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Cell sheet technique possess the properties of conserving the ECM, rich molecules and retaining cell vitality, and will promote the capacity of cell adhesion and proliferation. The stem cell based cell sheet therapy has been utilized in many fields and scored the satisfactory results. Periodontitis is a chronic disease which causes the destruction of the periodontal tissue and leads to the teeth loss in the end. The routine cell-based therapy to the periodontitis was confronted with many difficulties. In the investigators previous preclinical research, +the investigators fabricated periodontal ligament stem cell (PDLSC) pellets and cell sheet fragment and applied them in the periodontal defect area for tissue regeneration and periodontitis treatment. And the investigators carried out a comprehensive study of the PDLSC allograft. The host responses and implanted cell fates were recorded. After the scientific investigation of the preclinical study, the investigators designed the preliminary clinical trial of PDLSC cell sheet for the chronic periodontitis therapy in the aims to test the PDLSC fates and explore one ideal transplantation mode.
our protocol mainly includes following steps:
1. select periodontitis patients :all patients were given the comprehensive examination on the oral condition including clinical examination, radiological evaluation and the immune system tests
2. select healthy donor teeth for PDLSC isolation and expansion.
3. fabricate the cell sheet and prepare the PDLSC cell sheet pellets and cell sheet fragment.
4. patients given the routine mechanical and chemical treatment for 4 weeks were randomized divided into 4 groups according to the visit time: i) the cell sheet fragment plus bio-ss transplantation; ii) the cell sheet pellets plus bioss transplantation; iii) the bio-ss transplantation and iv) the control.
5. all the operations were carried out as the routine GBR procedures.
6. the clinical, radiological examination and the changes of the immune system at the point of 1 day before and 4weeks, 12weeks, 24weeks and one year after the intervention were recorded and compared.
Allocation: Non-Randomized, Control: Placebo Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment
cell sheet pellets and cell sheet fragment
Research and Develop Center for Tissue Engineering, Fourth Military Medical University
Active, not recruiting
Fourth Military Medical University
Published on BioPortfolio: 2014-08-27T03:15:23-0400
The aim of this trials investigates the therapeutic effects of application autologous oral mucosal epithelial cell sheets in the treatment of limbal stem cell deficiency disease.
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Cell-cell junctions that seal adjacent epithelial cells together, preventing the passage of most dissolved molecules from one side of the epithelial sheet to the other. (Alberts et al., Molecular Biology of the Cell, 2nd ed, p22)
Chronic inflammation and loss of PERIODONTIUM that is associated with the amount of DENTAL PLAQUE or DENTAL CALCULUS present. Chronic periodontitis occurs mostly in adults and was called adult periodontitis, but this disease can appear in young people.
A zinc finger motif of approximately 30 amino acids with the general sequence X2-Cys-X2,4-Cys-X12-His-X3,4,5-His that forms a simple beta sheet-beta sheet-alpha helix fold stabilized by zinc ions. It recognizes and binds to a variety of eukaryotic DNA sequences and is very common among sequence-specific DNA BINDING PROTEINS and TRANSCRIPTION FACTORS.
Inflammation and loss of connective tissues supporting or surrounding the teeth. This may involve any part of the PERIODONTIUM. Periodontitis is currently classified by disease progression (CHRONIC PERIODONTITIS; AGGRESSIVE PERIODONTITIS) instead of age of onset. (From 1999 International Workshop for a Classification of Periodontal Diseases and Conditions, American Academy of Periodontology)
A conserved, approximately 50 amino acid, protein sequence that adopts a characteristic strongly bent, five stranded anti-parallel beta-sheet barrel-like fold. The Tudor domain recognizes dimethylated ARGININE through its negatively-charged surface and occurs in many proteins that co-localize with RNA; RIBONUCLEOPROTEINS or SINGLE-STRANDED DNA complexes in the CELL NUCLEUS; MITOCHONDRIA; or KINETOCHORES.
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