GO:0044752 response to human chorionic gonadotropin: Hormone Signaling and Immune Tolerance, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0044752 describes any cellular or organismal response to human chorionic gonadotropin (hCG), including changes in gene expression, secretion, movement, and enzyme activity.
• hCG is a pregnancy hormone that modulates immune tolerance by promoting regulatory B cells and Treg cells while restricting proinflammatory Th17 responses.
• The response to hCG involves ovarian cells, endometrial cells, and immune cells, with age-related declines in ovarian responsiveness.
• Key genes implicated in hCG response include LHCGR, IL10, EBI3, IL12A, FOXP3, and SIRT1.
• hCG-based vaccines and contraceptives are being developed, and hCG responses are studied in animal models such as cattle and baboons.
• CRISPR knockout, knock-in, and overexpression models enable causal dissection of genes in the hCG response pathway.
Description
GO:0044752, response to human chorionic gonadotropin, is a biological process defined as any process that results in a change in state or activity of a cell or organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a human chorionic gonadotropin stimulus. Human chorionic gonadotropin (hCG) is a glycoprotein hormone produced primarily by the placenta after implantation, but it also has roles in non-pregnant states and in cancer. Understanding how cells and organisms respond to hCG is critical for reproductive biology, immunology, and cancer research. The response to hCG is not limited to gonadal tissues; it extends to immune cells, endometrial cells, and even the central nervous system. This article synthesizes authoritative QuickGO data and verified PubMed literature to provide a research-grade overview of GO:0044752, its mechanisms, key genes, disease relevance, and experimental models.
response to human chorionic gonadotropin At A Glance
| GO ID | GO:0044752 |
|---|---|
| GO term | response to human chorionic gonadotropin |
| Ontology | biological_process |
| Synonym | response to human chorionic gonadotropin stimulus |
| Major function | Mediates cellular and organismal changes in response to hCG, including immune modulation, hormone secretion, and gene expression |
| Related hormones | Human chorionic gonadotropin (hCG), luteinizing hormone (LH), progesterone |
| Key cell types | Granulosa-lutein cells, endometrial cells, regulatory B cells, Treg cells, Th17 cells |
| Organisms studied | Human, mouse, baboon, cattle |
| Disease relevance | Pregnancy maintenance, endometriosis, contraception, cancer |
What Is GO:0044752?
According to QuickGO, GO:0044752 (response to human chorionic gonadotropin) is any process that results in a change in state or activity of a cell or organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a human chorionic gonadotropin stimulus. The synonym is response to human chorionic gonadotropin stimulus. This term captures the downstream effects of hCG binding to its receptor or interacting with other cellular components, leading to physiological or cellular changes.
Why Is response to human chorionic gonadotropin Important in Cell Biology?
The response to human chorionic gonadotropin is fundamental to successful pregnancy, as it facilitates embryo implantation and placentation by modulating the maternal immune system. Beyond reproduction, hCG responses are implicated in endometriosis, where the endometrial response is blunted, and in cancer, where hCG can promote immune tolerance. Understanding GO:0044752 helps researchers develop contraceptives, fertility treatments, and immunotherapies.
• hCG is essential for maintaining the corpus luteum and progesterone production in early pregnancy.
• hCG promotes immune tolerance by inducing IL-10+ and IL-35+ regulatory B cells.
• hCG enhances regulatory T cells (Tregs) and suppresses proinflammatory Th17 responses.
• The endometrial response to hCG is blunted in endometriosis, linking the pathway to disease.
• hCG-based vaccines are being developed for contraception, requiring robust antibody responses.
• Ovarian responsiveness to hCG declines with age, affecting fertility.
• hCG modulates sirtuin 1 (SIRT1) in granulosa-lutein cells, impacting cellular metabolism.
• Animal models such as cattle and baboons provide insights into hCG responses in vivo.
• hCG responses are relevant to cancer immunology and immunotherapy.
• CRISPR gene editing enables functional dissection of hCG response genes.
What Happens During response to human chorionic gonadotropin?
hCG Recognition and Receptor Binding
In simple terms: hCG binds to its receptor on target cells, like a key fitting a lock.
