A Phase 1/2 interventional study of tafasitamab and parsaclisib in Chronic Lymphocytic Leukemia and Non Hodgkin Lymphoma, sponsored by Incyte Corporation. Terminated at 50 sites in 7 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-02-04.
Sponsored by Incyte Corporation · Phase 1/2, Interventional, and Treatment
The purpose of this single-arm, open-label, Phase 1b/2a, multicenter basket study is to evaluate whether tafasitamab and parsaclisib can be safely combined at the recommended Phase 2 dose (RP2D) and dosing regimen that was established for each of the 2 compounds as a treatment option for adult participants with R/R B-cell malignancies.
1,603 studies on the registry are indexed under Leukemia, Lymphocytic, Chronic, B-Cell; 243 are open to participants now.
This study's enrollment of 54 is above the median of 40 across 1,325 interventional studies indexed under Leukemia, Lymphocytic, Chronic, B-Cell.
Browse Leukemia, Lymphocytic, Chronic, B-Cell studies →Incyte Corporation is the lead sponsor of 286 studies on the registry; 37 are open to participants now.
Of its 144 completed or terminated interventional studies of FDA-regulated products, 93 (65%) have results posted.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Participants will be assigned to disease specific cohorts based on the histology of their underlying disease. Cohort 1: R/R DLBCL Cohort 2: R/R MCL Cohort 3: R/R FL Cohort 4: R/R MZL Cohort 5: R/R CLL/SLL
Drug: tafasitamab · Drug: parsaclisib
tafasitamab will be administered at a protocol defined dose once a week for cycles 1-3 and every other week from cycle 4 until progression.
Also known as: INCMOR00208
parsaclisib will be administered at protocol defined dose for cycles 1 through disease progression.
Also known as: INCB050465
Number of Participants With Any Treatment-emergent Adverse Event (TEAE )
An adverse event (AE) is any untoward medical occurrence associated with the use of a drug in humans, whether or not it is considered drug related. An AE can therefore be any unfavorable or unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of study treatment. A TEAE is any AE either reported for the first time or the worsening of a pre-existing event after the first dose of study drug until 90 days after the last dose of study drug.
Time frame: up to 1092 days
Number of Participants With Any ≥Grade 3 TEAE
An AE is any untoward medical occurrence associated with the use of a drug in humans, whether or not it is considered drug related. A TEAE is any AE either reported for the first time or the worsening of a pre-existing event after the first dose of study drug until 90 days after the last dose of study drug. The severity of AEs was assessed using CTCAE v5.0 Grades 1 through 5. Grade 1: mild; asymptomatic or mild symptoms; clinical or diagnostic observations only; treatment not indicated. Grade 2: moderate; minimal, local, or noninvasive treatment indicated; limiting age-appropriate activities of daily living. Grade 3: severe or medically significant but not immediately life-threatening; hospitalization or prolongation of hospitalization indicated; disabling; limiting self-care activities of daily living. Grade 4: life-threatening consequences; urgent treatment indicated. Grade 5: fatal.
Time frame: up to 1092 days
Number of Participants With Dose-limiting Toxicities (DLTs)
A DLT was defined as the occurrence of any protocol-defined toxicity up to and including Day 28 (Cycle 1/Day 28), except those with a clear alternative explanation.
Time frame: up to 28 days
Objective Response Rate Based on Investigator Assessment: Percentage of Participants With CR/CMR or PR/PMR According to Lugano Criteria for NHL and International Working Group for Chronic Lymphocytic Leukemia (iwCLL) Criteria for CLL
Lugano complete response/complete metabolic response (CR/CMR): target nodes/masses of lymph nodes/extralymphatic sites (LNs/ELSs) regressed to ≤1.5 cm; no non-measured lesions; organ enlargement regressed to normal; no new lesions (NNLs); normal bone marrow. Lugano partial response/partial metabolic response (PR/PMR): LNs/ELSs, ≥50% decrease in the product of perpendicular diameters sum for multiple lesions; no/regressed non-measured lesions, no increase; organ enlargement; NNLs. iwCLL CR: no LNs ≥1.5 cm; spleen size \<13 cm/liver size normal; no constitutional symptoms; normal circulating lymphocyte count (CLC); ≥100 × 10\^9 platelets/L; hemoglobin ≥11 g/dL; normocellular, no CLL cells, no B-lymphoid nodules in marrow. iwCLL PR decrease of ≥50% in lymph nodes, liver and/or spleen, and CLC from baseline; constitutional symptoms; ≥100 × 10\^9 platelets/L or increase of ≥50% over baseline in platelet count and hemoglobin; presence of CLL cells, or of B-lymphoid nodules, or not done.
Time frame: up to 1002 days
Cmax of Tafasitamab When Given in Combination With Parsaclisib
Cmax was defined as the maximum observed plasma or serum concentration of tafasitamab.
