GO:0061045 negative regulation of wound healing: Regulatory Mechanisms, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0061045 (negative regulation of wound healing) describes any process that decreases the rate, frequency, or extent of tissue repair after injury.
• Negative regulation is essential to prevent excessive scarring, fibrosis, and pathological tissue remodeling during wound healing.
• Key molecular brakes include autophagy-related proteins (SQSTM1, MAP1LC3B), redox regulators (NFE2L2/Nrf2, SLC7A11), and microRNAs such as miR-155.
• Dysregulated negative regulation contributes to chronic non-healing wounds, diabetic ulcers, and hypertrophic scars.
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal dissection of negative regulators in wound healing.
• Understanding GO:0061045 informs therapeutic strategies for chronic wounds, which affect millions worldwide and impose a substantial economic burden.
Description
Wound healing is a complex biological process that restores tissue integrity after injury, involving coordinated hemostasis, inflammation, proliferation, and remodeling. However, this process must be tightly controlled because excessive or prolonged healing can lead to fibrosis, scarring, and impaired tissue function. The Gene Ontology term GO:0061045, negative regulation of wound healing, captures the molecular and cellular events that dampen or restrain the wound healing response. This term is critical for researchers studying tissue repair, as it provides a framework for identifying endogenous brakes that prevent pathological healing outcomes. The importance of negative regulation in wound healing is underscored by the global burden of chronic wounds, which affect millions of patients and cost healthcare systems billions of dollars annually. Conditions such as diabetic foot ulcers, venous leg ulcers, and pressure ulcers are characterized by impaired healing, often due to insufficient or dysregulated negative regulatory mechanisms. Conversely, excessive negative regulation can contribute to non-healing wounds, while loss of negative regulation can drive hypertrophic scarring and fibrosis. Thus, understanding the molecular players that execute GO:0061045 is essential for developing targeted therapies. Recent research has identified diverse mechanisms that negatively regulate wound healing, including autophagy-mediated degradation of signaling proteins, redox-sensitive pathways, catecholamine signaling, and microRNA-mediated gene silencing. These discoveries have been facilitated by advances in CRISPR gene editing, which allow precise manipulation of candidate genes in cellular and animal models. This article synthesizes current knowledge on GO:0061045, highlighting key genes, regulatory mechanisms, disease relevance, and research methodologies to guide future investigations.
negative regulation of wound healing At A Glance
| GO ID | GO:0061045 |
|---|---|
| GO term | negative regulation of wound healing |
| Ontology | biological_process |
| Synonym | none |
| Major function | Dampening the rate, frequency, or extent of tissue repair after injury to prevent pathological healing outcomes |
| Related processes | Autophagy, redox regulation, angiogenesis, inflammation resolution, extracellular matrix remodeling |
| Key regulators | SQSTM1, MAP1LC3B, NFE2L2, SLC7A11, miR-155, catecholamines |
| Disease relevance | Chronic wounds, diabetic ulcers, fibrosis, hypertrophic scarring |
| Research methods | CRISPR knockout/knock-in, RNA-seq, proteomics, imaging, functional assays |
What Is GO:0061045?
GO:0061045, negative regulation of wound healing, is defined as any process that decreases the rate, frequency, or extent of the series of events that restore integrity to a damaged tissue following an injury. In other words, it encompasses molecular, cellular, and systemic mechanisms that put the brakes on tissue repair, preventing excessive or uncontrolled healing responses.
Why Is negative regulation of wound healing Important in Cell Biology?
GO:0061045 is critically important because it governs the balance between effective tissue repair and pathological healing outcomes. Without proper negative regulation, wound healing can become excessive, leading to fibrosis, scarring, and impaired organ function. Conversely, excessive negative regulation contributes to chronic non-healing wounds, a major clinical challenge affecting millions of patients worldwide. Understanding the molecular mechanisms of negative regulation provides opportunities to develop targeted therapies that modulate healing responses, potentially improving outcomes for patients with diabetic ulcers, surgical wounds, and traumatic injuries.
• Prevents excessive scarring and fibrosis by restraining uncontrolled extracellular matrix deposition.
• Limits inflammation resolution to avoid chronic inflammatory states that impair healing.
• Regulates angiogenesis to ensure proper vascularization without pathological vessel overgrowth.
