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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.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
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Quantifying Human Naïve B Cell Proliferation Kinetics and Differentiation in Controlled In Vitro Cell Culture.

Anthony J Farchione1,2, HoChan Cheon1,2, Philip D Hodgkin1,2

  • 1Immunology Division, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.

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Summary

Cell Trace Violet (CTV) dyes quantify human B cell proliferation and survival in vitro. This study presents a novel culture method for precise, time-based analysis of B cell responses to different stimuli.

Keywords:
Antibody secreting cells (ASCs)B cell differentiationB cell stimulationCell trace violet (CTV)Isotype switchingMemory B cellsNaïve B cellsPrecursor cohortT cell dependent (TD)T cell independent (TI)

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Division tracking dyes like Cell Trace Violet (CTV) are crucial for quantifying human naïve B cell proliferation, division, and survival kinetics in vitro.
  • Human naïve B cells display distinct T cell-independent (TI) and T cell-dependent (TD) responses to various stimuli, influencing isotype switching and differentiation into antibody-secreting cells (ASCs).

Purpose of the Study:

  • To introduce a novel in vitro culture system for CTV-labeled human naïve B cells.
  • To establish a method for precise, time-based data acquisition on B cell proliferation, division-linked isotype switching, and differentiation.

Main Methods:

  • Utilized Cell Trace Violet (CTV) for cell division tracking.
  • Developed a novel in vitro culture setup for human naïve B cells.
  • Collected time-based data on proliferation and differentiation markers.

Main Results:

  • The novel culture setup enables precise quantification of B cell proliferation and division kinetics.
  • Distinct B cell responses to T cell-independent (CpG, anti-Ig) and T cell-dependent (CD40L, IL-21) stimuli were analyzed.
  • Quantitative analysis revealed biologically meaningful measurements of division rounds and cell fate.

Conclusions:

  • The described method provides valuable insights into the intrinsic programming of B cell health.
  • This approach is applicable for clinical investigations assessing B cell responses.
  • Precise time-based data on B cell proliferation, isotype switching, and differentiation can be obtained.