{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T21:21:13Z","timestamp":1792272073454,"version":"4.4.0"},"reference-count":27,"publisher":"IMR Press","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["International Journal for Vitamin and Nutrition Research"],"published-print":{"date-parts":[[2023,8]]},"abstract":"<jats:p> Abstract: Capsaicin, the main constituent in chili, is an extremely spicy vanillin alkaloid and is found in several Capsicum species in China. Traditionally, it has been used to treat inflammatory diseases such as allergic rhinitis, neuralgia after shingles, refractory female urethral syndrome, spontaneous recalcitrant anal pruritus, and solid tumors. Constant stimulation of the body by inflammatory factors can lead to chronic inflammation. Capsaicin possesses anti-inflammatory activity; however, the underlying mechanism is unknown. We investigated the effect of capsaicin on the secretion of macrophage inflammatory factors in a lipopolysaccharide-induced inflammation model using 56 healthy, SPF grade, BALB\/c mice. To this end, mice peritoneal macrophages were isolated and stimulated with lipopolysaccharide (1 \u03bcg\/mL) and capsaicin (25, 50, 75, or 100 \u03bcg\/mL) for 24 h. At all concentrations tested, capsaicin significantly promoted the phagocytosis of neutral red dye by macrophages. Furthermore, the gene expression and secretion of inflammatory cytokines significantly increased after induction with lipopolysaccharide (P&lt;0.01); the interleukin (IL)-6 level was 204 \u03bcg\/mL, tumor necrosis factor (TNF)-\u03b1 level was 860 \u03bcg\/mL, and nitric oxide (NO) level was 19.8 \u03bcg\/mL. However, the treatment with capsaicin reduced their levels (P&lt;0.01) and protein expression of lipopolysaccharide-induced extracellular signal-related kinase 1\/2 and p65 (P&lt;0.05). Overall, capsaicin reduced the secretion of inflammatory cytokines (P&lt;0.01), interleukins, TNF-\u03b1 (P&lt;0.01), and NO by inhibiting the nuclear factor-kappa B and microtubule-associated protein kinase signaling pathways, and thereby reduced lipopolysaccharide-induced inflammatory response in macrophages. <\/jats:p>","DOI":"10.1024\/0300-9831\/a000721","type":"journal-article","created":{"date-parts":[[2021,7,8]],"date-time":"2021-07-08T09:12:17Z","timestamp":1625735537000},"page":"289-297","source":"Crossref","is-referenced-by-count":43,"title":["Capsaicin affects macrophage anti-inflammatory activity via the MAPK and NF-\u03baB signaling pathways"],"prefix":"10.31083","volume":"93","author":[{"given":"Jingshuang","family":"Li","sequence":"first","affiliation":[{"name":"Department of Food Science and Engineering, Jinzhou Medical University, Jinzhou, 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