Cancer immunotherapy, especially treatment with monoclonal antibodies (mAbs) that block programmed cell death-1 (PD-1)/programmed death-ligand 1 (PD-L1) signaling, has attracted attention as a new therapeutic option for cancer. However, only limited number of patients have responded to this approach. In study, we searched compounds enhance the efficacy anti-PD-1 mAb using mixed lymphocyte react...

Background: Tumor necrosis factor alpha (TNF-α) is a primary mediator of immune regulation and might be required in the early stages of DC development from CD34+ cells. However, details of optimal timing of exposure to TNF-α in DC development process in monocytes or non-purified hematopoitic cells are still lacking and clear benefits of this approach to the development of DCs remain to be valid...

Background: Mesenchymal stem cells (MSCs) possess a wide range of immunomodulatory functions mostly in immune cells including dendritic cells (DCs). DCs are the key cells in the immune response and play an important role in initiating cell-mediated immunity. Objective: To evaluate the immunomodulatory effects of MSCs supernatant on maturation and function of DCs. Methods: Bone marrow derived m...

Indoleamine 2,3-dioxygenase (IDO), an enzyme involved in the catabolism of tryptophan, is expressed by a variety of cells and tissues such as macrophages, dendritic cells, cells of the endocrine system and by the placenta. IFN- γ is the main inducer of this enzyme. IDO acts as an important defense mechanism of innate immunity against pathogens. It also has tumor suppressive activity and prolong...

Crohn's disease (CD) is an inflammatory disease of the gastrointestinal tract (GIT) tract and can affect several parts of the digestive system. There is a relationship between impaired mucosal barrier in the GIT of inflammatory bowel disease patients and the role of bacteria such as Mycobacterium avium paratuberculosis in CD. Apart from different therapeutic approaches for treating CD, developm...

introduction: enrichment of intact peripheral blood dendritic cells (dcs) has been done using rosette and immunomagnetic depletion techniques. material and methods: peripheral blood mononuclear cells were separated using ficoll density gradient centrifugation and t lymphocytes were depleted through reaction with aet- treated sheep red blood cells. the remaining cells were depleted from lineage ...

background: fusion of dendritic cells (dcs) with melanoma cells could reinforce the antigenicity of tumors as a strategy for the treatment of malignant melanoma. however, the insufficient quantity of dcs and the low fusion efficiency limits the development of such approach. objective: to define the dosage of the stimulating factors as well as the induction condition for the optimal dcs preparat...

Dendritic cells are the professional antigen presenting cells of innate immunity and key players in maintaining the balance of immune responses. Studies with dendritic cells are mainly limited by their low numbers in vivo and their difficult maintenance in vitro. We differentiated bone marrow cells from transgenic mice expressing an inducible SV40 large T-antigen into dendritic cells. When immo...

cd19 is expressed on b- lineage cells and follicular dendritic cells and plays a key role in b cell malignancies and autoimmune diseases. thus, it has been considered as potential target for several monoclonal antibodies (mabs). for decades, chemotherapy has been known as one of the major antitumor therapies eradicating high proliferative tumor cells. but, anti- cd19 mabs developed for treating...