Urethral stricture
diseaseOn this page
Also known as urethral stricture (disease)
Summary
Urethral stricture (MONDO:0002127) is a disease with 2 cohort genes and 41 clinical trials. Top therapeutic interventions include bupivacaine, celecoxib, and gabapentin.
At a glance
- Cohort genes: 2
- ClinVar variants: 2
- Clinical trials: 41
Clinical features
No curated clinical features (Orphanet) for this disease.
Identifiers
Disease identifiers
| Field | Value |
|---|---|
| Canonical name | urethral stricture |
| Mondo ID | MONDO:0002127 |
| MeSH | D014525 |
| DOID | DOID:1829 |
| ICD-10-CM | N35 |
| ICD-11 | 611219038 |
| NCIT | C79821 |
| SNOMED CT | 76618002 |
| UMLS | C4551691 |
| MedGen | 1641821 |
| Is cancer (heuristic) | no |
Also known as: urethral stricture · urethral stricture (disease)
Data availability: 2 ClinVar variants · 1 HPO phenotype.
Disease family
An umbrella term covering 1 Mondo subtype.
Classification path: disease › human disease › disease by body system or component › urinary system disorder › urethral disorder › urethral obstruction › urethral stricture
Related subtypes (1): urethral obstruction sequence
Subtypes (1): infective urethral stricture
Genetics & variants
GWAS landscape
No GWAS associations recorded — common-variant (GWAS) studies don’t cover this disease (typical for Mendelian / rare diseases). See the curated gene cohort and Mendelian overlap below.
Variant details and genetic-evidence tiers
ClinVar germline variants
2 retrieved; paginated sample, class counts are floors:
2 uncertain significance
| ClinVar | Variant (HGVS) | Gene | Classification | Review |
|---|---|---|---|---|
| 638675 | GRCh37/hg19 15q12(chr15:27462869-27544157) | GABRG3 | Uncertain significance | no assertion criteria provided |
| 638674 | GRCh37/hg19 7q34(chr7:139478979-139550968) | TBXAS1 | Uncertain significance | no assertion criteria provided |
Genes & proteins
Mendelian disease overlap and somatic drivers
GenCC: 0 · Orphanet: 1 · OMIM-shared: 0 · Dual-evidence (GWAS+Mendelian): 0
Orphanet rare-disease linkage (cohort genes)
| Gene | Orphanet ID | Rare disease |
|---|---|---|
| TBXAS1 | Orphanet:1802 | Ghosal hematodiaphyseal dysplasia |
Cohort genes → proteins
2 cohort genes, 2 distinct canonical proteins.
Evidence partition
| Subset | Genes |
|---|---|
| multi_evidence | 2 |
Cohort genes (full)
| Symbol | HGNC | Ensembl | UniProt | Name | Evidence |
|---|---|---|---|---|---|
| TBXAS1 | HGNC:11609 | ENSG00000059377 | P24557 | Thromboxane-A synthase | clinvar |
| GABRG3 | HGNC:4088 | ENSG00000182256 | Q99928 | Gamma-aminobutyric acid receptor subunit gamma-3 | clinvar |
Cohort function summary
Lead sentence per gene, UniProt-curated.
| Symbol | Protein name | Function (lead sentence) |
|---|---|---|
| TBXAS1 | Thromboxane-A synthase | Catalyzes the conversion of prostaglandin H2 (PGH2) to thromboxane A2 (TXA2), a potent inducer of blood vessel constriction and platelet aggregation. |
| GABRG3 | Gamma-aminobutyric acid receptor subunit gamma-3 | Gamma subunit of the heteropentameric ligand-gated chloride channel gated by gamma-aminobutyric acid (GABA), a major inhibitory neurotransmitter in the brain. |
Protein-family classification
Druggable: 0 · Difficult: 0 · Unknown: 2 · Druggable fraction: 0.0
Family distribution
Cohort families vs a genome-wide background (hypergeometric, BH-FDR; fold = observed/expected). Counts kept; sorted by enrichment, so the catch-all Other/Unknown bucket no longer leads.
