ArticleInternational journal of molecular sciences2026
Proteome and miRNAs Expression in Medication-Related Osteonecrosis of the Jaw.
Article in International journal of molecular sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Medication-related osteonecrosis of the jaw (MRONJ) is a complex condition associated with the use of antiresorptive drugs, such as bisphosphonates and denosumab. The condition is characterized by the presence of exposed bone in the maxillofacial region that fails to heal. MRONJ remains highly intractable, as its pathogenic mechanisms are not yet fully understood. It is therefore essential to elucidate the molecular mechanisms underlying the disease. MiRNA expression analysis and proteomic studies were performed on a selected cohort of patients with MRONJ on jawbone tissue, using qRT-PCR and 2D electrophoresis followed by mass spectrometry. MiRNAs and proteomics data validation was carried out by Western blot analysis of differentially expressed proteins highlighted by a proteome study and predicted targets of differentially expressed miRNAs. Nineteen miRNAs were overexpressed and two downregulated in jawbone tissue from all MRONJ patients. Notably, five of these dysregulated miRNAs are involved in the regulation of angiogenesis and desmosome functions, suggesting a potential link to the molecular alterations observed at the protein level. Proteomic analysis revealed decreased concentrations of the pigment epithelium-derived factor, and of desmoglein-1, a desmosomal cadherin. Validation analysis confirmed the dysregulation of pathways involved in bone remodeling and necroptosis. The pathophysiology of MRONJ arises from a complex interplay of factors, including impaired bone remodeling, affected angiogenesis, and altered cell adhesion and differentiation mechanisms, ultimately leading to necroptosis. Through proteomic analysis and validation of miRNA expression, our study proposes specific molecular alteration in MRONJ-compromised bone tissue, involving desmosomal component imbalance and angiogenesis inhibition.
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