- ICH GCP
- Registr klinických studií v USA
- Klinická studie NCT07877701
Acute Nicotine Gum and Auditory Brain Responses in Adults With Chronic Tinnitus
A Randomized, Double-Blind, Placebo-Controlled, Within-Subject Crossover Trial of a Single 4 mg Dose of Nicotine Polacrilex Gum on Auditory Oddball P3, Oddball Task Performance, and Resting-State EEG in Non-Smoking Adults With Chronic Tinnitus
This study tests whether a single dose of nicotine gum changes brain responses to sounds and the ability to detect target sounds in non-smoking adults with chronic tinnitus. In a double-blind, placebo-controlled, within-subject crossover design, each participant attends two sessions and receives a single 4 mg dose of nicotine polacrilex gum at one session and a flavor-matched placebo gum at the other, in random order. After gum administration, EEG is recorded at rest and during an active auditory oddball task. The primary measures are the P3 brain response (amplitude and latency) and oddball task accuracy and reaction time.
Přehled studie
Postavení
Podmínky
Intervence / Léčba
Detailní popis
Relationship to prior registration: This trial is a separate, newly enrolled study conducted under the same IRB-approved protocol (San Diego State University IRB-25-0430) as the completed trial NCT07772089, which evaluated acute nicotine gum effects on tinnitus loudness and selective attention. Participants and data in this trial are collected independently of NCT07772089.
Population: Non-smoking adults aged 18-80 years with chronic subjective tinnitus, using the same eligibility criteria as NCT07772089.
Intervention and administration: A single 4 mg dose of nicotine polacrilex gum or flavor-matched placebo gum, chewed continuously for 20 minutes at one chew per second (paced by a 1 Hz auditory cue) with saliva retained, following the administration protocol established in the investigators' gum optimization study.
Design: Randomized, double-blind, placebo-controlled, within-subject crossover with two sessions on separate days separated by a washout of at least 72 hours. Session order is randomized 1:1 using a computer-generated sequence; allocation is concealed with sequentially numbered, opaque, sealed envelopes; gum is prepared by an independent examiner and participants are blindfolded during administration.
Procedures: At the start of the first session, pure-tone audiometry, the Tinnitus Handicap Inventory, the Tinnitus Functional Index, and a pre-administration tinnitus loudness match are completed. In each session, tinnitus loudness is matched before and after gum administration. All EEG and oddball measures are obtained after gum administration only. EEG is analyzed at electrodes Fz, Cz, Pz, and Oz: resting-state spectral power (delta, theta, alpha, beta, gamma) and aperiodic (1/f) slope, and P3 amplitude and latency to target tones in an active auditory oddball task, with concurrent behavioral accuracy, reaction time, and d'.
Typ studie
Zápis (Odhadovaný)
Fáze
- Fáze 2
- Fáze 1
Kontakty a umístění
Studijní kontakt
- Jméno: Xianhui Wang
- Telefonní číslo: 619-594-1151
- E-mail: kwang5@sdsu.edu
Studijní místa
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California
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San Diego, California, Spojené státy, 92182
- San Diego State University
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Kritéria účasti
Kritéria způsobilosti
Věk způsobilý ke studiu
Přijímá zdravé dobrovolníky
Pohlaví způsobilá ke studiu
Popis
Inclusion Criteria:
- Non-smoking adult, defined as fewer than 100 cigarettes in a lifetime and none in the past year, with a Fagerstrom Test for Nicotine Dependence score of 2 or less and a negative urinary cotinine test
- Chronic subjective tinnitus of at least 6 months' duration
Exclusion Criteria:
- Current or recent tobacco or nicotine use
- Pregnancy or breastfeeding
- Unstable cardiovascular disease
- Any condition precluding the psychoacoustic tasks
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Základní věda
- Přidělení: Randomizované
- Intervenční model: Crossover Assignment
- Maskování: Dvojnásobek
Zbraně a zásahy
Skupina účastníků / Arm |
Intervence / Léčba |
|---|---|
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Experimentální: Nicotine gum (4 mg)
Single 4 mg dose of nicotine polacrilex gum, chewed for 20 minutes at 1 Hz using the standardized administration protocol. |
A single 4 mg dose (one 4 mg piece) of mint nicotine polacrilex gum, chewed continuously for 20 minutes at one chew per second with saliva retained.
