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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/ct2/show/NCT04985721




Registration number
NCT04985721
Ethics application status
Date submitted
28/06/2021
Date registered
2/08/2021
Date last updated
15/03/2023

Titles & IDs
Public title
A Trial of Pamiparib With Tislelizumab in Patients With Advanced Tumours With Homologous Recombination Repair Defects
Scientific title
An Open Label, Signal Seeking, Translational, Phase II Trial of Pamiparib in Combination With Tislelizumab in Patients With Advanced Tumours With Homologous Recombination Repair Defects
Secondary ID [1] 0 0
20/044
Universal Trial Number (UTN)
Trial acronym
IMPARP-HRD
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Cancer 0 0
Condition category
Condition code

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Treatment: Drugs - Pamiparib
Treatment: Drugs - Tislelizumab

Experimental: Pamiparib and Tiselizumab -


Treatment: Drugs: Pamiparib
40 mg orally twice a day

Treatment: Drugs: Tislelizumab
200 mg IV every 21 days
Intervention code [1] 0 0
Treatment: Drugs
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
Evaluation of clinical benefit rate (CBR) in patients with advanced tumours harbouring molecular profiles consistent with homologous recombination defeciency (HRD), without a known pathogenic germline BRCA1 or BRCA2 mutation.
Timepoint [1] 0 0
12 weeks after commencement of treatment
Secondary outcome [1] 0 0
Efficacy of pamiparib in combination with tislelizumab in patients with advanced tumours harbouring molecular profiles consistent with HRD, and without a known pathogenic germline BRCA1 or BRCA2 mutation
Timepoint [1] 0 0
At the end of the study, approximately 4 years after the first participant commences treatment
Secondary outcome [2] 0 0
Efficacy of pamiparib in combination with tislelizumab in patients with advanced tumours harbouring molecular profiles consistent with HRD, and without a known pathogenic germline BRCA1 or BRCA2 mutation
Timepoint [2] 0 0
At the end of the study, approximately 4 years after the first participant commences treatment
Secondary outcome [3] 0 0
Efficacy of pamiparib in combination with tislelizumab in patients with advanced tumours harbouring molecular profiles consistent with HRD, and without a known pathogenic germline BRCA1 or BRCA2 mutation
Timepoint [3] 0 0
At the end of the study, approximately 4 years after the first participant commences treatment
Secondary outcome [4] 0 0
Evaluation of CBR of pamiparib in combination with tislelizumab in patients with advanced tumours harbouring molecular profiles consistent with HRD (independent of germline BRCA1 or BRCA2 mutation status)
Timepoint [4] 0 0
12 weeks post commencement of treatment
Secondary outcome [5] 0 0
Severity of Treatment -Emergent Events (Safety of pamiparib in combination with tiselizumab)
Timepoint [5] 0 0
At the end of the study, approximately 4 years after the first participant commences treatment
Secondary outcome [6] 0 0
Determination of HRD phenotype as a predictor of response
Timepoint [6] 0 0
At the end of the study, approximately 4 years after the first participant commences treatment

Eligibility
Key inclusion criteria
1. Have provided written informed consent

2. Male or female = 18 years of age

3. Patient has documentation of at least 1 of the following genomic features associated
with HRD

- Cohort A - any of:

- A germline or somatic genetic alteration that is known or suspected to be
deleterious in one of the following HR-related genes (ATM, CDK12, PALB2,
ARID1A, ATRX, BLM, BARD1, BRIP1, CHEK1, CHEK2, FANCA, FANCF, FANCG, FANCI,
FANCL, FANCM, MSH2, NBN, RAD50, RAD51C, RAD51D, WRN)

- A somatic genetic alteration that is known or suspected to be deleterious in
BRCA1 or BRCA2

- A prevalent mutational signature 3 as determined by WGS (= 20% of total
mutations attributed)

- The presence of a positive HRD status using a NGS assay that includes
assessment for genomic instability

- Cohort A excludes high grade serous ovarian cancer, TNBC, and prostate
cancer

- Cohort B - a pathogenic germline BRCA1 or BRCA2 mutation Note: Genomic features
associated with HRD must have been determined from a sample obtained = 12 months
before the date of registration into this study with the exception of germline
genetic alterations which can have been determined from a sample obtained at any
time.

