A Study Of The Analgesic (Pain-Relief) Effects Of Tanezumab In Adult Patients With Diabetic Peripheral Neuropathy

A PHASE 2 RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED, MULTICENTER, PARALLEL GROUP, PROOF OF CONCEPT STUDY OF THE ANALGESIC EFFECTS OF TANEZUMAB IN ADULT PATIENTS WITH DIABETIC PERIPHERAL NEUROPATHY

The purpose of this study is to determine the effectiveness and safety of the investigational drug, tanezumab, in adult patients with painful diabetic peripheral neuropathy.

Study Overview

• Status: Terminated
• Conditions: Diabetic Peripheral Neuropathy
• Intervention / Treatment: Biological: Tanezumab; Biological: placebo

Detailed Description

This study was terminated on 18 November 2010 following a US FDA clinical hold for the tanezumab diabetic peripheral neuropathy clinical study which halted dosing and enrollment of patients on 19 July 2010 for potential safety issues.

• Study Type: Interventional
• Enrollment (Actual): 73
• Phase: Phase 2

Contacts and Locations

Study Locations

• United States
  • Alabama
    • Mobile, Alabama, United States, 36608
      • Coastal Clinical Research, Inc.
    • Mobile, Alabama, United States, 36608
      • Alabama Orthopaedic Clinic
  • Arizona
    • Goodyear, Arizona, United States, 85395
      • Dedicated Clinical Research
    • Goodyear, Arizona, United States, 85395
      • Valley Radiology, Ltd.
    • Litchfield Park, Arizona, United States, 85340
      • Dedicated Clinical Research
  • Arkansas
    • Little Rock, Arkansas, United States, 72205
      • Clinical Trials, Inc.
  • California
    • Anaheim Hills, California, United States, 92807
      • Anaheim Hills MRI Holdings, Inc
    • Fullerton, California, United States, 92835
      • Fullerton Neurology and Headache Center
    • Irvine, California, United States, 92618
      • NervePro Medical Corporation
    • Irvine, California, United States, 92618
      • United Medical Imaging Healthcare (X-Ray Only)
    • La Jolla, California, United States, 92037
      • Coordinated Clinical Research
    • La Jolla, California, United States, 92037
      • LabCorp (Draw blood only)
  • Colorado
    • Boulder, Colorado, United States, 80304
      • Alpine Clinical Research Center, Inc
  • Florida
    • Atlantis, Florida, United States, 33462
      • JEM Research Institute
    • Atlantis, Florida, United States, 33462
      • Medical Specialists of the Palm Beaches
    • Bradenton, Florida, United States, 34205
      • Bradenton Research Center, Inc.
    • Clearwater, Florida, United States, 33756
      • Innovative Research of West Florida, Inc.
    • Destin, Florida, United States, 32541
      • SJS Clinical Research, Inc.
    • Fort Walton Beach, Florida, United States, 32547
      • White Wilson Medical Center
    • Hallandale Beach, Florida, United States, 33009
      • MD Clinical
    • North Palm Beach, Florida, United States, 33408
      • Laszlo J. Mate, MD
    • Palm Beach Gardens, Florida, United States, 33418
      • Palm Beach Neurological Center, Advanced Research Consultants, Inc.
    • Sunrise, Florida, United States, 33351
      • Neurology Clinical Research, Inc.
  • Georgia
    • Decatur, Georgia, United States, 30033
      • Neurology Specialists of Decatur
    • Decatur, Georgia, United States, 30033
      • Neurology Specialists of Decatur Research Center
  • Indiana
    • Fort Wayne, Indiana, United States, 46805
      • Allied Physicians Inc d/b/a Fort Wayne Neurology
    • Greenfield, Indiana, United States, 46140-2834
      • American Health Network of IN, LLC
    • Greenfield, Indiana, United States, 46140-2834
      • Radiology Department, American Health Network
  • Kansas
    • Lenexa, Kansas, United States, 66215
      • Lee Research Institute
  • Maryland
    • Hollywood, Maryland, United States, 20636
      • Mid-Atlantic Medical Research Centers
  • Michigan
    • Ann Arbor, Michigan, United States, 48104
      • Michigan Head Pain and Neurological Institute
  • Missouri
    • Nixa, Missouri, United States, 65714
      • Ozarks Community Hospital Christian County Clinic
    • Springfield, Missouri, United States, 65807
      • Clinvest/A Division of Banyan Group, Inc.
  • Montana
    • Missoula, Montana, United States, 59802
      • Montana Neuroscience Institute Foundation
  • North Carolina
    • Asheville, North Carolina, United States, 28806
      • Asheville Neurology Specialists, PA
  • Ohio
    • Dayton, Ohio, United States, 45432
      • Hometown Urgent Care and Research
    • Dayton, Ohio, United States, 45417
      • Joel Vandersluis, MD
    • Toledo, Ohio, United States, 43623
      • Neurology and Neuroscience Center of Ohio
  • Oklahoma
    • Oklahoma City, Oklahoma, United States, 73112
      • Lynn Health Science Institute
    • Oklahoma City, Oklahoma, United States, 73112
      • Mark A. Fisher M.D. -Private Practice
  • Pennsylvania
    • Greensburg, Pennsylvania, United States, 15601-2234
      • Westmoreland Neurology Associates, Inc
  • South Carolina
    • Orangeburg, South Carolina, United States, 29118
      • The Neurology and Pain Clinic
  • Texas
    • Houston, Texas, United States, 77062
      • Centex Research/Pineloch Medical Center
    • San Antonio, Texas, United States, 78229
      • Innovative Clinical Trials
    • San Antonio, Texas, United States, 78205
      • Paragon Research Center, LLC
  • Utah
    • Salt Lake City, Utah, United States, 84107
      • Wasatch Clinical Research
    • Salt Lake City, Utah, United States, 84102
      • Daniel B. Vine, MD
    • West Jordan, Utah, United States, 84084
      • RGL Medical Services

