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Safety, Tolerability and Pharmacokinetics of Multiple Doses of AV-101 in Healthy Volunteers

Primary Purpose

Neuropathic Pain

Status
Completed
Phase
Phase 1
Locations
United States
Study Type
Interventional
Intervention
AV-101
Placebo
Sponsored by
VistaGen Therapeutics, Inc.
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Neuropathic Pain focused on measuring Neuropathic Pain, Capsaicin Induced Pain

Eligibility Criteria

21 Years - 60 Years (Adult)All SexesAccepts Healthy Volunteers

Inclusion Criteria:

  • A subject will be eligible for participation in the full study only if all of the following criteria are met:

    1. Be male or female, aged 21 to 60 years inclusive, healthy, able and willing to provide written informed consent to participate in the study.
    2. Be able to read and speak English sufficiently to understand and follow the study instructions, including completion of pain intensity rating scales.
    3. For males, must use birth control (condom) to prevent fathering children; for females must be nonlactating, not pregnant, and using a reliable contraception method (e.g., abstinence, intrauterine device, hormonal birth control, or double barrier method [male condom, female condom, or diaphragm plus a spermicidal agent such as contraceptive foam, jelly, or cream]).
    4. Have a visual analog pain score of at least 4 out of 10 at screening.

Exclusion Criteria:

  • Subjects will be excluded from the study if any one or more of the following conditions apply:

    1. History of peripheral neuropathy or any chronic pain condition.
    2. History of significant hepatic, ophthalmic (including previous or current cataract), cardiovascular, renal, gastrointestinal, hematological, neurological, endocrine (including diabetes), metabolic, pulmonary, or psychiatric disease. Significance will be determined by the principal investigator.
    3. Clinically significant abnormality on the screening electrocardiogram that in the judgment of the investigator would place the subject at risk of cardiac adverse event as a result of capsaicin injection or administration of AV-101.
    4. Cognitive or psychiatric disorders that may diminish compliance with study procedures.
    5. Dermatopathology, skin hypersensitivity, or skin lesions in the areas of capsaicin application.
    6. Allergy to capsaicin or the study medication.
    7. Current tobacco use.
    8. Use of chemotherapy agents or history of cancer, other than resolved skin cancer, within 5 years before the screening visit.
    9. History of drug or alcohol abuse within 1 year before screening.
    10. History of AIDS, testing as HIV positive, or use of antiretroviral therapy.
    11. Use of, within 4 weeks before study drug dosing, any investigational drug, any epidural or intrathecal agent, corticosteroids, topical anesthetics, topical analgesics, central alpha agents (e.g., clonidine), alpha blockers (e.g., praxosin, terazosin), beta blockers, calcium channel blockers, or ACE inhibitors.
    12. Use within 7 days before and during the entire period of study drug dosing of long-acting nonsteroidal anti-inflammatory drug (NSAIDs) such as piroxicam or naproxen.
    13. Use within 36 hours before and during the entire period of study drug dosing of NSAIDs, aspirin, acetaminophen, antihistamines, sympathomimetics (e.g., pseudoephedrine and ephedrine), caffeine or alcohol.

Sites / Locations

  • UCSD Medical Center

Arms of the Study

Arm 1

Arm 2

Arm Type

Experimental

Placebo Comparator

Arm Label

AV-101

microcrystalline cellulose

Arm Description

Subjects will be randomized into one of three dose cohorts (360, 1,080, and 1,440 mg) to receive a daily oral dose for 14 consecutive days. Each cohort will have 12 subjects on active drug and 4 subjects on placebo. --------------------------------------------------------------------------------

Subjects will be randomized into one of three cohorts (360, 1,080, and 1,440 mg) to receive a daily oral dose for 14 consecutive days. Each cohort will have 12 subjects on active drug and 4 subjects on placebo.

Outcomes

Primary Outcome Measures

Pharmacokinetics
To evaluate pharmacokinetics of three dose levels of orally-administered AV-101 given once a day for 14 days in healthy volunteers by measuring Cmax, half-life, Tmax, and AUC.
Safety
To evaluate the safety of three dose levels of orally-administered AV-101 given once a day for 14 days in healthy volunteers by evaluating the number of subjects with treatment-emergent adverse events and changes from baseline to end of study in vital signs, hematology, hepatic profile, renal profile, urinalysis, and clinical laboratory parameters.