| Family | Genes | Fold | FDR |
|---|---|---|---|
| Other/Unknown | 2 | 1.8× | 0.312 |
Per-gene assignment
| Symbol | Family | Druggable? | EC | InterPro (top 3) |
|---|---|---|---|---|
| TBXAS1 | Other/Unknown | no | Cyt_P450, Cyt_P450_E_grp-I, Cyt_P450_CS | |
| GABRG3 | Other/Unknown | no | GABRG-1/4, GABBAg3_rcpt, GABAA/Glycine_rcpt |
Expression context
Cohort genes with no expression data: 0.
2 cohort genes are a single-cell marker in ≥1 SCXA experiment.
Breadth distribution (Bgee present_calls)
| Bucket | Genes |
|---|---|
| narrow (1-5 tissues) | 0 |
| moderate (6-20) | 0 |
| broad (>20) | 2 |
| unknown | 0 |
Top tissues across cohort
| Tissue | Cohort genes |
|---|---|
| leukocyte | 1 |
| monocyte | 1 |
| mononuclear cell | 1 |
| cortical plate | 1 |
| male germ line stem cell (sensu Vertebrata) in testis | 1 |
| right testis | 1 |
Per-gene tissue summary (top 30)
| Symbol | Bgee breadth | FANTOM5 breadth | SCXA | Top tissues |
|---|---|---|---|---|
| TBXAS1 | 180 | ubiquitous | marker | monocyte, mononuclear cell, leukocyte |
| GABRG3 | 115 | broad | marker | male germ line stem cell (sensu Vertebrata) in testis, cortical plate, right testis |
Protein interactions among cohort
Intra-cohort edges: 0.
Hub genes (top 10 by interactor count)
| Symbol | Interactor count |
|---|---|
| TBXAS1 | 2,072 |
| GABRG3 | 1,126 |
Structural data
PDB: 0 · AlphaFold-only: 2 · No structure: 0
AlphaFold-only cohort genes (top 30 by pLDDT)
| Symbol | UniProt | pLDDT |
|---|---|---|
| TBXAS1 | P24557 | 91.50 |
| GABRG3 | Q99928 | 75.44 |
Function
Pathway analysis
Distinct Reactome pathways touched by cohort: 15. Enrichment computed across 2 evidence-associated genes (2 with Reactome annotation).
Pathways by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 2 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| Pathway | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| Defective TBXAS1 causes GHDD | 1 | 5710.0× | 0.003 | TBXAS1 |
| Eicosanoids | 1 | 475.8× | 0.008 | TBXAS1 |
| Metabolic disorders of biological oxidation enzymes | 1 | 439.2× | 0.008 | TBXAS1 |
| Synthesis of Prostaglandins (PG) and Thromboxanes (TX) | 1 | 380.7× | 0.008 | TBXAS1 |
| Cytochrome P450 - arranged by substrate type | 1 | 356.9× | 0.008 | TBXAS1 |
| Arachidonate metabolism | 1 | 285.5× | 0.009 | TBXAS1 |
| GABA receptor activation | 1 | 158.6× | 0.013 | GABRG3 |
| Signaling by ERBB4 | 1 | 135.9× | 0.014 | GABRG3 |
| Phase I - Functionalization of compounds | 1 | 109.8× | 0.015 | TBXAS1 |
| Fatty acid metabolism | 1 | 65.6× | 0.021 | TBXAS1 |
| Biological oxidations | 1 | 64.9× | 0.021 | TBXAS1 |
| Diseases of metabolism | 1 | 40.2× | 0.031 | TBXAS1 |
| Metabolism of lipids | 1 | 15.8× | 0.072 | TBXAS1 |
| Disease | 1 | 6.5× | 0.158 | TBXAS1 |
| Metabolism | 1 | 5.8× | 0.165 | TBXAS1 |
GO biological processes by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 2 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| GO term | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| prostanoid biosynthetic process | 1 | 1203.7× | 0.005 | TBXAS1 |
