Lymphoid Organ Population
Lymphoid Organ Population - Related Videos
01:15
Secondary Lymphoid Organs
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2024
Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection. The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
01:16
Primary Lymphoid Organs
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2024
Primary lymphoid organs are pivotal in the formation, development, and maturation of lymphocytes, the white blood cells that serve as the backbone of our immune system. This crucial function underscores their fundamental role in maintaining our overall health and immunity. The two primary lymphoid organs of prime importance are the red bone marrow and the thymus. The red bone marrow is a soft, spongy tissue nestled in the interior of long bones such as the humerus and femur. It is the site...
05:28
Assay for the Identification of Interferon-Gamma Secretion in Murine Lymphoid Organs
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2025
This video demonstrates an imaging method to visualize in situ interferon-gamma (IFN-γ) secretion in the mouse spleen. Following bacterial infection and the induction of IFN-γ accumulation inside T cells and natural killer cells, the spleen is harvested from the mouse. Upon obtaining tissue sections, immunostaining is performed to visualize IFN-γ inside the cells.
04:39
In Vitro Generation of Plasmacytoid Dendritic Cells from Common Lymphoid Progenitors
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2025
This video demonstrates an in vitro assay to generate plasmacytoid dendritic cells (pDCs) from common lymphoid progenitor cells (CLPs). Upon co-culturing purified CLPs with γ-irradiated feeder cells in the presence of Fms-like tyrosine kinase-3 ligand (FL), the CLPs differentiate into non-adherent pDCs, the presence of which is confirmed using flow cytometry.
10:23
Single-cell Gene Expression Using Multiplex RT-qPCR to Characterize Heterogeneity of Rare Lymphoid Populations
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Cited by 7 •
2017
This protocol describes how to assess the expression of a large array of genes at the clonal level. Single-cell RT-qPCR produces highly reliable results with a strong sensitivity for hundreds of samples and genes.
FAQs
The population changes as precursor cells develop and mature, migrate between sites, and expand after antigen exposure. This sequence links developmental stages in primary lymphoid organs with immune-cell organization in secondary organs. Tracking these transitions helps explain how cellular composition supports changing immune responses rather than representing a static inventory.
Primary lymphoid organs support the development and maturation of precursor cells, whereas secondary organs organize encounters among lymphocytes, antigen-presenting cells, and foreign molecules. This division connects immune-cell production with coordinated immune recognition. Comparing populations across these sites can therefore reveal whether changes relate to development, cellular organization, or antigen-driven activity.
Antigen-presenting cells help organize encounters with lymphocytes and foreign molecules in secondary lymphoid organs. Their interactions provide a context in which antigen-driven expansion can alter the composition of a local population. Examining these cellular relationships is important because population analysis concerns not only how many immune cells are present, but also how they are organized.
Changes in cellular composition and organization can indicate that the immune system is responding to infection, vaccination, inflammation, aging, or disease. The significance depends on the biological context and the organ examined. Comparing populations across conditions allows researchers to connect observed cellular patterns with immune development, pathogen defense, or immune-system dysfunction.
Researchers can characterize these populations through microscopy, flow cytometry, or molecular profiling. Microscopy addresses cellular organization, while flow cytometry and molecular profiling provide complementary information about population composition. Using these approaches to examine lymphoid organs can reveal changes in immune-cell distribution and organization across experimental or disease-related conditions.
Comparisons are useful when studying immune development, pathogen defense, inflammation, or immune disorders. Researchers may also examine changes after infection or vaccination, or during aging and disease. Such comparisons can show whether a condition is associated with altered cell composition, redistribution among organs, antigen-driven expansion, or disrupted organization within lymphoid tissues.