GO:0071301 cellular response to vitamin B1: Metabolic Signaling, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0071301 describes how a cell changes its state or activity in response to vitamin B1 (thiamine).
• Vitamin B1 is converted to thiamine pyrophosphate (TPP), an essential cofactor for enzymes in carbohydrate metabolism and alpha-oxidation.
• Cellular responses include altered expression of thiamine transporters and metabolic enzymes, affecting energy production and redox balance.
• Defects in thiamine metabolism cause diseases such as thiamine-responsive megaloblastic anemia syndrome.
• Thiamine deficiency contributes to diabetic complications and sepsis-associated metabolic derangements.
• CRISPR knockout, knock-in, and overexpression models enable causal dissection of genes mediating cellular responses to vitamin B1.
Description
Cellular response to vitamin B1 (GO:0071301) is a biological process that encompasses all changes in a cell's state or activity following exposure to vitamin B1 (thiamine). Vitamin B1 is a water-soluble vitamin that must be obtained from the diet and is essential for normal cellular function. Once inside the cell, thiamine is phosphorylated to thiamine pyrophosphate (TPP), which serves as a cofactor for key enzymes in glycolysis, the pentose phosphate pathway, and branched-chain amino acid metabolism. The cellular response to vitamin B1 therefore integrates nutrient sensing with metabolic regulation, ensuring adequate energy production and biosynthetic capacity. Research on GO:0071301 is important because thiamine deficiency and impaired cellular responses to vitamin B1 are linked to severe human disorders, including thiamine-responsive megaloblastic anemia syndrome, diabetic complications, and sepsis-associated metabolic failure. Moreover, thiamine metabolism is a target for antimicrobial and anticancer strategies, as demonstrated by inhibitors of thiamine thiazole synthase in Botrytis cinerea. Understanding how cells respond to vitamin B1 at the molecular level can reveal therapeutic vulnerabilities and biomarkers. This article provides a research-grade overview of GO:0071301, covering its definition, key genes, regulatory mechanisms, disease associations, and experimental models. All statements are based on published literature and the QuickGO definition, with citations to verified references.
cellular response to vitamin B1 At A Glance
| GO ID | GO:0071301 |
|---|---|
| GO term | cellular response to vitamin B1 |
| Ontology | biological_process |
| Synonym | cellular response to thiamin; cellular response to thiamine |
| Major function | Mediates cellular adaptation to vitamin B1 availability, including metabolic and transcriptional changes |
| Related cofactor | Thiamine pyrophosphate (TPP) |
| Key enzymes | Thiamine pyrophosphate-dependent enzymes (e.g., pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase) |
| Associated diseases | Thiamine-responsive megaloblastic anemia syndrome, diabetic complications, sepsis |
What Is GO:0071301?
According to the Gene Ontology, GO:0071301 (cellular response to vitamin B1) is 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 vitamin B1 stimulus. This term is a child of 'response to vitamin B1' and is specific to cellular-level responses. It includes signaling events, transcriptional changes, and metabolic adaptations triggered by thiamine or its derivatives.
Why Is cellular response to vitamin B1 Important in Cell Biology?
Cellular response to vitamin B1 is critical for maintaining energy homeostasis and metabolic flexibility. Thiamine deficiency leads to impaired oxidative metabolism and can cause severe neurological and cardiovascular disorders. The process is also relevant to cancer biology, as thiamine metabolism supports rapid proliferation, and to infectious disease, where pathogens rely on thiamine synthesis. Understanding GO:0071301 can inform nutritional interventions and drug development.
• Thiamine is an essential vitamin; its cellular uptake and conversion to TPP are required for ATP production.
• Mutations in thiamine transporters cause thiamine-responsive megaloblastic anemia syndrome, a rare but treatable disorder.
• Thiamine deficiency is common in sepsis and contributes to metabolic acidosis and organ dysfunction.
• Diabetic complications are exacerbated by thiamine depletion and dicarbonyl stress, which can be mitigated by thiamine supplementation.
• Thiamine-dependent enzymes are targets for antimicrobials, as shown for Botrytis cinerea thiamine thiazole synthase.
• Cellular responses to vitamin B1 include regulation of thiamine transporters (SLC19A2, SLC19A3) and metabolic enzymes.
