Safety and Efficacy of Intravenous Trappsol Cyclo (HPBCD) in Niemann-Pick Type C Patients

• ClinicalTrials.gov Identifier: NCT02912793
• Recruitment Status: Completed
• First Posted: September 23, 2016
• Last Update Posted: August 10, 2021
• Sponsor: Cyclo Therapeutics, Inc.
• Information provided by (Responsible Party): Cyclo Therapeutics, Inc.

Study Description

Brief Summary:

This research study is being conducted to find out whether Trappsol® Cyclo™, an experimental treatment for people with Niemann-Pick disease Type C1 (NPC-1) is safe at 3 different dose levels and what effects it has on people who have this condition. NPC-1 is caused by a defect in a protein which is important for the transport of fatty substances like cholesterol out of cells. Without this protein, fats build up in the cells ultimately leading to organ damage. The way in which this experimental treatment works is not fully understood but laboratory experiments have shown that it can potentially remove cholesterol build up from the cells in people who have NPC-1. Approximately 12 patients will be asked to take part in this research study for up to 56 weeks in total. recruitment is expected to take 9 months.Patients who take part will receive treatment by an intravenous infusion every two weeks. The study will look at what the body does to the drug as well as what the drug does to the body by taking and examining blood and urine samples. Samples of Cerebrospinal fluid (CSF) are also taken by lumbar puncture during and following the first treatment dose. Patients will also have their hearing tested, be asked questions by their doctor as well completing questionnaires to help assess any changes in their condition during treatment. Optional assessments patients can choose to take part in include liver biopsies, additional lumbar punctures for CSF.examinations to see if the drug is affecting these. This study is being sponsored and funded by CTD holdings INC. It is planned to be run in the UK, Italy, and Sweden.

Condition or disease	Intervention/treatment	Phase
Niemann-Pick Disease, Type C1	Drug: Hydroxypropyl-beta-cyclodextrin	Phase 1; Phase 2

Detailed Description:

The planned study has been designed as a Phase I/II, double-blind, randomised, multi-centre, parallel group study based on information and data available from the administration of Trappsol Cyclo via compassionate/named patient use in patients with NPC-1, and data on other cyclodextrin products in the scientific literature.

The study is comprised of two stages. The primary objective of Stage 1 is to compare the plasma pharmacokinetics of three different doses of IV Trappsol Cyclo in the prevention /delay of NPC-1 progression.Secondary objectives include investigation of the Hydroxypropyl Beta Cyclodextrin (HP-β-CD) effect of three different doses of IV Trappsol Cyclo upon serum and lymphocytic markers of cholesterol metabolism (Stages 1 and 2) and evaluation of concentrations in the cerebrospinal fluid (CSF) following intravenous (IV) administration (Stage 1), evaluation of the impact of treatment upon measures of neurological function including ataxia, aphasia and saccadic eye movements, and the impact of treatment upon behavioural aspects of NPC-1 (Stage 2).

It is planned to recruit a total of 12 patients to the study. Patients will be randomised 1:1:1 to one of the three dose levels (1500 mg/kg, 2000 mg/kg or 2500 mg/kg; four patients per dose level). Treatment will be administered every two weeks by slow IV infusion at a concentration of 250 mg/mL over 8 hours. Patients completing Stage 1 of the study will continue into Stage 2 and receive treatment for 48 weeks. Patients who withdraw prior to completion of the initial pharmacokinetic (PK) and pharmacodynamics (PD) assessments will be replaced.

The design of the proposed study thus enables early assessment of biochemical markers of response but allows for a sufficient dosing duration to enable the effectiveness of Trappsol in NPC-1 to be assessed.

As miglustat is an approved treatment for NPC-1 in the EU, with an established efficacy and safety profile, it would be unethical to exclude patients receiving miglustat therapy from the study, given that the study itself will also be conducted at sites in Europe. However, it is planned to balance randomisation across the treatment groups for its use.

The maximum dose proposed for this study is below the maximum dose for which long term clinical data is available in 2 patients (2800 mg/kg weekly for 3-5 years). Although individual clinicians have not always utilised an escalating rate of infusion, the reports of infusion related reactions in three patients suggest that this is an appropriate clinical strategy to mitigate the risk of such events and is consistent with dosing administration for other therapeutic agents. In the proposed study, treatment will be administered less frequently than has been undertaken in compassionate use. This longer dosing interval is supported by nonclinical data comparing the metabolism of cholesterol in non-human species with that in man; although a once weekly dosing interval was initially studied in man based on data in the mouse, HP-β-CD cholesterol metabolism/turnover in the mouse is 13-fold higher than in man which, in NPC-1, likely translates into a 13-fold slower accumulation of cholesterol in human cells compared with those of the mouse.Therefore, it is theorised that, given the slower cholesterol metabolism in humans, the dosing interval could be much less frequent in man than in mouse; however, based on what is known about cholesterol metabolism in humans and the pharmacokinetic and pharmacodynamic effect of HP-β-CD in the mouse, a dosing interval of 2 weeks in man is likely to be well within the therapeutic dosing interval and also minimises the amount of infusions required to be administered.

