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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.
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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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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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Many receptor binding ligands are hydrophilic; they do not cross the cell membrane but bind to cell-surface receptors. Thus, their message must be relayed by second messengers present in the cell cytoplasm. There are several second messenger pathways, each with its own way of relaying information. For example, the G protein-coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol pathway is active when the receptor induces...
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Related Experiment Video

Updated: Jun 23, 2025

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Inter- and Intracellular Signaling Pathways.

Gergana Dobreva1,2, Joerg Heineke3,4

  • 1ECAS (European Center for Angioscience), Department of Cardiovascular Genomics and Epigenomics, Mannheim Faculty of Medicine, Heidelberg University, Mannheim, Germany. gergana.dobreva@medma.uni-heidelberg.de.

Advances in Experimental Medicine and Biology
|June 17, 2024
PubMed
Summary
This summary is machine-generated.

Congenital heart disease (CHD) arises from disrupted intercellular communication during heart development. Understanding these molecular signaling pathways is crucial for addressing lifelong complications like heart failure in adult CHD patients.

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Area of Science:

  • Cardiovascular biology
  • Developmental biology
  • Molecular genetics

Background:

  • Cardiovascular diseases are the leading global cause of death.
  • Advances in surgery allow most congenital heart disease (CHD) patients to survive into adulthood.
  • Adult CHD survivors often experience long-term complications, including early-onset heart failure, due to hemodynamic overload.

Purpose of the Study:

  • To review the inter- and intracellular signaling mechanisms involved in heart development and function.
  • To understand the molecular basis of heart defects and lifelong complications in CHD.
  • To explore cellular communication pathways in both embryonic and adult hearts.

Main Methods:

  • Review of scientific literature on cardiac signaling.
  • Focus on findings from genetically modified mouse models.
  • Analysis of intercellular communication networks (epicardium, endocardium, myocardium, cardiomyocytes, endothelial cells, fibroblasts).

Main Results:

  • Congenital heart disease results from disrupted morphogenetic patterning during early pregnancy.
  • Intercellular communication is critical for normal cardiac development.
  • Similar cell crosstalk occurs in the postnatal heart under pathological hemodynamic overload.
  • Intracellular signaling circuits coordinate cardiac development and function.

Conclusions:

  • Understanding molecular signaling in the heart is vital for addressing CHD.
  • Cellular communication pathways are key targets for future research in congenital and acquired heart conditions.
  • Insights from mouse models provide a foundation for understanding human cardiac development and disease.