Time frame: Cycle 1 Day 1; before tafasitamab infusion (predose); immediately after tafasitamab infusion; 1 hour and 4 hours post-infusion
Tmax of Tafasitamab When Given in Combination With Parsaclisib
tmax was defined as the time to the maximum concentration of tafasitamab.
Time frame: Cycle 1 Day 1; before tafasitamab infusion (predose); immediately after tafasitamab infusion; 1 hour and 4 hours post-infusion
AUClast of Tafasitamab When Given in Combination With Parsaclisib
AUClast was defined as the area under the plasma concentration-time curve from time zero to the time of the last measurable concentration.
Time frame: Cycle 1 Day 1; before tafasitamab infusion (predose); immediately after tafasitamab infusion; 1 hour and 4 hours post-infusion
AUC0-inf of Tafasitamab When Given in Combination With Parsaclisib
AUC0-inf was defined as the area under the plasma concentration-time curve from time zero to infinity (time that the drug is no longer present in the body).
Time frame: Cycle 1 Day 1; before tafasitamab infusion (predose); immediately after tafasitamab infusion; 1 hour and 4 hours post-infusion
Clast of Tafasitamab When Given in Combination With Parsaclisib
AUC0-inf was defined as the last measurable plasma drug concentration.
Time frame: Cycle 1 Day 1; before tafasitamab infusion (predose); immediately after tafasitamab infusion; 1 hour and 4 hours post-infusion
t1/2 of Tafasitamab When Given in Combination With Parsaclisib
t1/2 was defined as the drug's elimination half-life, which is the time it takes for the concentration of a drug in the body to decrease by 50%.
Time frame: Cycle 1 Day 1; before tafasitamab infusion (predose); immediately after tafasitamab infusion; 1 hour and 4 hours post-infusion
CL of Tafasitamab When Given in Combination With Parsaclisib
CL was defined as the apparent total body clearance of drug from plasma.
Time frame: Cycle 1 Day 1; before tafasitamab infusion (predose); immediately after tafasitamab infusion; 1 hour and 4 hours post-infusion
VZ of Tafasitamab When Given in Combination With Parsaclisib
Vz was defined as the volume of distribution.
Time frame: Cycle 1 Day 1; before tafasitamab infusion (predose); immediately after tafasitamab infusion; 1 hour and 4 hours post-infusion
| Milestone | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL |
|---|---|---|---|---|---|
| Started | 15 | 11 | 21 | 3 | 4 |
| Completed | 0 | 0 | 0 | 0 | 0 |
| Not completed | 15 | 11 | 21 | 3 | 4 |
| Withdrew: Death | 9 | 7 | 4 | 0 | 1 |
| Withdrew: Lost to follow-up | 0 | 0 | 1 | 1 | 0 |
| Withdrew: Withdrawal by subject | 2 | 1 | 3 | 1 | 0 |
| Withdrew: Sponsor terminated collection of follow-up data | 3 | 2 | 10 | 1 | 2 |
| Withdrew: Medical decision due to worsening clinical condition | 1 | 0 | 0 | 0 | 0 |
| Withdrew: Transitioned to rollover protocol | 0 | 1 | 2 | 0 | 1 |
| Withdrew: Withdrawal per principal investigator; new treatment | 0 | 0 | 1 | 0 | 0 |
An adverse event (AE) is any untoward medical occurrence associated with the use of a drug in humans, whether or not it is considered drug related. An AE can therefore be any unfavorable or unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of study treatment. A TEAE is any AE either reported for the first time or the worsening of a pre-existing event after the first dose of study drug until 90 days after the last dose of study drug.
| Participants | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL |
|---|---|---|---|---|---|
| Number of Participants With Any Treatment-emergent Adverse Event (TEAE ) | 15 | 11 | 21 | 3 | 4 |
An AE is any untoward medical occurrence associated with the use of a drug in humans, whether or not it is considered drug related. A TEAE is any AE either reported for the first time or the worsening of a pre-existing event after the first dose of study drug until 90 days after the last dose of study drug. The severity of AEs was assessed using CTCAE v5.0 Grades 1 through 5. Grade 1: mild; asymptomatic or mild symptoms; clinical or diagnostic observations only; treatment not indicated. Grade 2: moderate; minimal, local, or noninvasive treatment indicated; limiting age-appropriate activities of daily living. Grade 3: severe or medically significant but not immediately life-threatening; hospitalization or prolongation of hospitalization indicated; disabling; limiting self-care activities of daily living. Grade 4: life-threatening consequences; urgent treatment indicated. Grade 5: fatal.
