Exenatide for Smoking Cessation and Prevention of Weight Gain

Sponsor

The University of Texas Health Science Center, Houston (Other)

Overall Status

Not yet recruiting

CT.gov ID

NCT05610800

Collaborator

(none)

216

Enrollment

Location

Arms

Anticipated Duration (Months)

5.1

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The purpose of this study is to determine if exenatide improves end-of-treatment smoking abstinence rates and to determine if exenatide mitigates post-cessation weight gain.

Condition or Disease	Intervention/Treatment	Phase
Smoking Cessation Weight Gain	Drug: Exenatide 2 milligram (mg) Injection Drug: Placebo Drug: Nicotine patch Behavioral: Smoking Cessation Counseling	Phase 2

Study Design

Study Type:

Interventional

Anticipated Enrollment :

216 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Masking:

Double (Participant, Investigator)

Primary Purpose:

Treatment

Official Title:

A Randomized Controlled Trial of Exenatide as an Adjunct to Nicotine Patch for Smoking Cessation and Prevention of Post-Cessation Weight Gain

Anticipated Study Start Date :

Nov 1, 2022

Anticipated Primary Completion Date :

Mar 1, 2026

Anticipated Study Completion Date :

May 1, 2026

Arms and Interventions

Arm	Intervention/Treatment
Active Comparator: Exenatide, NRT, and Smoking Cessation Counseling Participants will receive once weekly exenatide injections, daily nicotine patches (NRT), and once weekly individual smoking cessation counseling sessions.	Drug: Exenatide 2 milligram (mg) Injection Exenatide will be purchased commercially as Bydureon for subcutaneous (SC) injection and administered at a dose of 2 mg once a week for a total of 14 weeks. Each single-dose, dual-chamber pen contains 0.65 mg of diluent and 2 mg of exenatide, which remains isolated until mixed. Other Names: Bydureon Drug: Nicotine patch Nicotine patches will be purchased commercially and dispensed during clinic visits for one week of use. Participants who smoke >10 cigarettes/day will receive 21 mg patches for the first 12 weeks, 14 mg patches for week 13, and 7 mg patches for week 14. Participants who smoke 5-10 cigarettes per day will receive 14 mg patches for the first 12 weeks and 7 mg patches for weeks 13 and 14. Behavioral: Smoking Cessation Counseling Participants will receive brief individual behavioral smoking cessation counseling that consist of weekly in-person sessions and 2 brief (10-15 min) supportive phone calls (once pre-quit and again 3-days post-quit), spanning the 14-week active treatment phase. Counseling will be provided by master's level clinicians who will receive at least 8 hours of initial training.
Placebo Comparator: Placebo, NRT, and Smoking Cessation Counseling Participants will receive once weekly saline injections, daily nicotine patches (NRT), and once weekly individual smoking cessation counseling sessions.	Drug: Placebo Sterile saline (0.9%) will serve as the placebo for exenatide. The placebo will be administered 2 mg subcutaneously using insulin syringes. Drug: Nicotine patch Nicotine patches will be purchased commercially and dispensed during clinic visits for one week of use. Participants who smoke >10 cigarettes/day will receive 21 mg patches for the first 12 weeks, 14 mg patches for week 13, and 7 mg patches for week 14. Participants who smoke 5-10 cigarettes per day will receive 14 mg patches for the first 12 weeks and 7 mg patches for weeks 13 and 14. Behavioral: Smoking Cessation Counseling Participants will receive brief individual behavioral smoking cessation counseling that consist of weekly in-person sessions and 2 brief (10-15 min) supportive phone calls (once pre-quit and again 3-days post-quit), spanning the 14-week active treatment phase. Counseling will be provided by master's level clinicians who will receive at least 8 hours of initial training.

Arm

Intervention/Treatment

Active Comparator: Exenatide, NRT, and Smoking Cessation Counseling

Participants will receive once weekly exenatide injections, daily nicotine patches (NRT), and once weekly individual smoking cessation counseling sessions.

Drug: Exenatide 2 milligram (mg) Injection

Exenatide will be purchased commercially as Bydureon for subcutaneous (SC) injection and administered at a dose of 2 mg once a week for a total of 14 weeks. Each single-dose, dual-chamber pen contains 0.65 mg of diluent and 2 mg of exenatide, which remains isolated until mixed.

Other Names:

Bydureon

Drug: Nicotine patch

Nicotine patches will be purchased commercially and dispensed during clinic visits for one week of use. Participants who smoke >10 cigarettes/day will receive 21 mg patches for the first 12 weeks, 14 mg patches for week 13, and 7 mg patches for week 14. Participants who smoke 5-10 cigarettes per day will receive 14 mg patches for the first 12 weeks and 7 mg patches for weeks 13 and 14.

Behavioral: Smoking Cessation Counseling

Participants will receive brief individual behavioral smoking cessation counseling that consist of weekly in-person sessions and 2 brief (10-15 min) supportive phone calls (once pre-quit and again 3-days post-quit), spanning the 14-week active treatment phase. Counseling will be provided by master's level clinicians who will receive at least 8 hours of initial training.

Placebo Comparator: Placebo, NRT, and Smoking Cessation Counseling

Participants will receive once weekly saline injections, daily nicotine patches (NRT), and once weekly individual smoking cessation counseling sessions.

