Biliary atresia
diseaseOn this page
Also known as atresia of bile ductsbiliary atresia, congenitalcongenital biliary atresiaisolated atresia of bile ductsnon-syndromic biliary atresia
Summary
Biliary atresia (MONDO:0008867) is a disease with 4 cohort genes (41 GWAS associations across 7 studies) and 62 clinical trials. Top therapeutic interventions include desflurane, indocyanine green acid form, and odevixibat.
At a glance
- Prevalence: 1-9 / 100 000 (Europe) [Orphanet-validated]
- Cohort genes: 4
- GWAS associations: 41
- Phenotypes (HPO): 28
- Clinical trials: 62
Clinical features
Epidemiology
Prevalence records
18 prevalence record(s), Orphanet:
| Type | Class | Value | Geography | Validation |
|---|---|---|---|---|
| Prevalence at birth | 1-5 / 10 000 | 18.5 | Worldwide | Validated |
| Point prevalence | 1-9 / 100 000 | Europe | Validated | |
| Prevalence at birth | 1-9 / 100 000 | 2.9 | Europe | Validated |
| Point prevalence | 1-5 / 10 000 | 10.6 | Specific population | Validated |
| Prevalence at birth | 1-9 / 100 000 | 2.9 | Belgium | Validated |
| Prevalence at birth | 1-9 / 100 000 | 5.9 | France | Validated |
| Prevalence at birth | 1-5 / 10 000 | 11.9 | Germany | Validated |
| Prevalence at birth | 1-9 / 100 000 | 4.2 | Italy | Validated |
| Prevalence at birth | 1-5 / 10 000 | 16.6 | Netherlands | Validated |
| Prevalence at birth | 1-9 / 100 000 | 1.6 | Norway | Validated |
| Prevalence at birth | 1-9 / 100 000 | 1.9 | Spain | Validated |
| Prevalence at birth | 1-5 / 10 000 | 12.6 | Switzerland | Validated |
| Prevalence at birth | 1-9 / 100 000 | 2.3 | United Kingdom | Validated |
| Prevalence at birth | 1-5 / 10 000 | 12.7 | Ukraine | Validated |
| Prevalence at birth | 1-9 / 100 000 | 7.4 | Japan | Validated |
| Prevalence at birth | 1-5 / 10 000 | 32 | French Polynesia | Validated |
| Prevalence at birth | 1-9 / 100 000 | 7 | Australia | Validated |
| Prevalence at birth | 1-9 / 100 000 | 7 | United States | Not yet validated |
Signs & symptoms
Clinical features (HPO)
28 HPO clinical features (Orphanet curated; top 28 by frequency):
| HPO ID | Term | Frequency |
|---|---|---|
| HP:0000952 | Jaundice | Very frequent (80-99%) |
| HP:0001396 | Cholestasis | Very frequent (80-99%) |
| HP:0001508 | Failure to thrive | Very frequent (80-99%) |
| HP:0001410 | Decreased liver function | Frequent (30-79%) |
| HP:0001525 | Severe failure to thrive | Frequent (30-79%) |
| HP:0002240 | Hepatomegaly | Frequent (30-79%) |
| HP:0002630 | Fat malabsorption | Frequent (30-79%) |
| HP:0002908 | Conjugated hyperbilirubinemia | Frequent (30-79%) |
| HP:0002910 | Elevated circulating hepatic transaminase concentration | Frequent (30-79%) |
| HP:0003155 | Elevated circulating alkaline phosphatase concentration | Frequent (30-79%) |
| HP:0006579 | Prolonged neonatal jaundice | Frequent (30-79%) |
| HP:0008151 | Prolonged prothrombin time | Frequent (30-79%) |
| HP:0011984 | Atretic gallbladder | Frequent (30-79%) |
| HP:0011985 | Acholic stools | Frequent (30-79%) |
