Mammalian lipid droplets: structural, pathological, immunological and anti-toxicological roles

Area of Science:

• Cell Biology
• Biochemistry
• Molecular Biology

Background:

• Mammalian lipid droplets (LDs) are cytosolic organelles with a neutral lipid core and a phospholipid monolayer membrane.
• LDs are increasingly recognized as dynamic participants in cellular homeostasis and vital functions.
• LD biogenesis occurs at the endoplasmic reticulum, but molecular mechanisms and regulation remain incompletely understood.

Purpose of the Study:

• To review the roles of mammalian LDs and their associated proteins.
• To focus on the involvement of LDs in pathological, immunological, and anti-toxicological processes.
• To elucidate the complex biogenesis and regulatory mechanisms of LDs.

Main Methods:

• Literature review of mammalian lipid droplet research.
• Analysis of the functions of LD-associated proteins.
• Examination of LD roles in cellular homeostasis and disease.

Main Results:

• LDs are involved in membrane homeostasis, hypoxia regulation, inflammation, oxidative status, and lipid peroxidation.
• LDs protect cells against toxic fatty acids and xenobiotics.
• Specific protein populations associated with LDs vary by cell type and function.

Conclusions:

• Mammalian LDs are crucial for diverse cellular functions beyond lipid storage.
• Understanding LDs and their proteins is vital for comprehending cellular responses to metabolic cues, toxins, and disease.
• Further research is needed to fully elucidate LD biogenesis and regulatory networks.