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 99 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Diagnosis of diabetes mellitus (high blood sugar) with HbA1c levels of ≤11% at Screening, and on a stable anti-diabetic medication regimen for the 30 days prior to randomization.
• Diagnosis of diabetic peripheral neuropathy pain in the legs or feet with decreased sensation in the feet or decreased/absent ankle jerk/ reflexes.
• Presence of ongoing pain due to diabetic peripheral neuropathy for at least 3 months.
• A pain score of greater than or equal to (≥) 4 for from diabetic peripheral neuropathy on the Numerical Rating Scale (NRS), a 11-point scale with 0 meaning no pain and 10 meaning worst pain at Screening.
• Be willing to stop all pain medications for diabetic peripheral neuropathy except for the limited use of acetaminophen (Tylenol) or ibuprofen-like (Motrin) medications between Screening and Baseline and not use prohibited pain medications throughout the duration of the study except as permitted by the study guidelines.

Exclusion Criteria:

• Painful neuropathies other than diabetic peripheral neuropathy.
• Other types of diabetic neuropathies.
• Patients with a past history of carpal tunnel syndrome (CTS) with signs or symptoms of CTS in the one year prior to Screening are not eligible for participation.
• Patients with fibromyalgia, regional pain caused by lumbar or cervical compression with radiculopathy or other moderate to severe pain.
• Patients with a present (current) history of sciatica are not eligible for participation.
• The presence of pain conditions that cannot be distinguished from diabetic peripheral neuropathy such as peripheral vascular disease.
• Amputations dues to diabetes.
• Patient with any clinically significant medical condition or laboratory abnormalities.
• History, diagnosis, or signs and symptoms of clinically significant neurological diseases (such as Alzheimer's disease, head trauma, epilepsy or stroke).
• History, diagnosis, or signs and symptoms of clinically significant psychiatric diseases (such as bipoar disorder or schizophrenia).
• History of known alcohol, analgesic or drug abuse within 2 years of Screening.
• Pregnant women, lactating mothers, women suspected of being pregnant, and women who wish to be pregnant during the course of clinical study.

