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Related Concept Videos

Adherens Junctions01:24

Adherens Junctions

Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
The endothelial cells...
Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
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...
Cell Adhesion Molecules - Types and Functions01:20

Cell Adhesion Molecules - Types and Functions

Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical interactions between cells and provide mechanical strength to tissues. They also function as receptors for signal transmission across the plasma membrane. The CAMs are broadly classified into four families - integrins, cadherins, selectins, and immunoglobulin-like CAMs (IgCAMs).
CAM Families
The Integrin family of proteins is primarily  involved in a...

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Related Experiment Video

Updated: Jun 29, 2026

Investigation of Macrophage Polarization Using Bone Marrow Derived Macrophages
10:07

Investigation of Macrophage Polarization Using Bone Marrow Derived Macrophages

Published on: June 23, 2013

Modulus-dependent macrophage adhesion and behavior.

E F Irwin1, K Saha, M Rosenbluth

  • 1Department of Bioengineering, University of California-Berkeley, Berkeley, CA 94720, USA.

Journal of Biomaterials Science. Polymer Edition
|October 16, 2008
PubMed
Summary
This summary is machine-generated.

Material stiffness influences macrophage behavior. Lower modulus surfaces reduce cell attachment, and specific stiffness ranges attenuate pro-inflammatory IL-8 release, impacting biomaterial performance and inflammation.

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Published on: June 29, 2016

Area of Science:

  • Biomaterials Science
  • Materials Science
  • Immunology

Background:

  • Macrophage response to biomaterials is critical for implant success, influencing inflammation and degradation.
  • Modulating material surface properties is a key strategy to control macrophage behavior and improve implant performance.

Purpose of the Study:

  • To investigate the effect of material modulus on macrophage attachment and activation.
  • To test the hypothesis that lower modulus surfaces reduce macrophage interaction with biomaterials.

Main Methods:

  • Synthesis of interpenetrating polymer network (IPN) coatings with tunable moduli.
  • Characterization of IPN surface chemistry (XPS) and modulus (AFM).
  • Assessment of THP-1 cell attachment and cytokine secretion (TNF-alpha, IL-10, IL-8, IL-1beta) on IPN surfaces.

Main Results:

  • THP-1 cells showed preferential attachment to stiffer coatings with identical surface chemistry.
  • Lower modulus surfaces (approx. 1.4 kPa) and very high modulus surfaces (approx. 348 kPa) attenuated the release of the pro-inflammatory cytokine IL-8.
  • Tumor Necrosis Factor-alpha (TNF-alpha) release did not significantly vary across different moduli.

Conclusions:

  • Material modulus plays a significant role in modulating macrophage attachment and inflammatory responses.
  • A biphasic response of IL-8 secretion suggests complex interactions between material stiffness and macrophage activation.
  • Optimizing biomaterial performance may require a nuanced approach, considering both surface chemistry and modulus to manage inflammatory cytokine profiles.