• Title/Summary/Keyword: pharmacological therapy

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Attenuation of Lipopolysaccharide-induced Inflammatory and Oxidative Response by 5-Aminolevulinic Acid Phosphate in RAW 264.7 Macrophages (RAW 264.7 대식세포에서 lipopolysaccharide 자극에 의한 염증성 및 산화적 스트레스에 미치는 5-aminolevulinic acid phosphate의 영향)

  • Ji, Seon Yeong;Kim, Min Yeong;Hwangbo, Hyun;Lee, Hyesook;Hong, Su Hyun;Cha, Hee-Jae;Kim, Heui-Soo;Kim, Suhkmann;Choi, Yung Hyun
    • Journal of Life Science
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    • v.31 no.9
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    • pp.818-826
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    • 2021
  • 5-Aminolevulinic acid phosphate (5-ALA-p) is a substance obtained by eluting 5-ALA (a natural delta amino acid) with aqueous ammonia, adding phosphoric acid to the eluate, and then adding acetone to confer properties suitable for use in photodynamic therapy applications. However, its pharmacological efficacy, including potential mechanisms of antioxidant and anti-inflammatory reactions, remains unclear. This study aimed to investigate the effects of 5-ALA-p on oxidative and inflammatory stresses in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. Our data showed that 5-ALA-p significantly inhibited excessive phagocytic activity via LPS and attenuated oxidative stress in LPS-treated RAW 264.7 cells. Furthermore, 5-ALA-p improved mitochondrial biogenesis reduced by LPS, suggesting that 5-ALA-p restores mitochondrial damage caused by LPS. Additionally, 5-ALA-p significantly suppressed the release of nitric oxide (NO) and pro-inflammatory cytokines, such as tumor necrosis factor α (TNF-α), interleukin (IL)-1β, and IL-6, which are associated with the inhibition of inducible NO synthase and respective cytokine expression. Furthermore, 5-ALA-p reduced the nuclear translocation of nuclear factor-kappa B (NF-κB) and inhibited phosphorylation of mitogen-activated protein kinases (MAPKs), indicating that the anti-inflammatory effect of 5-ALA-p is mediated through the suppression of NF-κB and MAPK signaling pathways. Based on these results, 5-ALA-p may serve as a potential candidate to reduce inflammation and oxidative stress.