| Participants | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL |
|---|---|---|---|---|---|
| Number of Participants With Any ≥Grade 3 TEAE | 12 | 9 | 18 | 3 | 2 |
A DLT was defined as the occurrence of any protocol-defined toxicity up to and including Day 28 (Cycle 1/Day 28), except those with a clear alternative explanation.
| Participants | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL |
|---|---|---|---|---|---|
| Number of Participants With Dose-limiting Toxicities (DLTs) | 0 | 0 | 0 | 0 | 0 |
Lugano complete response/complete metabolic response (CR/CMR): target nodes/masses of lymph nodes/extralymphatic sites (LNs/ELSs) regressed to ≤1.5 cm; no non-measured lesions; organ enlargement regressed to normal; no new lesions (NNLs); normal bone marrow. Lugano partial response/partial metabolic response (PR/PMR): LNs/ELSs, ≥50% decrease in the product of perpendicular diameters sum for multiple lesions; no/regressed non-measured lesions, no increase; organ enlargement; NNLs. iwCLL CR: no LNs ≥1.5 cm; spleen size \<13 cm/liver size normal; no constitutional symptoms; normal circulating lymphocyte count (CLC); ≥100 × 10\^9 platelets/L; hemoglobin ≥11 g/dL; normocellular, no CLL cells, no B-lymphoid nodules in marrow. iwCLL PR decrease of ≥50% in lymph nodes, liver and/or spleen, and CLC from baseline; constitutional symptoms; ≥100 × 10\^9 platelets/L or increase of ≥50% over baseline in platelet count and hemoglobin; presence of CLL cells, or of B-lymphoid nodules, or not done.
| percentage of participants | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL |
|---|---|---|---|---|---|
| Objective Response Rate Based on Investigator Assessment: Percentage of Participants With CR/CMR or PR/PMR According to Lugano Criteria for NHL and International Working Group for Chronic Lymphocytic Leukemia (iwCLL) Criteria for CLL | 33.3 (11.8 to 61.6) | 81.8 (48.2 to 97.7) | 90.5 (69.6 to 98.8) | 33.3 (0.8 to 90.6) | 50.0 (6.8 to 93.2) |
Cmax was defined as the maximum observed plasma or serum concentration of tafasitamab.
| milligrams per liter (mg/L) | All Cohorts |
|---|---|
| Cmax of Tafasitamab When Given in Combination With Parsaclisib | 324.203 ± 112.746 |
tmax was defined as the time to the maximum concentration of tafasitamab.
| hours | All Cohorts |
|---|---|
| Tmax of Tafasitamab When Given in Combination With Parsaclisib | 3.963 ± 1.591 |
AUClast was defined as the area under the plasma concentration-time curve from time zero to the time of the last measurable concentration.
| hours x mg/L | All Cohorts |
|---|---|
| AUClast of Tafasitamab When Given in Combination With Parsaclisib | 31379.84 ± 12369.81 |
AUC0-inf was defined as the area under the plasma concentration-time curve from time zero to infinity (time that the drug is no longer present in the body).
| hours x mg/L | All Cohorts |
|---|---|
| AUC0-inf of Tafasitamab When Given in Combination With Parsaclisib | 54825.21 ± 29363.32 |
AUC0-inf was defined as the last measurable plasma drug concentration.
| mg/L | All Cohorts |
|---|---|
| Clast of Tafasitamab When Given in Combination With Parsaclisib | 114.386 ± 56.789 |
t1/2 was defined as the drug's elimination half-life, which is the time it takes for the concentration of a drug in the body to decrease by 50%.
| hours | All Cohorts |
|---|---|
| t1/2 of Tafasitamab When Given in Combination With Parsaclisib | 121.702 ± 49.506 |
CL was defined as the apparent total body clearance of drug from plasma.
| liter per hour | All Cohorts |
|---|---|
| CL of Tafasitamab When Given in Combination With Parsaclisib | 0.021 ± 0.015 |
Vz was defined as the volume of distribution.
