Nicotinic Treatment of Post-Chemotherapy Subjective Cognitive Impairment: A Pilot Study

Phase 2

Completed

Conditions: Chemobrain
Chemo Fog
Chemo Brain
Chemotherapy-related Cognitive Impairment
Breast Cancer

Interventions: Drug: Transdermal nicotine
Other: Placebo Transdermal Patch

Registration Number: NCT02312934

Lead Sponsor: Vanderbilt University Medical Center

Brief Summary: The purpose of this study is to evaluate the use of a nicotine patch as a treatment for problems with attention, learning and memory in breast cancer patients who are 1-5 years post chemotherapy.

Detailed Description: Studies have suggested that chemotherapy treatment for breast cancer may change the way the brain functions. As a result, patients who receive chemotherapy for breast cancer may experience problems with their attention, learning, and memory that they did not have before receiving chemotherapy. The investigators have found that nicotine treatment can help other types of patients with similar difficulties with attention, learning, and memory. Nicotine is a naturally occurring substance found in tobacco and is known to interact with nerve cells in the brain that are important for functions like learning and memory, and has been studied in a number of disorders. This study is designed to test whether nicotine treatment is helpful for learning and memory problems after chemotherapy for breast cancer.

This study will be a randomized, placebo-controlled pilot study to evaluate the effect of transdermal nicotine to 1) reduce subjective complaints and 2) enhance cognitive performance on laboratory measures of cognitive performance in breast cancer patients with persistent chemotherapy-related cognitive impairment (CRCI), a condition also known as "chemo brain." Participants will be randomized to either placebo or active compound (50/50) for the 6-week treatment portion of the study. Participants will be assessed before, during, and at the end of treatment. At the end of the 8-week study, participants will have the option to take part in the open-label portion of the study for an additional 6 weeks.

Recruitment & Eligibility

Status: COMPLETED

Sex: Female

Target Recruitment: 22

Inclusion Criteria

All participants will:
1. Be between 35 and 80 years of age,
2. Have been diagnosed with noninvasive or invasive (Stage 1, 2, or 3A) breast cancer,
3. Have undergone treatment with systemic chemotherapy within the last 1-5 years,
4. Endorse persistent CRCI subjective complaints,
5. Be non-smokers (no nicotine use within the last 5 years),
6. Have no active cardiac, neurologic, or psychiatric illness, and
7. Fluent in and able to read English.

Exclusion Criteria

Participants will be excluded for:
1. Any active neurologic and/or psychiatric disease, history of significant head trauma followed by persistent neurologic deficits, or known structural brain abnormalities,
2. Current major depression or another major psychiatric disorder as described in DSM-5 (use of CNS active medications (e.g. antidepressants) will be permitted, provided dosing has been stable for at least 3 months),
3. Any history of alcohol or substance abuse or dependence within the past 2 years (DSM-5 criteria),
4. Any significant systemic illness or unstable medical condition which could lead to difficulty complying with the protocol including:
History of myocardial infarction in the past year or unstable, severe cardiovascular disease including angina or CHF with symptoms at rest, or clinically significant abnormalities on the ECG
Clinically significant and/or unstable pulmonary, gastrointestinal, hepatic, or renal disease
Insulin-requiring diabetes or uncontrolled diabetes mellitus,
Uncontrolled hypertension (systolic BP> 170 or diastolic BP> 100), 5. Use of any investigational drugs within 30 days or 5 half-lives, whichever is longer, prior to screening, and 6. Use of any drugs with pro-cholinergic properties (e.g. donepezil).

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Transdermal Nicotine	Transdermal nicotine	Nicotine will be delivered by a transdermal patch delivery system for topical application. Each patch will contain approximately 1.75mg nicotine/cm2, and releases 7, and 14mg of nicotine, respectively, over 24 hours. Patches will be applied for 16 hours per day. Participants will be titrated over the course of the 6-week treatment period in order to avoid initial side effects as follows: Week 1: ½ 7 mg patch per day, Week 2: 7 mg patch per day, Weeks 3-4: ¾ 14 mg patch per day, Weeks 5-6: 14 mg per day, Weeks 7-8: Treatment withdrawal
Placebo	Placebo Transdermal Patch	Matching transdermal placebo patches will be used. Participants will follow the same titration schedule as the transdermal nicotine arm. Week 1: ½ 7 mg patch per day, Week 2: 7 mg patch per day, Weeks 3-4: ¾ 14 mg patch per day, Weeks 5-6: 14 mg per day, Weeks 7-8: Treatment withdrawal

Primary Outcome Measures

Name	Time	Method
Change in the Functional Assessment of Cancer Therapy-Cognitive Function (FACT-Cog) PCI Scale	Baseline to 8-Weeks	The Functional Assessment of Cancer Therapy-Cognitive Function (FACT-Cog) scale will be used to monitor change in CRCI subjective complaints. This instrument has been used to monitor change in CRCI subjective complaints in previous studies and demonstrates good internal consistency, test-retest reliability, and discriminant and convergent validity. Specifically, the PCI subscale was used as the primary outcome measure. The FACT-Cog PCI consists of 20 items and has a minimum score of 0 and total possible score of 72. Higher scores indicate better cognitive functioning. The PCI evaluates memory, concentration, mental acuity, verbal fluency, functional interference, and multitasking ability. Visit 3 is the 3-week visit, Visit 4 is the 6-week visit, and Visit 5 is the 8-week visit. Change scores were calculated as follow

Secondary Outcome Measures

Name	Time	Method
Conners Continuous Performance Test	Baseline to 8 Weeks	The secondary outcome measure was the computerized Conners Continuous Performance Test (CPT), which measures sustained attention and vigilance. Participants see a series of letters appearing one at a time on a computer screen and they press a button for every letter that appears on the screen, except for "X". Lower scores indicate better performance. Scores on the CPT are calculated using the each participant's performance on the task (defined as reaction time (in ms) standard error/interstimulus interval). Change scores from baseline are then calculated. A decrease in CPT score = improvement. \This is not a clinical measure. This is a research measure of reaction time variability and therefore there is no clinical interpretation and no defined score range.\