Trial record 7 of 7 for:    UCHL1

Effect of NGX-4010 on ENFD and Sensory Function

This study has been completed.
Sponsor:
Information provided by:
NeurogesX
ClinicalTrials.gov Identifier:
NCT00254449
First received: November 14, 2005
Last updated: February 12, 2009
Last verified: September 2007
  Purpose

The purpose of this study is to evaluate epidermal nerve fiber (ENF) regeneration and normalization of peripheral sensory nerve function over time in normal healthy volunteers following a 60 minute application of Capsaicin Dermal Patch (NGX 4010; capsaicin 640 mcg/cm2) as compared to comparable untreated skin areas (control).The objectives of this study are: 1) To assess the difference between patch-treated and comparable untreated skin areas (control) in ENFD as quantified by PGP 9.5 immunohistochemical staining of skin biopsy samples obtained at 1, 12 and 24 weeks following a 60 minute application; 2) To assess the difference between patch-treated and comparable untreated skin areas (control) for thermal detection thresholds as assessed by QST at 1, 12 and 24 weeks following a 60 minute application; and, 3) To assess the difference between patch-treated and comparable untreated skin areas (control) in mechanical (sharp pain) sensation and tactile threshold at 1, 12 and 24 weeks following a 60 minute application.


Condition Intervention Phase
Human Volunteers
Drug: NGX-4010
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Randomized, Controlled, Open-Label Study to Investigate the Effect of NGX-4010 on Epidermal Nerve Fiber Density and Sensory Function in Healthy Volunteers

Resource links provided by NLM:


Further study details as provided by NeurogesX:

Primary Outcome Measures:
  • Mean ENFD in the patch-treated and comparable untreated skin areas (control) at 1, 12 and 24 weeks after exposure.
  • Mean just noticeable difference (JND) values for thermal perception QST in the patch-treated and comparable untreated skin areas (control) at 1, 12 and 24 weeks after exposure.
  • Mean difference in mechanical (sharp pain) sensation and tactile threshold between patch-treated and comparable untreated skin areas (control) at 1, 12 and 24 weeks after exposure.

Estimated Enrollment: 36
Study Start Date: November 2005
Estimated Study Completion Date: May 2006
Detailed Description:

This is a randomized, controlled, open-label, single center, phase 1 study in normal healthy volunteers. Each subject will have a 60 minute exposure to two 5.0 × 5.5 cm NGX-4010 patches. In addition, two 5.0 × 5.5 cm comparable untreated control skin areas will be identified and evaluated. At baseline and prior to skin punch biopsy at Weeks 1 (± 1 day), 12 (± 3 days) and 24 (± 7 days), QST of patch-treated and untreated control skin areas will be performed and evaluated. QST for cooling detection threshold and heat-pain threshold, and assessment of mechanical (sharp pain) sensation and tactile threshold will be performed at each of the two patch-treated and two untreated control skin areas. Serial skin punch biopsies of patch-treated and untreated control skin areas will be obtained and evaluated at Weeks 1 (± 1 day), 12 (± 3 days), and 24 (± 7 days). Skin at the patch-treated and untreated control skin areas will be anesthetized with subcutaneous 1% lidocaine, and then three millimeter (mm) skin biopsies will be obtained with a sterile punch tool from each of the designated areas. Biopsy specimens will be fixed overnight, then cryoprotected in a phosphate buffered solution until processed. Thick sections will be cut and immunostained for localization and quantification of nerve fibers in the epidermis and visualization of the subepidermal plexus using antibodies to PGP 9.5. Antibodies to type IV collagen will be used to identify the basement membrane and superficial blood vessels in the biopsy microsections. Vital signs and adverse events (AEs) will be collected at each visit. Clinical laboratory tests will be performed at the Screening Visit and at the Termination Visit (Week 24).

  Eligibility

Ages Eligible for Study:   18 Years to 40 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • 18 to 40 years of age.
  • Male and female subjects. (Half of the subjects enrolled must be male.)
  • Be in good health.
  • Have intact, unscarred skin over the thighs.
  • Agree not to use topically-applied products containing nonsteroidal antiinflammatory drugs, menthol, methyl salicylate, local anesthetics, steroids or capsaicin anywhere on the thighs for the duration of the study.
  • Female subjects must not be breast-feeding and must have a negative serum beta human chorionic gonadotropin (hCG) pregnancy test performed within 7 days prior to the Study Patch Application Visit (Day 0).
  • All subjects must be willing to use effective methods of birth control and/or refrain from participating in a conception process during the study and for 30 days following experimental drug exposure.
  • Willing and able to comply with protocol requirements for the duration of study participation. Requirements include but are not limited to attending all study visits and refraining from extensive travel during study participation.
  • Subjects must sign an informed consent form for this study approved by the Investigator's Institutional Review Board (IRB).

Exclusion Criteria:

  • Any dermatological condition(s) that in the judgment of the Principal Investigator has the potential to disrupt skin integrity or alter sensory function on the thighs.
  • Any skin infection, skin irritation (e.g., poison oak), trauma or burn (including sunburn) on the thighs within 30 days preceding the Study Patch Application Visit (Day 0).
  • Any medical history of painful conditions, surgery, or injury involving or affecting the thighs, including but not limited to prior orthopedic surgery, lumbosacral disc disease, sciatica, and hip or femur fracture.
  • Any medical history of known or suspected body system abnormalities, including but not limited to diabetes, hypothyroidism, asthma or any form of peripheral or central nervous system disease.
  • Use of any systemic medications that interact with the peripheral nervous system, including beta adrenergic blockers, alpha adrenergic blockers, anticonvulsant drugs, antidepressant drugs or opioids within 30 days prior to the Study Patch Application Visit (Day 0).
  • Use of any topically-applied product including prescription or over the-counter (OTC) analgesic creams/lotions/patches, nonsteroidal antiinflammatory drugs, local anesthetics, steroids or capsaicin on the thighs within 30 days preceding the Study Patch Application Visit (Day 0).
  • Currently taking any prescription medication except for oral, transdermal or injected contraceptives.
  • Requirement for ongoing or periodic pain medication for any chronic or recurrent medical condition.
  • Participation in another drug research study within 30 days preceding the Study Patch Application Visit (Day 0).
  • Diagnosis of human immunodeficiency virus (HIV) infection, according to medical history and/or self-report.
  • History or current substance abuse including alcoholism/alcohol abuse, as judged by the investigator.
  • Positive test result on the urine drug screen for opioids, cannabis, phencyclidine (PCP), cocaine and amphetamines performed at the Screening Visit.
  • History of hypersensitivity to capsaicin (i.e., chili peppers or OTC capsaicin products), local anesthetics including lidocaine or adhesives.
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00254449

Locations
United States, Minnesota
NeurogesX Investigational Site
Minneapolis, Minnesota, United States, 55455
Sponsors and Collaborators
NeurogesX
Investigators
Study Director: Jeffrey Tobias, MD NeurogesX
Principal Investigator: William R. Kennedy, MD University of Minnesota - Clinical and Translational Science Institute
  More Information

No publications provided by NeurogesX

Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
ClinicalTrials.gov Identifier: NCT00254449     History of Changes
Other Study ID Numbers: C115
Study First Received: November 14, 2005
Last Updated: February 12, 2009
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Capsaicin
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Pharmacologic Actions
Antipruritics
Dermatologic Agents
Therapeutic Uses

ClinicalTrials.gov processed this record on July 23, 2014