| HP:0030948 | Elevated gamma-glutamyltransferase level | Frequent (30-79%) |
| HP:0040321 | Dark yellow urine | Frequent (30-79%) |
| HP:0000602 | Ophthalmoplegia | Occasional (5-29%) |
| HP:0000821 | Hypothyroidism | Occasional (5-29%) |
| HP:0000989 | Pruritus | Occasional (5-29%) |
| HP:0001250 | Seizure | Occasional (5-29%) |
| HP:0001394 | Cirrhosis | Occasional (5-29%) |
| HP:0001405 | Periportal fibrosis | Occasional (5-29%) |
| HP:0001408 | Bile duct proliferation | Occasional (5-29%) |
| HP:0001518 | Small for gestational age | Occasional (5-29%) |
| HP:0001744 | Splenomegaly | Occasional (5-29%) |
| HP:0001999 | Abnormal facial shape | Occasional (5-29%) |
| HP:0040075 | Hypopituitarism | Occasional (5-29%) |
| HP:0001114 | Xanthelasma | Very rare (<1-4%) |
Identifiers
Disease identifiers
| Field | Value |
|---|---|
| Canonical name | biliary atresia |
| Mondo ID | MONDO:0008867 |
| MeSH | D001656 |
| Orphanet | 30391 |
| DOID | DOID:13608 |
| ICD-10-CM | Q44.2 |
| ICD-11 | 645741117 |
| NCIT | C34421 |
| SNOMED CT | 77480004 |
| UMLS | C0005411 |
| MedGen | 14117 |
| GARD | 0012010 |
| MedDRA | 10003650 |
| NORD | 1114 |
| Is cancer (heuristic) | no |
Also known as: atresia of bile ducts · biliary atresia, congenital · congenital biliary atresia · isolated atresia of bile ducts · non-syndromic biliary atresia
Data availability: 41 GWAS associations (7 studies) · 11 cell lines.
Disease family
An umbrella term covering 3 Mondo subtypes.
Classification path: disease › human disease › disease by body system or component › digestive system disorder › hepatobiliary disorder › biliary tract disorder › bile duct disorder › cholestasis › biliary atresia
Related subtypes (4): extrahepatic cholestasis, obstructive jaundice, intrahepatic cholestasis, parenteral nutrition-associated cholestasis
Subtypes (3): biliary atresia intrahepatic non syndromic form, biliary atresia intrahepatic syndromic form, extrahepatic biliary atresia
Genetics & variants
GWAS landscape
41 GWAS associations across 7 studies. Top hits map to 29 distinct genes (as reported by GWAS).
Top associations by p-value
| rsID | p-value | Gene | Risk allele | Odds ratio |
|---|---|---|---|---|
| rs17095355 | 5e-11 | ADD3-AS1 | ? | 1.7 |
| rs10884919 | 6e-09 | ADD3, ADD3-AS1 | ? | 1.6 |
| rs2083872 | 7e-09 | LINC00705, MANCR | T | 3.41 |
| rs114118902 | 7e-09 | SCN1A-AS1, SCN9A | G | 3.66 |
| rs6761893 | 3e-08 | EFEMP1 | T | 1.54 |
| rs6446628 | 4e-08 | AFAP1 | A | 1.41 |
| rs12964783 | 6e-08 | KC6 | A | 0.65 |
| rs34599046 | 1e-07 | TUSC3 | G | 1.4 |
| rs7785003 | 2e-07 | UMAD1 | A | 0.61 |
| rs111814934 | 3e-07 | GLIS3 | C | 1.97 |
| rs10111159 | 5e-07 | RP1 | T | 2.69 |
| rs79722046 | 8e-07 | RPL7AP40 - AP1S2P1 | T | 1.87 |
| rs79812751 | 1e-06 | MAP1LC3C - TUBB8P6 | T | 2.11 |
| rs9314986 | 2e-06 | LINC00297 | G | 2.95 |
| rs11111419 | 2e-06 | PAH | T | 1.34 |
| rs7255262 | 2e-06 | VAV1 - ADGRE1 | C | 0.57 |
| rs1349341 | 3e-06 | MTHFD2P4 - TOMM22P4 | G | 1.42 |
| rs12532246 | 3e-06 | RNF32-DT | A | 1.34 |
