Projects per year
Abstract
Being goalkeepers of liver homeostasis, gap junctions are also involved in hepatotoxicity. However, their role in this process is ambiguous, as gap junctions can act as both targets and effectors of liver toxicity. This particularly holds true for drug-induced liver insults. In the present study, the involvement of connexin 26, connexin32 and connexin43, the building blocks of liver gap junctions, was investigated in acetaminophen-induced hepatotoxicity.
Methods
C57BL/6 mice were overdosed with 300 mg/kg body weight acetaminophen followed by analysis of the expression and localization of connexins as well as monitoring of hepatic gap junction functionality. Furthermore, acetaminophen-induced liver injury was compared between mice genetically deficient in connexin43 and wild type littermates. Evaluation of the toxicological response was based on a set of clinically relevant parameters, including protein adduct formation, measurement of alanine aminotransferase activity, cytokines and glutathione.
Results
It was found that gap junction communication deteriorates upon acetaminophen intoxication in wild type mice, which is associated with a switch in mRNA and protein production from connexin32 and connexin26 to connexin43. The upregulation of connexin43 expression is due, at least in part, to de novo production by hepatocytes. Connexin43-deficient animals tended to show increased liver cell death, inflammation and oxidative stress in comparison with wild type counterparts.
Conclusion
These results suggest that hepatic connexin43-based signaling may protect against acetaminophen-induced liver toxicity.
Original language | English |
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Pages (from-to) | 1111-1121 |
Number of pages | 11 |
Journal | Biochimica et Biophysica Acta - Molecular Basis of Disease |
Volume | 1862 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Jun 2016 |
Keywords
- connexin
- acetaminophen
- hepatotoxicity
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OZR2651: International Joint Research Group - Liver Connexin and Pannexin Research Group (LCPR)
Vinken, M., Rogiers, V., Cogliati, B. & Dagli, M. L.
1/08/14 → 1/07/26
Project: Fundamental
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OZR2813: Bilaterale samenwerking ikv gemeenschappelijke doctoraatsproject: Bench Fee voor Joint PhD VUB-Universidade de Sao Paulo, Michael Maes
10/06/15 → 31/07/17
Project: Fundamental
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EU457: CONNECT: Connexin and pannexin channels as drug targets and biomarkers in acute and chronic liver disease
1/03/14 → 28/02/19
Project: Fundamental
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Connexins and pannexins in liver damage
Crespo Yanguas, S., Willebrords, J., Maes, M., da Silva, T. C., Alves Pereira, I. V., Cogliati, B., Zaidan Dagli, M. L. & Vinken, M., 18 Feb 2016, In: EXCLI Journal. 15, p. 177-186 10 p.Research output: Contribution to journal › Article › peer-review
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Experimental models of hepatotoxicity related to acute liver failure
Maes, M., Vinken, M. & Jaeschke, H., 1 Jan 2016, In: Toxicology and Applied Pharmacology. 290, p. 86-97 12 p.Research output: Contribution to journal › Article › peer-review
File162 Citations (Scopus)283 Downloads (Pure) -
Connexin and pannexin signaling in gastrointestinal and liver disease
Maes, M., Crespo Yanguas, S., Willebrords, J., Cogliati, B. & Vinken, M., 1 Oct 2015, In: Translational Research. 166, 4, p. 332-343Research output: Contribution to journal › Article › peer-review
41 Citations (Scopus)
Prizes
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Protective effects of connexin43 signaling against experimentally induced acute liver failure in mouse.
Maes, M. (Recipient), 28 Mar 2015
Prize: Prize (including medals and awards)