SAD Phase I Study (First-in-human) to Investigate Contraloid Acetate

A Randomized, Double-blind and Placebo-controlled Single Ascending-dose Phase I Study (First-in-human) to Investigate the Safety, Tolerability and Pharmacokinetics of Contraloid Acetate (in Healthy Subjects).

This is a single-center first-in-human single-ascending-dose clinical trial assessing the safety and tolerability of oral dosing of Contraloid acetate in healthy volunteers. The study drug Contraloid (alias RD2, alias PRI-002) is an orally available all-D-peptide, which was developed to directly destroy toxic and replicating A-beta oligomer prions, by disassembling them into A-beta monomers. The study drug is specifically designed for the curative or at least disease-modifying treatment of cognition, memory and behavior deficits in Alzheimer´s disease patients. The study drug is not designed to reduce brain plaque load or total A-beta in cerebrospinal fluid. The study drug is blood-brain-barrier penetrable [1] and has demonstrated target engagement in vitro and in vivo [2, 3]. Preclinical treatments in three different transgenic mouse models in three different laboratories yielded improved cognition and deceleration of neurodegeneration, even under truly non-preventive treatment conditions and even when applied orally [2-5]. The hereby obtained PRI-002 plasma levels have also been achieved in humans after single oral dosing.

Study Overview

• Status: Completed
• Conditions: Alzheimer Disease; Alzheimer Dementia
• Intervention / Treatment: Drug: Contraloid

Detailed Description

The investigation on the compound Contraloid acetate in a single-ascending-dose phase I study (first-in-human) has been performed in 40 healthy male participants, randomly assigned to the treatment. Main focus was on the evaluation of the outcome of the safety and tolerability; secondarily the pharmacokinetic characteristics of the compound were assessed. Five different ascending doses (4, 12, 36, 108, and 320 mg Contraloid) administered orally as a single dose, were tested in five cohorts on respectively six participants per cohort, additionally two participants of each cohort received placebo.

In order to maintain the highest level of security for the participants of this first-in-human study a staggered design was used. First, only two sentinels of each cohort were administered with the study drug or placebo (ratio 1:1). Only after assessing all available data by the data safety and monitoring board (DSMB), the rest of the cohort (5 study drug : 1 placebo) were allowed to be treated. This took place on two consecutive days, administering the study drug to three participants per each starting day. After DSMB permission the next higher dose level was started in the next cohort with the same scheme of administration.

During the screening period the informed consent was obtained and the evaluation of the inclusion and exclusion criteria, collection of demographic data and previous medical history, physical examination and health assessment, 12-lead ECG were performed. Additionally vital signs, haemogram, coagulation, biochemistry and urine analysis determination, as well as serology and testing of drug abuse were carried out.

On the first study day the participants received in fasting conditions the study drug after re-evaluation the inclusion/exclusion criteria. For monitoring the laboratory parameters and the pharmacokinetics of Contraloid blood draws were performed in a predetermined frequency. Physical conditions, vital signs, ECG and EEG, concomitant medication, adverse events were monitored closely. Sentinels stayed in the Phase-I Unit for 72 hours, and the remaining participants of the cohort for 24 hours. A follow-up was performed on Days 3, 4 and 8. The study was double-blinded and conducted under the EU regulations and Good Clinical Practice (GCP) and national Austrian law. Monitoring and PV was performed by the CRO NeuroScios, DM by Fundación Teófilo Hernando, Spain, bio-analytics by Triskelion, The Netherlands.

Contraloid (alias RD2, alias PRI-002) is an all-D-peptide, which was developed to directly destroy toxic and replicating A-beta oligomer prions by disassembling them into A-beta monomers. The study drug is specifically designed for the curative or at least disease-modifying treatment of cognition, memory and behavior deficits in Alzheimer´s disease patients. The study drug is not designed to reduce brain plaque load or total A-beta in cerebrospinal fluid. The study drug is blood-brain-barrier penetrable [1] and has demonstrated target engagement in vitro and in vivo [2, 3]. Preclinical treatments in three different transgenic mouse models in three different laboratories yielded improved cognition and deceleration of neurodegeneration, even under truly non-preventive treatment conditions and even when applied orally [2-5]. The hereby obtained PRI-002 plasma levels have also been achieved in humans after single oral dosing.