• Thiamine pyrophosphate is a cofactor for branched-chain alpha-ketoacid dehydrogenase, linking vitamin B1 to amino acid metabolism.
• Alpha-oxidation of fatty acids requires TPP, connecting vitamin B1 to lipid metabolism.
• Thiamine metabolism influences redox balance and oxidative stress responses.
• Modeling GO:0071301 with CRISPR enables identification of causal genes and therapeutic targets.
What Happens During cellular response to vitamin B1?
Thiamine uptake and phosphorylation
In simple terms: Cells take up vitamin B1 from the environment and convert it into an active form.
Vitamin B1 enters cells via specific transporters, including SLC19A2 and SLC19A3. Once inside, thiamine is phosphorylated by thiamine pyrophosphokinase to form thiamine pyrophosphate (TPP), the active cofactor. This step is essential for all downstream cellular responses.
Activation of TPP-dependent enzymes
In simple terms: TPP helps enzymes that break down sugars and amino acids to produce energy.
TPP serves as a cofactor for enzymes such as pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase, branched-chain alpha-ketoacid dehydrogenase, and 2-hydroxyphytanoyl-CoA lyase. These enzymes are central to glycolysis, the TCA cycle, amino acid catabolism, and alpha-oxidation of fatty acids. Their activity increases when thiamine is available, leading to enhanced ATP production and metabolic flux.
Transcriptional and signaling changes
In simple terms: The cell adjusts gene expression to match vitamin B1 levels.
Cellular response to vitamin B1 involves changes in gene expression, including upregulation of thiamine transporters and metabolic enzymes. For example, thiamine availability can influence the expression of SLC19A2 and SLC19A3. Additionally, thiamine metabolism intersects with signaling pathways that sense energy status, such as mTOR, though direct evidence in the context of GO:0071301 is limited.
Impact on redox and oxidative stress
In simple terms: Vitamin B1 helps control damaging molecules called reactive oxygen species.
Thiamine and its derivatives can directly scavenge reactive carbonyl species and reduce oxidative stress. Cellular responses to vitamin B1 therefore include modulation of redox balance, which is relevant to diabetic complications and sepsis.
Key Genes Involved in GO:0071301 cellular response to vitamin B1
The following genes and proteins are involved in cellular response to vitamin B1, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SLC19A2 | Thiamine transporter | Mutations cause thiamine-responsive megaloblastic anemia syndrome |
| SLC19A3 | Thiamine transporter | Expressed in brain; linked to thiamine metabolism |
| TPK1 | Thiamine pyrophosphokinase | Converts thiamine to TPP |
| PDHA1 | Pyruvate dehydrogenase E1 alpha | TPP-dependent enzyme in glucose metabolism |
| PDHB | Pyruvate dehydrogenase E1 beta | TPP-dependent enzyme |
| DLD | Dihydrolipoamide dehydrogenase | Component of TPP-dependent complexes |
| OGDH | Alpha-ketoglutarate dehydrogenase | TPP-dependent enzyme in TCA cycle |
| BCKDHA | Branched-chain alpha-ketoacid dehydrogenase E1 alpha | TPP-dependent enzyme in amino acid catabolism |
| BCKDHB | Branched-chain alpha-ketoacid dehydrogenase E1 beta | TPP-dependent enzyme |
| DBT | Dihydrolipoamide branched chain transacylase | Component of BCKDH complex |
| HACL1 | 2-hydroxyphytanoyl-CoA lyase | TPP-dependent enzyme in alpha-oxidation |
| THI1 | Thiamine thiazole synthase (plant/fungal) | Target of antimicrobials |
| SLC25A19 | Mitochondrial thiamine pyrophosphate carrier | Transports TPP into mitochondria |
| TPP1 | Thiamine pyrophosphokinase (yeast) | Model for thiamine metabolism |
| IL4 | Interleukin-4 | Induced in ILC2 cells by diet, potentially linked to vitamin B1 |
| GCLC | Glutamate-cysteine ligase catalytic subunit | Redox regulation in response to thiamine |
| NQO1 | NAD(P)H quinone dehydrogenase 1 | Oxidative stress response |
How Is cellular response to vitamin B1 Regulated?