| rs115074361 | 3e-06 | AACSP1 - ZNF354B | A | 3 |
| rs3733850 | 3e-06 | CSNK1A1 | C | 2.62 |
| rs111550434 | 3e-06 | ANKFN1 | C | 2.41 |
| rs707936 | 3e-06 | VWA7 | ? | |
| rs356287 | 4e-06 | COX6A1P1 - LINC01781 | G | 1.48 |
| rs12023563 | 4e-06 | SERTAD4 - ST13P19 | G | 1.59 |
| rs371776 | 4e-06 | GDNF-AS1 | G | 0.75 |
| rs7861188 | 4e-06 | PTPRD-DT | A | 1.42 |
| rs1299828729 | 4e-06 | NKAIN2 | CTGTG | 1.32 |
| rs7099863 | 4e-06 | GPAM - TECTB | C | 0.74 |
| rs854132 | 5e-06 | LNCBRM | A | 1.35 |
| rs112220674 | 5e-06 | RAB20 | T | 0.53 |
Top studies (by case count)
| Study | Lead author | Year | Cases | Controls | Title |
|---|---|---|---|---|---|
| GCST90296484 | Glessner JT | 2023 | 811 | 4,654 | Biliary atresia is associated with polygenic susceptibility in ciliogenesis and planar polarity effector genes. |
| GCST006390 | Chen Y | 2018 | 343 | 1,716 | A genome-wide association study identifies a susceptibility locus for biliary atresia on 2p16.1 within the gene EFEMP1. |
| GCST90428734 | Cui MM | 2023 | 317 | 8,843 | Contribution of ADD3 and the HLA Genes to Biliary Atresia Risk in Chinese. |
| GCST000681 | Garcia-Barcelo MM | 2010 | 281 | 0 | Genome-wide association study identifies a susceptibility locus for biliary atresia on 10q24.2. |
| GCST90428736 | Cui MM | 2023 | 141 | 8,843 | Contribution of ADD3 and the HLA Genes to Biliary Atresia Risk in Chinese. |
| GCST90428737 | Cui MM | 2023 | 141 | 0 | Contribution of ADD3 and the HLA Genes to Biliary Atresia Risk in Chinese. |
| GCST90428735 | Cui MM | 2023 | 87 | 8,843 | Contribution of ADD3 and the HLA Genes to Biliary Atresia Risk in Chinese. |
Variant details and genetic-evidence tiers
Tier distribution (top 50 variants)
| Tier | Variants |
|---|---|
| Tier 1: coding | 0 |
| Tier 2: splice/UTR | 0 |
| Tier 3: regulatory | 1 |
| Tier 4: intronic/intergenic | 39 |
MAF distribution
| Bucket | Variants |
|---|---|
| common (>=0.05) | 33 |
| low_freq (0.01-0.05) | 1 |
| rare (<0.01) | 0 |
| unknown | 6 |
Functional consequences
| Consequence | Count |
|---|---|
| intron_variant | 32 |
| intergenic_variant | 7 |
| regulatory_region_variant | 1 |
Top variants
| rsID | Chr | Pos | Alleles | MAF | Consequence | Gene | p-value | Tier |
|---|---|---|---|---|---|---|---|---|
| rs17095355 | 10 | 109975992 | C>T | 0.05 | intron_variant | ADD3-AS1 | 5e-11 | Tier 4: intronic/intergenic |
| rs10884919 | 10 | 109998033 | G>A | 0.05 | intron_variant | ADD3, ADD3-AS1 | 6e-09 | Tier 4: intronic/intergenic |
| rs2083872 | 10 | 4676262 | C>T | 0.05 | intron_variant | LINC00705, MANCR | 7e-09 | Tier 4: intronic/intergenic |
| rs114118902 | 2 | 166325739 | A>G | intron_variant | SCN1A-AS1, SCN9A | 7e-09 | Tier 4: intronic/intergenic | |
| rs6761893 | 2 | 55891970 | A>C,G,T | 0.34 | intron_variant | EFEMP1 | 3e-08 | Tier 4: intronic/intergenic |
| rs6446628 | 4 | 7830208 | A>C | 0.05 | intron_variant | AFAP1 | 4e-08 | Tier 4: intronic/intergenic |
| rs12964783 | 18 | 41463791 | C>A | 0.05 | intron_variant | KC6 | 6e-08 | Tier 4: intronic/intergenic |