• Study Type: Interventional
• Enrollment (Actual): 40
• Phase: Phase 1

Contacts and Locations

Study Locations

• Germany
  • Jülich, Germany, 52425
    • Forschungszentrum Jülich

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 45 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Male

Description

Inclusion Criteria:

• With clinical history and physical examination results within normality.
• Electrocardiogram without clinically significant pathologic abnormalities and with QTc values lesser than 450 ms.
• Normotensive as defined by Systolic Blood Pressure ≤ 150 mm Hg. Diastolic Blood Pressure ≤ 90 mm Hg.
• BMI between 19.0 and 30.0 kg/m2.
• Body weight between 55 and 85 kg, inclusive
• Signed ICF

Exclusion Criteria:

• Any chronic medical condition (such as type 1 diabetes) requiring chronic treatment that might increase the risk to the subject or confound the interpretation of safety observations.
• Evidence of active infection requiring antibiotic therapy within 14 days prior to screening.
• Medical history of vasculitis or any autoimmune disease excluding seasonal allergic rhinitis and childhood history of atopic dermatitis.
• History of any treatment for cancer within the past 2 years, other than basal cell or squamous cell carcinoma of the skin.
• Seropositive for human immunodeficiency virus (HIV).
• History of acute/chronic hepatitis B or C and/or carriers of hepatitis B (seropositive for Hepatitis B surface antigen [HbsAg] or anti-Hepatitis C [HCV] antibody).

• Clinically significant abnormalities in screening laboratory tests, including:

  • Absolute neutrophil count < 1.4 x109
  • Alanine transaminase (ALT) or aspartate transaminase (AST) > 1.5 x the upper limit of normal (ULN)
  • Absolute lymphocyte count < 1.2 x 109
  • Lactate dehydrogenase (LDH) > 1.5 x ULN
  • Total bilirubin level: Out of normal range 0-1.5 mg/dL
  • eGFR < 60 mL/min
  • Hemoglobin (Hgb): out of normal range (male: 13,5-18,0 g/dL)
  • CK level higher than normal values (250U/L)
• All prescription, over-the-counter and herbal medications are prohibited within 10 days prior to study dosing (with exception of calcium/vitamin D supplements, nasal steroids, ocular medications, and paracetamol ≤1000 mg/day at the discretion of the Investigator).
• Use of an investigational drug within 2 months prior to dosing in this study.
• Any disorder that could interfere with the absorption, distribution, metabolism or excretion of drugs (e.g. small bowel disease, Crohn's disease, celiac disease, or liver disease.)
• Psychiatric history of current or past psychosis, bi-polar disorder, clinical depression, or anxiety disorder requiring chronic medication within the past 5 years.
• History of substance abuse, including alcohol
• Smokers
• History of substance or drug dependence, or positive urine drug screen at screening visit.
• History of head injury.
• Chronic kidney disease (defined as the presence of any degree of proteinuria on urine analysis and/or an eGFR of <60 ml/min using the MDRD formula).
• Any reason or opinion of the investigator that would prevent the subject from participation in the study.
• Inability to follow the instructions or an unwillingness to collaborate during the study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Sequential Assignment
• Masking: Double

