Clinical Trial Results:
A Phase 2, Multicenter Study of the Effect of the Addition of SNDX-275 to Continued Aromatase Inhibitor (AI) Therapy in Postmenopausal Women with ER+ Breast Cancer Whose Disease is Progressing
Summary
|
|
EudraCT number |
2007-006415-23 |
Trial protocol |
GB IE |
Global end of trial date |
24 Nov 2009
|
Results information
|
|
Results version number |
v1 |
This version publication date |
25 Jun 2022
|
First version publication date |
25 Jun 2022
|
Other versions |
v2 |
Trial Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
|
|||
Trial identification
|
|||
Sponsor protocol code |
SNDX-275-0303
|
||
Additional study identifiers
|
|||
ISRCTN number |
- | ||
US NCT number |
NCT00828854 | ||
WHO universal trial number (UTN) |
- | ||
Sponsors
|
|||
Sponsor organisation name |
Syndax Pharmaceuticals, Inc.
|
||
Sponsor organisation address |
35 Gatehouse Drive, Building D, Floor 3, Waltham, MA, United States, 02451
|
||
Public contact |
Main Telephone Number, Syndax Pharmaceuticals, Inc., +1 781-419-1400, clinicaltrials@syndax.com
|
||
Scientific contact |
Main Telephone Number, Syndax Pharmaceuticals, Inc., +1 781-419-1400, clinicaltrials@syndax.com
|
||
Paediatric regulatory details
|
|||
Is trial part of an agreed paediatric investigation plan (PIP) |
No
|
||
Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
|
||
Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
|
||
Results analysis stage
|
|||
Analysis stage |
Final
|
||
Date of interim/final analysis |
24 Nov 2009
|
||
Is this the analysis of the primary completion data? |
No
|
||
Global end of trial reached? |
Yes
|
||
Global end of trial date |
24 Nov 2009
|
||
Was the trial ended prematurely? |
No
|
||
General information about the trial
|
|||
Main objective of the trial |
To evaluate the tumor responses to SNDX-275 in combination with continued AI therapy as measured by clinical benefit rate (CBR) during the first 6 cycles of study treatment, that is, complete response (CR), partial response (PR), or stable disease (SD) for at least 6 months.
|
||
Protection of trial subjects |
This study was conducted in accordance with International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) Good Clinical Practice, and the principles of the Declaration of Helsinki, in addition to following the laws and regulations of the country or countries in which a study is conducted.
|
||
Background therapy |
- | ||
Evidence for comparator |
- | ||
Actual start date of recruitment |
01 Oct 2008
|
||
Long term follow-up planned |
No
|
||
Independent data monitoring committee (IDMC) involvement? |
Yes
|
||
Population of trial subjects
|
|||
Number of subjects enrolled per country |
|||
Country: Number of subjects enrolled |
United Kingdom: 18
|
||
Country: Number of subjects enrolled |
Ireland: 9
|
||
Worldwide total number of subjects |
27
|
||
EEA total number of subjects |
9
|
||
Number of subjects enrolled per age group |
|||
In utero |
0
|
||
Preterm newborn - gestational age < 37 wk |
0
|
||
Newborns (0-27 days) |
0
|
||
Infants and toddlers (28 days-23 months) |
0
|
||
Children (2-11 years) |
0
|
||
Adolescents (12-17 years) |
0
|
||
Adults (18-64 years) |
7
|
||
From 65 to 84 years |
20
|
||
85 years and over |
0
|
|
|||||||||||||||
Recruitment
|
|||||||||||||||
Recruitment details |
Participants took part in the study at 8 investigative sites in the United Kingdom (UK) and Ireland from 1 October 2008 to 24 November 2009. | ||||||||||||||
Pre-assignment
|
|||||||||||||||
Screening details |
Participants with a diagnosis of estrogen receptor-positive (ER+) breast cancer whose disease was progressing were enrolled to receive entinostat 5 milligrams (mg) in combination with continued AI therapy. | ||||||||||||||
Period 1
|
|||||||||||||||
Period 1 title |
Overall Study (overall period)
|
||||||||||||||
Is this the baseline period? |
Yes | ||||||||||||||
Allocation method |
Not applicable
|
||||||||||||||
Blinding used |
Not blinded | ||||||||||||||
Blinding implementation details |
This was an open-label study.
