Document Type : Research Articles
Authors
- Maryam M. Matin 1
- Maryam Alavi 1
- Homa Mollaei 2
- Nasser Mahdavi-Shahri 1
- Masoud Fereidoni 1
- Roya Lari 1
1 Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
2 Department of Biology, Faculty of Sciences, University of Birjand, Birjand, Iran
Abstract
Collagen bioscaffolds give promising results in oral mucosa engineering due to high biocompatibility and biodegradability of collagen. Because of high collagen content of gingiva, it can be used to prepare a natural collagen scaffold. Hyaluronic acid (HA) is one of the major components of extracellular matrix that regulates cellular behaviors. In the present study, the effects of HA on the behavior of adipose-derived mesenchymal stem cells (Ad-MSCs) cultured on decellularized gingival matrix were investigated by histological methods. Human gingival tissue (5×5×5 mm) was decellularized using physical methods as well as treatment with sodium dodecyl sulfate (SDS) and Triton X-100, followed by washing and sterilization procedures. Scaffolds were divided into two separate groups including soaked scaffolds in HA (0.3% solution) and scaffolds without HA as controls. In the next step, 3×105 Ad-MSCs were seeded on each scaffold in both groups, and finally, histological studies were performed after 1, 2, 3 and 4 weeks of culture. Histological studies revealed cell elimination and also preservation of collagen fibers in the decellularized gingival connective tissue. In vitro analysis of cellular behaviors showed adhesion and also migration of human Ad-MSCs towards connective tissue matrix, as well as formation of epithelial-like structures. Totally, statistical analyses indicated significant differences in cell density (P<0.01), migration (P<0.001) and nuclear size (P<0.01) at week one in HA-treated scaffolds versus the control group. The results of present study demonstrated that the extracellular matrix of decellularized human gingival stroma can induce cellular behaviors such as adhesion, proliferation and migration of human Ad-MSCs.
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