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COMPARATIVE STUDY
JOURNAL ARTICLE

The posterior iliac crest outperforms the anterior iliac crest when obtaining mesenchymal stem cells from bone marrow

Michela Pierini, Claudia Di Bella, Barbara Dozza, Tommaso Frisoni, Elisa Martella, Chiara Bellotti, Daniel Remondini, Enrico Lucarelli, Sandro Giannini, Davide Donati
Journal of Bone and Joint Surgery. American Volume 2013 June 19, 95 (12): 1101-7
23783207

BACKGROUND: The clinical application of freshly isolated connective-tissue progenitors, as well as the potential preparation of culture-expanded mesenchymal stem cell populations for therapeutic applications, will benefit from clinical methods that maximize the yield of the starting population. We compared the number of cells, concentration, and prevalence of colony-founding connective-tissue progenitors from the anterior and posterior iliac crest. In addition, we compared the expansion kinetics and multilineage differentiation potential of their culture-expanded progeny when processed to form mesenchymal stem cells.

METHODS: Marrow aspirate was collected from both the anterior and posterior iliac crest of twenty-two patients. The concentration and prevalence of colony-founding connective-tissue progenitors were estimated with use of a colony formation assay. The expansion kinetics and multilineage differentiation potential of the culture-expanded mesenchymal stem cell populations derived from these starting samples were compared.

RESULTS: The yield of colony-founding connective-tissue progenitors was 1.6 times greater in the posterior compared with the anterior iliac crest. No differences were found with respect to the viability, phenotype, expansion kinetics, or multilineage differentiation potential of mesenchymal stem cell populations derived from these two sites.

CONCLUSIONS: The concentration and yield of colony-founding connective-tissue progenitors were greater when aspirate was obtained from the posterior compared with the anterior iliac crest, whereas the biological potential of the cells derived from these sites appeared comparable.

CLINICAL RELEVANCE: The harvesting of bone marrow from the posterior iliac crest appears to be preferred, as it provided a modestly higher concentration of colony-founding connective-tissue progenitors than comparable aspirate from the anterior iliac crest.

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