A Phase 1/2 interventional study of CART84 in Acute Myeloblastic Leukaemia and Leukemia, T-Cell, sponsored by Gyala Therapeutics. Recruiting at 2 sites in Spain. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-03-13.
Sponsored by Gyala Therapeutics · Phase 1/2, Interventional, and Treatment
This Phase I/IIa clinical study is testing an experimental treatment called GYA01 (CART84) for people with acute myeloid leukemia (AML) or T-cell acute lymphoblastic leukemia (T-ALL) whose disease has come back after treatment (relapsed) or did not respond to treatment (refractory).
GYA01 (CART84) is a type of CAR T-cell therapy. In this approach, a participant's own T cells (a type of immune cell) are collected and changed in a laboratory to help them better recognize and attack leukemia cells. The modified cells GYA01 (CART84) are then given back to the participant through an infusion into a vein.
The study is being done to:
Find a dose that can be given safely (Phase I) by treating small groups of participants with increasing dose levels and carefully monitoring side effects.
Look for early signs that GYA01 (CART84) may help control AML or T-ALL (Phase IIa).
Participants will be closely monitored for side effects and for changes in their leukemia after the infusion, and followed over time to understand safety and possible benefit.
AML and T-ALL are aggressive cancers, with poor prognosis with currently available therapies and significant unmet medical needs. Despite advancements in conventional therapies, relapse and refractory disease remain major challenges, necessitating innovative therapeutic approaches.
Chimeric antigen receptor (CAR) T-cell therapy has revolutionized the treatment of certain hematological malignancies and achieved excellent results in some cases and thus, there is robust rationale for expanding this therapeutic modality to R/R AML and T-ALL patients.
CD84 antigen is an immunoreceptor whose expression has been reported in certain immune cells and in B-cell malignancies. CD84 is overexpressed in AML and has been identified as a promising target for immunotherapy approaches, particularly CAR T-cell therapy. Although CD84 has been more extensively studied in the context of AML, it is a promising CAR T target for the treatment of several hematological malignancies.
Recently, CART84 cells were successfully expanded in vitro and exerted high cytotoxicity towards cell lines from different hematological malignancies, including AML and T-ALL. These findings suggest that CART84 cells may be a promising therapeutic option for patients with these diseases.
As such, this study is planned as a Phase I and Phase IIa trial, where the primary objective of Phase I is to evaluate the safety of CART84 cell therapy in patients with R/R AML and to determine the candidate dose for Phase II, where the clinical efficacy of CART84 at the recommended phase II dose (RP2D) level will be evaluated in AML and T-ALL patients.
3,667 studies on the registry are indexed under Leukemia, Myeloid, Acute; 816 are open to participants now.
This study's planned enrollment of 33 is below the median of 40 across 3,005 interventional studies indexed under Leukemia, Myeloid, Acute.
Browse Leukemia, Myeloid, Acute studies →This is the only study on the registry with Gyala Therapeutics as lead sponsor.
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Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Diagnosed with AML or T-ALL with ≥5% blasts in BM and/or PB at screening, without any approved therapeutic alternative and one of the following:
Adequate renal, hepatic, pulmonary, and cardiac function defined as:
Exclusion Criteria:
The following medications are excluded:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Relapsed and refractory
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Allogeneic and autologous transplant
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Postmenopausal
Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Creatinine clearance (CrCl)
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
LVEF (left ventricular ejection fraction)
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
NYHA class (heart failure)
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GVHD (graft-versus-host disease)
After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Drug: CART84
GYA01 (CART84): autologous cell-based product containing CD3+ T cells transduced with a lentiviral vector expressing an anti-CD84 chimeric antigen receptor (CAR).
Number of Participants with Adverse Events.
Primary Outcome Measure Phase I and Secondary Outcome Measure Phase II: Frequency and severity of adverse events (AEs) and serious AEs (SAEs) occurring after CART84 infusion using the Common Terminology Criteria for Adverse Events (CTCAE) version 5.0 and American Society for Transplantation and Cellular Therapy (ASTCT) grading for CRS/ICANS.
Time frame: 2 years
Proportion of patients achieving ORR after first infusion of CART84
Primary Outcome Measure Phase II and Secondary Outcome Measure Phase I: Proportion of patients achieving ORR at day 30 after first infusion of CART84 as assessed by European Leukemia Net (ELN) 2022 guidelines
Time frame: 30 days
Proportion of patients achieving late ORR
Phases I \& II: Proportion of patients achieving late ORR, defined as a response occurring after day 30 and up to day 90, provided that no other therapy has been administered
Time frame: day 90
Proportion of patients achieving measurable residual disease (MRD)-negative remission in bone marrow
Phase I: Proportion of patients achieving measurable residual disease (MRD)-negative remission in bone marrow (BM) by polymerase chain reaction (PCR) and/or flow cytometry at day 30.
Time frame: day 30
Proportion of CART84-infused patients undergoing allo-HSCT
Phases I \& II: Proportion of CART84-infused patients undergoing allo-HSCT and achieving hematopoietic donor engraftment.
Time frame: 6 months
Proportion of patients with detectable CART84 cells
Phase I \& II: Proportion of patients with detectable CART84 cells by PCR in peripheral blood and/or bone marrow (BM) at day 30 and day 90 following CART84 infusion, comparing those who proceed to allo-HSCT versus those who do not at the last follow-up.
Time frame: Day 30 and Day 90
Proportion of enrolled patients for whom a CART84 product can be manufactured and administered as per protocol.
Phases I \& II: Proportion of enrolled patients for whom a CART84 product can be manufactured and administered as per protocol.
Time frame: 3 months
Proportion of patients achieving MRD-negative remission
Phase II: Proportion of patients achieving MRD-negative remission, CR, duration of response (DoR) according to allo-HSCT (at day 30,6, 12 and 24 months following CART84 infusion), relapse-free survival (RFS), event-free survival (EFS), overall survival (OS).
Time frame: 24 months
Incidence of CD84-negative relapse.
Phase II: Incidence of CD84-negative relapse.
Time frame: 2 years
Hematologic recovery, based on serial peripheral blood counts after CART84 infusion.
Phase II: Hematologic recovery, based on serial peripheral blood counts after CART84 infusion.
Time frame: 90 days
Description of allo-HSCT procedures
Phase II: Description of allo-HSCT procedures (donor type, conditioning, stem-cell source, GvHD prophylaxis) and related complications: graft failure, incidence and grading of acute and chronic GvHD, infection, other organ-related toxicities such as SOS, cardiotoxicity, or non-relapse mortality (NRM) with all associated causes.
Time frame: 3 months
Plan to share: Yes — At the end of study SAP, OCF, CSR \& Programming code will be shared
Supporting information: Statistical analysis plan, Clinical study report, Analytic code
Time frame: At the end of the study
Access criteria: The documents will be uploaded to this website
Data sharing details ↗ · clinicaltrials.gov
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