Study Plan

How is the study designed?

Design Details

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

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo	Biological: placebo; Placebo to match tanezumab 20 mg subcutaneous injection every 8 weeks x 2 doses (at Baseline and week 8)
Experimental: Tanezumab	Biological: Tanezumab; 20 mg subcutaneous injection every 8 weeks x 2 doses (at Baseline and week 8); Other Names: PF-04383119

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change From Baseline in Average Diabetic Peripheral Neuropathy (DPN) Pain Score at Week 16	Participants assessed their DPN pain during the past 24 hours using 11-point Numeric Rating Scale (NRS) with score range of 0 (no pain) to 10 ( worst possible pain). Baseline score was calculated as the mean of the average pain scores over the 3 days in the initial pain assessment period. The Week 16 value was the average DPN Pain score calculated for the 7 days prior to and including Day 113 (Week 16).	Baseline, Week 16

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change From Baseline in Average Diabetic Peripheral Neuropathy (DPN) Pain Score at Week 1, 2, 4, 6, 8, and 12	Participant rated their DPN pain using 11-point NRS with score ranging from 0 (no pain) to 10 (worst possible pain) during past 24-hour period. Higher score indicated greater level of pain. Change: score at observation minus score at baseline.	Baseline, Week 1, 2, 4, 6, 8, 12
Number of Participants With Cumulative Reduction From Baseline in Average Diabetic Peripheral Neuropathy (DPN) Pain Score at Week 16	Participant rated their DPN pain using 11-point NRS with score ranging from 0 (no pain) to 10 (worst possible pain) during past 24-hour period. Higher score indicated greater level of pain.	Week 16
Number of Participants With at Least 30 Percent (%), 50%, 70% and 90% Reduction From Baseline in Average DPN Pain Score: Last Observation Carried Forward (LOCF)	Participant rated their DPN pain using 11-point NRS with score ranging from 0 (no pain) to 10 (worst possible pain) during past 24-hour period. Higher score indicated greater level of pain. Change: score at observation minus score at baseline.	Week 1, 2, 4, 6, 8, 12, 16
Change From Baseline in Brief Pain Inventory-Short Form (BPI-sf) Worst and Average Pain Score at Week 8 and 16	BPI-sf (Brief Pain Inventory-short form) is a participant-administered questionnaire developed to assess the severity of pain and the impact of pain on daily functions during the 24-hour period prior to evaluation. It consists of 5 questions. Questions 1-4 measure the magnitude of pain at its worst and least (in the last 24 hours), average, and right now. Responses are provided by the participant on an 11-point numeric rating scale with anchors at 0 (No Pain) and 10 (Pain as bad as you can imagine). Question 5 consists of 7 item subsets (A to G) which measure the level of interference of pain on daily functions. Responses are given on an 11-point numeric rating scale with anchors at 0 (Does not interfere) and 10 (Completely interferes). The instrument is scored by item and by dimension, with lower scores indicating less pain or pain interference.	Baseline, Week 8, 16
Change From Baseline in Neuropathic Pain Symptom Inventory (NPSI) Total Score at Week 8 and 16: Last Observation Carried Forward (LOCF)	Participant rated questionnaire to evaluate different symptoms of neuropathic pain (burning [superficial] spontaneous pain, pressing [deep] spontaneous pain, paroxysmal pain, evoked pain, and paresthesia/dyesthesia [P/D]) during past 24-hour period and included 10 descriptors quantified on a 0 (no symptoms) to 10 (worst symptoms imaginable) and 2 temporal items assessing duration of spontaneous ongoing and paroxysmal pain. Questionnaire generated a score in each of the relevant dimensions and a total score of 0-100. Higher score indicated a greater intensity of pain.	Baseline, Week 8, 16
Change From Baseline in BPI-sf Pain Interference Index and Pain Interference Score for General Activity, Walking Ability, Sleep and Normal Work at Week 8 and Week 16	BPI-sf (Brief Pain Inventory-short form) is a participant-administered questionnaire developed to assess the severity of pain and the impact of pain on daily functions during the 24-hour period prior to evaluation. It consisted of 5 questions. Questions 1-4 measure the magnitude of pain at its worst and least (in the last 24 hours), average, and right now. Responses were provided by the participant on an 11-point numeric rating scale with anchors at 0 (No Pain) and 10 (Pain as bad as you can imagine). Question 5 consisted of 7 item subsets (A to G) as being pain interference with general activity; mood; walking ability; normal work (outside home and housework); relations with other people; sleep and enjoyment of life. Responses were given on an 11-point numeric rating scale with anchors at 0 (Does not interfere) and 10 (Completely interferes). The instrument was scored by item and by dimension, with lower scores indicated less pain or pain interference.	Baseline, Week 8, 16
