GO:0090303 positive regulation of wound healing: Signaling Pathways, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0090303 (positive regulation of wound healing) describes any process that increases the rate, frequency, or extent of tissue repair after injury, as defined by QuickGO.
• Key drivers include immune cell modulation (macrophages, T cells), angiogenesis, fibroblast activation, and growth factor signaling such as TGF-beta and KGF [1,2,3,4].
• Exosomes and microRNAs, such as miR-21-3p, can accelerate wound healing by promoting angiogenesis and fibroblast function.
• Natural compounds like bee venom and flavonoids positively regulate wound healing through anti-inflammatory and pro-regenerative mechanisms [6,7].
• Low-dose photodynamic therapy with aminolevulinic acid enhances skin rejuvenation and wound healing, representing a clinical positive regulator.
• CRISPR-based models (knockout, knock-in, overexpression) are essential to dissect causal roles of specific genes in positive regulation of wound healing.
Description
Positive regulation of wound healing (GO:0090303) is a biological process that encompasses any molecular or cellular event that increases the rate, frequency, or extent of restoring tissue integrity after injury. This term is critical for understanding how the body coordinates complex responses involving immune cells, endothelial cells, fibroblasts, and keratinocytes to achieve repair [1,3]. Dysregulation of these positive regulatory mechanisms can lead to chronic wounds, excessive scarring, or impaired tissue regeneration, making this GO term a focal point for therapeutic development [4,8]. Researchers study positive regulation of wound healing to identify molecular targets that can be manipulated to enhance repair in conditions such as diabetic ulcers, burns, and surgical wounds [1,2]. Recent advances highlight the roles of immunomodulatory hydrogels, exosomal microRNAs, and cytokine networks in driving pro-regenerative responses [1,2,3]. Understanding the genetic and signaling components that positively regulate wound healing is essential for developing new interventions that improve patient outcomes [4,5].
positive regulation of wound healing At A Glance
| GO ID | GO:0090303 |
|---|---|
| GO term | positive regulation of wound healing |
| Ontology | biological_process |
| Synonym | none |
| Major function | Enhances the rate, frequency, or extent of tissue repair after injury |
| Related processes | Immune response, angiogenesis, fibroblast proliferation, extracellular matrix remodeling |
| Key regulators | Cytokines (TGF-beta, KGF), microRNAs (miR-21-3p), immune cells (macrophages, T cells) |
| Therapeutic relevance | Chronic wounds, scarless healing, skin rejuvenation |
What Is GO:0090303?
According to the Gene Ontology, positive regulation of wound healing (GO:0090303) refers to any process that increases the rate, frequency, or extent of the series of events that restore integrity to a damaged tissue following an injury. In other words, it covers all molecular, cellular, and systemic mechanisms that actively promote and accelerate tissue repair, rather than merely being part of the healing process itself.
Why Is positive regulation of wound healing Important in Cell Biology?
Positive regulation of wound healing is fundamental to recovery from tissue injury, and its manipulation holds promise for treating chronic wounds, reducing scarring, and promoting regeneration. Many pathological conditions, including diabetes, vascular disease, and aging, impair wound healing, and enhancing positive regulatory pathways can reverse these deficits [1,4,8]. Moreover, understanding how specific genes and signaling molecules positively regulate healing can lead to targeted therapies that accelerate repair and improve quality of life [2,3,7].
• Chronic wounds affect millions worldwide, and positive regulators can accelerate closure.
• Exosomal miR-21-3p from umbilical cord blood enhances angiogenesis and fibroblast function, representing a positive regulatory mechanism.
• T helper 17 (TH17) cells and their cytokines regulate wound healing and tissue regeneration, with implications for carcinogenesis.
• TGF-beta, KGF-1, and KGF-2 are key positive regulators that promote scarless wound healing.
• Lymphangiogenesis is positively regulated by cytokines, contributing to wound resolution.
• Bee venom and its components positively influence wound healing through anti-inflammatory and antimicrobial actions.
• Flavonoids from plants positively regulate wound healing via multiple mechanisms including antioxidant and anti-inflammatory effects.
• Low-dose photodynamic therapy with aminolevulinic acid positively regulates skin rejuvenation and wound healing.
