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Related Concept Videos

B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
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Leaky Scanning02:28

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During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
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Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
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The Isolation, Differentiation, and Quantification of Human Antibody-secreting B Cells from Blood: ELISpot as a Functional Readout of Humoral Immunity
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Translating transitions - how to decipher peripheral human B cell development.

Mats Bemark1,2

  • 1Department of Clinical Immunology and Transfusion Medicine, Sahlgrenska University hospital, SE 413 45 Gothenburg, Sweden.

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|August 6, 2015
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Summary
This summary is machine-generated.

Human B cell differentiation has revealed significant diversity, including transitional, innate-like, and regulatory subtypes. Understanding these B cell populations is crucial for diagnostics and immune therapy effectiveness.

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The Isolation, Differentiation, and Quantification of Human Antibody-secreting B Cells from Blood: ELISpot as a Functional Readout of Humoral Immunity
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Area of Science:

  • Immunology
  • Cell Biology
  • Hematology

Background:

  • Human B cell differentiation understanding has advanced significantly over the past two decades.
  • Initial assays focused on class-switched antibodies; current understanding reveals substantial diversity within B cell populations.
  • Key stages of B cell development, including transitional, IgM-expressing, and class-switched memory B cells, are now recognized.

Purpose of the Study:

  • To review the current understanding of human B cell diversity.
  • To discuss the phenotypes and functions of various human B cell subtypes.
  • To highlight the clinical relevance of B cell subtype analysis.

Main Methods:

  • Review of current scientific literature on human B cell differentiation.
  • Analysis of data regarding B cell phenotypes and functions.
  • Discussion of flow cytometry applications in B cell subtype identification.

Main Results:

  • Identification of diverse human B cell populations, including transitional, innate-like (akin to mouse B1/marginal zone), and regulatory B cells (producing IL-10).
  • Appreciation of the complexity within IgM-expressing and class-switched memory B cell compartments.
  • Recognition of plasma blasts for tracking plasma cell formation during immune responses and the significance of the mucosal IgA system.

Conclusions:

  • Human B cell compartment is highly diverse, encompassing multiple distinct subtypes with unique functions.
  • Flow cytometry enables the identification of these subtypes, with growing clinical applications in diagnosis and monitoring immune therapies.
  • Further research into human B cell diversity is essential for advancing disease understanding and therapeutic strategies.