摘要:
The present inventors worked on elucidating the mechanism of antigen cross-presentation by dendritic cells, and revealed that foreign antigens taken up in dendritic cells are degraded by proteasomes after undergoing polyubiquitination. Based on the novel finding that polyubiquitination is involved in cross-presentation, the promotion of polyubiquitination was attempted by a number of methods, and the promotion of antigen presentation was confirmed. These methods enable the production of dendritic cells effective for inducing CTL activation.
摘要:
The present inventors worked on elucidating the mechanism of antigen cross-presentation by dendritic cells, and revealed that foreign antigens taken up in dendritic cells are degraded by proteasomes after undergoing polyubiquitination. They discovered a positive correlation between the uptake amount of an antigenic protein by dendritic cells or the level of polyubiquitination and the level of antigen presentation of the antigenic protein. Based on these findings, methods were developed for predicting the intensity of cross-presentation of an anti genic protein by measuring the amount of antigenic protein taken up or polyubiquitinated protein. The use of these methods allows selecting antigenic proteins that are readily presented as antigens from among a number of proteins. The methods of the present invention enable suitable cancer immune vaccines to be provided through selection of more suitable cancer-specific proteins.
摘要:
An objective of the present invention is to provide methods for selecting candidate peptides presented on the surface of cancer cells following binding to MHC class I molecules, wherein the peptides are involved in the stimulation of T cell immunity (cellular immunity). The present inventors discovered a new principle of MHC I-mediated antigen presentation in which a T cell antigen epitope is more efficiently presented on MHC I molecules when it is positioned at the N-terminal side than when positioned at the C-terminal side.
摘要:
A search was conducted for functional antibodies that endogenously regulate cytokines, focusing on the relationship between inflammatory diseases and cytokines. Mice were immunized with a human peripheral blood monocyte fraction and the obtained antibodies were examined for a cytokine-regulating effect. As a result, of these antibodies, antibody #33 was confirmed to inhibit the production of numerous typical inflammatory cytokines. When, at the same time, the promoting effect of antibody #33 on IL-10 production was examined, it was revealed that antibody #33 has an effect of accelerating IL-10 production but no activity to induce an excessive IL-10 production. The antigen of this promising antibody was verified to be CD61. Therefore, it is conceivable that when anti-CD61 antibodies are applied to the treatment of inflammatory diseases, they would become pharmaceuticals with both a definite efficacy and a high safety.
摘要:
It has been found out that among antibodies showing reactivity with wild type TGF-α, antibodies less reactive with G79A-substituted TGF-α have an excellent growth-suppressing effect on cancer cells having a mutated Ras gene. Further, it has been found out that most of these antibodies have an activity of inhibiting EGFR tyrosine phosphorylation and/or an induction-suppressing activity on vascular endothelial cells.
摘要:
It has been found out that among antibodies showing reactivity with wild type TGF-α, antibodies less reactive with G79A-substituted TGF-α have an excellent growth-suppressing effect on cancer cells having a mutated Ras gene. Further, it has been found out that most of these antibodies have an activity of inhibiting EGFR tyrosine phosphorylation and/or an induction-suppressing activity on vascular endothelial cells.
摘要:
The present invention provides HIDE1 as novel monocyte markers. Since HIDE1 are membrane proteins, monocytes can be specifically detected by using antibodies that bind to HIDE1. Further, HIDE1-positive monocytes can also be collected from peripheral blood or the like using a cell sorter, magnet, or such. Monocytes that can be prepared based on the present invention are useful in cell immunotherapy.
摘要:
The present invention provides methods for producing hematopoietic stem cells or vascular endothelial precursor cells, wherein the methods comprise the step of separating PCLP1-positive cells from the hematopoietic tissues of an individual, and then culturing the obtained cells. PCLP1-positive cells obtained from the hematopoietic tissues of an individual can be cultured for a long time, and during culture they produce large quantities of hematopoietic stem cells or vascular endothelial precursor cells. The hematopoietic stem cells or vascular endothelial precursor cells obtainable by the present invention can be utilized for regenerative medicine.