|
||||||||||||||
Arms
|
|||||||||||||||
Arm title
|
Entinostat 5 mg + AI | ||||||||||||||
Arm description |
Entinostat 5 mg tablet orally every week on Days 1, 8, 15 and 22 of each 28-day treatment cycle in combination with continued treatment with AI therapy at labeled dose and schedule until disease progression or unacceptable toxicity. | ||||||||||||||
Arm type |
Experimental | ||||||||||||||
Investigational medicinal product name |
Entinostat
|
||||||||||||||
Investigational medicinal product code |
|||||||||||||||
Other name |
SNDX-275
|
||||||||||||||
Pharmaceutical forms |
Tablet
|
||||||||||||||
Routes of administration |
Oral use
|
||||||||||||||
Dosage and administration details |
Entinostat 5 mg per oral (PO) every week
|
||||||||||||||
Investigational medicinal product name |
Aromatase Inhibitor Therapy
|
||||||||||||||
Investigational medicinal product code |
|||||||||||||||
Other name |
AI Therapy
|
||||||||||||||
Pharmaceutical forms |
Tablet
|
||||||||||||||
Routes of administration |
Oral use
|
||||||||||||||
Dosage and administration details |
AI therapy at labeled dose and schedule as prescribed in clinical practice. AI therapies included: Arimidex (anastrozole) 1 mg/day PO, Fermara (letrozole) 2.5 mg/day PO, Aromasin (exemestane) 25 mg/day PO.
|
||||||||||||||
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Baseline characteristics reporting groups
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Entinostat 5 mg + AI
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group description |
Entinostat 5 mg tablet orally every week on Days 1, 8, 15 and 22 of each 28-day treatment cycle in combination with continued treatment with AI therapy at labeled dose and schedule until disease progression or unacceptable toxicity. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
|||
End points reporting groups
|
|||
Reporting group title |
Entinostat 5 mg + AI
|
||
Reporting group description |
Entinostat 5 mg tablet orally every week on Days 1, 8, 15 and 22 of each 28-day treatment cycle in combination with continued treatment with AI therapy at labeled dose and schedule until disease progression or unacceptable toxicity. | ||
Subject analysis set title |
Per-protocol Set
|
||
Subject analysis set type |
Per protocol | ||
Subject analysis set description |
Participants from the full analysis who met eligibility criteria, completed at least 2 cycles and who had baseline and post-baseline tumor assessments.
|
||
Subject analysis set title |
Full Analysis Set
|
||
Subject analysis set type |
Full analysis | ||
Subject analysis set description |
All eligible participants who signed informed consent.
|
||
Subject analysis set title |
Safety Analysis Set
|
||
Subject analysis set type |
Safety analysis | ||
Subject analysis set description |
All participants who received at least 1 dose of study drug.
|
|
|||||||||
End point title |
Clinical Benefit Rate [1] | ||||||||
End point description |
CBR is defined as the percentage of participants who achieved CR or PR or SD for 6 months as assessed by the investigator based on Response Evaluation Criteria in Solid Tumors (RECIST), version 1.0. CR is defined as the disappearance of all target lesions. PR is defined as at least a 30% decrease in the sum of the longest diameter (LD) of target lesions, taking as reference the baseline sum LD. SD is defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum LD since the treatment started.
|
||||||||
End point type |
Primary
|
||||||||
End point timeframe |
6 months
|
||||||||
Notes [1] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point. Justification: Only the 95% confidence interval is reported for this end point. |
|||||||||
|
|||||||||
No statistical analyses for this end point |
|
|||||||||
End point title |
Progression-free Survival (PFS) | ||||||||
End point description |
PFS is defined as the number of months from the date of randomization to the earlier of PD or death due to any cause.