4. Patient agrees to the collection and use of their fresh tumour biopsy sample during
screening for WGS Note: A fresh tumour biopsy not required for patients who have had
WGS performed within 12 months prior to registration to the study

5. Continues to meet all the inclusion criteria as per the TRIAGE Framework protocol

6. Measurable disease, as defined by RECIST 1.1 (see Appendix 2)

7. Adequate haematological and end-organ function, defined by the following laboratory
results obtained within 7 days prior to registration, independent of blood or platelet
transfusion within 2 weeks:

- Haemoglobin = 90 g/L

- ANC = 1.5x109/L

- Platelet count = 100 x109/L

- ALT = 3.0 x the ULN, irrespective of the presence or absence of liver metastases

- AST = 3.0 x the ULN, irrespective of the presence or absence of liver metastases

- Serum bilirubin = 1.5 x ULN (On fractionation = 90% of total bilirubin should be
unconjugated.

Total bilirubin must be <4 x ULN for patients with Gilbert's Syndrome)

- Serum creatinine = 1.5x ULN or eGFR = 30 mL/min/1.73 m2 by Chronic Kidney Disease
Epidemiology Collaboration (CKD-EPI) equation (appendix 5)

- INR = 1.5x ULN (=2.5x ULN if on anticoagulants)

8. Patient has the ability to take oral medications without medical history of
malabsorption or other chronic gastrointestinal disease, or other conditions that may
harm compliance and/or absorption of the study treatment

9. WOCBP must agree to use a highly effective method of birth control for the duration of
the study and for 6 months after the last dose of study treatment (see Appendix 3),
and have a negative serum pregnancy test within 7 days of study registration

10. Non-sterile males and their female partners must agree to use a highly effective
method of birth control for the duration of the study and for 6 months after the last
dose of study treatment. Non- sterile males must avoid sperm donation for the duration
of the study and for at least 6 months after the last study drug

11. Female patient must agree not to breastfeed starting at screening and throughout the
study period, and for 6 months after the final study drug administration

12. Patient is willing and able to comply with the protocol for the duration of the study
including undergoing biopsies, treatment, and scheduled visits and examination
including follow up
Minimum age
18 Years
Maximum age
No limit
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
1. One or more of the exclusion criteria as per the TRIAGE Framework protocol applies

2. Any previous treatment with a PARP inhibitor

Note: Prior immune checkpoint blockade is permitted provided all the criteria below
are met:

- Patients must not have received the immune checkpoint blockade within 28 days of
study registration

- Patients must not have experienced a toxicity that led to permanent
discontinuation of prior immunotherapy

- All AEs while receiving prior immunotherapy must have completely resolved or
resolved to grade

1 prior to screening for this study. Patients with an endocrine AE due to
immunotherapy are permitted provided they are stably maintained on appropriate
replacement therapy and are asymptomatic

- Must not have required the use of additional immunosuppression other than
corticosteroids for the management of an AE, not have experienced recurrence of
an AE if re-challenged, and not require maintenance doses of > 10 mg prednisolone
or equivalent per day

3. Any unresolved toxicity (=CTCAE grade 2) from previous anti-cancer therapy, with the
exception of alopecia Note: Patients with irreversible toxicity that is not reasonably
expected to be exacerbated by the study treatment (e.g. hearing loss, peripheral
neuropathy) are eligible

4. Treatment with strong CYP3A inducers within 10 days (or = 5 half-lives, whichever is
shorter) prior to registration. Known need for treatment with strong CYP3A4 inducers
during study treatment.

5. Symptomatic or current history of actively progressing CNS metastases. Patients with a
history of treated CNS lesions are eligible, provided that all of the following
criteria are met:

- Measurable disease per RECIST 1.1 must be present outside the CNS

- In patients who have received CNS-directed therapy, there is no clinical evidence
of interim progression between completion of CNS-directed therapy and
registration to the study (radiological re-assessment is not required)

- The patient has not received radiotherapy within 14 days prior to registration
Note: Anticonvulsant therapy at a stable dose is permitted

Note: Patients with asymptomatic brain metastases in which CNS-directed therapy is not
indicated are eligible

6. History of leptomeningeal disease

7. Mean QTc = 470 ms calculated from triplicate ECGs using Fredericia's Correction

8. Active autoimmune disease or history of autoimmune disease that may relapse, with the
following exceptions:

- Controlled type 1 diabetes

- Hypothyroidism managed with no treatment other than with hormone replacement
therapy

- Controlled celiac disease

- Skin disease not requiring systemic treatment (e.g. vitiligo, psoriasis,
alopecia)

- Any other disease that is not expected to recur in the absence of external
triggering factors

9. Any condition that required systemic treatment with either corticosteroids (> 10 mg
daily of prednisone or equivalent) or other immunosuppressive medication within 2
weeks prior to registration, with the following exceptions:

