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Tucker TR, Knitter CA, Khoury DM, Eshghi S, Tran S, Sharrock AV, Wiles TJ, Ackerley DF, Mumm JS, Parsons MJ. An inducible model of chronic hyperglycemia. Dis Model Mech 2023; 16:dmm050215. [PMID: 37401381 PMCID: PMC10417516 DOI: 10.1242/dmm.050215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 06/28/2023] [Indexed: 07/05/2023] Open
Abstract
Transgene driven expression of Escherichia coli nitroreductase (NTR1.0) renders animal cells susceptible to the antibiotic metronidazole (MTZ). Many NTR1.0/MTZ ablation tools have been reported in zebrafish, which have significantly impacted regeneration studies. However, NTR1.0-based tools are not appropriate for modeling chronic cell loss as prolonged application of the required MTZ dose (10 mM) is deleterious to zebrafish health. We established that this dose corresponds to the median lethal dose (LD50) of MTZ in larval and adult zebrafish and that it induced intestinal pathology. NTR2.0 is a more active nitroreductase engineered from Vibrio vulnificus NfsB that requires substantially less MTZ to induce cell ablation. Here, we report on the generation of two new NTR2.0-based zebrafish lines in which acute β-cell ablation can be achieved without MTZ-associated intestinal pathology. For the first time, we were able to sustain β-cell loss and maintain elevated glucose levels (chronic hyperglycemia) in larvae and adults. Adult fish showed significant weight loss, consistent with the induction of a diabetic state, indicating that this paradigm will allow the modeling of diabetes and associated pathologies.
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Affiliation(s)
- Tori R. Tucker
- Department of Developmental and Cell Biology, University of California, Irvine, Natural Sciences II, Irvine, CA 92697, USA
| | - Courtney A. Knitter
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Natural Sciences II, Irvine, CA 92697, USA
| | - Deena M. Khoury
- Department of Developmental and Cell Biology, University of California, Irvine, Natural Sciences II, Irvine, CA 92697, USA
| | - Sheida Eshghi
- Department of Developmental and Cell Biology, University of California, Irvine, Natural Sciences II, Irvine, CA 92697, USA
| | - Sophia Tran
- Department of Developmental and Cell Biology, University of California, Irvine, Natural Sciences II, Irvine, CA 92697, USA
| | - Abigail V. Sharrock
- School of Biological Sciences, Victoria University of Wellington, Wellington 6012, New Zealand
| | - Travis J. Wiles
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Natural Sciences II, Irvine, CA 92697, USA
| | - David F. Ackerley
- School of Biological Sciences, Victoria University of Wellington, Wellington 6012, New Zealand
| | - Jeff S. Mumm
- Department of Ophthalmology, The Wilmer Eye Institute, Johns Hopkins University, Baltimore, MD, USA
| | - Michael J. Parsons
- Department of Developmental and Cell Biology, University of California, Irvine, Natural Sciences II, Irvine, CA 92697, USA
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