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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,...
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.
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...
Glaucoma: Overview01:25

Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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...
Selectins01:25

Selectins

Cell adhesion is  an essential aspect of multicellularity. While stable cell interactions usually occur between cells of the same type, transient cell interactions occur between cells of different tissue types, such as between neutrophils and endothelial cells. Selectins are one class of cell adhesion molecules (CAMs) that bind carbohydrate ligands to form transient cell adhesion. They are rod-like proteins with a long extracellular part of variable length ending with the lectin domain, which...

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Differential Impacts on Proteoglycan Expression in the Response to Lens Wounding in Reparative and Pro-fibrotic Microenvironments.

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Matrix molecules associated with both regulation of inflammation and pathogenic outcomes associated with the surface of the lens in the eyes of EAU mice.

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Shared Phenotypes of Immune Cells Recruited to the Cornea and the Surface of the Lens in Response to Formation of Corneal Erosions.

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The link of FOXO1 and FOXO4 transcription factors to development of the lens.

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Related Experiment Video

Updated: Jul 3, 2026

Assessment of Zebrafish Lens Nucleus Localization and Sutural Integrity
07:16

Assessment of Zebrafish Lens Nucleus Localization and Sutural Integrity

Published on: May 6, 2019

Integrins in lens development and disease.

Janice Walker1, A Sue Menko

  • 1Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA.

Experimental Eye Research
|August 2, 2008
PubMed
Summary

Integrins, cell surface receptors, regulate lens development and cell phenotype. This review examines their role in lens fibrotic diseases, including posterior capsule opacification and anterior subcapsular cataract.

Area of Science:

  • Cell Biology
  • Ophthalmology
  • Extracellular Matrix Biology

Background:

  • Integrins are crucial cell surface receptors mediating bidirectional cell signaling.
  • They regulate essential cellular processes in development and disease.
  • Integrins interact with extracellular matrix proteins, influencing cell behavior.

Purpose of the Study:

  • To review the literature on integrin function in the ocular lens.
  • To analyze the role of integrins in lens development and cell differentiation.
  • To investigate integrin involvement in lens fibrotic diseases like PCO and ASC.

Main Methods:

  • Literature review of studies on integrins in the lens.
  • Analysis of integrin signaling pathways in lens epithelial cells.

More Related Videos

Whole Mount Imaging to Visualize and Quantify Peripheral Lens Structure, Cell Morphology, and Organization
05:45

Whole Mount Imaging to Visualize and Quantify Peripheral Lens Structure, Cell Morphology, and Organization

Published on: January 19, 2024

Related Experiment Videos

Last Updated: Jul 3, 2026

Assessment of Zebrafish Lens Nucleus Localization and Sutural Integrity
07:16

Assessment of Zebrafish Lens Nucleus Localization and Sutural Integrity

Published on: May 6, 2019

Whole Mount Imaging to Visualize and Quantify Peripheral Lens Structure, Cell Morphology, and Organization
05:45

Whole Mount Imaging to Visualize and Quantify Peripheral Lens Structure, Cell Morphology, and Organization

Published on: January 19, 2024

  • Focus on integrin regulation of TGF-beta in fibrotic lens conditions.
  • Main Results:

    • Integrins are vital for lens cell differentiation and maintaining the lens epithelial cell phenotype.
    • Integrin signaling pathways are implicated in the pathogenesis of PCO and ASC.
    • TGF-beta signaling, modulated by integrins, plays a key role in lens fibrotic diseases.

    Conclusions:

    • Integrins are critical regulators of lens biology, impacting development and disease.
    • Targeting integrin-mediated signaling pathways may offer therapeutic strategies for fibrotic lens disorders.
    • Further research into integrin function is essential for understanding and treating lens opacities.