Ostatní jména:
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Komparátor placeba: Placebo gum
Flavor-, color-, shape-, and texture-matched placebo gum, chewed under the identical protocol. |
Flavor-matched sugar-free mint gum (Trident) matched to the nicotine gum in shape, flavor, color, and texture, chewed under the identical protocol. |
Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
Auditory oddball P3 amplitude after administration (nicotine vs placebo)
Časové okno: Up to 2 hours after gum administration
|
P3 (P300) peak amplitude in microvolts was measured from the event-related potential elicited by target tones during an active auditory oddball task performed after gum administration, at electrodes Fz, Cz, Pz, and Oz. Amplitude was compared between the nicotine and placebo sessions. |
Up to 2 hours after gum administration
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Auditory oddball P3 latency after administration (nicotine vs placebo)
Časové okno: Up to 2 hours after gum administration
|
P3 (P300) peak latency in milliseconds was measured from the event-related potential elicited by target tones during an active auditory oddball task performed after gum administration, at electrodes Fz, Cz, Pz, and Oz. Latency was compared between the nicotine and placebo sessions. |
Up to 2 hours after gum administration
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Auditory oddball target-detection accuracy after administration (nicotine vs placebo)
Časové okno: Up to 2 hours after gum administration
|
Behavioral accuracy (percentage of target tones correctly detected) in the active auditory oddball task performed after gum administration was compared between the nicotine and placebo sessions. |
Up to 2 hours after gum administration
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Auditory oddball reaction time after administration (nicotine vs placebo)
Časové okno: Up to 2 hours after gum administration
|
Mean reaction time in milliseconds to correctly detected target tones in the active auditory oddball task performed after gum administration was compared between the nicotine and placebo sessions. |
Up to 2 hours after gum administration
|
Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Resting-state EEG spectral power and aperiodic (1/f) slope after administration (nicotine vs placebo)
Časové okno: Up to 2 hours after gum administration
|
Resting-state EEG was recorded after gum administration. Absolute spectral power was computed for the delta, theta, alpha, beta, and gamma frequency bands, and the aperiodic (1/f) slope of the power spectrum was estimated, at electrodes Fz, Cz, Pz, and Oz. Values were compared between the nicotine and placebo sessions. |
Up to 2 hours after gum administration
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Auditory oddball sensitivity (d') after administration (nicotine vs placebo)
Časové okno: Up to 2 hours after gum administration
|
Signal-detection sensitivity (d') computed from hits and false alarms in the active auditory oddball task performed after gum administration was compared between the nicotine and placebo sessions. |
Up to 2 hours after gum administration
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Další výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Within-session change in psychoacoustic tinnitus loudness match (nicotine vs placebo)
Časové okno: Baseline (pre-administration) and up to 2 hours after gum administration
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Tinnitus loudness was matched to the participant's tinnitus pitch by a method-of-adjustment procedure and expressed in dB sensation level. The pre-to-post change was compared between the nicotine and placebo sessions. |
Baseline (pre-administration) and up to 2 hours after gum administration
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Tinnitus Handicap Inventory (THI) score
Časové okno: Baseline (pre-administration, first session)
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The Tinnitus Handicap Inventory is a 25-item self-report questionnaire of tinnitus-related handicap. Each item is answered yes (4 points), sometimes (2 points), or no (0 points). The total score ranges from 0 to 100; higher scores indicate greater tinnitus handicap (a worse outcome). |
Baseline (pre-administration, first session)
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Tinnitus Functional Index (TFI) score
Časové okno: Baseline (pre-administration, first session)
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The Tinnitus Functional Index is a 25-item self-report questionnaire of the functional impact of tinnitus. Each item is rated on a 0-10 scale, and the overall score is the mean of the answered items multiplied by 10. The overall score ranges from 0 to 100; higher scores indicate more severe tinnitus impact (a worse outcome). |
Baseline (pre-administration, first session)
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Pure-tone audiometry (0.25-12 kHz)
Časové okno: Baseline (pre-administration, first session)
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Baseline hearing thresholds, collected once at the start of the first session. |
Baseline (pre-administration, first session)
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Spolupracovníci a vyšetřovatelé
Sponzor
Vyšetřovatelé
- Vrchní vyšetřovatel: Xianhui Wang, San Diego State University
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia (Odhadovaný)
Primární dokončení (Odhadovaný)
Dokončení studie (Odhadovaný)
Termíny zápisu do studia
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Aktuální)
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Více informací
Termíny související s touto studií
Klíčová slova
Další relevantní podmínky MeSH
- Neurologické projevy
- Nemoci nervového systému
- Otorinolaryngologická onemocnění
- Poruchy vnímání
- Nemoci uší
- Poruchy sluchu
- Patologické stavy, příznaky a symptomy
- Příznaky a symptomy
- Tinnitus
- Terapeutika
- Jídlo
- Strava, jídlo a výživa
- Fyziologické jevy
- Jídlo a nápoje
- Uhlohydráty
- Polymery
- Makromolekulární látky
- Polysacharidy
- Biopolymery
- Rostlinné dásně
- Bonbón
- Žvýkačka
- Zařízení pro ukončení tabáku
- Nicotinová žvýkačka
Další identifikační čísla studie
- IRB-25-0430-EEG
Informace o lécích a zařízeních, studijní dokumenty
Studuje lékový produkt regulovaný americkým FDA
Studuje produkt zařízení regulovaný americkým úřadem FDA
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