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Related Concept Videos

Diversity in Cell Signaling Responses01:22

Diversity in Cell Signaling Responses

The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity. 
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Some signaling systems generate...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Amplifying Signals via Enzymatic Cascade01:22

Amplifying Signals via Enzymatic Cascade

When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze the...
Whole Body Regeneration01:33

Whole Body Regeneration

Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential; even...
Overview of Regeneration and Repair01:19

Overview of Regeneration and Repair

Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
Regeneration
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Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...

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Related Experiment Video

Updated: May 11, 2026

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
09:32

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

Published on: June 15, 2017

Complement-triggered pathways orchestrate regenerative responses throughout phylogenesis.

Dimitrios C Mastellos1, Robert A Deangelis, John D Lambris

  • 1National Center for Scientific Research "Demokritos", Aghia Paraskevi, Athens 15310, Greece.

Seminars in Immunology
|May 21, 2013
PubMed
Summary
This summary is machine-generated.

Understanding tissue regeneration is key for regenerative medicine. This study explores how complement pathways interact with other signals to drive tissue repair and regeneration, offering new therapeutic targets.

Keywords:
ASPAnaphylatoxinsC3a receptorC3aRC5a receptorC5aRCCl(4)ComplementDAMPsECMEMTHSCsHSPCsIPEInflammationInnate immunityMACMSCsPHxRPETissue plasticityVertebrate regenerationacylation-stimulating proteincarbon tetrachloridedanger-associated molecular patternsepithelial-to-mesenchymal transitionextracellular matrixhematopoietic stem cellshematopoietic stem-like progenitor cellsiris pigmented epithelialmembrane attack complexmesenchymal stem cellspartial hepatectomyretinal pigmented epithelium

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Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
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Optogenetic Signaling Activation in Zebrafish Embryos
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The Power of Simplicity: Sea Urchin Embryos as in Vivo Developmental Models for Studying Complex Cell-to-cell Signaling Network Interactions
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Published on: February 16, 2017

Area of Science:

  • Regenerative Medicine
  • Immunology
  • Developmental Biology

Background:

  • Adult tissue plasticity, cell reprogramming, and organ regeneration are critical challenges in regenerative medicine.
  • Strategies to enhance tissue regeneration could address donor organ shortages and improve transplantation outcomes.
  • While lower vertebrates exhibit remarkable regeneration, the underlying molecular interactions in mammals remain unclear.

Purpose of the Study:

  • To elucidate the mechanistic insights into the crosstalk between complement signaling and cytokine/growth factor pathways in tissue regeneration.
  • To provide a conceptual framework for targeting complement pathways for regenerative therapeutics.

Main Methods:

  • Review and synthesis of existing literature on tissue regeneration, cell reprogramming, and immune responses.
  • Analysis of the role of complement system activation in tissue injury, remodeling, and regeneration.
  • Examination of the interplay between complement, cytokine, and growth factor signaling.

Main Results:

  • Complement activation is implicated in tissue and organ regeneration across species.
  • Complement-triggered pathways modulate tissue reprogramming, pattern formation, and regeneration.
  • Crosstalk between complement and cytokine/growth factor signaling is crucial for driving regeneration.

Conclusions:

  • Complement plays a significant role in modulating tissue regeneration.
  • Targeting complement pathways presents a novel therapeutic strategy for enhancing regenerative capacity.