Cellular Immunity
Cellular Immunity - Related Videos
07:11
Multicolor Flow Cytometry Analyses of Cellular Immune Response in Rhesus Macaques
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Cited by 6 •
2010
We demonstrate the utility of multicolor flow cytometry for detailed phenotypic and functional characterization of total as well as memory subsets of CD4+ and CD8+ T cells in rhesus macaques, the ideal model for HIV/AIDS vaccine studies.
01:38
What is the Immune System?
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2019
Overview The immune system comprises diverse biological structures and processes that protect the body from disease. These processes can be classified into innate and adaptive immunity. To work effectively, the immune system needs to detect pathogens by distinguishing the body’s own structures from foreign elements. If this determination fails, autoimmune diseases occur in which the immune system reacts against the body’s own tissue. The Innate Immune System Acts Fast and Non-specifically
05:07
Isolation, Characterization and Functional Examination of the Gingival Immune Cell Network
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Cited by 30 •
2016
We have established a technique for the isolation, phenotypic characterization and functional analysis of immune cells from murine gingiva.
15:39
Studying Organelle Dynamics in B Cells During Immune Synapse Formation
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Cited by 8 •
2019
Herein we describe two approaches to characterize cell polarization events in B lymphocytes during the formation of an IS. The first, involves quantification of organelle recruitment and cytoskeleton rearrangements at the synaptic membrane. The second is a biochemical approach, to characterize changes in composition of the centrosome, which undergoes polarization to the immune synapse.
06:13
Enzyme-linked Immunospot Assay (ELISPOT): Quantification of Th-1 Cellular Immune Responses Against Microbial Antigens
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Cited by 3 •
2010
Identification of microbial targets of adaptive immunity in idiopathic diseases can be accomplished by the use of the enzyme-linked immunospot assay.
FAQs
Antigen-presenting cells initiate the response by displaying peptide fragments on major histocompatibility complex molecules. T-cell receptors inspect these displayed fragments and, when recognition occurs, activate downstream immune activity. This recognition step connects the presence of an infected, abnormal, or foreign cell with clonal expansion, cytokine signaling, or direct target-cell killing.
Recognition can produce several coordinated outcomes rather than a single response. T cells may undergo clonal expansion, increasing the number of cells responding to the antigen, while cytokine signaling helps organize immune activity. In other cases, activated cells directly kill the recognized target. These outcomes allow cellular immunity to respond selectively to specific abnormal or infected cells.
Cellular immunity centers on immune cells recognizing and acting against infected, abnormal, or foreign cells, whereas antibody-mediated protection provides a complementary form of defense. The distinction is important because cellular responses are particularly relevant when immune protection depends on identifying affected cells themselves. Studying both forms together gives a broader view of how immune defense develops.
Researchers can evaluate cellular immunity by measuring T-cell activation, cytokine production, or cytotoxicity. T-cell activation indicates recognition and response, cytokine production reflects signaling by responding immune cells, and cytotoxicity indicates the ability to eliminate target cells. Using these readouts helps characterize how strongly an immune response develops and which functional outcome predominates.
Investigators can examine how antigen presentation leads to T-cell responses and then measure activation, cytokine production, or cytotoxicity. This workflow connects an initiating recognition event with measurable immune outcomes without relying on a single indicator. The resulting data can help compare immune responses across disease studies, vaccine investigations, or other experimental settings.
Cellular immunity helps explain resistance to intracellular pathogens because the response focuses on identifying and eliminating affected cells. It also contributes to immune surveillance of tumors, where abnormal cells become targets of immune recognition. Measuring T-cell activity, cytokine signaling, or cytotoxicity in these contexts can clarify how effectively the immune system detects and responds to such threats.
Vaccine studies can use cellular immunity to examine whether vaccination produces measurable T-cell activation, cytokine production, or cytotoxicity. These outcomes provide information beyond antibody-mediated protection by showing how immune cells respond to presented antigen fragments. Such measurements help researchers characterize the development and functional quality of vaccine-associated immune responses.
Transplant research uses cellular immunity to investigate how T cells recognize foreign cellular material and initiate immune activity. Subsequent clonal expansion, cytokine signaling, or target-cell killing can provide indicators of the response. Measuring these processes helps explain the biological basis of transplant rejection and supports studies of how immune responses develop against transplanted tissue.