GO:0140214 positive regulation of long-chain fatty acid import into cell: Transport Regulation, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0140214 describes any process that activates or increases the frequency, rate or extent of long-chain fatty acid import into a cell.
• Long-chain fatty acid import supports membrane synthesis and energy metabolism, and its upregulation is linked to picornavirus replication organelle formation.
• The lysophosphatidylcholine transporter MFSD2A is essential for CD8+ memory T cell maintenance and secondary response to infection, highlighting the importance of lipid import regulation in immunity.
• Key proteins include long-chain acyl-CoA synthetases, fatty acid transport proteins, and lysophosphatidylcholine transporters such as MFSD2A.
• Dysregulation of long-chain fatty acid import is implicated in viral replication, immune cell dysfunction, and metabolic disorders.
• CRISPR knockout, knock-in, and overexpression models enable causal dissection of genes that positively regulate long-chain fatty acid import.
Description
Long-chain fatty acids (LCFAs) are essential building blocks for membrane lipids and energy sources, and their import into cells is tightly regulated. The Gene Ontology term GO:0140214, positive regulation of long-chain fatty acid import into cell, captures the processes that enhance this import. This term is critical for understanding how cells adjust lipid uptake in response to metabolic demands, infection, and immune challenges. Research has shown that increased long-chain acyl-CoA synthetase activity and fatty acid import are linked to membrane synthesis for the development of picornavirus replication organelles, demonstrating a direct role in viral pathogenesis. Additionally, the lysophosphatidylcholine transporter MFSD2A is essential for CD8+ memory T cell maintenance and secondary response to infection, underscoring the importance of regulated lipid import in adaptive immunity. These findings highlight that positive regulation of LCFA import is not merely a housekeeping function but a dynamic process with significant physiological and pathological consequences.
positive regulation of long-chain fatty acid import into cell At A Glance
| GO ID | GO:0140214 |
|---|---|
| GO term | positive regulation of long-chain fatty acid import into cell |
| Ontology | biological_process |
| Synonym | none |
| Major function | Upregulation of the import of long-chain fatty acids into cells |
| Related processes | Fatty acid transport, lipid metabolism, membrane synthesis |
| Key regulators | Long-chain acyl-CoA synthetases, MFSD2A, fatty acid transport proteins |
| Disease relevance | Viral replication, immune cell maintenance, metabolic disorders |
What Is GO:0140214?
GO:0140214 is defined as any process that activates or increases the frequency, rate or extent of long-chain fatty acid import into a cell. In other words, it encompasses the molecular events and regulatory mechanisms that boost the uptake of fatty acids with long carbon chains across the cell membrane. This term is a biological process and is a child of the broader regulation of long-chain fatty acid import.
Why Is positive regulation of long-chain fatty acid import into cell Important in Cell Biology?
Understanding positive regulation of long-chain fatty acid import is crucial because it sits at the intersection of metabolism, immunity, and infection. Cells must rapidly adjust lipid uptake to meet demands for membrane biogenesis during viral replication or immune cell activation. Dysregulation can lead to impaired immune memory or enhanced viral propagation, making this process a potential therapeutic target.
• Supports membrane synthesis for viral replication organelles, as shown for picornaviruses.
• Essential for CD8+ memory T cell maintenance and secondary response to infection.
• Impacts energy homeostasis and lipid storage in metabolic tissues.
• Contributes to immune cell function and survival.
• Potential target for antiviral strategies that limit viral replication.
• Relevant to metabolic disorders such as obesity and insulin resistance.
• Involved in cellular stress responses and membrane remodeling.
• Provides a model for studying regulated transport across the plasma membrane.
• Links lipid uptake to gene expression and signaling pathways.
• Offers opportunities for CRISPR-based functional genomics.
What Happens During positive regulation of long-chain fatty acid import into cell?
Initiation and Sensing of Lipid Demand
In simple terms: The cell detects that it needs more fatty acids and starts the import process.
Positive regulation begins when cellular sensors detect a need for long-chain fatty acids, often due to increased membrane synthesis or energy demands. For example, during picornavirus infection, increased long-chain acyl-CoA synthetase activity and fatty acid import are linked to membrane synthesis for replication organelles. This sensing triggers signaling pathways that enhance the expression or activity of transport proteins.
Activation of Transport Proteins
In simple terms: Proteins that bring fatty acids into the cell are turned on or made more active.
Key transporters and enzymes, such as long-chain acyl-CoA synthetases and MFSD2A, are activated or upregulated. MFSD2A, a lysophosphatidylcholine transporter, is essential for CD8+ memory T cell maintenance, indicating its role in regulated lipid import. Activation may involve post-translational modifications or increased gene expression.
Increased Import Rate
In simple terms: More fatty acids actually move into the cell.
Once transport proteins are activated, the rate of long-chain fatty acid import increases. This is evidenced by studies showing that increased fatty acid import is linked to membrane synthesis for picornavirus replication organelles. The imported fatty acids are then available for metabolic processes.
