GO:0071231 cellular response to folic acid: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0071231 (cellular response to folic acid) describes any change in a cell's state or activity caused by a folic acid (vitamin B9) stimulus, including changes in gene expression, enzyme production, secretion and movement.
• Folic acid is a synthetic, oxidized folate that cells must reduce and metabolize to enter one-carbon metabolism; the cellular response therefore integrates transport, reduction, polyglutamation and one-carbon transfer reactions.
• The response is best documented in immune cells, where folic acid modulates inflammatory signaling in LPS-activated macrophages and microglia, and in inherited disorders of folate metabolism such as MTHFD1 deficiency, where patient cells respond to folic and folinic acid treatment.
• Dietary folic acid also drives metabolic remodeling in vivo, including sex-specific effects mediated by ceramide synthase 6 (CerS6), and folic acid-induced nephropathy is a widely used experimental model of kidney fibrosis linked to CCN2 and cellular senescence.
• Folic acid is a high-affinity ligand for folate receptor alpha (FOLR1), which is exploited in nanomedicine to deliver drugs, siRNA and inorganic nanoparticles selectively to cancer cells.
• Studying GO:0071231 requires combining CRISPR knockout, point-mutation and knock-in models with transcriptomics, proteomics and functional assays to separate causal genes from correlative markers.
Description
GO:0071231, cellular response to folic acid, is a Gene Ontology biological process term defined as any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a folic acid stimulus. Folic acid (vitamin B9) is an essential micronutrient that cells cannot synthesize and must acquire or import; once inside the cell it is reduced and converted into tetrahydrofolate derivatives that feed one-carbon metabolism, nucleotide synthesis and methylation reactions. Because the term is defined by the stimulus rather than by a single pathway, the cellular response to folic acid spans membrane transport, intracellular reduction and polyglutamation, changes in gene expression, and downstream signaling events. The term matters because folate status is a modifiable environmental input that shapes immune function, proliferation and epigenetic state. In LPS-activated THP-1 macrophages, folic acid improves the inflammatory response and alters cytokine output, and in LPS-activated microglia it polarizes the inflammatory response by regulating multiple signaling pathways. In patients with MTHFD1 deficiency, cellular phenotypes respond to folic and folinic acid treatment, directly linking the cellular response to a treatable inherited condition. In vivo, dietary folic acid produces sex-specific metabolic responses that depend on ceramide synthase 6, and folic acid-induced nephropathy is used experimentally to model kidney fibrosis through CCN2 and cellular senescence. Finally, the cellular response to folic acid is the biological basis for folate-targeted drug delivery. Folic acid-decorated zeolitic imidazolate frameworks loaded with baicalin improve breast cancer therapy, copper nanocrystalline-doped folic acid-based carbon dots enhance antitumor effects in response to tumor microenvironment stimuli, and ultrasound-responsive nanocarriers combining siRNA and Fe3O4 exploit folate targeting to regulate macrophage polarization and phagocytosis in non-small cell lung cancer immunotherapy. These examples show that GO:0071231 is not only a metabolic annotation but a translational handle for imaging, delivery and immunotherapy research.
cellular response to folic acid At A Glance
| GO ID | GO:0071231 |
|---|---|
| GO term | cellular response to folic acid |
| Ontology | biological_process |
| Synonym | response to folate; response to vitamin B9 |
| Definition | Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a folic acid stimulus. |
| Major function | Converts extracellular or dietary folate availability into intracellular one-carbon metabolism, transcriptional, secretory and proliferative responses. |
| Stimulus | Folic acid (vitamin B9), a synthetic oxidized folate that requires reduction and polyglutamation for cellular use. |
| Representative cell types | Macrophages, microglia, epithelial and cancer cells, and patient-derived cells with inherited folate enzyme defects. |
| Disease relevance | Inflammatory and immune regulation, inherited folate metabolism disorders, kidney fibrosis, and folate-receptor-targeted cancer therapy. |
What Is GO:0071231?
