OncoSignal
Live from Open Targets Platform, fetched 2026-11-11 22:28 UTC. Every row links to its source record.

IL5RA interleukin 5 receptor subunit alpha

ENSG00000091181 · protein coding · Open Targets profile

Cell surface receptor that plays an important role in the survival, differentiation, and chemotaxis of eosinophils (PubMed:9378992). Acts by forming a heterodimeric receptor with CSF2RB subunit and subsequently binding to interleukin-5 (PubMed:1495999, PubMed:22528658). In unstimulated conditions, interacts constitutively with JAK2. Heterodimeric receptor activation leads to JAK2 stimulation and subsequent activation of the JAK-STAT pathway (PubMed:9516124). {ECO:0000269|PubMed:1495999, ECO:0000269|PubMed:22528658, ECO:0000269|PubMed:9378992, ECO:0000269|PubMed:9516124}.

In 1 of 15 cancers, the evidence for IL5RA comes mainly from inherited variants

Each row is a cancer, strongest overall evidence first. The two dots show how strong the inherited (germline) and tumour-mutation (somatic) evidence is; the line between them is the gap.

Inherited (germline) variantsMutations in tumours (somatic)
00.250.50.751nasal cavity polypnasal cavity polypovarian neoplasmovarian neoplasmovarian neoplasm: germline 0.25uveal melanomauveal melanomaacute myeloid leukemiaacute myeloid leukemiacentral nervous system cancercentral nervous system cancerpancreatic ductal adenocarcinomapancreatic ductal adenocarcinomaplasma cell myelomaplasma cell myelomapancreatic neoplasmpancreatic neoplasmleukemialeukemiabreast cancerbreast cancerlung carcinomalung carcinomalung adenocarcinomalung adenocarcinomasystemic mastocytosissystemic mastocytosisrhabdomyosarcomarhabdomyosarcomasmall cell lung carcinomasmall cell lung carcinoma

Scores run from 0 (no evidence) to 1 (strongest). A missing dot at 0 means Open Targets holds no evidence of that kind. Source: Open Targets Platform, fetched live.

Tractability

Antibody
Approved Drug, GO CC high conf, UniProt SigP or TMHMM

gnomAD loss of function constraint: o/e 0.9801499843597412 (upper bound 1.2436000108718872). Low values mean loss of function is poorly tolerated, a safety flag for inhibition.

Who runs trials of these drugs

Principal investigators and study chairs on 36 registry trials, updated in the last three years, of the most advanced drugs against IL5RA (benralizumab), ranked by Phase 2+ trials. Live from ClinicalTrials.gov.

10 of 36 trials of drugs against IL5RA have sites only in Europe

Registry trials of benralizumab updated in the last three years, counted by the country group of their listed sites. A trial with sites in several groups counts in each; 18 of 36 have all sites in one country.

Sites only in this groupSites here and elsewhere
United StatesUnited States: 5 trials with sites only hereUnited States: 16 trials with sites here and elsewhere21ChinaChina: 1 trials with sites only hereChina: 7 trials with sites here and elsewhere8EuropeEurope: 10 trials with sites only hereEurope: 16 trials with sites here and elsewhere26JapanJapan: 0 trials with sites only hereJapan: 9 trials with sites here and elsewhere9OtherOther: 3 trials with sites only hereOther: 17 trials with sites here and elsewhere20

Site counts are not patients per country, and trials registered only outside ClinicalTrials.gov are not covered. Where sites are is a fact about the record, not a judgement of its quality. Europe is the EU and EEA, the UK and Switzerland. Source: ClinicalTrials.gov, fetched live.

11 trials of drugs against IL5RA were stopped early

Terminated, withdrawn and suspended interventional trials of benralizumab, newest update first, live from ClinicalTrials.gov. Each reason is quoted exactly as the registry gives it; we do not sort reasons into safety, efficacy or business. Dates are the last registry update. Showing the 11 most recent of 11.

