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Glutamate Reducing Interventions in Schizophrenia

NCT03321617 — Phase 1, Completed, 16 participants, New York State Psychiatric Institute

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RegistryNCT03321617
StatusCompleted
PhasePhase 1
Study typeInterventional; randomized, parallel, masking: triple, treatment
Enrollment16 (Actual)
SponsorNew York State Psychiatric Institute (Other); collaborators: National Institute of Mental Health (NIMH)
ConditionsClinical High Risk for Psychosis
InterventionsPomaglumetad methionil (Drug)
Datesstart 2018-04-17, primary completion 2020-03-13, completion 2020-03-13, first posted 2017-10-25, last updated 2021-12-01
Locations1 site in United States

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-Summary

Participants will be administered several doses of pomaglumetad (POMA) (low and high doses) over 14 days to individuals at clinical high risk for developing psychosis and use magnetic resonance imaging (MRI) brain imaging to determine whether these doses of POMA are affecting glutamate levels.

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+Detailed description

A double-blind, randomized, phase 1b, multiple dose trial of 14 days of treatment with POMA (80 mg, 160 mg, 240 mg, 320 mg) in clinical high risk patients to determine which dose, if any, reduces glutamate and metabolism using MRI techniques. The GO NO-GO decision will be whether or not any dose tested in the R61 phase of the trial decreases left hippocampal CA1 region cerebral blood volume (CBV).

+Arms and interventions

ArmTypeInterventionsDescription
POMA 40mg BID (80mg)ExperimentalDrug: Pomaglumetad methionilSubject will take 40mg pomaglumetad methionil (POMA) twice a day for 14 days.
POMA 80mg BID (160 mg)ExperimentalDrug: Pomaglumetad methionilSubject will take 80 mg pomaglumetad methionil (POMA) twice a day for 14 days
POMA 120mg BID (240mg)ExperimentalDrug: Pomaglumetad methionilSubject will take 120 mg pomaglumetad methionil (POMA) twice a day for 14 days
POMA 160 mg BID (320 mg)ExperimentalDrug: Pomaglumetad methionilSubject will take 160 mg pomaglumetad methionil (POMA) twice a day for 14 days
  • Pomaglumetad methionil (Drug), also known as POMA; LY2140023: metabotropic glutamate 2/3 receptor (mGlu2/3R) agonist

+Outcome measures

Primary outcomes

  • Percent Change in Left Hippocampal CA1 Region Cerebral Blood Volume (CBV) From Baseline to Day 14 [Baseline to 14 days of POMA/placebo]: Effect of POMA on left CA1 CBV as measured by percent change from baseline scan (Time 1) to Day 14 scan (Time 2)

+Eligibility

Sex: All, ages: 18 Years to 30 Years

Inclusion Criteria:

* Capacity to provide informed consent
* Currently using a reliable form of birth control

Exclusion Criteria:

* Metal implants in body or a history of metal working
* Lifetime diagnosis of asthmatic symptoms within the past 3 years or known sensitivity to contrast agents
* Lifetime diagnosis of renal failure/disease
* Acute neurological, neuroendocrine, or medical disorder including renal insufficiency (CrCl<40 mL/min/1.73m2)
* Lifetime diagnosis of hypertension or diabetes or seizure disorder
* IQ<70
* Acute risk for suicide and/or violence
* Pregnant lactating
* Current abuse of substances (alcohol, cocaine, stimulants, cannabis, opiates, sedative hypnotics)
* Current use or anticipated need for antipsychotics or mood stabilizers (all antipsychotics, also depakote, lithium, lamotrogine, pregabalin or any med with a mechanism of action like gabapentin), probenecid, selective serotonin reuptake inhibitors, tricyclic antidepressants, and monoamine oxidase inhibitors
* More than one previous gadolinium scan

+Posted results

Participant flow

MilestonePOMA 40mg BID (80mg)POMA 80mg BID (160 mg)POMA 120mg BID (240mg)POMA 160 mg BID (320 mg)
Started3323
Completed2322
Not completed1001

Outcome results

  • Percent Change in Left Hippocampal CA1 Region Cerebral Blood Volume (CBV) From Baseline to Day 14 (Primary), Mean, Percent change: POMA 40mg BID (80mg) 0.40684405 +/- .63605395; POMA 80mg BID (160 mg) -0.081559 +/- 0.1522939; POMA 120mg BID (240mg) 0.0219668 +/- 0.1484273; POMA 160 mg BID (320 mg) -0.0269017 +/- 0

Adverse events

Time frame: From consent to 30 days after last dose of study medication, up to 74 days (30-day screening period, 14-day randomization period, 30 day follow up)

ArmDeathsSerious adverse eventsOther adverse events
POMA 40mg BID (80mg)0/3 (0.0%)0/3 (0.0%)1/3 (33.3%)
POMA 80mg BID (160 mg)0/3 (0.0%)0/3 (0.0%)3/3 (100.0%)
POMA 120mg BID (240mg)0/2 (0.0%)0/2 (0.0%)1/2 (50.0%)
POMA 160 mg BID (320 mg)0/3 (0.0%)0/3 (0.0%)2/3 (66.7%)

Other adverse events by term

TermOrgan systemPOMA 40mg BID (80mg)POMA 80mg BID (160 mg)POMA 120mg BID (240mg)POMA 160 mg BID (320 mg)
nauseaGastrointestinal disorders1/32/31/22/3
lightheadednessNervous system disorders0/30/30/21/3
dizzinessNervous system disorders0/30/30/21/3
itching/restlessnessGeneral disorders0/31/30/20/3
sedationNervous system disorders0/31/30/20/3

+Locations (1)

FacilityCityCountryStatus
New York State Psychiatric InstituteNew York, New YorkUnited States

+Study documents

+Investigators

+Funding

NIH grants: R61MH112800

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