Abstract
Rheumatoid arthritis (RA), a chronic systemic autoimmune disease, stimulates various immune cells especially macrophages, causing release of various proinflammatory cytokines such as TNF-α leading to persistent synovitis. Chloroquine, an anti-malarial drug inhibits the production of TNF-α, thus, halting the disease progression. The aim of the present study was fabrication, characterization and demonstration of kinetic and dynamic efficacy of chloroquine loaded solid lipid nanoparticles (CQ-SLNs) in arthritic rats and in lowering TNF-α levels. CQ-SLNs were prepared using melt homogenization method and subjected to lyophilization. The particle size, zeta potential, PDI and entrapment efficiency were found to be 113.6±0.15nm, -27.8±1.21mV, 0.125±0.03 and 93.45±0.43% respectively. Ex vivo endocytic uptake studies revealed engrossment of endocytic pathways in the uptake of SLN from intestine. Plasma drug profile upon pharmacokinetic evaluation demonstrated increased AUC, half-life and decreased elimination rate of the drug. Pharmacodynamic studies revealed reduction in the paw volume, bone erosion and cartilage destruction, the same was also reflected in histopathological studies. The TNF-α ELISA concluded that the TNF-α level was s...Continue Reading
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