Secondary Outcome Measures

Antihyperalgesic activity
To examine the antihyperalgesic effects of orally-administered, multiple doses of AV-101 in healthy volunteers by using the intradermal capsaicin model.

Full Information

First Posted
November 16, 2011
Last Updated
December 18, 2012
Sponsor
VistaGen Therapeutics, Inc.
Collaborators
Cato Research, National Institute on Drug Abuse (NIDA)
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1. Study Identification

Unique Protocol Identification Number
NCT01483846
Brief Title
Safety, Tolerability and Pharmacokinetics of Multiple Doses of AV-101 in Healthy Volunteers
Official Title
A Phase 1b, Single-Site, Randomized, Double-Blind,Placebo-Controlled, Dose-Escalation Study: Safety, Pharmacokinetics, and Antihyperalgesic Activity of Multiple Doses of AV-101 on Capsaicin-Induced Pain in Healthy Volunteers
Study Type
Interventional

2. Study Status

Record Verification Date
December 2012
Overall Recruitment Status
Completed
Study Start Date
December 2011 (undefined)
Primary Completion Date
September 2012 (Actual)
Study Completion Date
September 2012 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
VistaGen Therapeutics, Inc.
Collaborators
Cato Research, National Institute on Drug Abuse (NIDA)

4. Oversight

Data Monitoring Committee
No

5. Study Description

Brief Summary
This is a Phase 1b study involving multiple oral doses of AV-101 in healthy male and female subjects. The safety, pharmacokinetics, and antihyperalgesic effect of AV-101 on capsaicin-induced hyperalgesia will be assessed.
Detailed Description
Healthy subjects will be randomized into three dose cohorts (360, 1,080, and 1,440 mg) to receive daily oral doses of AV-101 for 14 consecutive days. Each cohort has 12 subjects on active drug and 4 subjects on placebo. Safety, PK, and antihyperalgesic effects of treatment with AV-101 will be assessed. At the screening visit between Day -28 and Day -7 before randomization, 250 μg of capsaicin will be intradermally delivered into the volar aspect of one forearm. Subjects must report a pain score of at least 4 out of 10 to qualify for the study. On Day 1 and Day 14 the following data are collected: (1) neurosensory testing (thermal sensation, thermal pain, touch, and mechanical pain) on the forearm; (2) neurocognitive evaluation; and (3) 12-lead electrocardiogram, blood pressure, heart rate, respiratory rate, and temperature. PK samples will be collected on Days 1, 2, 14, and 15. The capsaicin-induced pain will be assessed at screening, on Day 1, and Day 14. An intradermal injection of capsaicin into the forearm on Day 1 and Day 14 will be followed by the efficacy measures. On Day 1 before administration of the first dose, subjects will be given a paper diary to record daily self-administration of each dose, concomitant medications, and adverse events during the 14-day treatment period.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Neuropathic Pain
Keywords
Neuropathic Pain, Capsaicin Induced Pain

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 1
Interventional Study Model
Parallel Assignment
Masking
ParticipantInvestigator
Allocation
Randomized
Enrollment
50 (Actual)

8. Arms, Groups, and Interventions

Arm Title
AV-101
Arm Type
Experimental
Arm Description
Subjects will be randomized into one of three dose cohorts (360, 1,080, and 1,440 mg) to receive a daily oral dose for 14 consecutive days. Each cohort will have 12 subjects on active drug and 4 subjects on placebo. --------------------------------------------------------------------------------
Arm Title
microcrystalline cellulose
Arm Type
Placebo Comparator
Arm Description
Subjects will be randomized into one of three cohorts (360, 1,080, and 1,440 mg) to receive a daily oral dose for 14 consecutive days. Each cohort will have 12 subjects on active drug and 4 subjects on placebo.
Intervention Type
Drug
Intervention Name(s)
AV-101
Other Intervention Name(s)
L-4-Cl-KYN
Intervention Description
Placebo or AV-101 at 360 mg, 1080 mg, or 1440 mg will be dosed once daily for 14 consecutive days.
Intervention Type
Drug
Intervention Name(s)
Placebo
Other Intervention Name(s)
microcrystalline cellulose
Intervention Description
Placebo or AV-101 at 360 mg, 1080 mg, or 1440 mg will be dosed once daily for 14 consecutive days.
Primary Outcome Measure Information:
Title
Pharmacokinetics
Description
To evaluate pharmacokinetics of three dose levels of orally-administered AV-101 given once a day for 14 days in healthy volunteers by measuring Cmax, half-life, Tmax, and AUC.
Time Frame
PK samples will be collected at time 0, 0.5, 1.5, 2, 4, 6, 8, 12, and 24 hours post-dosing on Day 1 and Day 14.
Title
Safety
Description
To evaluate the safety of three dose levels of orally-administered AV-101 given once a day for 14 days in healthy volunteers by evaluating the number of subjects with treatment-emergent adverse events and changes from baseline to end of study in vital signs, hematology, hepatic profile, renal profile, urinalysis, and clinical laboratory parameters.
Time Frame
28 days
Secondary Outcome Measure Information:
Title
Antihyperalgesic activity
Description
To examine the antihyperalgesic effects of orally-administered, multiple doses of AV-101 in healthy volunteers by using the intradermal capsaicin model.
Time Frame
28-49 Days

