ABSTRACT
Abstract The objective of this study was to evaluate the effectiveness of various storage media at 20 °C in maintaining the viability of human periodontal ligament fibroblasts (HPLF) over time. HPLF were maintained at 20 °C in skim milk (SM), whole milk (WM), freshly prepared Hank's balanced salt solution (HBSS), Save-A-Tooth(r), natural coconut water (NCW), coconut water industrialized (ICW) and tap water (negative control) for 3, 6, 24, 48, 72, 96 and 120 h. Cells maintained in Minimal Essential Medium (MEM-37) at 37 °C served as a positive control. Cell viability was determined by MTT assay. Statistical analysis was performed by Kruskal-Wallis test and Scheffe test (α = 5%). From 24 h, NCW was significantly better in maintaining cell viability than all other tested storage media (p<0.05). SM and WM were significantly better than HBSS for up to 72 h. Save-A-Tooth(r) and ICW were the worst conservation storage media. In conclusion, the effectiveness of the tested storage media to maintain the viability of the periodontal ligament cells was as follows, in a descending order: NCW > MEM-37> SM and IM> HBSS> ICW > Save-A-Tooth(r)> tap water.
Resumo O objetivo deste estudo foi avaliar a efetividade de vários meios de conservação a 20 °C em manter a viabilidade de fibroblastos do ligamento periodontal humano (FLPH) ao longo do tempo. FLPH foram conservados a 20 °C em leite desnatado (LD), leite integral (LI), solução salina balanceada de Hank (HBSS) recém preparada, Save-A-Tooth(r) (Save), água de coco natural (ACN), água de coco industrializada (ACI) e água de torneira (água - controle negativo) por 3, 6, 24, 48, 72, 96 e 120 h. Células conservadas em Meio Essencial Mínimo (MEM-37) a 37 °C serviram como controle-positivo. A viabilidade celular foi determinada pelo ensaio MTT. A análise estatística dos dados foi realizada pelos testes Kruskal-Wallis e Scheffé (α=5%). A partir de 24 h, ACN foi significantemente melhor em manter a viabilidade celular do que todos os outros meios testados (p<0,05). LD e LI foram significantemente melhores do que a HBSS por até 72 h. Save e ACI foram os piores meios de conservação. Concluindo, a efetividade dos meios de conservação testados em manter a viabilidade das células do ligamento periodontal foi a seguinte em ordem decrescente: ACN > MEM-37 > LD e LI > HBSS > ACI > Save > água.
Subject(s)
Cocos , Fibroblasts/cytology , Temperature , Sodium ChlorideABSTRACT
Background: Sickle cell disease which is considered to be a hypercoagulable state has a worldwide distribution. Protein C is a naturally occurring anticoagulant with anti inflammatory and fibrinolytic properties. Objective: To evaluate the level of Protein C in Nigerian Patients with sickle cell anaemia (SCA) in steady state. Methods: This is a comparative cross sectional study carried out in Ibadan on 40 HbSS patients in steady state attending Haematology clinic at University College Hospital, Ibadan and 40 age and sex matched healthy normal HbAA control. Protein C was assayed with Amax Destiny Coagulometer using clot based method. Liver function test (LFT) was done with Hitachi 912. Results: A significant decrease in Protein C was found in HbSS patients in steady state (median value 62.8%) compared with HbAA control Subjects (74.6%) (p = 0.00). There was no significant difference in the LFT of the HbSS patients and the control HbAA subjects, P > 0.05 in all the parameters measured. (Alanine Transaminase (ALT), P = 0.82; Albumin, P = 0.12; Total Protein, P =0.37). Conclusion: The low Protein C level observed in HbSS patients in steady state may not be due to hepatic dysfunction as LFT in the subjects were found to be normal.
ABSTRACT
No abstract available.