Change From Baseline in Patient's Global Assessment (PGA) of Diabetic Peripheral Neuropathy (DPN) at Week 4, 8, 12 and 16	The PGA is a global evaluation that utilizes a 5-point Likert scale with a score of 1 being the best (very good: Asymptomatic and no limitation of normal activities) and a score of 5 being the worst (very poor: Very severe symptoms which are intolerable and inability to carry out all normal activities).	Baseline, Week 4, 8, 12, 16
Number of Participants With Improvement of at Least 2 Points in Patient's Global Assessment (PGA) of Diabetic Peripheral Neuropathy	The PGA is a global evaluation that utilizes a 5-point Likert scale with a score of 1 being the best (very good: Asymptomatic and no limitation of normal activities) and a score of 5 being the worst (very poor: Very severe symptoms which are intolerable and inability to carry out all normal activities).	Week 4, 8, 12, 16
Change From Baseline in Euro Quality of Life (EQ-5D)- Health State Profile Utility at Week 16	EQ-5D: participant rated questionnaire to assess health-related quality of life in terms of a single utility score. Health State Profile component assesses level of current health for 5 domains: mobility, self-care, usual activities, pain or discomfort, and anxiety or depression; 1 indicates better health state (no problems); 3 indicates worst health state (extreme problems). Scoring formula developed by Euro Quality of life group assigns a utility value for each domain in the profile. Score is transformed and results in a total score range -0.594 to 1.000; higher score indicated a better health state.	Baseline, Week 16
Time to Discontinuation Due to Lack of Efficacy		Baseline up to Week 16
Number of Participants Who Used Rescue Medication	Participants who did not experience adequate pain relief for DPN pain during the treatment period took acetaminophen 3000 mg/day up to 3 days/week as rescue medication.	Week 1, 2, 4, 6, 8, 12, 16
Days Per Week of Rescue Medication Usage	Participants who did not experience adequate pain relief for DPN pain during the treatment period took acetaminophen 3000 mg/day up to 3 days/week as rescue medication.	Week 1, 2, 4, 6, 8, 12, 16
Amount of Rescue Medication Taken	Participants who did not experience adequate pain relief for DPN pain during the treatment period took acetaminophen 3000 mg/day up to 3 days/week as rescue medication.	Week 1, 2, 4, 6, 8, 12, 16
Number of Participants With Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)	An AE was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. An SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. Treatment-emergent are events between first dose of study drug and up to 112 days after last dose that were absent before treatment or that worsened relative to pretreatment state.	Baseline up to 112 days after last dose of study treatment (up to 169 days)
Number of Participants With Clinically Significant Laboratory Values	Criteria:Hemoglobin(Hgb),hematocrit,red blood cell(RBC)count:less than(<)0.8*lower limit of normal(LLN), mean cell Hgb,mean corpuscular volume,mean corpuscular Hgb concentration,mean platelet volume:<0.9*LLNor>1.1*upper limit of normal(ULN),platelet:<0.5*LLN >1.75* ULN, lymphocyte,neutrophil:<0.8*LLN or>1.2*ULN,basophil, eosinophil,monocyte:>1.2*ULN;bilirubin(total, direct,)>1.5*ULN, aspartate and alanine aminotransferase,alkaline phosphatase:> 3.0*ULN;gamma GT>3.0;cholestrol,triglycerides:>1.3*ULN; total protein, albumin:<0.8*LLN or>1.2*ULN ;blood urea nitrogen,creatinine:>1.3*ULN,uric acid>1.2*ULN;sodium <0.95*LLNor>1.05*ULN,potassium,chloride,calcium,bicarbonate, magnesium:<0.9*LLN or >1.1*ULN;phosphate<0.8*LLN or>1.2*ULN;glucose <0.6*LLNor>1.5*ULN,glycosylated Hgb>1.3*ULN,creatine kinase >2.0*ULN;urine(specific gravity<1.003or>1.030;pH <4.8or>8;glucose,ketone,proteins,blood/Hgb,bilirubin,nitrite>=1;WBC, RBC≥20/HPF;hyaline cast≥1;epithelial cell>=6;bacteria >1);serum pregnancy >=1.	Baseline up to Week 24
