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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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Cells of the Adaptive Immune Response01:23

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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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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Special Features of Adaptive Immunity01:20

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The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
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Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
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Lymphoid Cells and Tissues01:18

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Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
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Updated: Dec 30, 2025

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B cells and tertiary lymphoid structures promote immunotherapy response.

Beth A Helmink1, Sangeetha M Reddy2, Jianjun Gao3

  • 1Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. bhelmink@mdanderson.org.

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B cells, not just T cells, are crucial for cancer treatment response. Our study shows B cell signatures and tertiary lymphoid structures predict success with immune checkpoint blockade therapy.

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Area of Science:

  • Immunology
  • Oncology
  • Cancer Research

Background:

  • Immune checkpoint blockade (ICB) has transformed cancer therapy, but predictive biomarkers and response-augmentation strategies primarily focus on T cells.
  • The role of other immune cells, such as B cells, in ICB treatment response remains less understood.

Purpose of the Study:

  • To investigate the role of B cells and tertiary lymphoid structures in predicting and potentially enhancing response to immune checkpoint blockade (ICB) therapy.
  • To identify novel biomarkers for ICB treatment efficacy.

Main Methods:

  • Bulk and single-cell RNA sequencing to analyze gene expression in tumor samples from ICB-treated patients.
  • Computational analysis (MCP-counter) to assess immune and stromal cell composition.
  • Histological evaluation and mass cytometry to examine B cell localization and phenotype.

Main Results:

  • B cell-specific gene signatures were the most differentially expressed in tumors of responders versus non-responders across multiple ICB cohorts.
  • B cells were found within tertiary lymphoid structures, and responders showed clonal expansion and unique functional states of B cells.
  • Switched memory B cells were enriched in the tumors of patients responding to ICB therapy.

Conclusions:

  • B cells play a significant role in anti-tumor immunity and response to ICB therapy.
  • Tertiary lymphoid structures are associated with ICB treatment efficacy.
  • B cell-related biomarkers and therapeutic strategies hold promise for improving cancer treatment outcomes.