Utilizing single-cell transcriptome sequencing (scRNA-seq) technology, this study explores the viability of employing mesenchymal stem cells (MSCs) as a therapeutic approach for age-related hearing loss (ARHL). The research demonstrates MSCs' ability to differentiate into inner ear cell subpopulations, particularly hair cells, delivering Apelin via extracellular vesicles (EVs) to promote M2 macrophage polarization. In vitro experiments show reduced inflammation and preservation of hair cell health. In elderly mice, MSCs transplantation leads to hair cell regeneration, restoring auditory function. These findings highlight the regenerative capabilities of MSCs and EV-mediated therapeutic approaches for ARHL.
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http://dx.doi.org/10.1007/s10565-025-09988-4 | DOI Listing |
Cell Biol Toxicol
January 2025
Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, China.
Utilizing single-cell transcriptome sequencing (scRNA-seq) technology, this study explores the viability of employing mesenchymal stem cells (MSCs) as a therapeutic approach for age-related hearing loss (ARHL). The research demonstrates MSCs' ability to differentiate into inner ear cell subpopulations, particularly hair cells, delivering Apelin via extracellular vesicles (EVs) to promote M2 macrophage polarization. In vitro experiments show reduced inflammation and preservation of hair cell health.
View Article and Find Full Text PDFOtolaryngol Pol
January 2025
Department of Otolaryngology, Jagiellonian University Medical College, Cracow, Poland.
<b>Introduction:</b> In the course of middle ear diseases, a disturbed influence of the system transmitting sound through the middle ear on the function of the inner ear is observed. The audiometric consequence of the disease process taking place in the middle ear is the shift in bone conduction (BC) thresholds, which is called pseudoperceptive hearing loss (the so-called Carhart effect). The natural process of aging of the hearing system (age-related hearing loss) means that the manifestation of the Carhart effect varies in different age groups.
View Article and Find Full Text PDFHeliyon
January 2025
Department of Laboratory Medicine, Fujian Medical University, Fuzhou, 350122, China.
Presbycusis, also referred to as age-related hearing loss, poses a substantial burden on both individuals and society. The hallmark of presbycusis is a progressive decrease in auditory sensitivity. Irreversible hearing loss occurs due to the limited regenerative capacity of spiral neurons and peripheral cochlear hair cells (HCs).
View Article and Find Full Text PDFJ Korean Med Sci
January 2025
Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Hanyang University, Seoul, Korea.
Background: Hearing level reference values based on the results of recent audiometry have not been established for the general population of South Korea. This study aimed to evaluate the mean hearing levels of each age group and to measure the annual progression of hearing loss.
Methods: We used the database of the eighth and ninth Korea National Health and Nutrition Examination Survey from 2020 to 2022, and included participants with normal tympanic membranes and without occupational noise exposure.
eNeuro
January 2025
Hearing Technology @ WAVES, Department of Information Technology, Ghent University, Technologiepark 216, 9052 Zwijnaarde, Belgium
Speech intelligibility declines with age and sensorineural hearing damage (SNHL). However, it remains unclear whether cochlear synaptopathy (CS), a recently discovered form of SNHL, significantly contributes to this issue. CS refers to damaged auditory-nerve synapses that innervate the inner hair cells and there is currently no go-to diagnostic test available.
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