title: Introducing Euro-Glo, a rare earth metal chelate with numerous applications for the fluorescent localization of myelin and amyloid plaques in brain tissue sections.
abstract: The vast majority of fluorochromes are organic in nature and none of the few existing chelates have been applied as histological tracers for localizing brain anatomy and pathology.
  
  
  
  In this study we have developed and characterized a Europium chelate with the ability to fluorescently label normal and pathological myelin in control and toxicant-exposed rats, as well as the amyloid plaques in aged AD/Tg mice.
  
  
  
  This study demonstrates how Euro-Glo can be used for the detailed labeling of both normal myelination in the control rat as well as myelin pathology in the kainic acid exposed rat. In addition, this study demonstrates how E-G will label the shell of amyloid plaques in an AD/Tg mouse model of Alzheimer's disease a red color, while the plaque core appears blue in color. The observed E-G staining pattern is compared with that of well characterized tracers specific for the localization of myelin (Black-Gold II), degenerating neurons (Fluoro-Jade C), A-beta aggregates (Amylo-Glo) and glycolipids (PAS).
  
  
  
  This study represents the first time a rare earth metal (REM) chelate has been used as a histochemical tracer in the brain. This novel tracer, Euro-Glo (E-G), exhibits numerous advantages over conventional organic fluorophores including high intensity emission, high resistance to fading, compatibility with multiple labeling protocols, high Stoke's shift value and an absence of bleed-through of the signal through other filters.
  
  
  
  Euro-Glo represents the first fluorescent metal chelate to be used as a histochemical tracer, specifically to localize normal and pathological myelin as well as amyloid plaques.
authors.affiliation: National Center for Toxicological Research, Food and Drug Administration, 3900 NCTR Rd Jefferson AR, 72079, United States. Electronic address: larry.schmued@fda.hhs.gov.
authors.forename: Larry
authors.initials: L
authors.lastname: Schmued
authors.affiliation: National Center for Toxicological Research, Food and Drug Administration, 3900 NCTR Rd Jefferson AR, 72079, United States. Electronic address: james.raymick@fda.hhs.gov.
authors.forename: James
authors.initials: J
authors.lastname: Raymick
mesh_terms: D000544:Alzheimer Disease / Q000473:pathology; D000818:Animals; D001921:Brain / Q000166:cytology* / Q000473:pathology; D002614:Chelating Agents; D056831:Coordination Complexes; D004195:Disease Models, Animal; D005452:Fluoresceins; D005456:Fluorescent Dyes; D007608:Kainic Acid / Q000633:toxicity; D008822:Mice, Transgenic; D009186:Myelin Sheath / Q000473:pathology*; D010618:Phenanthrolines; D010710:Phosphates; D058225:Plaque, Amyloid / Q000473:pathology*; D017207:Rats, Sprague-Dawley; D013194:Staining and Labeling
chemical_list: C121848:Black-Gold; D002614:Chelating Agents; D056831:Coordination Complexes; C000624692:Euro-Glo; D005452:Fluoresceins; D005456:Fluorescent Dyes; D010618:Phenanthrolines; D010710:Phosphates; C534582:fluoro-jade C; D007608:Kainic Acid
keywords: Amyloid plaques; Brain pathology; Euro-Glo; Europium chelate; Fluorescent tracer; Myelin