sarcoidosis is a systemic granulomatous disorder of unidentified etiology, with a heterogeneous clinical presentation. it is characterized by a reduced delayed-type hypersensitivity to tuberculin and common antigens. the balance between th1, th17 and regulatory t(treg) cells controls t-cell proliferation and activation.the th17/treg ratio in the peripheral blood and bronchoalveolar lavage fluid...

Objective(s): This study aimed to investigate the role and the possible mechanisms involved in the immunoregulation of experimental periodontitis by Th17/Treg. Materials and Methods: Experimental periodontitis was established by silk thread ligation with Porphyromonasgingivalis daubing in the bilateral maxillary second molar of Male Sprague-Dawley (SD) rats. Alveolar bones were scanned by Micro...

Objective(s): Multiple sclerosis (MS) is considered as a chronic type of an inflammatory disease characterized by loss of myelin of CNS.Recent evidence indicates that Interleukin 17 (IL-17)-producing T helper cells (Th17 cells) population are increased and regulatory T cells (Treg cells) are decreased in MS. Despite extensive research in understanding the mechanism of Th17 and Treg differentiat...

objective: th17 cells are known to be involved in some types of inflammations and autoimmune disorders. rorc2 is the key transcription factor coordinating th17 cell differentiation. thus, blocking rorc2 may be useful in suppressing th17-dependent inflammatory processes. the aim was to silence rorc2 by specific sirnas in naïve t cells differentiating to th17. time-dependent expression of rorc2 a...

objective(s): systemic lupus erythematosus (sle) is a multi-factorial autoimmune disease which may be characterized by t lymphocytes dysfunctions. th17 cells have been identified as new effector cells, which play an important role in the pathogenesis. in recent years, immunomodulatory effect of vitamin d3 has been noticed. in the present experiment, the effect of vitamin d3 on the expression of...

conclusions the changes of treg and th17 cells and their associated cytokines were related to virological and biochemical responses. results in complete and partial-responders, treg cells frequencies and il-10, tgf-β1, il-23 levels were all decreased significantly after na therapy, while th17 cells and the il-17 levels were increased slightly. treg/th17 ratio was only dramatically declined in c...

T lymphocytes that are involved in cellular mediated immunity include two types known as TCD8+ (Cytotoxic T lymphocytes) and TCD4+ (helper T lymphocytes). TCD4+ has four main subtypes, including TH1, TH2, TH17, and Treg Lymphocytes.TH17 lymphocytes play a role in defense against microbes that TH1 and TH2 lymphocytes have not the ability to respond to them. The most important cytokines, which ar...

Objective(s): Th2 response is related to the aetiology of asthma, but the underlying mechanism is unclear. To address this point, the effect of nebulized inhalation of inactivated Mycobacterium phlei on modulation of asthmatic  airway  inflammation was investigated. Materials and Methods: 24 male BALB/c mice were randomly divided into three groups: control group (Group A), asthma model group (G...

Background: Polycystic ovary syndrome (PCOS) is considered as the most common cause of female infertility that affects 4-10% of women in the reproductive age. Previous studies have shown the role of a balanced immune response in a successful pregnancy and fertility. Objective: To investigate the T helper cells type 1 (Th1) /Th2/Th17/Treg paradigms in peripheral blood of infertile PCOS compared ...