In plain terms, GO:0071231 describes everything a cell does differently when it senses folic acid. The official QuickGO definition is: any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a folic acid stimulus. It is a biological_process term with synonyms response to folate and response to vitamin B9. The definition is deliberately broad: it covers immediate biochemical events such as folate transport and reduction, intermediate responses such as changes in enzyme activity and one-carbon flux, and long-term responses such as altered transcription, proliferation, differentiation and secretion. Because the stimulus is a vitamin rather than a single receptor ligand, the term is best understood as an input-output module in which folate availability is converted into cellular decisions.
Why Is cellular response to folic acid Important in Cell Biology?
GO:0071231 is important because folate is one of the few environmental inputs that directly controls both the epigenome and nucleotide supply, so the cellular response to folic acid sits at the intersection of metabolism, immunity and proliferation. Experimental evidence shows that folic acid changes inflammatory signaling in activated macrophages and microglia, that cells from MTHFD1-deficient patients respond to folic and folinic acid treatment, and that dietary folic acid triggers sex-specific metabolic remodeling through ceramide synthase 6. In disease models, folic acid-induced nephropathy is used to study kidney fibrosis and cellular senescence via CCN2, while folate receptor targeting is a validated strategy for delivering drugs, siRNA and nanoparticles to tumors. For researchers, the term therefore provides a mechanistic framework for asking how a vitamin stimulus is sensed, transduced and translated into cell fate decisions.
• Defines a stimulus-driven process that links nutrition to gene expression, enzyme production and secretion.
• Explains how folic acid modulates inflammatory cytokine output in LPS-activated macrophages and microglia.
• Provides a mechanistic basis for treating inherited folate metabolism disorders such as MTHFD1 deficiency with folic or folinic acid.
• Connects dietary folate to sex-specific metabolic remodeling through ceramide synthase 6 in vivo.
• Underpins the folic acid-induced nephropathy model of kidney fibrosis and cellular senescence involving CCN2.
• Supports folate receptor-targeted nanomedicine for breast cancer and other tumors.
• Enables folate-targeted, ultrasound-responsive delivery of siRNA and Fe3O4 to regulate macrophage polarization in lung cancer immunotherapy.
• Provides a conceptual framework for separating transport, reduction, one-carbon transfer and transcriptional outputs in CRISPR screens.
• Helps interpret how folate availability alters proliferation, methylation potential and redox balance in cultured cells.
• Guides design of rescue experiments in which folic or folinic acid is added to cells carrying metabolic gene edits.
What Happens During cellular response to folic acid?
Folate uptake and receptor-mediated internalization
In simple terms: The cell first has to get folic acid inside, either through transporters or by binding it to folate receptors that are taken up.
The cellular response to folic acid begins with delivery of the vitamin to the cell surface. Folic acid is a high-affinity ligand for folate receptors, and this property is exploited experimentally: folic acid-decorated zeolitic imidazolate frameworks loaded with baicalin are internalized by folate receptor-positive breast cancer cells to improve therapy, and folic acid-based super carbon dots doped with copper nanocrystals are taken up in a tumor-microenvironment-responsive manner. In immunotherapy settings, folate-targeted ultrasound-responsive nanocarriers carrying siRNA and Fe3O4 are used to regulate macrophage polarization and phagocytosis in non-small cell lung cancer. These studies show that the first committed step of the response is recognition and internalization of the folic acid stimulus, which determines the magnitude of all downstream events.
Intracellular reduction and one-carbon metabolism
In simple terms: Once inside, folic acid must be chemically converted into the active forms that carry one-carbon units for building DNA and controlling methylation.
Inside the cell, folic acid is reduced and converted into tetrahydrofolate derivatives that donate one-carbon units to nucleotide synthesis and methylation. The clinical importance of this step is illustrated by MTHFD1 deficiency, in which four new patients were characterized and their cells were delineated and shown to respond to folic and folinic acid treatment. This demonstrates that the cellular response to folic acid includes enzymatic steps that can be bypassed or rescued by providing reduced folate forms, and that patient-derived cells are a tractable system for dissecting the pathway. The response therefore depends on the integrity of the folate cycle enzymes that interconvert folic acid, folinic acid and tetrahydrofolate species.
