Next tier in vitro and in vivo nonclinical studies further elucidating the safety and toxicity profile of MB-102, a novel fluorescent tracer agent for measurement of glomerular filtration rate

Publication date: Available online 2 July 2019Source: Regulatory Toxicology and PharmacologyAuthor(s): Richard B. Dorshow, Joseph E. BugajAbstractMB-102 was designed for measurement of real-time glomerular filtration rate (GFR). Previously reported in vitro and in vivo nonclinical studies clearly demonstrated negligible toxicity, resulting in FDA clearance for First-in Human, proof of concept clinical studies. The next tier of safety and toxicity studies are reported herein.MB-102 did not demonstrate any phototoxic potential in a BALB/c 3T3 mouse fibroblast study. Co-administration of MB-102 and iohexol resulted in pharmacokinetic parameters virtually identical to the values observed upon individual administration in beagle dogs. A single dose of MB-102 administered either intravenously (18.6 mg/mL) or perivenously (0.25 mL) was well-tolerated in NZ white rabbits, with no adverse inflammation or irritation. MB-102 did not induce micronuclei in polychromatic erythrocytes for rat bone marrow cells treated up to 450 mg/kg/day, the maximum feasible dose. Two separate optical imaging studies demonstrated that MB-102 distributes rapidly and thoroughly throughout the test subjects, followed by rapid clearance from the body without any preferential localization in any particular tissue or organ, with the exception of the bladder, which is totally consistent with a known GFR agent. In addition, two-week repeat intravenous (once-daily) toxicity and toxicokinetic studies were cond...
Source: Regulatory Toxicology and Pharmacology - Category: Toxicology Source Type: research