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Related Concept Videos

Activation of Integrins01:15

Activation of Integrins

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Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling."
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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.
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Integrins01:10

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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.
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The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
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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...
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Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
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Author Spotlight: Development of a Method for Identifying Small Molecular Antagonists of β2 Integrin Activation
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Targeting integrin pathways: mechanisms and advances in therapy.

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Integrins are key cell receptors involved in health and disease. Developing new integrin-targeting drugs requires understanding their complex regulation and clinical needs for improved therapies.

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Area of Science:

  • Cell Biology
  • Pharmacology
  • Biochemistry

Background:

  • Integrins are crucial transmembrane receptors mediating cell adhesion and signal transduction.
  • Their function depends on a dynamic balance of activation states, influenced by protein interactions and trafficking.
  • Integrins are implicated in various health and disease states, making them significant therapeutic targets.

Purpose of the Study:

  • To provide a comprehensive review of integrin family members and their signaling pathways.
  • To highlight current efforts in developing integrin-based diagnostics and therapeutics.
  • To discuss strategies for improving the success rate of integrin-targeted clinical trials.

Main Methods:

  • Systematic review of integrin family members.
  • Analysis of integrin-mediated downstream signal transduction.
  • Review of current and emerging integrin-targeting drugs and imaging agents.

Main Results:

  • Seven integrin-targeting drugs are currently marketed.
  • Approximately 90 integrin-based therapeutic drugs or imaging agents are in clinical studies.
  • Success in integrin drug discovery hinges on understanding regulatory mechanisms and unmet clinical needs.

Conclusions:

  • A deep understanding of integrin biology is essential for successful therapeutic development.
  • Future efforts should focus on addressing unmet clinical needs and optimizing clinical trial strategies.
  • Integrin-based therapies and diagnostics represent a promising area for clinical translation.