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CAL-101

Phase 4FDA approved 2014

Chronic Lymphocytic Leucemia | Small molecule | Other |Gilead Sciences, Inc.|Trials Updated: Mar 17, 2026

CAL-101 development status

FDA approval Jul 23, 2014 as Zydelig
Approval holderGilead Sciences Inc
ApplicationNDA206545
Highest phase Phase 4 (NCT02739360)
Phase scored for GILDPhase 2
Registered trials 46 across 13 sponsors since Jul 2008

CAL-101 target and mechanism

ModalitySmall molecule

Also known as Idelalisib, GS-1101, Zydelig®, IDELA

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials13
Total Enrollment1,473

FDA Designations

No designations recorded

CAL-101 clinical trials

CAL-101 · 13 trials · 18 indications

Phase 3 2Phase 2 4Phase 1 7
NCT01569295Study Evaluating the Efficacy and Safety of Idelalisib in Combination With Bendamustine and Rituximab for Previously Treated Chronic Lymphocytic Leukemia (CLL) (Tugela )Chronic Lymphocytic Leukemia
COMPLETED416 Analytics
NCT01539512A Randomized, Double-Blind, Placebo-Controlled Study of Idelalisib in Combination With Rituximab for Previously Treated Chronic Lymphocytic Leukemia (CLL)Chronic Lymphocytic Leukemia
COMPLETED220 Analytics
PHASE3COMPLETED
Study Evaluating the Efficacy and Safety of Idelalisib in Combination With Bendamustine and Rituximab for Previously Treated Chronic Lymphocytic Leukemia (CLL) (Tugela )
Chronic Lymphocytic LeukemiaUnlock trial analytics
PHASE3COMPLETED
A Randomized, Double-Blind, Placebo-Controlled Study of Idelalisib in Combination With Rituximab for Previously Treated Chronic Lymphocytic Leukemia (CLL)
Chronic Lymphocytic LeukemiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Progression-Free Survival (PFS)
Up to 84 months

PFS was defined as the interval from randomization to the earlier of the first documentation of definitive disease progression or death from any cause. PFS (months) = (minimum (date of disease progression, date of death) - date of randomization + 1)/30.4375.

Progression-Free Survival
Up to 17 months

Progression-free survival was defined as the interval from randomization to the earlier of the first documentation of definitive disease progression or death from any cause. Definitive disease progression was CLL progression based on standard criteria (other than lymphocytosis alone) as defined by the 2008 update of the International Workshop on CLL guidelines, ie, appearance of any new lesion; increase by ≥ 50% in the sum of the products of the perpendicular diameters of measured lymph nodes (SPD); new or ≥ 50% enlargement of liver or spleen; transformation to a more aggressive histology (eg, Richter's or prolymphocytic transformation); reduction in the number of blood cells (cytopenia) attributable to CLL.

Overall response rate (ORR)
84 days after start of the last induction cycle

Proportion of patients responding according to international working Group on chronic lymphocytic leukemia criteria

Overall Response Rate
Up to Week 110

Overall response rate (ORR) was assessed based on the International Working Group Revised Response Criteria for Malignant Lymphoma (Cheson, 2007), and was defined as the proportion of participants achieving a complete response (CR) or partial response (PR) as assessed by the investigator. * CR was defined as the complete resolution of all disease-related radiological abnormalities and the disappearance of all signs and symptoms related to the disease. * PR was defined as a ≥ 50% reduction in the sum of the products of the longest perpendicular diameters of all index lesions, with no new lesions.

Maximum tolerated dose (MTD) of idelalisib and lenalidomide, determined according to incidence of dose-limiting toxicity (DLT) graded using the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 4.0 (Phase I)
28 days
Progression Free Survival (PFS) of the combination of lenalidomide, with or without idelalisib (Phase II)
Time between registration and disease progression or death, assessed up to 2 years
Percentage of Participants Experiencing Treatment-Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs) Within 28 Days of Idelalisib Exposure
First dose date up to 28 days

An AE was any untoward medical occurrence in a clinical study participant which did not necessarily have a causal relationship with the treatment. An AE can therefore be any unfavorable and/or unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. TEAEs were defined as 1 or both of the following: 1) Any AEs with an onset date on or after the study drug start date and no later than 30 days after permanent discontinuation of study drug; and/or 2) Any AEs leading to premature discontinuation of study drug.

