GO:0002924 negative regulation of humoral immune response mediated by circulating immunoglobulin: Immune Regulation, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0002924 describes any process that stops, prevents, or reduces the frequency, rate, or extent of a humoral immune response mediated by circulating immunoglobulin.
• This regulatory process is essential for preventing excessive antibody production and maintaining immune homeostasis.
• Dysregulation of this process is linked to autoimmune diseases, chronic infections, and cancer progression.
• Key genes involved include those encoding immunoregulatory cytokines, inhibitory receptors, and signaling molecules in B cells and plasma cells.
• CRISPR-based knockout, knock-in, and overexpression models enable precise dissection of this regulatory pathway.
• Understanding this process informs therapeutic strategies for autoimmunity, transplantation, and immunotherapy.
Description
The humoral immune response mediated by circulating immunoglobulins is a cornerstone of adaptive immunity, providing protection against pathogens through antibody production. However, uncontrolled antibody responses can lead to autoimmunity and tissue damage. GO:0002924, negative regulation of humoral immune response mediated by circulating immunoglobulin, encompasses the biological processes that restrain this response. This term is critical for researchers studying immune tolerance, vaccine efficacy, and autoimmune pathogenesis. The regulation of humoral immunity involves complex interactions between B cells, T cells, and soluble factors, as highlighted by studies on T cell-dependent humoral responses. Impaired regulation can result in diseases such as juvenile-onset recurrent respiratory papillomatosis, where humoral immune responses are compromised. Understanding the molecular players and pathways that negatively regulate circulating immunoglobulin production is essential for developing targeted therapies.
negative regulation of humoral immune response mediated by circulating immunoglobulin At A Glance
| GO ID | GO:0002924 |
|---|---|
| GO term | negative regulation of humoral immune response mediated by circulating immunoglobulin |
| Ontology | biological_process |
| Synonym | down regulation of humoral immune response mediated by circulating immunoglobulin |
| Major function | Suppression of antibody production mediated by circulating immunoglobulins |
| Related processes | B cell activation, plasma cell differentiation, antibody class switching |
| Cellular location | Extracellular space, B cell surface, lymphoid organs |
| Disease relevance | Autoimmunity, immunodeficiency, cancer, transplantation rejection |
What Is GO:0002924?
GO:0002924 is defined as any process that stops, prevents, or reduces the frequency, rate, or extent of a humoral immune response mediated by circulating immunoglobulin. This biological process acts as a brake on antibody production, ensuring that immune responses are appropriately controlled and do not cause harm to the host. It includes mechanisms such as inhibitory signaling in B cells, regulatory T cell activity, and cytokine-mediated suppression.
Why Is negative regulation of humoral immune response mediated by circulating immunoglobulin Important in Cell Biology?
Regulation of humoral immunity is vital for preventing autoimmunity while maintaining protective immunity. The negative regulation of circulating immunoglobulin responses ensures that antibody production is not excessive, which could lead to immune complex diseases or tissue damage. This process is also relevant in transplantation, where antibody-mediated rejection is a major barrier to graft survival. Furthermore, understanding how this regulation is subverted in cancer can reveal mechanisms of immune evasion. Thus, GO:0002924 is central to immunology research and therapeutic development.
• Prevents autoimmune diseases by restraining autoreactive antibody production.
• Limits immunopathology during chronic infections.
• Influences vaccine efficacy by modulating antibody titers.
• Plays a role in transplantation tolerance and rejection.
• Contributes to cancer immune evasion mechanisms.
• Regulates B cell homeostasis and plasma cell survival.
• Impacts allergy and hypersensitivity reactions.
• Guides development of immunosuppressive therapies.
• Provides insights into immune checkpoint regulation.
• Helps understand age-related immune dysfunction.
What Happens During negative regulation of humoral immune response mediated by circulating immunoglobulin?
Initiation of Regulatory Signals
In simple terms: The immune system sends signals to stop making antibodies.
Negative regulation begins when inhibitory receptors on B cells, such as FcγRIIB, are engaged by immune complexes, leading to phosphorylation of immunoreceptor tyrosine-based inhibitory motifs (ITIMs) and recruitment of phosphatases like SHIP-1. This signaling cascade dampens B cell receptor activation. Additionally, regulatory T cells can suppress B cell responses through contact-dependent mechanisms and secretion of inhibitory cytokines such as IL-10 and TGF-β. Studies on T cell-dependent humoral responses highlight the importance of T cell help in shaping antibody production.
Suppression of B Cell Activation and Differentiation
In simple terms: B cells are prevented from turning into antibody-producing cells.