Cellular response to vitamin B1 is regulated at multiple levels. Thiamine transporter expression is feedback-regulated by intracellular thiamine levels, ensuring adequate uptake without toxicity. The activity of TPP-dependent enzymes is controlled by substrate availability and by the intracellular concentration of TPP, which is maintained by thiamine pyrophosphokinase and phosphatases. Additionally, energy-sensing pathways such as mTOR may integrate thiamine status with cell growth, although direct evidence for mTOR regulation in GO:0071301 is limited. Oxidative stress can also modulate the response by affecting thiamine stability and transporter function.
cellular response to vitamin B1 and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SLC19A2 | Thiamine-responsive megaloblastic anemia syndrome | Knockout iPSC-derived hematopoietic cells |
| SLC19A3 | Thiamine metabolism dysfunction syndrome | Knockout neurons |
| PDHA1 | Pyruvate dehydrogenase deficiency | Point mutation knock-in mice |
| BCKDHA | Maple syrup urine disease | Knockout cell lines |
| HACL1 | Refsum disease-like alpha-oxidation defect | Knockout hepatocytes |
Thiamine-responsive megaloblastic anemia syndrome
Mutations in SLC19A2 cause thiamine-responsive megaloblastic anemia syndrome, characterized by megaloblastic anemia, diabetes mellitus, and sensorineural deafness. The disease is treatable with high-dose thiamine, highlighting the importance of cellular response to vitamin B1.
Diabetic complications
Thiamine deficiency is common in diabetes and contributes to diabetic complications through increased dicarbonyl stress and oxidative damage. Thiamine supplementation can prevent these complications by restoring TPP-dependent enzyme activity and reducing reactive carbonyls.
Sepsis and metabolic stress
Sepsis is associated with thiamine deficiency, which impairs pyruvate dehydrogenase activity and contributes to lactic acidosis. Cellular response to vitamin B1 is therefore critical for metabolic resuscitation in sepsis.
Fungal infections and antimicrobial targeting
The thiamine thiazole synthase THI1 is essential for thiamine biosynthesis in fungi such as Botrytis cinerea. Inhibitors of THI1 disrupt cellular response to vitamin B1 and represent potential antifungal agents.
From cellular response to vitamin B1-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does SLC19A2 mediate thiamine uptake? | SLC19A2 knockout HEK293 cells |
| What is the effect of TPK1 deficiency on TPP levels? | TPK1 knockout cell lines |
| How does thiamine affect PDH activity? | PDHA1 point mutation knock-in cells |
| Does thiamine supplementation rescue diabetic complications? | Overexpression of GCLC in endothelial cells |
| Can THI1 inhibitors block fungal growth? | THI1 knockout Botrytis cinerea |
| What genes are induced by thiamine in immune cells? | IL-4 reporter knock-in mice |
How to Study the cellular response to vitamin B1 Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Gene expression changes | Identify thiamine-responsive genes |
| Metabolomics | TPP and metabolic intermediates | Assess thiamine status |
| Enzyme activity assays | PDH, OGDH, BCKDH activity | Measure TPP-dependent enzyme function |
| CRISPR knockout screening | Gene essentiality | Discover regulators of thiamine response |
| Western blot | Protein levels | Validate transporter expression |
| Immunofluorescence | Protein localization | Study SLC19A2 trafficking |
| Seahorse assay | Oxygen consumption rate | Measure mitochondrial function |
| LC-MS/MS | Thiamine and TPP quantification | Pharmacokinetics |
Transcriptomics (RNA-seq)
RNA sequencing can identify global transcriptional changes in response to vitamin B1, including upregulation of thiamine transporters and metabolic enzymes.
Metabolomics and flux analysis
Metabolomics measures TPP levels and intermediates of TPP-dependent pathways, providing functional readouts of cellular response to vitamin B1.
Proteomics and enzyme activity assays
Western blotting and activity assays for pyruvate dehydrogenase and alpha-ketoglutarate dehydrogenase can quantify TPP-dependent enzyme function.
CRISPR screening
Genome-wide CRISPR knockout screens can identify genes required for cellular fitness under thiamine-limited or thiamine-rich conditions.
How CRISPR Can Be Used to Study GO:0071301 cellular response to vitamin B1
Knockout
CRISPR knockout of SLC19A2 or TPK1 can abolish cellular response to vitamin B1, providing a clean background to study downstream effects.
Point Mutation
Point mutations in PDHA1 or BCKDHA can mimic human disease alleles, allowing assessment of TPP binding and enzyme activity.
