Related Experiment Video
Updated: Aug 10, 2026
08:08
Isolation and Activation of Murine Lymphocytes
Published on: October 30, 2016
Molecular aspects of B-lymphocyte activation
1Department of Microbiology and Immunology, University of California, San Francisco 94143-0552.
Annual Review of Cell Biology
|January 1, 1987
Summary
B-cell activation involves complex pathways regulated by antigen type and cellular signals. Different routes, including T-cell dependent and direct activation by bacterial components like LPS, generate diverse antibody responses against pathogens.
Area of Science:
- Immunology
- Cell Biology
Background:
- B-lymphocyte activation is a complex, regulated process.
- Activation progresses from resting to proliferating and antibody-secreting stages.
Purpose of the Study:
- To elucidate the diverse pathways of B-cell activation.
- To understand how antigen properties and regulatory cells influence B-cell responses.
Main Methods:
- Analysis of B-cell activation routes.
- Investigation of antigen-specific and polyclonal activation mechanisms.
- Role of regulatory cells (macrophages, T helper cells) in B-cell signaling.
Main Results:
- B-cell activation pathways vary based on antigen type and regulatory cell involvement.
- Antigens can directly activate B cells (e.g., bacterial LPS) or require T helper cell signals.
- Different pathways generate distinct antibody responses, crucial for combating various pathogens.
Conclusions:
- Multiple B-cell activation pathways are essential for effective antibody production against diverse microorganisms.
- Understanding these pathways aids in developing strategies against infectious diseases.
Related Concept Videos
01:20Special Features of Adaptive Immunity
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.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
01:23Cells of the Adaptive Immune Response
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...
01:26Antigens Involved in Adaptive Immunity
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
01:28Diversity of Antigen Receptors
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.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
01:22T Cell Activation and Clonal Selection
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
01:24B Cell Activation and Differentiation
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...
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...