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Related Concept Videos

Fats as Energy Storage Molecules01:06

Fats as Energy Storage Molecules

Triglycerides are a form of long-term energy storage molecules. They are made of glycerol and three fatty acids. To obtain energy from fat, triglycerides must first be broken down by hydrolysis into their two principal components, fatty acids and glycerol. This process, called lipolysis, takes place in the cytoplasm. The resulting fatty acids are oxidized by β-oxidation into acetyl-CoA, which is used by the Krebs cycle. The glycerol that is released from triglycerides after lipolysis directly...
Fats as Energy Storage Molecules01:06

Fats as Energy Storage Molecules

Triglycerides are a form of long-term energy storage molecules. They are made of glycerol and three fatty acids. To obtain energy from fat, triglycerides must first be broken down by hydrolysis into their two principal components, fatty acids and glycerol. This process, called lipolysis, takes place in the cytoplasm. The resulting fatty acids are oxidized by β-oxidation into acetyl-CoA, which is used by the Krebs cycle. The glycerol that is released from triglycerides after lipolysis directly...
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Lipids function as structural components of cellular membranes, in addition to acting as energy reservoirs and signaling molecules. They are thus crucial to all living organisms.  The three biologically important classes of lipids are triglycerides, phospholipids, and steroids.
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Evaluation of Lipid Droplet Size and Fusion in Bovine Hepatic Cells
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Published on: March 10, 2023

A comparative perspective on lipid storage in animals.

Kivanç Birsoy1, William T Festuccia, Mathieu Laplante

  • 1Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA. kbirsoy@wi.mit.edu

Journal of Cell Science
|May 10, 2013
PubMed
Summary

Lipid storage is a fundamental biological process conserved across all life. This study compares lipid storage mechanisms from simple organisms to vertebrates, focusing on adipose tissue development and regulation.

Keywords:
Adipocyte stem cellAdipose tissueInvertebrate fatLipid storageNutrients

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Area of Science:

  • Comparative biology
  • Cellular and molecular biology
  • Physiology

Background:

  • Lipid storage is an evolutionarily conserved process found in all organisms.
  • In Metazoa, specialized cells store lipids, but dedicated adipose tissue is unique to vertebrates.
  • Excessive lipid accumulation is linked to severe health issues like insulin resistance, type 2 diabetes, cardiovascular diseases, and cancer.

Purpose of the Study:

  • To provide a comparative overview of lipid storage mechanisms across unicellular and multicellular organisms.
  • To emphasize the development and maintenance of vertebrate adipose tissue.
  • To highlight molecular mechanisms and nutritional signals governing mammalian adipose tissue formation.

Main Methods:

  • Review of existing literature on lipid storage.
  • Comparative analysis of lipid storage strategies in diverse organisms.
  • Focus on in vitro cell culture, mouse models, and studies in genetically tractable lower organisms.

Main Results:

  • Lipid storage mechanisms show significant evolutionary conservation but also distinct adaptations.
  • Vertebrate adipose tissue represents a specialized evolutionary development for long-term lipid management.
  • Specific molecular pathways and nutritional cues regulate mammalian adipose tissue formation.

Conclusions:

  • Understanding comparative lipid storage provides insights into vertebrate adipose tissue biology.
  • Elucidating regulatory mechanisms is crucial for addressing metabolic diseases associated with lipid dysregulation.
  • Further research into conserved and divergent pathways can inform therapeutic strategies.