  • terminated · 2026-02-19 · AstraZeneca · Benralizumab 30 mg
    “The study has a double-blind period and an open-label period. The study did not meet its primary endpoints after the primary LSLV and the decision was taken to terminate the study early.”
  • terminated · 2025-07-20 · AstraZeneca · Benralizumab, Placebo to Benralizumab
    “Due to the decision to stop recruitment early, enrolment into the MAHALE trial was terminated in August 2022; 139 patients were screened and 100 randomised to IP.”
  • terminated · 2025-07-14 · AstraZeneca · Benralizumab
    “The study was terminated by the Sponsor based on emerging evidence in the pathology of eosinophilic upper gastrointestinal diseases. Recruitment for the study was terminated and only a small number of patients were recruited.”
  • terminated · 2024-11-29 · AstraZeneca · Benralizumab
    “Independent Data Monitoring Committee recommended terminating the study following a pre-planned analysis as the efficacy results did not meet the pre-defined futility guidelines. There were no new safety concerns identified from this analysis.”
  • terminated · 2024-08-29 · Memorial Sloan Kettering Cancer Center · Benralizumab
    “Limited amount of eligible participants”
  • terminated · 2024-03-13 · AstraZeneca · Benralizumab, Placebo and Benralizumab
    “Study did not meet primary endpoint”
  • withdrawn · 2024-01-08 · Charite University, Berlin, Germany · matched by the registry's drug synonyms
    “Financing has been withdrawn”
  • terminated · 2023-11-18 · AstraZeneca · Benralizumab
    “High-level results from the MESSINA Phase III trial showed that AstraZeneca's Fasenra (benralizumab) did not meet one of the two dual-primary endpoints. Given the lack of clear benefit in this patient population, study has been terminated.”
  • terminated · 2023-08-31 · AstraZeneca · Benralizumab, Placebo / Benralizumab
    “The study did not meet the primary endpoint.”
  • withdrawn · 2022-02-01 · Baylor Research Institute · matched by the registry's drug synonyms
    “Difficult to find eligible patients willing to participate.”
  • terminated · 2015-11-24 · AstraZeneca · Benralizumab
    “Study terminated due to sponsor decision”
Paediatric incentives and obligations for IL5RA's drugs

For benralizumab: what EMA and FDA publish about paediatric plans, orphan status and pediatric approvals, and how many registered studies take children. Each line is a yes, no or not published fact from the record linked under it; none of it is a forecast.

  • EU paediatric investigation plan: yes · EMA/PE/0000253868 (Benralizumab, Treatment of hypereosinophilic syndrome): PM: decision on the application for modification of an agreed PIP, 11 Jul 2025; EMA/PE/0000241178 (Benralizumab, Treatment of eosinophilic granulomatosis with polyangiitis): PM: decision on the application for modification of an agreed PIP, 10 Jul 2025; EMEA-001214-PIP07-21 (Benralizumab, Treatment of eosinophilic gastritis/eosinophilic gastroenteritis): P: decision agreeing on a investigation plan, with or without partial waiver(s) and or deferral(s), 31 Jan 2022; EMEA-001214-PIP01-11-M11 (Benralizumab, Treatment of asthma): PM: decision on the application for modification of an agreed PIP, 13 Apr 2022; +4 more
    Rule: An EMA PIP decision (agreement, modification or waiver) lists the drug as its active substance, exact name. Source: EMA data download (dated snapshot), 2026-11-11
  • EU orphan designation: no · No EU orphan designation names benralizumab
    Rule: An EU orphan designation lists the drug as its active substance (exact name) or belongs to a medicine that does; withdrawn and expired designations are listed with their status. Source: EMA data download (dated snapshot), 2026-11-11
  • Authorised in the EU: yes · Fasenra: authorised since 8 Jan 2018
    Rule: An EMA medicine record lists the drug as its active substance or INN, exact name; national-only authorisations are not in this file. Source: EMA EPAR Fasenra, 2026-11-11
  • FDA orphan designation: not published · FDA's orphan designation database turns away automated requests, so this app does not read it; search it by hand at the link
    Rule: Would be: an FDA orphan designation names the drug. Source: FDA orphan designations search
  • FDA pediatric oncology approval: no · FDA's table lists no pediatric approval of benralizumab
    Rule: FDA's Pediatric Oncology Drug Approvals table names the drug. Source: FDA Pediatric Oncology Drug Approvals (content current as of 2026-03-03), 2026-11-11
  • Registered studies open to children: yes · 17 interventional studies of benralizumab include patients under 18; 4 are recruiting, not yet recruiting or active
    Rule: The registry's age group includes Child (birth to 17 years), which also counts studies that set no minimum age. Source: ClinicalTrials.gov search, 2026-11-11

Rare pediatric disease voucher. FDA, content current as of 29 Apr 2026: “As of February 3, 2026, enactment of the Consolidated Appropriations Act, 2026, the rare pediatric disease PRV program will sunset after September 30, 2029. FDA may not award any PRVs under this program after September 30, 2029.” Voucher sale prices are not shown here; they appear only as company-reported news. FDA: Rare Pediatric Disease Designation and Priority Review Voucher Programs

All 1 drugs and clinical candidates as a table

Each drug, stage and indication links to its Open Targets record, where the trials and approvals behind it are listed. Salt forms (for example a mesylate) are listed as Open Targets records them, as separate entries.

DrugTypeHighest stageIndicationsSource records
BENRALIZUMABAntibodyphase 4asthma, Airway obstruction, chronic obstructive pulmonary disease, Nasal polyposis, nasal cavity polyp, chronic rhinosinusitis with nasal polyps, eosinophilic granulomatosis with polyangiitis, hypereosinophilic syndrome, +10 moreOpen Targets · ChEMBL