Drug: Placebo

Sterile saline (0.9%) will serve as the placebo for exenatide. The placebo will be administered 2 mg subcutaneously using insulin syringes.

Drug: Nicotine patch

Behavioral: Smoking Cessation Counseling

Outcome Measures

Primary Outcome Measures

Percentage of participants with 4-week continuous abstinence at 12 weeks post-target quit day as assessed by self-report timeline followback (TLFB) and verified by breath carbon monoxide (CO) level [Week 15]
Abstinence is defined as no smoking, not even a puff, as reported on TLFB between weeks 11 through 14 and biochemically verified (CO ≤ 5 ppm) at each visit.
Weight change in kilograms at 12 weeks post-target quit day [Baseline, Week 15]

Secondary Outcome Measures

Percentage of participants with 4-week continuous abstinence at 24 weeks post-target quit day as assessed by self-report timeline followback (TLFB) and verified by breath carbon monoxide (CO) level [Week 26]
Abstinence is defined as no smoking, not even a puff, as reported on TLFB between weeks 22 through 25 and biochemically verified (CO ≤ 5 ppm) at Week 26.
Weight change in kilograms at 24 weeks post-target quit day [Baseline, Week 26]
Change in amplitude of the late positive potential evoked by visual stimuli [Week 1, Week 3]

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years to 75 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

Be willing and able to sign and date an informed consent form, willing to comply with all study procedures, and be available for the duration of the study
Male or female, 18-75 years of age
Have been smoking ≥5 cigarettes per day for at least 1 year and provide positive cotinine test
Desire to quit smoking (defined as "intend to quit within one month")
Have HbA1C levels between 5.7 and 6.4% and/or a body mass index of ≥25 kg/m2
Have vital signs as follows: resting pulse between 50 and 95 bpm, BP between 90-150 mmHg systolic and 45-95 mmHg diastolic
Have hematology and chemistry laboratory tests that are within reference limits (±10%), with the following exception: pancreatic tests (lipase and amylase) must be within normal limits
Agree (if the subject is female and of child-bearing potential) to use at least one of the following methods of birth control from time of the first administration of the study medication to at least 7 days post the last dose of the study medication, unless the partner is surgically sterile (underwent vasectomy): oral contraceptives, contraceptive sponge, patch, double barrier (diaphragm/spermicidal or condom/spermicidal), intrauterine contraceptive system, etonogestrel implant, medroxyprogesterone acetate contraceptive injection, hormonal vaginal contraceptive ring, or complete abstinence from sexual intercourse.
Women of child-bearing potential must provide negative urine pregnancy tests prior to randomization
Have a medical history and a brief physical examination demonstrating no clinically significant contraindications for study participation, in the judgment of the Study Physician and the PI.

Exclusion Criteria:

Psychoactive substance abuse or dependence (excluding nicotine dependence) within the past 3 months (existing diagnosis or as determined by the structured interview)
Currently using chewing tobacco, snuff, snus or electronic cigarettes
Currently enrolled in a smoking cessation program/research study or using pharmacotherapy for smoking cessation (NRT, varenicline, or bupropion)
Currently enrolled in a behavioral weight management plan/research study, or taking medication used for weight management (i.e., orlistat, lorcaserin,*naltrexone-bupropion, liraglutide, phentermine, benzhetamine, diethylpropion, phendimetrazine), or medication known to impact weight (i.e., corticosteroids) *Note: Withdrawn from the market in Feb 2020, but some patients may still be taking it
Currently using oral or injectable glucose lowering medications
Urine drug test positive, before randomization, for any of the following substances: benzodiazepines, cocaine, opioids,*amphetamines, methamphetamine, buprenorphine, barbiturates, 3,4-methylenedioxy-methamphetamine (MDMA), and/or THC. *Note: If positive for opioids or oxycodone but recent opioid use for acute pain is reported by the study candidate, then the candidate can be included at the discretion of the Primary Investigator and/or Study Physician
Psychotic or bipolar disorder, or mood disorder with psychotic features, or eating disorder (existing diagnosis or as determined by the structured interview)
Moderate to high risk for suicidality (as determined by the structured interview)
Personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN2)
Type 1 or type 2 diabetes mellitus (previously diagnosed or indicated by HbA1C level of ≥6.5%)
Severe cardiovascular disease (history of myocardial infarction, life-threatening arrhythmia, or worsening angina pectoris)
Severe gastrointestinal disease (i.e., severe gastroparesis)
Previous history of pancreatitis or risk of pancreatitis
Creatinine clearance <45 mL/min or end stage renal disease (ESRD)
Previous medically adverse reaction to the study medications or nicotine
Women who are currently pregnant, or plan to become pregnant, or lactating, or of childbearing potential and are not using medically accepted forms of contraception. Medically accepted forms of contraception are specified in the inclusion criterion 8.
Current, anticipated, or pending enrollment in another research study over the next 6 months that could potentially affect subject safety and/or the study data/design as determined by the PI and/or Study Physician
Unable to communicate (read, write, and speak) fluently in English
Have any illness or condition which in the opinion of the PI and/or the Study Physician would preclude safe and/or successful completion of the study.