• Controls keratinocyte and fibroblast activation to balance tissue regeneration and repair.
• Modulates redox homeostasis through Nrf2 and SLC7A11 to protect against oxidative damage during healing.
• Influences microRNA networks, such as miR-155, that fine-tune gene expression during wound repair.
• Dysregulation is linked to diabetic foot ulcers, venous leg ulcers, and pressure ulcers.
• Provides therapeutic targets for improving chronic wound healing and reducing scar formation.
• Guides development of biomaterials and pharmacological agents that modulate healing.
• Enables precision medicine approaches using CRISPR-based gene editing to correct dysregulated healing.
What Happens During negative regulation of wound healing?
Autophagy-mediated dampening of healing signals
In simple terms: Cells use autophagy to break down proteins that would otherwise keep wound healing active, thus putting a brake on the process.
Autophagy is a cellular degradation pathway that can negatively regulate wound healing by removing key signaling proteins required for keratinocyte and fibroblast activation. For example, autophagic degradation of SQSTM1 (p62) enables fibroblast activation, but excessive autophagy can also limit healing by degrading factors essential for repair. Keratinocyte autophagy is required for activation of keratinocytes and fibroblasts, and its dysregulation can impair wound healing. Thus, autophagy acts as a double-edged sword in negative regulation, depending on context and cargo.
Redox regulation and Nrf2 signaling
In simple terms: Cells use antioxidant pathways to control oxidative stress, which can slow down healing if not properly balanced.
Redox-sensitive transcription factor NFE2L2 (Nrf2) plays a complex role in wound healing. Pharmacological activation of Nrf2 promotes wound healing in some contexts, but excessive Nrf2 activity can also negatively regulate healing by suppressing pro-inflammatory signals necessary for repair. The cystine/glutamate antiporter SLC7A11 (xCT) regulates redox balance and efferocytosis; targeting SLC7A11 improves efferocytosis by dendritic cells and wound healing in diabetes. These findings highlight that negative regulation of wound healing involves fine-tuning of redox pathways.
Catecholamine and neuroendocrine control
In simple terms: Stress hormones like catecholamines can slow down blood vessel growth in wounds, acting as a brake on healing.
Catecholamines, including epinephrine and norepinephrine, regulate angiogenesis in cutaneous wound healing. They can negatively regulate wound healing by suppressing endothelial cell proliferation and migration, thereby limiting new blood vessel formation. This neuroendocrine control represents a systemic mechanism that can delay healing under chronic stress conditions.
MicroRNA-mediated gene silencing
In simple terms: Small RNA molecules can turn down the expression of genes that promote healing, acting as molecular brakes.
MicroRNAs such as miR-155 negatively regulate wound healing by targeting transcripts involved in inflammation and tissue repair. In diabetic foot ulcers, negative pressure wound therapy promotes healing by down-regulating miR-155 expression in granulation tissue. This demonstrates that microRNA-mediated silencing is a key mechanism of negative regulation, and modulating these microRNAs can accelerate healing.
Efferocytosis and resolution of inflammation
In simple terms: Clearing dead cells helps resolve inflammation, but if this process is too slow or too fast, it can impair healing.
Efferocytosis, the clearance of apoptotic cells by phagocytes, is essential for resolving inflammation and promoting wound healing. Negative regulation of wound healing can occur when efferocytosis is impaired, leading to persistent inflammation and delayed repair. Targeting SLC7A11 improves efferocytosis by dendritic cells and accelerates wound healing in diabetes, indicating that enhancing this process can overcome negative regulatory blocks.