The response to hCG begins when hCG binds to the luteinizing hormone/choriogonadotropin receptor (LHCGR) on the surface of target cells, such as granulosa-lutein cells and endometrial cells. This binding triggers intracellular signaling cascades that lead to changes in gene expression and cellular activity. In immune cells, hCG may interact with other receptors or mechanisms to modulate immune responses.
Immune Cell Modulation
In simple terms: hCG helps the immune system tolerate the pregnancy by promoting calming immune cells and reducing harmful ones.
hCG promotes the generation of IL-10+ and IL-35+ regulatory B cells, which contribute to peripheral immune tolerance during pregnancy. It also expands regulatory T cells (Tregs) and restricts proinflammatory Th17 responses, facilitating embryo implantation and placentation. These immune changes are part of the response to hCG and are critical for pregnancy maintenance.
Ovarian and Endometrial Responses
In simple terms: hCG tells the ovaries to produce progesterone and prepares the uterus lining for pregnancy.
In the ovary, hCG stimulates granulosa-lutein cells to produce progesterone and other factors, supporting early pregnancy. The endometrial response to hCG involves changes in gene expression that prepare the uterus for implantation, but this response is blunted in endometriosis. Ovarian responsiveness to hCG decreases with age, affecting fertility.
Metabolic and Sirtuin Signaling
In simple terms: hCG can affect how cells manage energy and stress through proteins like SIRT1.
hCG modulates sirtuin 1 (SIRT1) in human granulosa-lutein cells, with divergent roles that may impact cellular metabolism and stress responses. This suggests that the response to hCG extends beyond classical hormone signaling to include metabolic regulation.
Antibody Responses and Vaccine Development
In simple terms: hCG can be targeted by vaccines to prevent pregnancy, and the body's response to hCG is key.
Vaccines against hCG aim to induce antibodies that neutralize hCG, preventing pregnancy. The immune response to hCG is therefore not only a natural process but also a target for contraception. Understanding the response to hCG helps in designing effective vaccines.
Key Genes Involved in GO:0044752 response to human chorionic gonadotropin
The following genes and proteins are central to the response to human chorionic gonadotropin, based on verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| LHCGR | Receptor for hCG and LH | Mediates hCG signaling in gonadal and endometrial cells |
| IL10 | Anti-inflammatory cytokine | Induced by hCG in regulatory B cells |
| EBI3 | Subunit of IL-35 | Part of IL-35+ regulatory B cells in response to hCG |
| IL12A | Subunit of IL-35 | Part of IL-35+ regulatory B cells in response to hCG |
| FOXP3 | Transcription factor for Tregs | Promoted by hCG to expand Tregs |
| RORC | Transcription factor for Th17 | Suppressed by hCG to restrict Th17 responses |
| SIRT1 | NAD-dependent deacetylase | Modulated by hCG in granulosa-lutein cells |
| PGR | Progesterone receptor | Mediates progesterone responses downstream of hCG |
| CGA | hCG alpha subunit | Component of hCG hormone |
| CGB | hCG beta subunit | Component of hCG hormone |
| IL35 | Immunosuppressive cytokine | Induced by hCG in Breg cells |
| TGFB1 | Immunosuppressive cytokine | May be involved in hCG-mediated immune tolerance |
| VEGFA | Angiogenic factor | May be regulated by hCG in endometrium |
| MMP9 | Matrix metalloproteinase | May be involved in implantation |
| LIF | Leukemia inhibitory factor | Implantation factor potentially regulated by hCG |
| HLA-G | Immune tolerance molecule | May be modulated by hCG |
| IDO1 | Immunomodulatory enzyme | May be induced by hCG |
How Is response to human chorionic gonadotropin Regulated?
