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The anti-inflammatory effect of montelukast, a cysteinyl leukotriene receptor-1 antagonist, against estradiol-induced nonbacterial inflammation in the rat prostate

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Abstract

There is no standard treatment of chronic nonbacterial prostatitis in humans. The current study was aimed to investigate the effect of montelukast, an antagonist of cysteinyl leukotriene receptor-1, against estrogen-induced, nonbacterial lateral lobe-specific prostate inflammation in rats. Male Wistar rats were randomized into five groups of six rats, including sham controls (group 1) and castrated rats (group 2), whereas nonbacterial prostatitis (NBP) was induced in groups 3–5 by castration followed by a daily subcutaneous injection of estradiol (0.25 mg/kg body weight) for 30 days. The rats were left otherwise untreated (group 3) or received a daily oral administration of montelukast (1 and 10 mg/kg body weight for groups 4 and 5, respectively) from the 17th day after castration for two consecutive weeks. Compared with sham controls, induction of NBP led to a significant increase in serum leukotriene B4 (LTB4), tumor necrosis factor alpha (TNF-α), and interleukin 6 (IL-6) levels, along with a significant upregulation in the transcript level of proinflammatory molecules (nuclear factor kappa beta [NF-κβ] and inducible nitric oxide synthase [iNOS]), chemokines (monocyte chemoattractant protein-1 [MCP-1] and eotaxin), and E-selectin in the lateral prostate. Histological examination revealed intense inflammation in the prostate with leukocyte infiltration and acinar degeneration following estradiol treatment of castrated rats. Montelukast significantly suppressed the increase in serum and prostate proinflammatory mediators/chemokines expression and abolished the histologically inflammatory changes in the lateral prostate. These findings indicate that montelukast inhibits estradiol-induced NBP in a rat model through anti-inflammatory mechanisms, suggesting its future beneficial effect for the treatment of clinical chronic NBP.

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Authors and Affiliations

  1. Department of Biochemistry, Faculty of Science, Ain Shams University, Cairo, Egypt

    Mahmoud M. Said

  2. Department of Pathology, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA

    Maarten C. Bosland

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  1. Mahmoud M. Said
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  2. Maarten C. Bosland
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Correspondence to Mahmoud M. Said.

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The animals were maintained in accordance with the Guide for the Care and Use of Laboratory Animals (National Research Council 2011), and all animal experiments were performed under protocols approved by the Local Institutional Animal Ethics Committee at Ain Shams University.

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The authors declare that they have no conflicts of interest.

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Said, M.M., Bosland, M.C. The anti-inflammatory effect of montelukast, a cysteinyl leukotriene receptor-1 antagonist, against estradiol-induced nonbacterial inflammation in the rat prostate. Naunyn-Schmiedeberg's Arch Pharmacol 390, 197–205 (2017). https://doi.org/10.1007/s00210-016-1325-4

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  • DOI: https://doi.org/10.1007/s00210-016-1325-4

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