Lipid droplet-mitochondria crosstalk in osteoarthritis: linking lipid routing to metabolic mismatch.
- 1Inner Mongolia Medical University, Hohhot, Inner Mongolia, China.
- 2Changchun University of Chinese Medicine, Changchun, Jilin, China.
- 3Shanxi University of Traditional Chinese Medicine, Jinzhong, Shanxi, China.
Abstract
Osteoarthritis (OA) is a whole-joint disease characterized by metabolic reprogramming beyond structural degeneration. Increasing evidence indicates that lipid droplets (LDs) regulate lipid storage, mobilization and intracellular lipid routing, while alterations in mitochondrial metabolism determine the capacity of chondrocytes to adapt to metabolic stress. However, LD accumulation alone is insufficient to define metabolic dysfunction, as it may represent either adaptive buffering or maladaptive retention. This review proposes a lipid flux-mitochondrial capacity matching framework to integrate lipid handling with mitochondrial oxidative capacity, redox regulation and quality control. We discuss how excessive lipid flux relative to mitochondrial capacity may promote oxidative stress, lipid peroxidation, ferroptosis, senescence and extracellular matrix disruption, whereas balanced lipid utilization supports chondrocyte homeostasis. Current evidence on LD biology, fatty acid oxidation, mitophagy and whole-joint metabolic communication is summarized, with clear distinction between direct OA evidence and findings from other cellular systems. Although organelle contact sites such as PLIN5-FATP4, PLIN3-VDAC3 and ESYT1/2-VAPB represent potential regulators of lipid routing, their functional relevance in OA chondrocytes remains to be established. Future studies integrating isotope tracing, metabolic flux analysis and dynamic organelle imaging are required to clarify how lipid routing and mitochondrial capacity jointly regulate OA progression.
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BibTeX
@article{meng2026lipid,
title = {{Lipid droplet-mitochondria crosstalk in osteoarthritis: linking lipid routing to metabolic mismatch.}},
author = {Gang Meng and Ruijie Hou and Ping Dong and Qiannan Chen and Xueyuan Li and Kai Hu and Zixuan Du and Rong Wang and Zhaoxin Zhong},
journal = {Frontiers in molecular biosciences},
year = {2026},
month = oct,
doi = {10.3389/fmolb.2026.1973436},
url = {https://europepmc.org/article/MED/42898765},
note = {CC BY},
}
RIS
TY - JOUR
TI - Lipid droplet-mitochondria crosstalk in osteoarthritis: linking lipid routing to metabolic mismatch.
AU - Gang Meng
AU - Ruijie Hou
AU - Ping Dong
AU - Qiannan Chen
AU - Xueyuan Li
AU - Kai Hu
AU - Zixuan Du
AU - Rong Wang
AU - Zhaoxin Zhong
PY - 2026
DA - 2026/10/05
JO - Frontiers in molecular biosciences
DO - 10.3389/fmolb.2026.1973436
UR - https://europepmc.org/article/MED/42898765
AB - Osteoarthritis (OA) is a whole-joint disease characterized by metabolic reprogramming beyond structural degeneration. Increasing evidence indicates that lipid droplets (LDs) regulate lipid storage, mobilization and intracellular lipid routing, while alterations in mitochondrial metabolism determine the capacity of chondrocytes to adapt to metabolic stress. However, LD accumulation alone is insufficient to define metabolic dysfunction, as it may represent either adaptive buffering or maladaptive retention. This review proposes a lipid flux-mitochondrial capacity matching framework to integrate lipid handling with mitochondrial oxidative capacity, redox regulation and quality control. We discuss how excessive lipid flux relative to mitochondrial capacity may promote oxidative stress, lipid peroxidation, ferroptosis, senescence and extracellular matrix disruption, whereas balanced lipid utilization supports chondrocyte homeostasis. Current evidence on LD biology, fatty acid oxidation, mitophagy and whole-joint metabolic communication is summarized, with clear distinction between direct OA evidence and findings from other cellular systems. Although organelle contact sites such as PLIN5-FATP4, PLIN3-VDAC3 and ESYT1/2-VAPB represent potential regulators of lipid routing, their functional relevance in OA chondrocytes remains to be established. Future studies integrating isotope tracing, metabolic flux analysis and dynamic organelle imaging are required to clarify how lipid routing and mitochondrial capacity jointly regulate OA progression.
SN - 2296-889X
ER -