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2017-10-31

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cc-by (c) Panisell et al., 2017
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/117629

The relevance of the UPS in the fatty liver graft preservation: a new approach for IGL-1 and HTK solutions

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https://doi.org/10.3390/ijms18112287

Abstract

The 26S proteasome is the central proteolytic machinery of the ubiquitin proteasome system (UPS), which is involved in the degradation of ubiquitinated protein substrates. Recently, UPS inhibition has been shown to be a key factor in fatty liver graft preservation during organ cold storage using University of Wisconsin solution (UW) and Institute Georges Lopez (IGL-1) solutions. However, the merits of IGL-1 and histidine-tryptophan-ketoglutarate (HTK) solutions for fatty liver preservation have not been compared. Fatty liver grafts from obese Zücker rats were preserved for 24 h at 4 °C. Aspartate aminotransferase and alanine aminotransferase (AST/ALT), glutamate dehydrogenase (GLDH), ATP, adenosine monophosphate protein kinase (AMPK), e-NOS, proteasome activity and liver polyubiquitinated proteins were determined. IGL-1 solution prevented ATP breakdown during cold-storage preservation of steatotic livers to a greater extent than HTK solution. There were concomitant increases in AMPK activation, e-NOS (endothelial NOS (NO synthase)) expression and UPS inhibition. UPS activity is closely related to the composition of the solution used to preserve the organ. IGL-1 solution provided significantly better protection against ischemia-reperfusion for cold-stored fatty liver grafts than HTK solution. The effect is exerted through the activation of the protective AMPK signaling pathway, an increase in e-NOS expression and a dysregulation of the UPS.

Subject

Isquèmia, Ubiqüitina, Malalties del fetge, Proteïnes

Subject (English)

Ischemia, Ubiquitin, Liver diseases, Proteins

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Articles publicats en revistes (Biologia Cel·lular, Fisiologia i Immunologia)

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PANISELLO ROSELLÓ, Arnau, et al. The relevance of the UPS in the fatty liver graft preservation: a new approach for IGL-1 and HTK solutions. International Journal of Molecular Sciences. 2017. Vol. 18, num. 11, pags. E2287. ISSN 1661-6596. [consulted: 15 of August of 2026]. Available at: https://hdl.handle.net/2445/117629

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