Percentage of Participants Experiencing TEAEs Related to Idelalisib Within 28 Days of Idelalisib Exposure
First dose date up to 28 days

An AE was any untoward medical occurrence in a clinical study participant which did not necessarily have a causal relationship with the treatment. An AE can therefore be any unfavorable and/or unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. TEAEs were defined as 1 or both of the following: 1) Any AEs with an onset date on or after the study drug start date and no later than 30 days after permanent discontinuation of study drug; and/or 2) Any AEs leading to premature discontinuation of study drug.

Percentage of Participants Experiencing Treatment-Emergent Laboratory Abnormalities Within 28 Days of Idelalisib Exposure by Worst Grade at Postbaseline
First dose date up to 28 days

Treatment-emergent laboratory abnormalities were defined as values that increase at least one toxicity grade from baseline. If the relevant baseline laboratory value was missing, then any abnormality of at least Grade 1 observed within the time frame specified above was considered treatment-emergent.The most severe graded abnormality from all tests was counted for each participant. Treatment-emergent laboratory abnormalities were graded per Common Terminology Criteria for Adverse Events (CTCAE), Version 4.03 where 1=Mild, 2=Moderate, 3=Severe, 4=Potentially Life Threatening.

Percentage of Participants Who Permanently Discontinued Idelalisib Due to a TEAE Within 28 Days of Idelalisib Exposure
First dose date up to 28 days

An AE was any untoward medical occurrence in a clinical study participant which did not necessarily have a causal relationship with the treatment. An AE can therefore be any unfavorable and/or unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. TEAEs were defined as 1 or both of the following: 1) Any AEs with an onset date on or after the study drug start date and no later than 30 days after permanent discontinuation of study drug; and/or 2) Any AEs leading to premature discontinuation of study drug.

Plasma Concentration of Idelalisib and Its Major Metabolite GS-563117 on Day 1
Predose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, and 12 hours postdose on Day 1

Lower limit of quantitation was 5 ng/mL for idelalisib and metabolite GS-563117 both.

Plasma Concentration of Idelalisib and Its Major Metabolite GS-563117 on Day 8
Predose and 1.5 hours postdose on Day 8
Plasma Concentration of Idelalisib and Its Major Metabolite GS-563117 on Day 15
Predose and 1.5 hours postdose on Day 15
Plasma Concentration of Idelalisib and Its Major Metabolite GS-563117 on Day 22
Predose and 1.5 hours postdose on Day 22
Plasma Concentration of Idelalisib and Its Major Metabolite GS-563117 on Day 29
Predose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, and 12 hours postdose on Day 29
MTD based on the incidence of dose-limiting toxicity (DLT) assessed by the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 4.0
Up to 13 months
Overall Safety of Idelalisib
30 days post last study treatment (up to 12 months)

The overall safety of idelalisib was assessed as the percentage of participants experiencing treatment-emergent adverse events (AEs; Serious AEs, Grade ≥ 3 AEs, AEs related to idelalisib, and AEs leading to discontinuation of idelalisib).

Clinical Response: Overall Response Rate
Up to twelve 28-day cycles (maximum of 12 months)

Participants were assessed for clinical response by appropriate imaging at the end of cycles 3, 6, 9, and 12. Overall response rate (ORR) was assessed based on standardized criteria (Cheson 2007), and was defined as the percentage of participants who achieved a complete response (CR) or partial response (PR) based on investigator assessment after the start of idelalisib treatment until progression or the end of study drug treatment. * CR was defined as the disappearance of all evidence of disease. * PR was defined the regression of measurable disease and no new sites.

Duration of Exposure to IDELA
First dose date up to 12 months

Duration of exposure to IDELA was summarized using descriptive statistics.

