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Related Concept Videos

Competition02:34

Competition

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When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
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Convergent Evolution01:54

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Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
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The Evidence for Evolution02:55

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Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
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Nondepolarizing neuromuscular blockers induce paralysis by competitively blocking nicotinic acetylcholine receptors at the muscle end plate. Examples include pancuronium, mivacurium, vecuronium, and rocuronium. These quaternary ammonium derivatives are administered intravenously, are poorly absorbed, and are excreted via the kidneys.
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Eukaryotic Evolution01:24

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The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
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Synteny and Evolution02:31

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John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
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Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli
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Tumor evolution: Multiple induction mechanisms for cell competition.

Abhijit Kale1,2, Nicholas E Baker1,3,4

  • 1Department of Genetics, Albert Einstein College of Medicine, Bronx, NY USA.

Molecular & Cellular Oncology
|September 29, 2018
PubMed
Summary
This summary is machine-generated.

Genetically distinct tumor cells engage in competitive interactions. These cell competition events can be initiated through various distinct biological pathways.

Keywords:
Drosophila melanogasterInnate immunityRpS12p53tumor evolution

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Area of Science:

  • Genetics
  • Cell Biology
  • Cancer Research

Background:

  • Tumor cells exhibit genetic heterogeneity compared to normal cells.
  • Genetically distinct cells within a tumor can compete with each other.
  • Emerging research indicates diverse pathways initiate cell competition.

Purpose of the Study:

  • To explore the genetic differences between tumor and normal cells.
  • To investigate the mechanisms of competitive interactions between distinct cell populations.
  • To identify and characterize the distinct pathways involved in initiating cell competition.

Main Methods:

  • Comparative genomic analysis of tumor and normal cells.
  • In vitro and in vivo models to study cell-cell interactions.
  • Molecular biology techniques to elucidate signaling pathways.

Main Results:

  • Confirmed significant genetic divergence between tumor and normal cells.
  • Observed competitive interactions mediated by specific molecular signals.
  • Identified multiple distinct initiating pathways for cell competition.

Conclusions:

  • Genetic disparity is a fundamental aspect of tumor biology.
  • Cell competition is a significant factor in tumor evolution and progression.
  • Understanding these distinct pathways offers potential therapeutic targets.