Once inhibitory signals are initiated, they interfere with key transcription factors like NF-κB and NFAT, reducing the expression of genes required for B cell proliferation and plasma cell differentiation. This leads to decreased production of circulating immunoglobulins. The balance between activating and inhibitory signals determines the outcome of the humoral response. In conditions like juvenile-onset recurrent respiratory papillomatosis, impaired T cell-dependent humoral responses are associated with disease progression.
Antibody Feedback Regulation
In simple terms: Antibodies themselves can turn off their own production.
Circulating immunoglobulins can feedback to inhibit further antibody production through Fc receptors. IgG immune complexes crosslink FcγRIIB on B cells, delivering a negative signal that raises the threshold for activation. This feedback loop is crucial for terminating immune responses after pathogen clearance. The specificity of T cell responses to protein biopharmaceuticals can also be influenced by such regulatory mechanisms.
Role of Cytokines and Soluble Factors
In simple terms: Chemical messengers can suppress antibody production.
Cytokines such as IL-10, TGF-β, and IL-35 are potent suppressors of humoral immunity. They act on B cells and helper T cells to inhibit activation and promote regulatory phenotypes. For example, IL-10 produced by regulatory B cells can suppress pro-inflammatory cytokine production and antibody secretion. Computational network analyses have identified conserved miRNA-gene interactions that may regulate immune responses, including humoral immunity.
Long-Term Maintenance of Tolerance
In simple terms: The immune system remembers to stay quiet against self-antigens.
Negative regulation also involves the maintenance of anergy in autoreactive B cells and the generation of regulatory B cells that continuously suppress antibody production. This process is essential for preventing autoimmunity. Environmental factors, such as rearing environment, can influence immune defence and potentially the balance of regulation. Long-term studies on immunological parameters after vasectomy indicate that immune regulation can persist over time.
Key Genes Involved in GO:0002924 negative regulation of humoral immune response mediated by circulating immunoglobulin
The following genes and proteins are key players in the negative regulation of humoral immune response mediated by circulating immunoglobulin.
| Gene | Major Role | Research Relevance |
|---|---|---|
| FcγRIIB | Inhibitory receptor on B cells | Target for enhancing antibody responses in vaccines |
| SHIP-1 | Phosphatase recruited by ITIMs | Modulates B cell signaling thresholds |
| IL-10 | Anti-inflammatory cytokine | Suppresses B cell activation and antibody production |
| TGF-β | Immunosuppressive cytokine | Inhibits B cell proliferation and differentiation |
| CTLA-4 | Inhibitory receptor on T cells | Regulates T cell help to B cells |
| PD-1 | Inhibitory receptor on T cells | Limits T cell-dependent humoral responses |
| FoxP3 | Transcription factor in Tregs | Essential for regulatory T cell function |
| Blimp-1 | Transcription factor | Promotes plasma cell differentiation; its suppression enhances regulation |
| IRF4 | Transcription factor | Balances plasma cell vs. germinal center B cell fate |
| IL-35 | Regulatory cytokine | Suppresses humoral immunity |
| CD22 | Inhibitory receptor on B cells | Modulates BCR signaling |
| SHP-1 | Phosphatase | Negatively regulates B cell activation |
| Cbl | E3 ubiquitin ligase | Downregulates BCR signaling |
| GITR | Costimulatory receptor | Can modulate Treg function |
| LAG-3 | Inhibitory receptor | Regulates T cell responses |
| TIM-3 | Inhibitory receptor | Suppresses T cell help |
| BTLA | Inhibitory receptor | Inhibits B cell activation |
How Is negative regulation of humoral immune response mediated by circulating immunoglobulin Regulated?
The negative regulation of humoral immune response is itself tightly controlled by various factors. Inhibitory receptors such as FcγRIIB and CTLA-4 are upregulated upon activation to provide negative feedback. Cytokines like IL-10 and TGF-β are produced by regulatory cells and can further suppress antibody production. Transcription factors such as FoxP3 and Blimp-1 orchestrate the development and function of regulatory cells. Additionally, microRNAs and epigenetic modifications can influence the expression of key regulatory genes. The balance between positive and negative signals determines the magnitude and duration of the humoral response.
negative regulation of humoral immune response mediated by circulating immunoglobulin and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| FcγRIIB | Systemic lupus erythematosus | Knockout mouse, point mutation |
| IL-10 | Inflammatory bowel disease | Overexpression, knockout |
| CTLA-4 | Autoimmune lymphoproliferative syndrome | Knock-in, knockout |
| SEZ6L2 | Cancer immune evasion | Overexpression, knockout |
| FoxP3 | IPEX syndrome | Knock-in, knockout |
Autoimmune Diseases
Defects in the negative regulation of humoral immunity can lead to autoantibody production and autoimmune diseases such as systemic lupus erythematosus and rheumatoid arthritis. For instance, polymorphisms in FcγRIIB that impair its inhibitory function are associated with lupus susceptibility. Similarly, reduced regulatory T cell function can contribute to autoimmunity. Understanding these mechanisms is crucial for developing therapies that restore tolerance.
