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Isolation and Characterisation of an Adipose-derived human mesenchymal stem cell line - 'CKC-Endeavour-1'.

Mesenchymal stem cells derived from adipose tissue (ADMSCs) are being increasingly considered in regenerative medicine-based clinical applications. Apart from possessing therapeutic applications themselves, ADMSCs also secrete a myriad of soluble factors which are promising candidates for treating several degenerative diseases such as osteoarthritis and neurodegenerative diseases, wound repair as well as for cosmeceutical purposes. In our research study, we successfully isolated ADMSCs in-house, now called CKC-Endeavour-1 from the lipoaspirate sample of a patient who underwent liposuction. The subsequent expansion of cells was performed in xeno-free and serum-free conditions and their characterisation was performed using tri-lineage differentiation studies. The levels of differentiation were assessed by staining and gene expression which was observed to be comparable between the in-house developed ADMSC cell line and the commercially purchased ADMSCs. Following characterisation, the secretory components from these MSCs, namely, conditioned media (ADMSC-CM) and exosomes (ADMSC-EXO) were harvested from CKC-Endeavour-1 under xeno-free, serum-free, and supplement-free conditions followed by lyophilisation in order to attempt to prolong its shelf-life. The comprehensive analysis of the secretome profile of ADMSC-CM using carried out using cytokine array and demonstrated the presence of 105 cytokines and growth factors. Also, clinical grade Izon columns were used to isolate the exosomes from ADMSC-CM obtaining exosomes in the size range of <200nm, analysed using nanoparticle tracking analysis. Overall, our study developed an ADMSC cell line, CKC-Endeavour-1, along with their CM and exosome (EXO) products under clinically safe conditions. Additionally, we have obtained a comprehensive understanding of the secreted factors present in the ADMSC-CM which could be further explored in detail to tap the best therapeutic benefits from them.