Cyrene is a green alternative to DMSO as a solvent for antibacterial drug discovery against ESKAPE pathogens

Jason E. Camp, Simbarashe B. Nyamini, Fraser J. Scott

Research output: Contribution to journalArticle

Abstract

Dimethyl sulfoxide (DMSO) is currently employed across the biomedical field, from cryopreservation to in vitro assays, despite the fact that it has been shown to have an assortment of biologically relevant effects. The amphiphilic nature of DMSO along with its relatively low toxicity at dilute concentrations make it a challenging solvent to replace. A possible alternative is Cyrene™ (dihydrolevoglucosenone), an aprotic dipolar solvent that is derived from waste biomass. In addition to being a green solvent, Cyrene™ has comparable solvation properties and is reported to have low toxicity. Herein the abilities of the two solvents to solubilize drug compounds and to act as non-participatory vehicles in drug discovery for antibacterials are compared. It was demonstrate that the results of standardised antimicrobial susceptibility testing do not differ between drugs prepared from either Cyrene™ or DMSO stock. Moreover, in contrast to DMSO, Cyrene™ does not offer protection from ROS mediated killing of bacteria and may therefore be an improvement over DMSO as a vehicle in antimicrobial drug discovery.
LanguageEnglish
Number of pages9
JournalRSC Medicinal Chemistry
Publication statusAccepted/In press - 24 Aug 2019

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Pathogens
Dimethyl Sulfoxide
Toxicity
Solvation
Pharmaceutical Preparations
Assays
Bacteria
Biomass
Drug Discovery
Testing

Keywords

  • cyrene
  • antibacterial drug discovery
  • solvents

Cite this

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Cyrene is a green alternative to DMSO as a solvent for antibacterial drug discovery against ESKAPE pathogens. / Camp, Jason E.; Nyamini, Simbarashe B.; Scott, Fraser J.

24.08.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Cyrene is a green alternative to DMSO as a solvent for antibacterial drug discovery against ESKAPE pathogens

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AU - Nyamini, Simbarashe B.

AU - Scott, Fraser J.

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N2 - Dimethyl sulfoxide (DMSO) is currently employed across the biomedical field, from cryopreservation to in vitro assays, despite the fact that it has been shown to have an assortment of biologically relevant effects. The amphiphilic nature of DMSO along with its relatively low toxicity at dilute concentrations make it a challenging solvent to replace. A possible alternative is Cyrene™ (dihydrolevoglucosenone), an aprotic dipolar solvent that is derived from waste biomass. In addition to being a green solvent, Cyrene™ has comparable solvation properties and is reported to have low toxicity. Herein the abilities of the two solvents to solubilize drug compounds and to act as non-participatory vehicles in drug discovery for antibacterials are compared. It was demonstrate that the results of standardised antimicrobial susceptibility testing do not differ between drugs prepared from either Cyrene™ or DMSO stock. Moreover, in contrast to DMSO, Cyrene™ does not offer protection from ROS mediated killing of bacteria and may therefore be an improvement over DMSO as a vehicle in antimicrobial drug discovery.

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