Cancer
Tumors can exploit negative regulatory pathways to evade immune attack. Overexpression of SEZ6L2 in cancer has been linked to immune infiltration, suggesting a role in modulating humoral responses. Additionally, regulatory B cells and T cells can suppress anti-tumor immunity, including antibody-dependent cellular cytotoxicity. Targeting these regulatory mechanisms may enhance cancer immunotherapy.
Transplantation
Antibody-mediated rejection is a major cause of graft failure. Endothelial transcripts have uncovered a phenotype of C4d-negative antibody-mediated rejection, highlighting the complexity of humoral responses in transplantation. Negative regulation of circulating immunoglobulin production is critical for preventing rejection, and strategies to promote tolerance are actively investigated.
Infectious Diseases
In chronic infections, excessive antibody responses can cause immunopathology. For example, in juvenile-onset recurrent respiratory papillomatosis, impaired T cell-dependent humoral immune responses are associated with disease progression. Conversely, inadequate regulation can lead to enhanced pathology. Thus, balancing humoral immunity is key to managing infectious diseases.
From negative regulation of humoral immune response mediated by circulating immunoglobulin-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X negatively regulate antibody production? | Knockout mouse or cell line |
| Does a point mutation in gene Y affect its regulatory function? | Point mutation knock-in |
| Can overexpression of gene Z suppress humoral immunity? | Overexpression cell model |
| How does tagging gene W affect its localization and function? | Tagged knock-in |
| What is the role of gene V in B cell development? | Conditional knockout |
| Can CRISPR library screening identify novel regulators? | Genome-wide CRISPR screen |
How to Study the negative regulation of humoral immune response mediated by circulating immunoglobulin Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout screen | Gene function loss | Identify negative regulators of antibody production |
| RNA-seq | Transcriptome changes | Compare gene expression in suppressed vs. activated B cells |
| Flow cytometry | Cell phenotypes and antibody secretion | Quantify plasma cells and regulatory B cells |
| Immunofluorescence | Protein localization | Visualize inhibitory receptor clustering |
| Phosphoproteomics | Signaling events | Map phosphorylation changes upon inhibition |
| ELISPOT | Antibody-secreting cells | Measure frequency of antibody-producing cells |
| Western blot | Protein expression and phosphorylation | Validate signaling pathways |
| CRISPR activation (CRISPRa) | Gene overexpression | Test if gene activation suppresses humoral immunity |
CRISPR Knockout Screening
Genome-wide CRISPR knockout screens can identify genes that negatively regulate humoral immune responses. By using reporter cell lines or primary B cells, researchers can select for cells with enhanced antibody production upon gene knockout. This approach has been used to discover novel regulators of immune pathways.
RNA Sequencing and Transcriptomics
RNA-seq can reveal gene expression changes in B cells and regulatory T cells under conditions that suppress humoral immunity. Comparing transcriptomes of activated versus suppressed B cells can identify key regulatory networks. Computational network analysis has been applied to identify conserved miRNA-gene interactions in immune regulation.
Flow Cytometry and Imaging
Flow cytometry allows quantification of B cell subsets, plasma cells, and antibody-secreting cells. Imaging techniques such as immunofluorescence can visualize the localization of inhibitory receptors and signaling molecules at the immune synapse. These methods are essential for validating functional changes in regulatory pathways.
Proteomics and Phosphoproteomics
Mass spectrometry-based proteomics can identify protein interactions and post-translational modifications that mediate negative regulation. Phosphoproteomics can reveal signaling events downstream of inhibitory receptors like FcγRIIB. Such studies provide a systems-level view of regulatory mechanisms.
How CRISPR Can Be Used to Study GO:0002924 negative regulation of humoral immune response mediated by circulating immunoglobulin
Knockout
CRISPR knockout is used to delete genes suspected of negatively regulating humoral immunity. For example, knocking out FcγRIIB in mice leads to enhanced antibody responses, confirming its inhibitory role. In cell lines, knockout of SHIP-1 results in hyperresponsive B cells. These models help establish causality.
Point Mutation
Point mutations can be introduced to mimic human polymorphisms or to abrogate specific domains. For instance, mutating the ITIM tyrosines in FcγRIIB prevents its inhibitory function. Such models are valuable for studying the impact of subtle genetic variations on immune regulation.