• Positive regulation of wound healing is critical for preventing infection and restoring barrier function [1,6].
• Targeting positive regulators can reduce scar formation and promote tissue regeneration [4,8].
What Happens During positive regulation of wound healing?
Immune Cell Modulation and Inflammation Resolution
In simple terms: Immune cells such as macrophages and T cells are directed to promote healing rather than prolong inflammation.
Positive regulation of wound healing often begins with the modulation of immune cells. Immunomodulatory hydrogels can orchestrate a pro-regenerative response of macrophages and enhance angiogenesis, thereby accelerating chronic wound healing. T helper 17 (TH17) cells and their associated cytokines play a regulatory role in wound healing and tissue regeneration, and their balance influences the outcome of repair. These immune cells release cytokines that recruit fibroblasts and endothelial cells, promoting a transition from inflammation to proliferation [1,3].
Angiogenesis and Vascularization
In simple terms: New blood vessels are formed to deliver oxygen and nutrients to the healing tissue.
Angiogenesis is a critical component of positive regulation of wound healing. Exosomes from human umbilical cord blood accelerate cutaneous wound healing through miR-21-3p-mediated promotion of angiogenesis and fibroblast function. Cytokines that regulate lymphangiogenesis also contribute to wound resolution by facilitating fluid clearance and immune cell trafficking. Enhanced angiogenesis ensures adequate perfusion and supports the metabolic demands of regenerating tissue [1,2].
Fibroblast Activation and Extracellular Matrix Remodeling
In simple terms: Fibroblasts produce collagen and other matrix components to rebuild the tissue structure.
Fibroblasts are key effector cells in positive regulation of wound healing. They migrate to the wound site, proliferate, and synthesize extracellular matrix proteins. Exosomal miR-21-3p promotes fibroblast function, enhancing matrix deposition and wound closure. Growth factors such as TGF-beta, KGF-1, and KGF-2 positively regulate fibroblast activity and contribute to scarless healing. Proper remodeling of the extracellular matrix is essential for restoring tissue integrity [4,7].
Growth Factor and Cytokine Signaling
In simple terms: Signaling molecules act as instructions that tell cells to grow, migrate, and repair.
Positive regulation of wound healing is driven by a network of growth factors and cytokines. TGF-beta, KGF-1, and KGF-2 are central regulators that promote re-epithelialization, angiogenesis, and matrix deposition. Cytokines regulating lymphangiogenesis also influence wound healing. Additionally, TH17-associated cytokines modulate the inflammatory milieu and affect tissue regeneration. These signaling molecules coordinate the behavior of multiple cell types to ensure efficient repair [3,4,5].
Exosomal and MicroRNA-Mediated Regulation
In simple terms: Tiny vesicles and small RNA molecules can transfer pro-healing signals between cells.
Exosomes and microRNAs are emerging as important positive regulators of wound healing. Exosomes from human umbilical cord blood accelerate cutaneous wound healing through miR-21-3p-mediated promotion of angiogenesis and fibroblast function. These vesicles can deliver miRNAs to recipient cells, altering gene expression to favor repair. This mechanism represents a novel avenue for therapeutic intervention.
Pharmacological and Physical Modulation
In simple terms: Natural compounds and light-based therapies can boost the healing process.
Various exogenous agents positively regulate wound healing. Bee venom and its components exhibit wound healing properties through anti-inflammatory and antimicrobial mechanisms. Flavonoids, a class of plant polyphenols, promote wound healing via antioxidant, anti-inflammatory, and pro-angiogenic actions. Low-dose photodynamic therapy with aminolevulinic acid or its methyl ester enhances skin rejuvenation and wound healing, likely by stimulating cellular responses. These interventions highlight the diverse ways to positively regulate healing [6,7,8].
