Eosinophilic otitis media (EOM) is a type 2-related otitis media. Scientists at the Hirosaki University Graduate School of Medicine have developed a new EOM animal model in guinea pigs by using the plant protease papain. Papin was intratympanically administered in a daily basis. They also investigated the expression of innate lymphoid cell type 2 (ILC2) in the middle ear mucosa of these animals.
Lysine demethylase 6A (KDM6A) is a demethylase that plays a key role at regulating developmental gene expression signatures in several tissues, including neuronal cells. The KDM6A gene is located in chromosome X and pathogenic variants in this gene are tied to Kabuki syndrome type 2. Even though progress in understanding the functions of KDM6A has been made, its role in cochlear development and auditory function remains poorly understood.
Researchers from Medical University of Vienna and affiliated organizations have presented findings from a study that aimed to assess the perilymph and tissue distribution of AC-102, a small and lipophilic intratympanically delivered pyridoindole derivative, in clinical development at Audiocure Pharma GmbH for the treatment of idiopathic sudden sensorineural hearing loss.
Aminoglycoside antibiotics are essential for treating some severe bacterial infections but are notorious for causing irreversible hearing loss in 20%-47% of patients.
Family with sequence similarity 19 member A5 (FAM19A5) is a secretory protein highly expressed in the brain that regulates synapse dynamics through its interaction with leucine-rich repeat-containing 4B (LRRC4B). Noise exposure is one of the most significant causes of synapse loss between inner hair cells and auditory nerve fibers, leading to a decline in hearing sensitivity.
The most common form of hereditary deafness in humans is caused by mutations in the GJB2 gene, which encodes the gap junction protein connexin 26. That regulates the transport of potassium and metabolites between inner ear cells. The coding sequence of this gene fits in an adenovirus-associated vector (AAV), making it an attractive approach for gene therapy.
Primemupharma Co. Ltd. has divulged compounds comprising a novel polyester linker acting as antioxidants reported to be useful for the treatment of hearing loss and Meniere’s disease.
More than half of all hearing loss cases are hereditary. Myelin protein zero-like 2, encoded by MPZL2, is widely expressed in cochlear cells in the inner ear. Mutations in MPZL2 have been identified as the second most prevalent cause of mild to moderate hereditary hearing loss.
Piplartine, also called piperlongumine, had protective effects against hearing loss induced by aminoglycoside antibiotics in zebrafish and mouse models of kanamycin-induced hair cell loss. Kanamycin is a member of the aminoglycosides, a group of antibiotics that have broad-spectrum activity against gram-negative bacteria, including multidrug resistant strains.
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