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Chow LN, Schreiner P, Ng BYY, Lo B, Hughes MR, Scott RW, Gusti V, Lecour S, Simonson E, Manisali I, Barta I, McNagny KM, Crawford J, Webb M, Underhill TM. Impact of a CXCL12/CXCR4 Antagonist in Bleomycin (BLM) Induced Pulmonary Fibrosis and Carbon Tetrachloride (CCl4) Induced Hepatic Fibrosis in Mice. PLoS One 2016; 11:e0151765. [PMID: 26998906 PMCID: PMC4801399 DOI: 10.1371/journal.pone.0151765] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 03/03/2016] [Indexed: 12/22/2022] Open
Abstract
Modulation of chemokine CXCL12 and its receptor CXCR4 has been implicated in attenuation of bleomycin (BLM)-induced pulmonary fibrosis and carbon tetrachloride (CCl4)-induced hepatic injury. In pulmonary fibrosis, published reports suggest that collagen production in the injured lung is derived from fibrocytes recruited from the circulation in response to release of pulmonary CXCL12. Conversely, in hepatic fibrosis, resident hepatic stellate cells (HSC), the key cell type in progression of fibrosis, upregulate CXCR4 expression in response to activation. Further, CXCL12 induces HSC proliferation and subsequent production of collagen I. In the current study, we evaluated AMD070, an orally bioavailable inhibitor of CXCL12/CXCR4 in alleviating BLM-induced pulmonary and CCl4-induced hepatic fibrosis in mice. Similar to other CXCR4 antagonists, treatment with AMD070 significantly increased leukocyte mobilization. However, in these two models of fibrosis, AMD070 had a negligible impact on extracellular matrix deposition. Interestingly, our results indicated that CXCL12/CXCR4 signaling has a role in improving mortality associated with BLM induced pulmonary injury, likely through dampening an early inflammatory response and/or vascular leakage. Together, these findings indicate that the CXCL12-CXCR4 signaling axis is not an effective target for reducing fibrosis.
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Affiliation(s)
- Leola N. Chow
- The Centre for Drug Research and Development, Vancouver, British Columbia, Canada
- * E-mail: (LNC); (TMU)
| | - Petra Schreiner
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Betina Y. Y. Ng
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Bernard Lo
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Michael R. Hughes
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - R. Wilder Scott
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Vionarica Gusti
- The Centre for Drug Research and Development, Vancouver, British Columbia, Canada
| | - Samantha Lecour
- The Centre for Drug Research and Development, Vancouver, British Columbia, Canada
| | - Eric Simonson
- The Centre for Drug Research and Development, Vancouver, British Columbia, Canada
| | - Irina Manisali
- The Centre for Drug Research and Development, Vancouver, British Columbia, Canada
| | - Ingrid Barta
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kelly M. McNagny
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jason Crawford
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Murray Webb
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - T. Michael Underhill
- The Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
- * E-mail: (LNC); (TMU)
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