- Adrenal replacement steroid (dose = 10 mg daily of prednisone or equivalent)

- Topical, ocular, intra-articular, intranasal, or inhalational corticosteroid with
minimal systemic absorption

- Short course (= 7 days) of corticosteroid prescribed prophylactically or for the
treatment of a non- autoimmune condition

10. Positive HIV test at screening

11. Patients with active HBV (chronic or acute; defined as having a positive HBsAg test at
screening) or HCV Note: Patients with a past or resolved HBV infection (defined as the
presence of HBcAb and absence of HBsAg) are eligible. Patients positive for HCV
antibody are eligible only if polymerase chain reaction is negative for HCV RNA

12. Patients with severe chronic or active infections requiring systemic antibacterial,
antifungal or antiviral therapy, including active tuberculosis and COVID-19

13. Patients with a history of interstitial lung disease, non-infectious pneumonitis or
uncontrolled systemic diseases, including diabetes, hypertension, pulmonary fibrosis,
acute lung diseases, etc.

14. History of non-viral hepatitis or cirrhosis

15. Any of the following cardiovascular criteria:

- Current evidence of cardiac ischemia.

- Current symptomatic pulmonary embolism.

- Acute myocardial infarction = 6 months prior to study registration.

- Heart failure of New York Heart Association Classification III or IV (See
Appendix 6) = 6 months prior to study registration.

- Grade = 2 ventricular arrhythmia = 6 months prior to study registration.

- History of cerebrovascular accident within 6 months before first dose of study
drugs.

16. Has been administered a live vaccine within 4 weeks prior to registration

17. Known sensitivity to any component of pamiparib and/or tislelizumab

Study design
Purpose of the study
Treatment
Allocation to intervention
N/A
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Open (masking not used)
Who is / are masked / blinded?



Intervention assignment
Single group
Other design features
Phase
Phase 2
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Recruiting
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
24/02/2022
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
1/08/2025
Actual
Sample size
Target
60
Accrual to date
Final
Recruitment in Australia
Recruitment state(s)
VIC
Recruitment hospital [1] 0 0
St Vincent's Hospital - Fitzroy
Recruitment hospital [2] 0 0
Austin Hospital - Heidelberg
Recruitment hospital [3] 0 0
Peter MacCallum Cancer Centre - Melbourne
Recruitment postcode(s) [1] 0 0
3065 - Fitzroy
Recruitment postcode(s) [2] 0 0
3084 - Heidelberg
Recruitment postcode(s) [3] 0 0
3000 - Melbourne

Funding & Sponsors
Primary sponsor type
Other
Name
Peter MacCallum Cancer Centre, Australia
Address
Country

Ethics approval
Ethics application status

Summary
Brief summary
This study will describe the efficacy of pamiparib in combination with tislelizumab in
patients with advanced tumours harbouring molecular profiles consistent with homologous
recombination deficiency (HRD), agnostic of tumour origin. A tumour-agnostic approach has
been adopted in this study due to the broad activity of PARP inhibitors across multiple
tumour types. In addition, response to PARP inhibitors has been demonstrated in patients with
genomic features associated with HRD, even in the absence of germline BRCA1 or BRCA2
mutations. These results suggest that the presence of HRD itself is the key predictive
biomarker for PARP inhibitor efficacy. This paves the way for a precision-oncology,
tumour-agnostic approach to patient selection for treatment, rather than the traditional
tumour site-of-origin basis for which the current PARP inhibitor approvals exist. To
investigate this, cohort A of this study includes patients with genomic features of HRD, but
without a germline BRCA1 or BRCA2 mutation. Demonstration of clinical efficacy in this cohort
will provide strong support to the tumour-agnostic, precision-oncology approach for patient
selection for PARP inhibitor or PARP inhibitor combination treatment. This forms the primary
objective of the study. The study will consist of two cohorts, broadly, cohort A - patients
without a pathogenic BRCA1 or BRCA2 mutation but with other germline or somatic mutations in
other HRD genes; cohort B- patients with a pathogenic BRCA1 or BRCA2
Trial website
https://clinicaltrials.gov/ct2/show/NCT04985721
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 0 0
Stephen Luen, MBBS
Address 0 0
Peter MacCallum Cancer Institute
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Stephen Luen, MBBS
Address 0 0
Country 0 0
Phone 0 0
+61 3 8559 5000
Fax 0 0
Email 0 0
stephen.luen@petermac.org
Contact person for scientific queries



Summary Results

For IPD and results data, please see https://clinicaltrials.gov/ct2/show/NCT04985721