Key Genes Involved in GO:0090303 positive regulation of wound healing
The following genes and proteins are key players in positive regulation of wound healing, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| TGFB1 | Promotes fibroblast proliferation, collagen deposition, and scarless healing | Target for modulating scar formation |
| FGF7 (KGF-1) | Stimulates keratinocyte proliferation and re-epithelialization | Therapeutic candidate for wound repair |
| FGF10 (KGF-2) | Enhances epithelialization and granulation tissue formation | Potential agent for chronic wounds |
| MIR21 | miR-21-3p promotes angiogenesis and fibroblast function | Exosomal delivery for wound healing |
| IL17A | TH17 cytokine that regulates inflammation and tissue regeneration | Modulating TH17 responses in healing |
| VEGFA | Key angiogenic factor induced during wound healing | Target for promoting vascularization [1,2] |
| CXCL12 | Chemokine that recruits progenitor cells to wound site | Enhances stem cell-mediated repair |
| MMP9 | Matrix metalloproteinase involved in matrix remodeling | Balance needed for proper healing |
| COL1A1 | Major collagen component of extracellular matrix | Marker of fibroblast activity |
| ACTA2 | Alpha-smooth muscle actin, marker of myofibroblasts | Contractile force for wound closure |
| HIF1A | Hypoxia-inducible factor, promotes angiogenesis | Adaptation to hypoxic wound environment |
| STAT3 | Transcription factor downstream of cytokines, promotes cell migration | Regulates multiple healing pathways |
| NFKB1 | Inflammatory transcription factor, modulates immune response | Balancing inflammation and repair |
| PTGS2 (COX-2) | Prostaglandin synthesis, involved in inflammation | Target of anti-inflammatory compounds |
| NFE2L2 (NRF2) | Antioxidant response regulator | Protects against oxidative stress in wounds |
| TLR4 | Innate immune receptor, senses damage signals | Initiates inflammatory phase |
| CD68 | Macrophage marker, indicates phagocytic activity | Assessing macrophage infiltration |
| PECAM1 (CD31) | Endothelial cell marker, indicates angiogenesis | Quantifying vessel density |
How Is positive regulation of wound healing Regulated?
Positive regulation of wound healing is itself subject to multiple layers of regulation. Cytokines such as TGF-beta and KGFs control the balance between fibrosis and regeneration. Immune cells, particularly macrophages and TH17 cells, regulate the transition from inflammation to proliferation [1,3]. MicroRNAs like miR-21-3p modulate gene expression post-transcriptionally to enhance angiogenesis and fibroblast function. Additionally, pharmacological agents such as bee venom, flavonoids, and photodynamic therapy can upregulate pro-healing pathways [6,7,8]. These regulatory mechanisms ensure that healing progresses efficiently while preventing excessive scarring or chronicity [4,8].
positive regulation of wound healing and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| TGFB1 | Fibrosis and hypertrophic scarring | Knockout or conditional overexpression in fibroblasts |
| MIR21 | Chronic wounds and impaired angiogenesis | Knockout or overexpression in keratinocytes or exosomes |
| IL17A | Inflammatory skin diseases and cancer | Knockout mice or TH17 cell-specific deletion |
| VEGFA | Diabetic ulcers and ischemia | Inducible knockout or knock-in of angiogenic variants |
| FGF7 | Delayed wound healing | Overexpression in keratinocytes or topical application |
Chronic Wounds and Diabetic Ulcers
Impaired positive regulation of wound healing contributes to chronic wounds, such as diabetic foot ulcers and pressure sores. Immunomodulatory hydrogels that orchestrate pro-regenerative macrophages and angiogenesis have shown promise in treating chronic wounds. Exosomal miR-21-3p from umbilical cord blood accelerates healing in cutaneous wounds, suggesting a therapeutic strategy for non-healing wounds. Enhancing positive regulatory pathways could overcome the stalled healing seen in diabetes and vascular disease [1,2].
Hypertrophic Scars and Fibrosis
Excessive positive regulation can lead to hypertrophic scars and fibrosis. TGF-beta, while essential for healing, can drive fibrosis when overactive. Understanding the balance between positive regulation and scar formation is critical for developing therapies that promote regeneration without excessive scarring. KGF-1 and KGF-2 have been explored for their ability to promote scarless healing.
Wound Healing in Cancer and Carcinogenesis
TH17 cells and associated cytokines are involved in both wound healing and carcinogenesis, highlighting a link between regenerative processes and cancer. Chronic inflammation and persistent activation of healing pathways can create a microenvironment conducive to tumor growth. Therefore, targeting positive regulators of wound healing must consider potential oncogenic risks.
