Ménière’s disease, a disabling inner-ear disorder marked by recurrent vertigo, fluctuating hearing loss, tinnitus, and a sensation of pressure or fullness, may be driven by a convergence of biological disturbances in the endolymphatic sac, according to a comprehensive review published in Genes & Diseases. The analysis brings together findings from genetics, immunology, virology, fluid physiology, animal modeling, and multi-omics research to propose a more unified explanation for a disease that has resisted a single definitive cause for more than a century.
The endolymphatic sac is a small but highly specialized structure that helps regulate the composition and volume of endolymph, the potassium-rich fluid surrounding sensory cells in the inner ear. It also participates in immune surveillance and the removal of fluid and cellular waste. The review proposes that genetic vulnerability, infection, inflammation, impaired ion transport, or other environmental stresses may disrupt the sac’s normal functions. This disruption could cause endolymphatic hydrops, an abnormal expansion of the fluid-filled compartments of the inner ear that has long been considered a pathological hallmark of Ménière’s disease.
Endolymphatic hydrops can interfere with the delicate mechanics of hearing and balance. The cochlea and vestibular organs depend on precisely maintained ionic gradients, particularly the separation between potassium-rich endolymph and sodium-rich perilymph. These gradients allow sensory hair cells to convert mechanical movement into electrical signals. If fluid pressure rises or ion regulation fails, hair-cell signaling may become unstable or damaged. Such disturbances could help explain why patients often experience symptoms that fluctuate over time rather than remaining constant.
The review emphasizes that Ménière’s disease is unlikely to result from one universal pathway. Genetic susceptibility may influence the development of the endolymphatic sac, the activity of ion channels, the integrity of the extracellular matrix, or the way sensory cells respond to stress. In some families, inherited variants appear to contribute strongly to disease risk, while sporadic cases may emerge through a more complicated interaction between modest genetic predisposition and acquired triggers. These triggers could include viral infection, allergic responses, autoimmune activity, vascular changes, or chronic inflammation.
Viral and immune mechanisms are receiving particular attention. Viral infections may injure inner-ear tissues directly or activate inflammatory pathways that persist after the initial infection has subsided. Immune cells and inflammatory mediators could alter the permeability of local blood vessels, damage supporting cells, or interfere with the fluid-handling functions of the endolymphatic sac. The review also considers the possibility that allergic reactions and changes in the inner-ear microbiome may influence local immune activity. Although the inner ear was once viewed as largely isolated from systemic immune processes, emerging evidence indicates that immune signaling can affect its physiology and disease response.
Modern multi-omics technologies are providing new tools for investigating these mechanisms. Genomics can identify inherited or acquired DNA variants, while transcriptomics measures changes in gene activity in tissues or cells. Proteomics examines the abundance and modification of proteins, including inflammatory molecules and ion-transport components, and metabolomics detects changes in small molecules produced by cellular metabolism. When integrated, these approaches can reveal molecular networks associated with oxidative stress, immune activation, extracellular matrix remodeling, abnormal fluid regulation, and altered neural signaling. They may also identify biomarkers capable of distinguishing Ménière’s disease from other causes of vertigo and hearing loss.
Biomarker development is important because diagnosis currently depends heavily on clinical history and symptom patterns. Patients may experience attacks separated by weeks or months, and the same symptoms can occur in vestibular migraine, autoimmune inner-ear disease, infections, and other disorders. A reliable molecular signature could help clinicians diagnose Ménière’s disease earlier, identify biologically distinct subtypes, and monitor responses to treatment. The review suggests that future diagnostic strategies may combine clinical assessment with genetic information, inflammatory profiles, imaging, and molecular measurements from accessible biological samples.
The authors also examine the limitations of existing animal models. Some models reproduce fluid accumulation or selected changes in inner-ear structure, but none fully captures the unpredictable attacks, fluctuating hearing loss, tinnitus, and long-term progression experienced by human patients. Differences in anatomy, immune responses, genetics, and sensory behavior make it difficult to translate findings directly from animals to people. The review argues that more representative models should combine surgical manipulation, targeted genetic changes, inflammatory or infectious triggers, and detailed behavioral and physiological monitoring.
A deeper understanding of the endolymphatic sac and its surrounding molecular environment could eventually lead to more precise treatments. Instead of focusing only on reducing vertigo after it occurs, researchers may be able to target inflammation, restore ion transport, limit oxidative damage, stabilize extracellular matrix structure, or correct abnormal immune signaling. Genetic and multi-omics data could help match individual patients to specific interventions. The review concludes that Ménière’s disease should be approached as a biologically diverse disorder in which several pathways converge on the inner ear’s fluid-regulating and sensory systems, a framework that may accelerate the search for earlier diagnosis and mechanism-based therapies.
Subject of Research: Ménière’s disease, its biological mechanisms, endolymphatic hydrops, animal models, genetics, immune pathways, viral factors, and multi-omics research.
Article Title: Research progress on the mechanisms and animal models of Ménière’s disease
Web References: https://doi.org/10.1016/j.gendis.2025.102022
References: Siyuan Liu, Yanshi Li, Yuting Zhang, Yuxiao Zheng, Chen Jin, Lin Chen, Guohua Hu, Wenqi Zuo, “Research progress on the mechanisms and animal models of Ménière’s disease,” Genes & Diseases, Volume 13, Issue 5, 2026, 102022.
Image Credits: Genes & Diseases
Keywords: Ménière’s disease, endolymphatic sac, endolymphatic hydrops, vertigo, hearing loss, tinnitus, inner ear, genetics, viral infection, inflammation, immune system, multi-omics, biomarkers, animal models, ion regulation.
