期刊
INTERNATIONAL IMMUNOPHARMACOLOGY
卷 114, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.intimp.2022.109488
关键词
Macrophages; Inflammatory mediators; Cochlea; Noise-induced hearing loss; Age-related hearing loss
The cochlea encodes sound stimuli and transmits them to the central nervous system. Damage to sensory cells and synapses in the cochlea leads to hearing loss. Recent studies have found the presence of resident macrophages in the cochlea, which are responsible for detecting and clearing cellular debris and pathogens. Insult to the cochlea can activate these macrophages to initiate immune responses. This review focuses on their distribution, functions, and potential therapeutic interventions for hearing loss.
The cochlea encodes sound stimuli and transmits them to the central nervous system, and damage to sensory cells and synapses in the cochlea leads to hearing loss. The inner ear was previously considered to be an immune privileged organ to protect the auditory organ from reactions with the immune system. However, recent studies have revealed the presence of resident macrophages in the cochlea, especially in the spiral ligament, spiral ganglion, and stria vascularis. The tissue-resident macrophages are responsible for the detection, phagocytosis, and clearance of cellular debris and pathogens from the tissues, and they initiate inflammation and influence tissue repair by producing inflammatory cytokines and chemokines. Insult to the cochlea can activate the cochlear macrophages to initiate immune responses. In this review, we describe the distribution and functions of cochlear macrophages in noise-induced hearing impairment and age-related hearing disabilities. We also focus on potential therapeutic interventions concerning hearing loss by modulating local immune responses.
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