Key Genes Involved in GO:0061045 negative regulation of wound healing
The following genes and proteins have been experimentally implicated in negative regulation of wound healing, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SQSTM1 | Autophagy receptor; degradation modulates fibroblast activation | Knockout studies show impaired wound healing due to failed autophagy |
| MAP1LC3B | Autophagosome marker; required for keratinocyte autophagy | Essential for keratinocyte activation and wound repair |
| NFE2L2 | Redox-sensitive transcription factor; modulates oxidative stress | Pharmacological activation promotes healing, but overactivation can delay repair |
| SLC7A11 | Cystine/glutamate antiporter; regulates redox and efferocytosis | Targeting improves efferocytosis and diabetic wound healing |
| MIR155HG | Host gene for miR-155; microRNA-mediated silencing | Downregulation by negative pressure therapy promotes healing |
| ADRB2 | Beta-2 adrenergic receptor; mediates catecholamine effects | Regulates angiogenesis in cutaneous wound healing |
| VEGFA | Vascular endothelial growth factor; angiogenesis regulator | Negatively regulated by catecholamines, affecting wound vascularization |
| TGFB1 | Transforming growth factor beta; fibrosis and scarring | Excessive signaling contributes to pathological healing |
| COL1A1 | Type I collagen; extracellular matrix component | Overexpression leads to fibrosis; negative regulation prevents scarring |
| ACTA2 | Alpha-smooth muscle actin; myofibroblast marker | Myofibroblast persistence drives fibrosis; negative regulation promotes resolution |
| IL6 | Interleukin-6; pro-inflammatory cytokine | Persistent inflammation impairs healing; negative regulation resolves inflammation |
| TNF | Tumor necrosis factor; inflammation mediator | Excessive TNF delays healing; negative regulation limits inflammation |
| MMP9 | Matrix metalloproteinase 9; ECM remodeling | Overactivity degrades ECM; negative regulation balances remodeling |
| TIMP1 | Tissue inhibitor of metalloproteinases 1 | Inhibits MMPs; negative regulation of ECM degradation |
| HIF1A | Hypoxia-inducible factor 1 alpha; angiogenesis | Regulates vascularization; negative regulation prevents excessive angiogenesis |
| KEAP1 | Negative regulator of Nrf2; redox homeostasis | Modulates Nrf2 activity; affects healing outcomes |
| ATG5 | Autophagy-related 5; essential for autophagosome formation | Required for keratinocyte autophagy and wound healing |
How Is negative regulation of wound healing Regulated?
Negative regulation of wound healing is controlled at multiple levels, including transcriptional, post-transcriptional, and post-translational mechanisms. Autophagy-related proteins such as SQSTM1 and MAP1LC3B are regulated by nutrient-sensing pathways including mTOR, which can suppress autophagy and thereby modulate healing. Redox-sensitive transcription factor NFE2L2 (Nrf2) is controlled by KEAP1-mediated degradation, and its activity influences oxidative stress and healing outcomes. MicroRNAs such as miR-155 provide post-transcriptional control by targeting mRNAs involved in inflammation and repair. Additionally, catecholamines acting through adrenergic receptors regulate angiogenesis and can negatively impact healing. These regulatory layers ensure that wound healing proceeds at an appropriate pace and terminates when tissue integrity is restored.
negative regulation of wound healing and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SLC7A11 | Diabetic wound healing; efferocytosis impairment | Knockout mouse models of diabetes; dendritic cell-specific deletion |
| SQSTM1 | Impaired fibroblast activation; chronic wounds | Conditional knockout in fibroblasts; skin wound healing assays |
| MIR155HG | Diabetic foot ulcers; inflammation | miR-155 knockout mice; negative pressure wound therapy models |
| NFE2L2 | Oxidative stress; impaired healing | Nrf2 knockout and knock-in mice; pharmacological activation |
| ADRB2 | Stress-induced delayed healing; angiogenesis | Beta-2 adrenergic receptor knockout mice; cutaneous wound models |
Chronic wounds and diabetic ulcers
Chronic wounds, including diabetic foot ulcers, venous leg ulcers, and pressure ulcers, represent a major clinical burden and are characterized by impaired healing. Negative regulation of wound healing is often dysregulated in these conditions, with excessive or insufficient braking mechanisms contributing to non-healing. In diabetes, impaired efferocytosis and redox imbalance delay wound closure; targeting SLC7A11 improves efferocytosis by dendritic cells and accelerates healing in diabetic models. Negative pressure wound therapy promotes healing by down-regulating miR-155, highlighting the therapeutic potential of modulating negative regulators.
Fibrosis and hypertrophic scarring
Excessive wound healing can lead to fibrosis and hypertrophic scarring, which are driven by persistent myofibroblast activation and excessive extracellular matrix deposition. Negative regulation of wound healing is critical to prevent these outcomes; loss of negative regulators such as autophagy proteins or microRNAs can tip the balance toward fibrosis. Understanding GO:0061045 provides insights into therapeutic strategies that enhance negative regulation to limit scarring.
