• Naunyn Schmiedebergs Arch. Pharmacol. · Aug 2012

    (-)-Epigallocatechin-3-gallate (EGCG) attenuates functional deficits and morphological alterations by diminishing apoptotic gene overexpression in skeletal muscles after sciatic nerve crush injury.

    • Waleed M Renno, May Al-Maghrebi, and Anwar Al-Banaw.
    • Department of Anatomy, Faculty of Medicine, Kuwait University, PO Box 24923, Safat 13110, Kuwait. wrenno@hsc.edu.kw
    • Naunyn Schmiedebergs Arch. Pharmacol. 2012 Aug 1; 385 (8): 807-22.

    AbstractMuscle degeneration and impairment following nerve injury could lead to apoptosis as a result of increased levels of reactive oxygen species. This activates the apoptotic cascade through mitochondrial dysfunction and damage to lipids, proteins, and DNA. In considering of the multifactorial protective properties of green tea polyphenols (-)-epigallocatechin-3-gallate (EGCG), this study investigates whether EGCG treatment does improve skeletal muscle function impairments, induced by crushing of the sciatic nerve. Compared to the saline-treated injured group of animals, EGCG treatment of axonotomized animals showed significant motor enhancement in the toe spread and foot positioning analysis and gain in the percentage motor deficit. The proprioceptive function expressed by the hopping response showed significant progression in the EGCG-treated group. Recovery of sensory innervation was followed by a slowly retreating neuropathic pain-like syndrome in the EGCG-treated animals. Muscle tissues from injured limb showed severe histopathological alterations that were significantly attenuated by EGCG treatment at the end of week 3 post-surgery. Semi-quantitative desmin immunohistochemistry revealed intense staining in the saline-treated injured animals, whereas EGCG treatment decreased the desmin immunoreactivity back to sham control levels. Using RT-PCR, EGCG treatment induced a significant anti-apoptotic effect in injured muscle tissues by normalizing the Bax/Bcl-2 ratio back to baseline levels and inhibiting overexpression of the p53 apoptotic gene at days 3 and 7 post-surgery. In conclusion, our results demonstrate that EGCG enhances functional recovery, protects muscle fibers from cellular death by activating anti-apoptotic signaling pathway, and improves morphological recovery in skeletal muscle after nerve injuries.

      Pubmed     Full text   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…