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- Title
Neuroprotective effects of ammonium tetrathiomolybdate, a slow-release sulfide donor, in a rodent model of regional stroke.
- Authors
Mendonça, Bruna Pescador; Cardoso, Juliano Dos Santos; Michels, Monique; Vieira, Ana Carolina; Wendhausen, Diogo; Manfredini, Andressa; Singer, Mervyn; Dal-Pizzol, Felipe; Dyson, Alex
- Abstract
Background: Several therapeutic strategies to rescue the brain from ischemic injury have improved outcomes after stroke; however, there is no treatment as yet for reperfusion injury, the secondary damage caused by necessary revascularization. Recently we characterized ammonium tetrathiomolybdate (ATTM), a drug used as a copper chelator over many decades in humans, as a new class of sulfide donor that shows efficacy in preclinical injury models. We hypothesized that ATTM could confer neuroprotection in a relevant rodent model of regional stroke. Methods and results: Brain ischemia was induced by transient (90-min) middle cerebral artery occlusion (tMCAO) in anesthetized Wistar rats. To mimic a clinical scenario, ATTM (or saline) was administered intravenously just prior to reperfusion. At 24 h or 7 days post-reperfusion, rats were assessed using functional (rotarod test, spontaneous locomotor activity), histological (infarct size), and molecular (anti-oxidant enzyme capacity, oxidative damage, and inflammation) outcome measurements. ATTM-treated animals showed improved functional activity at both 24 h and 7-days post-reperfusion, in parallel with a significant reduction in infarct size. These effects were additionally associated with increased brain antioxidant enzyme capacity, decreased oxidative damage, and a late (7-day) effect on pro-inflammatory cytokine levels and nitric oxide products. Conclusion: ATTM confers significant neuroprotection that, along with its known safety profile in humans, provides encouragement for its development as a novel adjunct therapy for revascularization following stroke.
- Subjects
CEREBRAL ischemia; STROKE; RODENTS; REPERFUSION injury; ANIMAL models in research
- Publication
Intensive Care Medicine Experimental, 2020, Vol 8, Issue 1, p1
- ISSN
2197-425X
- Publication type
Article
- DOI
10.1186/s40635-020-00300-8