SSC-ILD mouse model induced by osmotic minipump delivered bleomycin: effect of Nintedanib

Francesca Ravanetti, Erica Ferrini, Luisa Ragionieri, Zahra Khalajzeyqami, Maria Nicastro, Yanto Ridwan, Alex Kleinjan, Gino Villetti, Andrea Grandi, Franco Fabio Stellari*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
20 Downloads (Pure)

Abstract

Systemic sclerosis (SSc) is an autoimmune disease characterized by an excessive production and accumulation of collagen in the skin and internal organs often associated with interstitial lung disease (ILD). Its pathogenetic mechanisms are unknown and the lack of animal models mimicking the features of the human disease is creating a gap between the selection of anti-fibrotic drug candidates and effective therapies. In this work, we intended to pharmacologically validate a SSc-ILD model based on 1 week infusion of bleomycin (BLM) by osmotic minipumps in C57/BL6 mice, since it will serve as a tool for secondary drug screening. Nintedanib (NINT) has been used as a reference compound to investigate antifibrotic activity either for lung or skin fibrosis. Longitudinal Micro-CT analysis highlighted a significant slowdown in lung fibrosis progression after NINT treatment, which was confirmed by histology. However, no significant effect was observed on lung hydroxyproline content, inflammatory infiltrate and skin lipoatrophy. The modest pharmacological effect reported here could reflect the clinical outcome, highlighting the reliability of this model to better profile potential clinical drug candidates. The integrative approach presented herein, which combines longitudinal assessments with endpoint analyses, could be harnessed in drug discovery to generate more reliable, reproducible and robust readouts.

Original languageEnglish
Article number18513
Number of pages10
JournalScientific Reports
Volume11
Issue number1
DOIs
Publication statusPublished - 16 Sep 2021

Bibliographical note

Funding Information:
The authors declare that this study received funding from Chiesi Farmaceutici S.p.A. The funder was not involved in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Publisher Copyright:
© 2021, The Author(s).

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