Downstream Metabolic Integration
In simple terms: The imported fatty acids are used for building membranes or energy.
Imported long-chain fatty acids are directed into pathways such as phospholipid synthesis, beta-oxidation, or storage. In CD8+ memory T cells, MFSD2A-mediated import supports cell maintenance and secondary response to infection. This integration ensures that the positive regulation serves the cell's physiological needs.
Key Genes Involved in GO:0140214 positive regulation of long-chain fatty acid import into cell
The following genes and proteins are involved in the positive regulation of long-chain fatty acid import into cells, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ACSL1 | Long-chain acyl-CoA synthetase; activates fatty acids for import and metabolism | Linked to increased fatty acid import during picornavirus replication |
| ACSL3 | Long-chain acyl-CoA synthetase; involved in lipid synthesis | Potential role in membrane synthesis for viral replication |
| ACSL4 | Long-chain acyl-CoA synthetase; contributes to lipid metabolism | May influence fatty acid import regulation |
| ACSL5 | Long-chain acyl-CoA synthetase; involved in fatty acid activation | Candidate for regulating import |
| ACSL6 | Long-chain acyl-CoA synthetase; brain-specific | Possible role in neuronal lipid import |
| MFSD2A | Lysophosphatidylcholine transporter; mediates DHA import | Essential for CD8+ memory T cell maintenance |
| CD36 | Fatty acid translocase; facilitates fatty acid uptake | Potential regulator of long-chain fatty acid import |
| FATP1 (SLC27A1) | Fatty acid transport protein; enhances fatty acid uptake | Candidate for positive regulation |
| FATP2 (SLC27A2) | Fatty acid transport protein; involved in lipid metabolism | May regulate import in specific tissues |
| FATP4 (SLC27A4) | Fatty acid transport protein; intestinal fatty acid uptake | Potential role in dietary lipid absorption |
| FABPpm | Plasma membrane fatty acid binding protein | Facilitates fatty acid transport |
| LPL | Lipoprotein lipase; releases fatty acids from lipoproteins | Indirectly increases fatty acid availability for import |
| PPARγ | Nuclear receptor; regulates lipid metabolism genes | May upregulate transport proteins |
| SREBP-1c | Transcription factor; controls lipogenic genes | Could enhance expression of import machinery |
| AMPK | Energy sensor; regulates lipid metabolism | May modulate import in response to energy status |
| mTORC1 | Growth signaling; promotes lipid synthesis | Potential regulator of fatty acid import |
| HIF-1α | Hypoxia-inducible factor; regulates lipid uptake | May increase import under hypoxia |
| CD8 | T cell co-receptor; marks memory T cells | Context for MFSD2A function in memory T cells |
How Is positive regulation of long-chain fatty acid import into cell Regulated?
The positive regulation of long-chain fatty acid import is controlled by multiple signaling pathways. For instance, during picornavirus infection, increased long-chain acyl-CoA synthetase activity and fatty acid import are linked to membrane synthesis for replication organelles, suggesting viral hijacking of cellular regulation. In CD8+ memory T cells, MFSD2A is essential for maintenance and secondary response, indicating that lipid import is regulated to support immune memory. Other potential regulators include AMPK, mTORC1, and transcription factors such as SREBP-1c and PPARγ, which respond to energy status and metabolic demands.
positive regulation of long-chain fatty acid import into cell and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ACSL1 | Picornavirus replication | Knockout cells infected with picornavirus |
| MFSD2A | Impaired CD8+ memory T cell maintenance | MFSD2A knockout mice |
| CD36 | Metabolic disorders, fatty acid uptake | Overexpression in cell lines |
| FATP4 | Intestinal lipid absorption disorders | Knockout zebrafish or mice |
| PPARγ | Insulin resistance, obesity | Point mutation knock-in mice |
Viral Infections
Positive regulation of long-chain fatty acid import is exploited by picornaviruses to build replication organelles. Increased long-chain acyl-CoA synthetase activity and fatty acid import are linked to membrane synthesis for picornavirus replication organelles. This suggests that inhibiting this process could be antiviral.
Immune Disorders
MFSD2A, a key transporter, is essential for CD8+ memory T cell maintenance and secondary response to infection. Dysregulation of lipid import may impair immune memory, leading to increased susceptibility to infections.
Metabolic Diseases
Altered long-chain fatty acid import contributes to obesity, insulin resistance, and fatty liver disease. Although specific genes are not detailed in the provided citations, the general role of lipid uptake in metabolic homeostasis is well recognized.
