Evaluating the antifibrotic potency of galunisertib in a human ex vivo model of liver fibrosis

Theerut Luangmonkong, Su Suriguga, Emilia Bigaeva, Miriam Boersema, Dorenda Oosterhuis, Koert P de Jong, Detlef Schuppan, Henricus A M Mutsaers, Peter Olinga*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

33 Citaten (Scopus)

Samenvatting

Background and PurposeLiver fibrosis is a major cause of liver-related mortality and, so far, no effective antifibrotic drug is available. Galunisertib, a TGF- receptor type I kinase inhibitor, is a potential candidate for the treatment of liver fibrosis. Here, we evaluated the potency of galunisertib in a human ex vivo model of liver fibrosis.

Experimental ApproachAntifibrotic potency and associated mechanisms were studied ex vivo, using both healthy and cirrhotic human precision-cut liver slices. Fibrosis-related parameters, both transcriptional and translational level, were assessed after treatment with galunisertib.

Key ResultsGalunisertib showed a prominent antifibrotic potency. Phosphorylation of SMAD2 was inhibited, while that of SMAD1 remained unchanged. In healthy and cirrhotic human livers, spontaneous transcription of numerous genes encoding collagens, including collagen type I, 1, collagen maturation, non-collageneous extracellular matrix (ECM) components, ECM remodelling and selected ECM receptors was significantly decreased. The reduction of fibrosis-related transcription was paralleled by a significant inhibition of procollagen I C-peptide released by both healthy and cirrhotic human liver slices. Moreover, galunisertib showed similar antifibrotic potency in human and rat lives.

Conclusions and ImplicationsGalunisertib is a drug that deserves to be further investigated for the treatment of liver fibrosis. Inhibition of SMAD2 phosphorylation is probably a central mechanism of action. In addition, blocking the production and maturation of collagens and promoting their degradation are related to the antifibrotic action of galunisertib.

Originele taal-2English
Pagina's (van-tot)3107-3117
Aantal pagina's11
TijdschriftBritish Journal of Pharmacology
Volume174
Nummer van het tijdschrift18
Vroegere onlinedatum10-jul-2017
DOI's
StatusPublished - sep-2017

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