10. Eligibility

Sex
All
Minimum Age & Unit of Time
21 Years
Maximum Age & Unit of Time
60 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria: A subject will be eligible for participation in the full study only if all of the following criteria are met: Be male or female, aged 21 to 60 years inclusive, healthy, able and willing to provide written informed consent to participate in the study. Be able to read and speak English sufficiently to understand and follow the study instructions, including completion of pain intensity rating scales. For males, must use birth control (condom) to prevent fathering children; for females must be nonlactating, not pregnant, and using a reliable contraception method (e.g., abstinence, intrauterine device, hormonal birth control, or double barrier method [male condom, female condom, or diaphragm plus a spermicidal agent such as contraceptive foam, jelly, or cream]). Have a visual analog pain score of at least 4 out of 10 at screening. Exclusion Criteria: Subjects will be excluded from the study if any one or more of the following conditions apply: History of peripheral neuropathy or any chronic pain condition. History of significant hepatic, ophthalmic (including previous or current cataract), cardiovascular, renal, gastrointestinal, hematological, neurological, endocrine (including diabetes), metabolic, pulmonary, or psychiatric disease. Significance will be determined by the principal investigator. Clinically significant abnormality on the screening electrocardiogram that in the judgment of the investigator would place the subject at risk of cardiac adverse event as a result of capsaicin injection or administration of AV-101. Cognitive or psychiatric disorders that may diminish compliance with study procedures. Dermatopathology, skin hypersensitivity, or skin lesions in the areas of capsaicin application. Allergy to capsaicin or the study medication. Current tobacco use. Use of chemotherapy agents or history of cancer, other than resolved skin cancer, within 5 years before the screening visit. History of drug or alcohol abuse within 1 year before screening. History of AIDS, testing as HIV positive, or use of antiretroviral therapy. Use of, within 4 weeks before study drug dosing, any investigational drug, any epidural or intrathecal agent, corticosteroids, topical anesthetics, topical analgesics, central alpha agents (e.g., clonidine), alpha blockers (e.g., praxosin, terazosin), beta blockers, calcium channel blockers, or ACE inhibitors. Use within 7 days before and during the entire period of study drug dosing of long-acting nonsteroidal anti-inflammatory drug (NSAIDs) such as piroxicam or naproxen. Use within 36 hours before and during the entire period of study drug dosing of NSAIDs, aspirin, acetaminophen, antihistamines, sympathomimetics (e.g., pseudoephedrine and ephedrine), caffeine or alcohol.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Ralph Snodgrass, PhD
Organizational Affiliation
VistaGen Therapeutics, Inc.
Official's Role
Study Director
Facility Information:
Facility Name
UCSD Medical Center
City
San Diego
State/Province
California
ZIP/Postal Code
92037
Country
United States

12. IPD Sharing Statement

Citations:
PubMed Identifier
29229209
Citation
Wallace M, White A, Grako KA, Lane R, Cato AJ, Snodgrass HR. Randomized, double-blind, placebo-controlled, dose-escalation study: Investigation of the safety, pharmacokinetics, and antihyperalgesic activity of l-4-chlorokynurenine in healthy volunteers. Scand J Pain. 2017 Oct;17:243-251. doi: 10.1016/j.sjpain.2017.05.004. Epub 2017 Jun 15.
Results Reference
derived

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Safety, Tolerability and Pharmacokinetics of Multiple Doses of AV-101 in Healthy Volunteers

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