| icosanoid metabolic process | 1 | 936.2× | 0.005 | TBXAS1 |
| intracellular chloride ion homeostasis | 1 | 842.6× | 0.005 | TBXAS1 |
| prostaglandin biosynthetic process | 1 | 561.7× | 0.005 | TBXAS1 |
| response to fatty acid | 1 | 526.6× | 0.005 | TBXAS1 |
| inhibitory synapse assembly | 1 | 312.1× | 0.006 | GABRG3 |
| positive regulation of vasoconstriction | 1 | 300.9× | 0.006 | TBXAS1 |
| gamma-aminobutyric acid signaling pathway | 1 | 271.8× | 0.006 | GABRG3 |
| synaptic transmission, GABAergic | 1 | 247.8× | 0.006 | GABRG3 |
| long-chain fatty acid biosynthetic process | 1 | 221.7× | 0.006 | TBXAS1 |
| chloride transmembrane transport | 1 | 118.7× | 0.010 | GABRG3 |
| response to ethanol | 1 | 73.3× | 0.015 | TBXAS1 |
| response to xenobiotic stimulus | 1 | 34.5× | 0.029 | GABRG3 |
Therapeutics
Drugs indicated for this disease
0 approved, 1 in late-stage (phase 3) trials. Disease-direct ChEMBL indications, not inferred from the associated-gene cohort below.
| Drug | Development status |
|---|---|
| Bupivacaine | Phase 3 (in late-stage trials) |
Earlier-phase candidates (phase 2, investigational — efficacy not yet established): Collagenase Clostridium Histolyticum, Mitomycin, Sodium Chloride.
Drug target analysis
Approved (phase 4): 2 · Phase ≥3: 2 · Phased (≥1): 2 · Undrugged: 0
Druggability breadth: 2 of 2 evidence-associated genes (100%) have a ChEMBL target (buckets above are over the deeply-mined display cohort).
Genes with an approved drug
The molecule shown is one approved compound that hits the gene — not necessarily a drug of choice or one indicated for this disease.
| Symbol | Example approved molecule |
|---|---|
| TBXAS1 | CLOTRIMAZOLE |
| GABRG3 | ENZALUTAMIDE |
Top cohort targets by molecule count
| Symbol | Molecules | Max phase |
|---|---|---|
| TBXAS1 | 46 | 4 |
| GABRG3 | 15 | 4 |
Drugs targeting cohort genes (top 30)
| Molecule | Max phase | Targets in cohort |
|---|---|---|
| CLOTRIMAZOLE | 4 | TBXAS1 |
| CISPLATIN | 4 | TBXAS1 |
| SAQUINAVIR | 4 | TBXAS1 |
| AMPRENAVIR | 4 | TBXAS1 |
| OZAGREL | 4 | TBXAS1 |
| GRAMICIDIN | 4 | TBXAS1 |
| ROSIGLITAZONE | 4 | TBXAS1 |
| SULCONAZOLE | 4 | TBXAS1 |
| OXICONAZOLE | 4 | TBXAS1 |
| KETOCONAZOLE | 4 | TBXAS1 |
| VINBLASTINE | 4 | TBXAS1 |
| RITONAVIR | 4 | TBXAS1 |
| NIFEDIPINE | 4 | TBXAS1 |
| BITHIONOL | 4 | TBXAS1 |
| 3,3’,4’,5-TETRACHLOROSALICYLANILIDE | 4 | TBXAS1 |
| TROGLITAZONE | 4 | TBXAS1 |
| DIETHYLSTILBESTROL | 4 | TBXAS1 |
| SULFASALAZINE | 4 | TBXAS1 |
| TROVAFLOXACIN | 4 | TBXAS1 |
| ERGOTAMINE | 4 | TBXAS1 |
| AMINOGLUTETHIMIDE | 4 | TBXAS1 |
| HEXACHLOROPHENE | 4 | TBXAS1 |
| TANNIC ACID | 4 | TBXAS1 |
| NELFINAVIR | 4 | TBXAS1 |
| INDOMETHACIN | 4 | TBXAS1 |
| ZAFIRLUKAST | 4 | TBXAS1 |
| MONTELUKAST | 4 | TBXAS1 |
| ECONAZOLE | 4 | TBXAS1 |
| TAMOXIFEN | 4 | TBXAS1 |
| MICONAZOLE | 4 | TBXAS1 |
Bioactivity and enzyme data
Enzyme cohort genes (≥1 EC): 0.
