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Hedgehog Signaling Pathway02:33

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The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
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The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
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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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Quantitative PCR-based Assay to Measure Sonic Hedgehog Signaling in Cellular Model of Ciliogenesis
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Sonic hedgehog signalling pathway: a complex network.

Zia Choudhry1, Azadeh A Rikani2, Adnan Maqsood Choudhry3

  • 1Douglas Hospital Research Centre, Montreal, Quebec, Canada, H4H 1R3; ; Department of Human Genetics, McGill University, Montreal, Quebec, Canada, H3H 1B1; ; Division of Research & Medical Education, International Maternal and Child Health Foundation, Montreal, QC, Canada, H7S 2N5;

Annals of Neurosciences
|September 11, 2014
PubMed
Summary

Sonic Hedgehog (Shh) signaling is crucial for development and repair, guiding cell differentiation and neural pattern formation. Molecular changes in Shh protein impact its signaling pathways and reactivity.

Keywords:
AutoproteolysisHoloprosencephalyLipidationNeural tube patternNotochordSonic hedgehog

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Area of Science:

  • Developmental Biology
  • Molecular Signaling
  • Neuroscience

Background:

  • Sonic Hedgehog (Shh) signaling is a key pathway in multicellular development.
  • Shh regulates cell differentiation, organ formation, and tissue repair.
  • It plays a vital role in inducing neuronal populations in the central nervous system.

Purpose of the Study:

  • To provide an overview of the Sonic Hedgehog (Shh) signaling cascade.
  • To explore the molecular alterations in Shh protein structure and their impact.
  • To discuss the transduction pathways involved in Shh signaling.

Main Methods:

  • Literature review of Shh signaling pathways.
  • Analysis of molecular mechanisms in Shh protein.
  • Overview of developmental and regenerative processes regulated by Shh.

Main Results:

  • Shh signaling is essential for neural tube pattern formation.
  • Activation of Shh signaling involves molecular changes in the Shh protein.
  • These changes affect the protein's biophysical and biochemical properties.

Conclusions:

  • Shh signaling is a complex cascade with significant roles in development and regeneration.
  • Understanding Shh molecular dynamics is key to its biological functions.
  • Further research into Shh transduction pathways can illuminate its therapeutic potential.