GO:1905710 positive regulation of membrane permeability: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1905710 (positive regulation of membrane permeability) is a biological process that increases the passage or uptake of molecules across a membrane [1, 2, 4].
• It is essential for nutrient uptake, drug resistance, immune surveillance, and mitochondrial apoptosis [2, 6, 7].
• Key molecular players include tight junction proteins (claudins), VDAC1, TRP channels, and bacterial outer membrane porins [1, 3, 6, 8].
• Dysregulation contributes to cancer, inflammatory bowel disease, skin barrier defects, and antibiotic resistance [1, 4, 5, 8].
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal dissection of permeability regulators [1, 7, 8].
• EDITGENE provides end-to-end CRISPR services to study and target membrane permeability pathways.
Description
Membrane permeability is a fundamental property of all cells, controlling the exchange of ions, nutrients, and signaling molecules with the environment. The Gene Ontology term GO:1905710, positive regulation of membrane permeability, describes any process that activates or increases the frequency, rate, or extent of the passage or uptake of molecules by a membrane [1, 2, 4]. This process is critical for normal physiology, from intestinal nutrient absorption to mitochondrial apoptosis, and its dysregulation underlies numerous diseases [4, 6, 7]. Understanding how membrane permeability is positively regulated requires identifying the specific channels, transporters, and junctional complexes involved, as well as the signals that modulate their activity [3, 5, 8]. Recent advances in CRISPR gene editing and functional genomics have made it possible to systematically perturb these regulators and measure their effects on permeability, offering new therapeutic opportunities [1, 7, 8].
positive regulation of membrane permeability At A Glance
| GO ID | GO:1905710 |
|---|---|
| GO term | positive regulation of membrane permeability |
| Ontology | biological_process |
| Synonym | none |
| Major function | Increases the passage or uptake of molecules across a membrane |
| Related processes | Transport, membrane organization, response to stimuli |
| Key regulators | Claudins, VDAC1, TRP channels, bacterial porins |
| Disease relevance | Cancer, inflammatory bowel disease, skin barrier defects, antibiotic resistance |
What Is GO:1905710?
According to the Gene Ontology, GO:1905710 is defined as any process that activates or increases the frequency, rate or extent of the passage or uptake of molecules by a membrane. In other words, it encompasses the molecular events and regulatory inputs that enhance the movement of substances across biological membranes, whether through direct channel opening, increased transporter activity, or modulation of membrane barrier integrity [1, 2, 4].
Why Is positive regulation of membrane permeability Important in Cell Biology?
Positive regulation of membrane permeability is central to both normal physiology and disease. It governs the absorption of nutrients in the gut, the initiation of apoptosis via mitochondrial outer membrane permeabilization, and the efficacy of antibiotics against Gram-negative bacteria [4, 6, 8]. In cancer, increased permeability can enhance drug uptake but also promote metastasis, while in inflammatory diseases, barrier dysfunction leads to chronic inflammation [1, 4, 5]. Understanding the mechanisms that positively regulate permeability is therefore essential for developing targeted therapies, from monoclonal antibodies like zolbetuximab that target claudin-18.2 to small molecules that modulate mitochondrial channels [1, 7].
• Controls nutrient and drug uptake across cellular membranes [2, 4].
• Regulates mitochondrial outer membrane permeabilization during apoptosis [6, 7].
• Modulates tight junction barrier function in epithelia.
• Influences antibiotic resistance in Gram-negative bacteria [2, 8].
• Plays a role in skin barrier homeostasis and repair.
• Affects immune cell function and inflammation.
• Is a target for cancer therapy, e.g., claudin-18.2 antibodies.
• Involved in phototransduction via TRP channels.
• Dysregulated in neurodegenerative conditions linked to mitochondrial dysfunction.
• Provides a basis for CRISPR-based functional screens to identify new regulators [1, 7, 8].
What Happens During positive regulation of membrane permeability?
Initiation by extracellular or intracellular signals
In simple terms: A signal tells the cell to open its gates.
Positive regulation of membrane permeability often begins with a stimulus such as a ligand binding to a receptor, a change in membrane potential, or cellular stress. For example, in intestinal epithelial cells, dietary components and bacterial metabolites can signal through tight junction proteins to increase paracellular permeability. In mitochondria, apoptotic signals cause BAX/BAK activation, leading to VDAC1-dependent permeabilization.
Activation of channel or transporter proteins
In simple terms: Specific proteins in the membrane open up to let molecules through.
