Abstract
A large number of perivascular cells expressing both macrophage and melanocyte characteristics (named perivascular-resident macrophage-like melanocytes, PVM/Ms), previously found in the intra-strial fluid-blood barrier, are also found in the blood-labyrinth barrier area of the vestibular system in normal adult cochlea, including in the three ampullae of the semicircular canals (posterior, superior, and horizontal), utricle, and saccule. The cells were identified as PVM/Ms, positive for the macrophage and melanocyte marker proteins F4/80 and GSTα4. Similar to PVM/Ms present in the stria vascularis, the PVM/Ms in the vestibular system are closely associated with microvessels and structurally intertwined with endothelial cells and pericytes, with a density in normal (unstimulated) utricle of 225 ± 43/mm2; saccule 191 ± 25/mm2; horizontal ampullae 212 ± 36/mm2; anterior ampullae 238 ± 36/mm2; and posterior ampullae 223 ± 64/mm2. Injection of bacterial lipopolysaccharide into the middle ear through the tympanic membrane causes the PVM/Ms to activate and arrange in an irregular pattern along capillary walls in all regions within a 48-h period. The inflammatory response significantly increases vascular permeability and leakage. The results underscore the morphological complexity of the blood barrier in the vestibular system, with its surrounding basal lamina, pericytes, as well as second line of defense in PVM/Ms. PVM/Ms may be important to maintain blood barrier integrity and initiating local inflammatory response in the vestibular system.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 635-643 |
| Number of pages | 9 |
| Journal | JARO - Journal of the Association for Research in Otolaryngology |
| Volume | 14 |
| Issue number | 5 |
| DOIs | |
| State | Published - Oct 2013 |
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Keywords
- inflammation
- mouse vestibular system
- perivascular-resident macrophage-type melanocyte
- vascular permeability
ASJC Scopus subject areas
- Otorhinolaryngology
- Sensory Systems
Cite this
Characterization and inflammatory response of perivascular-resident macrophage-like melanocytes in the vestibular system. / Zhang, Fei; Zhang, Jinhui; Neng, Lingling; Shi, Xiao.
In: JARO - Journal of the Association for Research in Otolaryngology, Vol. 14, No. 5, 10.2013, p. 635-643.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Characterization and inflammatory response of perivascular-resident macrophage-like melanocytes in the vestibular system
AU - Zhang, Fei
AU - Zhang, Jinhui
AU - Neng, Lingling
AU - Shi, Xiao
PY - 2013/10
Y1 - 2013/10
N2 - A large number of perivascular cells expressing both macrophage and melanocyte characteristics (named perivascular-resident macrophage-like melanocytes, PVM/Ms), previously found in the intra-strial fluid-blood barrier, are also found in the blood-labyrinth barrier area of the vestibular system in normal adult cochlea, including in the three ampullae of the semicircular canals (posterior, superior, and horizontal), utricle, and saccule. The cells were identified as PVM/Ms, positive for the macrophage and melanocyte marker proteins F4/80 and GSTα4. Similar to PVM/Ms present in the stria vascularis, the PVM/Ms in the vestibular system are closely associated with microvessels and structurally intertwined with endothelial cells and pericytes, with a density in normal (unstimulated) utricle of 225 ± 43/mm2; saccule 191 ± 25/mm2; horizontal ampullae 212 ± 36/mm2; anterior ampullae 238 ± 36/mm2; and posterior ampullae 223 ± 64/mm2. Injection of bacterial lipopolysaccharide into the middle ear through the tympanic membrane causes the PVM/Ms to activate and arrange in an irregular pattern along capillary walls in all regions within a 48-h period. The inflammatory response significantly increases vascular permeability and leakage. The results underscore the morphological complexity of the blood barrier in the vestibular system, with its surrounding basal lamina, pericytes, as well as second line of defense in PVM/Ms. PVM/Ms may be important to maintain blood barrier integrity and initiating local inflammatory response in the vestibular system.
AB - A large number of perivascular cells expressing both macrophage and melanocyte characteristics (named perivascular-resident macrophage-like melanocytes, PVM/Ms), previously found in the intra-strial fluid-blood barrier, are also found in the blood-labyrinth barrier area of the vestibular system in normal adult cochlea, including in the three ampullae of the semicircular canals (posterior, superior, and horizontal), utricle, and saccule. The cells were identified as PVM/Ms, positive for the macrophage and melanocyte marker proteins F4/80 and GSTα4. Similar to PVM/Ms present in the stria vascularis, the PVM/Ms in the vestibular system are closely associated with microvessels and structurally intertwined with endothelial cells and pericytes, with a density in normal (unstimulated) utricle of 225 ± 43/mm2; saccule 191 ± 25/mm2; horizontal ampullae 212 ± 36/mm2; anterior ampullae 238 ± 36/mm2; and posterior ampullae 223 ± 64/mm2. Injection of bacterial lipopolysaccharide into the middle ear through the tympanic membrane causes the PVM/Ms to activate and arrange in an irregular pattern along capillary walls in all regions within a 48-h period. The inflammatory response significantly increases vascular permeability and leakage. The results underscore the morphological complexity of the blood barrier in the vestibular system, with its surrounding basal lamina, pericytes, as well as second line of defense in PVM/Ms. PVM/Ms may be important to maintain blood barrier integrity and initiating local inflammatory response in the vestibular system.
KW - inflammation
KW - mouse vestibular system
KW - perivascular-resident macrophage-type melanocyte
KW - vascular permeability
UR - http://www.scopus.com/inward/record.url?scp=84884281533&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84884281533&partnerID=8YFLogxK
U2 - 10.1007/s10162-013-0403-2
DO - 10.1007/s10162-013-0403-2
M3 - Article
VL - 14
SP - 635
EP - 643
JO - JARO - Journal of the Association for Research in Otolaryngology
JF - JARO - Journal of the Association for Research in Otolaryngology
SN - 1525-3961
IS - 5
ER -