IL15RA interleukin 15 receptor subunit alpha
ENSG00000134470 · protein coding · Open Targets profile
High-affinity receptor for interleukin-15 (PubMed:8530383). Can signal both in cis and trans where IL15R from one subset of cells presents IL15 to neighboring IL2RG-expressing cells (By similarity). In neutrophils, binds and activates kinase SYK in response to IL15 stimulation (PubMed:15123770). In neutrophils, required for IL15- induced phagocytosis in a SYK-dependent manner (PubMed:15123770). Expression of different isoforms may alter or interfere with signal transduction (PubMed:10480910). {ECO:0000250|UniProtKB:Q60819, ECO:0000269|PubMed:10480910, ECO:0000269|PubMed:15123770, ECO:0000269|PubMed:8530383}.
Each band is a group of drugs. It runs from the kind of drug on the left to the furthest stage that drug has reached in any disease on the right. Thicker bands mean more drugs.
Approved bands are highlighted. Withdrawn means the drug was pulled from the market or from development. A combined phase counts as the later one (Phase 1/2 is shown as Phase 2). Hover a band for the drug names. Source: Open Targets Platform, fetched live.
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.
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
- UniProt loc high conf, GO CC high conf, UniProt SigP or TMHMM, Human Protein Atlas loc
- PROTAC
- Small Molecule Binder
- Other modalities
- Advanced Clinical
gnomAD loss of function constraint: o/e 1.0736000537872314 (upper bound 1.4896999597549438). 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 24 registry trials, updated in the last three years, of the most advanced drugs against IL15RA (nogapendekin alfa inbakicept, recombinant human interleukin-15), ranked by Phase 2+ trials. Live from ClinicalTrials.gov.
- Jayson GarmizoAssociate Director, Clinical Operations · 2 of 2 trials Phase 2+
- Ajay BansalUniversity of Kansas · 1 of 1 trials Phase 2+
- Giordano Fabricio Cittolin SantosWashington University School of Medicine · 1 of 1 trials Phase 2+
- Lennie SenderImmunityBio, Inc. · 1 of 1 trials Phase 2+
- David ShookNkarta, Inc. · 0 of 2 trials Phase 2+
- Jibran AhmedNational Cancer Institute (NCI) · 0 of 1 trials Phase 2+
- Rochelle EmerySenti Biosciences, Medical Director · 0 of 1 trials Phase 2+
- Rosandra N KaplanNational Cancer Institute (NCI) · 0 of 1 trials Phase 2+
- Seth M PollackNorthwestern University · 0 of 1 trials Phase 2+
- Tim SchackerUniversity of Minnesota · 0 of 1 trials Phase 2+
Registry trials of nogapendekin alfa inbakicept, recombinant human interleukin-15 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; 12 of 17 have all sites in one country.
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. 7 trials list no sites and are left out. Source: ClinicalTrials.gov, fetched live.
9 trials of drugs against IL15RA were stopped early
Terminated, withdrawn and suspended interventional trials of nogapendekin alfa inbakicept, recombinant human interleukin-15, 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 9 most recent of 9.
- withdrawn · 2026-08-28 · ImmunityBio, Inc. · Nogapendekin Alfa Inbakicept (N803)“The sponsor has changed the development plans which is not for safety reasons.”
- withdrawn · 2026-06-22 · ImmunityBio, Inc. · Drug: Nogapendekin alfa inbakicept (NAI)“Sponsor decision”
- terminated · 2026-05-26 · ImmunityBio, Inc. · Nogapendekin alfa inbakicept (NAI) + Nivolumab + Ipilimumab + Carboplatin + Nab-paclitaxel“There are no longer active subjects on QUILT-2.023. Data will be entered into clinicaltrials.gov within 1 year of the primary completion date.”
- withdrawn · 2026-05-08 · ImmunityBio, Inc. · Nogapendekin alfa inbakicept (NAI)“New protocol developed”
- withdrawn · 2026-05-08 · ImmunityBio, Inc. · matched by the registry's drug synonyms“New protocol developed”
- terminated · 2022-05-17 · National Cancer Institute (NCI) · matched by the registry's drug synonyms“This study was terminated early due to manufacturer withdrawal of support (study medication) due to lack of enrollment.”
- terminated · 2022-03-22 · National Cancer Institute (NCI) · matched by the registry's drug synonyms“The study was closed after > 1 year of inactivity.”
- terminated · 2019-07-08 · Mackay Memorial Hospital · matched by the registry's drug synonyms“slow recruitment and high drop-out rate”
- terminated · 2015-01-27 · National Cancer Institute (NCI) · matched by the registry's drug synonyms“Closed this protocol due to autoimmune toxicity.”
Paediatric incentives and obligations for IL15RA's drugs
For nogapendekin alfa inbakicept, recombinant human interleukin-15: 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.
- FDA pediatric target list: no · IL15RA is not on the listRule: Target is on FDA's Pediatric Molecular Target List (relevant targets). Source: FDA Pediatric Molecular Target List (Listed as February 2026 on the FDA Pediatric Oncology page; the file served is 9.7.22_the_relevant_molecular_target_list.xlsx, whose Summary of Changes sheet is headed 'SEPTEMBER 2022 UPDATE' (footnote date 2022-09-01)), 2026-11-11
- EU paediatric investigation plan: no · No EMA paediatric investigation plan decision names nogapendekin alfa inbakicept, recombinant human interleukin-15Rule: 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 nogapendekin alfa inbakicept, recombinant human interleukin-15Rule: 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 · Anktiva: authorised since 16 Feb 2026, conditionalRule: 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 Anktiva, 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 linkRule: 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 nogapendekin alfa inbakicept, recombinant human interleukin-15Rule: 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 · 1 interventional studies of nogapendekin alfa inbakicept, recombinant human interleukin-15 include patients under 18; 0 are recruiting, not yet recruiting or activeRule: 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 2 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.