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Related Concept Videos

Smooth Muscle Contraction01:25

Smooth Muscle Contraction

Smooth muscle contraction is a complex process vital for various bodily functions, from maintaining blood vessel tension to facilitating the movement of food through the digestive tract. Unlike striated muscles, smooth muscle contraction begins more slowly and lasts longer.
The onset of contraction is triggered by an increase in calcium ions within the sarcoplasm, similar to the process in striated muscle. However, smooth muscles have a relatively smaller reservoir of the sarcoplasmic...
Structure and Organization of Smooth Muscles01:13

Structure and Organization of Smooth Muscles

Smooth muscle tissue is a type of muscle tissue that can be found lining various vital organs in the human body, including the lungs, blood vessels, digestive tract, and respiratory tract. This type of tissue is responsible for regulating the movements of these organs, playing crucial roles in the functioning of various systems, including the vascular, digestive, respiratory, and urinary systems.
Structure of smooth muscle cell
Smooth muscle cells are spindle-shaped with tapering ends and a...
Functions of Smooth Muscles01:23

Functions of Smooth Muscles

Smooth muscles are an important type of muscle tissue that plays a vital role in the involuntary movements of internal organs. For example, they help regulate the movement of food through the gut and the flow of blood through the circulatory system.
Function of visceral smooth muscles
Visceral smooth muscle is found in the walls of all hollow organs, except the heart, and is a key player in the involuntary movements that drive the functioning of these internal organs. This tissue is arranged in...
Fascicle Arrangement in Skeletal Muscles01:25

Fascicle Arrangement in Skeletal Muscles

Fascicles are bundles of muscle fibers in a skeletal muscle. Muscle fascicle arrangement is directly associated with the power and range of motion of various muscles. The configuration of these fascicles can vary, leading to different functional outcomes.
The four primary types of muscle based on fascicle arrangement are:
The Role of Actin and Myosin in Non-muscle Cells01:10

The Role of Actin and Myosin in Non-muscle Cells

Actin and myosin or actomyosin filaments also play a significant role in cells other than those involved in muscle contraction (which occurs within the sarcomere of muscle cells). The mechanism of non-muscle cell contractile bundles was first observed in Dictyostelium and Acanthamoeba. In non-muscle cells, two bundles are commonly found: stress fibers and actomyosin adherence belts. These contractile bundles are smaller and less organized than the ones found in muscle cells. They  are held...
Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...

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Related Experiment Video

Updated: May 28, 2026

Utilizing the Precision-Cut Lung Slice to Study the Contractile Regulation of Airway and Intrapulmonary Arterial Smooth Muscle
08:59

Utilizing the Precision-Cut Lung Slice to Study the Contractile Regulation of Airway and Intrapulmonary Arterial Smooth Muscle

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Vascular smooth muscle contractility depends on cell shape.

Patrick W Alford1, Alexander P Nesmith, Johannes N Seywerd

  • 1Disease Biophysics Group, Harvard Stem Cell Institute, Wyss Institute of Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.

Integrative Biology : Quantitative Biosciences From Nano to Macro
|October 14, 2011
PubMed
Summary
This summary is machine-generated.

Vascular smooth muscle cell shape significantly impacts arterial tissue contraction force. Cellular architecture, not just traditional markers, determines functional contractile output in engineered blood vessels.

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Last Updated: May 28, 2026

Utilizing the Precision-Cut Lung Slice to Study the Contractile Regulation of Airway and Intrapulmonary Arterial Smooth Muscle
08:59

Utilizing the Precision-Cut Lung Slice to Study the Contractile Regulation of Airway and Intrapulmonary Arterial Smooth Muscle

Published on: May 5, 2022

Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro
08:28

Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro

Published on: February 15, 2022

Simplified, High-throughput Analysis of Single-cell Contractility using Micropatterned Elastomers
14:33

Simplified, High-throughput Analysis of Single-cell Contractility using Micropatterned Elastomers

Published on: April 8, 2022

Area of Science:

  • Biomedical Engineering
  • Vascular Biology
  • Cellular Mechanics

Background:

  • The relationship between smooth muscle structure and arterial function is not well understood.
  • Vascular smooth muscle cells (VSMCs) are crucial for regulating blood vessel tone and function.
  • Existing research often focuses on molecular markers rather than cellular architecture's impact on function.

Purpose of the Study:

  • To investigate how vascular smooth muscle cell architecture influences contractile output in engineered vascular tissues.
  • To determine if cellular shape, beyond traditional phenotype markers, affects tissue contraction force.
  • To elucidate the role of VSMC geometry in arterial physiology.

Main Methods:

  • Engineered in vitro vascular tissues using microcontact printing and muscular thin film technology.
  • Controlled VSMC alignment and geometry within the engineered tissues.
  • Tested contractile function in response to endothelin-1 stimulation.
  • Quantified contraction force and analyzed traditional contractile phenotype markers.

Main Results:

  • Engineered tissues exhibited in vivo-like VSMC spindle architecture and physiological contraction.
  • Tissues with elongated VSMCs generated significantly greater contraction force per unit area.
  • Increased contraction force was observed without corresponding increases in traditional contractile phenotype markers.
  • Cellular architecture emerged as a key determinant of tissue contractile function.

Conclusions:

  • Vascular smooth muscle cell architecture plays a critical role in determining the functional contractile output of arterial tissues.
  • Traditional phenotype characterization may be insufficient to fully define the contractile capacity of VSMCs in certain contexts.
  • Engineering cellular architecture offers a novel approach to understanding and potentially modulating vascular function.