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Efficacy and Safety of NYX-2925 in Subjects With Neuropathic Pain Associated With Diabetic Peripheral Neuropathy (DPN)

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. Identifier: NCT03219320
Recruitment Status : Completed
First Posted : July 17, 2017
Last Update Posted : January 18, 2019
Syneos Health
Information provided by (Responsible Party):

Brief Summary:
To evaluate the efficacy of multiple dose levels of NYX-2925 versus placebo in treating the neuropathic pain associated with Diabetic Peripheral Neuropathy.

Condition or disease Intervention/treatment Phase
Diabetic Peripheral Neuropathy Drug: NYX-2925 Drug: Placebo Phase 2

Detailed Description:

This is a randomized, double-blind, parallel-group, placebo-controlled, multiple-dose study to assess the efficacy and safety of NYX-2925 in subjects with neuropathic pain associated with diabetic peripheral neuropathy.

The study will be a 6 to 9-week study, including a 1 to 4-week (dependent on duration of washout period) Screening Period, followed by a 4-week double-blind, randomized, placebo-controlled Treatment Period, and a 1-week Follow Up Period. Subjects eligible for the study will randomize to receive either NYX-2925 or placebo for 4 weeks.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 302 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: Subjects will be randomized to receive placebo or NYX-2925.
Masking: Triple (Participant, Care Provider, Investigator)
Masking Description: Treatment arms, dose levels, and randomization algorithm are masked.
Primary Purpose: Supportive Care
Official Title: A Randomized, Double-Blind, Parallel-Group, Placebo-Controlled, Multiple-Dose Study to Assess the Efficacy and Safety of NYX-2925 in Subjects With Neuropathic Pain Associated With Diabetic Peripheral Neuropathy
Actual Study Start Date : June 27, 2017
Actual Primary Completion Date : November 2, 2018
Actual Study Completion Date : November 2, 2018

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Placebo Comparator: Placebo Oral Capsule
Up to 300 subjects: Placebo
Drug: Placebo
Matching Placebo capsules.

Experimental: NYX-2925
Up to 300 subjects: Multiple dose levels of NYX-2925 daily for 28 days
Drug: NYX-2925
NYX-2925 is a novel small molecule that modulates the N-methyl-D-aspartate receptor (NMDAR).

Primary Outcome Measures :
  1. Numeric Rating Scale (NRS) average pain intensity [ Time Frame: From baseline (average of -7 to -1) to Week 4 (average of Days 22 through 28) ]
    Change in the NRS score assessing average pain intensity in the past 24 hours

Secondary Outcome Measures :
  1. Numeric Rating Scale (NRS) daily worst pain intensity [ Time Frame: From baseline (average of Day -7 to -1) to Week 4 (average of Days 22 through 28) ]
    Change in the mean NRS score for daily worst pain intensity

  2. Numeric Rating Scale (NRS) average pain intensity [ Time Frame: From baseline (average of Days -7 to -1) to each week of treatment (average of Days 1 through 7, Days 8 through 14, and Days 15 through 21) ]
    Change in the mean NRS score assessing average pain intensity in the past 24 hours

  3. Numeric Rating Scale (NRS) average pain upon walking intensity [ Time Frame: From baseline (average of Days -7 to -1) to each week of treatment (average of Days 1 though 7, Days 8 through 14, Days 15 through 21, and Days 22 through 28) ]
    Change in the mean NRS score assessing average pain upon walking intensity in the past 24 hours

  4. Patient Global Impression of Change (PGI-C) [ Time Frame: At weeks 2 and 4 ]
  5. Brief Pain Inventory for Diabetic Peripheral Neuropathy (BPI-DPN) [ Time Frame: From baseline (Visit 2) to Week 4 ]
    Change in BPI-DPN

Other Outcome Measures:
  1. Adverse Events [ Time Frame: From Screening to Week 5 ]
  2. Physical Examination Findings [ Time Frame: Screening, Baseline, and Week 4 ]
  3. Electrocardiograms [ Time Frame: Screening, Baseline, and Week 4 ]
  4. Clinical Laboratory Results [ Time Frame: From Screening to Week 5 ]
  5. Sheehan Suicidality Tracking Scale [ Time Frame: From Screening to Week 4 ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. An Institutional Review Board-approved written informed consent and privacy language (Health Insurance Portability and Accountability Act) authorization must be obtained from the subject prior to performing any study-related procedures.
  2. Subjects who consent to being included in a subject registry database.
  3. Male and female subjects ≥18 and ≤75 years of age.
  4. Subjects with a diagnosis of Type 2 diabetes.
  5. Subjects with a score of ≥4 and ≤9 on the 11-point NRS for average pain intensity over the past 24 hours at Visit 1.
  6. Hemoglobin A1c (HbA1c) ≤11% (measured at Visit 1).
  7. Stable use of diabetic medications beginning 1 month prior to Visit 1 (Adequate glycemic control with only diet and exercise is also permitted.).
  8. Subjects with diabetic peripheral neuropathy, of symmetrical nature and in lower extremities for ≥6 months to ≤10 years, and diagnosed by a score of ≥3 on Michigan Neuropathy Screening Instrument.
  9. Body mass index of <40 kg/m^2
  10. Calculated creatinine clearance of ≥60 mL/minute (Cockcroft-Gault formula).
  11. Clinical laboratory values must be within normal limits or deemed not clinically significant by the investigator and sponsor-designated medical monitor.