Cohort genes with ChEMBL bioactivity (full, sorted by assay count)
| Symbol | Assays | Type breakdown |
|---|---|---|
| TBXAS1 | 210 | Binding:138, Functional:72 |
| GABRG3 | 191 | Binding:172, Functional:15, Toxicity:3, ADMET:1 |
Cohort genes with high screening signal
≥100 ChEMBL assays — a studied-ness signal; see Therapeutics for approved-drug status.
| Symbol | ChEMBL assays |
|---|---|
| TBXAS1 | 210 |
| GABRG3 | 191 |
Pharmacogenomics
Cohort genes with a PharmGKB record: 2; with CPIC/DPWG dosing guidelines: 0.
No cohort gene has a CPIC/DPWG genotype-guided dosing guideline (PharmGKB).
Chemical tractability of cohort targets
30 approved/phased compounds have measured bioactivity against a cohort gene (and aren’t yet in disease-level trials). This is a research / tractability signal, NOT a therapeutic recommendation — a bioactivity row often reflects off-target or screening binding (e.g. promiscuous kinase inhibitors against a cohort kinase), implying no disease mechanism.
| Compound | Max phase | Cohort target (bioactivity) |
|---|---|---|
| CLOTRIMAZOLE | 4 | TBXAS1 |
| CISPLATIN | 4 | TBXAS1 |
| SAQUINAVIR | 4 | TBXAS1 |
| AMPRENAVIR | 4 | TBXAS1 |
| OZAGREL | 4 | TBXAS1 |
| GRAMICIDIN | 4 | TBXAS1 |
| ROSIGLITAZONE | 4 | TBXAS1 |
| SULCONAZOLE | 4 | TBXAS1 |
| OXICONAZOLE | 4 | TBXAS1 |
| KETOCONAZOLE | 4 | TBXAS1 |
| VINBLASTINE | 4 | TBXAS1 |
| RITONAVIR | 4 | TBXAS1 |
| NIFEDIPINE | 4 | TBXAS1 |
| BITHIONOL | 4 | TBXAS1 |
| 3,3’,4’,5-TETRACHLOROSALICYLANILIDE | 4 | TBXAS1 |
| TROGLITAZONE | 4 | TBXAS1 |
| DIETHYLSTILBESTROL | 4 | TBXAS1 |
| SULFASALAZINE | 4 | TBXAS1 |
| TROVAFLOXACIN | 4 | TBXAS1 |
| ERGOTAMINE | 4 | TBXAS1 |
| AMINOGLUTETHIMIDE | 4 | TBXAS1 |
| HEXACHLOROPHENE | 4 | TBXAS1 |
| TANNIC ACID | 4 | TBXAS1 |
| NELFINAVIR | 4 | TBXAS1 |
| INDOMETHACIN | 4 | TBXAS1 |
| ZAFIRLUKAST | 4 | TBXAS1 |
| MONTELUKAST | 4 | TBXAS1 |
| ECONAZOLE | 4 | TBXAS1 |
| TAMOXIFEN | 4 | TBXAS1 |
| MICONAZOLE | 4 | TBXAS1 |
Druggability pyramid
Cohort genes binned by druggability tier (high → low):
| Tier | Definition | Genes | Symbols |
|---|---|---|---|
| A | Approved (phase 4 drug) | 2 | TBXAS1, GABRG3 |
| B | Phased (≥1) drug, not yet approved | 0 | |
| C | Druggable family + PDB, no drug | 0 | |
| D | Druggable family + AlphaFold only, no drug | 0 | |
| E | Difficult family or no structure, no drug | 0 |
Undrugged target profiles
0 cohort genes are undrugged. Ranked by ‘starting-point quality’ (assay depth + drugged-partner adjacency).
