Aim Of Study: After the treatment of tumors, we often encounter a minimal residual sickness. However, the elimination of these leftover tumor cells is crucial for the patient. In the past years one of the most discussed options for this treatment is Imunotherapy, mainly by Dendritic cells. Dendritic cells are the most efficient cells out of the antigen presenting cell group.
Methods And Results: In the first part of the project, we perfected a technique of inducting a tumor on an experimental model. We inducted the tumor by the use of Carcinogenic substances or with the help of the Sarkom line imortalized fibroblasts. Another important part of the project was perfecting the method for the preparation of undeveloped dendritic cells from periphery blood monocytes. After these significant procedures were developed and perfected we moved onto the main part of the study. The Induction of a tumor by the carcenogenic substances Ethylennitrosamin and Phenobarbital was successful only in 20 % of the cases and therefore, was unusable for our experiment. We inducted the tumors with the Sarkom line method. After the application of dendritic cells into the tumor, a decrease in the development of the growth of the tumor was achieved.
Conclusion: Imunotherapy using dendritic cells as a basis for treatment is a perspective method for treatment of tumors.
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Front Immunol
January 2025
IrsiCaixa, Badalona, Spain.
Introduction: HIV-1 exploits dendritic cells (DCs) to spread throughout the body via specific recognition of gangliosides present on the viral envelope by the CD169/Siglec-1 membrane receptor. This interaction triggers the internalization of HIV-1 within a structure known as the sac-like compartment. While the mechanism underlying sac-like compartment formation remains elusive, prior research indicates that the process is clathrin-independent and cell membrane cholesterol-dependent and involves transient disruption of cortical actin.
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January 2025
Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen 518055, China.
Dendritic cells (DCs) are key cellular components of the immune system and perform critical functions in innate and acquired immunity. In mammals, it is generally believed that DCs originate exclusively from hematopoietic stem cells (HSCs). Using a temporal-spatial resolved fate-mapping system, here we show that in zebrafish, DCs arise from two sources: dorsal aorta-born endothelium-derived hematopoietic progenitors (EHPs) and HSCs.
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January 2025
Veterinary Diagnostic Laboratory-Microbiology, Immunology, Pathology, Colorado State University, Fort Collins, CO, USA.
An 8-y-old, spayed female Bernese Mountain Dog was presented to a referral center for evaluation of right thoracic limb lameness and previously suspected Evans syndrome that had been poorly responsive to immunosuppressive therapy. Based on review of examination findings and laboratory data, Evans syndrome was deemed unlikely and hemophagocytic histiocytic sarcoma (HHS) was strongly suspected. On blood smear evaluation, atypical, histiocytic cells were noted, some of which exhibited siderophagia.
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January 2025
Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Environmental Science and Engineering, College of Biology, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, 410082, China.
During cancer peritoneal metastasis (PM), conventional antigen-presenting cells (dendritic cells, macrophages) promote tumorigenesis and immunosuppression in peritoneal cavity. While intraperitoneal immunotherapy (IPIT) has been used in clinical investigations to relieve PM, the limited knowledge of peritoneal immunocytes has hindered the development of therapeutic IPIT. Here, a dendritic cell-independent, next-generation IPIT is described that activates peritoneal cavity B (PerC B) cell subsets for intraperitoneal anti-tumor immunity via exogenous antigen presentation.
View Article and Find Full Text PDFTransplantation
January 2025
Department of Surgery, Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh PA.
Reduced dependence on antirejection agents, improved long-term allograft survival, and induction of operational tolerance remain major unmet needs in organ transplantation due to the limitations of current immunosuppressive therapies. To address this challenge, investigators are exploring the therapeutic potential of adoptively transferred host- or donor-derived regulatory immune cells. Extracellular vesicles of endosomal origin (exosomes) secreted by these cells seem to be important contributors to their immunoregulatory properties.
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