RN624 In Adult Patients With Chronic Low Back Pain - Full Text View

Purpose

The primary objective of this study is to evaluate the analgesic efficacy of RN624 compared with placebo and compared with naproxen in the treatment of adult patients with chronic low back pain.

Condition	Intervention	Phase
Low Back Pain	Drug: Naproxen Drug: Placebo Drug: PF-04383119 (RN624)	Phase II

MedlinePlus related topics:

Back Pain

ChemIDplus related topics:

Naproxen Naproxen sodium

U.S. FDA Resources

Study Type:	Interventional
Study Design:	Treatment, Randomized, Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Parallel Assignment, Safety/Efficacy Study

Official Title:	Phase II Randomized, Double-Blind, Placebo And Active Controlled, Multicenter, Parallel Group Proof Of Concept Study Of The Analgesic Effects Of RN624 In Adult Patients With Chronic Low Back Pain

Further study details as provided by Pfizer:

Primary Outcome Measures:

change from Baseline to Week 6 in the daily Low Back Pain Intensity (LBPI) as measured by an 11-point Numeric Rating Scale (NRS) derived from the patient daily diary [ Time Frame: 6 weeks ] [ Designated as safety issue: No ]

Secondary Outcome Measures:

Change from Baseline to Weeks 1, 2, 4, 6, 8, and 12 in Patient's Global Assessment of Low Back Pain (disease activity) score. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Total duration of response as defined by days with a ≥30% and a ≥50% reduction from Baseline in the daily average LBPI NRS score. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Change from Baseline to Weeks 1, 2, 4, 8 and 12 in the LBPI NRS score derived from the patient daily diary. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Change from Baseline in average pain over Weeks 1 to 4, 1 to 8, 1 to 12, 5 to 8, and 5 to 12 in the LBPI NRS score derived from the patient daily diary. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Response as defined by a ≥30% and a ≥50% reduction from Baseline in the LBPI NRS score derived from the patient daily diary at Weeks 1, 2, 4, 6, 8, and 12. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Time to a ≥30% and a ≥50% reduction from Baseline in the daily average LBPI NRS score (sustained for a minimum of 4 consecutive days). [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Change from Baseline to Weeks 1, 2, 4, 6, 8 and 12 in the Modified Brief Pain Inventory-short form (mBPI-sf) scores for Worst Pain and Average Pain obtained at study visits. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Response as defined by a score of ≤2 in the mean daily average LBPI NRS score during Weeks 1, 2, 4, 6, 8, and 12 as derived from the daily patient e-diary. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Percent change from Baseline in the LBPI NRS score through Week 6. [ Time Frame: 6 weeks ] [ Designated as safety issue: No ]
Change from Baseline to Weeks 1, 2, 4, 6, 8, and 12 in Roland-Morris Disability Questionnaire total score. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Patient's Global Evaluation of Study Medication (treatment response) score at Weeks 1, 2, 4, 6, 8 and 12. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Response as defined by a ≥30% and a ≥50% reduction from Baseline in the daily average LBPI NRS score (sustained for a minimum of 4 consecutive days). [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
Change from Baseline to Weeks 1, 2, 4, 6, 8, and 12 in the mBPI-sf score for Pain. [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]

Estimated Enrollment:	275
Study Start Date:	July 2007
Estimated Study Completion Date:	September 2008
Estimated Primary Completion Date:	September 2008 (Final data collection date for primary outcome measure)

Arms	Assigned Interventions
Naproxen: Active Comparator	Drug: Naproxen Oral naproxen 500 mg twice daily for Weeks 1-12.
Placebo: Placebo Comparator	Drug: Placebo Single IV infusion of placebo on Day 1 and placebo for naproxen twice daily for Weeks 1-12.
RN624: Experimental	Drug: PF-04383119 (RN624) Single IV infusion of 200 micrograms/kg RN624 on Day 1

Eligibility

Ages Eligible for Study:	18 Years and older
Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	No

Criteria

Inclusion Criteria:

Male or female of any race, >18 years of age and have BMI ≤39 kg/m2
Present with duration of chronic low back pain of ≥3 months requiring regular use of analgesic medication (>4 days per week for the past month)
Primary location of low back pain is between the 12th thoracic vertebra and the lower gluteal folds, with or without radiation into the posterior thigh, classified as Category 1 or 2 according to the classification of the Quebec Task Force in Spinal Disorders
Must have a score of ≥4 for Low Back Pain Intensity (NRS) while on current treatment at Screening, and completes at least 4 daily pain diaries during the 5 days prior to Randomization, with an average Low Back Pain Intensity (NRS) score of ≥4

Exclusion Criteria:

Back pain due to visceral disorder (i.e. endometriosis) or Back pain due to recent major trauma (i.e. vertebral fracture, post-traumatic spondylolisthesis)
History of lumbosacral radiculopathy, spinal stenosis associated with neurological impairment, or neurogenic claudication
Osteoporotic compression fracture within the last 6 months
Known history of: Rheumatoid arthritis; Seronegative spondyloarthropathy (i.e., ankylosing spondylitis, psoriatic arthritis, reactive arthritis, inflammatory bowel disease-related arthropathy); Paget's disease of spine, pelvis or femur; Fibromyalgia; Tumors or infections of the spinal cord
Patients receiving acetaminophen only to manage their chronic low back pain
Any uncontrolled or untreated chronic disease

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00584870

Contacts


Contact: Pfizer CT.gov Call Center	1-800-718-1021

Show 34 Study Locations

Sponsors and Collaborators

Pfizer

Investigators


Study Director:	Pfizer CT.gov Call Center	Pfizer

More Information

To obtain contact information for a study center near you, click here. This link exits the ClinicalTrials.gov site

Responsible Party:	Pfizer, Inc. ( Director, Clinical Trials Disclosure Group )
Study ID Numbers:	A4091004
First Received:	December 21, 2007
Last Updated:	August 25, 2008
ClinicalTrials.gov Identifier:	NCT00584870
Health Authority:	United States: Food and Drug Administration

Study placed in the following topic categories:

Signs and Symptoms

Naproxen

Neurologic Manifestations

Low Back Pain

Pain

Back Pain

Additional relevant MeSH terms:

Anti-Inflammatory Agents

Molecular Mechanisms of Pharmacological Action

Nervous System Diseases

Physiological Effects of Drugs

Cyclooxygenase Inhibitors

Enzyme Inhibitors

Gout Suppressants

Pharmacologic Actions

Analgesics, Non-Narcotic

Sensory System Agents

Therapeutic Uses

Anti-Inflammatory Agents, Non-Steroidal

Analgesics

Peripheral Nervous System Agents

Antirheumatic Agents

Central Nervous System Agents

ClinicalTrials.gov processed this record on September 05, 2008

Sponsored by:	Pfizer
Information provided by:	Pfizer
ClinicalTrials.gov Identifier:	NCT00584870