OncoSignal
Live from Open Targets Platform, fetched 2026-11-11 15:34 UTC. Every row links to its source record.

CD22 CD22 molecule

ENSG00000012124 · protein coding · Open Targets profile

Most highly expressed siglec (sialic acid-binding immunoglobulin-like lectin) on B-cells that plays a role in various aspects of B-cell biology including differentiation, antigen presentation, and trafficking to bone marrow (PubMed:34330755, PubMed:8627166). Binds to alpha 2,6-linked sialic acid residues of surface molecules such as CD22 itself, CD45 and IgM in a cis configuration. Can also bind to ligands on other cells as an adhesion molecule in a trans configuration (PubMed:20172905). Acts as an inhibitory coreceptor on the surface of B-cells and inhibits B-cell receptor induced signaling, characterized by inhibition of the calcium mobilization and cellular activation. Mechanistically, the immunoreceptor tyrosine-based inhibitory motif domain is phosphorylated by the Src kinase LYN, which in turn leads to the recruitment of the protein tyrosine phosphatase 1/PTPN6, leading to the negative regulation of BCR signaling (PubMed:8627166). If this negative signaling from is of sufficient strength, apoptosis of the B-cell can be induced (PubMed:20516366). {ECO:0000269|PubMed:20172905, ECO:0000269|PubMed:20516366, ECO:0000269|PubMed:34330755, ECO:0000269|PubMed:8627166}.

1 of the 11 drugs recorded against CD22 is approved, and 3 more reached Phase 3

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.

3 antibody drugs at Phase 3: EPRATUZUMAB, BECTUMOMAB, INOTUZUMAB2 antibody drugs at Phase 2: YTTRIUM Y 90 EPRATUZUMAB TETRAXETAN, YTTRIUM Y 90 EPRATUZUMAB1 antibody drug conjugate drug at Approved: INOTUZUMAB OZOGAMICIN2 antibody drug conjugate drugs at Phase 2: PINATUZUMAB VEDOTIN, EPRATUZUMAB-CYS-TESIRINE1 antibody drug conjugate drug at Withdrawn: MOXETUMOMAB PASUDOTOX1 unknown drug at Phase 2: BL221 unknown drug at Phase 1: MONO-DGA-RFB4Antibody 5Antibody drug conjugate 4Unknown 2Approved 1Phase 3 3Phase 2 5Phase 1 1Withdrawn 1

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 Withdrawn means the drug was pulled from the market or from development.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.

CD22: inherited and tumour-mutation evidence across 15 cancers

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)
00.250.50.751acute lymphoblastic leukemiaacute lymphoblastic leukemiahairy cell leukemiahairy cell leukemiaB-cell acute lymphoblastic leukemiaB-cell acute lymphoblastic leukemianon-Hodgkin lymphomanon-Hodgkin lymphomaprecursor B-cell acute lymphoblastic le…precursor B-cell acute lymphoblastic leukemialymphomalymphomafollicular lymphomafollicular lymphomamixed phenotype acute leukemiamixed phenotype acute leukemiadiffuse large B-cell lymphomadiffuse large B-cell lymphomaB-cell chronic lymphocytic leukemiaB-cell chronic lymphocytic leukemialeukemialeukemialymphoblastic lymphomalymphoblastic lymphomaesophageal squamous cell carcinomaesophageal squamous cell carcinomatriple-negative breast carcinomatriple-negative breast carcinomaWaldenstrom macroglobulinemiaWaldenstrom macroglobulinemia

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

Small molecule
High-Quality Ligand
Antibody
Approved Drug, UniProt loc high conf, GO CC high conf, UniProt SigP or TMHMM
PROTAC
Database Ubiquitination, Half-life Data, Small Molecule Binder
Other modalities
Approved Drug

gnomAD loss of function constraint: o/e 0.5386599898338318 (upper bound 0.6802099943161011). 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 52 registry trials, updated in the last three years, of the most advanced drugs against CD22 (inotuzumab ozogamicin, epratuzumab, bectumomab, inotuzumab, yttrium y 90 epratuzumab tetraxetan, BL22, pinatuzumab vedotin), ranked by Phase 2+ trials. Live from ClinicalTrials.gov.

17 of 47 trials of drugs against CD22 have sites only in United States

Registry trials of inotuzumab ozogamicin, epratuzumab, bectumomab, inotuzumab, yttrium y 90 epratuzumab tetraxetan, BL22, pinatuzumab vedotin 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; 36 of 47 have all sites in one country.

