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Title

A study on OPG/RANK/RANKL axis in osteoporotic bile duct-ligated rats and the involvement of nitrergic and opioidergic systems

Pages

  239-249

Abstract

 Chronic liver disease (CLD) affects millions of people and its impact on Bone loss has become a subject of interest. Nitric oxide and endogenous opioids are suggested to increase during cholestasis/Cirrhosis and may impact bone resorption by different mechanisms. The receptor activator of nuclear factor-κ B (RANK)/RANK-ligand (RANKL)/osteoprotegerin (OPG) signaling pathway regulates bone resorption, but its role in metabolic bone disease subsequent to CLD is unknown. We aimed to investigate the involvement of nitrergic and Opioidergic systems in Bone loss relative to the RANK/RANKL/OPG pathway, in bile ductligated (BDL) rats. Eighty BDL/sham-operated (SO) rats received injections of 3 mg/kg/day Nω-Nitro-Larginine methyl ester ± naltrexone (10 mg/kg/day) or saline for 28 days. Plasma bone turnover markers, OPG, RANK, and RANKL along with mRNA expression levels of the latter three were assessed. Plasma bone turnover markers and OPG level increased, but RANKL decreased in the BDL group compared with their SO controls (both: P ≤ 0. 05). Administration of naltrexone reduced bone turnover markers and OPG level while increased RANKL content in comparison to BDL rats (P ≤ 0. 05). As compared to untreated BDL rats, nitric oxide inhibition showed no effect on bone turnover marker i. e. OPG, RANK, and RANKL levels. BDL significantly increased RANK mRNA, but had no significant effect on RANKL and OPG mRNA expression. The lack of association between plasma levels and quantitative gene expression of RANKL and OPG suggests an indirect function of these markers in BDL rats. Considering that opioid receptor blockage by naltrexone in BDL animals caused a significant decrease in OPG and an increase in RANKL plasma contents, it could be postulated that the Opioidergic system may have a regulatory effect on these bone markers.

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    APA: Copy

    Doustimotlagh, Amir Hossein, DEHPOUR, AHMAD REZA, ETEMAD MOGHADAM, SHAHROO, ALAEDDINI, MOJGAN, OSTADHADI, SATTAR, & GOLESTANI, ABOLFAZL. (2018). A study on OPG/RANK/RANKL axis in osteoporotic bile duct-ligated rats and the involvement of nitrergic and opioidergic systems. RESEARCH IN PHARMACEUTICAL SCIENCES (RPS), 13(3), 239-249. SID. https://sid.ir/paper/739010/en

    Vancouver: Copy

    Doustimotlagh Amir Hossein, DEHPOUR AHMAD REZA, ETEMAD MOGHADAM SHAHROO, ALAEDDINI MOJGAN, OSTADHADI SATTAR, GOLESTANI ABOLFAZL. A study on OPG/RANK/RANKL axis in osteoporotic bile duct-ligated rats and the involvement of nitrergic and opioidergic systems. RESEARCH IN PHARMACEUTICAL SCIENCES (RPS)[Internet]. 2018;13(3):239-249. Available from: https://sid.ir/paper/739010/en

    IEEE: Copy

    Amir Hossein Doustimotlagh, AHMAD REZA DEHPOUR, SHAHROO ETEMAD MOGHADAM, MOJGAN ALAEDDINI, SATTAR OSTADHADI, and ABOLFAZL GOLESTANI, “A study on OPG/RANK/RANKL axis in osteoporotic bile duct-ligated rats and the involvement of nitrergic and opioidergic systems,” RESEARCH IN PHARMACEUTICAL SCIENCES (RPS), vol. 13, no. 3, pp. 239–249, 2018, [Online]. Available: https://sid.ir/paper/739010/en

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