| rs34599046 | 8 | 15687363 | C>A,G | 0.05 | intron_variant | TUSC3 | 1e-07 | Tier 4: intronic/intergenic |
| rs7785003 | 7 | 7823672 | G>A,T | 0.05 | intron_variant | UMAD1 | 2e-07 | Tier 4: intronic/intergenic |
| rs111814934 | 9 | 4132045 | T>C,G | 0.05 | intron_variant | GLIS3 | 3e-07 | Tier 4: intronic/intergenic |
| rs10111159 | 8 | 54826227 | A>T | 0.05 | intron_variant | RP1 | 5e-07 | Tier 4: intronic/intergenic |
| rs79722046 | 7 | 97339055 | A>T | 0.05 | intron_variant | RPL7AP40 - AP1S2P1 | 8e-07 | Tier 4: intronic/intergenic |
| rs79812751 | 1 | 242029258 | C>T | 0.05 | intron_variant | MAP1LC3C - TUBB8P6 | 1e-06 | Tier 4: intronic/intergenic |
| rs9314986 | 13 | 29884600 | G>A,C,T | 0.044 | intron_variant | LINC00297 | 2e-06 | Tier 4: intronic/intergenic |
| rs11111419 | 12 | 102891265 | A>T | 0.05 | intron_variant | PAH | 2e-06 | Tier 4: intronic/intergenic |
| rs7255262 | 19 | 6872970 | T>C,G | 0.05 | intergenic_variant | VAV1 - ADGRE1 | 2e-06 | Tier 4: intronic/intergenic |
| rs1349341 | 4 | 162359753 | G>A,C,T | 0.05 | intergenic_variant | MTHFD2P4 - TOMM22P4 | 3e-06 | Tier 4: intronic/intergenic |
| rs12532246 | 7 | 156483612 | A>G | 0.05 | intron_variant | RNF32-DT | 3e-06 | Tier 4: intronic/intergenic |
| rs115074361 | 5 | 178830323 | T>A | intergenic_variant | AACSP1 - ZNF354B | 3e-06 | Tier 4: intronic/intergenic | |
| rs3733850 | 5 | 149520216 | T>C | 0.05 | intron_variant | CSNK1A1 | 3e-06 | Tier 4: intronic/intergenic |
| rs111550434 | 17 | 56310656 | T>C | 0.05 | intron_variant | ANKFN1 | 3e-06 | Tier 4: intronic/intergenic |
| rs707936 | 6 | 31765873 | G>A,C | 0.05 | intron_variant | VWA7 | 3e-06 | Tier 4: intronic/intergenic |
| rs356287 | 1 | 80512278 | A>G | 0.36 | intergenic_variant | COX6A1P1 - LINC01781 | 4e-06 | Tier 4: intronic/intergenic |
| rs12023563 | 1 | 210262765 | G>A | 0.32 | regulatory_region_variant | SERTAD4 - ST13P19 | 4e-06 | Tier 3: regulatory |
| rs371776 | 5 | 38020688 | G>A,C,T | 0.05 | intron_variant | GDNF-AS1 | 4e-06 | Tier 4: intronic/intergenic |
| rs7861188 | 9 | 10614869 | A>C,G,T | 0.05 | intron_variant | PTPRD-DT | 4e-06 | Tier 4: intronic/intergenic |
| rs1299828729 | 6 | 123833691 | C>G | intron_variant | NKAIN2 | 4e-06 | Tier 4: intronic/intergenic | |
| rs7099863 | 10 | 112254084 | T>A,C | 0.05 | intron_variant | GPAM - TECTB | 4e-06 | Tier 4: intronic/intergenic |
| rs854132 | 5 | 57622558 | T>A,C | 0.05 | intron_variant | LNCBRM | 5e-06 | Tier 4: intronic/intergenic |
| rs112220674 | 13 | 110535030 | C>T | 0.05 | intron_variant | RAB20 | 5e-06 | Tier 4: intronic/intergenic |
Genes & proteins
Mendelian disease overlap and somatic drivers
GenCC: 0 · Orphanet: 2 · OMIM-shared: 0 · Dual-evidence (GWAS+Mendelian): 0
Orphanet rare-disease linkage (cohort genes)
| Gene | Orphanet ID | Rare disease |
|---|---|---|
| ADD3 | Orphanet:210141 | Inherited congenital spastic tetraplegia |
| HOXC13 | Orphanet:69084 | Pure hair and nail ectodermal dysplasia |
Cohort genes → proteins
4 cohort genes, 4 distinct canonical proteins.
