A biologic composition for promoting
wound healing includes: a human
mesenchymal stem cell (MSC)-derived
extracellular matrix (ECM) biologic component, and a negatively charged
polymer, combined with the biologic component to form the biologic composition. A method of preparing the biologic composition thereof includes: (i) isolating human mesenchymal stem cells (MSC) and subjecting the MSC to hypoxia-priming in a xeno- and / or serum-free, or
chemically defined medium to stimulate the production of an MSC-derived biologic component with pro-angiogenic factors; (ii) aggregating and co-precipitating the MSC-derived biologic component with a negatively charged
polymer into a pericellular space of the MSC to produce an aggregated biologic component; (iii) assembling the aggregated biologic component and the negatively charged
polymer into an insoluble
extracellular matrix (ECM) by the MSC; and (iv) decellularizing the insoluble ECM to obtain the biologic composition comprising MicroParticles of Solidified Secretome (MIPSOS).