Establishment of Down’s syndrome periodontal ligament cells by transfection with SV40T-Ag and hTERT

Down’s syndrome is one of the most common human congenital genetic diseases and affected patients have increased risk of periodontal disease. To examine involvement of the disease with periodontal disease development, we established immortalized periodontal ligament cells obtained from a Down’s syndrome patient by use of SV40T-Ag and hTERT gene transfection. Expressions of SV40T-Ag and hTERT were observed in periodontal ligament cell-derived immortalized cells established from healthy (STPDL) and Down’s syndrome patient (STPDLDS) samples. Primary cultured periodontal ligament cells obtained from a healthy subject (pPDL) had a limited number of population doublings (< 40), while STPDL and STPDLDS cells continued to grow with more than 80 population doublings. Primary cultured periodontal ligament cells obtained from the patient showed a chromosome pattern characteristic of Down’s syndrome with trisomy 21, whereas STPDLDS samples showed a large number of abnormal chromosomes in those results. Gene expression analysis revealed that expression of DSCR-1 in STPDLDS is greater than that in STPDL. These results suggest that the newly established STPDLDS cell line may be a useful tool for study of periodontal disease in Down’s syndrome patients.

REGENERASI SEL LIGAMEN PERIODONTAL DENGAN KOLAGEN SISIK IKAN NILA (Oreochromis niloticus)

Background : Regeneration of periodontal ligament cells with tilapia scales collagen (Oreochromis niloticus) is one of the therapies that can be used in the field of periodontics. This review aims to explain the mechanism of periodontal ligament cell regeneration using tilapia scales (Oreochromis niloticus) collagen.Methods : Literature collection is done by selecting journals or articles through PubMed, NCBI, and Google Scholar based on keywords that match the author's criteria.Results : Regeneration of cells using collagen from tilapia scales can be used by using a bone graft technique because fish collagen contains calcium and phosphate that resembles human, namely hydroxyapatite (HAP). Fish scales are an alternative source of type I collagen and have the potential to be an alternative material for bone graft.Conclusions : Regeneration of periodontal ligament cells using tilapia scale collagen can be done using bone graft techniques. Fish scales have many benefits apart from having almost the same content as humans as well as materials that are still easy to obtain and a more economical price to use. The authors suggest that the researchers further conduct further research on the preparation of tilapia scales so that they can be applied in tissue engineering actions in the field of periodonsia.