title: Mouse strain and source of L-tryptophan affects hepatic nuclear tryptophan binding.
abstract: This study describes that the affinity for specific L-tryptophan binding to hepatic nuclei in vitro is markedly decreased in NZBWF1 mice in comparison to that in Swiss mice. Also, the hepatic nuclei of NZBWF1 mice have a significantly decreased binding response in vitro to Showa Denko L-tryptophan (implicated in the eosinophilia-myalgia syndrome) or to its contaminants, 1,1'-ethylidenebis(tryptophan) or 3-phenylamino-L-alanine, when each is added to control, non-implicated L-tryptophan compared with hepatic nuclei of Swiss mice. Enhanced hepatic protein synthesis induced by tube-feeding control L-tryptophan is much less in NZBWF1 mice than in Swiss mice. Tube-feeding of Showa Denko L-tryptophan induced less stimulation of hepatic protein synthesis than did control L-tryptophan in Swiss mice but essentially none in NZBWF1 mice. NZBWF1 mice have a genetically altered response to L-tryptophan which may prove to be useful is studying the role of L-tryptophan in health and in disease.
authors.affiliation: Department of Pathology, George Washington University Medical Center, Washington, DC 20037, USA.
authors.forename: H
authors.initials: H
authors.lastname: Sidransky
authors.forename: E
authors.initials: E
authors.lastname: Verney
mesh_terms: D000409:Alanine / Q000031:analogs & derivatives / Q000494:pharmacology; D000818:Animals; D001667:Binding, Competitive; D002467:Cell Nucleus / Q000378:metabolism; D008099:Liver / Q000378:metabolism* / Q000648:ultrastructure; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008811:Mice, Inbred DBA; D008814:Mice, Inbred NZB; D014176:Protein Biosynthesis; D064586:Selenic Acid; D018036:Selenium Compounds / Q000494:pharmacology; D018038:Sodium Selenite / Q000494:pharmacology; D014364:Tryptophan / Q000031:analogs & derivatives / Q000737:chemistry / Q000378:metabolism*
chemical_list: D018036:Selenium Compounds; C070372:1,1'-ethylidene bis(tryptophan); C078798:3-(phenylamino)alanine; D014364:Tryptophan; D018038:Sodium Selenite; D064586:Selenic Acid; D000409:Alanine