Related Experiment Video

Updated: May 15, 2025

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
09:32

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

Published on: June 15, 2017

8.7K

Regulation of MAP Kinase signaling by the insulin-like growth factor pathway during C. elegans vulval development

Matthew Eroglu1,2, W Brent Derry1,2

  • 1Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.

Micropublication Biology
|April 7, 2025
PubMed

Insights

Ras signaling, crucial for cell fate, can cause tumor-like growths when overactive. This study reveals how insulin signaling factors regulate Ras and identify a gene, mstr-1, involved in cell fate determination.

Area of Science:

  • Developmental biology
  • Cell signaling
  • Cancer research

Background:

  • Organ development relies on precise cell fate specification via signaling pathways.
  • Aberrant EGF-Ras-MAPK signaling can induce dedifferentiation and cancer.
  • In *C. elegans*, activated Ras/let-60 signaling causes tumor-like vulval lesions, dependent on insulin-like growth factor (IGF) signaling.

Purpose of the Study:

  • To investigate how factors downstream of the IGF receptor DAF-2 influence Ras signaling.
  • To identify novel regulators of cell fate in the context of Ras and IGF signaling.

Main Methods:

  • Utilized *C. elegans* as a model organism.
  • Studied gain-of-function mutations in Ras/let-60 and their interaction with IGF signaling.
  • Employed genetic analysis to identify downstream modifiers of Ras signaling.

Main Results:

  • Demonstrated that IGF signaling is essential for the tumor-like phenotype induced by Ras gain-of-function.
  • Identified the gene *mstr-1* (Zinc finger protein) as a regulator downstream of the IGF receptor DAF-2.
  • Showed that *mstr-1* influences cell fate determination in conjunction with Ras signaling.

Conclusions:

  • Insulin signaling modulates Ras pathway activity to control cell fate during organ development.
  • The gene *mstr-1*, homologous to mammalian Zfand3/5/6, plays a role in regulating cell fate.
  • Understanding these interactions provides insights into developmental processes and potential cancer mechanisms.

More Related Videos

Studying the Hypothalamic Insulin Signal to Peripheral Glucose Intolerance with a Continuous Drug Infusion System into the Mouse Brain08:32

Studying the Hypothalamic Insulin Signal to Peripheral Glucose Intolerance with a Continuous Drug Infusion System into the Mouse Brain

Published on: January 4, 2018

10.2K
Subcellular Fractionation for ERK Activation Upon Mitochondrial-derived Peptide Treatment07:55

Subcellular Fractionation for ERK Activation Upon Mitochondrial-derived Peptide Treatment

Published on: September 25, 2017

7.8K

Related Concept Videos

PI3K/mTOR/AKT Signaling Pathway01:22

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
3.3K
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
3.7K
Insulin: The Receptor and Signaling Pathways01:28

Insulin: The Receptor and Signaling Pathways

Insulin action is mediated through a receptor tyrosine kinase, akin to the IGF-1 receptor. The number of receptors per cell varies significantly, from 40 on erythrocytes to 300,000 on adipocytes and hepatocytes. The insulin receptor consists of linked α/β subunit dimers, forming a heterotetramer glycoprotein with two extracellular α subunits and two β subunits spanning the membrane. The α subunits inhibit the inherent tyrosine kinase activity of the β subunits, but...
1.0K
MAPK Signaling Cascades01:07

MAPK Signaling Cascades

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
5.0K
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

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...
6.2K
The JAK-STAT Signaling Pathway01:20

The JAK-STAT Signaling Pathway

Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...
8.5K