IL5

Chr 5

interleukin 5

Also known as: EDF, IL-5, TRF

This gene encodes a cytokine that acts as a growth and differentiation factor for both B cells and eosinophils. The encoded cytokine plays a major role in the regulation of eosinophil formation, maturation, recruitment and survival. The increased production of this cytokine may be related to pathogenesis of eosinophil-dependent inflammatory diseases. This cytokine functions by binding to its receptor, which is a heterodimer, whose beta subunit is shared with the receptors for interleukine 3 (IL3) and colony stimulating factor 2 (CSF2/GM-CSF). This gene is located on chromosome 5 within a cytokine gene cluster which includes interleukin 4 (IL4), interleukin 13 (IL13), and CSF2 . This gene, IL4, and IL13 may be regulated coordinately by long-range regulatory elements spread over 120 kilobases on chromosome 5q31. [provided by RefSeq, Jul 2013]

33
ClinVar variants
14
Pathogenic / LP
0.01
pLI score
12
Active trials
Clinical SummaryIL5
Population Constraint (gnomAD)
Low constraint (pLI 0.01) — loss-of-function variants are relatively tolerated in the population.
📋
ClinVar Variants
14 Pathogenic / Likely Pathogenic· 12 VUS of 33 total submissions
💊
Clinical Trials
12 active or recruiting trials — potential therapeutic options may be available

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint?LOEUF (Loss-of-function Observed/Expected Upper bound Fraction) is the upper bound of the 90% CI for LoF OE — the preferred gnomAD v4 metric. Lower = more intolerant to LoF. LOEUF < 0.35 = highly constrained.
1.46LOEUF
pLI 0.006
Z-score 0.81
OE 0.65 (0.321.46)
Tolerant

Highly tolerant — LoF variants common in population

Missense Constraint?Missense Z-score: standard deviations fewer missense variants observed vs. expected. Z > 3.09 (p < 0.001) = gene does not tolerate missense variation. OE missense < 0.6 is also considered constrained.
-0.11Z-score
OE missense 1.04 (0.861.26)
72 obs / 69.4 exp
Tolerant

Tolerant to missense variation

Observed / Expected Ratios?Shaded band = 90% confidence interval. Vertical tick = point estimate. Grey threshold line = gnomAD constraint cutoff for that variant class.
LoF OE?Ratio of observed to expected LoF variants. Upper CI bound (LOEUF) ≤ 0.35 = strong LoF constraint signal.0.65 (0.321.46)
00.351.4
Missense OE?Ratio of observed to expected missense variants. OE ≤ 0.6 = fewer missense variants than expected by chance.1.04 (0.861.26)
00.61.4
Synonymous OE?Control metric — synonymous variants are largely neutral and expected near OE = 1.0. Significant deviation may indicate annotation issues.1.01
01.21.6
LoF obs/exp: 4 / 6.2Missense obs/exp: 72 / 69.4Syn Z: -0.04

ClinVar Variant Classifications

33 submitted variants in ClinVar

Classification Summary

Pathogenic13
Likely Pathogenic1
VUS12
Likely Benign3
Benign4
13
Pathogenic
1
Likely Pathogenic
12
VUS
3
Likely Benign
4
Benign

Curated Variants Distribution

Classified variants from ClinVar · 5 ACMG categories

ClassificationLoFMissense + InframeNon-codingSynonymousTotal
Pathogenic
0
0
13
0
13
Likely Pathogenic
0
0
1
0
1
VUS
0
10
2
0
12
Likely Benign
0
2
1
0
3
Benign
0
0
1
3
4
Total01218333

LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly

View in ClinVar →

Protein Context — Lollipop Plot

IL5 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

OMIM — Genotype-Phenotype Relationships

1 OMIM entry

INTERLEUKIN 5; IL5
MIM #147850 · *
Clinical Literature
Landmark / reviewRecent case evidence
Key Publications
Landmark & review papers · by relevance
PubMed
Asthma Phenotypes and Biomarkers.
Grunwell JR et al.·Respir Care
2025Review
Treatment options in type-2 low asthma.
Hinks TSC et al.·Eur Respir J
2021Review
Targeting key proximal drivers of type 2 inflammation in disease.
Gandhi NA et al.·Nat Rev Drug Discov
2016Review
Role of IL-5 in asthma and airway remodelling.
AbuJabal R et al.·Clin Exp Allergy
2024Review
Molecular Targets for Biological Therapies of Severe Asthma.
Pelaia C et al.·Front Immunol
2020Review
Top 10 resultsSearch PubMed ↗

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

Multiple SclerosisSpasticity

miR-142-3p as Potential Biomarker of Synaptopathy in MS

RECRUITING
NCT03999788Phase NANeuromed IRCCSStarted 2019-12-10
lumbar puncture and blood withdrawalIntermittent theta burst stimulation (iTBS) therapeutic protocol for spasticity
DysferlinopathyMiyoshi MyopathyLGMDR2

Clinical, Immunological, Morphological and Genetic Characteristics of Patients With Dysferlinopathy (LGMD R2) in the RF

ENROLLING BY INVITATION
NCT04824040Artgen BiotechStarted 2020-01-15
Chronic Rhinosinusitis With Nasal Polyps

th2 Modulation CRSwNP

NOT YET RECRUITING
NCT06107101Phase PHASE4St. Paul's Sinus CentreStarted 2024-06-01
Mepolizumab
PsoriasisInflammation

Regulation of Inflammatory Genes in Psoriasis

RECRUITING
NCT03125655University of Alabama at BirminghamStarted 2014-04-22
Inflammatory markers
EosinophiliaHypereosinophilic Syndrome

Natural History of Hypereosinophilia and Hypereosinophilic Syndromes

RECRUITING
NCT04018118University Hospital, LilleStarted 2019-05-06
Biological sample
Non-Allergic Rhinitis With Eosinophilia Syndrome

Efficacy and Safety of Stapokibart in Non-Allergic Rhinitis With Eosinophilia Syndrome

NOT YET RECRUITING
NCT07240376Phase NAHuazhong University of Science and TechnologyStarted 2025-11-25
Stapokibart (CM310)Placebo
Incisional Ventral Hernia

Cytokine Response to Abdominal Wall Reconstruction

RECRUITING
NCT07422584Northwestern UniversityStarted 2026-02-03
Not applicable- observational study
Heart FailureDilated Cardiomyopathy

Myocardial Telomere Recapping Study for Dilated Cardiomyopathy

ACTIVE NOT RECRUITING
NCT05837143Phase EARLY_PHASE1Shanghai East HospitalStarted 2023-03-30
JV001
Endometriosis

Developing a Complex ex Vivo Endometrial Tissue Model to Improve Endometriosis Care

RECRUITING
NCT06331676Phase NAHospices Civils de LyonStarted 2024-06-21
Tissue collectionData collection
Ulcerative Colitis

Multi-Strain Probiotics Supplementation With Standard Care in Mild to Moderate Ulcerative Colitis

RECRUITING
NCT06595719Phase NANational University of MalaysiaStarted 2024-02-23
Multi-Strain ProbioticsPlacebo
EGPA - Eosinophilic Granulomatosis With Polyangiitis

eGPA and Local Inflammation Within the Ear, Nose and Throat Area

RECRUITING
NCT06298448University Medical Center GroningenStarted 2024-02-14
laboratory experiments before and after mepolizumab treatment
Chronic Airway InflammationAsthmaChronic Obstructive Pulmonary Disease

Respiratory Microbiota, Infection Characteristics and Imaging Manifestations in Patients With Chronic Airway Inflammation

NOT YET RECRUITING
NCT06938022First Affiliated Hospital of Ningbo UniversityStarted 2025-04-15