Abstract

Adipose-derived stem cells (ADSCs) are isolated from abundant adipose tissue and have the capacity to differentiate into multiple cell lineages. ADSCs have raised big interest in therapeutic applications in regenerative medicine and demonstrated to fulfill the criteria for a successful cell therapy. There are several methods for isolation of ADSCs from adipose tissue and cryopreservation of ADSCs. Here, novel methods for the isolation and cryopreservation of ADSCs are presented and focused. Microscopic pieces of adipose tissue were placed on transwell inserts, and the ADSCs were induced to migrate to the lower wells for 1 week. We compared the properties of our ADSCs with those isolated by enzymatic digestion and enzyme-free method of culture plate, and our ADSCs were found to be more stable and healthier. In addition, we proposed a novel cryoprotectant solution (FNCP) containing pectin and L-alanine, which was compared with standard cryoprotectant solution. Overall, our methods proved more useful for ADSCs isolation than other methods and did not require consideration of "minimal manipulation" by the U.S. Food and Drug Administration (FDA). Furthermore, our FNCP did not contain dimethyl sulfoxide and fetal bovine serum, therefore stable storage is possible in xeno-free and animal-free cryopreservation solutions.

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