TIDE Project: Biomarker Discovery for Chronic Tinnitus Diagnosis (TIDE)

Identification and Validation of a Biomarker for Tinnitus: an Objective Data-driven Personalized Approach to Diagnosis of Chronic Tinnitus - The Tinnitus Detection (TIDE) Project

Research in clinical neuroscience is founded on the conviction that a better understanding of tinnitus related changes of brain function will improve our ability to diagnose and treat tinnitus. Although considerable advances have been made in understanding the mechanisms of tinnitus, the clinical management of tinnitus remains largely based on a 'trial and error' approach. The identification and validation of a biomarker for tinnitus is thought to be the crucial step in the development of a personalized approach to the diagnosis and treatment of tinnitus. The overarching goal of this study is to incorporate advanced technologies to provide an objective, data-driven, personalized approach to the diagnosis of chronic tinnitus. This should lead to a clinically applicable tool that can be widely and easily used.

Study Overview

• Status: Completed
• Conditions: Tinnitus
• Intervention / Treatment: Other: Acoustic paradigms

Detailed Description

The tinnitus detect (TIDE) consortium has been designed to identify and validate a biomarker for the presence and intensity of tinnitus. For this purpose, two test paradigms are combined which are derived from the most recent models of tinnitus and which have shown promise in pilot studies.

A first approach is based on a method used in animals to objectively assess tinnitus by gap detection, namely Gap prepulse inhibition of the acoustic startle (GPIAS). The GPIAS paradigm is inspired from the combination of both gap detection and pre-pulse inhibition (PPI), used for the assessment of temporal sensory processing in both animals and humans. The basic principle of PPI relies on the ability of a weak lead stimulus (a prepulse or a silent gap presented in a carrier background) to inhibit a startling effect of a following, more intense, abrupt stimulus. These paradigms have been used to assess the automatic or preconscious inhibition of the motor reflex response that occurs in healthy subjects. Because GPIAS is regulated at the level of the auditory cortex, cortical responses may provide a more accurate measure of inhibition than motor reflex responses, such as the startle response in animals or the eye blinking in humans. The hypothesis is that individuals with tinnitus would have impaired inhibition of cortical evoked responses to sound pulses when preceded by a silent gap, in comparison to non-tinnitus individuals, due to the ongoing tinnitus percept.

A second approach is based on the concept that tinnitus occurrence is related to altered processing of prediction errors. This concept is supported by empirical evidence demonstrating that people with tinnitus exhibit a more pronounced electrophysiological response to a mismatch between predictions (the expected sound based on the auditory training paradigm) and perceptions as compared to non-tinnitus individuals. This sensitivity to prediction errors (the difference between prediction and input) is associated with how loud patients perceive their tinnitus, independent of co-occurring hyperacusis and hearing loss. For example, the amplitude of the mismatch negativity (MMN) positively correlates with subjectively reported tinnitus loudness. Thus, the MMN might be a biomarker for how loud tinnitus patients perceive their tinnitus. That is, people with a more pronounced electrophysiological response to a prediction error perceive a louder phantom sound. Using another paradigm, a group, independent of us, confirmed the importance of the MMN for tinnitus detection. Furthermore, an increase in amplitude and a delay in latency for the late positive evoked brain response (P300) has been demonstrated in tinnitus patients using both auditory and visual oddball paradigms. Both the MMN and P300 are conceived as measures of prediction errors identified at respectively the sensory cortex and higher levels (i.e., frontal-parietal cortex). The P300 is thought to reflect processes involved in stimulus evaluation or categorization; whether the stimulus is behaviourally relevant or not. Therefore, the aim of the current approach is to validate that both the MMN and the P300, using an auditory oddball paradigm with omission, can be used as biomarkers for tinnitus loudness and presence, respectively, (i.e., cross-validation).

We propose to investigate these two paradigms in a large international sample of tinnitus patients and controls in order to determine the sensitivity of GPIAS and the oddball paradigm in diagnosing tinnitus in humans.