Once a signal is received, channel proteins such as TRP channels or porins undergo conformational changes that allow ions or small molecules to pass. Photosensitive TRP channels, for instance, open in response to light, increasing cation permeability. In bacteria, mutations that increase outer membrane permeability can overcome iron deficiency by allowing more siderophores to enter.
Modulation of tight junction complexes
In simple terms: The seals between cells loosen to let molecules pass between them.
In epithelial and endothelial tissues, tight junctions form a barrier that can be dynamically regulated. Claudins, such as claudin-18.2, are key components; their expression levels and post-translational modifications can increase paracellular permeability [1, 4]. This regulation is critical for nutrient absorption and is often disrupted in inflammatory bowel disease.
Mitochondrial outer membrane permeabilization
In simple terms: The mitochondria's outer shell becomes leaky, triggering cell death.
During apoptosis, the mitochondrial outer membrane undergoes permeabilization, allowing cytochrome c release. VDAC1, a channel in the outer membrane, is regulated by interactions with BAX and other proteins [6, 7]. Alpha7 nicotinic acetylcholine receptors can displace from VDAC1 complexes to form complexes with BAX, promoting permeability.
Feedback and termination
In simple terms: The cell closes the gates again once the signal is gone.
Positive regulation is often transient, with feedback mechanisms restoring baseline permeability. For example, in skin barrier homeostasis, lipid processing and ion gradients are tightly regulated to repair damage. In bacteria, efflux pump expression can counteract increased permeability to antibiotics.
Key Genes Involved in GO:1905710 positive regulation of membrane permeability
The following genes and proteins are central to the positive regulation of membrane permeability, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CLDN18 | Tight junction protein; claudin-18.2 isoform increases paracellular permeability | Target of zolbetuximab in gastric cancer |
| VDAC1 | Mitochondrial outer membrane channel; regulates metabolite flux and apoptosis | Key player in mitochondrial permeabilization [6, 7] |
| BAX | Pro-apoptotic BCL-2 family member; forms pores in mitochondrial membrane | Interacts with VDAC1 to increase permeability |
| TRPC1 | TRP channel; mediates cation influx | Photosensitive TRP channels regulate permeability |
| TRPV1 | TRP channel; responds to capsaicin and heat | Involved in sensory transduction and permeability |
| OCLN | Occludin; tight junction component | Regulates paracellular permeability in epithelia |
| TJP1 | Zonula occludens-1; scaffolding protein at tight junctions | Modulates barrier function |
| CLDN1 | Claudin-1; tight junction protein | Skin barrier and intestinal permeability [4, 5] |
| CLDN2 | Claudin-2; forms cation-selective pores | Increases paracellular permeability in inflammation |
| TONB | Bacterial inner membrane protein; energizes outer membrane transport | Mutations affect outer membrane permeability |
| OMPF | Outer membrane porin in E. coli | Allows passive diffusion of small molecules |
| OMPC | Outer membrane porin in E. coli | Regulates permeability to antibiotics |
| AQP3 | Aquaporin-3; water and glycerol transport | Skin barrier homeostasis |
| AQP4 | Aquaporin-4; water channel in brain | Potential role in cerebral edema |
| ATP1A1 | Na+/K+-ATPase; maintains ion gradients | Indirectly regulates membrane permeability |
| CFTR | Chloride channel; regulates epithelial fluid transport | Mutations cause cystic fibrosis |
| SLC26A3 | Chloride/bicarbonate exchanger | Intestinal permeability and absorption |
| MDR1 | Multidrug efflux pump; reduces intracellular drug accumulation | Counteracts increased permeability |
How Is positive regulation of membrane permeability Regulated?
Positive regulation of membrane permeability is controlled at multiple levels. Transcriptional regulation of claudins and occludin by cytokines such as TNF-alpha and IFN-gamma can increase tight junction permeability. Post-translational modifications, including phosphorylation of tight junction proteins, rapidly modulate barrier function. In mitochondria, BCL-2 family proteins integrate apoptotic signals to regulate VDAC1-dependent permeabilization [6, 7]. Bacterial two-component systems sense environmental changes and alter porin expression to control outer membrane permeability. Additionally, lipid composition and membrane fluidity influence the activity of embedded channels and transporters.
