromised, especially in settings where microvascular function is already impaired. Studying this relationship helps connect changes at the capillary level with tissue-level consequences such as inadequate oxygenation and possible ischemic injury.
Local signals can cause contractile pericytes to tighten around endothelial cells, altering the caliber and resistance of selected capillary segments. Because the response occurs within particular capillary beds, its effects may be localized rather than uniform throughout the circulation. This signaling behavior is therefore relevant to research on regional differences in perfusion and microvascular dysfunction.
Capillary constriction can modify blood delivery and the exchange environment between the circulation and surrounding tissues. Those changes are relevant when researchers examine edema, because altered microvascular behavior may influence how effectively tissues interact with the blood supply. The process is also considered in wound-healing studies, where adequate local perfusion supports investigation of tissue recovery.
Research can assess how narrowing changes microvascular resistance, effective perfusion, tissue oxygenation, and exchange with surrounding tissue. These outcomes provide different views of the same vascular response: resistance describes the flow-limiting change, while oxygenation and exchange indicate its potential tissue consequences. Together, they help characterize microcirculatory function in health and disease.
These conditions provide important contexts for examining whether microvascular narrowing contributes to impaired tissue blood delivery. Studies of ischemia focus on inadequate perfusion, while diabetes-related vascular injury highlights microvascular dysfunction as a research concern. Investigators can use this framework to evaluate how constrictive responses relate to tissue damage and to explore therapies intended to improve effective microcirculatory flow.