Inflammatory and immune signaling outputs
In simple terms: Folic acid does not just feed metabolism; it also changes how immune cells talk and respond to inflammatory triggers.
A major documented output of the cellular response to folic acid is modulation of inflammatory signaling. In LPS-activated THP-1 macrophages, folic acid improves the inflammatory response, indicating that the vitamin alters cytokine and mediator production in activated myeloid cells. In LPS-activated microglia, folic acid polarizes the inflammatory response by regulating multiple signaling pathways, showing that the response is not a single linear cascade but a network of signaling changes. These findings are important because they establish that GO:0071231 includes changes in secretion and gene expression that are measurable by cytokine assays and pathway profiling, and they provide a rationale for studying folate status in neuroinflammation and macrophage biology.
Metabolic remodeling and tissue-level consequences
In simple terms: When folic acid intake changes, whole-body metabolism can shift, and the direction of the shift can differ between males and females.
The cellular response to folic acid scales up to organism-level metabolic remodeling. Dietary folic acid produces a sex-specific metabolic response in mice that is mediated by ceramide synthase 6, linking folate intake to sphingolipid metabolism and metabolic phenotype. In the kidney, folic acid administration is used to induce experimental nephropathy, and CCN2 has been shown to activate cellular senescence leading to kidney fibrosis in this model. Together these studies show that the cellular response to folic acid can culminate in senescence, fibrosis and systemic metabolic change, making it relevant to chronic disease research as well as to basic vitamin biology.
Folate-targeted delivery as an applied output
In simple terms: Because cells take up folic acid so efficiently, researchers attach it to drugs and nanoparticles to sneak therapies into target cells.
The same uptake machinery that initiates the cellular response to folic acid is used for targeted delivery. Folic acid decoration of ZIF-8 nanoparticles loaded with baicalin improves breast cancer therapy by exploiting folate receptor-mediated internalization. Copper nanocrystalline-doped folic acid-based super carbon dots enhance antitumor effects in response to tumor microenvironment stimuli, combining folate targeting with stimuli-responsive behavior. Ultrasound-responsive nanocarriers bearing folic acid, siRNA and Fe3O4 regulate macrophage polarization and phagocytosis to augment non-small cell lung cancer immunotherapy. These applications demonstrate that the cellular response to folic acid is both a biological process and a design principle for experimental therapeutics.
Key Genes Involved in GO:0071231 cellular response to folic acid
The genes and proteins below are experimentally implicated in the cellular response to folic acid, spanning folate transport, one-carbon metabolism, inflammatory signaling, senescence and lipid metabolism.
| Gene | Major Role | Research Relevance |
|---|---|---|
| FOLR1 | Folate receptor alpha that binds folic acid with high affinity and mediates internalization. | Target for folic acid-decorated nanoparticles in breast cancer and other folate receptor-positive tumors. |
| MTHFD1 | One-carbon metabolism enzyme; deficiency alters folate-dependent reactions. | Patient cells with MTHFD1 deficiency respond to folic and folinic acid treatment, providing a rescue model. |
| CCN2 | Matricellular protein that activates cellular senescence in folic acid-induced nephropathy. | Central mediator of kidney fibrosis in the folic acid nephropathy model. |
| CERSS6 (CerS6) | Ceramide synthase 6; mediates sex-specific metabolic response to dietary folic acid. | Required for the sex-specific metabolic remodeling observed with altered dietary folate in mice. |
| IL6 | Inflammatory cytokine whose output is modulated by folic acid in activated macrophages. | Readout of the inflammatory arm of the cellular response to folic acid. |
| TNF | Pro-inflammatory cytokine influenced by folate status in activated myeloid cells. | Measurable output of folic acid modulation of inflammatory signaling. |
| IL1B | Interleukin-1 beta; part of the inflammatory response altered by folic acid. | Marker of microglial and macrophage polarization changes induced by folic acid. |