positive regulation of membrane permeability and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CLDN18 | Gastric cancer | Knockout of CLDN18 in gastric cancer cell lines; overexpression for drug testing |
| VDAC1 | Apoptosis dysregulation, cancer | Point mutation of VDAC1 to block apoptosis; knockout in HeLa cells [6, 7] |
| CLDN2 | Inflammatory bowel disease | Knock-in of CLDN2 in intestinal epithelial cells; knockout in mice |
| AQP3 | Skin barrier defects | Knockout in keratinocytes; overexpression in skin equivalents |
| TONB | Antibiotic resistance | Knockout in E. coli; complementation with mutant tonB |
Cancer
Increased membrane permeability can enhance drug uptake but also promote metastasis. Claudin-18.2 is overexpressed in gastric and gastroesophageal junction cancers, and the monoclonal antibody zolbetuximab targets it to induce antibody-dependent cellular cytotoxicity. VDAC1-mediated mitochondrial permeabilization is a key step in apoptosis, and its dysregulation contributes to chemoresistance [6, 7].
Inflammatory bowel disease
Disrupted tight junction permeability leads to increased intestinal permeability ('leaky gut'), a hallmark of inflammatory bowel disease. Bacterial and dietary factors can upregulate claudin-2, increasing paracellular flux and inflammation.
Skin barrier defects
The skin permeability barrier is essential for preventing water loss and microbial invasion. Defects in lipid processing and aquaporin function contribute to conditions like atopic dermatitis and psoriasis.
Antibiotic resistance
Gram-negative bacteria regulate outer membrane permeability to limit antibiotic entry. Mutations that increase permeability can enhance susceptibility, while efflux pumps reduce it [2, 8].
From positive regulation of membrane permeability-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate membrane permeability? | CRISPR knockout in HEK293 or HeLa cells followed by permeability assays [1, 7] |
| What is the effect of a specific point mutation in VDAC1 on apoptosis? | Point mutation knock-in using CRISPR in cancer cell lines [6, 7] |
| Can overexpression of CLDN18.2 increase drug uptake? | Overexpression of CLDN18.2 in gastric cancer cells |
| How does a tagged version of OCLN localize during barrier regulation? | Knock-in of fluorescent tag at OCLN locus |
| Which genes modulate outer membrane permeability in E. coli? | CRISPR interference (CRISPRi) library screening |
| Does AQP3 knockout affect skin barrier recovery? | Knockout in mouse keratinocytes or 3D skin models |
How to Study the positive regulation of membrane permeability Process
| Method | What It Measures | Typical Application |
|---|---|---|
| TEER | Transepithelial electrical resistance | Tight junction permeability in Caco-2 cells |
| Fluorescent tracer flux | Paracellular permeability | Intestinal barrier function |
| Cytochrome c release | Mitochondrial outer membrane permeabilization | Apoptosis assays [6, 7] |
| RNA-seq | Gene expression changes | Identify regulators of permeability [1, 8] |
| Co-IP/MS | Protein-protein interactions | Map VDAC1 complexes |
| Live-cell imaging | Real-time permeability changes | TRP channel activation |
| CRISPR screen | Functional gene identification | Discover new permeability regulators |
| Patch clamp | Ion channel activity | TRP channel electrophysiology |
Permeability assays
Transepithelial electrical resistance (TEER) and fluorescent tracer flux are standard for measuring tight junction permeability in epithelial monolayers. For mitochondrial permeability, cytochrome c release and calcein-AM retention assays are used [6, 7].
Genomic and transcriptomic profiling
RNA-seq can identify changes in expression of claudins, porins, and channels upon perturbation. CRISPR screens coupled with RNA-seq reveal regulators of permeability [1, 8].
Proteomics and interactomics
Co-immunoprecipitation and mass spectrometry can map interactions between VDAC1 and BAX or alpha7 nAChR. Proximity labeling can identify novel components of tight junctions.
Imaging
Live-cell imaging with fluorescent dyes measures real-time permeability changes. Super-resolution microscopy visualizes tight junction dynamics [4, 5].
How CRISPR Can Be Used to Study GO:1905710 positive regulation of membrane permeability
Knockout
CRISPR knockout of candidate genes such as CLDN18, VDAC1, or TONB allows researchers to assess their necessity for membrane permeability. For example, VDAC1 knockout reduces mitochondrial permeabilization and apoptosis [6, 7]. In bacteria, tonB knockout decreases outer membrane permeability and iron uptake.
Point Mutation
Introducing specific point mutations via CRISPR base editing or HDR can dissect functional domains. For instance, mutating phosphorylation sites in tight junction proteins can reveal their role in barrier regulation. Point mutations in VDAC1 can block its channel activity.
