Myogenic Vasodilation
Myogenic Vasodilation - Related Videos
13:43
Fabrication of Myogenic Engineered Tissue Constructs
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Cited by 11 •
2009
Here, we demonstrate fabrication of collagen-based, tissue constructs containing skeletal myoblasts. These 3-D engineered constructs may be used to replace or repair tissues in vivo. For our purposes, we have designed these as an atrioventricular electrical conduit for the repair of complete heart block[1].
07:46
Assessing Endothelial Vasodilator Function with the Endo-PAT 2000
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Cited by 165 •
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A noninvasive procedure to assess endothelial function is demonstrated using the Endo-PAT 2000.
10:48
Assessing Myogenic Response and Vasoactivity In Resistance Mesenteric Arteries Using Pressure Myography
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Cited by 24 •
2015
Pressure myography is used to assess vasoactivity of small arteries that develop sustained constriction when pressurized. This manuscript provides a detailed protocol to assess in isolated segments of small mesenteric arteries from rats, vasoactivity and the effect of intraluminal pressure on vascular diameter.
07:51
Preparation of Primary Myogenic Precursor Cell/Myoblast Cultures from Basal Vertebrate Lineages
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Cited by 32 •
2014
In vitro culture systems have proven indispensible to our understanding of vertebrate myogenesis. However, much remains to be learned about nonmammalian skeletal muscle development and growth, particularly in basal taxa. An efficient and robust protocol for isolating the adult stem cells of this tissue, the myogenic precursor cells (MPCs), and maintaining their self-renewal, proliferation, and differentiation in a primary culture setting allows for the identification of conserved and divergent...
08:09
Vasodilation of Isolated Vessels and the Isolation of the Extracellular Matrix of Tight-skin Mice
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Cited by 1 •
2017
We describe the isolation of cardiac extracellular matrix from C57Bl/6J control mice, tight-skin mice, and tight-skin mice treated with the IRF5 inhibitory peptide. We also describe the vasodilation studies on the isolated vessels from C57Bl/6J, tight-skin mice and tight-skin mice treated with the IRF5 inhibitory peptide.
FAQs
The key trigger is a fall in transmural pressure, which reduces vascular smooth-muscle activation. Lower pressure is associated with less membrane depolarization and less calcium entry through voltage-gated channels. Because calcium entry supports contraction, the muscle relaxes, allowing the vessel to widen and helping tissue perfusion adjust to the pressure change.
Voltage-gated calcium channels link the vessel’s electrical state to its mechanical response. With reduced pressure, decreased membrane depolarization limits calcium entry, weakening smooth-muscle contraction. This channel-dependent step explains how a change in vessel-wall loading can produce dilation without requiring an initiating neural command or endothelial signal.
Its initiating signal is mechanical rather than primarily neural or endothelial. The vessel responds directly to reduced pressure through changes in smooth-muscle depolarization, calcium entry, and contraction. This distinction matters because it identifies an intrinsic vascular control system that can operate largely independently of signals from nerves or the endothelium.
The response helps cerebral vessels stabilize blood flow when systemic pressure changes. By adjusting smooth-muscle contraction in relation to pressure, it contributes an intrinsic component to cerebral autoregulation. This mechanism is important in neuroscience because maintaining relatively stable brain blood flow depends not only on neural regulation but also on pressure-sensitive behavior within cerebral vessels.
Researchers can examine the response by relating a fall in transmural pressure to vessel relaxation and widening. The mechanistic sequence provides several linked points for interpretation: reduced membrane depolarization, decreased calcium entry through voltage-gated channels, and reduced smooth-muscle contraction. This approach connects the initiating pressure change with the vascular outcome.
Myogenic vasodilation is especially relevant to neuroscience because cerebral vessels help stabilize blood flow when systemic pressure changes. The mechanism offers a vascular basis for examining cerebral autoregulation, rather than treating blood-flow control as exclusively neural. It therefore connects local smooth-muscle behavior with the broader maintenance of brain perfusion.
Research on hypertension, stroke, and traumatic brain injury can use this mechanism as a context for understanding altered neurovascular function. These conditions are relevant because disruption of the response may impair the ability of cerebral vessels to accommodate pressure changes. Examining the myogenic component can therefore clarify how vascular regulation becomes compromised in brain disease or injury.