Evidence partition
| Subset | Genes |
|---|---|
| gwas_only | 4 |
Cohort genes (full)
| Symbol | HGNC | Ensembl | UniProt | Name | Evidence |
|---|---|---|---|---|---|
| UBL3 | HGNC:12504 | ENSG00000122042 | O95164 | Ubiquitin-like protein 3 | gwas |
| XPNPEP1 | HGNC:12822 | ENSG00000108039 | Q9NQW7 | Xaa-Pro aminopeptidase 1 | gwas |
| ADD3 | HGNC:245 | ENSG00000148700 | Q9UEY8 | Gamma-adducin | gwas |
| HOXC13 | HGNC:5125 | ENSG00000123364 | P31276 | Homeobox protein Hox-C13 | gwas |
Cohort function summary
Lead sentence per gene, UniProt-curated.
| Symbol | Protein name | Function (lead sentence) |
|---|---|---|
| XPNPEP1 | Xaa-Pro aminopeptidase 1 | Metalloaminopeptidase that catalyzes the removal of a penultimate prolyl residue from the N-termini of peptides, such as Arg-Pro-Pro. |
| ADD3 | Gamma-adducin | Membrane-cytoskeleton-associated protein that promotes the assembly of the spectrin-actin network. |
| HOXC13 | Homeobox protein Hox-C13 | Transcription factor which plays a role in hair follicle differentiation. |
Protein-family classification
Druggable: 1 · Difficult: 1 · Unknown: 2 · Druggable fraction: 0.25
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 |
|---|---|---|---|
| Protease | 1 | 9.2× | 0.315 |
| Transcription factor | 1 | 2.1× | 0.605 |
| Other/Unknown | 2 | 0.9× | 0.769 |
Per-gene assignment
| Symbol | Family | Druggable? | EC | InterPro (top 3) |
|---|---|---|---|---|
| UBL3 | Other/Unknown | no | Ubiquitin-like_dom, MUB, Ubiquitin-like_domsf | |
| XPNPEP1 | Protease | yes | 3.1.8.1 | Creatinase_N, Pept_M24, Peptidase_M24B_aminopep-P_CS |
| ADD3 | Other/Unknown | no | Aldolase_II/adducin_N, Aldolase_II/adducin_N_sf, Aldolase-II_Adducin_sf | |
| HOXC13 | Transcription factor | no | HD, Homeodomain-like_sf, Homeobox_CS |
Expression context
Cohort genes with no expression data: 0.
3 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) | 4 |
| unknown | 0 |
Top tissues across cohort
| Tissue | Cohort genes |
|---|---|
| dorsal motor nucleus of vagus nerve | 2 |
| amniotic fluid | 1 |
| inferior olivary complex | 1 |
| body of pancreas | 1 |
| cervix squamous epithelium | 1 |
| jejunal mucosa | 1 |
| oocyte | 1 |
| secondary oocyte | 1 |
| hair follicle | 1 |
| olfactory bulb | 1 |
| type B pancreatic cell | 1 |
Per-gene tissue summary (top 30)
| Symbol | Bgee breadth | FANTOM5 breadth | SCXA | Top tissues |
|---|---|---|---|---|
| UBL3 | 295 | ubiquitous | marker | inferior olivary complex, amniotic fluid, dorsal motor nucleus of vagus nerve |
| XPNPEP1 | 294 | ubiquitous | marker | body of pancreas, jejunal mucosa, cervix squamous epithelium |
| ADD3 | 303 | ubiquitous | marker | secondary oocyte, oocyte, dorsal motor nucleus of vagus nerve |
| HOXC13 | 33 | broad | yes | hair follicle, type B pancreatic cell, olfactory bulb |
Protein interactions among cohort
Intra-cohort edges: 1.
