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Favaretto F, Compagnin C, Cogliati E, Montagner G, Dell’Antonia F, Berna G, Vettor R, Milan G, Trojan D. Characterization of Human Subcutaneous Adipose Tissue and Validation of the Banking Procedure for Autologous Transplantation. Int J Mol Sci 2023; 24:8190. [PMID: 37175896 PMCID: PMC10179225 DOI: 10.3390/ijms24098190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/03/2023] [Accepted: 04/28/2023] [Indexed: 05/15/2023] Open
Abstract
Adipose tissue (AT) is composed of a heterogeneous population which comprises both progenitor and differentiated cells. This heterogeneity allows a variety of roles for the AT, including regenerative functions. In fact, autologous AT is commonly used to repair soft tissue defects, and its cryopreservation could be a useful strategy to reduce the patient discomfort caused by multiple harvesting procedures. Our work aimed to characterize the cryopreserved AT and to validate its storage for up to three years for clinical applications. AT components (stromal vascular fraction-SVF and mature adipocytes) were isolated in fresh and cryopreserved samples using enzymatic digestion, and cell viability was assessed by immunofluorescence (IF) staining. Live, apoptotic and necrotic cells were quantified using cytometry by evaluating phosphatidylserine binding to fluorescent-labeled Annexin V. A multiparametric cytometry was also used to measure adipogenic (CD34+CD90+CD31-CD45-) and endothelial (CD34+CD31+CD45-) precursors and endothelial mature cells (CD34-CD31+CD45-). The maintenance of adipogenic abilities was evaluated using in vitro differentiation of SVF cultures and fluorescent lipid staining. We demonstrated that AT that is cryopreserved for up to three years maintains its differentiation potential and cellular composition. Given our results, a clinical study was started, and two patients had successful transplants without any complications using autologous cryopreserved AT.
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Affiliation(s)
- Francesca Favaretto
- Department of Medicine, Internal Medicine 3, Padova Hospital, University of Padova, 35128 Padova, Italy
- Fondazione Banca dei Tessuti del Veneto (FBTV), 31100 Treviso, Italy
| | - Chiara Compagnin
- Department of Medicine, Internal Medicine 3, Padova Hospital, University of Padova, 35128 Padova, Italy
| | - Elisa Cogliati
- Fondazione Banca dei Tessuti del Veneto (FBTV), 31100 Treviso, Italy
| | - Giulia Montagner
- Fondazione Banca dei Tessuti del Veneto (FBTV), 31100 Treviso, Italy
| | - Francesco Dell’Antonia
- Unità Operativa Complessa di Chirurgia Plastica, ULSS2 Marca Trevigiana, 31100 Treviso, Italy
| | - Giorgio Berna
- Unità Operativa Complessa di Chirurgia Plastica, ULSS2 Marca Trevigiana, 31100 Treviso, Italy
| | - Roberto Vettor
- Department of Medicine, Internal Medicine 3, Padova Hospital, University of Padova, 35128 Padova, Italy
| | - Gabriella Milan
- Department of Medicine, Internal Medicine 3, Padova Hospital, University of Padova, 35128 Padova, Italy
| | - Diletta Trojan
- Fondazione Banca dei Tessuti del Veneto (FBTV), 31100 Treviso, Italy
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Linkova DD, Rubtsova YP, Egorikhina MN. Cryostorage of Mesenchymal Stem Cells and Biomedical Cell-Based Products. Cells 2022; 11:cells11172691. [PMID: 36078098 PMCID: PMC9454587 DOI: 10.3390/cells11172691] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/15/2022] [Accepted: 08/24/2022] [Indexed: 11/16/2022] Open
Abstract
Mesenchymal stem cells (MSCs) manifest vast opportunities for clinical use due both to their ability for self-renewal and for effecting paracrine therapeutic benefits. At the same time, difficulties with non-recurrent generation of large numbers of cells due to the necessity for long-term MSC expansion ex vivo, or the requirement for repeated sampling of biological material from a patient significantly limits the current use of MSCs in clinical practice. One solution to these problems entails the creation of a biobank using cell cryopreservation technology. This review is aimed at analyzing and classifying literature data related to the development of protocols for the cryopreservation of various types of MSCs and tissue-engineered structures. The materials in the review show that the existing techniques and protocols for MSC cryopreservation are very diverse, which significantly complicates standardization of the entire process. Here, the selection of cryoprotectors and of cryoprotective media shows the greatest variability. Currently, it is the cryopreservation of cell suspensions that has been studied most extensively, whereas there are very few studies in the literature on the freezing of intact tissues or of tissue-engineered structures. However, even now it is possible to develop general recommendations to optimize the cryopreservation process, making it less traumatic for cells.
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