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Updated: Aug 9, 2026
Flow Cytometric Analysis of Natural Killer Cell Lytic Activity in Human Whole Blood
Published on: March 17, 2017
Distribution of lymphocyte subsets and natural killer cells in the human body
1Zentrum Anatomie, Medizinische Hochschule Hannover.
Insights
This study summarizes B and T lymphocyte subset frequencies across human tissues. It compares lymphocyte and natural killer (NK) cell distribution for a comprehensive immune system overview.
Area of Science:
- Immunology
- Cell Biology
Background:
- Understanding lymphocyte subset distribution is crucial for interpreting immune system function.
- Previous studies often focus on single tissues, limiting a holistic view.
- Age-related variations in lymphoid organs necessitate focusing on adult data.
Purpose of the Study:
- To compile and summarize data on B and T lymphocyte subset frequencies and absolute numbers in various human tissues and fluids.
- To provide a comprehensive overview of lymphocyte distribution for accurate interpretation of immune system status.
- To compare the distribution of natural killer (NK) cells with lymphocytes.
Main Methods:
- Systematic collection and summarization of published data on lymphocyte subset frequencies.
- Inclusion of data from cell suspensions and tissue sections of lymphoid and nonlymphoid organs.
- Focus on data from adult individuals to account for age-related organ size variations.
Main Results:
- Compiled data on B and T lymphocyte subset frequencies and absolute numbers from diverse human tissues and fluids.
- Established a basis for interpreting immune cell distribution within the context of the entire immune system.
- Highlighted functional and distributional differences between lymphocytes and natural killer (NK) cells.
Conclusions:
- A comprehensive summary of lymphocyte subset distribution across human tissues is essential for accurate immunological interpretation.
- Acknowledging the distinct behavior of NK cells compared to lymphocytes is vital for understanding immune cell dynamics.
- This compilation serves as a valuable resource for researchers studying the human immune system.
Abstract:
The frequency and distribution of B and T lymphocyte subsets have been determined in many body tissues and fluids by preparing cell suspensions and tissue sections from lymphoid and nonlymphoid organs. In humans these studies often concentrate on the blood or on one particular cell source for obvious reasons. However, such data can only be interpreted correctly if the whole immune system is taken into consideration [64]. To facilitate this, reports on the frequencies and the absolute numbers of B and T lymphocyte subsets within various human tissues and fluids have been collected from a wide variety of journals and are briefly summarized here. Since the size of lymphoid organs varies with age (e.g. thymus, tonsils), only the data of adult individuals were included, unless otherwise stated. Natural killer (NK) cells are morphologically quite similar to lymphocytes [59], but very different functionally. For example, they are not able to recirculate from the blood via the lymph nodes and the thoracic duct back to the blood as lymphocytes do [19]. Thus, human NK cells have been compared with lymphocytes with respect to number and distribution.
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