Related Experiment Video
Updated: Oct 25, 2025
06:51
Retinal Explant of the Adult Mouse Retina as an Ex Vivo Model for Studying Retinal Neurovascular Diseases
Published on: December 9, 2022
4.6K
Integrins: An Important Link between Angiogenesis, Inflammation and Eye Diseases
Małgorzata Mrugacz1, Anna Bryl1, Mariusz Falkowski2
1Department of Ophthalmology and Eye Rehabilitation, Medical University of Bialystok, 15-089 Bialystok, Poland.
Cells
|August 7, 2021
Summary
Integrins, cell adhesion molecules crucial for cell attachment and signaling, play key roles in ocular inflammation, infection, and angiogenesis. Targeting integrins offers potential new therapies for eye disorders.
Area of Science:
- Cell Biology
- Ophthalmology
- Immunology
Background:
- Integrins are cell adhesion molecules (CAMs) mediating cell-extracellular matrix (ECM) interactions and signal transduction.
- They are involved in vital cellular processes including proliferation, migration, apoptosis, and tissue repair.
- Integrins also function as receptors for viruses like SARS-CoV-2 and are implicated in inflammation and angiogenesis.
Purpose of the Study:
- To review the structure, classification, and function of integrins.
- To explore the role of integrins in ocular inflammation, infection, and angiogenesis.
- To discuss the therapeutic potential of integrin receptors and ligands in eye disorders.
Main Methods:
- Review of existing human and animal research.
- Synthesis of evidence on integrin structure, function, and involvement in ocular disease pathways.
- Analysis of clinical relevance and therapeutic targeting strategies.
Main Results:
- Integrins are fundamental to cell adhesion, ECM signaling, and numerous biological activities.
- They play a significant role in both normal ocular development and pathological processes.
- Evidence highlights integrins' involvement in ocular inflammation, infection, and angiogenesis.
Conclusions:
- Integrins are critical for maintaining ocular tissue homeostasis and are implicated in disease pathogenesis.
- Understanding integrin function provides insights into ocular inflammation, infection, and angiogenesis.
- Integrin-targeted therapies represent a promising avenue for treating various eye disorders.
Related Concept Videos
01:15Activation of Integrins
4.1K
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...
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...
4.1K
01:17Intracellular Signaling Affects Focal Adhesions
3.1K
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...
Some...
3.1K
01:10Mechanism of Angiogenesis
6.1K
Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
6.1K
01:10Integrins
4.5K
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,...
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,...
4.5K
01:24Regulation of Angiogenesis and Blood Supply
2.9K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.9K
01:24Overview of Cell-Matrix Interactions
8.1K
The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
8.1K