The response to human chorionic gonadotropin is regulated at multiple levels. Receptor availability (LHCGR) determines cellular sensitivity to hCG. Intracellular signaling pathways, including those involving SIRT1, modulate the response. Immune cell differentiation and cytokine production are regulated by transcription factors such as FOXP3 and RORC. Age-related factors also influence ovarian responsiveness to hCG. Additionally, the presence of hCG antibodies can modulate the response, as seen in vaccine development.
response to human chorionic gonadotropin and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| IL10 | Pregnancy immune tolerance | Knockout mouse |
| EBI3 | Regulatory B cell function | Knockout mouse |
| FOXP3 | Autoimmunity and pregnancy | Knock-in reporter mouse |
| SIRT1 | Ovarian function and metabolism | Overexpression in granulosa cells |
| LHCGR | Fertility and ovarian response | Point mutation knock-in mouse |
Pregnancy and Immune Tolerance
hCG is critical for establishing and maintaining pregnancy by promoting immune tolerance. It induces regulatory B cells and Tregs while suppressing Th17 responses, facilitating embryo implantation and placentation. Disruptions in this response can lead to pregnancy complications.
Endometriosis
In endometriosis, the endometrial response to hCG is blunted, which may contribute to infertility and implantation failure. This highlights the importance of hCG signaling in uterine receptivity.
Cancer
hCG can promote immune tolerance in cancer, potentially aiding tumor immune evasion. Understanding hCG responses may inform cancer immunotherapy strategies.
Contraception
Vaccines targeting hCG aim to induce antibodies that neutralize the hormone, preventing pregnancy. The immune response to hCG is therefore directly relevant to contraceptive development.
From response to human chorionic gonadotropin-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X mediate hCG-induced immune tolerance? | Knockout mouse |
| Does a specific mutation in LHCGR alter hCG response? | Point mutation knock-in |
| Can we track hCG-responsive cells in vivo? | Tagged knock-in reporter |
| Does overexpression of SIRT1 enhance hCG response? | Overexpression in granulosa-lutein cells |
| What is the effect of hCG on endometrial gene expression? | Baboon model of endometriosis |
| Can hCG vaccine induce antibodies? | Recombinant vaccine in animal models |
How to Study the response to human chorionic gonadotropin Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Gene expression changes | Identify hCG-responsive genes |
| Flow cytometry | Immune cell populations | Quantify Tregs, Bregs, Th17 |
| ELISA | Cytokine and hormone levels | Measure IL-10, IL-35, progesterone |
| CRISPR screen | Gene essentiality | Discover regulators of hCG response |
| Western blot | Protein expression and phosphorylation | Assess signaling pathways |
| Immunohistochemistry | Tissue localization | Detect hCG targets in endometrium |
| Reporter assays | Transcriptional activity | Measure promoter activation by hCG |
Transcriptomics and RNA-seq
RNA sequencing can identify global changes in gene expression in response to hCG in target cells, such as granulosa-lutein cells or immune cells. This method reveals pathways and candidate genes involved in the response.
Flow Cytometry and Immunophenotyping
Flow cytometry is used to quantify immune cell populations, such as regulatory B cells, Tregs, and Th17 cells, after hCG stimulation. This helps assess the immune-modulatory effects of hCG.
Proteomics and Cytokine Profiling
Proteomic approaches and cytokine assays measure secreted factors like IL-10, IL-35, and progesterone in response to hCG. These methods quantify the functional output of the hCG response.
CRISPR Screening
Genome-wide CRISPR knockout screens can identify genes required for hCG response, such as those involved in immune tolerance or hormone signaling. This unbiased approach accelerates target discovery.
How CRISPR Can Be Used to Study GO:0044752 response to human chorionic gonadotropin
Knockout
CRISPR knockout of candidate genes such as IL10, EBI3, or FOXP3 can test their requirement for hCG-induced immune tolerance. Knockout models help establish causality in the response to hCG.
Point Mutation
Introducing point mutations in LHCGR or SIRT1 can mimic human variants and assess their impact on hCG signaling. This approach links specific residues to functional outcomes.
Knock-in
Knock-in of reporter genes (e.g., GFP) into hCG-responsive loci allows tracking of cell populations and gene expression in vivo. Tagged knock-in models facilitate isolation of specific cell types.
Overexpression
Overexpression of genes like SIRT1 or IL-10 can enhance or dampen the hCG response, revealing gain-of-function effects. This is useful for studying pathway activation.
