Cd3-positive T Lymphocytes
Cd3-positive T Lymphocytes - Related Videos
11:35
Magnetic Activated Cell Sorting (MACS): Isolation of Thymic T Lymphocytes
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2023
Source: Meunier Sylvain1,2,3, Perchet Thibaut1,2,3, Sophie Novault4, Rachel Golub1,2,3 1 Unit for Lymphopoiesis, Department of Immunology, Pasteur Institute, Paris, France 2 INSERM U1223, Paris, France 3 Université Paris Diderot, Sorbonne Paris Cité, Cellule Pasteur, Paris, France 4 Flow Cytometry Platfrom, Cytometry and Biomarkers UtechS, Center for Translational Science, Pasteur Institute, Paris, France Defence against pathogens depends on surveillance by the immune system. This system is...
08:43
A Fluorescence-based Lymphocyte Assay Suitable for High-throughput Screening of Small Molecules
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Cited by 10 •
2017
We present in the current study a novel fluorescence-based assay using lymphocytes derived from a transgenic mouse. This assay is suitable for high-throughput screening (HTS) of small molecules endowed with the capacity of either inhibiting or promoting lymphocyte activation.
09:00
Analysis of Lymphocyte Extravasation Using an In Vitro Model of the Human Blood-brain Barrier
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Cited by 6 •
2017
Here, we describe a human blood-brain barrier model enabling to investigate lymphocyte transmigration into the central nervous system in vitro.
17:07
Flow Cytometry and Fluorescence-Activated Cell Sorting (FACS): Isolation of Splenic B Lymphocytes
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2023
Source: Perchet Thibaut1,2,3, Meunier Sylvain1,2,3, Sophie Novault4, Rachel Golub1,2,3 1 Unit for Lymphopoiesis, Department of Immunology, Pasteur Institute, Paris, France 2 INSERM U1223, Paris, France 3 Université Paris Diderot, Sorbonne Paris Cité, Cellule Pasteur, Paris, France 4 Flow Cytometry Platfrom, Cytometry and Biomarkers UtechS, Center for Translational Science, Pasteur Institute, Paris, France The overall function of the immune system is to defend the body against infectious...
12:59
Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes
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Cited by 33 •
2013
With effector functions distinct from other T cell subsets, Th17 cells have been centrally implicated in inflammatory autoimmunity. This in vitro Th17 differentiation protocol provides a means to determine whether naïve CD4+ T lymphocytes can differentiate into Th17 cells, and to further examine their role in autoimmunity and host response.
FAQs
Recognition of an antigen presented by major histocompatibility complex molecules initiates signaling through the CD3 complex. These signals coordinate several downstream outcomes, including T-cell proliferation, differentiation, cytokine production, and target-cell killing. In cancer research, this linkage helps explain why CD3-positive cell counts alone may not fully represent antitumor activity without considering the cells’ functional state.
Cell abundance indicates how many CD3-positive T lymphocytes are present, but it does not by itself establish whether they are functionally active. Their relevance depends on the state of the immune environment and the cells’ capacity to respond through antigen recognition, produce cytokines, proliferate, or kill target cells. This distinction supports separate evaluation of immune quantity and activity.
Major histocompatibility complex molecules present antigenic information for recognition by the T-cell receptor. When this recognition occurs, the associated CD3 complex transmits activation signals rather than serving only as a cellular marker. The interaction therefore connects antigen presentation with coordinated changes in T-cell behavior, including expansion, differentiation, cytokine release, and destruction of target cells.
Assessing CD3-positive cells in tumors provides information about the degree of T-cell presence within the tumor environment. Greater or more meaningful immune infiltration can support characterization of an immune-active setting, whereas limited infiltration or an altered functional state may be consistent with immune suppression. Interpretation is strongest when abundance is considered alongside functional indicators and treatment response.
Researchers measure CD3-positive cells in tumor samples and blood to characterize immune status across different biological compartments. These measurements can reveal whether T-cell infiltration is present in the tumor and provide a corresponding peripheral immune context. The resulting profiles support assessment of immune environments, comparison of treatment responses, and investigation of how antitumor immunity changes.
Their abundance and functional state can help researchers assess whether an immunotherapy response is accompanied by meaningful T-cell involvement. Measurements in tumors and blood may support response characterization, while changes in cytokine production, proliferation, differentiation, or target-cell killing provide functional context. These data can also guide biomarker development and treatment designs intended to strengthen antitumor T-cell activity.