Micronized acellular dermal matrix as an efficient expansion substrate and delivery vehicle of adipose-derived stem cells for vocal fold regeneration.

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Objectives/hypothesis Cell therapy has been shown to prevent vocal fold scarring and atrophy. However, problems that include the expansion of large numbers of cells in vitro and the poor survival of transplanted cells in vivo must be solved. The aim of this study was to use micronized acellular dermal matrix (MADM) as an expansion substrate of rabbit allogeneic adipose-derived stem cells (ADSCs) and to apply the combination of the matrix and cells, ADSC-MADM, to vocal fold regeneration. Study design Animal experiment. Methods The proliferation of ADSCs that were cultured on the MADM was evaluated using 3-(4,5-dimethylthizazol-2-yl)-5-(3-carboxymethoxy-phenyl)-2-(4-sulfonyl)-2H-tetrazolium, and a rabbit acute vocal fold injury model was established by laser injury. Eighteen New Zealand white rabbits were randomly divided into three groups, which were injected with ADSC-MADM, ADSCs, and MADM, respectively. Morphological analysis was performed by laryngoscope, and histological analyses were indicated by hematoxylin and eosin staining, van Gieson staining, and immunofluorescence. Additionally, the in vivo survival of the ADSCs was determined by CM-Dil cell labeling. Results When compared with a two-dimensional culture, the MADM significantly promoted proliferation of ADSCs. Morphological and histological analyses indicated that, when compared to only using of MAMD or the nontreatme

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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