Hub genes (top 10 by interactor count)
| Symbol | Interactor count |
|---|---|
| XPNPEP1 | 2,169 |
| ADD3 | 1,882 |
| HOXC13 | 1,247 |
| UBL3 | 745 |
Intra-cohort edges
| A | B | Sources |
|---|---|---|
| ADD3 | XPNPEP1 | string_interaction |
Structural data
PDB: 2 · AlphaFold-only: 2 · No structure: 0
Cohort genes with PDB structures (top 30)
| Symbol | UniProt | PDB entries |
|---|---|---|
| UBL3 | O95164 | 1 |
| XPNPEP1 | Q9NQW7 | 1 |
AlphaFold-only cohort genes (top 30 by pLDDT)
| Symbol | UniProt | pLDDT |
|---|---|---|
| ADD3 | Q9UEY8 | 66.83 |
| HOXC13 | P31276 | 58.40 |
Function
Pathway analysis
Distinct Reactome pathways touched by cohort: 8. Enrichment computed across 4 evidence-associated genes (1 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 1 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| Pathway | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| Miscellaneous transport and binding events | 1 | 439.2× | 0.013 | ADD3 |
| RHOF GTPase cycle | 1 | 259.6× | 0.013 | ADD3 |
| RHOD GTPase cycle | 1 | 203.9× | 0.013 | ADD3 |
| RHO GTPase cycle | 1 | 60.1× | 0.033 | ADD3 |
| Signaling by Rho GTPases | 1 | 34.2× | 0.040 | ADD3 |
| Signaling by Rho GTPases, Miro GTPases and RHOBTB3 | 1 | 33.5× | 0.040 | ADD3 |
| Transport of small molecules | 1 | 25.1× | 0.045 | ADD3 |
| Signal Transduction | 1 | 10.2× | 0.098 | ADD3 |
GO biological processes by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 3 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| GO term | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| tongue morphogenesis | 1 | 1123.5× | 0.004 | HOXC13 |
| positive regulation of cytoskeleton organization | 1 | 936.2× | 0.004 | ADD3 |
| bradykinin catabolic process | 1 | 802.5× | 0.004 | XPNPEP1 |
| nail development | 1 | 802.5× | 0.004 | HOXC13 |
| barbed-end actin filament capping | 1 | 267.5× | 0.010 | ADD3 |
| negative regulation of programmed cell death | 1 | 244.2× | 0.010 | XPNPEP1 |
| positive regulation of vasoconstriction | 1 | 200.6× | 0.010 | ADD3 |
| hair follicle development | 1 | 127.7× | 0.014 | HOXC13 |
| anterior/posterior pattern specification | 1 | 60.4× | 0.026 | HOXC13 |
| anatomical structure morphogenesis | 1 | 46.4× | 0.030 | HOXC13 |
| response to xenobiotic stimulus | 1 | 23.0× | 0.054 | ADD3 |
| proteolysis | 1 | 11.4× | 0.099 | XPNPEP1 |
| positive regulation of DNA-templated transcription | 1 | 9.3× | 0.112 | HOXC13 |
| regulation of transcription by RNA polymerase II | 1 | 3.9× | 0.236 | HOXC13 |
Therapeutics
Drugs indicated for this disease
0 approved, 2 in late-stage (phase 3) trials. Disease-direct ChEMBL indications, not inferred from the associated-gene cohort below.
| Drug | Development status |
|---|---|
| Odevixibat | Phase 3 (in late-stage trials) |
| Prednisolone | Phase 3 (in late-stage trials) |
Earlier-phase candidates (phase 2, investigational — efficacy not yet established): Acetylcysteine, Filgrastim, Maralixibat, Pentoxifylline.
Drug target analysis
Approved (phase 4): 0 · Phase ≥3: 0 · Phased (≥1): 0 · Undrugged: 4
Druggability breadth: 1 of 4 evidence-associated genes (25%) have a ChEMBL target (buckets above are over the deeply-mined display cohort).
Top cohort targets by molecule count
| Symbol | Molecules | Max phase |
|---|---|---|
| UBL3 | 0 | 0 |
| XPNPEP1 | 0 | 0 |
| ADD3 | 0 | 0 |
| HOXC13 | 0 | 0 |
Bioactivity and enzyme data
Enzyme cohort genes (≥1 EC): 1.
Cohort genes with ChEMBL bioactivity (full, sorted by assay count)
| Symbol | Assays | Type breakdown |
|---|---|---|
| XPNPEP1 | 10 | Binding:9, ADMET:1 |
Cohort enzymes (BRENDA EC)
| Symbol | EC numbers | Names |
|---|---|---|
| XPNPEP1 | 3.1.8.1, 3.4.11.9 | aryldialkylphosphatase, Xaa-Pro aminopeptidase |
Pharmacogenomics
Cohort genes with a PharmGKB record: 4; with CPIC/DPWG dosing guidelines: 0.
No cohort gene has a CPIC/DPWG genotype-guided dosing guideline (PharmGKB).
Chemical tractability of cohort targets
0 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.