Knock-in
Knock-in of fluorescent tags or epitope tags at endogenous loci enables real-time tracking of permeability regulators. Tagging OCLN with GFP allows visualization of tight junction dynamics. Knock-in of disease-associated mutations, such as in CLDN18, can model cancer.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can increase gene expression to study gain-of-function effects. Overexpressing CLDN18.2 in gastric cancer cells enhances zolbetuximab binding and drug uptake. Overexpression of AQP3 in keratinocytes increases water permeability.
How EDITGENE Supports positive regulation of membrane permeability Research
Researchers studying positive regulation of membrane permeability-related genes often need to determine whether a candidate gene is causally involved in barrier function, transport, or apoptosis. EDITGENE provides a comprehensive suite of CRISPR services to generate precisely engineered cell models, enabling rigorous functional validation.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of membrane permeability research.
Frequently Asked Questions About positive regulation of membrane permeability
What is GO:1905710?
GO:1905710 is the Gene Ontology term for positive regulation of membrane permeability, defined as any process that activates or increases the passage or uptake of molecules by a membrane [1, 2, 4].
What genes are involved in positive regulation of membrane permeability?
Key genes include CLDN18, VDAC1, BAX, TRPC1, OCLN, TJP1, and bacterial TONB, among others [1, 3, 4, 6, 7, 8].
How is membrane permeability regulated?
It is regulated by signals that activate channels, transporters, or tight junction complexes, often through phosphorylation or protein-protein interactions [3, 4, 6].
What diseases are associated with altered membrane permeability?
Cancer, inflammatory bowel disease, skin barrier defects, and antibiotic resistance are linked to dysregulated permeability [1, 4, 5, 8].
What is the role of VDAC1 in membrane permeability?
VDAC1 forms a channel in the mitochondrial outer membrane and is regulated by BAX and other proteins to control apoptosis [6, 7].
How can CRISPR be used to study membrane permeability?
CRISPR knockout, point mutation, knock-in, and overexpression allow precise perturbation of candidate genes to test their effects on permeability [1, 6, 7, 8].
What methods measure membrane permeability?
TEER, fluorescent tracer flux, cytochrome c release, and patch clamp are common assays [3, 4, 6].
Is positive regulation of membrane permeability a biological process?
Yes, GO:1905710 is classified under biological_process in the Gene Ontology.
What is the synonym for GO:1905710?
There are no synonyms listed for GO:1905710 in QuickGO.
How does zolbetuximab relate to membrane permeability?
Zolbetuximab targets claudin-18.2, a tight junction protein that can increase paracellular permeability in gastric cancer.
Conclusion
Positive regulation of membrane permeability (GO:1905710) is a fundamental biological process with broad implications for health and disease. From controlling nutrient uptake and apoptosis to mediating antibiotic resistance, the mechanisms that increase membrane permeability are diverse and tightly regulated [1, 2, 4, 6, 8]. Advances in CRISPR gene editing and functional genomics now allow researchers to systematically dissect these pathways, identify new therapeutic targets, and develop precision models [1, 7, 8]. EDITGENE's suite of CRISPR services empowers scientists to explore this process with rigor and efficiency.
References
- 1. Kubota Y et al.. 2024. Zolbetuximab for Claudin18.2-positive gastric or gastroesophageal junction cancer.. Ther Adv Med Oncol 16:17588359231217967 PMID: 38188462
- 2. Amaral L et al.. 2008. Control and regulation of permeability of MDR bacterial pathogens to antibiotics presented by COST Action BM0701.. Curr Drug Targets 9(9):718 PMID: 18781918
- 3. Hardie RC. 2014. Photosensitive TRPs.. Handb Exp Pharmacol 223:795-826 PMID: 24961970
- 4. Ulluwishewa D et al.. 2011. Regulation of tight junction permeability by intestinal bacteria and dietary components.. J Nutr 141(5):769-76 PMID: 21430248
- 5. Feingold KR et al.. 2007. The regulation of permeability barrier homeostasis.. J Invest Dermatol 127(7):1574-6 PMID: 17568800
- 6. Colombini M. 1987. Regulation of the mitochondrial outer membrane channel, VDAC.. J Bioenerg Biomembr 19(4):309-20 PMID: 3305491
- 7. Kalashnyk O et al.. 2020. Mitochondrial α7 nicotinic acetylcholine receptors are displaced from complexes with VDAC1 to form complexes with Bax upon apoptosis induction.. Int J Biochem Cell Biol 129:105879 PMID: 33147521
- 8. Qiu N et al.. 2019. Overcoming Iron Deficiency of an Escherichia coli tonB Mutant by Increasing Outer Membrane Permeability.. J Bacteriol 201(17) PMID: 31235517