|
||||||||
End point type |
Secondary
|
||||||||
End point timeframe |
From date of randomization to discontinuation due to disease progression or death up to primary completion date (Median follow-up 7.4 months)
|
||||||||
|
|||||||||
No statistical analyses for this end point |
|
|||||||||
End point title |
Objective Response Rate (ORR) During the First 6 Cycles of Study Treatment | ||||||||
End point description |
ORR is defined as the percentage of participants with response during treatment classified as CR or PR, as assessed by the investigator based on RECIST, version 1.0. CR is defined as the disappearance of all target lesions. PR is defined as at least a 30% decrease in the sum of the LD of target lesions, taking as reference the baseline sum LD.
|
||||||||
End point type |
Secondary
|
||||||||
End point timeframe |
From date of randomization to discontinuation due to disease progression or intolerable adverse event (AE) up to primary completion date (Median follow-up 7.4 months)
|
||||||||
|
|||||||||
No statistical analyses for this end point |
|
|||||||
End point title |
Number of Participants With AEs | ||||||
End point description |
An AE is defined as any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product and that does not necessarily have a causal relationship with this treatment. Worsening of a pre-existing medical condition was considered an AE if there was either an increase in severity, frequency, or duration of the condition or an association with significantly worse outcomes. Abnormal clinical laboratory findings determined by the investigator to be clinically significant were recorded as AEs.
|
||||||
End point type |
Secondary
|
||||||
End point timeframe |
Up to 8, 28-day cycles + 30 days (approximately 254 days)
|
||||||
|
|||||||
No statistical analyses for this end point |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Adverse events information
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Timeframe for reporting adverse events |
Up to 8, 28-day cycles + 30 days (Approximately 254 days)
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Adverse event reporting additional description |
Safety Set included all participants who received at least 1 dose of study drug.
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Assessment type |
Systematic | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary used for adverse event reporting
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary name |
MedDRA | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary version |
10.1
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting groups
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Entinostat 5 mg + AI
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group description |
Entinostat 5 mg tablet orally every week on Days 1, 8, 15 and 22 of each 28-day treatment cycle in combination with continued treatment with AI therapy at labeled dose and schedule until disease progression or unacceptable toxicity. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Frequency threshold for reporting non-serious adverse events: 5% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
|||
Substantial protocol amendments (globally) |
|||
Were there any global substantial amendments to the protocol? Yes | |||
Date |
Amendment |
||
23 Jun 2008 |
• The number of participating sites was increased from 6 in the UK to between 10 and 13 in the UK and Ireland.
• Physical examination was added to the Day 1 visit assessments.
• Compliance assessments were added to the schedule of observations. |
||
08 Oct 2008 |
• Ancillary study of markers of bone turnover was restricted to participants who had never received a bisphosphonate.
• Inclusion criterion relating to a measurable lesion was amended as follows: if the only measurable lesion was located in a previously irradiated area, the lesion must have demonstrated progression according to RECIST criteria.
• Exclusion criterion addressing concurrent medical conditions was expanded to include myocardial infarction or thromboembolic events and specificity relating to prior malignancies.
• The maximum treatment duration of 6 cycles was removed.
• Overall survival was added as an exploratory endpoint.
• 12-lead electrocardiogram was added at each cycle and end-of-treatment.
• Sampling times for serum marker of bone turnover, urine marker of bone turnover, and tumor markers were expanded.
• Independent Data Monitoring Board provision was added to monitor safety and efficacy on an ongoing basis.
• Provision for a planned interim analysis of efficacy was added (but with no early stopping contingency). |
||
Interruptions (globally) |
|||
Were there any global interruptions to the trial? No | |||
Limitations and caveats |
|||
Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data. | |||
None reported |