Sites only in this groupSites here and elsewhere
United StatesUnited States: 17 trials with sites only hereUnited States: 7 trials with sites here and elsewhere24ChinaChina: 13 trials with sites only hereChina: 0 trials with sites here and elsewhere13EuropeEurope: 6 trials with sites only hereEurope: 4 trials with sites here and elsewhere10JapanJapan: 0 trials with sites only hereJapan: 1 trials with sites here and elsewhere1OtherOther: 1 trials with sites only hereOther: 10 trials with sites here and elsewhere11

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. 5 trials list no sites and are left out. Source: ClinicalTrials.gov, fetched live.

25 trials of drugs against CD22 were stopped early; 7 give no reason

Terminated, withdrawn and suspended interventional trials of inotuzumab ozogamicin, epratuzumab, bectumomab, inotuzumab, yttrium y 90 epratuzumab tetraxetan, BL22, pinatuzumab vedotin, yttrium y 90 epratuzumab, epratuzumab-cys-tesirine, mono-dga-rfb4, 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 25 most recent of 25.

  • terminated · 2026-07-30 · M.D. Anderson Cancer Center · Inotuzumab Ozogamicin
    “the study was closed early due to competing trials”
  • withdrawn · 2026-06-24 · Nantes University Hospital · 90Y-DOTA-Epratuzumab IgG/Epratuzumab IgG
    No reason given
  • suspended · 2026-05-29 · The First Affiliated Hospital of Soochow University · matched by the registry's drug synonyms
    “According to the new regulations of China, newly launched clinical trials involved CAR-T cells must be apporved first by China National Center for Biotechology Development.”
  • terminated · 2026-04-15 · M.D. Anderson Cancer Center · Inotuzumab Ozogamicin
    “<75% participation”
  • terminated · 2026-02-12 · St. Jude Children's Research Hospital · Inotuzumab ozogamicin
    “Closed due to slow accrual”
  • terminated · 2025-12-12 · M.D. Anderson Cancer Center · matched by the registry's drug synonyms
    “<75% participation”
  • terminated · 2025-09-05 · M.D. Anderson Cancer Center · matched by the registry's drug synonyms
    “PI Request. Slow accrual and lack of clinical interest”
  • withdrawn · 2022-01-28 · Roswell Park Cancer Institute · Inotuzumab Ozogamicin
    “no accrual”
  • terminated · 2021-08-19 · Gilead Sciences · Epratuzumab (hLL2- anti-CD22 humanized antibody)
    “low accrual”
  • withdrawn · 2021-08-18 · Gilead Sciences · Veltuzumab and 90Y-Epratuzumab Tetraxetan, 90Y-epratuzumab tetraxetan
    “No subjects enrolled”
  • terminated · 2021-08-16 · Gilead Sciences · hLL2 (epratuzumab)
    “lack of accrual”
  • terminated · 2021-04-12 · M.D. Anderson Cancer Center · Inotuzumab Ozogamicin
    “the study was closed early due to competing trials”
  • withdrawn · 2020-07-09 · Novartis Pharmaceuticals · Inotuzumab
    “Novartis is no longer pursuing this study because of planned investigation of novel CAR-T therapies in this patient population.”
  • terminated · 2019-01-08 · Pfizer · Inotuzumab ozogamicin
    “The study was terminated prematurely on May 16, 2013, for futility. No new or unexpected safety issues were identified.”
  • terminated · 2018-02-22 · Weill Medical College of Cornell University · 90Y-epratuzumab tetraxetan
    “closed to enrollment due to slow patient accrual”
  • terminated · 2018-01-09 · Pfizer · inotuzumab ozogamicin
    “See termination reason in detailed description.”
  • withdrawn · 2017-01-19 · Nantes University Hospital · 90Y-epratuzumab tetraxetan
    No reason given
  • terminated · 2015-10-29 · National Cancer Institute (NCI) · BL22 (CAT-3888)
    “The supply of BL22 has expired and MedImmune the sponsor is not interested in producing any new supply.”
  • withdrawn · 2015-04-28 · National Cancer Institute (NCI) · BL22 immunotoxin
    No reason given
  • terminated · 2014-05-22 · M.D. Anderson Cancer Center · Epratuzumab
    “Slow accrual”
  • withdrawn · 2014-05-21 · UCB Pharma · Epratuzumab
    No reason given
  • terminated · 2012-06-07 · UCB Pharma · Epratuzumab
    No reason given
  • terminated · 2012-04-03 · UCB Pharma · epratuzumab
    No reason given
  • terminated · 2011-11-08 · UCB Pharma · epratuzumab
    No reason given
  • suspended · 2007-12-28 · MedImmune LLC · BL22 immunotoxin
    “protocol development and Amended protocol revision”
Paediatric incentives and obligations for CD22's drugs

