Neurotropic Effect of Extracts from the Hallucinogenic Mushroom Psilocybe cubensis (Earle) Sing. (Agaricomycetideae). In Vitro Studies
M. G. Moldavan, Elvira F. Solomko, Anna A. Grodzínskaya, V. М. Storozhuk, Margarita Lomberg
International journal of medicinal mushrooms 2000 DOI: 10.1615/intjmedmushr.v2.i4.130 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Experimental study Peer reviewed |
|---|---|
| Sample size | 50 |
| Population | Rat hippocampal CA1 pyramidal neurons |
| Topics | Psilocybin |
| Keywords | Hippocampal formation Pharmacology Hallucinogen |
| Citations | 3 |
| Key findings | Psilocybe cubensis extracts inhibit spike activity in rat hippocampal CA1 pyramidal neurons and block excitation caused by L-glutamic acid, with inhibition partly mediated by 5-HT2/5-HT1C serotonin receptors. |
Abstract
The neurotropic effect of Psilocybe cubensis (Earle) Sing, dried biomass and fruiting bodies containing the indole hallucinogens psilocybin and psilocine on spike activity of pyramidal neurons from the rat hippocampal CAl region slices has been studied. Extracellularly responses of 50 neurons were recorded, 34 during the application of biomass extract (BME) and 16 during the application of fruiting body extract (FBE). Of the total number of cells studied, the inhibition resulting from BME and FBE application was observed in 73.5% and 81% of cells, respectively. Inhibition parameters during the BME and FBE application were (in seconds) as follows: latency 59 ± 7 and 67 ± 8 and duration 251 ± 26 and 273 ± 37, respectively. Only 5.9% of neurons showed excitation resulting from BME application and no excitative response was observed during FBE application. During the BME and FBE application a short burst occurred in 29% and 12.5% of neurons, respectively. Ritancerin (antagonist of 5-HT2/5-HT1C serotonin receptors) blocked inhibitory responses resulting from BME and FBE application in half of the units tested. The duration of response to serotonin could reach 10−43 min whereas the response to extract application usually did not exceed 4−5 min. Extract application inhibited excitation spike responses resulting from L-glutamic acid application. Results that have been obtained show that the application of psilocybin-containing extracts from mushroom fruiting bodies and biomass causes a similar inhibition pattern of spike activity in pyramidal neurons from the hippocampal CA1 region and inhibits excitation of these neurons caused by L-glutamic acid.
Comparable studies
Other experimental studies on psilocybin, most cited first.
| Study | Year | Design | Participants |
|---|---|---|---|
| Psilocybin induces schizophrenia-like psychosis in humans via a serotonin-2 agonist action Healthy human volunteers | 1998 | Experimental study | |
| Validation of the revised Mystical Experience Questionnaire in experimental sessions with psilocybin Participants in controlled laboratory experiments receiving a moderate to high oral... | 2015 | Validation study using pooled data from five laboratory experiments | n = 184 |
| Broadband Cortical Desynchronization Underlies the Human Psychedelic State Healthy human participants | 2013 | Experimental study | |
| Long-term follow-up of psilocybin-assisted psychotherapy for psychiatric and existential distress in patients with life-threatening cancer Participants with cancer-related psychiatric distress who completed a parent randomized... | 2020 | Long-term within-subjects follow-up analysis | n = 15 |
| Enzymatic Synthesis of Psilocybin | 2017 | Laboratory study |
Citations in the library
Cited by 2
- Psilocybin reduces functional correlation and the encoding of spatial information by neurons in mouse retrosplenial cortex European Journal of Neuroscience October 4, 2024
- Psilocybin reduces functional connectivity and the encoding of spatial information by neurons in mouse retrosplenial cortex April 22, 2024