Abstract
Hypothesis: Macrophage migration inhibitory factor plays an important role in noise-induced hearing loss. Background: Macrophage migration inhibitory factor is an essential factor in axis formation and neural development. Macrophage migration inhibitory factor is expressed in the inner ear, but its function remains to be elucidated. Methods: Macrophage migration inhibitory factor-deficient mice (MIF-/- mice) were used in this study. Wild-type and MIF-/- mice received noise exposure composed of octave band noise. Auditory brainstem response thresholds were examined before (control) and at 0, 12, and 24 hours and 2 weeks after the intense noise exposure. Morphological findings of cochlear hair cells were investigated using scanning electron microscopy. Histopathological examination with hematoxylin and eosin staining and TUNEL assay were also performed. Results: In both the wild-type and MIF-/- mice, acoustic overstimulation induced significant hearing loss compared with the control level. Two weeks after the intense noise exposure, the MIF-/- mice had an increased hearing threshold compared with the wild-type mice. Scanning electron microscopy demonstrated that the outer hair cells in the MIF-/- mice were affected 2 weeks after noise exposure compared with the wild-type mice. TUNEL-positive cells were identified in the organ of Corti of the MIF-/- mice. Conclusion: The MIF-/- mice had prolonged hearing loss and significant loss of cochlear hair cells after intense noise exposure. Macrophage migration inhibitory factor may play an important role in recovery from acoustic trauma. Management of macrophage migration inhibitory factor may be a novel therapeutic option for noise-induced hearing loss.
| Original language | English |
|---|---|
| Pages (from-to) | 1103-1108 |
| Number of pages | 6 |
| Journal | Otology and Neurotology |
| Volume | 36 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jul 26 2015 |
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Keywords
- Cochlea
- Ear
- Hearing loss
- Macrophage migration inhibitory factor
- Noise-induced hearing loss
ASJC Scopus subject areas
- Otorhinolaryngology
- Clinical Neurology
- Sensory Systems
Cite this
Macrophage Migration Inhibitory Factor Deficiency Causes Prolonged Hearing Loss After Acoustic Overstimulation. / Kariya, Shin; Okano, Mitsuhiro; Maeda, Yukihide; Hirai, Haruka; Higaki, Takaya; Noyama, Yasuyuki; Haruna, Takenori; Nishihira, Jun; Nishizaki, Kazunori.
In: Otology and Neurotology, Vol. 36, No. 6, 26.07.2015, p. 1103-1108.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Macrophage Migration Inhibitory Factor Deficiency Causes Prolonged Hearing Loss After Acoustic Overstimulation
AU - Kariya, Shin
AU - Okano, Mitsuhiro
AU - Maeda, Yukihide
AU - Hirai, Haruka
AU - Higaki, Takaya
AU - Noyama, Yasuyuki
AU - Haruna, Takenori
AU - Nishihira, Jun
AU - Nishizaki, Kazunori
PY - 2015/7/26
Y1 - 2015/7/26
N2 - Hypothesis: Macrophage migration inhibitory factor plays an important role in noise-induced hearing loss. Background: Macrophage migration inhibitory factor is an essential factor in axis formation and neural development. Macrophage migration inhibitory factor is expressed in the inner ear, but its function remains to be elucidated. Methods: Macrophage migration inhibitory factor-deficient mice (MIF-/- mice) were used in this study. Wild-type and MIF-/- mice received noise exposure composed of octave band noise. Auditory brainstem response thresholds were examined before (control) and at 0, 12, and 24 hours and 2 weeks after the intense noise exposure. Morphological findings of cochlear hair cells were investigated using scanning electron microscopy. Histopathological examination with hematoxylin and eosin staining and TUNEL assay were also performed. Results: In both the wild-type and MIF-/- mice, acoustic overstimulation induced significant hearing loss compared with the control level. Two weeks after the intense noise exposure, the MIF-/- mice had an increased hearing threshold compared with the wild-type mice. Scanning electron microscopy demonstrated that the outer hair cells in the MIF-/- mice were affected 2 weeks after noise exposure compared with the wild-type mice. TUNEL-positive cells were identified in the organ of Corti of the MIF-/- mice. Conclusion: The MIF-/- mice had prolonged hearing loss and significant loss of cochlear hair cells after intense noise exposure. Macrophage migration inhibitory factor may play an important role in recovery from acoustic trauma. Management of macrophage migration inhibitory factor may be a novel therapeutic option for noise-induced hearing loss.
AB - Hypothesis: Macrophage migration inhibitory factor plays an important role in noise-induced hearing loss. Background: Macrophage migration inhibitory factor is an essential factor in axis formation and neural development. Macrophage migration inhibitory factor is expressed in the inner ear, but its function remains to be elucidated. Methods: Macrophage migration inhibitory factor-deficient mice (MIF-/- mice) were used in this study. Wild-type and MIF-/- mice received noise exposure composed of octave band noise. Auditory brainstem response thresholds were examined before (control) and at 0, 12, and 24 hours and 2 weeks after the intense noise exposure. Morphological findings of cochlear hair cells were investigated using scanning electron microscopy. Histopathological examination with hematoxylin and eosin staining and TUNEL assay were also performed. Results: In both the wild-type and MIF-/- mice, acoustic overstimulation induced significant hearing loss compared with the control level. Two weeks after the intense noise exposure, the MIF-/- mice had an increased hearing threshold compared with the wild-type mice. Scanning electron microscopy demonstrated that the outer hair cells in the MIF-/- mice were affected 2 weeks after noise exposure compared with the wild-type mice. TUNEL-positive cells were identified in the organ of Corti of the MIF-/- mice. Conclusion: The MIF-/- mice had prolonged hearing loss and significant loss of cochlear hair cells after intense noise exposure. Macrophage migration inhibitory factor may play an important role in recovery from acoustic trauma. Management of macrophage migration inhibitory factor may be a novel therapeutic option for noise-induced hearing loss.
KW - Cochlea
KW - Ear
KW - Hearing loss
KW - Macrophage migration inhibitory factor
KW - Noise-induced hearing loss
UR - http://www.scopus.com/inward/record.url?scp=84933505886&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84933505886&partnerID=8YFLogxK
U2 - 10.1097/MAO.0000000000000755
DO - 10.1097/MAO.0000000000000755
M3 - Article
C2 - 25853607
AN - SCOPUS:84933505886
VL - 36
SP - 1103
EP - 1108
JO - Otology and Neurotology
JF - Otology and Neurotology
SN - 1531-7129
IS - 6
ER -