• Title/Summary/Keyword: inducible nitric oxide synthase

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Ceramide analogs inhibit inducible nitric oxide synthase expression and nitric oxide production in interferon-gamma and lipopolysaccharide-stimulated RAW 264.7 macrophages.

  • Park, Sung-Sik;Kim, Hae-Jong;Yim , Chul-Bu;Kim, Mie-Young;Chun, Young-Jin
    • Proceedings of the PSK Conference
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    • 2002.10a
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    • pp.313.1-313.1
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    • 2002
  • Nitric oxide (NO) production through the inducible nitric-oxide synthase (iNOS) pathway has been implicated in inflammatory diseases and cellular injury. Inhibition of various genes related to inflammation, including iNOS is one of the major roles of well-known anti-inflammatory drugs. In the present study, the effects of ceramide analogs on iNOS expression and NO production were evaluated to investigate how ceramide and its structurally related analogs modulate NO-mecliated cellular signals and inflammation. (omitted)

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The Effects of Diesel Exhaust Particles on the Alveolar Macrophages for Inducible Nitric Oxide Synthase Induction and Nitric Oxide with Nitrotyrosilated-protein Formation (디젤분진이 폐포대식세포에서 nitric oxide의 생성과 inducible nitric oxide synthase의 발현 및 nitrotyrosilated-protein의 형성에 미치는 효과)

  • Lim Young;Choe Myung-Ok;Lee Kweon-Haeng;Kim Kyung-A;Kim Kil-Soo;Lee Myoung-Heon;Li Tian-Zhu;Lee Soo-Jin;Choe Nong-Hoon
    • Journal of Life Science
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    • v.16 no.2 s.75
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    • pp.192-198
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    • 2006
  • Epidemiological studies have demonstrated an association between exposure to diesel exhaust particles (DEP) and adverse cardiopulmonary effects. Despite the epidemiological proof, the pathogenesis of DEP-related pulmonary diseases remain poorly understood. So, comprehensive in vivo and in vitro researches are required to know the effects of DEP on diverse lung diseases. Alveolar macrophages (AM) and airway epithelial cells are known as important cellular targets in DEP-induced lung diseases. Other studies have shown that nitric oxide (NO) is involved in particle matter induced lung injury. The present study was undertaken to determine whether DEP has an synergistic effects on lipopolysaccharide (LPS)-induced NO formation and inducible nitric oxide synthase (iNOS) with nitrotyrosilated-protein formation in cultured primary alveolar macrophages. The formation of NO was determined through the Griess reaction in the cultured medium and iNOS with nitrotyrosilated-proteins are analyzed by immunohistochemical staining and Western analysis. The results indicate that DEP exposure does not induce NO formation by itself, however DEP showed significant synergistic effects on LPS-induced NO formation. So, our results suggest that DEP inhalation could aggravate inflammatory lung disease through NO formation.

Ovalbumin Induces Cyclooxygenase-2 and Inducible Nitric Oxide Synthase Expression (Ovalbumin에 의한 cyclooxygenase-2와 inducible nitric oxide synthase 유도)

  • Lee, A-Neum;Park, Se-Jeong;Jeong, Ae-Ri;Lee, Jae-Ran;Park, Hye-Jeong;Kim, Soo-Jung;Min, In-Soon;Youn, Hyung-Sun
    • Korean Journal of Food Science and Technology
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    • v.43 no.1
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    • pp.110-113
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    • 2011
  • Egg allergies are the most prevalent food hypersensitivity in children. The major egg allergens are proteins, such as ovalbumin (OVA) and ovomucoid (OVM), which are mainly contained in egg whites. OVA is the major protein in egg white, comprising 54% of the total protein content. OVA has been widely used in experimental inhalant and dietary allergy animal models, but its mechanism has not been clearly identified. In this study, we showed that OVA induced nuclear factor-${\kappa}B$ activation. OVA also induced the expression of cyclooxygenase-2 and inducible nitric oxide synthase. These data suggest new approaches for developing efficient anti-allergic strategies.

Effects of Lesser Yang Person-Hyungbangpaedok-san on Lipopolysaccharide-induced Expressions of cyclooxygenase-2 and Inducible Nitric Oxide Synthase in Mouse BV2 Microglial Cells (소양인형방패독산의 생쥐 소교세포에서 지질다당질에 의한 cyclooxygenage-2와 inducible nitric oxide synthase 발현에 미치는 영향)

  • Koh, Ji-Eun;Kim, Jullia;Kim, Hong;Kim, Chang-Ju;Lee, Choong-Yeol
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.21 no.4
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    • pp.961-966
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    • 2007
  • Lesser yang person-Hyungbangpaedok-san (HBPDS) is a prescription originated in the