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Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing

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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. / Seemann, Ricarda; Graef, Frank; Garbe, Anja; Keller, Johannes; Huang, Fan; Duda, Georg; Schmidt-Bleek, Kate; Schaser, Klaus-Dieter; Tsitsilonis, Serafeim.

In: J MUSCULOSKEL NEURON, Vol. 18, No. 1, 01.03.2018, p. 32-41.

Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review

Harvard

Seemann, R, Graef, F, Garbe, A, Keller, J, Huang, F, Duda, G, Schmidt-Bleek, K, Schaser, K-D & Tsitsilonis, S 2018, 'Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model', J MUSCULOSKEL NEURON, vol. 18, no. 1, pp. 32-41.

APA

Seemann, R., Graef, F., Garbe, A., Keller, J., Huang, F., Duda, G., Schmidt-Bleek, K., Schaser, K-D., & Tsitsilonis, S. (2018). Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model. J MUSCULOSKEL NEURON, 18(1), 32-41.

Vancouver

Seemann R, Graef F, Garbe A, Keller J, Huang F, Duda G et al. Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model. J MUSCULOSKEL NEURON. 2018 Mar 1;18(1):32-41.

Bibtex

@article{6623ee7a768c4aefa30b2d052606a40d,
title = "Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing: histological analyses in a combined trauma mouse model",
abstract = "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.",
keywords = "Animals, Brain Injuries, Traumatic/complications, Disease Models, Animal, Female, Femoral Fractures/complications, Femur/injuries, Fracture Healing/physiology, Leptin/metabolism, Mice, Osteogenesis/physiology, Osteotomy",
author = "Ricarda Seemann and Frank Graef and Anja Garbe and Johannes Keller and Fan Huang and Georg Duda and Kate Schmidt-Bleek and Klaus-Dieter Schaser and Serafeim Tsitsilonis",
year = "2018",
month = mar,
day = "1",
language = "English",
volume = "18",
pages = "32--41",
number = "1",

}

RIS

TY - JOUR

T1 - Leptin-deficiency eradicates the positive effect of traumatic brain injury on bone healing

T2 - histological analyses in a combined trauma mouse model

AU - Seemann, Ricarda

AU - Graef, Frank

AU - Garbe, Anja

AU - Keller, Johannes

AU - Huang, Fan

AU - Duda, Georg

AU - Schmidt-Bleek, Kate

AU - Schaser, Klaus-Dieter

AU - Tsitsilonis, Serafeim

PY - 2018/3/1

Y1 - 2018/3/1

N2 - 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.

AB - 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.

KW - Animals

KW - Brain Injuries, Traumatic/complications

KW - Disease Models, Animal

KW - Female

KW - Femoral Fractures/complications

KW - Femur/injuries

KW - Fracture Healing/physiology

KW - Leptin/metabolism

KW - Mice

KW - Osteogenesis/physiology

KW - Osteotomy

M3 - SCORING: Journal article

C2 - 29504576

VL - 18

SP - 32

EP - 41

IS - 1

ER -