Kongensin A targeting PI3K attenuates inflammation-induced osteoarthritis by modulating macrophage polarization and alleviating inflammatory signaling

Mechanistic insights into Sanbi Decoction for osteoarthritis treatment based on network pharmacology and experimental validation

Sanbi Decoction (SBD) has demonstrated promising therapeutic potential in osteoarthritis (OA) treatment, yet its precise mechanisms remain unclear. This research combined computational and experimental approaches, including bioinformatics analysis, network pharmacology, molecular docking, molecular dynamics simulations, and laboratory validation, to investigate the mechanisms of action of SBD. A total of 114 active compounds and 113 intersecting targets were identified through TCMSP and multiple screening strategies. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses revealed that these targets are primarily involved in key signaling pathways, including the AGE-RAGE signaling pathway, IL-17 signaling pathway, and TNF signaling pathway. Among the active components, Shinflavanone, Gancaonin L, Xambioona, Phaseol, Gancaonin O, and Licoisoflavanone exhibited strong binding affinity and structural stability with core targets, as validated by molecular docking and molecular dynamics simulations. Experimental results confirmed that SBD alleviates oxidative stress, reduces inflammation, and protects cartilage by inhibiting the AGE-RAGE/JNK pathway. These findings highlight SBD's potential as a promising therapeutic agent for OA treatment.

CXCR4 regulates macrophage M1 polarization by altering glycolysis to promote prostate fibrosis

BACKGROUND

C-X-C receptor 4(CXCR4) is widely considered to be a highly conserved G protein-coupled receptor, widely involved in the pathophysiological processes in the human body, including fibrosis. However, its role in regulating macrophage-related inflammation in the fibrotic process of prostatitis has not been confirmed. Here, we aim to describe the role of CXCR4 in modulating macrophage M1 polarization through glycolysis in the development of prostatitis fibrosis.

METHODS

Use inducible experimental chronic prostatitis as a model of prostatic fibrosis. Reduce CXCR4 expression in immortalized bone marrow-derived macrophages using lentivirus. In the fibrotic mouse model, use adenovirus carrying CXCR4 agonists to detect the silencing of CXCR4 and assess the in vivo effects.

RESULTS

In this study, we demonstrated that reducing CXCR4 expression during LPS treatment of macrophages can alleviate M1 polarization. Silencing CXCR4 can inhibit glycolytic metabolism, enhance mitochondrial function, and promote macrophage transition from M1 to M2. Additionally, in vivo functional experiments using AAV carrying CXCR4 showed that blocking CXCR4 in experimental autoimmune prostatitis (EAP) can alleviate inflammation and experimental prostate fibrosis development. Mechanistically, CXCR4, a chemokine receptor, when silenced, weakens the PI3K/AKT/mTOR pathway as its downstream signal, reducing c-MYC expression. PFKFB3, a key enzyme involved in glucose metabolism, is a target gene of c-MYC, thus impacting macrophage polarization and glycolytic metabolism processes.