Cd4 Cd8 Ratio
Cd4 Cd8 Ratio - Related Videos
10:57
Cell Cycle Analysis: Assessing CD4 and CD8 T Cell Proliferation After Stimulation Using CFSE Staining and Flow Cytometry
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2023
Source: Perchet Thibaut1,2,3, Meunier Sylvain1,2,3, Sophie Novault4, Rachel Golub1,2,3 1 Unit for Lymphpoiesis, 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 cell cycle is a universal process of life. During the cell cycle, a cell undergoes...
06:08
Generating Single Positive CD8 T Cells from Induced Pluripotent Stem Cells
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2025
This video demonstrates an assay to generate tumor antigen-specific induced pluripotent stem cell (iPSC)-derived CD8αβ+ T Cells. Tumor antigen-specific iPSCs are grown on a stromal cell monolayer and differentiated into hematopoietic progenitor cells (HPCs). The HPCs are differentiated into CD4+ CD8+ double-positive T cells using a differentiation medium. These cells are then stimulated to generate single-positive T cells expressing CD8.
06:39
Selective Isolation of CD4+ Vδ1+ γδ T Cells from Human Peripheral Blood Mononuclear Cells
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2025
This video demonstrates a protocol for the magnetic labeling-based isolation of a low-concentration population of CD4+Vδ1+γδ T cells from human peripheral blood mononuclear cells (PBMCs). Using a combination of FITC-conjugated anti-Vδ1 antibodies, magnetic anti-FITC microbeads, and anti-CD4 antibody-coated superparamagnetic beads, the CD4+Vδ1+ T-cells can be successfully purified from the PBMC population.
05:41
Nanoparticle-Based Enrichment and Expansion of Antigen-Specific CD8+ T Cells
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2025
This video describes a protocol for isolating rare-antigen-specific CD8+ T cells using magnetic nanoparticle-based artificial antigen-presenting cells (aAPCs) functionalized with antigenic peptide-loaded MHC-Igs and anti-CD28 antibodies. Interaction of the aAPCs with CD8+ T cells specifically expressing the antigenic peptide-targeting T cell receptors, followed by their expansion in vitro, results in the enrichment and expansion of this CD8+ T cell population.
08:20
In Vitro Differentiation of Human CD4+FOXP3+ Induced Regulatory T Cells (iTregs) from Naïve CD4+ T Cells Using a TGF-β-containing Protocol
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Cited by 24 •
2016
This protocol describes the reproducible generation and phenotyping of human induced regulatory T cells (iTregs) from naïve CD4+ T cells in vitro. Different protocols for FOXP3 induction allow for the study of specific iTreg phenotypes obtained with respective protocols.
FAQs
Interpretation depends on the relative pattern of the two T-cell subsets, not on the ratio in isolation. CD4-positive helper cells and CD8-positive cytotoxic cells represent different functional parts of cellular immunity, so their balance can provide context about immune regulation. Clinicians therefore consider the ratio alongside clinical findings and other laboratory measurements when assessing immune status.
Changes in the CD4/CD8 ratio can signal that the relationship between helper and cytotoxic T-cell populations has shifted. Such a shift may accompany altered immune function, including persistent immune activation or suppression. The measurement does not identify the cause by itself; instead, it offers a cellular perspective that must be integrated with the broader medical assessment.
An absolute CD4 or CD8 result and the ratio answer related but different questions. A single count describes one T-cell subset, whereas the ratio places the two measured populations in relation to each other. Using both perspectives can help clinicians avoid relying on a relative measure alone and supports interpretation with additional laboratory tests.
To obtain the measurement, a laboratory identifies cells carrying CD4 and CD8 surface markers, commonly with flow cytometry. The resulting counts for the two subsets are then used in the division that produces the ratio. This workflow links a cellular identification step to a numerical comparison, making consistent marker detection and count interpretation important.
In HIV care, the ratio can contribute to evaluation of immune disturbance associated with infection. It is not a substitute for clinical findings or other laboratory tests, but it can add information about the balance of relevant T-cell subsets. Its value is greatest when interpreted as one component of the overall assessment rather than as an isolated result.
During treatment, CD4/CD8 measurements can help evaluate immune reconstitution, meaning changes in immune status as treatment proceeds. The ratio supplies a way to follow the relationship between the two T-cell populations over time. Clinicians still need the surrounding clinical and laboratory context to determine how meaningful a change is in an individual patient.