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Isolation and culture of human adipose-derived mesenchymal stromal/stem cells harvested from postmortem adipose tissues.
Journal of Forensic and Legal Medicine 2019 October 17
Many cell types maintain their function short-term after death. Stem cells isolated from postmortem tissues have been successfully applied in transplantation studies. However, stem cell viability and stemness are reported to decline with increased time after death. Although postmortem stem cells may be useful for regenerative therapy and forensic diagnostics, their characteristic remain to be better understood. Adipose-derived mesenchymal stromal/stem cells (ASCs) have the capacity to differentiate through several cell lineages and are able to survive in an ischemic environment for a prolonged time. This study aimed to confirm whether human postmortem ASCs can be collected and culture-expanded from cadavers. Axilla subcutaneous adipose tissues were harvested during forensic autopsy and enzymatically digested to obtain a heterogeneous cell mixture, including the ASCs population. The mixture was seeded onto collagen-coated cell culture dishes and spindle-shaped adhesive and proliferative ASCs were confirmed. Senescent cells were also present, visualized as large and flattened cells. When maintained in a cool environment, ASCs were able to survive in the postmortem tissues for up to 7 days after death. We conclude that postmortem ASCs can be readily isolated and culture-expanded from adipose tissues.
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