Journal
MEDICAL SCIENCE MONITOR
Volume 26, Issue -, Pages -Publisher
INT SCIENTIFIC INFORMATION, INC
DOI: 10.12659/MSM.923386
Keywords
Apoptosis; Inflammation; Intervertebral Disc Degeneration; Toll-Like Receptor 4
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Funding
- Research Foundation Project of Hainan Medical University [HYPY201925]
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Background: Nucleus pulposus (NP) cell dysfunction and apoptosis contribute to disc degeneration. Dioscin, a natural ste roid saponin, has been demonstrated to have anti-inflammatory, antiapoptotic, and antioxidative effects in various diseases. However, little is known about the roles of dioscin in intervertebral disc degeneration. Material/Methods: To evaluate the roles of dioscin in disc degeneration and its specific mechanism, human NP cells were incubated with IL-1 beta and various concentrations of dioscin. Cell viability, extracellular matrix protein expression, catabolic factors, degree of apoptosis, inflammatory factors, and related signaling pathways were evaluated by western blotting, fluorescence immunostaining, TUNEL staining, and reverse transcription PCR. Results: Dioscin inhibited IL-1 beta-activated apoptotic signaling and catabolic activity in NP cells. Dioscin suppressed TLR4/NF-0 kappa B signaling, and attenuated the level of inflammatory mediators (IL-6, TNF-alpha) in IL-1 beta-stimulated human NP cells. Conclusions: Our work provides the first evidence that dioscin attenuates IL-1 beta-activated inflammation and catabolic activity in human NP cells through inhibiting the TLR4/NF-kappa B pathway, indicating that dioscin is a new potential candidate for clinical therapy to attenuate disc degeneration.
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