For inotuzumab ozogamicin, epratuzumab, bectumomab, inotuzumab, yttrium y 90 epratuzumab tetraxetan, BL22, pinatuzumab vedotin, yttrium y 90 epratuzumab, epratuzumab-cys-tesirine, mono-dga-rfb4: 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: yes · CD22 is on the list. Membership alone neither requires nor waives a pediatric study.
  • EU paediatric investigation plan: yes · EMEA-001429-PIP01-13-M07 (Inotuzumab ozogamicin, Treatment of B cell acute lymphoblastic leukaemia): PM: decision on the application for modification of an agreed PIP, 10 Mar 2023; EMEA-001295-PIP01-12-M01 (Epratuzumab, Treatment of Systemic Lupus Erythematosus (SLE)): PM: decision on the application for modification of an agreed PIP, 5 Jun 2015
    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: yes · EU/3/13/1127 positive 7 Jun 2013: Treatment of B-cell acute lymphoblastic leukaemia
    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 EU/3/13/1127, 2026-11-11
  • Authorised in the EU: yes · Besponsa: authorised since 28 Jun 2017, orphan medicine
    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 Besponsa, 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: yes · Inotuzumab ozogamicin [Besponsa], 6 Mar 2024: Treatment of relapsed or refractory CD22-positive B-cell precursor acute lymphoblastic leukemia (ALL) in adult and pediatric patients 1 year and older
    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 · 33 interventional studies of inotuzumab ozogamicin, epratuzumab, bectumomab, inotuzumab, yttrium y 90 epratuzumab tetraxetan, bl22, pinatuzumab vedotin, yttrium y 90 epratuzumab, epratuzumab-cys-tesirine, mono-dga-rfb4 include patients under 18; 17 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 11 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
INOTUZUMAB OZOGAMICINAntibody drug conjugatephase 4acute lymphoblastic leukemia, neoplasm, B-cell acute lymphoblastic leukemia, non-Hodgkin lymphoma, mixed phenotype acute leukemia, precursor B-cell acute lymphoblastic leukemia, diffuse large B-cell lymphoma, lymphoma, +3 moreOpen Targets · ChEMBL
EPRATUZUMABAntibodyphase 3systemic lupus erythematosus, follicular lymphoma, non-Hodgkin lymphoma, Sjogren syndrome, acute lymphoblastic leukemia, Waldenstrom macroglobulinemia, diffuse large B-cell lymphoma, B-cell acute lymphoblastic leukemia, +1 moreOpen Targets · ChEMBL
BECTUMOMABAntibodyphase 3lymphomaOpen Targets · ChEMBL
INOTUZUMABAntibodyphase 3acute lymphoblastic leukemia, lymphomaOpen Targets · ChEMBL
YTTRIUM Y 90 EPRATUZUMAB TETRAXETANAntibodyphase 2diffuse large B-cell lymphoma, acute lymphoblastic leukemia, non-Hodgkin lymphoma, follicular lymphomaOpen Targets · ChEMBL
BL22Unknownphase 2hairy cell leukemia, non-Hodgkin lymphoma, B-cell chronic lymphocytic leukemia, acute lymphoblastic leukemia, prolymphocytic leukemiaOpen Targets · ChEMBL
PINATUZUMAB VEDOTINAntibody drug conjugatephase 2diffuse large B-cell lymphoma, non-Hodgkin lymphoma, follicular lymphoma, B-cell chronic lymphocytic leukemiaOpen Targets · ChEMBL
YTTRIUM Y 90 EPRATUZUMABAntibodyphase 1 2non-Hodgkin lymphomaOpen Targets · ChEMBL
EPRATUZUMAB-CYS-TESIRINEAntibody drug conjugatephase 1 2acute lymphoblastic leukemiaOpen Targets · ChEMBL
MONO-DGA-RFB4Unknownphase 1B-cell non-Hodgkin lymphomaOpen Targets · ChEMBL
MOXETUMOMAB PASUDOTOXAntibody drug conjugatewithdrawalhairy cell leukemia, neoplasm, lymphoblastic lymphoma, acute lymphoblastic leukemia, mantle cell lymphoma, follicular lymphoma, diffuse large B-cell lymphoma, B-cell chronic lymphocytic leukemia, +2 moreOpen Targets · ChEMBL