Change in expression of the guanosine triphosphate cyclohydrolase I in LPS-stimulated rats is tissue specific

Yu Chun Hung, Pei-Shan Tsai, Chun Jen Huang, Stone Yang, Jeffrey W. Skimming, Min Chi Hsieh

研究成果: 雜誌貢獻文章

2 引文 (Scopus)

摘要

Background: The synthesis of tetrahydrobiopterin (BH4), a necessary cofactor for inducible nitric oxide synthase (iNOS), has been reported to be controlled by guanosine triphosphate cyclohydrolase I (GTPCH). Previous studies have demonstrated that GTPCH was induced by bacterial toxin. However, in a study using lipopolysaccharide (LPS)-treated murine macrophages model, we found that GTPCH expression was in fact constitutive rather than inducible. To further elucidate the effects of endotoxemia on GTPCH expression, we therefore preformed this LPS-treated rodent endotoxemia study with special focus on lung, liver, and kidney. Methods: Rats randomly received either normal saline (N/S) or LPS injection. At five different time points (0, 1, 2, 3 and 4 h after LPS injection in LPS group and comparable time points in N/S group), four rats from each group were sacrificed. Snap frozen tissues were then analyzed using semi-quantitative RT-PCR to determine GTPCH mRNA concentrations. Results: GTPCH mRNA concentrations in lung and liver tissues were similar between groups. On the other hand, GTPCH mRNA concentrations in renal tissues were significantly higher in the LPS group as compared with the N/S group. Our data demonstrated that GTPCH expression in lung and liver tissues was constitutive rather than inducible, whereas renal GTPCH expression was induced by LPS in a time-dependent manner. Conclusions: GTPCH expression is tissue specific. Different tissues react differently to endotoxemia in terms of GTPCH expression. Therefore, efforts aiming at modulating GTPCH expression to limit NO overproduction should adjust accordingly.
原文英語
頁(從 - 到)23-31
頁數9
期刊Acta Anaesthesiologica Taiwanica
42
發行號1
出版狀態已發佈 - 三月 2004

指紋

Guanosine Triphosphate
Lipopolysaccharides
Endotoxemia
Kidney
Lung
Messenger RNA
Liver
Bacterial Toxins
Injections
Nitric Oxide Synthase Type II
Rodentia
Macrophages
Polymerase Chain Reaction

ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine

引用此文

Change in expression of the guanosine triphosphate cyclohydrolase I in LPS-stimulated rats is tissue specific. / Hung, Yu Chun; Tsai, Pei-Shan; Huang, Chun Jen; Yang, Stone; Skimming, Jeffrey W.; Hsieh, Min Chi.

於: Acta Anaesthesiologica Taiwanica, 卷 42, 編號 1, 03.2004, p. 23-31.

研究成果: 雜誌貢獻文章

Hung, Yu Chun ; Tsai, Pei-Shan ; Huang, Chun Jen ; Yang, Stone ; Skimming, Jeffrey W. ; Hsieh, Min Chi. / Change in expression of the guanosine triphosphate cyclohydrolase I in LPS-stimulated rats is tissue specific. 於: Acta Anaesthesiologica Taiwanica. 2004 ; 卷 42, 編號 1. 頁 23-31.
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abstract = "Background: The synthesis of tetrahydrobiopterin (BH4), a necessary cofactor for inducible nitric oxide synthase (iNOS), has been reported to be controlled by guanosine triphosphate cyclohydrolase I (GTPCH). Previous studies have demonstrated that GTPCH was induced by bacterial toxin. However, in a study using lipopolysaccharide (LPS)-treated murine macrophages model, we found that GTPCH expression was in fact constitutive rather than inducible. To further elucidate the effects of endotoxemia on GTPCH expression, we therefore preformed this LPS-treated rodent endotoxemia study with special focus on lung, liver, and kidney. Methods: Rats randomly received either normal saline (N/S) or LPS injection. At five different time points (0, 1, 2, 3 and 4 h after LPS injection in LPS group and comparable time points in N/S group), four rats from each group were sacrificed. Snap frozen tissues were then analyzed using semi-quantitative RT-PCR to determine GTPCH mRNA concentrations. Results: GTPCH mRNA concentrations in lung and liver tissues were similar between groups. On the other hand, GTPCH mRNA concentrations in renal tissues were significantly higher in the LPS group as compared with the N/S group. Our data demonstrated that GTPCH expression in lung and liver tissues was constitutive rather than inducible, whereas renal GTPCH expression was induced by LPS in a time-dependent manner. Conclusions: GTPCH expression is tissue specific. Different tissues react differently to endotoxemia in terms of GTPCH expression. Therefore, efforts aiming at modulating GTPCH expression to limit NO overproduction should adjust accordingly.",
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AU - Tsai, Pei-Shan

