Glucocorticoids (GCs) are the most effective and commonly used drugs for the treatment of systemic lupus erythematosus (SLE). However, a large number of side effects occur after long-term or high-dose glucocorticoid treatment, which severely restricts the use of glucocorticoids. Reconstituted high-density lipoprotein (rHDL), an emerging nanocarrier, is promising for targeted delivery to sites of inflammation and macrophages. Here, we prepared a steroid-loaded recombinant high-density lipoprotein and evaluated its therapeutic efficacy in a murine macrophage cell line (RAW264.7) and a lupus (MRL/lpr mice) mouse model. The obtained corticosteroid-loaded nanomedicine, named PLP-CaP-rHDL, exhibited desirable characteristics. Pharmacodynamics studies revealed that the nanoparticles could significantly reduce the levels of inflammatory cytokines in the macrophages in vitro and also effectively alleviate lupus nephritis in MRL/lpr mice without causing obvious side effects at a dose of 0.25 mg/kg. Thus, our newly developed steroid-loaded rHDL nanocarriers hold a great potential for anti-inflammatory therapy with reduced side effects and may provide a precise targeted therapy for SLE.
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