| NFKB1 | Transcription factor downstream of inflammatory stimuli; modulated by folate status. | Candidate node linking folic acid to multiple signaling pathways in microglia. |
| MAPK1 | Kinase in signaling cascades affected by folic acid in activated immune cells. | Pathway component implicated in folate-dependent polarization of microglia. |
| MAPK3 | Kinase in signaling cascades affected by folic acid in activated immune cells. | Pathway component implicated in folate-dependent polarization of microglia. |
| MTHFR | Folate cycle enzyme that generates methyl donor precursors. | Relevant to interpreting how folic acid availability changes methylation potential in cells. |
| MTR | Methionine synthase; links folate cycle to methylation reactions. | Downstream node of one-carbon metabolism initiated by folic acid uptake. |
| SHMT1 | Serine hydroxymethyltransferase; contributes one-carbon units to the folate pool. | Candidate gene for dissecting how folic acid changes nucleotide synthesis. |
| TYMS | Thymidylate synthase; consumes folate-derived one-carbon units for DNA synthesis. | Links the cellular response to folic acid to proliferation and nucleotide supply. |
| SLC19A1 | Reduced folate carrier family transporter involved in folate uptake. | Transport node determining how much folic acid enters the cell. |
| GCLC | Glutamate-cysteine ligase catalytic subunit; related to redox balance influenced by folate. | Candidate for studying oxidative stress in folate-responsive cells. |
| BAX | Apoptosis regulator potentially affected by folate status in cancer cells. | Readout in folate-targeted nanotherapy studies. |
| CASP3 | Executioner caspase; apoptosis marker in folate-targeted antitumor studies. | Functional endpoint in folic acid-based nanoparticle therapy experiments. |
How Is cellular response to folic acid Regulated?
The cellular response to folic acid is regulated at multiple levels. At the entry step, folate receptor and transporter availability determines how much stimulus reaches the cytoplasm, which is why folate receptor-positive cells internalize folic acid-decorated nanoparticles efficiently. Inside the cell, the response is constrained by the enzymes of one-carbon metabolism; in MTHFD1 deficiency, providing folic or folinic acid can modulate the cellular phenotype, showing that pathway flux is a regulated and rescuable variable. In immune cells, the response is gated by activation state: folic acid improves the inflammatory response in LPS-activated THP-1 macrophages and polarizes the inflammatory response in LPS-activated microglia through multiple signaling pathways, indicating that inflammatory signaling networks set the context in which folate acts. At the organism level, dietary folic acid regulation is sex-specific and depends on ceramide synthase 6, demonstrating hormonal or metabolic gating of the response. Finally, in the kidney, folic acid-induced injury triggers CCN2-dependent cellular senescence and fibrosis, showing that the response can be amplified into a pathological regulatory loop.
cellular response to folic acid and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| MTHFD1 | Inherited one-carbon metabolism disorder with cellular response to folic and folinic acid | Patient-derived cells and CRISPR-corrected isogenic lines treated with folic or folinic acid |
| CCN2 | Folic acid-induced nephropathy and kidney fibrosis via cellular senescence | Mouse folic acid nephropathy model with CCN2 knockout or knockdown |
| CERSS6 (CerS6) | Sex-specific metabolic response to dietary folic acid | CerS6 knockout mice fed defined folate diets, with metabolic phenotyping |
| FOLR1 | Folate receptor-positive breast cancer and other tumors | Folate receptor-positive cancer cell lines with folic acid-decorated nanoparticles |
| Inflammatory genes (IL6, TNF, IL1B) | Folic acid modulation of macrophage and microglial inflammation | LPS-activated THP-1 macrophages and microglia treated with folic acid |
Inherited disorders of folate metabolism
MTHFD1 deficiency is a rare inherited disorder in which the cellular response to folic acid is impaired. Four new patients were characterized, and cellular delineation showed that patient cells respond to folic and folinic acid treatment, providing direct evidence that the cellular response to folic acid is clinically actionable. This makes MTHFD1-deficient cells a valuable model for testing whether gene edits that alter one-carbon metabolism can be rescued by folate supplementation.
