ArticleInnovation (Cambridge (Mass.))2026
Hybrid extracellular vesicles drive irreversible mitochondria damage and TCA metabolite deficiency-related chondrocyte senescence.
Article in Innovation (Cambridge (Mass.)), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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Who cites it
3 citing papers in PubMed.
- From pathogenic to reparative: Context-Dependent function of extracellular vesicles in osteoarthritis.Bioactive materials · 2027Review
- The mechano-immune-vesicle regulatory circuit: a systems framework for bone homeostasis and regeneration.Bioactive materials · 2026Review
- Mammalian cell-derived extracellular vesicles remodel the immune-repair microenvironment in osteoarthritis: from pathological signal transmission to regenerative therapy.Frontiers in immunology · 2026Review
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Authors and funding
12 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Metabolic and inflammatory stresses play crucial roles in osteoarthritis (OA). However, the reasons behind the difficulty in correcting impaired metabolism and cellular dysfunction in OA chondrocytes remain unclear. Given the metabolic modulation effect of extracellular vesicles (EVs), we asked whether endogenous EVs play a critical role in OA. Here, we identified a subtype of hybrid extracellular vesicles (hEVs) enriched in the joint fluid from OA patients, correlating with OA severity. These hEVs exhibited dual markers from proinflammatory macrophages and chondrocytes, promoting chondrocyte uptake and enhancing metabolic regulatory capability. hEV administration increased chondrocyte damage, characterized by enhanced mitochondrial defects and cellular aging in OA models. Unlike the reversible metabolic damage induced by inflammation in cartilage stem/progenitor cells (CSPCs), hEVs induced irreversible mitochondrial fragmentation and sustained cellular aging, even after stimulus removal. Notably, while hEVs promoted a metabolic shift toward glycolysis in OA CSPCs, blocking glycolysis alone failed to restore CSPC dysfunction. Mechanistically, hEVs decreased the mitochondrial membrane potential (ΔΨm) in an ADP/ATP translocase 1 (ADT1)-dependent manner, contributing to irreversible mitochondria fragmentation. As a result, hEVs depleted tricarboxylic acid metabolites, particularly acetyl-CoA and α-ketoglutarate (α-KG), associated with altered histone acetylation and methylation in OA CSPCs. Thus, combination therapy with an ADT1 inhibitor, supplemented with acetyl-CoA and α-KG, corrected hEV-induced metabolic reprogramming and cellular fate changes, restoring impaired chondrogenesis and aging in OA CSPCs and OA models. This study reveals hEVs as unrecognized OA pathogenic drivers, linking EV-mediated irreversible mitochondria damage to chondrocyte aging, and opens a new avenue for OA treatment.
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