Inclusion Criteria: Randomization Daily pain scores and diary compliance will be transferred into the interactive response technology system, which will assess the criteria for randomization. Subjects whose mean of the daily average pain intensity score during the preceding 7 (±1) days is within the protocol-defined algorithm and with adequate compliance with daily diary completion will be eligible for randomization.

Waivers to the inclusion criteria will NOT be allowed.

Exclusion Criteria:

  1. Subjects who have a current diagnosis of major psychiatric disorder (including schizophrenia, bipolar disorder, or panic disorder), including those who have required an antipsychotic or mood stabilizer (e.g., lithium, carbamazepine, valproate) for a psychiatric condition in the past year, or subjects who have had a major depressive episode (MDE) in the past 6 months. Subjects with major depressive disorder (MDD) or generalized anxiety disorder (GAD) who have been on stable medications for the past 3 months (and are expected to remain stable for the duration of the trial) and whose condition is currently well-controlled may be included.
  2. Subjects who have pain that cannot be clearly differentiated from, or could interfere with the assessment of peripheral diabetic neuropathy, as measured by the Masquerading Disorders Tool at Visit 1.
  3. Neurologic disorders unrelated to diabetic neuropathy (e.g., phantom limb from amputation), skin condition in the area of neuropathy that could alter sensation (e.g., plantar ulcer), or other painful conditions (e.g., arthritis) that, in the judgment of the investigators, could interfere with reporting of pain due to diabetic neuropathy.
  4. History of hypoglycemia that disturbed consciousness, or ketoacidosis requiring hospitalization within past 3 months.
  5. Subjects with history of severe renal impairment.
  6. Impaired hepatic function.
  7. Known history of significant cardiovascular condition.
  8. History of Huntington's disease, Parkinson's disease, Alzheimer's disease, Multiple Sclerosis, or a history of seizures, epilepsy, or strokes.
  9. HIV infection, hepatitis, or other ongoing infectious disease that the investigator considers clinically significant.
  10. Concomitant use of antiepileptic drugs, non-steroidal anti-inflammatory drugs (except cardiac preventive acetylsalicylic acid), opioids, muscle relaxants, dextromethorphan (except low dose intermittent use for cough), tramadol, topical lidocaine, topical capsaicin, and selective norepinephrine reuptake inhibitors. Subjects are allowed to enter with a maximum of 1 allowed analgesic medication for neuropathic pain that has been taken at stable dose for at least 1 month (30 days) prior to Visit 1. Allowed analgesics may not be N-methyl-D-aspartate receptor ligands, must be non-opioid and non-sedative and must not interfere with subjects' pain reporting. Tricyclic antidepressants may be continued if designated as the single analgesic medication for the treatment of pain.
  11. Sensitivity to, allergy to, or concomitant use of N-methyl-D-aspartate receptor ligands including ketamine, amantadine, dextromethorphan (except low dose intermittent use for cough), memantine, methadone, dextropropoxyphene, and/or ketobemidone.
  12. Amputations of lower extremities (toe amputation is allowed).
  13. Any condition, including serious medical conditions that could interfere with the ability of the subject to participate in the study or could confound study assessments.
  14. Subjects who meet the criteria for suicidal intent, plan and/or behavior by scoring 3 or 4 on Questions 2 or 13, or 2 or higher on any Questions 1a (only if 1b is coded YES), 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, or 14 based on the S-STS (Sheehan - Suicidality Tracking Scale) at Visit 1 or Visit 2.

Waivers to the exclusion criteria will NOT be allowed.

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 identifier (NCT number): NCT03219320

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Sponsors and Collaborators
Syneos Health

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Responsible Party: Aptinyx Identifier: NCT03219320     History of Changes
Other Study ID Numbers: NYX-2925-2001
First Posted: July 17, 2017    Key Record Dates
Last Update Posted: January 18, 2019
Last Verified: January 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes

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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 Aptinyx:
Type 2 Diabetes
Neuropathic Pain
Peripheral Nervous System

Additional relevant MeSH terms:
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Peripheral Nervous System Diseases
Diabetic Neuropathies
Neuromuscular Diseases
Nervous System Diseases
Neurologic Manifestations
Signs and Symptoms
Diabetes Complications
Diabetes Mellitus
Endocrine System Diseases