Identification and characterization of etomidate and metomidate metabolites in zebrafish, HLMs and S9 fraction by quadrupole-orbitrap LC-MS/MS for drug control.

Etomidate is a common non-barbiturate anesthetic with psychoactivity, and metomidate, a structural modifier of etomidate, also has the same psychoactive effect, and the abuse of both has gradually intensified. In this study, etomidate, metomidate and their metabolic profiles with 4 days postfertilization (4dpf) zebrafish, 4 months postfertilization (4mpf) zebrafish, human liver microsomes (HLMs) and human liver S9 fraction were investigated using Liquid chromatography with high resolution mass spectrometry (LC-HRMS) for the first time. 14 etomidate metabolites and 11 metomidate metabolites were found, and the related metabolic pathways included monohydroxylation, dihydroxylation, dehydrogenation, N-dealkylation, O-dealkylation, oxidation, N-glucuronidation, O-glucuronidation and combination.

Double-Modal Locomotion of a Hydrogel Ultra-Soft Magnetic Miniature Robot with Switchable Forms.

Flexible miniature robots are expected to enter difficult-to-reach areas in vivo to carry out targeted operations, attracting widespread attention. However, it is challenging for the existing soft miniature robots to substantially alter their stable shape once the structure is designed. This limitation leads to a fixed motion mode, which subsequently restricts their operating environment.