Major depressive disorder, depression Mental and Behavioural Disorders
Conditions
Interventions
Single dose of GM-2505 or placebo
Sponsors
Gilgamesh Pharmaceuticals
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Healthy female or male subjects, aged 18 to 55 years old, inclusive. Healthy status is defined by absence of evidence of any active or chronic disease following a detailed medical, surgical a complete physical examination including vital signs, 12-lead ECG, hematology, blood chemistry, and urinalysis. If the results of the serum chemistry panel, hematology, or urinalysis are outside the normal reference ranges, the subject may be included only if the investigator judges the abnormalities to be not clinically significant. 2. Subject has a body mass index (BMI) between 18.0 and 30.0 kg/m2 inclusive (BMI=weight/height2) at screening. 3. Self-report of at least one prior hallucinogen drug experience that included a meaningful altered state of consciousness (a state in which the subject experienced phenomena that altered his psychological functioning, such as loss of ego boundaries, impaired control of actions and cognition, disembodiment, changed meaning of perception, visual alterations, and audio–visual synesthesia) in the past 5 years. Hallucinogenic substances can include psilocybin, LSD, DMT, ayahuasca, mescaline, ibogaine, 2C-drugs (such as 2CB, 2CI and 2CE) and/or ketamine. 4. Subjects must be willing to adhere to the prohibitions and restrictions specified in the protocol, including attending all study visits, preparatory and follow-up sessions, and completing all study evaluations. 5. Each subject must sign an informed consent form (ICF) indicating that he or she understands the purpose and procedures required for the study and are willing to participate in the study. Agree to refrain from using any psychoactive drugs from 30 days before first dosing and until the last follow-up visit and to refrain from using alcoholic beverages within 48 hours prior to admission of each treatment period.
Exclusion criteria
Exclusion criteria: 1. Clinically significant current or previous liver or renal insufficiency, cardiac, vascular, pulmonary, gastrointestinal, endocrine, neurologic, hematologic, rheumatologic, metabolic or inflammatory illness, or any other illness that would compromise the well-being of the subject or the study or prevent the subject from meeting or performing study requirements according to the investigator. 3. Subject has a history of or current hypertension (resting systolic blood pressure > 130 mmHg or diastolic blood pressure >90 mmHg) at screening. 5. Resting heart rate (HR) greater than 100 or less than 45 beats per minute (bpm) at screening. 7. Clinically significant personal or familial history of epilepsy, seizures, convulsions, or other seizure disorder(excluding febrile seizures as a child), previous head trauma or other risk factor for seizure. 8. Clinically significant current or previous psychiatric disorder according to DSM 5. Specifically, current or previous psychotic disorders and bipolar disorder will be excluded. 9. Family history of a psychotic disorder (whether in the context of bipolar disorder, schizophrenia or schizoaffective disorder) in first-degree and second-degree relatives. 10. Clinically significant current or previous suicidality based on the C-SSRS and psychiatric history indicating current suicidal ideation or a history of active suicidal ideation or suicide attempts 11. Subject has a current or history of drug or alcohol use disorder according to the to DSM-IV and/or DSM 5within the past 12 months. 12. Use of psychoactive substances (including ketamine, esketamine, MDMA, cannabinoids), during the 6 weeks prior to screening. Single/occasional use may be allowed at the discretion of investigator. 13. Ingestion of psychedelics (including psilocybin, DMT/ayahuasca, LSD, another serotonergic psychedelic)during 4 weeks prior to screening. 14. Persistent psychological effects following the previous use of psilocybin, LSD, DMT, ayahuasca, mescaline, ibogaine, 2C-drugs (such as 2CB, 2CI and 2CE) and/or ketamine. Such effects might include but are not limited to anxiety, depressed mood, paranoid ideation and/or hallucinations (including hallucinogen persisting perception disorder – HPPD) or recurrent flashbacks related to use. 15. Subject has a positive test result(s) for alcohol and/or drugs of abuse (including opiates (including methadone),cocaine, amphetamines, methamphetamines, cannabinoids, barbiturates, and benzodiazepines) at screening or admission to the clinical unit.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Safety and tolerability outcomes after single intravenous (IV) doses of GM-2505 measured pre-dose and several times post-dose up to 24h post-dose: 1. Adverse events measured using clinical logs monitored continuously from signing ICF to the last follow-up 2. Hematology measured using a standard laboratory clinical safety panel upon admission to the clinical unit, before discharge, and during the follow-up visit 3. Serum chemistry measured using a standard laboratory clinical safety panel upon admission to the clinical unit, before discharge, and during the follow-up visit 4. Urinalysis measured using a standard laboratory clinical safety panel upon admission to the clinical unit, before discharge, and during the follow-up visit 5. Vital signs measured using pulse and blood pressure taken after 5 minutes in the supine position at screening, upon admission, 5' pre-dose, and 5', 40', 1h, 2h, 4h, 8h, 24h post-dose. Automated oscillometric blood pressures were used. 6. 12-lead ECG measured using standard ECG procedures obtained during the study with a Marquette 2000/5500 and stored using the MUSE Cardiology Information System. ECGs were taken after at least 5 minutes in the supine position at screening, upon admission, 5' pre-dose, and 5', 40', 1h, 2h, 4h, 8h, and 24h post-dose. 7. Occurrence of psychotic symptoms measured using the Brief Psychiatric Rating Scale (BPRS) at screening, upon admission to the clinical unit, 2, 6, and 24h post-dose, and during the follow-up visit 8. Occurrence of suicidal thoughts and ideations measured using the Columbia–Suicide Severity Rating Scale (C-SSRS) at screening, upon admission to the clinical unit, and 24h post-dose, and during the follow-up visit 9. Occurrence of central serotonergic toxicity measured using Hunter’s Serotonin Toxicity Criteria (HSTC) only in the suspected cases of serotonergic toxicity signs throughout the study 10. Safety-EEG measured using continuous recording standard procedures with continuous recording 4 m | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. To assess the the pharmacokinetics (PK) of GM-2505, AUCinf, AUCinf(%extrap), AUClast, CL, Cmax, t1/2, tmax, Vss, Vz, CLR, Aelast, Aelast% will be measured in plasma and urine, pre-dose and several times post dose, up to 24h. 15' pre-dose, and 10', 20', 40', 1h, 1h 30', 2h, 3h, 4h, 6h, 12h, 24h post-dose. 2. To characterize the pharmacodynamics (PD) of GM-2505: 2.1. The NeuroCart test battery on Day 1 pre-dose and 40', 2h, 6h, 24h post-dose 2.2. Clinical rating scales: 2.2.1. Real Time Intensity on Day 1, 15' pre-dose, and 10', 20', 40', 1h, 1h 30', 2h, 3h, 4h, 6h, 12h, 24h post-dose 2.2.2. VAS Bond & Lader, VAS Bowdle, Drug effects Questionnaire on Day 1, pre-dose, and 20', 40', 1h, 2h, 3h, 4h, 5h, 8h post-dose 2.2.3. 5 Dimension Altered States of Consciousness rating scale (5DASC), Mystical Effects Questionnaire (MEQ-30): ~ 4 h post-dose 2.2.4. Pharmaco-EEG, resting state: pre-dose, 30 min, 1h, 1.5h, 3h, 6h, and 25h post-dose 2.3. Computerized tests: 2.3.1. N-Back task, Sustained Attention to Response Task, Probabilistic learning task, a reinforcement learning and working memory task, and an effort cost-benefit task at baseline, 6h post-dose, and 24h post-dose | — |
Countries
Netherlands
Contacts
Public ContactSoma Makai-Bölöni
Outcome results
None listed