Study Design

• Study Type: Interventional (Clinical Trial)
• Actual Enrollment: 12 participants
• Allocation: Randomized
• Intervention Model: Parallel Assignment
• Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
• Primary Purpose: Treatment
• Official Title: A Phase I/II Study to Evaluate the Safety and PK of iv Trappsol Cyclo (HP-β-CD) in Patients With Niemann-Pick Disease Type C NPC-1 and the Pharmacodynamic Effects of Treatment Upon Markers of Cholesterol Metabolism and Clinical Outcomes
• Actual Study Start Date: March 20, 2017
• Actual Primary Completion Date: March 3, 2021
• Actual Study Completion Date: March 3, 2021

Arms and Interventions

Arm	Intervention/treatment
Active Comparator: Hydroxypropyl-beta-cyclodextrin IV 1500 mg/kg; Hydroxypropyl-beta-cyclodextrin administered by slow IV infusion for 8h every 2 weeks	Drug: Hydroxypropyl-beta-cyclodextrin; Used in the treatment of Niemann-Pick C1; Other Name: Trappsol Cyclo
Active Comparator: Hydroxy-propyl-beta-cyclodextrin IV 2000 mg/kg; Hydroxypropyl-beta-cyclodextrin administered by slow IV infusion for 8h every 2 weeks	Drug: Hydroxypropyl-beta-cyclodextrin; Used in the treatment of Niemann-Pick C1; Other Name: Trappsol Cyclo
Active Comparator: Hydroxypropyl-beta-cyclodextrin IV 2500 mg/kg; Hydroxypropyl-beta-cyclodextrin administered by slow IV infusion for 8h every 2 weeks	Drug: Hydroxypropyl-beta-cyclodextrin; Used in the treatment of Niemann-Pick C1; Other Name: Trappsol Cyclo

Outcome Measures

Primary Outcome Measures :

1. To evaluate the plasma the Maximum Concentration (C max) of 3 doses of Trappsol by measurement of plasma levels [ Time Frame: 0,2,4,6,& 8 hours (h) after the start of the IV infusion of Trappsol and 0.5,1,2,4,8 & 12 h after the end of the infusion ]
   To evaluate plasma PK of Trappsol by comparison of Maximum Concentration (Cmax ) of the three doses
2. To evaluate the Time to Maximum Concentration ( Tmax) of 3 doses of Trappsol by measurement of plasma levels [ Time Frame: 0,2,4,6,& 8h after the start of IV infusion of Trappsol and 0.5,1,2,4,6 &12h after the end of infusion ]
   To evaluate the plasma PK of Trappsol by comparison of the Tmax of three doses
3. To evaluate the Volume of Distribution of Trappsol by measurement of plasma levels [ Time Frame: ),2,4,6 & 8 h after the start of the IV infusion of Trappsol and 0.5,1,2,4,8,&12 h after the end of the infusion ]
   To evaluate the plasma PK of Trappsol by comparison of the Volume of Distribution of three doses
4. To evaluate the elimination half-life of Trappsol by measurement of plasma levels [ Time Frame: 0,2,3,6 & 8h after the start of IV infusion of Trappsol and 0.5,1,2,4,8 &12h after the end of infusion ]
   To evaluate the PK of Trappsol by comparison of the Elimination half-lives of three doses

Secondary Outcome Measures :

1. Markers of cholesterol metabolism [ Time Frame: Screening,Days1,2,3,5,8,Weeks 2,4,8,10,12,14,16,18,20,24,28,32,36,40,44,48 and follow-up ]
   To investigate the effect of 3 different doses of intravenous Trappsol in patients upon serum and lymphocytic markers of cholesterol metabolism in patients with NPC-1
2. CSF levels of HP-β-CD [ Time Frame: Pre then 4,8,and 12h after the start of the initial infusion ]
   To evaluate HP-β-CD concentrations in CSF following intravenous administration of Trappsol in patients with NPC-1 to determine if the drug crosses the blood brain barrier
3. Number of patients with treatment-related adverse events as assessed by CTCAE ( version 4.03) [ Time Frame: Screening,Days1,2,3,4,6,8,Week 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48 and follow-up ]
   Events will be gathered by spontaneous reporting, clinical observation and laboratory tests including standard audiology tests and auditory evoked potential to assess hearing
4. Abdominal ultrasound [ Time Frame: Baseline 12,24,36 and 48 weeks ]
   Change from baseline in hepatic and splenic morphology
5. The proportion of patients with a reduction from baseline in the NIH NPC severity scale [ Time Frame: Baseline and 48weeks ]
   Reduction of one point in two or more domains
6. Top evaluate the impact of treatment on ataxia [ Time Frame: Screening, baseline and weeks 12,18,36 and 48 ]
   Ataxia will be rated using the Scale for the assessment and rating of ataxia (SARA) in patients where age and cognitive function allow it.
7. To evaluate the effect of treatment on fine motor skills [ Time Frame: Screening, baseline and weeks 12,18,36 and 48 ]
   Motor skills will be assessed by the bead-threading test in patients where age and cognitive function allow it
8. To evaluate the effect of treatment on saccadic eye movements [ Time Frame: Screening, baseline and weeks 12,18,36 and 48 ]
   Changes in saccadic eye movements will be assessed by clinical observation.
9. To evaluate cognitive impairment [ Time Frame: Screening, baseline and weeks 12,18,36 and 48 ]
   Changes in cognitive impairment will be assessed using the Mini Mental Scale ( MMS) in patients where age and cognitive function allow it.