Number of Participants With Clinically Significant Electrocardiogram (ECG) Abnormalities	Following parameters were analyzed for ECG abnormality: PR interval, QRS interval, QT interval, QT interval corrected using the Fridericia's formula (QTcF), QT interval corrected using the Bazett's formula (QTcB), RR interval and heart rate (HR). Number of participants with clinically significant abnormal ECG findings reported as adverse events were presented.	Baseline up to Week 24
Number of Participants With Clinically Significant Change From Baseline Physical Examination	Physical examination included examination of following sites in addition to general examination: abdomen, ears, extremities, eyes, head, heart, musculoskeletal, neck, nose, skin, throat, lungs and thyroid.	Baseline up to Week 24
Number of Participants With Clinically Significant Vital Signs Abnormalities	Following parameters were analyzed for examination of vital signs: body temperature, blood pressure, pulse rate and respiratory rate. Number of participants with clinically significant abnormality in vital signs reported as adverse events were presented.	Baseline up to Week 24
Number of Participants With Anti Drug Antibody (ADA) for Tanezumab	Human serum ADA samples were analyzed for the presence or absence of anti-tanezumab antibodies by using the semi-quantitative enzyme-linked immunosorbent assay (ELISA).	Baseline, Week 8, 16, 24
Change From Baseline in Neuropathy Impairment Score (NIS) at Weeks 2, 4, 8, 12, 16 and 24: Last Observation Carried Forward (LOCF)	Neurologic examination assessed strength of groups of muscles of the head and neck, upper limbs and lower limbs, deep tendon reflexes and sensation (tactile, vibration, joint position sense and pin prick) of index fingers and great toes in order to complete the NIS. The NIS consists of 74 items (37 items assessed on the right side and 37 items assessed on the left side). Each item was rated on a scale of either 0 to 4 or 0 to 2 points, which were summed to calculate a total score. The NIS total score ranges from 0 to 244, where higher scores represent greater impairment.	Baseline, Weeks 2, 4, 8, 12, 16 and 24
Change From Baseline Neuropathy Symptoms and Change (NSC) Score at Week 16: Last Observation Carried Forward (LOCF)	The NSC (Neuropathy symptoms and change) is a standardized instrument and has been used to evaluate participants for number of symptoms of peripheral neuropathy. The NSC score included 38 (muscle weakness, Q1-19; sensation, Q20-29; and autonomic symptoms, Q30-38) symptom questions where the participants indicated experiencing the number of symptoms (to any severity). The score ranged from 0 to 38, with higher scores indicated more symptoms. The change score is the participant's comparison of the symptoms at last evaluation to the symptoms at onset. A change from baseline > 0 indicated increased neuropathy.	Baseline, Week 16
Change From Baseline in Quantitative Sensory Testing (QST) at Week 16	QST was performed on dorsum of foot and anterior thigh (at midpoint of a line from inguinal crease to midpoint of patella) to assess and quantify sensory function in lower extremity. Parameters were selected to assess small fiber function such as cooling detection threshold (mainly small diameter myelinated fibers, A delta), heat pain detection threshold (A delta and C fiber functions), and large fiber function via vibration detection threshold. normal deviate scores derived from a normal distribution of a reference population. A standard deviate score of 0 corresponds to 50th percentile of control population. Standard deviate score 1.96 corresponds to 95th percentile of normal distribution and -1.96 corresponds to 5th percentile of normal distribution. A normal deviate score indicated how many standard deviations higher (in case of positive normal deviate score) or lower (in case of negative normal deviate score) participant's value was relative to mean of reference population.	Baseline, Week 16
Change From Baseline in the Average Density of Protein Gene Product (PGP) 9.5-Positive Intraepidermal Nerve Fiber (IENF) at Week 16: LOCF	IENF density was quantified in 3 millimeter (mm) immunostained skin punch biopsies containing epidermis and superficial dermis to evaluate the amount and morphological appearance of small diameter nerve fibers, both somatic and autonomic, in sensory neuropathies. IENF density was assessed from skin biopsies taken from the distal calves and distal thigh.	Baseline, Week 16
Plasma Tanezumab Concentration		Baseline(Day 1), Week 2, 4, 8, 12, 16, 24
Serum Nerve Growth Factor (NGF)	Serum samples were analyzed for determining total NGF concentration. Total NGF was analyzed using a validated, sensitive and specific immunoaffinity enrichment liquid chromatography tandem mass spectrometric (IA/LC/MS/MS) method.	Day 1, Week 8, 16, 24

