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      Multilineage cells from human adipose tissue: implications for cell-based therapies.

      Tissue engineering

      Adipocytes, cytology, Adipose Tissue, Animals, Apoptosis, Biological Therapy, Biomedical Engineering, Cell Aging, Cell Differentiation, Cell Line, Cell Lineage, Cell Separation, Chondrocytes, Fibroblasts, Flow Cytometry, Fluorescent Antibody Technique, Indirect, Humans, Immunohistochemistry, Lipectomy, Mesoderm, physiology, Mice, Muscle, Skeletal, Osteoblasts, Skin, Stem Cells, Stromal Cells, Transplantation, Autologous

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          Abstract

          Future cell-based therapies such as tissue engineering will benefit from a source of autologous pluripotent stem cells. For mesodermal tissue engineering, one such source of cells is the bone marrow stroma. The bone marrow compartment contains several cell populations, including mesenchymal stem cells (MSCs) that are capable of differentiating into adipogenic, osteogenic, chondrogenic, and myogenic cells. However, autologous bone marrow procurement has potential limitations. An alternate source of autologous adult stem cells that is obtainable in large quantities, under local anesthesia, with minimal discomfort would be advantageous. In this study, we determined if a population of stem cells could be isolated from human adipose tissue. Human adipose tissue, obtained by suction-assisted lipectomy (i.e., liposuction), was processed to obtain a fibroblast-like population of cells or a processed lipoaspirate (PLA). These PLA cells can be maintained in vitro for extended periods with stable population doubling and low levels of senescence. Immunofluorescence and flow cytometry show that the majority of PLA cells are of mesodermal or mesenchymal origin with low levels of contaminating pericytes, endothelial cells, and smooth muscle cells. Finally, PLA cells differentiate in vitro into adipogenic, chondrogenic, myogenic, and osteogenic cells in the presence of lineage-specific induction factors. In conclusion, the data support the hypothesis that a human lipoaspirate contains multipotent cells and may represent an alternative stem cell source to bone marrow-derived MSCs.

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          Journal
          11304456
          10.1089/107632701300062859

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