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Related Concept Videos

Metabolic States of the Body: Fasting and Starvation01:24

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During the initial hours of fasting, the body uses up its glycogen stores as an energy source. Once these glycogen reserves are depleted, the body begins breaking down stored triglycerides and structural proteins. During this stage, glycerol becomes a key substrate for gluconeogenesis, while free fatty acids undergo beta-oxidation to provide energy for tissues, such as skeletal muscle. In the fasting state, the body spares protein breakdown as much as possible to conserve muscle and structural...
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Metabolic States of the Body: The Postabsorptive State01:18

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The postabsorptive state usually starts about four hours after a meal and lasts until the next meal is eaten. During this time, the digestive system stops absorbing nutrients, and the body uses stored energy reserves to maintain stable blood glucose levels.
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Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
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Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
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Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
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Updated: Jun 19, 2025

Analyzing Starvation-Induced Autophagy in the Drosophila melanogaster Larval Fat Body
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Cellular response during cellular starvation: A battle for cellular survivability.

Tithi Bhowmick1, Souradeep Biswas2, Avinaba Mukherjee1

  • 1Department of Zoology, Charuchandra College, University of Calcutta, Kolkata, India.

Cell Biochemistry and Function
|July 25, 2024
PubMed
Summary

Cellular starvation, triggered by nutrient and oxygen deprivation, alters cell metabolism and stress responses. Understanding these mechanisms can reveal new cancer therapy strategies by inducing cell death pathways.

Keywords:
cell deathcell starvationcellular survivabilityhypoxiametabolism

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Cellular starvation is a critical condition arising from the lack of essential nutrients like amino acids, glucose, and oxygen.
  • This deprivation significantly impacts cellular respiration, metabolism, and stress response pathways.
  • Prolonged starvation can lead to cell death via autophagy or apoptosis.

Purpose of the Study:

  • To elucidate the intricate mechanisms underlying cellular starvation.
  • To summarize the diverse cellular responses to nutrient and oxygen deprivation.
  • To explore the potential of induced cellular starvation as a therapeutic strategy in cancer treatment.

Main Methods:

  • This review synthesizes existing research on cellular starvation.
  • It analyzes the molecular and cellular adaptations cells employ to survive starvation.
  • The study examines signaling cascades involved in combating starvation conditions.

Main Results:

  • Cells activate altered metabolic and protein activities to combat starvation.
  • Modulated signaling pathways are crucial for cellular survival during deprivation.
  • Sustained starvation ultimately results in cell death.

Conclusions:

  • Understanding cellular starvation provides insights into cell survivability mechanisms.
  • Targeting cellular starvation pathways offers potential for novel cancer therapies.
  • Further research can leverage this knowledge to combat cellular diseases.