Toxicity of Administration of IDELA
First dose date up to 5 years

Percentage of participants experiencing toxicities of administration of IDELA were measured according to the Common Terminology Criteria for Adverse Events v4.02

Evaluate the safety CAL-101 using adverse events, vital signs, clinical laboratory tests, spirometry and ECG
Baseline to Day 35
To evaluate the safety of CAL-101 and determine the dose limiting toxicity in patients with hematologic malignancies.
28 days

Secondary Endpoints

Overall Response Rate (ORR)
Up to 84 months
Lymph Node Response Rate
Up to 84 months
Overall Survival
Up to 84 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Idelalisib+bendamustine+rituximabEXPERIMENTALParticipants will receive idelalisib plus bendamustine and rituximab
Placebo to match idelalisib+bendamustine+rituximabPLACEBO_COMPARATORParticipants will receive placebo to match idelalisib plus bendamustine and rituximab
Idelalisib + rituximabACTIVE_COMPARATORParticipants will receive idelalisib plus rituximab
Placebo + rituximabPLACEBO_COMPARATORParticipants will receive placebo to match idelalisib plus rituximab
Bendamustine + GA101 + CAL-101EXPERIMENTALBendamustine: 70 mg/m2 i.v. GA101: 1000 mg CAL-101: 150 mg p.o.
Idelalisib & OfatumumabEXPERIMENTALIdelalisib will be given orally continuously at 150 mg BID. On day 57, ofatumumab will begin with the 300 mg dose, given after idelalisib is taken. Ofatumumab will then be administered at 1000 mg weekly to complete 8 weeks (days 64, 71, 78, 85, 92, 99, 106) throughout Cycles 3 and 4. This will be followed by monthly ofatumumab on weeks 20, 24, 28, 32 to complete 4 additional cycles (5-8). The overall induction treatment period will then be 8 months, comprised of two months of single agent idelalisib followed by 6 months of ofatumumab with idelalisib. After the completion of the induction treatment, idelalisib will continue indefinitely in arbitrarily defined 28 day cycles in all participants who have not had excessive toxicity and do not have progressive disease.
IdelalisibEXPERIMENTALParticipants will receive up to 300 mg of idelalisib twice daily.
lenalidomide (Phase II)ACTIVE_COMPARATORLenalidomide will be administered orally at 20 mg daily on days 1-21, repeated every 28 days for a maximum of 12 cycles (48 weeks). (Phase II)
lenalidomide and idelalisib (Phase II)EXPERIMENTALLenalidomide will be administered orally and daily on days 1-21, repeated every 28 days for a maximum of 12 cycles (48 weeks). Idelalisib will be orally administered for continuous 28-day cycles until progression, intolerance, or patient/physician discretion. Dosing will be determined by the Phase I portion of the study. (Phase II)
lenalidomide and idelalisibEXPERIMENTALLenalidomide: Lenalidomide will be administered orally on days 1-21 followed by 7 days of rest, every 28 days. A treatment cycle will be considered 28 days in length. In the absence of intolerable toxicity or disease progression, lenalidomide will be given for a total of 12 cycles. Idelalisib: Dosing is fixed in all cohorts receiving idelalisib at 150 mg orally (twice daily) for 12 cycles, with the exception of dose modifications for toxicity.
Idelalisib + Rituximab + BendamustineEXPERIMENTALParticipants with CLL, iNHL and mantle cell lymphoma (MCL) will receive treatments as follows: Cohort 3a: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + rituximab 375 mg/m\^2 IV on Day 1 of each 28-day cycle, Cycles 1 - 6 + bendamustine 90 mg/m\^2 IV on Days 1 \& 2 of each 28-day cycle, Cycles 1 - 6 Cohort 3b: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + rituximab 375 mg/m\^2 IV on Day 1 of each 28-day cycle, Cycles 1 - 6 + bendamustine 70 mg/m\^2 IV on Days 1 \& 2 of each 28-day cycle from Cycles 1 - 6 Cohort 5c: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + rituximab 375 mg/m\^2 IV on Day 1 of each 28-day cycle, Cycles 1 - 6 + bendamustine 90 mg/m\^2 IV on Days 1 \& 2 of each 28-day cycle, Cycles 1 - 6