Clinical trials & evidence
Clinical trials
Clinical trials: 41.
Phase distribution (across all retrieved trials)
| Phase | Trials |
|---|---|
| Not specified | 26 |
| PHASE4 | 5 |
| PHASE2 | 3 |
| PHASE3 | 2 |
| PHASE1 | 2 |
| PHASE2/PHASE3 | 1 |
| PHASE1/PHASE2 | 1 |
| EARLY_PHASE1 | 1 |
Top trials by phase / activity
| NCT | Phase | Status | Title |
|---|---|---|---|
| NCT05383274 | PHASE4 | RECRUITING | Optilume PoST AppRoval Clinical Evaluation of Andrology ParaMeters |
| NCT06795074 | PHASE4 | RECRUITING | Risk of Recurrent Urethral Stricture After Treatment With Paclitaxel-Coated Dilatation Balloon (Optilume) Compared With Non-coated Dilatation Balloon |
| NCT07501884 | PHASE4 | NOT_YET_RECRUITING | REDUCER Trial (TXA in Urethroplasty) |
| NCT01196572 | PHASE4 | UNKNOWN | Efficiency of Cold vs. Laser Internal Urethrotomy Treatment of Urethral Strictures |
| NCT03859024 | PHASE4 | COMPLETED | Efficacy of Opioid-limiting Pain Management Protocol in Men Undergoing Urethroplasty |
| NCT00270504 | PHASE3 | COMPLETED | Memokath® 044TW Stent for Treatment of Urethral Stricture |
| NCT03720223 | PHASE3 | COMPLETED | Liposomal Bupivacaine To Control Post-Operative Pain Following BMG |
| NCT06232005 | PHASE2/PHASE3 | COMPLETED | Intralesional Injection of Mitomycin C Following Visual Internal Urethrotomy for Recurrent Urethral Stricture |
| NCT00535717 | PHASE2 | COMPLETED | Role of Uttarbasti in the Management of Mutra Marga Sankoch (Urethral Stricture) |
| NCT00918528 | PHASE1/PHASE2 | UNKNOWN | Effect of Mitomycin C on Urethral Stricture Recurrence After Internal Urethrotomy |
| NCT02948842 | PHASE2 | COMPLETED | Clostridium Histolyticum Collagenase Injection for Urethral Disease |
| NCT04307537 | PHASE2 | COMPLETED | Post-Operative Imaging After Urethroplasty With Peri-catheter Retrograde Urethrography Or Trial of Voiding With Voiding Cysto-urethrography |
| NCT03258658 | PHASE1 | RECRUITING | Safety and Feasibility Study of Autologous Engineered Urethral Constructs for the Treatment of Strictures |
| NCT03061344 | PHASE1 | UNKNOWN | Liquid Buccal Mucosa Graft Urethroplasty |
| NCT03205670 | EARLY_PHASE1 | UNKNOWN | Tissue-engineered Construct Based on Buccal Mucosa Cells and Matrix From Collagen and Polylactoglycolide Fibers |
| NCT03499964 | Not specified | ACTIVE_NOT_RECRUITING | ROBUST III- Re-Establishing Flow Via Drug Coated Balloon For The Treatment Of Urethral Stricture Disease |
| NCT04071925 | Not specified | RECRUITING | 9000 URETHRA STUDY: a Study About Urethroplasty for Urethral Stricture Disease |
| NCT04965025 | Not specified | RECRUITING | Multi-stage Urethroplasty with Augmentation Using a Dorsal Graft Inlay Technique Comparing Graft Use in First or Second Stage |
| NCT06362083 | Not specified | RECRUITING | Urethral Stricture Database |
| NCT06827210 | Not specified | NOT_YET_RECRUITING | Treatment of Bulbar Urethral Strictures With Optilume Drug-Coated Balloons in an Untreated Population |
| NCT07074717 | Not specified | RECRUITING | Penile Skin Versus Buccal Mucosal Graft in Augmentation Urethroplasty for Long Anterior Urethral Stricture |
