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Safety and Efficacy Study of Idelalisib (GS-1101, CAL-101) in Patients With Previously Treated Low-grade Lymphoma

Single-agent Idelalisib for Previously Treated Low-grade Lymphoma: A Phase 1/2 Study of Safety, Efficacy, and Flow-cytometric Assessment of Tumor-cell Signaling Events

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01306643
Enrollment
18
Registered
2011-03-02
Start date
2011-02-28
Completion date
2015-08-31
Last updated
2018-11-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Follicular Lymphoma, Indolent Non-Hodgkin's Lymphoma, Marginal Zone Lymphoma, Small Lymphocytic Lymphoma

Keywords

Indolent Non-Hodgkin's Lymphoma, Non-Hodgkin Lymphoma, iNHL, NHL, CAL-101, PI3K, Phosphatidylinositol 3-kinase, Follicular Lymphoma (FL), Small Lymphocytic Lymphoma (SLL), Marginal Zone Lymphoma (MZL)

Brief summary

The primary objectives of this study is to evaluate the safety and efficacy of idelalisib (GS-1101, CAL-101) in participants with previously treated indolent non-Hodgkin lymphoma (iNHL). Eligible patients will initiate oral therapy with idelalisib at a starting dose of 150 mg twice per day. Treatment with idelalisib can continue in compliant participants for up to twelve 28-day cycles of idelalisib. Participants who appear to be benefiting from treatment at the completion of 12 cycles of treatment with idelalisib may be eligible for participation in a long-term safety extension study of idelalisib.

Interventions

DRUGIdelalisib

Tablet(s) administered orally twice daily

Sponsors

Gilead Sciences
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Previously treated relapsed or refractory B-cell iNHL * Provide written informed consent

Exclusion criteria

* Pregnant or nursing * Active, serious infection requiring systemic therapy * Positive test for HIV antibodies * Active hepatitis B or C viral infection

Design outcomes

Primary

MeasureTime frameDescription
Overall Safety of Idelalisib30 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 RateUp 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.

Secondary

MeasureTime frame
Flow Cytometric Measurement of Constitutive or Inducible Phosphorylation of Akt (at S473) and S6 Within Tumor B CellsUp to twelve 28-day cycles (maximum of 12 months)
Flow Cytometric Measurement of Tumoral and Peripheral Blood T and NK CellsUp to twelve 28-day cycles (maximum of 12 months)
Changes in Concentration of Peripheral Blood Chemokines and CytokinesUp to twelve 28-day cycles (maximum of 12 months)
Changes in Liver Imaging as Assessed by Magnetic Resonance Imaging (MRI) and Gadoxetic Acid (GD-EOB-DTPA) ContrastUp to twelve 28-day cycles (maximum of 12 months)

Countries

United States

Participant flow

Recruitment details

Participants were enrolled at 2 study sites in the United States. The first participant was screened on 22 February 2011. The last study visit occurred on 24 August 2015.

Pre-assignment details

24 participants were screened.

Participants by arm

ArmCount
Idelalisib
Idelalisib 150 mg tablet(s) administered orally twice daily for a maximum of twelve 28-day cycles
18
Total18

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyAdverse Event5
Overall StudyDisease Progression7
Overall StudyOther: Change in Eligibility Status1

Baseline characteristics

CharacteristicIdelalisib
Age, Continuous58 years
STANDARD_DEVIATION 12.6
Diagnosis
Follicular lymphoma
10 participants
Diagnosis
Marginal zone lymphoma
3 participants
Diagnosis
Missing
1 participants
Diagnosis
Small lymphocytic lymphoma
4 participants
Sex: Female, Male
Female
8 Participants
Sex: Female, Male
Male
10 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
— / —
other
Total, other adverse events
15 / 18
serious
Total, serious adverse events
5 / 18

Outcome results

Primary

Clinical Response: Overall Response Rate

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.

Time frame: Up to twelve 28-day cycles (maximum of 12 months)

Population: ITT Analysis Set

ArmMeasureValue (NUMBER)
IdelalisibClinical Response: Overall Response Rate44.4 percentage of participants
Primary

Overall Safety of Idelalisib

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).

Time frame: 30 days post last study treatment (up to 12 months)

Population: Intent-to-treat (ITT) Analysis Set: all enrolled participants who received at least 1 dose of idelalisib.

ArmMeasureGroupValue (NUMBER)
IdelalisibOverall Safety of IdelalisibAny AE88.9 percentage of participants
IdelalisibOverall Safety of IdelalisibSerious AE27.8 percentage of participants
IdelalisibOverall Safety of IdelalisibGrade ≥ 3 AE55.6 percentage of participants
IdelalisibOverall Safety of IdelalisibAE related to idelalisib83.3 percentage of participants
IdelalisibOverall Safety of IdelalisibAE leading to permanent drug discontinuation27.8 percentage of participants
Secondary

Changes in Concentration of Peripheral Blood Chemokines and Cytokines

Time frame: Up to twelve 28-day cycles (maximum of 12 months)

Population: Data are not available because the samples and analysis results (performed at the sites) could not be retrieved by Gilead.

Secondary

Changes in Liver Imaging as Assessed by Magnetic Resonance Imaging (MRI) and Gadoxetic Acid (GD-EOB-DTPA) Contrast

Time frame: Up to twelve 28-day cycles (maximum of 12 months)

Population: Data are not available because the samples and analysis results (performed at the sites) could not be retrieved by Gilead.

Secondary

Flow Cytometric Measurement of Constitutive or Inducible Phosphorylation of Akt (at S473) and S6 Within Tumor B Cells

Time frame: Up to twelve 28-day cycles (maximum of 12 months)

Population: Data are not available because the samples and analysis results (performed at the sites) could not be retrieved by Gilead.

Secondary

Flow Cytometric Measurement of Tumoral and Peripheral Blood T and NK Cells

Time frame: Up to twelve 28-day cycles (maximum of 12 months)

Population: Data are not available because the samples and analysis results (performed at the sites) could not be retrieved by Gilead.

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026