Impaired healing in aging and chronic stress
Aging and chronic stress are associated with delayed wound healing, partly due to altered catecholamine signaling and reduced angiogenesis. Catecholamines negatively regulate angiogenesis in cutaneous wound healing, and chronic stress can exacerbate this effect. Additionally, age-related declines in autophagy may impair keratinocyte and fibroblast activation, contributing to delayed repair. These findings underscore the importance of negative regulation in age-related healing impairments.
From negative regulation of wound healing-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of a candidate gene accelerate or delay wound healing? | CRISPR knockout in keratinocytes or fibroblasts; in vivo wound healing assays |
| Does a specific point mutation in a negative regulator alter its function? | CRISPR point mutation knock-in in cell lines; functional assays |
| Does overexpression of a negative regulator impair healing? | CRISPR overexpression (e.g., CRISPRa) in primary cells; scratch assays |
| Does tagging a protein reveal its dynamics during healing? | CRISPR knock-in of fluorescent tags; live imaging in wound models |
| Which genes are essential for autophagy-mediated negative regulation? | CRISPR library screening in keratinocytes; autophagy flux assays |
| Can modulating a microRNA improve diabetic wound healing? | miR-155 knockout or overexpression in diabetic mouse models |
How to Study the negative regulation of wound healing Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout screening | Loss-of-function effects on wound healing | Identify negative regulators in keratinocytes |
| RNA sequencing | Transcriptional changes during healing | Profile gene expression in wound tissue |
| Proteomics | Protein abundance and modifications | Detect autophagy-mediated degradation |
| Live-cell imaging | Dynamic protein localization and autophagy flux | Visualize MAP1LC3B puncta in keratinocytes |
| Scratch assay | Cell migration and wound closure in vitro | Assess keratinocyte and fibroblast activation |
| In vivo wound healing model | Rate of wound closure and scar formation | Validate candidate genes in mice |
| Immunoblotting | Protein expression and cleavage | Monitor SQSTM1 degradation |
| Flow cytometry | Efferocytosis and immune cell populations | Assess dendritic cell function in diabetes |
CRISPR-based functional genomics
CRISPR knockout, knock-in, and overexpression screens enable systematic identification of genes that negatively regulate wound healing. Pooled CRISPR libraries targeting autophagy-related genes, redox regulators, and microRNA host genes can be applied in keratinocyte or fibroblast models to uncover novel brakes on healing. These screens are complemented by single-cell RNA sequencing to resolve heterogeneity in healing responses.
Transcriptomic and proteomic profiling
RNA sequencing of wound tissue at different healing stages reveals dynamic changes in gene expression programs associated with negative regulation. Proteomic approaches, including mass spectrometry, can identify post-translational modifications and protein-protein interactions that modulate healing. For example, autophagic degradation of SQSTM1 can be monitored by immunoblotting and proteomics.
Imaging and functional assays
Live-cell imaging of fluorescently tagged proteins (e.g., MAP1LC3B) allows real-time visualization of autophagy during wound healing. Scratch assays and transwell migration assays measure keratinocyte and fibroblast activation, which are key readouts of negative regulation. In vivo wound healing models, including excisional and incisional wounds in mice, provide functional validation of candidate genes.
Pharmacological and genetic modulation
Small molecules that activate or inhibit Nrf2, autophagy, or adrenergic signaling can be used to probe negative regulation. Genetic tools such as conditional knockout mice and CRISPR interference (CRISPRi) enable precise temporal and spatial control of candidate genes. These approaches help establish causality and identify therapeutic targets.
How CRISPR Can Be Used to Study GO:0061045 negative regulation of wound healing
Knockout
CRISPR knockout of candidate negative regulators, such as SQSTM1 or ATG5, in keratinocytes or fibroblasts can reveal their essential roles in wound healing. For example, knockout of SQSTM1 impairs fibroblast activation and delays wound closure in mice. Knockout studies are foundational for establishing causality in GO:0061045 research.
Point Mutation
CRISPR point mutation knock-in allows precise modification of specific residues in negative regulators to test their functional relevance. For instance, mutating phosphorylation sites in SQSTM1 can determine whether specific post-translational modifications are required for its role in autophagy and wound healing. This approach provides mechanistic insights beyond simple knockout.
