Beheshteh Malekafzali; Mandana Sattari; Sanaz Keyvanfar
Abstract
Background: Early childhood caries (ECC) is a common health problem in the developing countries. Basic knowledge about the etiology and pathogenesis of ECC plays an important role in its prevention. Objective: To determine the relationship between salivary TLR-2 concentration and early childhood caries ...
Read More
Background: Early childhood caries (ECC) is a common health problem in the developing countries. Basic knowledge about the etiology and pathogenesis of ECC plays an important role in its prevention. Objective: To determine the relationship between salivary TLR-2 concentration and early childhood caries formation Methods: Twenty-Eight children with ages ranging from 36 to 71 months (15 in ECC group and 13 in caries free group) were chosen based on inclusion criteria. Their saliva was aspirated in the volumes of 1-2 ml. Resampling was done for 8 subjects of ECC group 3 months after dental restoration. TLR-2 concentration was measured using ELISA. Results: Mean concentrations of TLR-2 in ECC and caries free group were 2.12 and 1.42 ng/ml, respectively. The difference between concentrations was statistically significant (p=0.008). Three months after treatment in 8 ECC, the mean concentration of TLR-2 (0.925 ng/ml) significantly decreased compared to the original concentration in ECC (p<0.001) and caries free groups (p<0.001). Conclusion: Elevated concentration of TLR-2 in ECC group compared to caries free group and its decrease after treatment point to the participation of innate immune system and specially TLR-2 in the pathogenesis of early childhood caries.
Seyed Javad Hasheminia; Sayyed Hamid Zarkesh-Esfahani; Sepideh Tolouei; Vahid Shaygannejad; Hedaiatallah Shirzad; Morteza Hashemzadeh Chaleshtory
Abstract
Background: Multiple sclerosis (MS) is a T cell mediated autoimmune disease with unknown etiology. Appropriate MS therapeutic strategies need thorough understanding of both disease etiology and pathogenesis mechanisms. Ligation of TLR-2 and TLR-4 stimulates the production of several cytokines leading ...
Read More
Background: Multiple sclerosis (MS) is a T cell mediated autoimmune disease with unknown etiology. Appropriate MS therapeutic strategies need thorough understanding of both disease etiology and pathogenesis mechanisms. Ligation of TLR-2 and TLR-4 stimulates the production of several cytokines leading to CNS autoimmunity and neurodegenerative diseases. Objective: To find a relationship between MS disability and TLR-2 and TLR-4 expression on mononuclear cells in the blood of MS patients. Methods: Forty-five new case (NC) MS patients (33 females and 12 males) and 45 age and gender-matched healthy controls (HC) were recruited to the study. PBMCs were prepared and the expressions of TLR-2 and TLR-4 were assessed by flowcytometry technique using appropriate monoclonal antibodies. Results: Our results showed that the expression of TLR-2 and TLR-4 proteins in the patients group was significantly higher than that of healthy controls. TLR-2 but not TLR-4 was correlated with expanded disability status scale (EDSS) scores. Conclusion: High expressions of TLR-2 and TLR-4 may represent a state of innate immune activation in patients with MS.