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AU - Skimming, Jeffrey W.

AU - Hsieh, Min Chi

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N2 - Background: The synthesis of tetrahydrobiopterin (BH4), a necessary cofactor for inducible nitric oxide synthase (iNOS), has been reported to be controlled by guanosine triphosphate cyclohydrolase I (GTPCH). Previous studies have demonstrated that GTPCH was induced by bacterial toxin. However, in a study using lipopolysaccharide (LPS)-treated murine macrophages model, we found that GTPCH expression was in fact constitutive rather than inducible. To further elucidate the effects of endotoxemia on GTPCH expression, we therefore preformed this LPS-treated rodent endotoxemia study with special focus on lung, liver, and kidney. Methods: Rats randomly received either normal saline (N/S) or LPS injection. At five different time points (0, 1, 2, 3 and 4 h after LPS injection in LPS group and comparable time points in N/S group), four rats from each group were sacrificed. Snap frozen tissues were then analyzed using semi-quantitative RT-PCR to determine GTPCH mRNA concentrations. Results: GTPCH mRNA concentrations in lung and liver tissues were similar between groups. On the other hand, GTPCH mRNA concentrations in renal tissues were significantly higher in the LPS group as compared with the N/S group. Our data demonstrated that GTPCH expression in lung and liver tissues was constitutive rather than inducible, whereas renal GTPCH expression was induced by LPS in a time-dependent manner. Conclusions: GTPCH expression is tissue specific. Different tissues react differently to endotoxemia in terms of GTPCH expression. Therefore, efforts aiming at modulating GTPCH expression to limit NO overproduction should adjust accordingly.

AB - Background: The synthesis of tetrahydrobiopterin (BH4), a necessary cofactor for inducible nitric oxide synthase (iNOS), has been reported to be controlled by guanosine triphosphate cyclohydrolase I (GTPCH). Previous studies have demonstrated that GTPCH was induced by bacterial toxin. However, in a study using lipopolysaccharide (LPS)-treated murine macrophages model, we found that GTPCH expression was in fact constitutive rather than inducible. To further elucidate the effects of endotoxemia on GTPCH expression, we therefore preformed this LPS-treated rodent endotoxemia study with special focus on lung, liver, and kidney. Methods: Rats randomly received either normal saline (N/S) or LPS injection. At five different time points (0, 1, 2, 3 and 4 h after LPS injection in LPS group and comparable time points in N/S group), four rats from each group were sacrificed. Snap frozen tissues were then analyzed using semi-quantitative RT-PCR to determine GTPCH mRNA concentrations. Results: GTPCH mRNA concentrations in lung and liver tissues were similar between groups. On the other hand, GTPCH mRNA concentrations in renal tissues were significantly higher in the LPS group as compared with the N/S group. Our data demonstrated that GTPCH expression in lung and liver tissues was constitutive rather than inducible, whereas renal GTPCH expression was induced by LPS in a time-dependent manner. Conclusions: GTPCH expression is tissue specific. Different tissues react differently to endotoxemia in terms of GTPCH expression. Therefore, efforts aiming at modulating GTPCH expression to limit NO overproduction should adjust accordingly.

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