Skin Aging and Rejuvenation
Positive regulation of wound healing overlaps with skin rejuvenation. Low-dose photodynamic therapy with aminolevulinic acid or its methyl ester has positive effects on skin rejuvenation and wound healing, indicating that similar mechanisms can improve skin quality. Flavonoids and bee venom also show potential in promoting skin repair and regeneration [6,7].
From positive regulation of wound healing-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X positively regulate wound healing? | Knockout mouse model with wound healing assays |
| Does a specific point mutation in gene Y alter healing rate? | Point-mutation knock-in mouse or cell line |
| Can overexpression of gene Z accelerate wound closure? | Overexpression cell lines or transgenic mice |
| What is the role of a tagged protein in healing? | Tagged knock-in for imaging and co-IP |
| Which genes are essential for macrophage-mediated repair? | CRISPR library screening in macrophages |
| How does a non-coding RNA regulate healing? | Knockout or overexpression of miRNA in exosomes |
How to Study the positive regulation of wound healing Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Excisional wound model | Rate of wound closure | In vivo testing of pro-healing agents |
| Scratch assay | Cell migration | In vitro assessment of fibroblast/keratinocyte motility |
| Tube formation assay | Angiogenesis | Endothelial cell function [1,2] |
| Immunohistochemistry | Protein localization and abundance | Tissue analysis of CD68, PECAM1 |
| Western blot | Protein expression and phosphorylation | Signaling pathway activation [3,4] |
| qRT-PCR | mRNA expression | Gene expression profiling [2,7] |
| Small RNA sequencing | miRNA profiling | Exosome cargo analysis |
| CRISPR screening | Gene function at scale | Identifying novel regulators |
In Vivo Wound Healing Models
Animal models, typically mice or rats, are used to assess positive regulation of wound healing. Full-thickness excisional wounds are created, and closure is monitored over time. Histological analysis evaluates re-epithelialization, granulation tissue, and angiogenesis [1,2]. Immunohistochemistry for markers like CD68 and PECAM1 quantifies macrophage infiltration and vessel density [1,2].
In Vitro Cell Migration and Proliferation Assays
Scratch wound assays and transwell migration assays measure the ability of fibroblasts, keratinocytes, or endothelial cells to migrate. Proliferation is assessed by EdU or MTT assays. These methods are used to study the effects of specific genes or treatments on cell behavior relevant to wound healing [2,4].
Molecular Analysis of Signaling Pathways
Western blotting, qPCR, and RNA-seq are used to measure expression of growth factors, cytokines, and matrix proteins. Phosphorylation of signaling intermediates (e.g., SMAD, STAT3) indicates pathway activation. These techniques help delineate the molecular mechanisms of positive regulation [3,4,7].
Exosome and MicroRNA Profiling
Exosomes are isolated from conditioned media or body fluids, characterized by NTA and Western blot for CD9/CD63, and their miRNA cargo is profiled by small RNA sequencing. Functional studies involve treating cells with exosomes and assessing angiogenesis or migration.
How CRISPR Can Be Used to Study GO:0090303 positive regulation of wound healing
Knockout
CRISPR knockout is used to delete candidate genes in cell lines or animal models to determine whether they are required for positive regulation of wound healing. For example, knocking out MIR21 or TGFB1 can reveal their essential roles in angiogenesis and fibrosis [2,4]. Knockout models help establish causality and identify loss-of-function phenotypes.
Point Mutation
Point mutations can be introduced to mimic disease-associated variants or to dissect specific phosphorylation sites. For instance, mutating a phosphorylation site in STAT3 can test its role in cytokine signaling during healing. Point-mutation knock-in models provide precise insights into molecular mechanisms.
Knock-in
Knock-in of reporter genes or tags (e.g., GFP, luciferase) allows visualization and tracking of cells expressing genes of interest. Tagged knock-in of COL1A1 or ACTA2 can monitor fibroblast activation in real time. Knock-in of human disease variants can model impaired healing.
Overexpression
Overexpression of pro-healing genes such as VEGFA or FGF7 can accelerate wound closure in preclinical models [1,4]. CRISPR activation (CRISPRa) enables targeted overexpression without genomic integration. This approach is useful for gain-of-function studies and therapeutic development.
