A Conceptual Approach for Examining Effects of the Adolescent Bone Marrow Milieu on MSC Phenotype.

Autor: Kannikeswaran S; Department of Orthopaedic Surgery University of Michigan School of Medicine Ann Arbor MI USA.; Department of Physical Medicine and Rehabilitation University of Michigan Ann Arbor MI USA., Whitney DG; Department of Physical Medicine and Rehabilitation University of Michigan Ann Arbor MI USA.; Institute for Healthcare Policy and Innovation University of Michigan Ann Arbor MI USA., Devlin MJ; Department of Anthropology University of Michigan Ann Arbor MI USA., Li Y; Department of Orthopaedic Surgery University of Michigan School of Medicine Ann Arbor MI USA., Caird MS; Department of Orthopaedic Surgery University of Michigan School of Medicine Ann Arbor MI USA., Alford AI; Department of Orthopaedic Surgery University of Michigan School of Medicine Ann Arbor MI USA.
Jazyk: angličtina
Zdroj: JBMR plus [JBMR Plus] 2023 May 10; Vol. 7 (6), pp. e10740. Date of Electronic Publication: 2023 May 10 (Print Publication: 2023).
DOI: 10.1002/jbm4.10740
Abstrakt: Children with bone fragility often exhibit elevated bone marrow lipid levels, which may affect mesenchymal stem cell (MSC) differentiation potential and ultimately bone strength via cell-autonomous and/or non-cell-autonomous factors. Here, we use standard co-culture techniques to study biological effects of bone marrow cell-derived secretome on MSC. Bone marrow was collected during routine orthopedic surgery, and the entire marrow cell preparation, with or without red blood cell (RBC) reduction, was plated at three different densities. Conditioned medium (secretome) was collected after 1, 3, and 7 days. ST2 cells, a murine MSC line, were then cultured in the secretomes. Exposure to the secretomes was associated with reductions of up to 62% in MSC MTT outcomes that depended on the duration of secretome development, as well as marrow cell plating density. Reduced MTT values were not associated with diminished cell number and viability assessed using Trypan Blue exclusion. Expression of pyruvate dehydrogenase kinase 4 was modestly elevated, and β-actin levels were transiently reduced in ST2 cells exposed to secretome formulations that had elicited maximal reductions in MTT outcomes. The findings from this study can inform the design of future experimental studies to examine contributions of cell-autonomous and non-cell-autonomous factors in the bone marrow to MSC differentiation potential, bone formation, and skeletal growth. © 2023 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.
Competing Interests: The authors declare no conflicts of interest.
(© 2023 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.)
Databáze: MEDLINE
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