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Sklepkiewicz P, Dymek BA, Mlacki M, Koralewski R, Mazur M, Nejman-Gryz P, Korur S, Zagozdzon A, Rymaszewska A, von der Thüsen JH, Siwińska AM, Güner NC, Cheda Ł, Paplinska-Goryca M, Proboszcz M, van den Bosch TPP, Górska K, Golab J, Kamiński RM, Krenke R, Golebiowski A, Dzwonek K, Dobrzanski P. Inhibition of CHIT1 as a novel therapeutic approach in idiopathic pulmonary fibrosis. Eur J Pharmacol 2022; 919:174792. [PMID: 35122869 DOI: 10.1016/j.ejphar.2022.174792] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 01/25/2022] [Accepted: 01/26/2022] [Indexed: 12/13/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive and eventually fatal lung disease with a complex etiology. Approved drugs, nintedanib and pirfenidone, modify disease progression, but IPF remains incurable and there is an urgent need for new therapies. We identified chitotriosidase (CHIT1) as new driver of fibrosis in IPF and a novel therapeutic target. We demonstrate that CHIT1 activity and expression are significantly increased in serum (3-fold) and induced sputum (4-fold) from IPF patients. In the lungs CHIT1 is expressed in a distinct subpopulation of profibrotic, disease-specific macrophages, which are only present in patients with ILDs and CHIT1 is one of the defining markers of this fibrosis-associated gene cluster. To define CHIT1 role in fibrosis, we used the therapeutic protocol of the bleomycin-induced pulmonary fibrosis mouse model. We demonstrate that in the context of chitinase induction and the macrophage-specific expression of CHIT1, this model recapitulates lung fibrosis in ILDs. Genetic inactivation of Chit1 attenuated bleomycin-induced fibrosis (decreasing the Ashcroft scoring by 28%) and decreased expression of profibrotic factors in lung tissues. Pharmacological inhibition of chitinases by OATD-01 reduced fibrosis and soluble collagen concentration. OATD-01 exhibited anti-fibrotic activity comparable to pirfenidone resulting in the reduction of the Ashcroft score by 32% and 31%, respectively. These studies provide a preclinical proof-of-concept for the antifibrotic effects of OATD-01 and establish CHIT1 as a potential new therapeutic target for IPF.
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Affiliation(s)
| | - Barbara A Dymek
- OncoArendi Therapeutics SA, 02-089, Warsaw, Poland; Postgraduate School of Molecular Medicine, Medical University of Warsaw, 02-097, Warsaw, Poland.
| | | | | | | | - Patrycja Nejman-Gryz
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, 02-097, Warsaw, Poland
| | - Serdar Korur
- OncoArendi Therapeutics SA, 02-089, Warsaw, Poland
| | | | | | - Jan H von der Thüsen
- Department of Pathology, Erasmus Medical Center, 3015 GD, Rotterdam, the Netherlands
| | | | | | - Łukasz Cheda
- OncoArendi Therapeutics SA, 02-089, Warsaw, Poland
| | - Magdalena Paplinska-Goryca
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, 02-097, Warsaw, Poland
| | - Małgorzata Proboszcz
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, 02-097, Warsaw, Poland
| | | | - Katarzyna Górska
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, 02-097, Warsaw, Poland
| | - Jakub Golab
- Department of Immunology, Medical University of Warsaw, 02-097, Warsaw, Poland
| | | | - Rafał Krenke
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, 02-097, Warsaw, Poland
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