Circulating steroids negatively correlate with tinnitus

Area of Science:

• Neuroscience
• Endocrinology
• Otolaryngology

Background:

• Tinnitus, a common symptom, significantly impacts quality of life and is associated with various health conditions.
• Risk factors include aging, noise exposure, hearing loss, and psychological factors, with a strong link to mood and depression.
• The role of steroid metabolome, including neuroactive and immunomodulatory steroids, in tinnitus pathophysiology remains under-explored.

Purpose of the Study:

• To investigate alterations in the steroid metabolome, focusing on neuroactive, neuroprotective, and immunomodulatory steroids in patients with tinnitus.
• To assess the correlation between tinnitus intensity and frequency with circulating steroid levels.
• To explore the potential link between hypothalamo-pituitary-adrenal axis function and tinnitus.

Main Methods:

• A study group of 28 tinnitus patients without organic causes or ototoxic medication effects was recruited.
• Comprehensive audiological assessment, routine biochemical tests, and steroid quantification via GC/MS and immunoassays were performed.
• Advanced diagnostics including CT/MRI and evoked potentials were utilized to rule out specific pathologies.

Main Results:

• A significant negative correlation was observed between tinnitus indices (intensity, frequency) and adrenal steroidogenesis.
• Circulating steroid levels, including hormones and neuroactive steroids, showed a negative correlation with tinnitus severity.
• Findings suggest a link between hypothalamo-pituitary-adrenal axis malfunction and tinnitus degree.

Conclusions:

• The study highlights a significant association between steroid metabolome alterations and tinnitus severity.
• Hypothalamo-pituitary-adrenal axis dysfunction may play a crucial role in the pathophysiology of tinnitus.
• Further research is warranted to validate these findings and explore diagnostic and therapeutic implications.