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Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model
INTRODUCTION: The combination of traumatic brain injury (TBI) and long-bone fracture leads to increased formation of callus and mineral density in wild-type (WT) mice. However, this effect was not detected radiologically in leptin-deficient mice. Due to the complex interactions between hormonal and...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Society of Musculoskeletal and Neuronal Interactions
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5881126/ https://www.ncbi.nlm.nih.gov/pubmed/29504576 |
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author | Seemann, Ricarda Graef, Frank Garbe, Anja Keller, Johannes Huang, Fan Duda, Georg Schmidt-Bleek, Kate Schaser, Klaus-Dieter Tsitsilonis, Serafeim |
author_facet | Seemann, Ricarda Graef, Frank Garbe, Anja Keller, Johannes Huang, Fan Duda, Georg Schmidt-Bleek, Kate Schaser, Klaus-Dieter Tsitsilonis, Serafeim |
author_sort | Seemann, Ricarda |
collection | PubMed |
description | INTRODUCTION: The combination of traumatic brain injury (TBI) and long-bone fracture leads to increased formation of callus and mineral density in wild-type (WT) mice. However, this effect was not detected radiologically in leptin-deficient mice. Due to the complex interactions between hormonal and bone metabolism and the important role of leptin in this setting, our aim was to investigate morphologic properties and the tissue composition in the fracture callus comparing WT and leptin-deficient mice. METHODS: Female C57/Black6N mice (n=36) and leptin deficient ob/ob mice (n=36) each were assigned to two groups (fracture Fx/combined trauma Fx/TBI). Femoral osteotomy was stabilized with external fixator, TBI was induced with controlled cortical impact injury. After sacrifice of the animals, femora were harvested, cryofixated, and 7 µm slices were prepared. Staining was performed adhering to Movat’s Pentachrome protocol. Histomorphometric analysis, quantifying percentage of mineralized bone area, and a semi-quantitative evaluation of bone bridging were performed. RESULTS: Leptin deficient mice showed a higher rate of non-union after osteotomy, less callus formation in the osteotomy gap, and unexpected bone and cartilage formation independent of the osteotomy region. DISCUSSION: Leptin plays an important role in fracture healing and bone formation. Without Leptin, the positive effect of TBI on fracture healing ceases. The comprehension of the underlying pathophysiological process could sign important for novel strategies in stimulation of fracture healing. |
format | Online Article Text |
id | pubmed-5881126 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | International Society of Musculoskeletal and Neuronal Interactions |
record_format | MEDLINE/PubMed |
spelling | pubmed-58811262018-04-05 Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model Seemann, Ricarda Graef, Frank Garbe, Anja Keller, Johannes Huang, Fan Duda, Georg Schmidt-Bleek, Kate Schaser, Klaus-Dieter Tsitsilonis, Serafeim J Musculoskelet Neuronal Interact Original Article INTRODUCTION: The combination of traumatic brain injury (TBI) and long-bone fracture leads to increased formation of callus and mineral density in wild-type (WT) mice. However, this effect was not detected radiologically in leptin-deficient mice. Due to the complex interactions between hormonal and bone metabolism and the important role of leptin in this setting, our aim was to investigate morphologic properties and the tissue composition in the fracture callus comparing WT and leptin-deficient mice. METHODS: Female C57/Black6N mice (n=36) and leptin deficient ob/ob mice (n=36) each were assigned to two groups (fracture Fx/combined trauma Fx/TBI). Femoral osteotomy was stabilized with external fixator, TBI was induced with controlled cortical impact injury. After sacrifice of the animals, femora were harvested, cryofixated, and 7 µm slices were prepared. Staining was performed adhering to Movat’s Pentachrome protocol. Histomorphometric analysis, quantifying percentage of mineralized bone area, and a semi-quantitative evaluation of bone bridging were performed. RESULTS: Leptin deficient mice showed a higher rate of non-union after osteotomy, less callus formation in the osteotomy gap, and unexpected bone and cartilage formation independent of the osteotomy region. DISCUSSION: Leptin plays an important role in fracture healing and bone formation. Without Leptin, the positive effect of TBI on fracture healing ceases. The comprehension of the underlying pathophysiological process could sign important for novel strategies in stimulation of fracture healing. International Society of Musculoskeletal and Neuronal Interactions 2018-03 /pmc/articles/PMC5881126/ /pubmed/29504576 Text en Copyright: © Journal of Musculoskeletal and Neuronal Interactions http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Seemann, Ricarda Graef, Frank Garbe, Anja Keller, Johannes Huang, Fan Duda, Georg Schmidt-Bleek, Kate Schaser, Klaus-Dieter Tsitsilonis, Serafeim Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model |
title | Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model |
title_full | Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model |
title_fullStr | Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model |
title_full_unstemmed | Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model |
title_short | Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model |
title_sort | leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5881126/ https://www.ncbi.nlm.nih.gov/pubmed/29504576 |
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