Mihael Polymeropoulos
Analyst · Graig Suvannavejh with Jefferies
Thank you, Jim. Good morning, and thank you very much for joining us. Over the last quarter, we have been making significant progress on our tasimelteon program. Tasimelteon is a circadian regulator which is being evaluated in clinical studies with the orphan indication, Non-24-Hour Sleep/Wake Disorder or Non-24, as well as for the treatment of major depressive disorder. Our goal is to assume a leadership position in the development of therapeutics that have a potential of resetting the body clock.
Many of our bodily functions, including the sleep-wake cycle, metabolic processes, mood regulation, homeostasis cardiovascular regulation, to name a few, are governed by the body clock. While the master body clock is located in the brain structure known as suprachiasmatic nucleus, SCN, peripheral tissues are also known to have their own clock that follow the influence of the master body clock. While the molecule is believed to have the ability to reset the body clock, and therefore, it may have corrective therapeutic properties in disorders where the body clock is aberrant.
The body clock is reset each day through the action of daily light exposure which sets in motion a number of molecular processes that result in a circadian period of exactly 24 hours in length. For many individuals, without daily exposure to light, the master body clock will run at a circadian period of longer than 24 hours, which is reflected in a population average of about 24.5 hours.
Blind individuals with no light perception suffering from Non-24 cannot reset their body clock to a 24-hour day and therefore will drift at a rate of about 0.5 hour a day. As a result, blind individuals who have suffered from Non-24 are often severely misaligned with a standard 24-hour sleep-wake schedule. Although there is a narrow window in the rotation where such a patient's body clock is correctly aligned, there are many more days in the rotation where they are out of alignment in such a manner that the body clock compels them to sleep during the day and stay awake at night. Thus, misalignment expresses itself with severely aberrant sleep and wake schedules that are incompatible with normal, social and occupational functioning, rendering these already disabled individuals significantly more impaired.
The condition is chronic and there are no available FDA-approved treatments that can reset the body clock. It is estimated that in the United States, there are approximately 65,000 to 95,000 individuals suffering from Non-24, although the awareness of the disorder is believed to be much lower among physicians and patients.
Experts agree that the definitive measure of the period of the body clock is a measurement over time of the night hormone, melatonin, which when misaligned could result in a longer than 24-hour body clock, causes this disorder. On average, individuals with Non-24 demonstrate a circadian period of melatonin secretion of approximately 24.5 hours, although the exact period of length varies from person to person.
Vanda has developed a clinical program to evaluate the effects of tasimelteon in resetting the master body clock in individuals with Non-24. Vanda's clinical program is the largest ever conducted and far exceeds any published work in groups of patients with Non-24. This program includes 2 main efficacy studies of tasimelteon known as SET and RESET. The goals of the SET study are to evaluate approximately 100 patients with the disorder and demonstrate the ability of tasimelteon to reset the master body clock in these individuals to a 24-hour period. The study includes a screening period, during which the circadian body clock period is measured for each study participant over 4 weeks. Individuals with a period longer than 24.25 hours are subsequently randomized to either placebo or tasimelteon for approximately 6 months. During this randomization period, the clock's period is reevaluated over a subsequent 4-week period. During screening, as well as during randomization, daily reports of nighttime and daytime sleep are recorded. We have identified approximately 75 of the 100 patients in the target population. We are currently in discussions with the Food and Drug Administration of the most appropriate way to analyze and present data so that the effect of tasimelteon can be evaluated.
In the second study, RESET, we intend to identify 20 patients who respond to the drug after 6 or more weeks of treatment. After a 6-week, open-label period, individuals are designated as responders, if their master body clock period is changed to that of exactly 24 hours. Responders are then randomized to either a placebo or tasimelteon, and their body clock is reevaluated. This study will allow us to determine whether withdrawal of tasimelteon from a responder will result in the resumption of Non-24.
On January 26, we reported that we have identified the first 4 responders to randomize in the RESET study. Since it is not expected that the body clock can reset itself continuously, our observation in these 4 patients demonstrate that tasimelteon can reset the body clock in patients with Non-24. This represents the first time that a drug product candidate has shown body clock resetting properties in humans, and it may open a new therapeutic arena for circadian-regulating drug projects.
The SET and RESET studies are expected to be completed by year end, and we expect to file a New Drug Application by mid-2013.
Tasimelteon is also under evaluation in our MAGELLAN study for efficacy in major depressive disorder. This is a 500-patient study, comparing the effects of tasimelteon to placebo in the treatment of symptoms of major depression. It is well established in the scientific literature that one of the functions of the body clock is to control mood and affect. It is further believed that misalignment of the body clock with external daily cues may lead to the development of an affective syndrome. We believe that tasimelteon's property to reset the body clock make it a good candidate for this application.
In the current studies, we're characterizing a number of classical endpoints of mood and sleep, as well as measuring properties of body clock alignment. Recruitment of the study is ongoing in approximately 40 sites in the U.S. We expect to report top line results from the study in the first half of 2013.
I will now turn to Fanapt in the United States. Novartis has reported revenues of $16.2 million for the fourth quarter of 2011, bringing the full year 2011 revenues to $44.8 million. Fanapt prescriptions, as reported by IMS, reached 33,000 in the fourth quarter of 2011, which was approximately equal to the third quarter of 2011. On a full year basis, prescriptions have grown from approximately 55,000 in 2010 to over 120,000 in 2011.
On the existing development front, Novartis is conducting a number of clinical studies, including a relapse prevention study in schizophrenia, a sleep study from espasla emlamprothene [ph] or hypicsolo [ph] to Fanapt, a pharmacokinetic tolerability study in adolescent patients, and a Phase II study of the once-a-month injectable formulation of iloperidone. The expected completion dates of all these studies are updated regularly by Novartis and can be found on clinicaltrials.gov.
Outside the U.S., we continue to pursue registration through our partners in several Latin American countries and Israel. After further evaluation of the regulatory environment, as well as the commercial opportunity in Singapore and Australia, we have no current plans to pursue registration in those countries.
The review of our Marketing Authorization Application in Europe by EMA is continuing. We have received the initial list of comments from EMA, which among others include questions that are being formally met [ph] of the iloperidone long-term maintenance study. We have requested and have been granted a 3-month extension of the review cycle in order to better prepare our responses to these questions. If the EMA does not accept the current long-term maintenance study, we may have to await the results of the ongoing study by Novartis, which is expected to be completed by the fourth quarter of 2013 before we can complete the EMA requirements. We will keep you informed of any significant progress at a future time.
I will now turn the call to Jim Kelly, our Chief Financial Officer, to discuss our financials for the fourth quarter and year ended December 31, 2011. Jim?