Inflammation, neuroinflammation and immune regulation
Folic acid modulates inflammatory signaling in activated myeloid cells. In LPS-activated THP-1 macrophages, folic acid improves the inflammatory response, and in LPS-activated microglia it polarizes the inflammatory response by regulating multiple signaling pathways. These findings link GO:0071231 to diseases with an inflammatory component, including neuroinflammatory conditions, and suggest that folate status may modify the magnitude of cytokine responses in macrophages and microglia.
Kidney fibrosis and cellular senescence
Folic acid-induced nephropathy is an established experimental model of kidney fibrosis. In this model, CCN2 activates cellular senescence leading to kidney fibrosis, directly connecting the cellular response to folic acid with a senescence-driven fibrotic program. This provides a disease-relevant context for studying how a vitamin stimulus can trigger chronic tissue remodeling and for testing anti-fibrotic or senolytic interventions.
Cancer and folate-targeted therapy
Folate receptor-mediated uptake is exploited in oncology. Folic acid-decorated ZIF-8 nanoparticles loaded with baicalin improve breast cancer therapy, copper nanocrystalline-doped folic acid-based super carbon dots enhance antitumor effects in response to tumor microenvironment stimuli, and ultrasound-responsive nanocarriers with siRNA and Fe3O4 regulate macrophage polarization and phagocytosis for augmented non-small cell lung cancer immunotherapy. These studies show that the cellular response to folic acid can be redirected for therapeutic benefit in cancer.
From cellular response to folic acid-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate folate metabolism gene required for the cellular response to folic acid? | CRISPR knockout of the gene in a folate-responsive cell line, followed by folic acid stimulation and readout of one-carbon metabolites or inflammatory markers |
| Does a specific patient variant alter the response to folic or folinic acid? | Point-mutation knock-in of the variant into an isogenic cell line, then treatment with folic or folinic acid |
| Can a reporter track the cellular response to folic acid in live cells? | Tagged knock-in of a fluorescent or luminescent reporter at a folate-responsive locus, with imaging after folic acid stimulation |
| Does overexpression of a folate pathway gene amplify or dampen the response? | Overexpression cell model in a folate-responsive line, with transcriptomic and cytokine profiling after folic acid treatment |
| Which genes mediate folate-dependent metabolic remodeling in vivo? | Knockout mouse fed defined folate diets, with sex-specific metabolic phenotyping |
| Does folate targeting improve delivery to tumor cells? | Folate receptor-positive cancer cells treated with folic acid-decorated nanoparticles carrying drugs or siRNA |
How to Study the cellular response to folic acid Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA sequencing | Global transcriptional changes after folic acid stimulation | Defining the gene expression output of GO:0071231 in macrophages or microglia |
| Metabolomics | Folate species and one-carbon cycle intermediates | Assessing whether gene edits alter folate metabolism and rescue with folinic acid |
| Cytokine ELISA | Secretion of inflammatory mediators | Quantifying folic acid modulation of LPS-activated macrophage and microglial responses |
| Phagocytosis assay | Macrophage uptake and polarization function | Testing folate-targeted nanocarrier effects in lung cancer immunotherapy models |
| Confocal microscopy | Cellular uptake and localization of folate-decorated nanoparticles | Tracking folic acid-based delivery systems in cancer cells |
| Western blotting | Protein expression and signaling pathway activation | Measuring pathway changes in folic acid-treated immune cells |
| Senescence assays | Senescence markers in kidney cells | Studying CCN2-driven senescence in folic acid-induced nephropathy |
| Metabolic phenotyping | Sex-specific metabolic parameters in vivo | Evaluating CerS6-dependent responses to dietary folic acid |
Transcriptomic and pathway profiling
RNA sequencing and pathway analysis are used to define the gene expression changes that constitute the cellular response to folic acid. In LPS-activated microglia, folic acid polarizes the inflammatory response by regulating multiple signaling pathways, which can be resolved by transcriptomic profiling of treated versus untreated cells. In macrophages, folic acid improves the inflammatory response, and cytokine gene expression is a direct readout of the response. These approaches identify the transcriptional output of GO:0071231 and nominate candidate genes for CRISPR validation.
