Mitochondrial Dynamics in Adipose Tissue Metabolism

Adipose tissue is not merely a passive lipid depot but a highly dynamic organ whose capacity to store and expend energy depends critically on the behaviour of its mitochondria. Mitochondrial dynamics – encompassing biogenesis, fusion, fission and selective autophagic removal of damaged organelles (mitophagy) – orchestrate the adaptability of fat cells to nutritional, hormonal and thermal cues. In white adipocytes, these processes regulate lipid droplet turnover, govern basal respiration and modulate insulin‐sensitivity, whereas in brown and beige adipocytes they underpin the thermogenic programme by maintaining a dense network of cristae and high oxidative phosphorylation capacity. Dysregulation of mitochondrial dynamics contributes to impaired lipid processing, ectopic fat deposition and a pro-inflammatory state that drives systemic insulin resistance. Conversely, enhancement of mitochondrial biogenesis and controlled fission–fusion cycles promotes fatty acid oxidation, adaptive thermogenesis and improved glucose homeostasis. Recent mechanistic insights have revealed key regulatory nodes including the PGC-1 co-activator axis, mitofusins and fission-related GTPases, which integrate nutrient signalling with organelle quality control. Understanding how adipose mitochondria remodel in response to cold exposure, β-adrenergic stimulation or pharmacological interventions offers promising avenues for tackling obesity and its metabolic complications by reigniting cellular energy expenditure in human populations worldwide.

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Mitochondrial Dynamics in Adipose Tissue Metabolism publication trend

The graph below shows the total number of articles in mitochondrial dynamics in adipose tissue metabolism across all publications each year (not limited to Nature Index journals).

Technical terms

Mitochondrial biogenesis: the process by which cells increase mitochondrial number and mass through activation of nuclear and mitochondrial gene programmes.

Fusion: joining of two mitochondria into a single organelle, which promotes mixing of mitochondrial contents and maintenance of mitochondrial DNA integrity.

Fission: division of a mitochondrion into two separate organelles, facilitating removal of damaged units and adjusting mitochondrial distribution.

Mitophagy: selective autophagic degradation of dysfunctional mitochondria to safeguard cellular health and energy efficiency.

Oxidative phosphorylation (OXPHOS): the mitochondrial pathway that generates ATP by transferring electrons through respiratory chain complexes to oxygen.

Thermogenesis: heat production in brown or beige adipocytes driven by mitochondrial uncoupling proteins, which dissipate proton motive force as heat rather than ATP.

Beige adipocyte: a white fat cell that acquires brown fat-like mitochondrial richness and thermogenic capacity in response to stimuli such as cold or β-adrenergic signals.

References

1. Adipocyte Mitochondria: Deciphering Energetic Functions across Fat Depots in Obesity and Type 2 Diabetes. International Journal of Molecular Sciences (2024).
2. β-Hydroxy-β-methyl Butyrate Regulates the Lipid Metabolism, Mitochondrial Function, and Fat Browning of Adipocytes. Nutrients (2023).
3. Label-free optical metabolic imaging of adipose tissues for prediabetes diagnosis. Theranostics (2023).