Druggability pyramid
Cohort genes binned by druggability tier (high → low):
| Tier | Definition | Genes | Symbols |
|---|---|---|---|
| A | Approved (phase 4 drug) | 0 | |
| B | Phased (≥1) drug, not yet approved | 0 | |
| C | Druggable family + PDB, no drug | 1 | XPNPEP1 |
| D | Druggable family + AlphaFold only, no drug | 0 | |
| E | Difficult family or no structure, no drug | 3 | UBL3, ADD3, HOXC13 |
Undrugged target profiles
4 cohort genes are undrugged. Ranked by ‘starting-point quality’ (assay depth + drugged-partner adjacency).
| Symbol | ChEMBL assays | Drugged partners (top 3) |
|---|---|---|
| UBL3 | 0 | — |
| XPNPEP1 | 10 | — |
| ADD3 | 0 | — |
| HOXC13 | 0 | — |
Clinical trials & evidence
Clinical trials
Clinical trials: 62.
Phase distribution (across all retrieved trials)
| Phase | Trials |
|---|---|
| Not specified | 42 |
| PHASE2 | 5 |
| PHASE1 | 5 |
| PHASE3 | 4 |
| PHASE1/PHASE2 | 2 |
| EARLY_PHASE1 | 2 |
| PHASE4 | 1 |
| PHASE2/PHASE3 | 1 |
Top trials by phase / activity
| NCT | Phase | Status | Title |
|---|---|---|---|
| NCT05783518 | PHASE4 | UNKNOWN | Effect of Desflurane on Pediatric Acute Respiratory Distress Syndrome After Living Donor Liver Transplant Recipients |
| NCT04336722 | PHASE3 | ACTIVE_NOT_RECRUITING | Efficacy and Safety of Odevixibat in Children With Biliary Atresia Who Have Undergone a Kasai HPE (BOLD) |
| NCT05426733 | PHASE3 | ENROLLING_BY_INVITATION | An Open-label Extension Study to Evaluate Long-term Efficacy and Safety of Odevixibat in Children With Biliary Atresia |
| NCT00539565 | PHASE3 | UNKNOWN | RCT of Steroids Following Kasai Portoenterostomy for Biliary Atresia. |
| NCT05521152 | PHASE3 | COMPLETED | Norepinephrine for Prevention of Intraoperative Hypotension in Infants Undergoing Kasai Portoenterostomy |
| NCT06121375 | PHASE2/PHASE3 | TERMINATED | Study to Assess Efficacy, Safety, Tolerability, Pharmacokinetics (PK), and Pharmacodynamics (PD) of Obeticholic Acid (OCA) Compared to Placebo in Pediatric Participants With Biliary Atresia, Post-hepatoportoenterostomy |
| NCT07513038 | PHASE1/PHASE2 | RECRUITING | Use of Indocyanine Green (ICG) for the Diagnosis of Biliary Atresia |
| NCT01774487 | PHASE2 | TERMINATED | Pentoxifylline Therapy in Biliary Atresia |
| NCT01854827 | PHASE1/PHASE2 | COMPLETED | Safety Study of Intravenous Immunoglobulin (IVIG) Post-Portoenterostomy in Infants With Biliary Atresia |
| NCT03499249 | PHASE2 | COMPLETED | N-Acetylcysteine in Biliary Atresia After Kasai Portoenterostomy |
| NCT04373941 | PHASE2 | UNKNOWN | Part II: Granulocyte-Colony Stimulating Factor Adjunct Therapy for Biliary Atresia |
| NCT04524390 | PHASE2 | COMPLETED | Evaluation of Maralixibat in Biliary Atresia Response Post-Kasai |
| NCT05321524 | PHASE2 | TERMINATED | Obeticholic Acid in Pediatric Subjects With Biliary Atresia |
| NCT02137668 | PHASE1 | RECRUITING | Treating Primary Sclerosing Cholangitis and Biliary Atresia With Vancomycin |
| NCT06260566 | PHASE1 | NOT_YET_RECRUITING | Tolerability of Enteral NAC in Infants |
| NCT07011199 | PHASE1 | NOT_YET_RECRUITING | Clinical Outcomes of Early Kasai Surgery With Umbilical Cord MSCs in Biliary Atresia |
| NCT01322386 | PHASE1 | COMPLETED | Gastrointestinal Microbiota in Primary Sclerosing Cholangitis and Biliary Atresia With Vancomycin |
| NCT05517317 | PHASE1 | COMPLETED | Autologous BMNC Infusion for Liver Cirrhosis in Children With BA |