Metabolomics and one-carbon flux measurement
Because the cellular response to folic acid converges on one-carbon metabolism, metabolite profiling is essential. MTHFD1 deficiency studies used cellular delineation and response to folic and folinic acid treatment to connect genotype to metabolic phenotype. Measuring folate species, methionine cycle intermediates and nucleotide precursors allows researchers to determine whether a gene edit blocks, reroutes or rescues the response.
Functional immune assays
Cytokine secretion, phagocytosis and polarization assays are used to quantify the immune arm of the cellular response to folic acid. Folic acid improves the inflammatory response in LPS-activated THP-1 macrophages, and folate-targeted nanocarriers regulate macrophage polarization and phagocytosis in non-small cell lung cancer immunotherapy models. These functional assays translate molecular changes into immune outcomes.
Imaging and nanoparticle tracking
Fluorescence and electron microscopy are used to follow folic acid-decorated nanoparticles and their cargo into cells. Folic acid-decorated ZIF-8 nanoparticles loaded with baicalin are tracked in breast cancer cells, copper nanocrystalline-doped folic acid-based carbon dots are imaged in tumor microenvironment conditions, and ultrasound-responsive nanocarriers with siRNA and Fe3O4 are monitored for macrophage uptake. Imaging connects the uptake step of GO:0071231 to downstream therapeutic effects.
How CRISPR Can Be Used to Study GO:0071231 cellular response to folic acid
Knockout
CRISPR knockout is used to test whether a candidate gene is required for the cellular response to folic acid. Deleting a folate metabolism enzyme such as MTHFD1 or a transporter would be expected to blunt the response, and the phenotype can be compared with patient cells that respond to folic and folinic acid treatment. Knockout of inflammatory signaling genes in macrophages or microglia can determine which pathways mediate folic acid-dependent changes in cytokine output. In vivo, knockout of CerS6 is used to test whether it is required for the sex-specific metabolic response to dietary folic acid.
Point Mutation
Point-mutation knock-in allows researchers to model patient-specific variants in folate metabolism genes and ask whether they alter the cellular response to folic acid. This is directly relevant to MTHFD1 deficiency, where cellular phenotypes respond to folic and folinic acid treatment, and where the precise variant may determine the degree of rescue. Isogenic point-mutant lines also allow clean comparison of signaling outputs in immune cells treated with folic acid, without confounding from clonal variation.
Knock-in
Knock-in strategies are used to add reporters or tags that make the cellular response to folic acid measurable in real time. A fluorescent reporter knocked into a folate-responsive locus enables live imaging of transcriptional activation after folic acid stimulation. Tagged knock-in of a folate metabolism enzyme allows immunoprecipitation and interaction studies, helping to define the protein complexes that execute the response. These models are especially useful when the response is dynamic and context-dependent.
Overexpression
Overexpression cell models test whether increasing the dose of a folate pathway or signaling gene amplifies or dampens the cellular response to folic acid. Overexpressing a transporter or enzyme may sensitize cells to folic acid, while overexpressing an anti-inflammatory regulator may blunt the response in macrophages or microglia. Overexpression is also used in cancer cells to test whether folate receptor levels determine the efficacy of folic acid-decorated nanoparticles.
How EDITGENE Supports cellular response to folic acid Research
Researchers studying cellular response to folic acid-related genes often need to determine whether a candidate gene is causally involved in folate sensing, one-carbon flux or downstream inflammatory and metabolic outputs, rather than merely correlated with them. Answering that question requires isogenic, well-controlled cell models in which a single gene is deleted, mutated, tagged or overexpressed, combined with quantitative readouts of the response. EDITGENE provides these models and the supporting screening and bioinformatics services so that folate biology can be dissected with publication-grade rigor.
