Tags

Type your tag names separated by a space and hit enter

The role of Rho-associated kinase in differential regulation by statins of interleukin-1beta- and lipopolysaccharide-mediated nuclear factor kappaB activation and inducible nitric-oxide synthase gene expression in vascular smooth muscle cells.

Abstract

An optimal level of NO has protective effects in atherosclerosis, whereas large amounts contribute to septic shock. To study how statins, the potent inhibitors of cholesterol synthesis, regulate NO in the vascular wall, we determined their effects on interleukin-1beta (IL-1beta)- and lipopolysaccharide (LPS)-induced NO production in aortic vascular smooth muscle cells (VSMCs). Compared with the large amounts of NO and inducible NO synthase (iNOS) protein expression induced by LPS, the responses of IL-1beta were modest. Various statins were found to inhibit LPS-induced iNOS expression and NO production, although they potentiated IL-1beta responses. In addition, fluvastatin increased IL-1beta-induced p65 nuclear translocation and nuclear factor kappaB (NF-kappaB) activity, although it inhibited those induced by LPS. To address the role of small G proteins in statin's actions, farnesyl transferase inhibitors [alpha-hydroxyfarne-sylphosphonic acid and (2S)-2-[[(2S)-2-[(2S,3S)-2-[(2R)-2-amino-3-mercaptopropyl]amino]-3-methylpentyl]oxy]-1-oxo-3-phenylpropyl]amino]-4-(methylsulfonyl)-butanoic acid 1-methylethyl ester (L-744382)], Rac inhibitor (NSC23766), and Rho-associated kinase (ROCK) inhibitor [N-(4-pyridyl)-4-(1-aminoethyl)cyclohexanecarboxamide dihydrochloride (Y-27632)] were used. We found that Y-27632 potentiated IL-1beta-induced iNOS expression, p65 nuclear translocation, IkappaB kinase (IKK), and NF-kappaB activation, whereas it had minimal effects on LPS-induced responses. In contrast, farnesyl transferase inhibitors blocked iNOS protein expression induced by LPS and IL-1beta, whereas NSC23766 had no effect. Further studies showed that LPS down-regulated Rho and ROCK activity, whereas IL-1beta increased them, suggesting a negative role of Rho and ROCK signaling, which is regulated in contrary manners by IL-1beta and LPS, in IKK/NF-kappaB activation. Through abrogating this negative signaling, statins differentially regulate iNOS expression induced by LPS and IL-1beta in VSMCs. These differential actions of statins on iNOS gene regulation might provide an additional explanation for the pleiotropic beneficial effects of statins.

Links

  • FREE Publisher Full Text
  • Authors+Show Affiliations

    ,

    Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan.

    , , , ,

    Source

    Molecular pharmacology 69:3 2006 Mar pg 960-7

    MeSH

    Amides
    Animals
    Aorta
    Enzyme Inhibitors
    Gene Expression
    Hydroxymethylglutaryl-CoA Reductase Inhibitors
    Interleukin-1
    Intracellular Signaling Peptides and Proteins
    Lipopolysaccharides
    Male
    Monomeric GTP-Binding Proteins
    Muscle Cells
    Muscle, Smooth, Vascular
    NF-kappa B
    Nitric Oxide
    Nitric Oxide Synthase Type II
    Protein-Serine-Threonine Kinases
    Pyridines
    Rats
    Rats, Sprague-Dawley
    rho-Associated Kinases

