Ctl Expansion Protocol
Ctl Expansion Protocol - Related Videos
07:18
HLA-Ig Based Artificial Antigen Presenting Cells for Efficient ex vivo Expansion of Human CTL
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Cited by 17 •
2011
A new DC independent method for induction and expansion of antigen-specific T cells is described. HLA A2-Ig based artificial Antigen Presenting Cells (aAPC) are loaded with HLA-A2 restricted peptides to efficiently expand CTL of diverse antigen specificity. This technology holds great potential for CTL-based adoptive immunotherapy.
08:06
Experimental Metastasis and CTL Adoptive Transfer Immunotherapy Mouse Model
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Cited by 21 •
2010
An experimental lung metastasis and CTL immunotherapy mouse model for analysis of tumor cells-T cell interaction in vivo.
09:42
Analysis of Thermal Expansion via Dilatometry
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2023
Source: J. Jacob Chavez, Ryan T. Davis, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Thermal expansion is extremely important when considering which materials will be used in systems that experience fluctuations in temperature. A high or low thermal expansion in a material may or may not be desirable, depending on the application. For instance, in a common liquid thermometer, a material with a high thermal expansion would be...
08:53
Expansion Microscopy: High-Resolution Fluorescent Imaging with a Conventional Microscope
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Cited by 1 •
2025
Here, we present a detailed protocol combining cryo-fixation and expansion microscopy methods (Cryo-ExM), allowing for high-resolution imaging with structural preservation adapted to various biological samples. Biological samples are frozen, embedded in a swellable polymer, denatured, expanded, and immunolabeled, enabling super-resolution imaging with standard light microscopes.
01:24
Heat and Free Expansion
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2023
The work done by a thermodynamic system depends not only on the initial and final states but also on the intermediate states—that is, on the path. Like work, when heat is added to a thermodynamic system, it undergoes a change of state, and the state attained depends on the path from the initial state to the final state. Consider an ideal gas cylinder fitted with a piston. When the cylinder is heated at a constant temperature, the gas molecules absorb energy and expand slowly in a controlled...
FAQs
Antigen recognition provides the activation signal that directs T cells toward a specific immune response, while co-stimulatory signals strengthen and support that activation. Together, they promote CTL proliferation rather than relying on antigen recognition alone. This coordinated signaling is important because it links expansion of the cell population with the ability to respond to relevant infected or abnormal target cells.
Growth-promoting cytokines support the continued proliferation of activated CTLs during culture. Their role is to help sustain the expanding population after antigen-specific stimulation and co-stimulation have initiated the response. In practice, cytokine support makes it possible to generate enough cells for downstream evaluation of phenotype, viability, and target-cell killing.
Increasing cell number demonstrates expansion, but it does not by itself establish that the CTLs remain functional. Researchers therefore assess phenotype and viability alongside target-cell killing. These measurements provide complementary information: phenotype describes the expanded population, viability indicates cell condition, and killing assays show whether the cells can perform their intended effector function.
Controlled culture conditions provide a consistent environment in which stimulated CTLs can proliferate and remain suitable for analysis. Maintaining those conditions is important because the protocol depends on coordinated stimulation and cytokine-supported growth. Consistency also improves interpretation of downstream results, allowing changes in cell number, phenotype, viability, or killing to be related to the experimental protocol.
The workflow begins by stimulating T cells through antigen recognition and co-stimulatory signals. The culture is then maintained with growth-promoting cytokines under controlled conditions to support proliferation. After expansion, researchers evaluate the cells for phenotype, viability, and target-cell killing. This sequence connects the culture step with measurable cellular characteristics and immune activity.
The approach is useful when investigators need an expanded CTL population to examine cellular immunity against infection or abnormal cells. In antiviral studies, it supports modeling responses to infected targets; in antitumor work, it supports analysis of responses to abnormal target cells. The resulting cells can also contribute to research on adoptive immunotherapies.
A CTL expansion protocol provides a bridge between the initiating activation signals and later functional assessment. Antigen recognition and co-stimulation initiate the response, cytokines support population growth, and subsequent testing measures phenotype, viability, and target-cell killing. In immunology and infection research, this sequence helps relate cellular activation to observable antiviral or antitumor effector function.