• Arch Med Sci · Jan 2023

    Amarogentin promotes osteoblast differentiation in oestrogen-deficiency-induced osteoporosis rats by modulating the Nrf-2/MAPK/ERK signalling pathway.

    • Sirui Li, Xianlong Li, Feng He, Rui Jiao, Song Zhang, and Zhihua Li.
    • The Second Clinical Medical College of Dalian Medical University, Dalian, China.
    • Arch Med Sci. 2023 Jan 1; 19 (2): 452457452-457.

    IntroductionThe beneficial effect of amarogentin in the management of osteoporosis was determined using in vivo and in vitro methods.Material And MethodsExperimental osteoporosis was induced in rats via bilateral ovariectomy. Rats were then treated for 5 weeks with amarogentin (50 and 100 mg/kg, p.o.). The levels of several biochemical markers of bone resorption and formation as well as bone mineral density (BMD) were measured in the rat serum. Isolated rat bone tissues were analysed using western blot assays. In the in vitro study, MG63 human osteoblasts were treated with amarogentin (0-100 μg/ml), after which alkaline phosphatase activity and osteoblast proliferation were evaluated. Osteoblasts treated with amarogentin and inhibitors of extracellular signal-regulated kinase (ERK) were further examined via western blotting.ResultsIn the rat model of oestrogen-deficiency-induced osteoporosis, BMD was significantly enhanced (p < 0.01) and levels of inflammatory cytokines were reduced in amarogentin-treated animals vs. the controls. Amarogentin treatment also attenuated the altered levels of osteocalcin, C-telopeptide of type 1 collagen, procollagen type I N-terminal propeptide, and bone-specific alkaline phosphatase, and the altered expression of Akt, Nrf-2, ERK, and nuclear factor-κB p65 in the serum of rats with osteoporosis. In the in vitro study, amarogentin treatment enhanced alkaline phosphatase activity and osteoblast proliferation compared to the non-treated control. Amarogentin treatment alone enhanced the expression of p-ERK compared to treatment with an amarogentin + ERK inhibitor.ConclusionsBoth the in vivo and the in vitro studies demonstrated the protective effect of amarogentin against oestrogen-deficiency-induced osteoporosis in rats. The mechanism seems to involve the amarogentin-mediated enhancement of osteoblast differentiation via the Nrf-2/MAPK/ERK signalling pathway.Copyright: © 2019 Termedia & Banach.

      Pubmed     Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…