Abstract: The objective of this study was to compare bone marrow (BM) aspirates from the sternum and the tuber coxae of middle-aged horses. Bone marrow was obtained from the sternum and both tubera coxae of 12 healthy, 13-year-old geldings. Two different puncture techniques were used for the tuber coxae. The 2 syringes used for sternal sampling were evaluated separately. The mononuclear cell (MNC) fraction of the BM was isolated and the mesenchymal stem cells (MSCs) were culture-expanded. At the sternum, BM aspiration was always possible. Bone marrow aspiration at the tuber coxae required straight and deep needle penetration combined with high negative pressure. With this technique a median sample amount of 11.0 mL with large individual variation was obtained. A median of 3.06 × 10(6) MNC/mL BM (1st syringe) and 2.46 × 10(6) MNC/mL BM (2nd syringe) was isolated from sternal samples. In contrast, the tuber coxae yielded a median of 0.27 × 10(6) MNC/mL BM. The first passage yielded a median of 2.19 × 10(6) MSC (1st syringe) and 1.13 × 10(6) MSC (2nd syringe) from sternal samples, compared to a significantly lower median number of MSC from tuber coxae BM (0.06 × 10(6) MSC). The number of MNC and MSC obtainable from the BM aspirates taken from the tuber coxae is significantly lower than that obtained from the sternal BM aspirates. Autologous BM for the equine athlete is particularly clinically relevant at an advanced age. Based on our findings, the tuber coxae cannot be recommended for BM aspiration in middle-aged horses. Cette étude visait à comparer les aspirations de moelle osseuse (MO) provenant du sternum et de la tubérosité de la hanche de chevaux d’âge moyen. La MO fut obtenue du sternum et des deux tubérosités de la hanche de 12 hongres âgés de 13 ans. Deux techniques de ponctions différentes ont été utilisées pour la tubérosité de la hanche. Les 2 seringues utilisées pour l’échantillonnage du sternum furent évaluées séparément. La fraction des cellules mononucléaires (MNC) de la MO a été isolée et les cellules souches mésensychamenteuses (CSM) ont été multipliées par culture. À partir du sternum, les aspirations de MO étaient toujours possibles. L’aspiration de moelle osseuse à partir de la tubérosité de la hanche nécessitait de combiner une pénétration droite et profonde de l’aiguille ainsi qu’une pression négative élevée. Au moyen de cette technique une quantité médiane de 11,0 mL d’échantillon était obtenue, avec de grandes variations individuelles. Une quantité médiane de 3,06 × 10 CSM/mL de MO (1 seringue) et de 2,46 × 10 CSM/mL de MO (2 seringue) était obtenue à partir des échantillons du sternum. Ceci contrastait avec la médiane de 0,27 × 10 CSM/mL de MO obtenue de la tubérosité de la hanche. Une médiane de 2,19 × 10 CSM (1 seringue) et de 1,13 × 10 CSM (2 seringue) a été obtenu des échantillons provenant du sternum, comparativement à une quantité médiane significativement moindre de MSC provenant de la MO de la tubérosité de la hanche (0,06 × 10 CSM). Le nombre de cellules mononucléaires et de CSM pouvant être obtenues à partir d’aspiration de MO provenant de la tubérosité de la hanche est significativement plus bas que celui obtenu à partir d’une aspiration de MO provenant du sternum. Pour un athlète équin, de la MO homologue a une signification clinique particulière chez un animal plus âgé. Selon nos trouvailles, la tubérosité de la hanche ne peut être recommandée pour une aspiration de MO chez des chevaux d’âge moyen. (Traduit par Docteur Serge Messier)
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This study focuses on comparing the effectiveness of bone marrow aspiration from two different locations in middle-aged horses: the sternum and the tuber coxae. Results showed that bone marrow aspiration was always successful from the sternum, while aspiration at the tuber coxae was found to be less reliable and yielded significantly lower numbers of mononuclear cells and mesenchymal stem cells.
Study Objective and Methodology
The purpose of this study was to examine the differences between bone marrow aspirates obtained from the sternum and the tuber coxae (hip bone) of middle-aged horses.
The study involved 12 healthy, 13-year-old geldings (castrated male horses) from which bone marrow was extracted from the sternum and both sides of the tuber coxae.
Two different puncture methods were used for retrieving bone marrow from the tuber coxae and the two syringes used for the sternum were evaluated separately
The fractions of mononuclear cells (MNC) and mesenchymal stem cells (MSC) were isolated and culture-expanded for thorough examination.
Key Findings
The bone marrow aspiration was always successful when conducted on the sternum.
The aspiration from the tuber coxae required a straight and deep needle penetration combined with a high level of negative pressure.
The amount of sample gathered from the tuber coxae using this technique had a median volume of 11.0 mL and varied significantly among individuals.
The median count of MNC and MSC from the sternal samples was markedly higher compared to those from the tuber coxae.
The findings strongly suggest that the number of MNC and MSC obtainable from the bone marrow aspirates retrieved from the tuber coxae is significantly lower than that obtained from the sternum.
Conclusion and Clinical Relevance
For the equine athlete, autologous bone marrow – bone marrow from the same individual – is particularly relevant at an advanced age.
Considering the gathered data, the researchers do not recommend the tuber coxae as a suitable location for bone marrow aspiration in middle-aged horses due to the significantly lower yield of MNC and MSC compared to those obtained from the sternum.
Cite This Article
APA
Delling U, Lindner K, Ribitsch I, Jülke H, Brehm W.
(2012).
Comparison of bone marrow aspiration at the sternum and the tuber coxae in middle-aged horses.
Can J Vet Res, 76(1), 52-56.
Large Animal Clinic for Surgery, Faculty of Veterinary Medicine, University of Leipzig, An den Tierkliniken 21, 04103 Leipzig, Germany. delling@vetmed.uni-leipzig.de
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