A Novel Dendritic Mesoporous Silica Based Sustained Hydrogen Sulfide Donor for the Alleviation of Adjuvant-induced Inflammation in Rats
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Purpose: S-propargyl-cysteine (SPRC), an excellent endogenous hydrogen sulfide (HS) donor, could elevate HS levels via the cystathionine γ-lyase CSE)/HS pathway both and . However, the immediate release of HS and daily administration of SPRC potentially limited its clinical use.
Methods: To solve the fore-mentioned problem, in this study, the dendritic mesoporous silica nanoparticles (DMSN) was firstly prepared, and a sustained HS delivery system consisted of SPRC and DMSN (SPRC@DMSN) was then constructed. Their release profiles, both and , were investigated, and their therapeutical effect toward adjuvant-induced arthritis (AIA) rats was also studied.
Results: The spherical morphology of DMSN could be observed under scanning Electron Microscope (SEM), and the transmission electron microscope (TEM) images showed a central-radiational pore channel structure of DMSN. DMSN showed excellent SPRC loading capacity and attaining a sustained releasing ability than SPRC both and , and the prolonged SPRC releasing could further promote the release of HS in a sustained manner through CSE/HS pathway both and . Importantly, the SPRC@DMSN showed promising anti-inflammation effect against AIA in rats was also observed.
Conclusions: A sustained HS releasing donor consisting of SPRC and DMSN was constructed in this study, and this sustained HS releasing donor might be of good use for the treatment of AIA.
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