title: Effects on in vitro brain protein synthesis of a translational inhibitor isolated from rabbit brain following intravenous administration of LSD.
abstract: Inhibition of brain protein synthesis following intravenous administration of d-lysergic acid diethylamide (LSD) is accompanied by generation of a translational inhibitor protein in the postribosomal supernatant of cerebral hemispheres. Addition of an enriched preparation of this factor to a brain cell-free translation system resulted in a selective reduction in the level of phosphorylation of proteins of molecular weight 55K, 41K, and 25K. A similar set of changes was also observed in a brain cell-free system prepared 1 hr subsequent to drug injection. The brain inhibitor reduced the translational capacity of a messenger RNA-dependent reticulocyte lysate programmed with brain polysomes isolated from saline-injected animals however little effect was apparent when polysomes were prepared from LSD-treated animals. The translational inhibitor did not affect the spectrum of translation products from either set of polysomes.
mesh_terms: D000818:Animals; D002474:Cell-Free System; D003864:Depression, Chemical; D008238:Lysergic Acid Diethylamide / Q000494:pharmacology*; D009419:Nerve Tissue Proteins / Q000096:biosynthesis* / Q000302:isolation & purification / Q000494:pharmacology; D010766:Phosphorylation; D011132:Polyribosomes / Q000378:metabolism; D014176:Protein Biosynthesis / Q000187:drug effects*; D011817:Rabbits; D013687:Telencephalon / Q000187:drug effects* / Q000378:metabolism
chemical_list: D009419:Nerve Tissue Proteins; D008238:Lysergic Acid Diethylamide