Idelalisib + BendamustineEXPERIMENTALParticipants with CLL and iNHL will receive treatments as follows: Cohort 1b: IDELA 100 mg orally BID on Days 1 - 28 of each 28-day cycle + bendamustine 90 mg/m\^2 IV on Days 1 \& 2 of each 28-day cycle, Cycles 1 - 6 Cohort 2b: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + bendamustine 90 mg/m\^2 IV on Days 1 \& 2 of each 28-day cycle, Cycles 1 - 6 Cohort 3f: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + bendamustine 90 mg/m\^2 IV on Days 1 \& 2 of each 28-day cycle, Cycles 1 - 6 Cohort 3g: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + bendamustine 70 mg/m\^2 IV on Days 1 \& 2 of each 28-day cycle, Cycles 1 - 6 Cohort 4b: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle starting Cycle 2, Day 3 (after the Cycle 2 bendamustine dosing) + bendamustine 90 mg/m\^2 IV on Days 1 \& 2 of each 28-day cycle, Cycles 1 - 6
Idelalisib + OfatumumabEXPERIMENTALParticipants with CLL will receive treatments as follows: Cohort 3c: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + ofatumumab 12 doses (300 mg (Day 1 or Day 2, Dose 1), followed 1 week later by 1,000 mg weekly for 7 doses (Doses 2 - 8), followed 5 weeks later by 1,000 mg every 4 weeks for 4 doses (Doses 9 - 12))
Idelalisib + FludarabineEXPERIMENTALParticipants with CLL will receive treatments as follows: Cohort 3d: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + fludarabine 40 mg/m\^2 orally on Days 1 - 5 of each 28-day cycle, Cycles 1 - 6
Idelalisib + EverolimusEXPERIMENTALParticipants with MCL will receive treatments as follows: Cohort 5a: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + everolimus 10 mg orally once daily on Days 1 - 28 of each 28-day cycle
Idelalisib + BortezomibEXPERIMENTALParticipants with MCL will receive treatments as follows: Cohort 5b: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + bortezomib 1.3 mg/m\^2 subcutaneously on Days 1, 8 \& 15 of each 28-day cycle
Idelalisib + ChlorambucilEXPERIMENTALParticipants with CLL will receive treatments as follows: Cohort 6a: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + chlorambucil 10 mg/m\^2 orally once daily for 7 days every 28 days, Cycles 1 - 12
Idelalisib + Rituximab + ChlorambucilEXPERIMENTALParticipants with CLL will receive treatments as follows: Cohort 6b: IDELA 150 mg orally BID on Days 1 - 28 of each 28-day cycle + rituximab 375 mg/m\^2 IV on Day 1 of each 28-day cycle, Cycles 1 - 6 + chlorambucil 10 mg/m\^2 orally once daily for 7 days every 28 days, Cycles 1 - 12
Idelalisib + Rituximab + LenalidomideEXPERIMENTALParticipants with CLL and iNHL will receive treatments as follows: Cohort 7a: IDELA 150 mg orally BID on Days 1 - 35 of Cycle 1 (35 days) \& Days 1 - 28 of all subsequent 28-day cycles + rituximab 375 mg/m\^2 IV on Days 1 \& 8 of Cycle 1 \& Day 1 of Cycles 2 - 6 + lenalidomide 5 mg orally once daily on Days 8 - 28 of Cycle 1 (35 days) \& Days 1 - 21 of next five 28-day cycles Cohort 7b: IDELA 150 mg orally BID on Days 1 - 35 of Cycle 1 (35 days) \& Days 1 - 28 of all subsequent 28-day cycles + rituximab 375 mg/m\^2 IV on Days 1 \& 8 of Cycle 1 \& Day 1 of Cycles 2 - 6 + lenalidomide 10 mg orally once daily on Days 8 - 28 of Cycle 1 (35 days) \& Days 1 - 21 of next five 28-day cycles Cohort 7c: IDELA 150 mg orally BID on Days 1 - 35 of Cycle 1 (35 days) \& Days 1 - 28 of all subsequent 28-day cycles + rituximab 375 mg/m\^2 IV on Days 1 \& 8 of Cycle 1 \& Day 1 of Cycles 2 - 6 + lenalidomide 20 mg orally once daily on Days 8 - 28 of Cycle 1 (35 days) \& Days 1 - 21 of next five 28-day cycles
CAL-101ACTIVE_COMPARATOR -
PlaceboPLACEBO_COMPARATOR -
one armEXPERIMENTAL -