Knock-in
Knock-in of tagged SLC19A2 or TPK1 enables live-cell imaging and proteomic analysis of thiamine transporters.
Overexpression
Overexpression of GCLC or NQO1 can test whether enhancing antioxidant defense compensates for thiamine deficiency.
How EDITGENE Supports cellular response to vitamin B1 Research
Researchers studying cellular response to vitamin B1-related genes often need to determine whether a candidate gene is causally involved in thiamine uptake, TPP synthesis, or downstream metabolic adaptation. EDITGENE provides CRISPR-based cell models and screening services to accelerate this discovery.
Contact EDITGENE today to design your custom CRISPR model for cellular response to vitamin B1 research.
Frequently Asked Questions About cellular response to vitamin B1
What is cellular response to vitamin B1?
Cellular response to vitamin B1 (GO:0071301) is the process by which a cell changes its state or activity in response to vitamin B1 (thiamine).
What genes are involved in cellular response to vitamin B1?
Key genes include SLC19A2, SLC19A3, TPK1, PDHA1, PDHB, OGDH, BCKDHA, BCKDHB, DBT, and HACL1.
What diseases are associated with defects in cellular response to vitamin B1?
Thiamine-responsive megaloblastic anemia syndrome, diabetic complications, sepsis, and maple syrup urine disease.
How is thiamine converted to its active form?
Thiamine is phosphorylated by thiamine pyrophosphokinase (TPK1) to form thiamine pyrophosphate (TPP).
What is the role of TPP in metabolism?
TPP is a cofactor for enzymes in glycolysis, TCA cycle, branched-chain amino acid catabolism, and alpha-oxidation.
Can CRISPR be used to study cellular response to vitamin B1?
Yes, CRISPR knockout, knock-in, and overexpression models can dissect gene function in thiamine metabolism.
What are the symptoms of thiamine deficiency?
Thiamine deficiency can cause beriberi, Wernicke-Korsakoff syndrome, and metabolic acidosis.
How does thiamine affect diabetic complications?
Thiamine supplementation reduces dicarbonyl stress and oxidative damage, preventing diabetic complications.
Is thiamine metabolism a target for antifungal drugs?
Yes, inhibitors of thiamine thiazole synthase (THI1) in Botrytis cinerea show antifungal activity.
What methods are used to study cellular response to vitamin B1?
RNA-seq, metabolomics, enzyme activity assays, and CRISPR screens are commonly used.
Conclusion
Cellular response to vitamin B1 (GO:0071301) is a fundamental biological process that integrates nutrient sensing with metabolic regulation. Dysregulation of this process contributes to a range of human diseases, from rare genetic disorders to common metabolic complications. Continued research using CRISPR models and multi-omics approaches will uncover new therapeutic opportunities.
References
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- 2. Adam MP et al.. 1993. Thiamine-Responsive Megaloblastic Anemia Syndrome.. PMID: 20301459
- 3. Cui W et al.. 2023. Diet-mediated constitutive induction of novel IL-4+ ILC2 cells maintains intestinal homeostasis in mice.. J Exp Med 220(8) PMID: 37163450
- 4. McCarty MF et al.. 2022. Nutraceutical Prevention of Diabetic Complications-Focus on Dicarbonyl and Oxidative Stress.. Curr Issues Mol Biol 44(9):4314-4338 PMID: 36135209
- 5. Nunnally ME et al.. 2019. Sepsis - What's new in 2019?. Curr Opin Anaesthesiol 32(2):163-168 PMID: 30817389
- 6. Foulon V et al.. 2005. Breakdown of 2-hydroxylated straight chain fatty acids via peroxisomal 2-hydroxyphytanoyl-CoA lyase: a revised pathway for the alpha-oxidation of straight chain fatty acids.. J Biol Chem 280(11):9802-12 PMID: 15644336
- 7. Harris RA et al.. 1990. Regulation of the branched-chain alpha-ketoacid dehydrogenase and elucidation of a molecular basis for maple syrup urine disease.. Adv Enzyme Regul 30:245-63 PMID: 2403034
- 8. Sniekers M et al.. 2006. Thiamine pyrophosphate: an essential cofactor for the alpha-oxidation in mammals--implications for thiamine deficiencies?. Cell Mol Life Sci 63(13):1553-63 PMID: 16786225