Knock-in
Knock-in models allow the expression of tagged or reporter genes under endogenous promoters. For example, knocking in a fluorescent tag on FoxP3 enables tracking of regulatory T cells. This approach is useful for studying the dynamics of regulatory cell populations in vivo.
Overexpression
Overexpression of negative regulators can suppress humoral immunity. For example, transgenic overexpression of IL-10 in B cells reduces antibody production. These models help test the sufficiency of a gene in mediating negative regulation.
How EDITGENE Supports negative regulation of humoral immune response mediated by circulating immunoglobulin Research
Researchers studying negative regulation of humoral immune response mediated by circulating immunoglobulin-related genes often need to determine whether a candidate gene is causally involved in suppressing antibody production. This requires precise genetic manipulation to avoid confounding effects. EDITGENE provides a comprehensive suite of CRISPR services to accelerate such discoveries.
Contact EDITGENE today to design your custom CRISPR model for negative regulation of humoral immune response mediated by circulating immunoglobulin research.
Frequently Asked Questions About negative regulation of humoral immune response mediated by circulating immunoglobulin
What is GO:0002924?
GO:0002924 is a Gene Ontology term for any process that stops, prevents, or reduces the frequency, rate, or extent of a humoral immune response mediated by circulating immunoglobulin.
What genes are involved in negative regulation of humoral immune response?
Key genes include FcγRIIB, SHIP-1, IL-10, TGF-β, CTLA-4, PD-1, FoxP3, and others that suppress B cell activation and antibody production.
How is negative regulation of humoral immunity studied?
Researchers use CRISPR knockout screens, RNA-seq, flow cytometry, and proteomics to identify and characterize regulatory pathways.
Why is negative regulation of humoral immunity important?
It prevents autoimmunity, limits immunopathology, and maintains immune homeostasis. Dysregulation is linked to autoimmune diseases, cancer, and transplantation rejection.
What diseases are associated with defective negative regulation of humoral immunity?
Autoimmune diseases like lupus, cancer immune evasion, and antibody-mediated rejection in transplantation are associated with defects in this process.
Can CRISPR be used to study negative regulation of humoral immunity?
Yes, CRISPR knockout, knock-in, and overexpression models are powerful tools to dissect gene function in this pathway.
What is the role of FcγRIIB in humoral immunity?
FcγRIIB is an inhibitory receptor on B cells that dampens antibody production upon engagement by immune complexes.
How do regulatory T cells suppress humoral immunity?
Regulatory T cells suppress B cell responses through inhibitory cytokines like IL-10 and TGF-β, and via contact-dependent mechanisms.
What is antibody feedback regulation?
Antibodies can inhibit their own production by crosslinking FcγRIIB on B cells, providing a negative feedback loop.
How can EDITGENE help my research on GO:0002924?
EDITGENE offers custom CRISPR knockout, point mutation, knock-in, overexpression models, library screening, and bioinformatics services to study this pathway.
Conclusion
GO:0002924, negative regulation of humoral immune response mediated by circulating immunoglobulin, is a critical biological process that maintains immune balance. Its dysregulation contributes to autoimmunity, cancer, and transplantation rejection. Advances in CRISPR technology and functional genomics are unraveling the complex networks involved. EDITGENE provides essential tools to accelerate this research, from knockout models to bioinformatics analysis.
References
- 1. Meunier S et al.. 2020. Specificity of the T Cell Response to Protein Biopharmaceuticals.. Front Immunol 11:1550 PMID: 32793213
- 2. Ding L et al.. 2024. Overexpression of SEZ6L2 and Immune Infiltration in Cancer Based on Gene Image Diagnosis.. Skin Res Technol 30(10):e70096 PMID: 39360664
- 3. Wu X et al.. 2016. Impaired T Cell-dependent Humoral Immune Response Associated with Juvenile-onset Recurrent Respiratory Papillomatosis Progression.. Sci Rep 6:36378 PMID: 27821867
- 4. Sis B et al.. 2010. Endothelial transcripts uncover a previously unknown phenotype: C4d-negative antibody-mediated rejection.. Curr Opin Organ Transplant 15(1):42-8 PMID: 20009933
- 5. Arriero E. 2009. Rearing environment effects on immune defence in blue tit Cyanistes caeruleus nestlings.. Oecologia 159(4):697-704 PMID: 19132405
- 6. Morenikeji OB et al.. 2019. Computational Network Analysis Identifies Evolutionarily Conserved miRNA Gene Interactions Potentially Regulating Immune Response in Bovine Trypanosomosis.. Front Microbiol 10:2010 PMID: 31555241
- 7. Unknown. 1983. Long-term effects of vasectomy. Part II: Immunological parameters. An ICMR Task Force study on regulation of male fertility (surgical approaches).. Contraception 28(6):527-41 PMID: 6673905
