MicroRNAs and Periodontal Disease: Helpful Therapeutic Targets?

Periodontal disease is the most common oral disease. This disease can be considered as an inflammatory disease. The immune response to bacteria accumulated in the gum line plays a key role in the pathogenesis of periodontal disease. In addition to immune cells, periodontal ligament cells and gingival epithelial cells are also involved in the pathogenesis of this disease. miRNAs which are small RNA molecules with around 22 nucleotides have a considerable relationship with the immune system affecting a wide range of immunological events. These small molecules are also in relation with periodontium tissues especially periodontal ligament cells. Extensive studies have been performed in recent years on the role of miRNAs in the pathogenesis of periodontal disease. In this review paper, we have reviewed the results of these studies and discussed the role of miRNAs in the immunopathogenesis of periodontal disease comprehensively. miRNAs play an important role in the pathogenesis of periodontal disease and maybe helpful therapeutic targets for the treatment of periodontal disease

Evaluation of the Potential Antioxidant Role of High-Density Lipoprotein-Cholesterol (HDL-C) in Patients with Ulcerative Colitis

Background Ulcerative colitis is a common type of inflammatory bowel disease (IBD). The aim of the present study was to examine the relationship between lipid profile, especially high-density lipoprotein (HDL), and malondialdehyde (MDA) level in patients with ulcerative colitis. Methods In this study, 45 patients with ulcerative colitis were selected, 25 of whom were diagnosed with active disease and 20 were in clinical remission. Moreover, 45 healthy subjects were selected as the controls. The status of serum lipid profile and MDA level were measured via precise photometric methods. The obtained data were analyzed, using independent t-test and correlation coefficient test. P < 0.05 was considered statistically significant. Results The serum level of HDL-C decreased, while the serum level of MDA significantly increased in patients with ulcerative colitis in comparison with the healthy controls (P < 0.05). No significant correlation was observed between the MDA level and triglyceride, cholesterol, and LDL-C levels in patients with ulcerative colitis. However, a significant inverse correlation was observed between HDL-C and MDA levels (r, -0.306; P < 0.05). Conclusions The inverse correlation between HDL-C and MDA levels can be regarded as an indicator of the protective role of HDL-C against lipid peroxidation in ulcerative colitis. In patients with ulcerative colitis, the serum level of HDL-C decreased in comparison with healthy subjects. Therefore, it is necessary to determine the HDL-C level in patients with ulcerative colitis