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    16317111

    Citation

    Wei, Chun-Yu, et al. "The Role of Rho-associated Kinase in Differential Regulation By Statins of Interleukin-1beta- and Lipopolysaccharide-mediated Nuclear Factor kappaB Activation and Inducible Nitric-oxide Synthase Gene Expression in Vascular Smooth Muscle Cells." Molecular Pharmacology, vol. 69, no. 3, 2006, pp. 960-7.
    Wei CY, Huang KC, Chou YH, et al. The role of Rho-associated kinase in differential regulation by statins of interleukin-1beta- and lipopolysaccharide-mediated nuclear factor kappaB activation and inducible nitric-oxide synthase gene expression in vascular smooth muscle cells. Mol Pharmacol. 2006;69(3):960-7.
    Wei, C. Y., Huang, K. C., Chou, Y. H., Hsieh, P. F., Lin, K. H., & Lin, W. W. (2006). The role of Rho-associated kinase in differential regulation by statins of interleukin-1beta- and lipopolysaccharide-mediated nuclear factor kappaB activation and inducible nitric-oxide synthase gene expression in vascular smooth muscle cells. Molecular Pharmacology, 69(3), pp. 960-7.
    Wei CY, et al. The Role of Rho-associated Kinase in Differential Regulation By Statins of Interleukin-1beta- and Lipopolysaccharide-mediated Nuclear Factor kappaB Activation and Inducible Nitric-oxide Synthase Gene Expression in Vascular Smooth Muscle Cells. Mol Pharmacol. 2006;69(3):960-7. PubMed PMID: 16317111.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - The role of Rho-associated kinase in differential regulation by statins of interleukin-1beta- and lipopolysaccharide-mediated nuclear factor kappaB activation and inducible nitric-oxide synthase gene expression in vascular smooth muscle cells. AU - Wei,Chun-Yu, AU - Huang,Kuo-Chin, AU - Chou,Yin-Hsiang, AU - Hsieh,Pe-Fang, AU - Lin,Kuei-Hui, AU - Lin,Wan-Wan, Y1 - 2005/11/29/ PY - 2005/12/1/pubmed PY - 2006/4/20/medline PY - 2005/12/1/entrez SP - 960 EP - 7 JF - Molecular pharmacology JO - Mol. Pharmacol. VL - 69 IS - 3 N2 - An optimal level of NO has protective effects in atherosclerosis, whereas large amounts contribute to septic shock. To study how statins, the potent inhibitors of cholesterol synthesis, regulate NO in the vascular wall, we determined their effects on interleukin-1beta (IL-1beta)- and lipopolysaccharide (LPS)-induced NO production in aortic vascular smooth muscle cells (VSMCs). Compared with the large amounts of NO and inducible NO synthase (iNOS) protein expression induced by LPS, the responses of IL-1beta were modest. Various statins were found to inhibit LPS-induced iNOS expression and NO production, although they potentiated IL-1beta responses. In addition, fluvastatin increased IL-1beta-induced p65 nuclear translocation and nuclear factor kappaB (NF-kappaB) activity, although it inhibited those induced by LPS. To address the role of small G proteins in statin's actions, farnesyl transferase inhibitors [alpha-hydroxyfarne-sylphosphonic acid and (2S)-2-[[(2S)-2-[(2S,3S)-2-[(2R)-2-amino-3-mercaptopropyl]amino]-3-methylpentyl]oxy]-1-oxo-3-phenylpropyl]amino]-4-(methylsulfonyl)-butanoic acid 1-methylethyl ester (L-744382)], Rac inhibitor (NSC23766), and Rho-associated kinase (ROCK) inhibitor [N-(4-pyridyl)-4-(1-aminoethyl)cyclohexanecarboxamide dihydrochloride (Y-27632)] were used. We found that Y-27632 potentiated IL-1beta-induced iNOS expression, p65 nuclear translocation, IkappaB kinase (IKK), and NF-kappaB activation, whereas it had minimal effects on LPS-induced responses. In contrast, farnesyl transferase inhibitors blocked iNOS protein expression induced by LPS and IL-1beta, whereas NSC23766 had no effect. Further studies showed that LPS down-regulated Rho and ROCK activity, whereas IL-1beta increased them, suggesting a negative role of Rho and ROCK signaling, which is regulated in contrary manners by IL-1beta and LPS, in IKK/NF-kappaB activation. Through abrogating this negative signaling, statins differentially regulate iNOS expression induced by LPS and IL-1beta in VSMCs. These differential actions of statins on iNOS gene regulation might provide an additional explanation for the pleiotropic beneficial effects of statins. SN - 0026-895X UR - https://www.unboundmedicine.com/medline/citation/16317111/The_role_of_Rho_associated_kinase_in_differential_regulation_by_statins_of_interleukin_1beta__and_lipopolysaccharide_mediated_nuclear_factor_kappaB_activation_and_inducible_nitric_oxide_synthase_gene_expression_in_vascular_smooth_muscle_cells_ L2 - http://molpharm.aspetjournals.org/cgi/pmidlookup?view=long&pmid=16317111 DB - PRIME DP - Unbound Medicine ER -