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Related Concept Videos

Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

52.9K
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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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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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. 
Graded and Abrupt Responses
Some signaling systems generate...
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Nitric Oxide Signaling Pathway01:28

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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Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

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Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
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Updated: Jan 10, 2026

Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
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Coenzyme Q10 and Intracellular Signalling Pathways: Clinical Relevance.

David Mantle1

  • 1Pharma Nord (UK) Ltd., Morpeth NE61 2DB, Northumberland, UK.

International Journal of Molecular Sciences
|November 27, 2025
PubMed
Summary
This summary is machine-generated.

Coenzyme Q10 (CoQ10) supplementation improves various disorders by modulating key intracellular signaling pathways. This review details how CoQ10 influences mitochondrial function, oxidative stress, and cell death mechanisms for therapeutic benefit.

Keywords:
AMPK/YAP/OPA1JAK/STATMAPKNf-κBNrf2/NQO1P13/AKT/mTORWNT/B-catenincoenzyme Q10hedgehog pathwayintracellular signalling pathways

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Area of Science:

  • Cellular Biology
  • Biochemistry
  • Pharmacology

Background:

  • Intracellular signaling pathways are crucial for cell function, regulating metabolism, mitochondrial activity, oxidative stress, inflammation, and cell death.
  • Coenzyme Q10 (CoQ10) supplementation has shown clinical benefits in various disorders, linked to improved mitochondrial function and reduced oxidative stress.

Purpose of the Study:

  • To elucidate the precise mechanisms by which CoQ10 exerts its beneficial effects.
  • To review the role of CoQ10 in mediating major intracellular signaling pathways and their clinical consequences.

Main Methods:

  • Literature review of randomized controlled trials and mechanistic studies on CoQ10.
  • Analysis of CoQ10's impact on key intracellular signaling cascades.

Main Results:

  • CoQ10's benefits are associated with its ability to promote normal mitochondrial function, reduce oxidative stress and inflammation, and modulate apoptosis/ferroptosis.
  • Evidence suggests CoQ10 mediates its effects through pathways like Nrf2/NQO1, NF-κB, P13/AKT/mTOR, MAPK, JAK/STAT, WNT/B-catenin, AMPK-YAP-OPA1, and hedgehog (Hh).

Conclusions:

  • CoQ10 plays a significant role in managing disorders by modulating critical intracellular signaling pathways.
  • Understanding these mechanisms provides a rationale for CoQ10's therapeutic applications and guides future research.