Bile acids have been implicated in cholestatic liver damage, primarily due to their detergent effect on membranes and induction of oxidative stress. Gangliosides can counteract these harmful effects by increasing the rigidity of the cytoplasmic membrane. Induction of haem oxygenase (HMOX) has been shown to protect the liver from increased oxidative stress. The aim of this study was to determine the changes in the synthesis and distribution of liver gangliosides following bile duct ligation (BDL), and to assess the effects of HMOX both on cholestatic liver injury and ganglioside metabolism. Compared to controls, BDL resulted in a significant increase in total as well as complex gangliosides and mRNA expression of corresponding glycosyltransferases ST3GalV, ST8SiaI and B3GalTIV. A marked shift of GM1 ganglioside from the intracellular compartment to the cytoplasmic membrane was observed following BDL. Induction of oxidative stress by HMOX inhibition resulted in a further increase of these changes, while HMOX induction prevented this effect. Compared to BDL alone, HMOX inhibition in combination with BDL significantly increased the amount of bile infarcts, while HMOX activation decreased ductular proliferation. We have demonstrated that cholestasis is accompanied by significant changes in the distribution and synthesis of liver gangliosides. HMOX induction results in attenuation of the cholestatic pattern of liver gangliosides, while HMOX inhibition leads to the opposite effect.

• MeSH
• biologické markery metabolismus   MeSH
• cholestáza enzymologie   genetika   metabolismus   patologie   MeSH
• cytoplazma metabolismus   MeSH
• gangliosidy metabolismus   MeSH
• hemová oxygenasa (decyklizující) metabolismus   MeSH
• intracelulární membrány metabolismus   MeSH
• játra enzymologie   metabolismus   patologie   MeSH
• kyselina N-acetylneuraminová metabolismus   MeSH
• ligace MeSH
• messenger RNA genetika   metabolismus   MeSH
• oxidační stres * MeSH
• potkani Wistar MeSH
• proliferace buněk MeSH
• tělesná hmotnost MeSH
• velikost orgánu MeSH
• žlučové cesty patologie   MeSH
• zvířata MeSH
• Check Tag
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH