GO:0072110 glomerular mesangial cell proliferation: Regulatory Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0072110 describes the biological process by which glomerular mesangial cells multiply, expanding their population within the glomerulus.
• Mesangial cell proliferation is a central driver of progressive glomerular injury in diabetic nephropathy, IgA nephropathy, and other chronic kidney diseases.
• Key molecular regulators include PDGF-B/PDGFR-beta signaling, HIF-1alpha/mROS feedback loops, complement factor H, glycine decarboxylase, and the circRNA Arf3/miR-107-3p/Tmbim6 axis.
• Both positive and negative regulators exist: YY1/HIF-1alpha and glycine decarboxylase promote proliferation, while circRNA Arf3 and PDGF-B/PDGFR-beta inhibition suppress it.
• CRISPR-based knockout, point mutation, knock-in, and overexpression models enable causal dissection of these regulatory pathways in mesangial cells.
• Targeting mesangial cell proliferation is a promising therapeutic strategy for slowing glomerular disease progression.
Description
Glomerular mesangial cell proliferation (GO:0072110) is the biological process by which mesangial cells, the contractile pericytes of the glomerular tuft, multiply and expand their population. This process is essential for normal glomerular development and repair, but when dysregulated it becomes a hallmark of progressive kidney disease. Understanding the molecular triggers and brakes of mesangial cell proliferation is therefore a major goal in nephrology research. Mesangial cells provide structural support to the glomerular capillary loops, regulate filtration surface area, and produce extracellular matrix. Under homeostatic conditions, mesangial cells are quiescent, with very low turnover. However, in response to injury, hyperglycemia, immune complexes, or growth factors such as PDGF-B, they re-enter the cell cycle and proliferate. This proliferative response, while initially reparative, can become maladaptive and lead to mesangial expansion, matrix accumulation, and glomerulosclerosis. Recent studies have identified diverse molecular regulators of GO:0072110, including hypoxia-inducible factor 1 alpha (HIF-1alpha), mitochondrial reactive oxygen species (mROS), complement factor H, glycine decarboxylase, and circular RNAs. These discoveries have been accelerated by CRISPR gene editing and other functional genomics tools, which allow researchers to test causality of candidate genes in mesangial cell proliferation. This article synthesizes the current understanding of GO:0072110, its regulatory mechanisms, associated diseases, and the experimental models used to study it.
glomerular mesangial cell proliferation At A Glance
| GO ID | GO:0072110 |
|---|---|
| GO term | glomerular mesangial cell proliferation |
| Ontology | biological_process |
| Synonym | none |
| Major function | Multiplication or reproduction of glomerular mesangial cells, leading to expansion of the mesangial cell population |
| Cellular context | Glomerular mesangium, the central stalk of the glomerular tuft |
| Physiological role | Glomerular development, repair, and maintenance of capillary loop structure |
| Pathological role | Drivers of mesangial expansion, glomerulosclerosis, and progressive kidney disease |
| Key regulators | PDGF-B/PDGFR-beta, HIF-1alpha, mROS, complement factor H, glycine decarboxylase, circRNA Arf3/miR-107-3p/Tmbim6 |
What Is GO:0072110?
GO:0072110, glomerular mesangial cell proliferation, is defined by the Gene Ontology as the multiplication or reproduction of glomerular mesangial cells, resulting in the expansion of the population. In simpler terms, it is the process by which mesangial cells divide to increase their numbers within the glomerulus. This process is distinct from mesangial cell hypertrophy (increase in cell size) and from proliferation of other glomerular cell types such as podocytes or endothelial cells.
Why Is glomerular mesangial cell proliferation Important in Cell Biology?
GO:0072110 is critically important because mesangial cell proliferation is a common final pathway in many progressive glomerular diseases, including diabetic nephropathy, IgA nephropathy, lupus nephritis, and mesangioproliferative glomerulonephritis. Excessive mesangial cell proliferation leads to mesangial expansion, which compresses glomerular capillaries, reduces filtration surface area, and ultimately causes glomerulosclerosis and loss of kidney function. Therefore, understanding the molecular mechanisms that control mesangial cell proliferation is essential for developing targeted therapies to halt or reverse kidney disease progression.
• Mesangial cell proliferation is a hallmark of diabetic nephropathy and contributes to disease progression.
• In IgA nephropathy, glycine decarboxylase boosts mesangial cell proliferation through the pyrimidine pathway, linking metabolism to proliferation.
• PDGF-B and PDGFR-beta are potent mitogens for mesangial cells, and their inhibition reduces proliferation in experimental models.
• Complement factor H derived from mesangial cells regulates complement activation and influences mesangial cell proliferation.
• The YY1/HIF-1alpha/mROS positive-feedback loop exacerbates mesangial cell proliferation in early diabetic kidney disease.
• CircRNA Arf3 suppresses mesangial cell proliferation and fibrosis via the miR-107-3p/Tmbim6 axis, representing a negative regulator.
• Mesangial cell proliferation is a therapeutic target; siRNA against PDGF-B or PDGFR-beta reduces proliferation in vitro.
• CRISPR screens can identify novel regulators of mesangial cell proliferation, accelerating target discovery.
• Understanding GO:0072110 helps explain why some kidney diseases progress despite control of primary insults.
• Mesangial cell proliferation assays are standard in nephrology research for testing drug candidates.
What Happens During glomerular mesangial cell proliferation?
Initiation by Growth Factors and Injury
In simple terms: Mesangial cells start dividing when they receive growth signals or sense injury.
In the quiescent state, mesangial cells are arrested in G0/G1 of the cell cycle. Upon glomerular injury or exposure to growth factors such as PDGF-B, these cells re-enter the cell cycle. PDGF-B is a potent mitogen for mesangial cells, and its receptor PDGFR-beta is upregulated in proliferative glomerular diseases. Other triggers include hyperglycemia, immune complexes, complement activation, and mechanical stress. The initiation phase involves activation of receptor tyrosine kinases and downstream signaling cascades, including MAPK and PI3K/Akt pathways.
Cell Cycle Progression and DNA Synthesis
In simple terms: Once activated, mesangial cells go through the steps of cell division, copying their DNA and splitting into two cells.
After growth factor stimulation, mesangial cells progress through the G1 phase, during which they integrate mitogenic signals and prepare for DNA synthesis. Key regulators include cyclins, cyclin-dependent kinases (CDKs), and CDK inhibitors. The transition to S phase is marked by DNA replication, followed by G2 and mitosis. In mesangial cells, this process is tightly regulated by positive and negative feedback loops. For example, the YY1/HIF-1alpha/mROS positive-feedback loop promotes proliferation by sustaining mitochondrial reactive oxygen species and HIF-1alpha activity. Conversely, circRNA Arf3 acts as a negative regulator by sponging miR-107-3p, leading to upregulation of Tmbim6 and suppression of proliferation.
Metabolic Reprogramming Supporting Proliferation
In simple terms: Dividing mesangial cells need extra building blocks, so they change their metabolism to support rapid growth.
Proliferating mesangial cells undergo metabolic reprogramming to meet the demands of biomass production. Glycine decarboxylase (GLDC), an enzyme in the glycine cleavage system, advances IgA nephropathy by boosting mesangial cell proliferation through the pyrimidine pathway. This suggests that nucleotide synthesis is a critical metabolic node for mesangial cell proliferation. Additionally, mitochondrial reactive oxygen species (mROS) generated by the electron transport chain can act as signaling molecules to promote proliferation, as part of the YY1/HIF-1alpha/mROS feedback loop.
Regulation by Complement and Immune Mediators
In simple terms: The immune system can either help or hinder mesangial cell division, depending on the context.
Mesangial cells themselves produce complement factor H, which regulates complement activation and influences their own proliferation. Complement factor H derived from mesangial cells maintains actin cytoskeleton and modulates cell proliferation, suggesting an autocrine regulatory loop. In immune-complex-mediated diseases such as IgA nephropathy, complement activation products can stimulate mesangial cells to proliferate. This interplay between the complement system and mesangial cell proliferation highlights the importance of immune regulation in GO:0072110.
Resolution or Progression to Fibrosis
In simple terms: After proliferation, mesangial cells may either return to rest or continue to cause scarring.
In self-limited injury, mesangial cell proliferation resolves, and cells undergo apoptosis or return to quiescence. However, in chronic diseases, sustained proliferation leads to mesangial expansion and excessive extracellular matrix deposition, resulting in glomerulosclerosis. The balance between proliferation and apoptosis is critical; dysregulation can tip the scale toward progressive fibrosis. Factors such as persistent growth factor signaling, ongoing complement activation, and metabolic alterations can sustain proliferation and drive fibrosis.
Key Genes Involved in GO:0072110 glomerular mesangial cell proliferation
The following genes and proteins have been experimentally implicated in the regulation of glomerular mesangial cell proliferation (GO:0072110) based on the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PDGF-B | Potent mitogen for mesangial cells; activates PDGFR-beta | Target for siRNA-mediated inhibition of proliferation |
| PDGFR-beta | Receptor tyrosine kinase mediating PDGF-B signaling | Inhibition reduces mesangial cell proliferation |
| YY1 | Transcription factor that promotes proliferation via HIF-1alpha/mROS loop | Knockdown reduces mesangial cell proliferation in diabetic kidney disease |
| HIF-1alpha | Hypoxia-inducible factor; part of positive-feedback loop with YY1 and mROS | Target for modulating proliferation in early diabetic kidney disease |
| CFH | Complement factor H; regulates complement activation and influences proliferation | Mesangial cell-derived CFH modulates actin cytoskeleton and proliferation |
| GLDC | Glycine decarboxylase; boosts proliferation via pyrimidine pathway | Linked to IgA nephropathy progression |
| CircRNA Arf3 | Circular RNA that suppresses proliferation and fibrosis | Sponges miR-107-3p to upregulate Tmbim6 |
| miR-107-3p | MicroRNA targeted by circRNA Arf3; promotes proliferation when free | Axis component in diabetic nephropathy |
| Tmbim6 | Transmembrane BAX inhibitor motif containing 6; effector of circRNA Arf3 axis | Mediates suppression of proliferation and fibrosis |
| mROS | Mitochondrial reactive oxygen species; signaling molecules in feedback loop | Modulates proliferation in diabetic kidney disease |
| Cyclins/CDKs | Cell cycle regulators driving G1/S transition | General proliferation machinery in mesangial cells |
| MAPK | Signaling pathway downstream of growth factors | Mediates mitogenic signals in mesangial cells |
| PI3K/Akt | Survival and proliferation pathway | Contributes to mesangial cell proliferation |
| TGF-beta | Cytokine that can inhibit or promote proliferation depending on context | Implicated in mesangial matrix accumulation |
| Angiotensin II | Vasoactive peptide that can stimulate mesangial cell proliferation | Relevant to hemodynamic regulation of proliferation |
How Is glomerular mesangial cell proliferation Regulated?
The process of glomerular mesangial cell proliferation (GO:0072110) is regulated by a complex network of growth factors, signaling pathways, and feedback loops. Positive regulators include PDGF-B/PDGFR-beta, which activates MAPK and PI3K/Akt pathways to drive cell cycle progression. The YY1/HIF-1alpha/mROS positive-feedback loop sustains proliferation under diabetic conditions by promoting mitochondrial reactive oxygen species and HIF-1alpha activity. Glycine decarboxylase supports proliferation by enhancing pyrimidine synthesis. Negative regulators include circRNA Arf3, which sponges miR-107-3p to upregulate Tmbim6 and suppress proliferation. Complement factor H produced by mesangial cells can modulate proliferation and actin cytoskeleton dynamics. Additionally, cell cycle checkpoints involving cyclins, CDKs, and CDK inhibitors provide intrinsic regulation. The balance between these positive and negative signals determines whether mesangial cell proliferation resolves or progresses to fibrosis.
glomerular mesangial cell proliferation and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| YY1/HIF-1alpha/mROS | Diabetic nephropathy | Knockout or knockdown in mesangial cells under high glucose |
| GLDC | IgA nephropathy | Overexpression or knockout in mesangial cells with IgA stimulation |
| CircRNA Arf3 | Diabetic nephropathy | Overexpression or knockdown in mesangial cells under high glucose |
| PDGF-B/PDGFR-beta | Mesangioproliferative glomerulonephritis | siRNA knockdown in mesangial cells |
| CFH | Complement-mediated glomerulopathies | Knockout or overexpression in mesangial cells |
Diabetic Nephropathy
Diabetic nephropathy is a leading cause of chronic kidney disease, and mesangial cell proliferation is a key early event in its pathogenesis. Hyperglycemia induces the YY1/HIF-1alpha/mROS positive-feedback loop, which exacerbates mesangial cell proliferation in mouse models of early diabetic kidney disease. CircRNA Arf3 suppresses mesangial cell proliferation and fibrosis in diabetic nephropathy via the miR-107-3p/Tmbim6 axis, suggesting that loss of this negative regulator contributes to disease. Targeting these pathways may slow the progression of diabetic nephropathy.
IgA Nephropathy
IgA nephropathy is characterized by mesangial deposition of IgA immune complexes, leading to mesangial cell proliferation and matrix expansion. Glycine decarboxylase (GLDC) advances IgA nephropathy by boosting mesangial cell proliferation through the pyrimidine pathway, linking metabolic reprogramming to disease progression. This finding suggests that inhibiting GLDC or pyrimidine synthesis could be a therapeutic strategy for IgA nephropathy.
Mesangioproliferative Glomerulonephritis
Mesangioproliferative glomerulonephritis encompasses a group of diseases with prominent mesangial cell proliferation, often driven by PDGF-B and PDGFR-beta signaling. Inhibition of PDGF-B or PDGFR-beta using siRNA-containing chitosan nanoplexes reduces mesangial cell proliferation in vitro, demonstrating the therapeutic potential of targeting this pathway. The contribution of mesangial cell proliferation to progressive glomerular injury is well established.
Complement-Mediated Glomerulopathies
Complement activation plays a role in several glomerular diseases, and mesangial cells produce complement factor H, which regulates complement activation and influences their own proliferation. Dysregulation of this autocrine loop may contribute to complement-mediated glomerulopathies. Understanding how complement factor H modulates mesangial cell proliferation could reveal new therapeutic targets.
From glomerular mesangial cell proliferation-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate mesangial cell proliferation? | CRISPR knockout in mesangial cell line (e.g., human or mouse mesangial cells) |
| Does a specific point mutation in gene X affect proliferation? | CRISPR point mutation knock-in in mesangial cells |
| Does overexpression of gene X drive proliferation? | CRISPR knock-in of a constitutive promoter or cDNA overexpression |
| Does tagged gene X localize to specific compartments during proliferation? | Tagged knock-in (e.g., GFP) in mesangial cells |
| Does gene X regulate proliferation in vivo? | Conditional knockout in mouse mesangium |
| Can we identify novel regulators of proliferation? | CRISPR library screening in mesangial cells |
How to Study the glomerular mesangial cell proliferation Process
| Method | What It Measures | Typical Application |
|---|---|---|
| BrdU/EdU incorporation | DNA synthesis | Quantifying mesangial cell proliferation |
| MTT assay | Metabolic activity | Assessing cell viability and proliferation |
| RNA-seq | Global gene expression | Identifying pathways regulating proliferation |
| Proteomics | Protein expression and modifications | Discovering novel regulators |
| Metabolomics | Metabolite levels | Studying metabolic reprogramming |
| Immunofluorescence | Protein localization and proliferation markers | Visualizing proliferating cells in tissue |
| Western blot | Protein expression and signaling | Validating pathway activation |
| CRISPR screening | Gene function at scale | Identifying novel regulators of proliferation |
Cell Proliferation Assays
Standard methods to measure mesangial cell proliferation include BrdU incorporation, EdU staining, MTT assay, and cell counting. These assays quantify DNA synthesis or metabolic activity as proxies for proliferation. They are widely used to test the effects of genetic manipulations or drug treatments on GO:0072110.
RNA Sequencing and Transcriptomics
RNA sequencing (RNA-seq) can identify differentially expressed genes and pathways in proliferating versus quiescent mesangial cells. This approach has been used to uncover the YY1/HIF-1alpha/mROS feedback loop and the GLDC-pyrimidine pathway. Transcriptomic profiling provides a global view of the molecular changes driving mesangial cell proliferation.
Proteomics and Metabolomics
Proteomic analysis can reveal changes in protein expression and post-translational modifications during mesangial cell proliferation. Metabolomics is particularly useful for studying metabolic reprogramming, such as the pyrimidine pathway activated by GLDC. These techniques complement transcriptomics to provide a comprehensive understanding of GO:0072110.
Imaging and Immunofluorescence
Immunofluorescence staining for proliferation markers (e.g., Ki-67, PCNA) and cell cycle proteins allows visualization of proliferating mesangial cells in tissue sections or cultured cells. Confocal microscopy can assess changes in actin cytoskeleton and cell morphology, as shown for complement factor H. These imaging methods are essential for validating findings from omics studies.
How CRISPR Can Be Used to Study GO:0072110 glomerular mesangial cell proliferation
Knockout
CRISPR knockout (KO) is used to completely ablate a candidate gene in mesangial cells to determine whether it is required for proliferation. For example, knocking out YY1 or HIF-1alpha can test their role in the YY1/HIF-1alpha/mROS feedback loop. KO models are essential for establishing causality in GO:0072110.
Point Mutation
CRISPR point mutation knock-in allows the introduction of specific amino acid substitutions to study the function of individual residues or domains. This is useful for dissecting signaling pathways where phosphorylation or other post-translational modifications are critical. For instance, mutating a phosphorylation site in PDGFR-beta could reveal its importance in mesangial cell proliferation.
Knock-in
CRISPR knock-in can be used to insert reporter genes (e.g., GFP) or tags into endogenous loci to track protein expression and localization during proliferation. It can also be used to overexpress a gene of interest by inserting a strong promoter. Knock-in models help study the dynamics of regulators like circRNA Arf3 or complement factor H.
Overexpression
CRISPR activation (CRISPRa) or cDNA overexpression can drive high-level expression of a candidate gene to test whether it is sufficient to induce proliferation. Overexpressing circRNA Arf3, for example, suppresses proliferation, confirming its negative regulatory role. Overexpression models are valuable for identifying oncogenic or pro-proliferative factors in GO:0072110.
How EDITGENE Supports glomerular mesangial cell proliferation Research
Researchers studying glomerular mesangial cell proliferation-related genes often need to determine whether a candidate gene is causally involved in the process, and CRISPR-based models provide the most direct way to test this. EDITGENE offers a comprehensive suite of services to support such studies, from knockout to overexpression and library screening.
Contact EDITGENE today to design your custom CRISPR model for glomerular mesangial cell proliferation research.
Frequently Asked Questions About glomerular mesangial cell proliferation
What is glomerular mesangial cell proliferation?
Glomerular mesangial cell proliferation (GO:0072110) is the biological process by which mesangial cells multiply, increasing their population within the glomerulus.
What genes are involved in glomerular mesangial cell proliferation?
Key genes include PDGF-B, PDGFR-beta, YY1, HIF-1alpha, CFH, GLDC, and circRNA Arf3, among others.
How is glomerular mesangial cell proliferation regulated?
It is regulated by growth factors (e.g., PDGF-B), signaling pathways (MAPK, PI3K/Akt), metabolic enzymes (GLDC), and non-coding RNAs (circRNA Arf3).
What diseases are associated with mesangial cell proliferation?
Diabetic nephropathy, IgA nephropathy, mesangioproliferative glomerulonephritis, and complement-mediated glomerulopathies.
How can I study mesangial cell proliferation in the lab?
Common methods include BrdU/EdU incorporation, MTT assay, RNA-seq, proteomics, and CRISPR knockout models.
What is the role of PDGF-B in mesangial cell proliferation?
PDGF-B is a potent mitogen that activates PDGFR-beta, driving mesangial cell proliferation; its inhibition reduces proliferation.
What is the YY1/HIF-1alpha/mROS feedback loop?
It is a positive-feedback loop that exacerbates mesangial cell proliferation in diabetic kidney disease by sustaining HIF-1alpha and mitochondrial ROS.
How does glycine decarboxylase affect mesangial cells?
GLDC boosts mesangial cell proliferation through the pyrimidine pathway, contributing to IgA nephropathy progression.
What is the role of circRNA Arf3 in mesangial cell proliferation?
CircRNA Arf3 suppresses proliferation and fibrosis via the miR-107-3p/Tmbim6 axis in diabetic nephropathy.
Can CRISPR be used to study mesangial cell proliferation?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are powerful tools to dissect gene function in GO:0072110.
Conclusion
Glomerular mesangial cell proliferation (GO:0072110) is a fundamental biological process that becomes pathogenic in many kidney diseases. The identification of key regulators such as PDGF-B, YY1/HIF-1alpha/mROS, GLDC, and circRNA Arf3 has advanced our understanding of the molecular mechanisms driving proliferation. Targeting these pathways holds promise for therapeutic intervention in diabetic nephropathy, IgA nephropathy, and other glomerular diseases. CRISPR-based functional genomics, combined with transcriptomics, proteomics, and metabolomics, provides a robust toolkit for dissecting the regulatory network of GO:0072110. EDITGENE's services in knockout, point mutation, knock-in, overexpression, and library screening empower researchers to accelerate discoveries in this field.
References
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- 4. Yang TT et al.. 2025. YY1/HIF-1α/mROS positive-feedback loop exacerbates glomerular mesangial cell proliferation in mouse early diabetic kidney disease.. Acta Pharmacol Sin 46(7):1974-1989 PMID: 40038466
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- 7. Zhang L et al.. 2024. CircRNA Arf3 suppresses glomerular mesangial cell proliferation and fibrosis in diabetic nephropathy via miR-107-3p/Tmbim6 axis.. J Bioenerg Biomembr 56(5):543-552 PMID: 39120858
- 8. Salva E et al.. 2017. Inhibition of Glomerular Mesangial Cell Proliferation by siPDGF-B- and siPDGFR-β-Containing Chitosan Nanoplexes.. AAPS PharmSciTech 18(4):1031-1042 PMID: 27975193