| liters | All Cohorts |
|---|---|
| VZ of Tafasitamab When Given in Combination With Parsaclisib | 3.254 ± 1.694 |
Collected over up to 1092 days. Non-serious events are listed at a 5% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Cohort 1: R/R DLBCL | 9/15 (60%) | 6/15 (40%) | 15/15 (100%) |
| Cohort 2: R/R MCL | 7/11 (63.6%) | 7/11 (63.6%) | 11/11 (100%) |
| Cohort 3: R/R FL | 4/21 (19%) | 12/21 (57.1%) | 21/21 (100%) |
| Cohort 4: R/R MZL | 0/3 (0%) | 2/3 (66.7%) | 3/3 (100%) |
| Cohort 5: R/R CLL/SLL | 1/4 (25%) | 3/4 (75%) | 4/4 (100%) |
| Event | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL |
|---|---|---|---|---|---|
| COVID-19Infections and infestations | 1/15 | 4/11 | 0/21 | 0/3 | 0/4 |
| COVID-19 pneumoniaInfections and infestations | 1/15 | 0/11 | 3/21 | 1/3 | 0/4 |
| Supraventricular tachycardiaCardiac disorders | 0/15 | 0/11 | 0/21 | 1/3 | 0/4 |
| DiarrhoeaGastrointestinal disorders | 0/15 | 1/11 | 6/21 | 0/3 | 1/4 |
| NeutropeniaBlood and lymphatic system disorders | 0/15 | 0/11 | 0/21 | 0/3 | 1/4 |
| PyrexiaGeneral disorders | 1/15 | 2/11 | 0/21 | 0/3 | 1/4 |
| Clostridium difficile colitisInfections and infestations | 0/15 | 1/11 | 0/21 | 0/3 | 0/4 |
| HyponatraemiaMetabolism and nutrition disorders | 0/15 | 1/11 | 0/21 | 0/3 | 0/4 |
| Inappropriate antidiuretic hormone secretionEndocrine disorders | 0/15 | 1/11 | 0/21 | 0/3 | 0/4 |
| MalaiseGeneral disorders | 0/15 | 1/11 | 0/21 | 0/3 | 0/4 |
| Event | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL |
|---|---|---|---|---|---|
| NeutropeniaBlood and lymphatic system disorders | 7/15 | 6/11 | 11/21 | 3/3 | 0/4 |
| CoughRespiratory, thoracic and mediastinal disorders | 2/15 | 4/11 | 2/21 | 0/3 | 3/4 |
| DiarrhoeaGastrointestinal disorders | 4/15 | 2/11 | 11/21 | 2/3 | 2/4 |
| ThrombocytopeniaBlood and lymphatic system disorders | 0/15 | 7/11 | 3/21 | 0/3 | 1/4 |
| AnaemiaBlood and lymphatic system disorders | 2/15 | 4/11 | 2/21 | 0/3 | 2/4 |
| ArthralgiaMusculoskeletal and connective tissue disorders | 0/15 | 0/11 | 5/21 | 0/3 | 2/4 |
| AstheniaGeneral disorders | 5/15 | 3/11 | 6/21 | 1/3 | 2/4 |
| COVID-19Infections and infestations | 3/15 | 1/11 | 8/21 | 1/3 | 2/4 |
| Decreased appetiteMetabolism and nutrition disorders | 2/15 | 1/11 | 3/21 | 0/3 | 2/4 |
| AnxietyPsychiatric disorders | 0/15 | 0/11 | 0/21 | 1/3 | 0/4 |
| Age, Continuous(years) | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL | Total |
|---|---|---|---|---|---|---|
| Mean | 67.2 ± 15.47 | 68.9 ± 15.06 | 66.8 ± 8.03 | 65.7 ± 17.21 | 70.3 ± 5.74 | 67.5 ± 12.03 |
| Sex: Female, Male(Participants) | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL | Total |
|---|---|---|---|---|---|---|
| Female | 5 | 1 | 11 | 3 | 2 | 22 |
| Male | 10 | 10 | 10 | 0 | 2 | 32 |
| Ethnicity (NIH/OMB)(Participants) | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL | Total |
|---|---|---|---|---|---|---|
| Hispanic or Latino | 1 | 3 | 2 | 1 | 0 | 7 |
| Not Hispanic or Latino | 13 | 6 | 16 | 2 | 2 | 39 |
| Unknown or Not Reported | 1 | 2 | 3 | 0 | 2 | 8 |
| Race (NIH/OMB)(Participants) | Cohort 1: R/R DLBCL | Cohort 2: R/R MCL | Cohort 3: R/R FL | Cohort 4: R/R MZL | Cohort 5: R/R CLL/SLL | Total |
|---|---|---|---|---|---|---|
| American Indian or Alaska Native | 0 | 0 | 0 | 0 | 0 | 0 |
| Asian | 0 | 0 | 0 | 0 | 0 | 0 |
| Native Hawaiian or Other Pacific Islander | 0 | 0 | 0 | 0 | 0 | 0 |
| Black or African American | 0 | 0 | 0 | 0 | 0 | 0 |
| White | 14 | 9 | 18 | 3 | 3 | 47 |
| More than one race | 0 | 0 | 0 | 0 | 0 | 0 |
| Unknown or Not Reported | 1 | 2 | 3 | 0 | 1 | 7 |
Documents are hosted by the registry — open the source record to download them.
Plan to share: Yes — Incyte shares data with qualified external researchers after a research proposal is submitted. These requests are reviewed and approved by a review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations. The trial data availability is according to the criteria and process described on https://www.incyte.com/our-company/compliance-and-transparency
Supporting information: Study protocol, Sap
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Leukemia, Lymphocytic, Chronic, B-Cell→
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