Contact EDITGENE today to design your custom CRISPR model for cellular response to folic acid research.
Frequently Asked Questions About cellular response to folic acid
What is GO:0071231 cellular response to folic acid?
GO:0071231 is a Gene Ontology biological_process term defined as any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a folic acid stimulus. It has synonyms response to folate and response to vitamin B9.
What genes are involved in the cellular response to folic acid?
Genes involved include folate receptor FOLR1, one-carbon metabolism enzymes such as MTHFD1, MTHFR, MTR, SHMT1 and TYMS, transporters such as SLC19A1, and inflammatory signaling genes such as IL6, TNF, IL1B, NFKB1, MAPK1 and MAPK3, as well as CCN2 in kidney fibrosis models and CerS6 in dietary folate responses.
How does folic acid change gene expression in immune cells?
In LPS-activated THP-1 macrophages, folic acid improves the inflammatory response, and in LPS-activated microglia it polarizes the inflammatory response by regulating multiple signaling pathways, indicating changes in cytokine gene expression and pathway activity.
What is the role of MTHFD1 in the cellular response to folic acid?
MTHFD1 is a one-carbon metabolism enzyme; in MTHFD1 deficiency, patient cells show a cellular phenotype that responds to folic and folinic acid treatment, linking the gene directly to the cellular response to folic acid.
Can the cellular response to folic acid be studied with CRISPR?
Yes. CRISPR knockout, point-mutation knock-in, tagged knock-in and overexpression models allow researchers to test whether specific genes are required for or modify the response, and pooled CRISPR screens can identify new regulators.
Why is folic acid used to target cancer nanoparticles?
Folic acid binds folate receptors with high affinity, so decorating nanoparticles with folic acid improves uptake in folate receptor-positive cancer cells, as shown for ZIF-8 nanoparticles loaded with baicalin in breast cancer and for copper-doped carbon dots and siRNA-loaded nanocarriers.
What is folic acid-induced nephropathy?
Folic acid-induced nephropathy is an experimental model of kidney injury and fibrosis in which CCN2 activates cellular senescence leading to kidney fibrosis, making it a disease-relevant context for studying the cellular response to folic acid.
Does dietary folic acid affect metabolism differently in males and females?
Yes. Ceramide synthase 6 mediates a sex-specific metabolic response to dietary folic acid in mice, showing that the organism-level response to folate is gated by lipid metabolism genes and sex.
What methods are used to study the cellular response to folic acid?
Common methods include RNA sequencing, metabolomics, cytokine ELISA, phagocytosis assays, confocal imaging of folate-decorated nanoparticles, western blotting, senescence assays and in vivo metabolic phenotyping.
How can EDITGENE help with cellular response to folic acid research?
EDITGENE provides knockout, point-mutation, knock-in, tagged knock-in and overexpression cell models, pooled CRISPR library screening and bioinformatics services to identify and validate genes that control the cellular response to folic acid.
Conclusion
GO:0071231 cellular response to folic acid captures a biologically central process in which a vitamin stimulus is converted into metabolic, transcriptional, secretory and proliferative changes. Published work shows that this response operates in immune cells, is disrupted in inherited disorders such as MTHFD1 deficiency where folic and folinic acid can rescue cellular phenotypes, drives sex-specific metabolic remodeling through CerS6, and contributes to kidney fibrosis via CCN2-dependent senescence. It is also the biological basis for folate-targeted cancer nanomedicine. Because the term is defined by stimulus rather than by a single pathway, rigorous study requires causal models. CRISPR knockout, point-mutation, knock-in and overexpression cell lines, combined with CRISPR library screening and bioinformatics, allow researchers to move from correlation to mechanism and to identify which genes truly govern the cellular response to folic acid.
References
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- 5. Li M et al.. 2024. Ultrasound-responsive nanocarriers with siRNA and Fe(3)O(4) regulate macrophage polarization and phagocytosis for augmented non-small cell lung cancer immunotherapy.. J Nanobiotechnology 22(1):605 PMID: 39375761
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