| NCT07250854 | EARLY_PHASE1 | RECRUITING | The Use of Near-Infrared Fluorescence Cholangiography With Indocyanine Green (ICG) in the Work Up of Neonatal Cholestasis |
| NCT03395028 | EARLY_PHASE1 | COMPLETED | GCSF Adjunct Therapy for Biliary Atresia |
| NCT00061828 | Not specified | RECRUITING | A Prospective Database of Infants With Cholestasis |
| NCT00345553 | Not specified | RECRUITING | Biliary Atresia Study in Infants and Children |
| NCT01793168 | Not specified | RECRUITING | Rare Disease Patient Registry & Natural History Study - Coordination of Rare Diseases at Sanford |
| NCT03273049 | Not specified | RECRUITING | Mapping Disease Pathways for Biliary Atresia |
| NCT04272515 | Not specified | RECRUITING | Molecular Characterization for Understanding Biliary Atresia |
| NCT05072626 | Not specified | RECRUITING | High Medium-chain Triglyceride Nutritional Support in Infants With Biliary Atresia |
| NCT05399745 | Not specified | RECRUITING | BILACO Trial: Biliary Atresia - a Severe Complex Congenital Liver Disease |
| NCT05848310 | Not specified | RECRUITING | Preoperative Serum FGF19 in the Prognosis of Biliary Atresia |
| NCT05925309 | Not specified | RECRUITING | Preventive Effect of Prophylactic Oral Antibiotics Against Cholangitis After Kasai Portoenterostomy |
| NCT06184971 | Not specified | ACTIVE_NOT_RECRUITING | Biliary Atresia Research Network Northeast |
| NCT06564740 | Not specified | RECRUITING | Stem Cell Applications in Biliary Atresia Patients |
| NCT06708572 | Not specified | RECRUITING | Evaluation of the Use of Granulocyte Colony Stimulating Factor (GCSF) in Post Kasai Type 3 Biliary Atresia |
| NCT06764082 | Not specified | RECRUITING | Nutritional Intervention for Biliary Atresia |
| NCT07139717 | Not specified | NOT_YET_RECRUITING | Stool Card in Biliary Atresia |
| NCT00007033 | Not specified | COMPLETED | Study of Magnesium Sulfate in Children With Reduced Bone Density Secondary to Chronic Cholestatic Liver Disease |
| NCT00155194 | Not specified | UNKNOWN | Evaluation of Immune Function in Biliary Atresia Children With Prolonged Jaundice |
| NCT00166868 | Not specified | COMPLETED | Use of Probiotics to Prevent Cholangitis in Children With Biliary Atresia After the Kasai Portoenterostomy |
| NCT00294684 | Not specified | COMPLETED | A Randomized, Double-Blinded, Placebo-Controlled Trial of Corticosteroid Therapy Following Portoenterostomy |
| NCT01063699 | Not specified | COMPLETED | Survival With Own Liver of Conventional Versus Laparoscopic Kasai for Biliary Atresia |
| NCT01443572 | Not specified | COMPLETED | The Comparison of Desflurane and Sevoflurane on Postoperative Recovery and Hepatic Function of Biliary Atresia Patients During Kasai Operation |
Drugs tested across these trials (top 30)
| Molecule | Max phase | Trials referencing |
|---|---|---|
| DESFLURANE | 4 | 2 |
| INDOCYANINE GREEN ACID FORM | 4 | 2 |
| ODEVIXIBAT | 4 | 2 |
| URSODIOL | 4 | 2 |
| MARALIXIBAT | 4 | 1 |
| NEOMYCIN | 4 | 1 |
| NOREPINEPHRINE BITARTRATE | 4 | 1 |
| PENTOXIFYLLINE | 4 | 1 |
| FRAMYCETIN | 3 | 1 |
| CHEMBL3754093 | 0 | 1 |
| CHEMBL4299247 | 0 | 1 |
| CHEMBL5409583 | 0 | 1 |
| MAGNESIUM GLUCONATE | -1 | 1 |
Related Atlas pages
- Cohort genes: UBL3, XPNPEP1, ADD3, HOXC13
- Drugs: Desflurane, Indocyanine Green Acid Form, Odevixibat, Ursodiol, Maralixibat, Neomycin, Norepinephrine Bitartrate, Pentoxifylline, Framycetin