Phenotypic and functional heterogeneity are the hallmarks of effector and memory T cells. Upon antigen stimulation, y T cells differentiate into two major types of memory T cells: central memory cells, which patrol t...Phenotypic and functional heterogeneity are the hallmarks of effector and memory T cells. Upon antigen stimulation, y T cells differentiate into two major types of memory T cells: central memory cells, which patrol the blood and secondary lymphoid organs, and effector memory cells, which migrate to peripheral tissues, y T cells display in vitroa certain degree of plasticity in their function that is reminiscent of that which is observed in conventional CD4 T cells. Similar to CD4 T cells, in which a plethora of specialized subsets affect the host response, y8 T cells may readily and rapidly assume distinct Thl-, Th2-, Th17-, TFH and T regulatory-like effector functions, suggesting that they profoundly influence cell-mediated and humoral immune responses. In addition to differences in cytokine repertoire, y~ T cells exhibit diversity in homing, such as migration to lymph node follicles, to help B cells versus migration to inflamed tissues. Here, we review our current understanding of y T-cell lineage heterogeneity and flexibility, with an emphasis on the human system, and propose a classification of effector y T cells based on distinct functional phenotypes.展开更多
Lipid Droplets(LDs)are emerging as crucial players in colon cancer development and maintenance.Their expression has been associated with high tumorigenicity in Cancer Stem Cells(CSCs),so that they have been proposed a...Lipid Droplets(LDs)are emerging as crucial players in colon cancer development and maintenance.Their expression has been associated with high tumorigenicity in Cancer Stem Cells(CSCs),so that they have been proposed as a new functional marker in Colorectal Cancer Stem Cells(CR-CSCs).They are also indirectly involved in the modulation of the tumor microenvironment through the production of pro-inflammatory molecules.There is growing evidence that a possible connection between metabolic alterations and malignant transformation exists,although the effects of nutrients,primarily glucose,on the CSC behavior are still mostly unexplored.Glucose is an essential fuel for cancer cells,and the connections with LDs in the healthy and CSC populations merit to be more deeply investigated.Here,we showed that a high glucose concentration activated the PI3K/AKT pathway and increased the expression of CD133 and CD44v6 CSC markers.Additionally,glucose was responsible for the increased amount of Reactive Oxygen Species(ROS)and LDs in both healthy and CR-CSC samples.We also investigated the gene modulations following the HG treatment and found out that the healthy cell gene profile was the most affected.Lastly,Atorvastatin,a lipidlowering drug,induced the highest mortality on CR-CSCs without affecting the healthy counterpart.展开更多
文摘Phenotypic and functional heterogeneity are the hallmarks of effector and memory T cells. Upon antigen stimulation, y T cells differentiate into two major types of memory T cells: central memory cells, which patrol the blood and secondary lymphoid organs, and effector memory cells, which migrate to peripheral tissues, y T cells display in vitroa certain degree of plasticity in their function that is reminiscent of that which is observed in conventional CD4 T cells. Similar to CD4 T cells, in which a plethora of specialized subsets affect the host response, y8 T cells may readily and rapidly assume distinct Thl-, Th2-, Th17-, TFH and T regulatory-like effector functions, suggesting that they profoundly influence cell-mediated and humoral immune responses. In addition to differences in cytokine repertoire, y~ T cells exhibit diversity in homing, such as migration to lymph node follicles, to help B cells versus migration to inflamed tissues. Here, we review our current understanding of y T-cell lineage heterogeneity and flexibility, with an emphasis on the human system, and propose a classification of effector y T cells based on distinct functional phenotypes.
基金This study was supported by Italian Association for Cancer Research(AIRC)and from the European Union’s Horizon 2020 Research And Innovation Programme under the Marie Skłodowska-Curie grant agreement No 800924This work was also supported by AIRC(5x1000 Clinical Oncology Extension Program 9979 and IG 16746).The authors acknowledge financial support from King Abdullah University of Science and Technology for OCRF-2014-CRG and OCRF-2016-CRG grants and from Piedmont Region through European Funds for Regional Development(“Food Digital Monitoring”project)This work is dedicated to the memory of our beloved Prof.Giovanni Morrone。
文摘Lipid Droplets(LDs)are emerging as crucial players in colon cancer development and maintenance.Their expression has been associated with high tumorigenicity in Cancer Stem Cells(CSCs),so that they have been proposed as a new functional marker in Colorectal Cancer Stem Cells(CR-CSCs).They are also indirectly involved in the modulation of the tumor microenvironment through the production of pro-inflammatory molecules.There is growing evidence that a possible connection between metabolic alterations and malignant transformation exists,although the effects of nutrients,primarily glucose,on the CSC behavior are still mostly unexplored.Glucose is an essential fuel for cancer cells,and the connections with LDs in the healthy and CSC populations merit to be more deeply investigated.Here,we showed that a high glucose concentration activated the PI3K/AKT pathway and increased the expression of CD133 and CD44v6 CSC markers.Additionally,glucose was responsible for the increased amount of Reactive Oxygen Species(ROS)and LDs in both healthy and CR-CSC samples.We also investigated the gene modulations following the HG treatment and found out that the healthy cell gene profile was the most affected.Lastly,Atorvastatin,a lipidlowering drug,induced the highest mortality on CR-CSCs without affecting the healthy counterpart.