B Lymphocytes: Immune Functions and B-Cell Lymphomas
Understanding the pivotal role of B cells in adaptive immunity and hematologic oncology.
B lymphocytes (B cells) are a fundamental component of the adaptive immune system, primarily responsible for humoral immune responses. From pathogen recognition to maintaining immune tolerance, B cells are indispensable in infectious disease control, autoimmunity, and the development of breakthrough therapies for malignancies.
Core Biological Functions
Antibody Production: Differentiation into plasma cells to secrete immunoglobulins (Ig).
Antigen Presentation: Processing antigens via BCR and presenting to T cells via MHC II.
Immunological Memory: Long-term persistence for rapid response upon re-exposure.
Immune Regulation: Secreting inhibitory cytokines to prevent autoimmunity.
Development & Markers
B cells originate from hematopoietic stem cells in the bone marrow, progressing through Pro-B, Pre-B, and Immature stages.
Key Surface Markers:
Essential for clinical diagnostics: CD19, CD20, CD22.
B Cell Lymphomas & Clinical Impact
Malignant transformation of B cells leads to various lymphomas, broadly categorized into Hodgkin and Non-Hodgkin types. Modern medicine focuses on B cell depletion and CAR-T cell therapy as primary weapons against these hematologic cancers.
Subtype
Characteristics
DLBCL
Aggressive; most common (40%); high remission potential with timely treatment.
Follicular Lymphoma
Indolent; slow progression; managed as a chronic condition.
Burkitt Lymphoma
Highly aggressive; rapid tumor doubling; often involves MYC translocation.
Clinical Manifestations
Painless lymphadenopathy (Cervical, Inguinal).
B-Symptoms: Fever, night sweats, weight loss.
Mass effects: Respiratory distress or chest discomfort.
Treatment Strategies
Combination Chemotherapy (e.g., R-CHOP).
Targeted Immunotherapy (Monoclonal Antibodies).
Radiotherapy & Stem Cell Transplantation.
By teamBiofargo
BIOFARGO TEAM
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