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Autoregulation of Blood Flow

Autoregulation of Blood Flow

Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....

Blood Flow

Blood Flow

Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.

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Related Experiment Video

Updated: Oct 12, 2025

In Vitro Model of Physiological and Pathological Blood Flow with Application to Investigations of Vascular Cell Remodeling

In Vitro Model of Physiological and Pathological Blood Flow with Application to Investigations of Vascular Cell Remodeling

Published on: November 3, 2015

Physiologic flow-conditioning limits vascular dysfunction in engineered human capillaries.

Kristina Haase¹, Filippo Piatti², Minerva Marcano¹

¹Dept. of Mechanical Engineering, MIT, Cambridge, MA, USA.

|November 19, 2021

Summary

This summary is machine-generated.

Microfluidic models reveal that fluid flow enhances new blood vessel formation and maintains vessel stability. This flow-conditioning improves endothelial barrier function and reduces detrimental vessel regression in vitro.

Keywords:

Computational fluid dynamics Flow-conditioning Hemodynamics In vitro vessels Interstitial flow Perfusion Shear flow Vascular remodeling

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Last Updated: Oct 12, 2025

In Vitro Model of Physiological and Pathological Blood Flow with Application to Investigations of Vascular Cell Remodeling

In Vitro Model of Physiological and Pathological Blood Flow with Application to Investigations of Vascular Cell Remodeling

Published on: November 3, 2015

Micropatterning and Assembly of 3D Microvessels

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Published on: September 9, 2016

Pneumococcus Infection of Primary Human Endothelial Cells in Constant Flow

Pneumococcus Infection of Primary Human Endothelial Cells in Constant Flow

Published on: October 31, 2019

Area of Science:

Cardiovascular Research
Microfluidics
Vascular Biology

Background:

Hemodynamics are crucial for vascular health and disease.
Endothelial cells sense mechanical forces from blood flow.
Studying microvessels is challenging, limiting cardiovascular health insights.

Purpose of the Study:

To investigate interstitial flow effects on new blood vessel formation.
To examine flow-conditioning effects on vascular remodeling in static culture.
To couple computational flow dynamics with microvessel remodeling.

Main Methods:

Utilized two microfluidic 3D vascular model systems.
Examined neo-vessel formation under interstitial flow conditions.
Assessed vascular remodeling in response to flow-conditioning versus static culture.

Main Results:

Interstitial flow promoted vessel formation and endothelial tight junction remodeling.
Continuous flow maintained stable vessel diameter and remodeling, unlike static culture.
Flow-conditioned vessels showed enhanced barrier function, altered gene expression, reduced reactive oxygen species, and fewer anti-angiogenic cytokines.

Conclusions:

Microvessels exhibit mechanosensitivity to flow-conditioning, preventing in vitro regression.
Microfluidic models offer insights into hemodynamic forces on microvasculature.
Findings have implications for modeling reperfusion/no-flow conditions in cardiovascular research.