A single injection of lysergic acid diethylamide (LSD) temporarily breaks apart polysomes, the clusters of ribosomes that assemble proteins, in the brains of young rabbits. The effect peaks 30 to 60 minutes after administration and fades within four hours. Both low (10 μg/kg) and high (100 μg/kg) doses cause this disruption. The breakdown is not due to RNA-degrading enzymes, and it coincides with a measurable drop in protein production.
Serotonin levels significantly influence the effects of lysergic acid diethylamide (LSD), with a study revealing that 75% of participants reported enhanced emotional experiences. In an analysis involving 200 individuals, genetic variations affecting serotonin receptors were linked to differing responses to this psychotropic drug. The research also highlighted how LSD impacts muscle metabolism and nutrition by modulating heat shock proteins, which play a role in protein biosynthesis. These findings deepen our understanding of the complex interplay between neuroscience, pharmacology, and biochemistry in drug responses.
Two and a half hours after rabbits received LSD intravenously, their isolated brain nuclei showed increased RNA synthesis. Transcription rose by 54% in brain stem nuclei and by 13% in cerebral hemisphere nuclei compared to saline controls. Both nucleoplasmic and nucleolar RNA synthesis were elevated. The primary activity in the assay came from nucleoplasmic RNA polymerase, as alpha-amanitin reduced synthesis by over 70% in both drug and control groups.