• Study Type: Observational
• Enrollment (Actual): 560

Contacts and Locations

Study Locations

• Belgium
  • Ghent, Belgium, 9000
    • Brai3n - Research center for Advanced, International, Innovative and Interdisciplinary Neuromodulation
• Germany
  • Baden-Wurttemberg
    • Tübingen, Baden-Wurttemberg, Germany, 72074
      • University of Tuebingen
  • Bavaria
    • Regensburg, Bavaria, Germany, 93053
      • Center of Neuromodulation - Psychiatry und Psychotherapie der Universität Regensburg am Bezirksklinikum
• Ireland
  • Dublin, Ireland
    • Trinity College Dublin
• Switzerland
  • Sankt Gallen, Switzerland, 9000
    • OST - Eastern Switzerland University of Applied Sciences
• United States
  • Illinois
    • Champaign, Illinois, United States, 61820
      • University of Illinois
  • Texas
    • Austin, Texas, United States, 78712
      • University of Texas

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

Patients who have been diagnosed with chronic tinnitus (for at least 6 months) and control subjects who have never had (except short-term) tinnitus.

Description

Inclusion Criteria:

(1) for tinnitus cases: a diagnosis of chronic and constant tinnitus (for at least 6 months based on history)

• (2) for controls: never experienced tinnitus
• (3) age 18 -70;
• (4) ability to understand and consent to the research;
• (5) ability to participate (hearing ability);
• (6) MoCa Test ≥ 26;
• (7) hyperacusis questionnaire score < 27;

Exclusion Criteria:

• (1) objective tinnitus; heartbeat-synchronous tinnitus as primary complaint;
• (2) otosclerosis; acoustic neuroma or other relevant ear disorders with fluctuating hearing;
• (3) acute ear nose and throat infections (acute otitis media, otitis externa, acute sinusitis);
• (4) Meniere's disease or similar syndromes;
• (5) vestibular migraine;
• (6) serious internal, neurological or psychiatric conditions;
• (7) epilepsy or other CNS disorders (brain tumor, encephalitis);
• (8) clinically relevant drug, medication or alcohol abuse up to 12 weeks before study start;
• (9) change in anti-depressants/drugs ≤ 2 weeks
• (10) missing written informed consent
• (11) severe hearing loss - inability to communicate properly in the course of the study;
• (12) one deaf ear;

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Tinnitus cases/patients; Subjects that have a diagnosis of chronic and constant tinnitus (for at least 6 months based on history)	Other: Acoustic paradigms; Acoustic oddball Gap detection
Control group; Subjects that never experienced tinnitus (excluding short-term tinnitus, i.e. not tinnitus that persists over a longer period of time)	Other: Acoustic paradigms; Acoustic oddball Gap detection

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Event-related potentials	Event-related potentials of a 64-channel EEG	4 hours

Collaborators and Investigators

• Sponsor: University of Regensburg
• Collaborators: University of Illinois at Urbana-Champaign; University Hospital, Zürich; University of Texas at Austin; University of Dublin, Trinity College; Universität Tübingen; Eastern Switzerland University of Applied Sciences; Brain - Brain Research Center for Advanced, Innovative, Interdisciplinary and International Neuromodulation
• Investigators: Principal Investigator: Sven Vanneste, Prof., Trinnitus College Dublin

Study record dates

Study Major Dates

• Study Start (Actual): August 1, 2024
• Primary Completion (Actual): November 30, 2025
• Study Completion (Actual): November 30, 2025

Study Registration Dates

• First Submitted: July 22, 2024
• First Submitted That Met QC Criteria: July 22, 2024
• First Posted (Actual): July 25, 2024

Study Record Updates

• Last Update Posted (Actual): March 24, 2026
• Last Update Submitted That Met QC Criteria: March 19, 2026
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Keywords: Tinnitus, Biomarker for Tinnitus
• Additional Relevant MeSH Terms: Neurologic Manifestations; Nervous System Diseases; Otorhinolaryngologic Diseases; Sensation Disorders; Ear Diseases; Hearing Disorders; Pathological Conditions, Signs and Symptoms; Signs and Symptoms; Tinnitus
• Other Study ID Numbers: TIDE

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No