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04
Feb
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.
Biofargo team
