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Trial record 1 of 1 for:    REGY-DN-201 | Neuropathy
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Ricolinostat in Patients With Painful Diabetic Peripheral Neuropathy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT03176472
Recruitment Status : Active, not recruiting
First Posted : June 5, 2017
Last Update Posted : July 19, 2022
Information provided by (Responsible Party):
Regenacy Pharmaceuticals LLC

Brief Summary:
This is a randomized, double-blind, 2-arm, parallel group study of up to 274 evaluable patients designed to evaluate the safety and efficacy of the histone deacetylase 6 (HDAC6) inhibitor ricolinostat for painful DPN.

Condition or disease Intervention/treatment Phase
Painful Diabetic Peripheral Neuropathy Drug: ricolinostat Drug: Placebo Phase 2

Detailed Description:

The study includes an approximately 12 week randomized, double-blind, placebo controlled Treatment period in which patients will receive either ricolinostat or placebo, followed by an approximately 12 week open label Safety Extension period during which all patients will receive ricolinostat 120 mg daily.

Prior to randomization, patients will be enrolled in a baseline Pain Observation period from Day -14 to Day -1, during which the NRS (average and worst pain) will be recorded daily using an electronic daily diary that will be completed by patients to allow patients to familiarize themselves with the pain rating procedures, and to establish a baseline and confirm eligibility to participate. Patients will also initiate daily dosing during this time to evaluate compliance eligibility for participation. A daily diary will be used by the patient to record the pain assessments and rescue medication use. A follow-up phone contact will be conducted at Day -7 to Day -5 to review diary and dosing compliance.

Following the baseline Pain Observation period, patients who meet entry criteria will be randomized in a 1:1 ratio to receive either ricolinostat or placebo. During the 12-week double-blind, placebo-controlled Treatment period, patients will return for assessments in accordance with the schedule of assessments. At the conclusion of the approximately 12 week open label Safety Extension period, patients will enter a Follow-up safety washout and assessment period, which will incorporate 2 visits at approximately 2 and 4 weeks following the final Safety Extension visit, with assessments performed as outlined in the schedule of assessments.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 282 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: Randomized, Double-Blind, Placebo-Controlled, Parallel Group Study
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Masking Description: double-blind
Primary Purpose: Treatment
Official Title: A Phase 2, Randomized, Double-Blind, Placebo-Controlled, Parallel Group Study of Ricolinostat in Patients With Painful Diabetic Peripheral Neuropathy
Actual Study Start Date : December 7, 2020
Estimated Primary Completion Date : October 31, 2022
Estimated Study Completion Date : February 15, 2023

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: ricolinostat
Ricolinostat 120 mg, taken once daily (QD) by mouth; each dose in 12 mL liquid formulation (10 mg ricolinostat per mL)
Drug: ricolinostat
120 mg per dose in 12 mL liquid formulation
Other Name: ACY-1215

Placebo Comparator: placebo
Placebo, 12 mL of liquid formulation with no active ingredient (i.e., ricolinostat), taken once daily (QD) by mouth
Drug: Placebo
12 mL liquid formulation placebo

Primary Outcome Measures :
  1. Mean Average Pain Intensity (NRS) [ Time Frame: Baseline week [Day-7 to Day 1] compared to Final week [12 Weeks] ]
    Difference between mean average pain intensity

Secondary Outcome Measures :
  1. Mean Average Pain Intensity (NRS) [ Time Frame: Baseline week [Day-7 to Day 1] compared to Week 4 ]
    Difference between mean average pain intensity

  2. Non-pain Neuropathic Signs (UENS) [ Time Frame: Baseline week [Day-7 to Day 1] compared to Week 12 ]
    Change in non-pain neuropathic signs

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Type 1 or Type 2 diabetes of at least 6 months with optimized and stable glycemic control during the 3 months prior to Screening
  • Painful distal symmetric sensorimotor polyneuropathy due to diabetes
  • Douleur Neuropathique 4 (DN4) score of ≥4
  • Satisfactory diary data during the 14-day Pain Observation period determined by an algorithm that includes diary compliance, overall level of pain and day-to-day variability in pain

Exclusion Criteria:

  • Pregnant or lactating
  • Body Mass Index (BMI) >40 kg/m2
  • Presence of any neuropathy other than DPN and/or significant risk factors for neuropathy other than diabetes
  • Other pain conditions that could confound the results of this study, or other chronic pain condition(s) that could affect compliance with pain medication restrictions or confound pain assessments
  • Painful DPN patients who have undergone lower limb amputations, are non-ambulatory, or whose walking is so impaired as to require a walker or other assistance for ambulation
  • Have met Diagnostic and Statistical Manual of Mental Disorders V (DSM V) criteria for opioid use disorder or alcohol use disorder
  • Opioid use at a dose of ≥ 30 morphine milligram equivalents on 3 or more days a week during the month prior to Screening
  • Suicidal ideation/behavior as measured by the Columbia-Suicide Severity Rating Scale (C-SSRS)
  • The use of marijuana or cannabidiol (CBD) during the 30 days prior to starting study drug
  • Chronic use of over-the-counter capsaicin on extremities within 3 months of Screening and/or prescription Qutenza use within 6 months of Screening
  • Corrected QT interval at Screening using QTcF of ≥450 msec (male) or ≥460 msec (female)
  • Hemoglobin < 11.5 g/dL (female) or < 13 g/dL (male), total white blood cell count < 2500/mm3, neutrophil count < 1250/mm3, lymphocyte count < 1000/mm3, or platelet count < 100,000/mm3
  • HIV positive and/or active hepatitis virus (A, B, or C) infection
  • Current or previous (≤1 month of Screening) enrollment in a clinical trial involving treatment with an investigational product
  • Any known recent exposure within the 14 days prior to initial Screening to coronavirus disease 2019 (COVID-19) or symptoms of COVID-19 infection or other reason to suspect COVID-19 infection as assessed by the Investigator at the time of initial Screening

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03176472

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Sponsors and Collaborators
Regenacy Pharmaceuticals LLC
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Responsible Party: Regenacy Pharmaceuticals LLC
ClinicalTrials.gov Identifier: NCT03176472    
Other Study ID Numbers: REGY-DN-201
First Posted: June 5, 2017    Key Record Dates
Last Update Posted: July 19, 2022
Last Verified: July 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Regenacy Pharmaceuticals LLC:
Diabetic Neuropathic Pain
Neuropathic Pain
Painful Diabetic Peripheral Neuropathy
Additional relevant MeSH terms:
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Diabetic Neuropathies
Peripheral Nervous System Diseases
Neuromuscular Diseases
Nervous System Diseases
Neurologic Manifestations
Diabetes Complications
Diabetes Mellitus
Endocrine System Diseases
Antineoplastic Agents
Histone Deacetylase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action