title: The 'mauve factor' of schizophrenia and porphyria, 5-hydroxyhaemopyrrole lactam, has low pharmacological potency on guinea-pig ileum.
abstract: 5-Hydroxyhaemopyrrole lactam, the 'mauve factor' reported in the urine of schizophrenics and porphyrics was found to inhibit electrically-stimulated contractions of guinea-pig ileum only at high concentrations (ID50 = 8.5 mM). This low potency makes it unlikely that the compound can account for neurotoxic effects in human porphyria.
mesh_terms: D000818:Animals; D004305:Dose-Response Relationship, Drug; D004558:Electric Stimulation; D006168:Guinea Pigs; D006801:Humans; D007082:Ileum / Q000187:drug effects / Q000502:physiology*; D009119:Muscle Contraction / Q000187:drug effects*; D011164:Porphyrias / Q000652:urine*; D011758:Pyrroles / Q000494:pharmacology* / Q000652:urine; D051381:Rats; D012559:Schizophrenia / Q000652:urine*
chemical_list: D011758:Pyrroles