Auris Medical Announces Randomization of First Dose Cohort in AM-201 Phase 1b Proof-of-Concept Study
Hamilton, Bermuda, March 29, 2019 - Auris Medical Holding Ltd. (NASDAQ: EARS), a clinical-stage company dedicated to developing therapeutics that address important unmet medical needs in neurotology and central nervous system disorders, today announced that the first cohort of subjects have been randomized in its Phase 1b proof-of-concept trial of AM-201, the Company's investigational drug for the prevention of antipsychotic-induced weight gain and somnolence.
The Phase 1b trial with AM-201 is being conducted at one European site. The trial will enroll in total 50 healthy volunteers who will receive either AM-201 or placebo concomitantly with the antipsychotic drug olanzapine over four weeks. The protocol is based on a dose escalation with five different doses of intranasal betahistine. The primary efficacy outcome will be the reduction in weight gain and the secondary outcome will be the reduction in somnolence.
"We are excited to have started the Phase 1b trial with AM-201 only five months after demonstrating significantly higher plasma levels with intranasal delivery of betahistine in a previous trial," commented Thomas Meyer, Auris Medical's founder, Chairman and CEO. "We expect, if all goes well, to obtain top-line data from the trial during the third quarter and thus obtain swiftly the first proof-of-concept data with AM-201. Prior preclinical and clinical work with oral betahistine has already provided evidence for the compound's effect on antipsychotic-induced weight gain and somnolence."
Betahistine is a small molecule structural analog of histamine, which acts as an agonist at the H1 and as an antagonist at the H3 histamine receptors. Unlike histamine, it crosses the blood-brain-barrier. It is known to enhance inner ear and cerebral blood flow, increase histamine turnover and enhance histamine release in the brain, increase release of acetylcholine, dopamine and norepinephrine in the brain and to result in general brain arousal. Betahistine for oral admin-istration is approved in about 115 countries, with the US being a notable exception, for the treatment of vertigo and Meniere's disease. The compound has a very good safety profile, yet it is also known that its clinical utility is held back by poor bioavailability. Intranasal administration of betahistine has been shown to result in 4 to 26 times higher bioavailability.
Intranasal betahistine is being developed under project code AM-201 for the prevention of antipsychotic-induced weight gain and somnolence. Many antipsychotic drugs are known to block the H1 histamine receptor, which is involved in the control of appetite and wakefulness, resulting in weight gain and somnolence as side effects. As an H1 receptor agonist, betahistine is thought to counteract the antipsychotics' inhibitory effects; in addition, betahistine blocks presynaptic H3 histamine autoreceptors, thus increasing histamine release and in turn augmenting betahistine's direct agonistic effects on H1 receptors.
About Auris Medical
Auris Medical is a biopharmaceutical company dedicated to developing therapeutics that address important unmet medical needs in neurotology and mental health supportive care. The company is focused on the development of intranasal betahistine for the treatment of vertigo (AM-125) and for the prevention of antipsychotic-induced weight gain and somnolence (AM-201). These projects have gone through two Phase 1 trials and will move into proof-of-concept studies in 2019. In addition Auris Medical has two Phase 3 programs under development: Sonsuvi® (AM-111) for acute inner ear hearing loss and Keyzilen® (AM-101) for acute inner ear tinnitus. The Company was founded in 2003 and is headquartered in Hamilton, Bermuda with its main operations in Basel, Switzerland. The shares of Auris Medical Holding Ltd. trade on the NASDAQ Capital Market under the symbol "EARS."
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