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Related Concept Videos

Cancer Stem Cells and Tumor Maintenance02:40

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Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
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The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
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The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
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A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells.
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Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
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A Boolean model explains phenotypic plasticity changes underlying hepatic cancer stem cells emergence.

Alexis Hernández-Magaña1,2, Antonio Bensussen3, Juan Carlos Martínez-García3

  • 1Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, México.

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Cancer stem cells (CSCs) exhibit increased invasiveness and therapy resistance. Mathematical models reveal that mutations in key genes like p53 can promote the development of CSCs by altering cell plasticity.

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Area of Science:

  • Computational Biology
  • Cancer Research
  • Systems Biology

Background:

  • Cancer stem cells (CSCs) are implicated in tumor invasiveness and therapeutic resistance.
  • Understanding the mechanisms of CSC emergence and phenotypic plasticity is crucial for cancer treatment.
  • Mathematical-computational tools offer a way to integrate experimental data and model complex biological systems.

Purpose of the Study:

  • To develop a Boolean model of gene regulatory networks involved in hepatocellular carcinoma.
  • To identify key factors influencing phenotypic plasticity and CSC emergence.
  • To analyze the epigenetic landscape and its relation to cell states.

Main Methods:

  • Literature review to gather information on gene regulatory networks.
  • Construction of a Boolean model to simulate cell states and transitions.
  • Analysis of the epigenetic landscape and network robustness.

Main Results:

  • The model identified eight stable states representing different cell phenotypes (hepatocytes, mesenchymal cells) and states (senescent, quiescent, proliferative, stem-like).
  • Loss of p53, p16, RB, or activation of β-catenin and YAP1 enhances stem-like phenotypes.
  • p53 inactivation promotes the transition from proliferative to stem-like mesenchymal phenotypes.

Conclusions:

  • Phenotypic plasticity is a key factor in CSC emergence.
  • Mutations in specific genes can alter phenotypic plasticity, making CSC phenotypes more accessible.
  • Mathematical modeling provides insights into the complex regulatory mechanisms driving CSC development.