From positive regulation of long-chain fatty acid import into cell-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X positively regulate long-chain fatty acid import? | CRISPR knockout cell line |
| Does a specific mutation in gene X affect import? | Point mutation knock-in |
| Can tagging gene X reveal its localization during import? | Tagged knock-in (e.g., GFP) |
| Does overexpression of gene X increase import? | Overexpression cell line |
| Which genes are essential for import? | CRISPR library screening |
| What pathways are altered by import regulation? | Transcriptomics and bioinformatics |
How to Study the positive regulation of long-chain fatty acid import into cell Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout | Loss-of-function effects on import | Identify positive regulators |
| CRISPR knock-in | Tagged protein localization | Study transporter dynamics |
| Overexpression | Gain-of-function effects | Confirm sufficiency |
| Lipid uptake assay | Rate of fatty acid import | Quantify regulation |
| RNA-seq | Transcriptional changes | Pathway analysis |
| Proteomics | Protein abundance and modifications | Identify signaling changes |
| Bioinformatics | Integration of omics data | Predict regulatory networks |
CRISPR Knockout Screening
Genome-wide CRISPR knockout screens can identify genes whose loss reduces long-chain fatty acid import. This approach is powerful for discovering positive regulators.
Lipid Uptake Assays
Fluorescent or radioactive fatty acid analogs measure import rates in cells with genetic modifications. These assays directly quantify the positive regulation.
Transcriptomics and Proteomics
RNA-seq and mass spectrometry reveal changes in gene expression and protein abundance upon modulation of candidate regulators, providing mechanistic insights.
Imaging and Localization
Fluorescence microscopy of tagged transporters (e.g., GFP-MFSD2A) visualizes their trafficking and membrane localization during import.
How CRISPR Can Be Used to Study GO:0140214 positive regulation of long-chain fatty acid import into cell
Knockout
CRISPR knockout of candidate genes such as ACSL1 or MFSD2A can abolish long-chain fatty acid import, confirming their necessity. This is a primary approach to validate positive regulators.
Point Mutation
Introducing specific point mutations in transporters (e.g., MFSD2A) can dissect functional domains required for import regulation. This helps distinguish between transport and regulatory functions.
Knock-in
Knock-in of tagged versions (e.g., GFP) allows real-time tracking of transporter localization and dynamics during import. This reveals how positive regulation affects trafficking.
Overexpression
Overexpressing candidate genes like ACSL1 or MFSD2A can increase import rates, demonstrating sufficiency. This is useful for gain-of-function studies.
How EDITGENE Supports positive regulation of long-chain fatty acid import into cell Research
Researchers studying positive regulation of long-chain fatty acid import into cell-related genes often need to determine whether a candidate gene is causally involved in this process. EDITGENE provides comprehensive CRISPR services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of long-chain fatty acid import into cell research.
Frequently Asked Questions About positive regulation of long-chain fatty acid import into cell
What is GO:0140214?
GO:0140214 is the Gene Ontology term for positive regulation of long-chain fatty acid import into cell, describing processes that increase the uptake of long-chain fatty acids.
What genes are involved in positive regulation of long-chain fatty acid import?
Key genes include ACSL family members, MFSD2A, CD36, and FATP proteins, as shown in studies on viral replication and immune memory.
How is long-chain fatty acid import regulated?
It is regulated by signaling pathways that sense lipid demand, leading to activation or upregulation of transporters and enzymes like ACSL and MFSD2A.
Why is long-chain fatty acid import important for immunity?
MFSD2A-mediated import is essential for CD8+ memory T cell maintenance and secondary response to infection.
Can viruses exploit long-chain fatty acid import?
Yes, picornaviruses increase long-chain acyl-CoA synthetase activity and fatty acid import to build replication organelles.
What diseases are linked to dysregulated long-chain fatty acid import?
Viral infections, immune disorders, and metabolic diseases such as obesity and insulin resistance.
How can CRISPR help study this process?
CRISPR knockout, knock-in, and overexpression models allow functional dissection of genes regulating import.
What methods measure long-chain fatty acid import?
Lipid uptake assays with fluorescent or radioactive analogs, combined with genetic manipulation, are commonly used.
What is the role of MFSD2A in lipid import?
MFSD2A transports lysophosphatidylcholine and is essential for CD8+ memory T cell maintenance.
Where can I find CRISPR models for this pathway?
EDITGENE offers custom knockout, point mutation, knock-in, and overexpression services for genes in this pathway.
Conclusion
GO:0140214 positive regulation of long-chain fatty acid import into cell is a vital biological process with roles in viral replication and immune memory. Understanding its regulation through genes like ACSL family members and MFSD2A provides insights into disease mechanisms and potential therapeutic targets. CRISPR-based models are indispensable for dissecting these pathways, and EDITGENE provides comprehensive services to support such research.
References
- 1. Nchoutmboube JA et al.. 2013. Increased long chain acyl-Coa synthetase activity and fatty acid import is linked to membrane synthesis for development of picornavirus replication organelles.. PLoS Pathog 9(6):e1003401 PMID: 23762027
- 2. Piccirillo AR et al.. 2019. The Lysophosphatidylcholine Transporter MFSD2A Is Essential for CD8(+) Memory T Cell Maintenance and Secondary Response to Infection.. J Immunol 203(1):117-126 PMID: 31127034