| NCT07375641 | Not specified | NOT_YET_RECRUITING | The Impact of Age and Sex on Anticipated and Experienced Pain in First-Time Outpatient Flexible Cystoscopy |
| NCT07403786 | Not specified | RECRUITING | Urethral Resistive Index (URI): A New Parameter for Diagnosing Urethral Obstruction |
| NCT07508566 | Not specified | NOT_YET_RECRUITING | A Comparative Study of the Antibacterial Effects of Two Preoperative Hair Removal Methods in Male Patients With Urethral Stricture |
| NCT01982136 | Not specified | COMPLETED | Functional Outcome of Urethral Reconstructive Surgery |
| NCT02321670 | Not specified | COMPLETED | Scandinavian Urethroplasty Study |
| NCT02551783 | Not specified | TERMINATED | Dorsal vs. Ventral Buccal Graft Dorsal vs. Ventral Buccal Graft |
| NCT02634619 | Not specified | TERMINATED | A Study of Dorsal Versus Ventral Buccal Mucosa Graft Onlay for Bulbar Urethroplasty |
| NCT03270384 | Not specified | COMPLETED | Re-establishing Flow Via Drug Coated Balloon For The Treatment Of Urethral Stricture Disease |
| NCT03572348 | Not specified | COMPLETED | VeSpAR: Comparing Vessel-Sparing Anastomotic Repair and Transecting Anastomotic Repair in Isolated Short Bulbar Strictures. |
| NCT03851952 | Not specified | WITHDRAWN | Re-Establishing Flow Via Drug Coated Balloon for the Treatment of Urethral Stricture Disease - Registry Study |
| NCT03973619 | Not specified | COMPLETED | Urethral Stricture: A Comparison Between Jugal or Labial Graft Urethroplasty |
| NCT04161365 | Not specified | UNKNOWN | Feasibility and Therapeutic Potential of Free Fat Grafts in the Treatment of Urethral Strictures |
| NCT04357080 | Not specified | COMPLETED | Factors Predicting Urethral Stricture Recurrence After Dorsal Onlay Augmented, Buccal Mucosal Graft Urethroplasty |
| NCT05078788 | Not specified | COMPLETED | Holmium Laser Uretherotomy in Combination With Intralesional Steroids in Bulbar Uretheral Stricture |
| NCT05451732 | Not specified | UNKNOWN | Nanofat Grafting in Male and Female Subjects Affected by Urethral Strictures |
| NCT05463991 | Not specified | COMPLETED | Bioengineered Collagen Implant for Urethral Stricture Repair |
| NCT05464290 | Not specified | UNKNOWN | The Nanofat Regenerative Surgery for Management of Genital Lichen Sclerosus in Male and Female Patients |
| NCT05519566 | Not specified | UNKNOWN | The Accuracy of Pulsed Fluoroscopy Retrograde Urethrogram Vs the Traditional Retrograde Urethrogram In Diagnosing Urethral Stricture |
| NCT06064968 | Not specified | COMPLETED | Effectiveness of Intermittent Bladder Catheterization (IBC) in Reducing Recurrence of Urethral Stricture |
Drugs tested across these trials (top 30)
| Molecule | Max phase | Trials referencing |
|---|---|---|
| BUPIVACAINE | 4 | 2 |
| CELECOXIB | 4 | 1 |
| GABAPENTIN | 4 | 1 |
| MITOMYCIN | 4 | 1 |
| OXYCODONE | 4 | 1 |
| CHEMBL4071382 | 0 | 1 |
| CHEMBL5175144 | 0 | 1 |
Related Atlas pages
- Cohort genes: TBXAS1, GABRG3
- Drugs: Bupivacaine, Celecoxib, Gabapentin, Mitomycin, Oxycodone