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Viscoelastic and histologic properties in scarred rabbit vocal folds after mesenchymal stem cell injection

Hertegard, S.; Cedervall, J.; Svensson, B.; Forsberg, K.; Maurer, Frans LU ; Vidovska, Daniela LU ; Olivius, P.; Ahrlund-Richter, L. and Le Blanc, K. (2006) In Laryngoscope 116(7). p.1248-1254
Abstract
Objective/Hypothesis: The aim of this study was to analyze the short-term viscoelastic and histologic properties of scarred rabbit vocal folds after injection of human mesenchymal stem cells (MSC) as well as the degree of MSC survival. Because MSCs are anti-inflammatory and regenerate mesenchymal tissues, can MSC injection reduce vocal fold scarring after injury? Study Design: Twelve vocal folds from 10 New Zealand rabbits were scarred by a localized resection and injected with human MSC or saline. Eight vocal folds were left as controls. Material and Methods. After 4 weeks, 10 larynges were stained for histology and evaluation of the lamina propria thickness. Collagen type I content was analyzed from six rabbits. MSC survival was analyzed... (More)
Objective/Hypothesis: The aim of this study was to analyze the short-term viscoelastic and histologic properties of scarred rabbit vocal folds after injection of human mesenchymal stem cells (MSC) as well as the degree of MSC survival. Because MSCs are anti-inflammatory and regenerate mesenchymal tissues, can MSC injection reduce vocal fold scarring after injury? Study Design: Twelve vocal folds from 10 New Zealand rabbits were scarred by a localized resection and injected with human MSC or saline. Eight vocal folds were left as controls. Material and Methods. After 4 weeks, 10 larynges were stained for histology and evaluation of the lamina propria thickness. Collagen type I content was analyzed from six rabbits. MSC survival was analyzed by fluorescent in situ hybridization staining from three rabbits. Viscoelasticity for 10 vocal folds was analyzed in a parallel-plate rheometer. Results: The rheometry on fresh-frozen samples showed decreased dynamic viscosity and lower elastic modulus (P < .01) in the scarred samples injected with MSC as compared with the untreated scarred group. Normal controls had lower dynamic viscosity and elastic modulus as compared with the scarred untreated and treated vocal folds (P < .01). Histologic analysis showed a higher content of collagen type 1 in the scarred samples as compared with the normal vocal folds and with the scarred folds treated with MSC. MSCs remained in all samples analyzed. Conclusions. The treated scarred vocal folds showed persistent MSC. Injection of scarred rabbit vocal folds with MSC rendered improved viscoelastic parameters and less signs of scarring expressed as collagen content in comparison to the untreated scarred vocal folds. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Laryngoscope
volume
116
issue
7
pages
1248 - 1254
publisher
Lippincott Williams & Wilkins
external identifiers
  • wos:000238873800032
  • pmid:16826069
  • scopus:33747173756
ISSN
1531-4995
DOI
10.1097/01.mlg.0000224548.68499.35
language
English
LU publication?
yes
id
cdb9b637-cc10-4923-aa2d-3d0d61dcf986 (old id 541219)
alternative location
http://www.laryngoscope.com/pt/re/laryngoscope/abstract.00005537-200607000-00032.htm;jsessionid=GvyJh240wB02P2zvtBQF02LvhbbhyDhYQNj1h5FLJd6yhYQlvQtr!1683421839!181195628!8091!-1?index=1&database=ppvovft&results=1&count=10&searchid=3&nav=search
date added to LUP
2007-10-03 21:10:35
date last changed
2019-03-17 04:21:11
@article{cdb9b637-cc10-4923-aa2d-3d0d61dcf986,
  abstract     = {Objective/Hypothesis: The aim of this study was to analyze the short-term viscoelastic and histologic properties of scarred rabbit vocal folds after injection of human mesenchymal stem cells (MSC) as well as the degree of MSC survival. Because MSCs are anti-inflammatory and regenerate mesenchymal tissues, can MSC injection reduce vocal fold scarring after injury? Study Design: Twelve vocal folds from 10 New Zealand rabbits were scarred by a localized resection and injected with human MSC or saline. Eight vocal folds were left as controls. Material and Methods. After 4 weeks, 10 larynges were stained for histology and evaluation of the lamina propria thickness. Collagen type I content was analyzed from six rabbits. MSC survival was analyzed by fluorescent in situ hybridization staining from three rabbits. Viscoelasticity for 10 vocal folds was analyzed in a parallel-plate rheometer. Results: The rheometry on fresh-frozen samples showed decreased dynamic viscosity and lower elastic modulus (P &lt; .01) in the scarred samples injected with MSC as compared with the untreated scarred group. Normal controls had lower dynamic viscosity and elastic modulus as compared with the scarred untreated and treated vocal folds (P &lt; .01). Histologic analysis showed a higher content of collagen type 1 in the scarred samples as compared with the normal vocal folds and with the scarred folds treated with MSC. MSCs remained in all samples analyzed. Conclusions. The treated scarred vocal folds showed persistent MSC. Injection of scarred rabbit vocal folds with MSC rendered improved viscoelastic parameters and less signs of scarring expressed as collagen content in comparison to the untreated scarred vocal folds.},
  author       = {Hertegard, S. and Cedervall, J. and Svensson, B. and Forsberg, K. and Maurer, Frans and Vidovska, Daniela and Olivius, P. and Ahrlund-Richter, L. and Le Blanc, K.},
  issn         = {1531-4995},
  language     = {eng},
  number       = {7},
  pages        = {1248--1254},
  publisher    = {Lippincott Williams & Wilkins},
  series       = {Laryngoscope},
  title        = {Viscoelastic and histologic properties in scarred rabbit vocal folds after mesenchymal stem cell injection},
  url          = {http://dx.doi.org/10.1097/01.mlg.0000224548.68499.35},
  volume       = {116},
  year         = {2006},
}