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Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
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The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
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The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
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Insulin action is mediated through a receptor tyrosine kinase, akin to the IGF-1 receptor. The number of receptors per cell varies significantly, from 40 on erythrocytes to 300,000 on adipocytes and hepatocytes. The insulin receptor consists of linked α/β subunit dimers, forming a heterotetramer glycoprotein with two extracellular α subunits and two β subunits spanning the membrane. The α subunits inhibit the inherent tyrosine kinase activity of the β subunits, but...
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Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the  phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
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Nitric Oxide Signaling Pathway

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Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...
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Related Experiment Video

Updated: Jan 25, 2026

Formation of Human Periodontal Ligament Cell Spheroids on Chitosan Films
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Crosstalk between chitosan and cell signaling pathways.

Behrouz Farhadihosseinabadi1, Amir Zarebkohan2,3, Mohamad Eftekhary1

  • 1Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Cellular and Molecular Life Sciences : CMLS
|April 29, 2019
PubMed
Summary

This review explores chitosan (CS) interactions with cells in tissue engineering (TE). Understanding this cell-biomaterial crosstalk is key for advancing regenerative medicine and clinical applications of CS scaffolds.

Keywords:
CancerCell interactionChitosanImmune systemIntracellular signalingMolecular pathwaysNerve systemRegulationStem cell

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Tissue engineering (TE) is rapidly advancing, with biomaterial scaffolds crucial for tissue regeneration.
  • Cell-biomaterial interactions significantly influence cell behavior, impacting TE success.
  • Chitosan (CS) is a widely used biomaterial in TE due to its favorable properties.

Purpose of the Study:

  • To review the crosstalk between chitosan and various cell types.
  • To elucidate the biological effects and mechanisms of chitosan on cellular activities.
  • To provide a roadmap for optimizing chitosan applications in TE and regenerative medicine.

Main Methods:

  • Literature review of studies on chitosan-cell interactions.
  • Analysis of reported biological effects of chitosan on cell differentiation, proliferation, and migration.
  • Synthesis of findings to understand chitosan's role in tissue regeneration.

Main Results:

  • Chitosan exhibits significant crosstalk with diverse cell types.
  • Its biocompatibility, antibacterial activity, and biodegradability are well-established.
  • Specific cellular responses to chitosan vary depending on cell type and material properties.

Conclusions:

  • Understanding chitosan-cell crosstalk is essential for effective TE applications.
  • This knowledge can guide the development of advanced chitosan-based scaffolds.
  • Optimized use of chitosan holds promise for future regenerative medicine strategies.