Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Ammonium tetrathiomolybdate following ischemia/reperfusion injury: Chemistry, pharmacology, and impact of a new class of sulfide donor in preclinical injury models

Dyson, A, Dal-Pizzol, F, Sabbatini, G, Lach, AB, Galfo, F, dos Santos Cardoso, J, Pescador Mendonça, B, Hargreaves, IP, Bollen Pinto, B, Bromage, DI, Martin, JF, Moore, KP, Feelisch, M and Singer, M (2017) Ammonium tetrathiomolybdate following ischemia/reperfusion injury: Chemistry, pharmacology, and impact of a new class of sulfide donor in preclinical injury models. PLoS Medicine, 14 (7). ISSN 1549-1676

[img]
Preview
Text
Ammonium.pdf - Published Version
Available under License Creative Commons Attribution.

Download (11MB) | Preview

Abstract

Background: Early revascularization of ischemic organs is key to improving outcomes, yet consequent reperfusion injury may be harmful. Reperfusion injury is largely attributed to excess mitochondrial production of reactive oxygen species (ROS). Sulfide inhibits mitochondria and reduces ROS production. Ammonium tetrathiomolybdate (ATTM), a copper chelator, releases sulfide in a controlled and novel manner, and may offer potential therapeutic utility.
Methods and findings: In vitro, ATTM releases sulfide in a time-, pH-, temperature-, and thiol-dependent manner. Controlled sulfide release from ATTM reduces metabolism (measured as oxygen consumption) both in vivo in awake rats and ex vivo in skeletal muscle tissue, with a superior safety profile compared to standard sulfide generators. Given intravenously at reperfusion/resuscitation to rats, ATTM significantly reduced infarct size following either myocardial or cerebral ischemia, and conferred survival benefit following severe hemorrhage. Mechanistic studies (in vitro anoxia/reoxygenation) demonstrated a mitochondrial site of action (decreased MitoSOX fluorescence), where the majority of damaging ROS is produced.
Conclusions: The inorganic thiometallate ATTM represents a new class of sulfide-releasing drugs. Our findings provide impetus for further investigation of this compound as a novel adjunct therapy for reperfusion injury.

Item Type: Article
Additional Information: Dyson A, Dal-Pizzol F, Sabbatini G, Lach AB, Galfo F, dos Santos Cardoso J, et al. (2017) Ammonium tetrathiomolybdate following ischemia/ reperfusion injury: Chemistry, pharmacology, and impact of a new class of sulfide donor in preclinical injury models. PLoS Med 14(7): e1002310. https:// doi.org/10.1371/journal.pmed.1002310
Uncontrolled Keywords: 11 Medical And Health Sciences
Subjects: R Medicine > RM Therapeutics. Pharmacology
Divisions: Pharmacy & Biomolecular Sciences
Publisher: Public Library of Science
Date Deposited: 30 May 2018 10:34
Last Modified: 15 Sep 2018 10:00
DOI or Identification number: 10.1371/journal.pmed.1002310
Editors: Brohi, K
URI: http://researchonline.ljmu.ac.uk/id/eprint/8733

Actions (login required)

View Item View Item