A Lipid Base Formulation for Intramuscular Administration of a Novel Sulfur Donor for Cyanide Antagonism

Title:A Lipid Base Formulation for Intramuscular Administration of a Novel Sulfur Donor for Cyanide Antagonism

Volume: 13 Issue: 8

Author(s): Kristof Kovacs, Prashanth K. Jayanna, Anna Duke, Brittany Winner, Melaeni Negrito, Siva Angalakurthi, Jorn C.C. Yu, Petra Füredi, Krisztina Ludányi, Peter Sipos, Gary A. Rockwood and Ilona Petrikovics

Affiliation:

Keywords: Cyanide antagonism, in vitro/in vivo efficacy, parenteral, PEG-PE micelles, solubility enhancement, sulfur donor.

Abstract: This study represents a new formulation of the novel Cyanide (CN) antidote, Dimethyl trisulfide (DMTS), for intramuscular administration. This is a naturally occurring organosulfur molecule with the capability of reacting with CN more efficiently than the present sulfur donor type CN therapy of Thiosulfate (TS). Two types of micelles (PEG2000-DSPE and PEG2000-DSPE/TPGS) were prepared and tested for their ability to encapsulate the liquid, highly lipophilic and volatile drug, DMTS. The micellar encapsulation for DMTS does not only eliminate the possible muscle necrosis at the injection sites, but the rate of evaporation within the micelles is suppressed, that can provide a level of stability for the formulation. The method of micelle preparation was optimized and it was demonstrated that the PEG2000-DSPE preparation can dissolve up to 2.0 mg/ml of the antidote candidate. Keeping the injection volume minimized this could provide a maximum DMTS dose of 12.5 mg/kg. However, even this low dose of DMTS showed a remarkable in vivo therapeutic efficacy (2 X LD50 protection) in a mice model when injected intramuscularly. These in vitro and in vivo findings proved the efficacy of DMTS in combating CN intoxication, and the presented work gives valuable insight to micelle preparation and sets the bases for a more advanced future formulation of DMTS.

Cite this article as:

Kovacs Kristof, Jayanna K. Prashanth, Duke Anna, Winner Brittany, Negrito Melaeni, Angalakurthi Siva, Yu C.C. Jorn, Füredi Petra, Ludányi Krisztina, Sipos Peter, Rockwood A. Gary and Petrikovics Ilona, A Lipid Base Formulation for Intramuscular Administration of a Novel Sulfur Donor for Cyanide Antagonism, Current Drug Delivery 2016; 13 (8) . https://dx.doi.org/10.2174/1567201813666160321115851