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Nicotine Vaccination and Nicotinic Receptor Occupancy

This study has been completed.
Nabi Biopharmaceuticals
National Institute on Drug Abuse (NIDA)
Information provided by (Responsible Party):
Yale University Identifier:
First received: October 14, 2009
Last updated: November 19, 2015
Last verified: November 2015

This is a molecular imaging research study designed to examine how much nicotine gets into the brain before and after vaccination with NicVAX, a nicotine vaccine developed by Nabi Biopharmaceuticals. NicVAX (Nicotine Conjugate Vaccine) is an investigational vaccine designed as an aid to smoking cessation and long-term abstinence, as well as an aid to prevent relapses of a treated smoker.

In this project we want to understand the degree to which NicVAX administration changes how much nicotine enters the brain in smokers.

Condition Intervention Phase
Nicotine Dependence
Biological: NicVAX
Radiation: [123I]5-IA-85380
Drug: Nicotine bitartrate
Phase 2

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Health Services Research
Official Title: 123I-5-IA SPECT Imaging of Nicotinic Receptors and Effects of Nicotine Vaccine

Resource links provided by NLM:

Further study details as provided by Yale University:

Primary Outcome Measures:
  • Mean of the Average Nicotine Binding % at Scan 1 and Scan 2 [ Time Frame: 3 months ]
    nAchR levels from baseline and after immunization with 3'-AmNic-rEPA (NicVAX=vaccine) SPECT images obtained in healthy control smoking subjects at baseline and after immunization with 3'-AmNic-rEPA (NicVAX=vaccine). nAchR levels will be determined by radioligand uptake in SPECT images. Means were calculated for all subjects at scan 1 and scan 2.

Enrollment: 14
Study Start Date: September 2009
Study Completion Date: February 2011
Primary Completion Date: February 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Healthy Smoker
There is only one arm to the study. All subjects will receive NicVax, [123I]5-I-A-85380,and Nicotine bitartrate.
Biological: NicVAX
1.0 mL of Nicotine Conjugate Vaccine(x4), I.M. at 3 week intervals between SPECT studies
Other Name: Nicotine Conjugate Vaccine
Radiation: [123I]5-IA-85380
up to 10 mCi of [123I]5-IA-85380, I.V. on each of two SPECT Scan days
Other Name: 5-IA
Drug: Nicotine bitartrate
0.5-1.5 mg of Nicotine bitartrate, I.V. on each of two SPECT Scan days
Other Name: IV nicotine

Detailed Description:
The purpose of the present study is to examine the occupancy of brain β2-containing nicotinic acetylcholine receptors (β2-nAChR) by nicotine both at baseline and following administration of a nicotine vaccine. The number of brain β2-nAChR and the amount of nicotine occupancy both before and after vaccination will be measured using the nicotinic agonist [123I]5-IA-85380 ([123I]5-IA) and single photon emission computed tomography (SPECT). [123I]5-IA will be administered using the bolus plus constant infusion paradigm to smokers abstinent for 4-9 days (time period necessary for nicotine and pharmacological active metabolites to clear from brain). Three baseline SPECT images will be obtained after equilibrium has been reached (~6 hours into the [123I]5-IA infusion). Then, IV nicotine will be administered (0.5-1.5 mg/70 kg will be infused over 10 minutes). Following a series of 4 nicotine vaccine shots, the same procedure will be repeated for a second [123I]5-IA scan day. We hypothesize that occupancy of β2-nAChR will be significantly lower, and take longer to plateau, following nicotine vaccine administration.

Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Current smoker who smokes at least 10-25 cigarettes a day
  • Good general health

Exclusion Criteria:

  • Subjects with a pacemaker or other ferromagnetic material in body.
  • Prior exposure to NicVAX or any other nicotine vaccine.
  • Use of systemic steroids or other immunosuppressive agent
  • History of significant neurological, cardiovascular, hepatic, endocrine, renal, liver, psychiatric or thyroid illness
  • Cancer or cancer treatment in last 5 years
  • HIV infection
  • Use of varenicline (Chantix), bupropion (Wellbutrin, Zyban), mecamylamine (Inversin), within 30 days prior to administration of NicVAX and for the duration of the study.
  • Inability to fulfill all visits and examination procedures for approximately 20 weeks.
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Please refer to this study by its identifier: NCT00996034

United States, Connecticut
Veterans Association Connecticut Hospital System
West Haven, Connecticut, United States, 06516
Sponsors and Collaborators
Yale University
Nabi Biopharmaceuticals
National Institute on Drug Abuse (NIDA)
Principal Investigator: Irina Esterlis, Ph.D. Yale University
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Yale University Identifier: NCT00996034     History of Changes
Other Study ID Numbers: 0804003655
R21DA024388 ( US NIH Grant/Contract Award Number )
Study First Received: October 14, 2009
Results First Received: September 12, 2012
Last Updated: November 19, 2015

Keywords provided by Yale University:
Nicotine, SPECT, vaccine, receptor

Additional relevant MeSH terms:
Tobacco Use Disorder
Substance-Related Disorders
Chemically-Induced Disorders
Mental Disorders
Immunologic Factors
Physiological Effects of Drugs
Ganglionic Stimulants
Autonomic Agents
Peripheral Nervous System Agents
Nicotinic Agonists
Cholinergic Agonists
Cholinergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action processed this record on April 27, 2017