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants With Subcutaneous Doses of Study Medication	Number of participants are reported based on the maximum number of Subcutaneous doses of either tanezumab or placebo received.	Day 1 up to Week 8

Collaborators and Investigators

• Sponsor: Pfizer

Publications and helpful links

General Publications

• Bramson C, Herrmann DN, Carey W, Keller D, Brown MT, West CR, Verburg KM, Dyck PJ. Exploring the role of tanezumab as a novel treatment for the relief of neuropathic pain. Pain Med. 2015 Jun;16(6):1163-76. doi: 10.1111/pme.12677. Epub 2015 Jan 16.

Helpful Links

• To obtain contact information for a study center near you, click here.

Study record dates

Study Major Dates

• Study Start (Actual): March 30, 2010
• Primary Completion (Actual): November 18, 2010
• Study Completion (Actual): July 6, 2011

Study Registration Dates

• First Submitted: March 11, 2010
• First Submitted That Met QC Criteria: March 12, 2010
• First Posted (Estimate): March 16, 2010

Study Record Updates

• Last Update Posted (Actual): February 24, 2021
• Last Update Submitted That Met QC Criteria: February 22, 2021
• Last Verified: February 1, 2021

More Information

Terms related to this study

• Keywords: diabetic peripheral neuropathy; tanezumab; diabetic neuropathies; diabetic polyneuropathy; diabetic neuropathy painful
• Additional Relevant MeSH Terms: Nervous System Diseases; Endocrine System Diseases; Diabetes Complications; Diabetes Mellitus; Neuromuscular Diseases; Peripheral Nervous System Diseases; Diabetic Neuropathies; Physiological Effects of Drugs; Peripheral Nervous System Agents; Analgesics; Sensory System Agents; Tanezumab
• Other Study ID Numbers: A4091031; DPN PHASE 2B (Other Identifier: Alias Study Number)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.