Other Outcome Measures:

1. Change from baseline in hepatic fractionated cholesterol [ Time Frame: Baseline , day 2 and 48weeks ]
   To investigate the impact of treatment on cholesterol handling by the liver
2. Exploratory measures of potential CSF Biomarkers [ Time Frame: Baseline, weeks 24and 48 ]
   To investigate the impact of treatment upon CSF markers of NPC-1 disease

Eligibility Criteria

• Ages Eligible for Study: 2 Years and older (Child, Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

1. Confirmed diagnosis of NPC-1 defined as one of the following

   • Two NPC-1 mutations on genotyping
   • One NPC-1 mutation and positive filipin staining (current or prior)
   • Vertical supranuclear gaze palsy [VSNGP] plus either ≥ one NPC-1 mutation or positive filipin staining and no NPC-2 mutations
2. NIH NPC Severity Score <30 and with no more than 4 individual domains with a score ≥ 3.

3. Age range: 2 years upwards

   • Inclusion of the first three paediatric patients will be restricted to individuals aged ≥ 5 years. Once the first three paediatric patients have safely completed stage 1, study entry will be open to all ages ≥2 years as per the protocol
4. Negative pregnancy test for females of child bearing potential

5. Written, informed consent

   -

Exclusion Criteria:

1. The presence of NPC-2 mutations on genotyping
2. Previous receipt of cyclodextrin therapy
3. Lanksy score < 50 if aged ≤16 or Karnofsky score < 40 if aged > 16.
4. Inability to comply with the proposed protocol assessments
5. Concurrent treatment with any type of cholesterol lowering agents such as statins, fibrates, ezetimibe
6. Concurrent medical conditions representing a contraindication to any of the study medications
7. Stage 3 renal impairment or worse as indicated by eGFR< 60mL/min using the MDRD equation
8. Clinical evidence of acute liver disease including symptoms of jaundice or right upper quadrant pain or INR >1. 8
9. Involvement in another interventional clinical trial within the previous 6 months
10. Weight >100 kg
11. Females of childbearing potential who are not willing to use a method of highly effective contraception (hormonal contraception, intrauterine device, intrauterine hormone-releasing system, bilateral tubal occlusion, vasectomised partner, or true abstinence) during the study and the follow-up period. True abstinence can only be in line with the preferred and usual lifestyle of the subject. Periodic abstinence (e.g., calendar, ovulation, symptothermal, post-ovulation methods), declaration of abstinence for the duration of a trial, and withdrawal are not acceptable methods of contraception.

12. Females who are breastfeeding

    -

Contacts and Locations

Locations

Israel

Soroka Mc

Beer sheva, Rager Blvd, Israel, 85025

HaeMek MC

'Afula, Israel, 1834111

Sweden

Karolinska Trial Alliance

Solna, Huddinge, Sweden, 141 76

United Kingdom

Salford Royal Hospital

Salford, Greater Manchester, United Kingdom, M6 8HD

Leonard Wolfson Experimental Neurology Centre

London, United Kingdom, WC1N 3BG

Sponsors and Collaborators

Cyclo Therapeutics, Inc.

Investigators

• Principal Investigator: Reena Sharma, MB BS; Salford Royal Foundation NHS Trust,

More Information

Publications:

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• Responsible Party: Cyclo Therapeutics, Inc.
• ClinicalTrials.gov Identifier: NCT02912793
• Other Study ID Numbers: CTD-TCNP-201
• First Posted: September 23, 2016
• Last Update Posted: August 10, 2021
• Last Verified: August 2021

Individual Participant Data (IPD) Sharing Statement:

• Plan to Share IPD: No

• Studies a U.S. FDA-regulated Drug Product: No
• Studies a U.S. FDA-regulated Device Product: No

Additional relevant MeSH terms:

Pick Disease of the Brain; Aphasia, Primary Progressive; Frontotemporal Dementia; Niemann-Pick Diseases; Niemann-Pick Disease, Type A; Niemann-Pick Disease, Type C; Frontotemporal Lobar Degeneration; Dementia; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Neurocognitive Disorders; Mental Disorders; Aphasia; Speech Disorders; Language Disorders; Communication Disorders; Neurobehavioral Manifestations; Neurologic Manifestations; TDP-43 Proteinopathies; Neurodegenerative Diseases; Proteostasis Deficiencies; Metabolic Diseases; Sphingolipidoses; Lysosomal Storage Diseases, Nervous System; Brain Diseases, Metabolic, Inborn; Brain Diseases, Metabolic; Histiocytosis, Non-Langerhans-Cell; Histiocytosis; Lymphatic Diseases