Interventions

NameTypeDescription
IdelalisibDRUGIdelalisib 150 mg administered orally twice daily
RituximabDRUGRituximab 375 mg/m\^2 on Day 1, then 500 mg/m\^2 every 28 days administered intravenously for a maximum of 6 infusions
BendamustineDRUGBendamustine 70 mg/mg\^2/day on 2 consecutive days every 28 days administered intravenously for a maximum of 12 infusions
Placebo to match idelalisibDRUGPlacebo to match idelalisib administered orally twice daily
GA101DRUGInduction: Cycle 1: d1: 100mg, d1(or2): 900mg, d8 \& 15: 1000mg; Cycle 2-6: d1: 1000mg Maintenance: Cycle 1-8 (Duration 12 weeks): d1 1000 mg.
CAL-101DRUGInduction: Cycle 2-6: d1-28: 150 mg p.o. Maintenance: Cycles 1-8 (Duration 12 weeks): d1-84 150 mg p.o.
OfatumumabDRUGOfatumumab will then be administered at 1000 mg weekly to complete 8 weeks (days 64, 71, 78, 85, 92, 99, 106) throughout Cycles 3 and 4. This will be followed by monthly ofatumumab on weeks 20, 24, 28, 32 to complete 4 additional cycles (5-8).
lenalidomideDRUGgiven PO
FludarabineDRUGFludarabine administered orally
EverolimusDRUGEverolimus administered orally twice daily until disease progression
BortezomibDRUGBortezomib administered as a subcutaneous injection
ChlorambucilDRUGChlorambucil administered on Days 1-7 every 28 days to allow appropriate therapy for participants with CLL and to coordinate into a cycle period equivalent to other study treatment regimens.
PlaceboDRUGPlacebo capsules administered orally BID for 7 days
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites106

Key Inclusion Criteria: * Previously treated recurrent CLL * Measurable lymphadenopathy * Requires therapy for CLL * Has experienced CLL progression \< 36 months since the completion of the last prior therapy Key Exclusion Criteria: * Recent history of a major non-CLL malignancy * Evidence of an ...

Countries:United StatesAustraliaBelgiumCanadaCroatiaCzechiaFranceGreeceHungaryIrelandItalyPolandPortugalRomaniaRussiaSpainTurkey (Türkiye)United KingdomGermanyJapanAustria
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Frequently asked questions about CAL-101

What is CAL-101?

CAL-101 is an investigational small molecule developed by Gilead Sciences, Inc. (ticker GILD). It has been studied in allergic rhinitis and in blood cancers including chronic lymphocytic leukemia (CLL), non-Hodgkin lymphoma, acute myeloid leukemia, and multiple myeloma. It is not described as approved and remains in clinical development.

What is CAL-101 used for in chronic lymphocytic leukemia?

CAL-101 has been studied in chronic lymphocytic leukemia, including a Phase 2 trial that combined bendamustine debulking with CAL-101 and GA101 as induction and maintenance therapy in CLL. That trial, NCT02445131, enrolled 48 participants in Germany and has been completed.

Who makes CAL-101?

CAL-101 is developed by Gilead Sciences, Inc., which trades under the ticker GILD. Gilead is the sponsor associated with the clinical development program covering the allergic rhinitis and hematologic malignancy studies of CAL-101.

What phase is CAL-101 in?

CAL-101 has been tested in Phase 1 and Phase 2 clinical trials. The Phase 1 studies include NCT00836914 in allergic rhinitis and NCT00710528 in relapsed or refractory hematologic malignancies. The Phase 2 study NCT02445131 evaluated CAL-101 in chronic lymphocytic leukemia. All listed trials are completed.

What clinical trials is CAL-101 in?

CAL-101 has been evaluated in three completed trials: NCT00710528, a Phase 1 dose escalation study in relapsed or refractory hematologic malignancies with 192 participants; NCT00836914, a Phase 1 allergic rhinitis study with 41 participants in Austria; and NCT02445131, a Phase 2 CLL study with 48 participants in Germany.

How many patients were enrolled in CAL-101 trials?

Across the reported CAL-101 studies, total enrollment was 192 participants in the Phase 1 dose escalation trial NCT00710528, 41 participants in the Phase 1 allergic rhinitis trial NCT00836914, and 48 participants in the Phase 2 CLL trial NCT02445131. The Phase 1 dose escalation study was randomized, double blind, and placebo controlled.