Positive effects of hypoxic preconditioning of the extracellular matrix and stromal vascular fraction from adipose tissue

Béatrice Dirat; Valérie Samouillan; Jany Dandurand; Jean-Pierre Gardou; Valérie Walter; Véronique Santran

doi:10.1016/j.jpra.2023.09.007

Positive effects of hypoxic preconditioning of the extracellular matrix and stromal vascular fraction from adipose tissue

JPRAS Open. 2023 Sep 30:38:173-185. doi: 10.1016/j.jpra.2023.09.007. eCollection 2023 Dec.

Authors

Béatrice Dirat¹, Valérie Samouillan², Jany Dandurand², Jean-Pierre Gardou³, Valérie Walter⁴, Véronique Santran¹

Affiliations

¹ SYMBIOKEN, 42 avenue du Général de Croutte, 31100 Toulouse, France.
² PHYPOL, CIRIMAT, Institut Carnot Chimie Balard CIRIMAT, Université de Toulouse, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse, France.
³ LAPLACE, Université de Toulouse, CNRS, INPT, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse, France.
⁴ Department of Plastic and Reconstructive Surgery, Clinique la Croix du Sud, 31130 Quint Fonsegrive, France.

Abstract

Background: Numerous approaches have been developed to decelerate the aging process of facial skin. Synthetic fillers and cell-enriched fat grafts are the main procedures employed to fill wrinkles.

Objective: The aim of this study was to evaluate the in vitro and in vivo safety and efficiency of a new process developed by SYMBIOKEN: the AmeaCell, which facilitates the extraction of the stromal vascular fraction (SVF) and the associated hypoxia pre-conditioned matrix to promote fat graft survival.

Methods: The AmeaCell device allows the extraction from adipose tissue of SVF and pre-conditioned MatriCS and promotes a hypoxic environment. Experiments were carried out on human cells and then in mice.

Results: Characterization of cells and MatriCS showed that after their extraction using the new process developed by SYMBIOKEN, the extracted cells expressed stem-cell markers. The presence of characteristic proteins and lipid fractions found in the adipose matrix were confirmed in MatriCS. Cobalt chloride treatment of the matrix using the AmeaCell device induced modifications in the matrix composition with a decrease in laminin and without collagen modification, both of which promote adhesion and differentiation of SVF or adipose-derived stromal cells. The combination of MatriCS and SVF (1 × 10⁶ and 5 × 10⁶, respectively) is safe and efficient to fill winkles induced by UVB irradiation. The cross-talk between MatriCS and SVF can act a durable filler compared to the filling performed using cells or matrix or fat alone, which need to be replaced frequently.

Conclusion: These results indicate that the combination of MatriCS and SVF is safe and effective as a biological filler for achieving skin rejuvenation and wrinkle filling.

Keywords: Collagen; Extracellular matrix; Hypoxia; SVF; Stem cells.