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Related Concept Videos

Integrins01:10

Integrins

Animal and protozoan cells do not have cell walls to help maintain shape and provide structural stability. Instead, these eukaryotic cells secrete a sticky mass of carbohydrates and proteins into the spaces between adjacent cells. This network of proteins and molecules is called an extracellular matrix or ECM.
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Activation of Integrins01:15

Activation of Integrins

Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling."
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.
Role of Myosin in Cell Migration01:18

Role of Myosin in Cell Migration

Myosins are multimeric motor proteins involved in various cellular processes such as migration, adhesion, and proliferation. Myosin II is the most common type in animal cells, which binds and cross-links actin filaments.
Myosin II  is a hexamer comprising two heavy chains with globular heads and coiled-coil tails, two regulatory light chains, and two essential light chains. The ATPase sites on the myosin heads hydrolyze ATP, and the released phosphate generates the force for contraction. It is...
Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Satellite Stem Cells and Muscular Dystrophy01:21

Satellite Stem Cells and Muscular Dystrophy

Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...

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Related Experiment Video

Updated: May 31, 2026

Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads
07:55

Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads

Published on: March 8, 2017

Alpha 6 integrin is important for myogenic stem cell differentiation.

Karlijn J Wilschut1, Helena T A van Tol, Ger J A Arkesteijn

  • 1Department of Farm Animal Health, Faculty of Veterinary Medicine, Yalelaan 104, 3584 CM, Utrecht University, Utrecht, The Netherlands. karlijn.wilschut@ucsf.edu

Stem Cell Research
|July 19, 2011
PubMed
Summary
This summary is machine-generated.

Researchers identified a novel muscle progenitor cell population in pigs. Alpha-6 integrin expression serves as a biomarker for selecting potent myogenic stem cells with enhanced differentiation capabilities.

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Identification and Analysis of Myogenic Progenitors In Vivo During Acute Skeletal Muscle Injury by High-Dimensional Single-Cell Mass Cytometry
11:02

Identification and Analysis of Myogenic Progenitors In Vivo During Acute Skeletal Muscle Injury by High-Dimensional Single-Cell Mass Cytometry

Published on: December 1, 2023

Isolating Stem Cells from Soft Musculoskeletal Tissues
07:49

Isolating Stem Cells from Soft Musculoskeletal Tissues

Published on: July 5, 2010

Related Experiment Videos

Last Updated: May 31, 2026

Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads
07:55

Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads

Published on: March 8, 2017

Identification and Analysis of Myogenic Progenitors In Vivo During Acute Skeletal Muscle Injury by High-Dimensional Single-Cell Mass Cytometry
11:02

Identification and Analysis of Myogenic Progenitors In Vivo During Acute Skeletal Muscle Injury by High-Dimensional Single-Cell Mass Cytometry

Published on: December 1, 2023

Isolating Stem Cells from Soft Musculoskeletal Tissues
07:49

Isolating Stem Cells from Soft Musculoskeletal Tissues

Published on: July 5, 2010

Area of Science:

  • Muscle stem cell biology
  • Cellular and Molecular Medicine

Background:

  • Muscle regeneration relies on stem cells, primarily satellite cells.
  • Other muscle progenitor populations may exist with distinct properties.

Purpose of the Study:

  • To isolate and characterize non-satellite muscle progenitor cells from porcine tissue.
  • To investigate the role of alpha-6 integrin in myogenic differentiation.

Main Methods:

  • Isolation and purification of muscle progenitor cells using flow cytometry.
  • Analysis of stem cell populations based on alpha-6 integrin expression.
  • Quantitative reverse transcription PCR (qRT-PCR) for myogenic gene expression.
  • Functional assays involving inhibition of alpha-6 integrin.

Main Results:

  • Two distinct stem cell populations were identified: alpha-6 integrin positive and negative.
  • Alpha-6 integrin expression correlated with improved myotube formation and cell fusion.
  • qRT-PCR confirmed sustained expression of PAX7, MYF5, and DESMIN in alpha-6 integrin positive cells.
  • Inhibition of alpha-6 integrin impaired myogenic differentiation.

Conclusions:

  • A muscle progenitor cell population distinct from satellite cells can be isolated.
  • Alpha-6 integrin is a crucial biomarker for identifying highly myogenic porcine muscle stem cells.
  • Targeting alpha-6 integrin may enhance muscle regeneration strategies.