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Related Concept Videos

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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 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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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: Sep 22, 2025

Getting to Compliance in Forced Exercise in Rodents: A Critical Standard to Evaluate Exercise Impact in Aging-related Disorders and Disease
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APP processing: a biochemical competition influenced by exercise-induced signaling mediators?

Daniel M Marko1, Rebecca E K MacPherson1,2

  • 1Department of Health Sciences, Brock University, St. Catharines, Ontario, Canada.

American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
|May 24, 2022
PubMed
Summary

Regular exercise may help regulate amyloid-beta (Aβ) peptide production, a key factor in Alzheimer's disease (AD). This review explores how exercise-induced signaling molecules might influence Aβ plaque formation in the brain.

Keywords:
amyloid precursor proteinbrainexercisemuscleneuron

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Exercise Physiology

Background:

  • Neurodegenerative diseases like Alzheimer's disease (AD) are increasing in aging populations.
  • Excessive amyloid-beta (Aβ) peptide accumulation and plaque formation are hallmarks of AD, preceding clinical symptoms.
  • Aβ production and aggregation negatively impact neuronal function, survival, and overall brain health.

Purpose of the Study:

  • To review the potential role of exercise in regulating Aβ peptide production.
  • To identify and discuss exercise-induced signaling mediators that may influence Aβ production pathways.
  • To explore the mechanisms by which physical activity impacts brain health in the context of AD.

Main Methods:

  • Literature review of studies investigating exercise, Aβ peptides, and related signaling pathways.
  • Analysis of research on exercise-induced systemic signaling molecules.
  • Synthesis of evidence linking physical activity to the regulation of proteins involved in Aβ formation.

Main Results:

  • Exercise and physical activity show potential in modulating Aβ peptide production in the brain.
  • Exercise stimulates the release of various signaling mediators from diverse tissues.
  • These mediators are hypothesized to be key drivers of exercise's beneficial effects on brain health.

Conclusions:

  • Exercise may offer a non-pharmacological approach to managing Alzheimer's disease pathology.
  • Understanding exercise-induced signaling mediators is crucial for developing targeted interventions.
  • Further research is needed to fully elucidate the mechanisms linking exercise to Aβ regulation.