How EDITGENE Supports response to human chorionic gonadotropin Research
Researchers studying response to human chorionic gonadotropin-related genes often need to determine whether a candidate gene is causally involved in the pathway or merely correlated with it. EDITGENE provides a comprehensive suite of CRISPR services to enable such functional studies with high precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for response to human chorionic gonadotropin research.
Frequently Asked Questions About response to human chorionic gonadotropin
What is GO:0044752?
GO:0044752 is the Gene Ontology term for response to human chorionic gonadotropin, defined as any process that results in a change in state or activity of a cell or organism as a result of an hCG stimulus.
What genes are involved in response to human chorionic gonadotropin?
Key genes include LHCGR, IL10, EBI3, IL12A, FOXP3, RORC, and SIRT1, among others.
How does hCG modulate the immune system?
hCG promotes regulatory B cells and Tregs while suppressing Th17 responses, facilitating immune tolerance during pregnancy.
What is the role of hCG in pregnancy?
hCG supports the corpus luteum, maintains progesterone production, and promotes immune tolerance for embryo implantation and placentation.
How is the response to hCG studied in the lab?
Researchers use RNA-seq, flow cytometry, ELISA, and CRISPR screens to study hCG responses in various cell models.
What diseases are associated with hCG response?
hCG response is linked to pregnancy complications, endometriosis, cancer immune evasion, and contraception.
Can CRISPR be used to study hCG response genes?
Yes, CRISPR knockout, knock-in, and overexpression models enable functional dissection of genes in the hCG response pathway.
What is the role of SIRT1 in hCG response?
SIRT1 is modulated by hCG in granulosa-lutein cells and may influence cellular metabolism and stress responses.
How does age affect ovarian response to hCG?
Ovarian responsiveness to hCG declines with age, impacting fertility and hormone production.
What animal models are used to study hCG response?
Baboons and cattle are used to study endometrial and ovarian responses to hCG, respectively.
Conclusion
GO:0044752, response to human chorionic gonadotropin, encompasses a complex network of cellular and organismal changes critical for reproduction, immune tolerance, and disease. Understanding this process offers insights into fertility, pregnancy maintenance, and potential therapeutic interventions. CRISPR-based models and advanced omics technologies continue to unravel the molecular players involved, paving the way for novel diagnostics and treatments.
References
- 1. Liu J et al.. 2019. Human chorionic gonadotropin and IL-35 contribute to the maintenance of peripheral immune tolerance during pregnancy through mediating the generation of IL-10(+) or IL-35(+) Breg cells.. Exp Cell Res 383(2):111513 PMID: 31362000
- 2. Meidan R et al.. 2023. Divergent roles of sirtuin 1 in human granulosa-lutein cells: similarities to human chorionic gonadotropin.. Biol Reprod 108(5):720-730 PMID: 36881661
- 3. Piltonen T et al.. 2003. Ovarian age-related responsiveness to human chorionic gonadotropin.. J Clin Endocrinol Metab 88(7):3327-32 PMID: 12843183
- 4. Schumacher A et al.. 2019. Human Chorionic Gonadotropin-Mediated Immune Responses That Facilitate Embryo Implantation and Placentation.. Front Immunol 10:2896 PMID: 31921157
- 5. Bindas EM et al.. 1984. Progesterone responses to human chorionic gonadotropin in dairy cattle supplemented with beta-carotene.. J Dairy Sci 67(12):2978-85 PMID: 6530493
- 6. Tiwari P et al.. 2024. Prevention of nodules and enhancement of antibody response to genetically engineered recombinant vaccine against Human Chorionic Gonadotropin (hCG) for contraception.. Eur J Contracept Reprod Health Care 29(4):182-187 PMID: 38904162
- 7. Sherwin JR et al.. 2010. The endometrial response to chorionic gonadotropin is blunted in a baboon model of endometriosis.. Endocrinology 151(10):4982-93 PMID: 20668030
- 8. Lentz LS et al.. 2022. Human chorionic gonadotropin promotes murine Treg cells and restricts pregnancy-harmful proinflammatory Th17 responses.. Front Immunol 13:989247 PMID: 36203576
