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Related Concept Videos

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.
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...
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Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
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Diversity in Cell Signaling Responses01:22

Diversity in Cell Signaling Responses

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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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Overview of Cell Signaling01:23

Overview of Cell Signaling

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Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
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Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

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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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Amplifying Signals via Enzymatic Cascade01:22

Amplifying Signals via Enzymatic Cascade

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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...
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Related Experiment Video

Updated: Jun 5, 2025

Author Spotlight: Manipulating Signaling in Zebrafish Embryos to Decode Cell Fate Decisions
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Author Spotlight: Manipulating Signaling in Zebrafish Embryos to Decode Cell Fate Decisions

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Exploring a complex constellation of signaling pathways.

Nathaniel C Nelson1, Matthias C Kugler1

  • 1Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, New York University Grossman School of Medicine, New York, United States.

Elife
|December 11, 2024
PubMed
Summary
This summary is machine-generated.

Alveolar myofibroblasts are crucial for lung development after birth. These cells integrate signals from various pathways to orchestrate lung growth.

Keywords:
bronchopulmonary dysplasiadevelopmental biologyhyperoxialung developmentmousemyofibroblastpostnatal

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Area of Science:

  • Pulmonary biology
  • Cell signaling
  • Developmental biology

Background:

  • Alveolar myofibroblasts play a key role in postnatal lung development.
  • Lung development involves complex cellular communication and signaling.

Purpose of the Study:

  • To investigate the signaling pathways influencing alveolar myofibroblast function.
  • To understand how these cells contribute to lung maturation.

Main Methods:

  • Analysis of gene expression in alveolar myofibroblasts.
  • Investigating cell-cell interactions and signaling cascades.

Main Results:

  • Identified specific signaling pathways that regulate alveolar myofibroblast activity.
  • Demonstrated the orchestrated input from multiple pathways.

Conclusions:

  • Alveolar myofibroblasts are central integrators of developmental signals.
  • Understanding these pathways is key to understanding lung development.