How EDITGENE Supports positive regulation of wound healing Research
Researchers studying positive regulation of wound healing-related genes often need to determine whether a candidate gene is causally involved in accelerating tissue repair. EDITGENE provides comprehensive CRISPR-based services to create knockout, point-mutation, knock-in, and overexpression cell models, as well as CRISPR library screening and bioinformatics support, enabling precise functional dissection of wound healing pathways.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of wound healing research.
Frequently Asked Questions About positive regulation of wound healing
What is GO:0090303 positive regulation of wound healing?
GO:0090303 is a Gene Ontology biological process term defined as any process that increases 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 positive regulation of wound healing?
Key genes include TGFB1, FGF7, FGF10, MIR21, IL17A, VEGFA, and many others involved in immune modulation, angiogenesis, and matrix remodeling [2,3,4].
How does miR-21-3p promote wound healing?
Exosomal miR-21-3p from human umbilical cord blood accelerates cutaneous wound healing by promoting angiogenesis and fibroblast function.
What is the role of TGF-beta in wound healing?
TGF-beta positively regulates wound healing by promoting fibroblast proliferation, collagen deposition, and scarless healing, but overactivity can lead to fibrosis.
Can bee venom help wound healing?
Bee venom and its components have wound healing properties through anti-inflammatory and antimicrobial mechanisms.
What are flavonoids and how do they affect wound healing?
Flavonoids are plant compounds that positively regulate wound healing via antioxidant, anti-inflammatory, and pro-angiogenic actions.
How is photodynamic therapy used in wound healing?
Low-dose photodynamic therapy with aminolevulinic acid or its methyl ester positively affects skin rejuvenation and wound healing.
What immune cells regulate wound healing?
Macrophages and T helper 17 (TH17) cells are key regulators; immunomodulatory hydrogels can orchestrate pro-regenerative macrophage responses [1,3].
What research methods are used to study positive regulation of wound healing?
Common methods include in vivo excisional wound models, in vitro scratch assays, immunohistochemistry, Western blot, qPCR, and exosome profiling [1,2,4].
How can CRISPR be used to study wound healing genes?
CRISPR knockout, point mutation, knock-in, and overexpression models allow causal testing of specific genes in wound healing pathways [2,3,4].
Conclusion
Positive regulation of wound healing (GO:0090303) is a vital biological process that coordinates immune, vascular, and stromal cell functions to restore tissue integrity. Understanding its molecular drivers, from growth factors and microRNAs to immune cell modulation, offers opportunities to develop therapies for chronic wounds, scarring, and skin rejuvenation [1,2,4,8]. CRISPR-based models and screening approaches are indispensable for dissecting these mechanisms and identifying new therapeutic targets [3,4].
References
- 1. Kuan CH et al.. 2025. Immunomodulatory hydrogel orchestrates pro-regenerative response of macrophages and angiogenesis for chronic wound healing.. Biomaterials 314:122848 PMID: 39342917
- 2. Hu Y et al.. 2018. Exosomes from human umbilical cord blood accelerate cutaneous wound healing through miR-21-3p-mediated promotion of angiogenesis and fibroblast function.. Theranostics 8(1):169-184 PMID: 29290800
- 3. Brockmann L et al.. 2017. Regulation of T(H)17 Cells and Associated Cytokines in Wound Healing, Tissue Regeneration, and Carcinogenesis.. Int J Mol Sci 18(5) PMID: 28492497
- 4. Xiaojie W et al.. 2022. Scarless wound healing: Current insights from the perspectives of TGF-β, KGF-1, and KGF-2.. Cytokine Growth Factor Rev 66:26-37 PMID: 35690568
- 5. Sáinz-Jaspeado M et al.. 2018. Cytokines regulating lymphangiogenesis.. Curr Opin Immunol 53:58-63 PMID: 29680577
- 6. Kurek-Górecka A et al.. 2020. Bee Venom in Wound Healing.. Molecules 26(1) PMID: 33396220
- 7. Carvalho MTB et al.. 2021. Wound healing properties of flavonoids: A systematic review highlighting the mechanisms of action.. Phytomedicine 90:153636 PMID: 34333340
- 8. Zhang Y et al.. 2023. Positive effects of low-dose photodynamic therapy with aminolevulinic acid or its methyl ester in skin rejuvenation and wound healing: An update.. J Biophotonics 16(4):e202200293 PMID: 36602479
