Abstract
To investigate the influence of tumor necrosis factor-stimulated gene-6 (TSG-6) secreted by bone mesenchymal stem cells (BMSCs) on blood brain barrier (BBB) after intracerebral hemorrhage (ICH) and its related mechanisms. BMSCs and astrocytes were isolated and induced by TNF-α and LPS respectively. The effect of TSG-6 secreted by BMSCs on the proliferation and apoptosis of astrocytes and inflammatory response were assessed by CCK8, flow cytometry, and ELISA respectively. Then we studied the effects of TSG-6 secreted by BMSCs through the paracrine mechanism on the integrity of BBB after ICH via NF-κB signaling pathway in vitro and in vivo. We successfully isolated BMSCs and astrocytes. After LPS treatment of astrocytes, IL-1β, IL-6, and TNF-α showed an upward trend. TSG-6 secreted by TNF-α-activated BMSCs could antagonize the inflammatory response in activated astrocytes. Through the co-culture of astrocytes and BMSCs and the ICH animal model, we found that TSG-6 regulates activated astrocytes by inhibiting the NF-κB signaling pathway and ameliorates BBB damage. Furthermore, we found that TNF-α-activated BMSCs secreted exosomes containing TSG-6 and played an anti-inflammatory effect. TSG-6 secreted by BMSCs regulates activated astrocytes by inhibiting the NF-κB signaling pathway, thereby ameliorating BBB damage.
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The data used to support the findings of this study are available from the corresponding author upon request.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (Nos.81760224) and Youth Foundation of the Second Affiliated Hospital of Nanchang University (2019YNQN12014).
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BT performed the experiment, analyzed the data, and wrote the original draft; MS, XX, DL, QT and XW performed the experiment; MC guided the experiment, reviewed and edited the manuscript.
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This study was approved by the animal experiment ethics committee of the First Affiliated Hospital of Nanchang University and the Second Affiliated Hospital of Nanchang University and conducted in strict accordance with the national institutes of health guidelines for the care and use of experimental animals.
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Tang, B., Song, M., Xie, X. et al. Tumor Necrosis Factor-stimulated Gene-6 (TSG-6) Secreted by BMSCs Regulates Activated Astrocytes by Inhibiting NF-κB Signaling Pathway to Ameliorate Blood Brain Barrier Damage After Intracerebral Hemorrhage. Neurochem Res 46, 2387–2402 (2021). https://doi.org/10.1007/s11064-021-03375-1
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DOI: https://doi.org/10.1007/s11064-021-03375-1