Nonionic dimer: development and initial testing of an intrathecal contrast agent.

Publisher Website
Google Scholar
Abstract
A nonionic dimer (DL-3-117) containing a novel substituent (D,L amino-threitol) was synthesized and tested as an intrathecal contrast medium. In the complement-mediated assay, the dimer was approximately half as inhibitory of hemolysis as metrizamide or iopamidol. The LD50 in protozoa was 320 mg I/ml for DL-3-117, 96 mg I/ml for metrizamide and 101 mg I/ml for iopamidol. The i.v. LD50 of DL-3-117 in mice was 26 g/kg, and in rats, 12.7 g/kg. The ED50 of intradiencephalic injection in rats was 219 mg I/kg for DL-3-117, 61.9 mg I/kg for metrizamide and 154.1 mg I/kg for iopamidol, which are significantly different. A dose of 300 mg I/kg injected into a permanently cannulated lateral ventricle produced neurofunctional deficits with all contrast media except DL-3-117, which scored equal to Ringer''s solution. Metrizamide and iopamidol in the same model, adapted for aversion conditioning, induced aversion with 45 mg I/kg, while DL-3-117 did not condition the rats.

This publication has 2 references indexed in Scilit: