Overview
To learn if adding pembrolizumab to mitotane can help to control ACC. The safety of this drug combination will also be studied.
Description
Primary Objective(s), Hypothesis(es), and Endpoint(s):
(1) Objective: Assess the clinical efficacy of the combined use of MT with PEM in patients with advanced ACC.
Hypothesis: We hypothesize that adding PEM will enhance the clinical efficacy of MT. This additive/synergistic effect could be related to the intrinsic adrenolytic activity of MT that could lead to antigens exposures to immune cells. Furthermore, the cortisol lowering effect of mitotane is expected to alter the tumor microenvironment leading to a change the milieu of the tumor infiltrating immune cells to make ACC more susceptible to PEM. Also, cortisol lowering can reduce lymphocytes inhibition and enhances the efficacy of PEM.
Primary Endpoint: Overall response rate (ORR) assessed objectively using RECIST 1.1 criteria defined as the percentage of patients who have a partial or complete response to the combined treatment of MT plus PEM
Secondary Objective(s), Hypothesis(es), and Endpoint(s):
(1) Objective: Evaluate the safety and efficacy of the combined use of MT plus PEM in patients with advanced ACC.
Hypothesis: The optimal MT plasma levels have not been established prospectively in metastatic ACC. We hypothesize that mitotane level of 14-20 mg/L is associated with oncological responses, but we also anticipate that the combined use of PEM MT could be associated with responses at lower levels of MT which might be associated with more favorable AE profile of MT.
Secondary Endpoints:
- Overall survival (OS), defined as the time from combination therapy to death from any cause.
- Progression Free Survival (PFS), defined as the time from the start of combination therapy phase to disease progression or death from any cause.
- Explore the association between MT level and response to therapy
- Safety assessment by the Common Terminology Criteria for Adverse Events (CTCAE) V5.0
Exploratory Objective(s):
(1) Objective: Correlate safety and efficacy data with steroid profile, immune markers and MT levels.
- Obtain optional tumor biopsy prior to, during, and after treatment with MT/PEM combination to study immune markers such as infiltrating tumor lymphocytes, and other immune markers during therapy.
- Study the changes in circulating markers (MT level, immune cytokines, steroid profile) in blood samples obtained prior to, during, and after treatment with MT/PEM combination
Eligibility
Inclusion Criteria:
Participants are eligible to be included in the study only if all of the following criteria
apply:
1. Male/female participants who are at least 18 years of age on the day of signing
informed consent with histologically confirmed diagnosis of ACC will be enrolled in
this study.
2. Male participants:
A male participant must agree to use a contraception as detailed in Appendix 3 of this
protocol during the treatment period and an additional 180 days after the last dose of
study treatment and refrain from donating sperm during this period.
3. Female participants: A female participant is eligible to participate if she is not
pregnant (see Appendix 3), not breastfeeding, and at least one of the following
conditions applies:
1. a. Not a woman of childbearing potential (WOCBP) as defined in Appendix 3 OR
2. A WOCBP who agrees to follow the contraceptive guidance in Appendix 3 during the
treatment period plus 180 days after the last dose of study treatment.
4. The participant (or legally acceptable representative if applicable) provides written
informed consent for the trial.
5. Have measurable disease based on RECIST 1.1. Lesions situated in a previously
irradiated area are considered measurable if progression has been demonstrated in such
lesions.
6. Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1.
Evaluation of ECOG is to be performed within 10 days prior to the first dose of MT
therapy.
7. Have adequate organ function as defined in the following table (Table 4). Specimens
must be collected within 10 days prior to the start of study intervention.
8. The study will accept therapy naïve patients with metastatic ACC, patients who failed
one prior line of therapy not including immunotherapy, patients who started MT within
4 weeks for metastatic disease, and patients who developed metastases while on
adjuvant mitotane therapy. Patients who failed platinum-based chemotherapy combined
with MT may be eligible to join the study at the discretion of the PI if their
treatment ended > 6 months before consenting for this study or if did not achieve
therapeutic MT levels during prior treatment (MT level ≥ 14 mg/L).
9. For patients receiving therapeutic anticoagulation: stable anticoagulant regimen in
the 28 days immediately preceding initiation of study treatment
10. Criteria for known Hepatitis B and C positive subjects
Hepatitis B and C screening tests are not required unless:
- Known history of HBV or HCV infection
- As mandated by local health authority
10.1 Hepatitis B positive subjects
- Participants who are HBsAg positive are eligible if they have received HBV antiviral
therapy for at least 4 weeks and have undetectable HBV viral load prior to
randomization.
- Participants should remain on anti-viral therapy throughout study intervention and
follow local guidelines for HBV anti-viral therapy post completion of study
intervention.
10.2 Participants with history of HCV infection are eligible if HCV viral load is
undetectable at screening.
Participants must have completed curative anti-viral therapy at least 4 weeks prior to
randomization.
Table 4 Adequate Organ Function Laboratory Values System Laboratory Value
- Hematological
- Absolute neutrophil count (ANC) ≥1500/µL
- Platelets ≥100 000/µL
- Hemoglobin ≥9.0 g/dL or ≥5.6 mmol/La
- Renal
- Creatinine OR Measured or calculated b creatinine clearance (GFR can also be used in
place of creatinine or CrCl) ≤1.5 × ULN OR
≥30 mL/min for participant with creatinine levels >1.5 × institutional ULN
- Hepatic
- Total bilirubin ≤1.5 ×ULN OR direct bilirubin ≤ULN for participants with total
bilirubin levels >1.5 × ULN
- AST (SGOT) and ALT (SGPT) ≤2.5 × ULN (≤5 × ULN for participants with liver metastases)
Coagulation
- International normalized ratio (INR) OR prothrombin time (PT)
- Activated partial thromboplastin time (aPTT) ≤1.5 × ULN unless participant is
receiving anticoagulant therapy as long as PT or aPTT is within therapeutic range of
intended use of anticoagulants
- ALT (SGPT)=alanine aminotransferase (serum glutamic pyruvic transaminase);
- AST (SGOT)=aspartate aminotransferase (serum glutamic oxaloacetic transaminase);
- GFR=glomerular filtration rate; ULN=upper limit of normal.
a Criteria must be met without erythropoietin dependency and without packed red blood cell
(pRBC) transfusion within last 2 weeks.
b Creatinine clearance (CrCl) should be calculated per institutional standard.
Note: This table includes eligibility-defining laboratory value requirements for treatment;
laboratory value requirements should be adapted according to local regulations and
guidelines for the administration of specific chemotherapies.
Exclusion Criteria:
Participants are excluded from the study if any of the following criteria apply:
1. A WOCBP who has a positive urine pregnancy test within 72 hours prior to pembrolizumab
treatment (see Appendix 3). If the urine test is positive or cannot be confirmed as
negative, a serum pregnancy test will be required.
2. Has received prior therapy with an anti-PD-1, anti-PD-L1, or anti PD L2 agent or with
an agent directed to another stimulatory or co-inhibitory T-cell receptor (eg, CTLA-4,
OX 40, CD137).
3. Has received prior systemic anti-cancer therapy including investigational agents
within 4 weeks
4. Has received prior radiotherapy within 2 weeks of start of study intervention.
Participants must have recovered from all radiation-related toxicities, not require
corticosteroids, and not have had radiation pneumonitis. A 1-week washout is permitted
for palliative radiation (≤2 weeks of radiotherapy) to non-CNS disease.
5. Has received a live vaccine or live-attenuated vaccine within 30 days before the first
dose of study intervention. Administration of killed vaccines is allowed.
6. Is currently participating in or has participated in a study of an investigational
agent or has used an investigational device within 4 weeks prior to the first dose of
study intervention.
7. Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy
(in dosing exceeding 10 mg daily of prednisone equivalent at the time of screening) or
any other form of immunosuppressive therapy within 7 days prior to the first dose of
study drug. Higher dose of steroid may be permitted as replacement doses while on
mitotane therapy to follow acceptable standards of care while on mitotane Known
additional malignancy that is progressing or has required active treatment within the
past 2 years. Note: Participants with basal cell carcinoma of the skin, squamous cell
carcinoma of the skin or carcinoma in situ, excluding carcinoma in situ of the
bladder, that have undergone potentially curative therapy are not excluded.
8. Has known active CNS metastases and/or carcinomatous meningitis. Participants with
previously treated brain metastases may participate provided they are radiologically
stable, i.e. without evidence of progression for at least 4 weeks by repeat imaging
(note that the repeat imaging should be performed during study screening), clinically
stable and without requirement of steroid treatment for at least 14 days prior to
first dose of study intervention.
9. Has severe hypersensitivity (≥Grade 3) to pembrolizumab and/or any of its excipients.
10. Has active autoimmune disease that has required systemic treatment in the past 2 years
(i.e. with use of disease modifying agents, corticosteroids or immunosuppressive
drugs). Replacement therapy (e.g., thyroxine, insulin, or physiologic corticosteroid
replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a
form of systemic treatment and is allowed.
11. Has a history of (non-infectious) pneumonitis/interstitial lung disease that required
steroids or has current pneumonitis/interstitial lung disease.
12. Has an active infection requiring systemic therapy.
13. Has a known history of Human Immunodeficiency Virus (HIV) infection
14. Concurrent active Hepatitis B (defined as HBsAg positive and/or detectable HBV DNA)
and Hepatitis C virus (defined as anti-HCV Ab positive and detectable HCV RNA)
infection.
Note: Hepatitis B and C screening tests are not required unless:
- Known history of HBV and HCV infection
- As mandated by local health authority
15. Has a history or current evidence of any condition, therapy, or laboratory abnormality
or other circumstance that might confound the results of the study, interfere with the
participant's participation for the full duration of the study, such that it is not in
the best interest of the participant to participate, in the opinion of the treating
investigator.
16. Has known psychiatric or substance abuse disorders that would interfere with
cooperation with the requirements of the trial.
17. Is pregnant or breastfeeding or expecting to conceive or father children within the
projected duration of the study, starting with the screening visit through 120 days
after the last dose of trial treatment.
18. Has had an allogenic tissue/solid organ transplant.