placebo as measured by change from baseline on the MADRS total score. There was a high placebo response in this trial. Consistent with previous studies in schizophrenia, lumatererone was well-tolerated in both bipolar depression studies, with a favorable safety profile. The rates of discontinuation due to treatment emergent adverse events for both doses of lumateperone were low. We are currently evaluating our strategy with regards to submitting our NDA to the FDA for regulatory approval for bipolar depression. Our global study evaluating adjunctive lumateperone in bipolar depression (Study 402) is ongoing.
In the second quarter of 2016, we initiated Phase 3 development of lumateperone for the treatment of agitation in patients with dementia, including Alzheimer’s disease, or AD. Our
ITI-007-201
trial was a Phase 3 multi-center, randomized, double-blind, placebo-controlled clinical trial in patients with a clinical diagnosis of probable AD and clinically significant symptoms of agitation. In the fourth quarter of 2018, an independent data monitoring committee, or DMC, completed a
pre-specified
interim analysis of the
ITI-007-201
trial, and concluded that the trial was not likely to meet its primary endpoint upon completion and therefore recommended the study should be stopped for futility. As a result, we determined to discontinue the
ITI-007-201
trial. Lumateperone was generally well tolerated in the
ITI-007-201
trial and the decision to discontinue the study was not related to safety. We are analyzing the data set from this trial and will determine the next steps in our program following completion of this analysis. We do not expect that these results will impact any of our other ongoing development programs.
We are also pursuing clinical development of lumateperone for the treatment of additional CNS diseases and disorders. At the lowest doses, lumateperone has been demonstrated to act primarily as a potent
5-HT2A
serotonin receptor antagonist. As the dose is increased, additional benefits are derived from the engagement of additional drug targets, including modest dopamine receptor modulation and modest inhibition of serotonin transporters. We believe that combined interactions at these receptors may provide additional benefits above and beyond selective
5-HT2A
antagonism for treating agitation, aggression and sleep disturbances in diseases that include dementia, AD, Huntington’s disease and autism spectrum disorders, while avoiding many of the side effects associated with more robust dopamine receptor antagonism. As the dose of lumateperone is further increased, leading to moderate dopamine receptor modulation, inhibition of serotonin transporters, and indirect glutamate modulation, these actions complement the complete blockade of
5-HT2A
serotonin receptors. At a dose of 60 mg,
ITI-007
has been shown effective in treating the symptoms associated with schizophrenia, and we believe this higher dose range will be useful for the treatment of bipolar disorder, depressive disorders and other neuropsychiatric diseases. Within the
ITI-007
portfolio, we are also developing a long-acting injectable formulation to provide more treatment options to patients suffering from mental illness. Given the encouraging tolerability data to date with oral lumateperone, we believe that a long-acting injectable option, in particular, may lend itself to being an important formulation choice for patients.
Given the potential utility for lumateperone and
follow-on
compounds to treat these additional indications, we may investigate, either on our own or with a partner, agitation, aggression and sleep disturbances in additional diseases that include autism spectrum disorders, depressive disorder, intermittent explosive disorder,
non-motor
symptoms and motor complications associated with Parkinson’s disease, and post-traumatic stress disorder. We hold exclusive, worldwide commercialization rights to lumateperone and a family of compounds from Bristol-Myers Squibb Company pursuant to an exclusive license.
We have a second major program called
ITI-002
that has yielded a portfolio of compounds that selectively inhibits the enzyme phosphodiesterase type 1, or PDE1.
ITI-214
is our lead compound in this program. We believe
ITI-214
is the first compound in its class to successfully advance into Phase 1 clinical trials. We intend to pursue the development of our phosphodiesterase, or PDE, program, including
ITI-214
for the treatment of several CNS and
non-CNS
conditions, including cardiovascular disease. Following the positive safety and tolerability results in our Phase 1 program, we initiated our development program for
ITI-214
for Parkinson’s disease and commenced patient enrollment in the third quarter of 2017 in a Phase 1/2 clinical trial of
ITI-214
in patients with Parkinson’s disease to evaluate safety and tolerability in this patient population, as well as motor and
non-motor
exploratory endpoints. In the fourth quarter of 2018, we announced that the Phase 1/2 clinical trial of
ITI-214
has been completed and topline results demonstrated
ITI-214
was generally well-tolerated with a favorable safety profile and clinical signs consistent with improvements in motor symptoms and dyskinesias. In addition, in the first quarter of 2018, the investigational new drug application, or IND, went into effect for
ITI-214
for the treatment of heart failure. We have initiated clinical conduct of the first clinical study in this program, a randomized, double-blind, placebo-controlled study of escalating single doses of
ITI-214
to evaluate safety and hemodynamic effects in patients with systolic heart failure.
Our pipeline also includes preclinical programs that are focused on advancing drugs for the treatment of schizophrenia, Parkinson’s disease, AD and other neuropsychiatric and neurodegenerative disorders. We are also investigating the development of treatments for disease modification of neurodegenerative disorders and
non-CNS
diseases, including our
ITI-333
development program.
ITI-333
is designed as a potential treatment for substance use disorders, pain and psychiatric comorbidities including depression and anxiety. There is a pressing need to develop new drugs to treat opioid addiction and safe, effective,
non-addictive
treatments to manage pain. We believe the potential exists for
ITI-333
to address these challenges. Preclinical safety studies with
ITI-333
are currently ongoing and we expect to initiate a clinical program in late 2019 or early 2020.