Knock-in
CRISPR knock-in of fluorescent tags (e.g., GFP) into endogenous loci enables real-time tracking of negative regulators during wound healing. Tagging MAP1LC3B allows visualization of autophagosome dynamics in live keratinocytes. Knock-in of reporter genes can also be used to monitor transcriptional activity of genes like NFE2L2.
Overexpression
CRISPR activation (CRISPRa) or traditional overexpression constructs can drive high-level expression of negative regulators to test whether they impair wound healing. Overexpression of miR-155 in diabetic wounds exacerbates healing impairment, while its inhibition improves healing. Overexpression models are useful for gain-of-function studies.
How EDITGENE Supports negative regulation of wound healing Research
Researchers studying negative regulation of wound healing-related genes often need to determine whether a candidate gene is causally involved in the healing process or merely correlated with it. EDITGENE provides comprehensive CRISPR-based services to accelerate this discovery, from knockout and point mutation to knock-in and overexpression models, as well as library screening and bioinformatics support.
Contact EDITGENE today to design your custom CRISPR model for negative regulation of wound healing research.
Frequently Asked Questions About negative regulation of wound healing
What is GO:0061045 negative regulation of wound healing?
GO:0061045 is a Gene Ontology biological process term defined as any process that decreases the rate, frequency, or extent of the series of events that restore integrity to a damaged tissue following an injury.
What genes are involved in negative regulation of wound healing?
Key genes include SQSTM1, MAP1LC3B, ATG5, NFE2L2, SLC7A11, MIR155HG, and ADRB2, which regulate autophagy, redox balance, microRNA silencing, and catecholamine signaling.
How does autophagy negatively regulate wound healing?
Autophagy degrades signaling proteins required for keratinocyte and fibroblast activation, thereby dampening the healing response; however, basal autophagy is also needed for activation, so the effect is context-dependent.
What is the role of miR-155 in wound healing?
miR-155 negatively regulates wound healing by silencing genes involved in inflammation and repair; down-regulating miR-155 with negative pressure wound therapy promotes healing in diabetic foot ulcers.
How does Nrf2 affect wound healing?
Nrf2 activation can promote healing by reducing oxidative stress, but excessive Nrf2 activity may negatively regulate healing by suppressing necessary inflammatory signals.
What diseases are associated with dysregulated negative regulation of wound healing?
Chronic wounds, diabetic foot ulcers, venous leg ulcers, pressure ulcers, fibrosis, and hypertrophic scarring are associated with dysregulated negative regulation of wound healing.
What research methods are used to study negative regulation of wound healing?
CRISPR knockout/knock-in, RNA-seq, proteomics, live-cell imaging, scratch assays, and in vivo wound healing models are commonly used.
How can CRISPR help identify negative regulators of wound healing?
CRISPR knockout and activation screens enable systematic loss- and gain-of-function studies to identify genes that dampen wound healing, followed by functional validation in cell and animal models.
What is the clinical significance of negative regulation of wound healing?
Understanding negative regulation can lead to therapies that accelerate chronic wound healing or prevent excessive scarring, addressing a major unmet clinical need.
Which cell types are most relevant for studying GO:0061045?
Keratinocytes, fibroblasts, endothelial cells, and immune cells such as dendritic cells and macrophages are key cell types involved in negative regulation of wound healing.
Conclusion
GO:0061045, negative regulation of wound healing, encompasses diverse molecular mechanisms that restrain tissue repair to prevent pathological outcomes. Key regulators include autophagy proteins, redox-sensitive factors, microRNAs, and catecholamines, which collectively fine-tune the healing response. Dysregulation of these processes contributes to chronic wounds, fibrosis, and impaired healing in diabetes and aging. Continued research using CRISPR-based models and multi-omics approaches will further elucidate these mechanisms and identify therapeutic targets. EDITGENE provides comprehensive CRISPR services, including knockout, point mutation, knock-in, overexpression, library screening, and bioinformatics, to support researchers investigating negative regulation of wound healing. By leveraging these tools, the field can accelerate the translation of mechanistic insights into clinical solutions for wound care.
References
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