Lymphocyte Populations
Lymphocyte Populations - Related Videos
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.
03:23
An In Vitro Technique to Stimulate Lymphocytes via Pathogenic Bacteria
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2025
This video demonstrates an in vitro technique to stimulate lymphocytes via non-typeable Haemophilus influenzae (NTHi) and to assess the immune response. Incubating isolated peripheral blood mononuclear cells (PBMCs) with NTHi causes the bacterial cells to stimulate T lymphocytes, leading to cytokine production. Upon inhibiting the secretion of cytokines, immunofluorescence staining is performed to detect the accumulated intracellular cytokines in stimulated T lymphocytes.
08:08
Isolation and Activation of Murine Lymphocytes
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Cited by 56 •
2016
Lymphocytes are the major players in adaptive immune responses. Here, we present a lymphocyte purification protocol to determine the physiological functions of the desired molecules in lymphocyte activation in vitro and in vivo. The described experimental procedures are suitable for comparing functional capacities between control and genetically modified lymphocytes.
04:46
Isolation of Lymphocytes from Mouse Genital Tract Mucosa
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Cited by 10 •
2012
An efficient way to isolate lymphocytes from mouse genital tract is described. This method takes advantage of enzyme digestion and Percoll gradient separation to allow efficient isolation. This technique is also adaptable to for use in other...
04:45
An Immunological Technique to Monitor Adjuvant-Mediated Cytotoxic T Lymphocyte Generation
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2025
The video demonstrates an immunological method to monitor in vivo adjuvant-induced cytotoxic T lymphocyte or CTL production. A mouse is pre-injected with genetically engineered, proliferative dye-stained donor CD8+ T lymphocytes. Subcutaneous injection of ovalbumin with adjuvants generates cytotoxic CD8+ T lymphocytes that are identified post-harvesting through immunostaining and flow cytometry.
FAQs
Common lymphoid progenitors differentiate into groups that acquire specialized receptors, surface markers, and effector functions. This process creates functional diversity among B cells, T cells, and natural killer cells rather than producing identical immune cells. The resulting characteristics allow researchers to distinguish populations according to their developmental state and likely contribution to immune defense.
Antigen recognition helps identify lymphocytes that respond to a particular immune challenge, while clonal expansion increases the representation of responsive cells. Examining these processes can reveal whether a population is changing during infection or vaccination. The pattern of expansion, together with receptor and surface-marker information, helps connect population changes with immune activation.
Researchers distinguish these functional states by examining combinations of surface markers, receptors, and observed or inferred effector functions. Naïve and memory cells reflect different stages of immune experience, whereas regulatory, cytotoxic, and antibody-producing cells represent different functional roles. Separating these categories provides more information than measuring total lymphocyte numbers alone.
Flow cytometry enables researchers to characterize lymphocyte populations according to selected surface markers and related cellular features. By comparing the distribution of marker-defined groups, investigators can identify shifts in naïve, memory, regulatory, cytotoxic, or antibody-producing subsets. This makes the method useful for examining immune activation, dysfunction, and changes associated with disease progression.
Cell sorting is useful when investigators need to separate particular lymphocyte populations for focused analysis. Sorting can isolate groups identified through their surface markers or other distinguishing characteristics, allowing population-specific investigation rather than analysis of mixed cells. In immunology and infection studies, this approach supports closer examination of subsets involved in immune responses, dysfunction, or treatment-related changes.
Molecular profiling and population measurements can track how lymphocyte groups change during infection or after vaccination. Researchers may examine shifts in defined subsets alongside receptor, marker, and functional information to assess immune activation or memory formation. Similar analyses support research into immunodeficiency, autoimmunity, disease progression, and immunotherapies by revealing altered immune composition or function.