Number of Arms

10

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Contraloid 4 mg; 4 mg Contraloid/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002
Active Comparator: Contraloid 12 mg; 12 mg Contraloid/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002
Active Comparator: Contraloid 36 mg; 36 mg Contraloid/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002
Active Comparator: Contraloid 108 mg; 108 mg Contraloid/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002
Active Comparator: Contraloid 320 mg; 320 mg Contraloid/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002
Placebo Comparator: Placebo (for Contraloid) 4 mg; 4 mg placebo/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002
Placebo Comparator: Placebo (for Contraloid) 12 mg; 12 mg placebo/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002
Placebo Comparator: Placebo (for Contraloid) 36 mg; 36 mg placebo/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002
Placebo Comparator: Placebo (for Contraloid) 108 mg; 108 mg placebo/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002
Placebo Comparator: Placebo (for Contraloid) 320 mg; 320 mg placebo/participant in a single oral dose with a staggered dose for sentinels followed by the rest of the cohort	Drug: Contraloid; Oral administration of capsules, drug substance or placebo without any excipients.; Other Names: PRI-002

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Assessment of safety and tolerability of Contraloid by monitoring vital signs, ECG, EEG, and lab values	To evaluate the safety and tolerability of Contraloid acetate in healthy subjects by assessing the number, severity and type of adverse events, including changes in vital signs, physical examinations, laboratory safety tests and ECGs.	8 days
Assessment of pharmacokinetics of Contraloid: Area under curve (AUC) in plasma	Area under curve (AUC) in plasma	72 hours
Assessment of pharmacokinetics of Contraloid: Cmax in plasma	Cmax in plasma	72 hours
Assessment of pharmacokinetics of Contraloid: Tmax in plasma	Tmax in plasma	72 hours
Assessment of pharmacokinetics of Contraloid: Terminal elimination half-life (t1/2) in plasma	Terminal elimination half-life (t1/2) in plasma	72 hours
Assessment of pharmacokinetics of Contraloid: Apparent total clearance (Cl/F) in plasma	Apparent total clearance (Cl/F) in plasma	72 hours
Assessment of pharmacokinetics of Contraloid: Volume of distribution (Vd) in plasma	Volume of distribution (Vd) in plasma	72 hours
AUC0-24 of Contraloid does not exceed of 2.3 µg·h/mL	Additionally, the AUC0-24 values of Contraloid in plasma will be determined in order to ensure that the recommended AUC0-24 of Contraloid does not exceed of 2.3 µg·h/mL in any of the subjects.	72 hours

Collaborators and Investigators

• Sponsor: Prof. Dr. Dieter Willbold
• Collaborators: Medical University of Vienna; Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany; NeuroScios, Austria; Fundación Teófilo Hernando, Spain; Triskelion, The Netherlands
• Investigators: Principal Investigator: Michael Wolzt, MD, University of Vienna

Publications and helpful links

Helpful Links

• Press releases of the research center Juelich
• Press releases of Priavoid

Study record dates

Study Major Dates

• Study Start (Actual): April 9, 2018
• Primary Completion (Actual): July 27, 2018
• Study Completion (Actual): July 27, 2018

Study Registration Dates

• First Submitted: April 26, 2019
• First Submitted That Met QC Criteria: May 8, 2019
• First Posted (Actual): May 9, 2019

Study Record Updates

• Last Update Posted (Actual): May 9, 2019
• Last Update Submitted That Met QC Criteria: May 8, 2019
• Last Verified: May 1, 2019

More Information

Terms related to this study

• Keywords: AD patients; anti-prionic; anti-Abeta-pionic; treatment of cognition and memory deficits; AD stage-independent; NOT anti-amyloid; neuron specific Ca-ion reduction
• Additional Relevant MeSH Terms: Mental Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Neurocognitive Disorders; Neurodegenerative Diseases; Dementia; Tauopathies; Alzheimer Disease
• Other Study ID Numbers: EUDRA-CT: 2017-000396-93

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No
• IPD Plan Description: Only as far as covered by the EU GDPR and regulated by GCP

Study Data/Documents

1. Bibliografic References
   Information comments:

   1. Leithold et al., Pharm Res. 33, 328-336 (2016).
   2. van Groen et al., Sci Rep 7, 16275 (2017).
   3. Schemmert et al., Mol Neurobiol 56, 2211 (2019).
   4. Kutzsche et al., Molecules 22, 1693 (2017).
   5. Schemmert et al., Neurobiol Dis 124, 36 (2019).

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No