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Adrenocortical CarcinomaPhase 2NCT05634577

A Phase II Study to Evaluate the Efficacy and Safety of Pembrolizumab in Combination With Mitotane in Patients With Advanced Adrenocortical Carcinoma

A Phase 2 study testing Mitotane and Pembrolizumab in people with Adrenocortical Carcinoma, run by M.D. Anderson Cancer Center at 1 site in United States.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

To learn if adding pembrolizumab to mitotane can help to control ACC. The safety of this drug combination will also be studied. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Adrenocortical Carcinoma
What is being tested?
Mitotane and Pembrolizumab
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
3 participants
Where
1 siteUnited States
Study dates
23 Mar 2023to 10 Jul 2024
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Participants are eligible to be included in the study only if all of the following criteria apply:
  • 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.
  • 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.
  • 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:
  • a. Not a woman of childbearing potential (WOCBP) as defined in Appendix 3 OR
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  • 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.
  • The participant (or legally acceptable representative if applicable) provides written informed consent for the trial.
  • 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.
  • 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.
  • 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.
  • 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).
  • For patients receiving therapeutic anticoagulation: stable anticoagulant regimen in the 28 days immediately preceding initiation of study treatment
  • 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.

Who cannot join

  • Participants are excluded from the study if any of the following criteria apply:
  • 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.
  • 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).
  • Has received prior systemic anti-cancer therapy including investigational agents within 4 weeks
  • 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.
  • 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.
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  • 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.
  • 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.
  • 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.
  • Has severe hypersensitivity (≥Grade 3) to pembrolizumab and/or any of its excipients.
  • 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.
  • Has a history of (non-infectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease.
  • Has an active infection requiring systemic therapy.
  • Has a known history of Human Immunodeficiency Virus (HIV) infection
  • 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
  • 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.
  • Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial.
  • 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.
  • Has had an allogenic tissue/solid organ transplant.

Trial locations and contacts

1 site in 1 country.

United States1 site

  • M D Anderson Cancer Center

    Houston, Texas, 77030

Other trials in United States

About this study

To learn if adding pembrolizumab to mitotane can help to control ACC. The safety of this drug combination will also be studied.

Read the detailed 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:

  1. Overall survival (OS), defined as the time from combination therapy to death from any cause.
  2. Progression Free Survival (PFS), defined as the time from the start of combination therapy phase to disease progression or death from any cause.
  3. Explore the association between MT level and response to therapy
  4. 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.

  1. 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.
  2. 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
Being tested
Mitotane, Pembrolizumab
Medical subject headings
Adrenocortical Carcinoma

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

Study groups in NCT05634577
Study groupRoleWhat they receive
Lead-in PhaseExperimentalParticipants will first have a Lead-in Phase in which participants receive only mitotane. This will be 4 weeks long in most participants. Participants will then begin receiving pembrolizumab.
Receives: Drug: Mitotane; Drug: Pembrolizumab

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Overall Response Rate

    Assessment of tumor reduction by RECIST1.1 criteria

    Measured: From time of active itervention (Combination therapy)

Secondary outcomes (3)

  1. Overall Survival

    Measured: Overall survival (OS), defined as the time from combination therapy to death from any cause.

  2. Progression Free Survival

    Measured: Progression Free Survival (PFS), defined as the time from the start of combination therapy phase to disease progression or death from any cause.

  3. Side Effects and Relationship Between Response and Drug Level

    Measured: Explore the association between MT level and response to therapy Safety assessment by the Common Terminology Criteria for Adverse Events (CTCAE) V5.0

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted2 Dec 2022
  2. Study start23 Mar 2023
  3. Primary completion10 Jul 2024
  4. Study completion10 Jul 2024

Why it stopped: Slow accrual

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
3 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05634577
Sponsor's protocol ID
2022-0705
Other IDs
NCI-2022-10009
Status last verified
Jun 2025
First submitted
22 Nov 2022
Last updated
19 Jun 2025
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Mitotane and Pembrolizumab in people with Adrenocortical Carcinoma, run by M.D. Anderson Cancer Center at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 41 inclusion and 22 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 19 Jun 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 19 Jun 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Overall Response Rate (time frame: From time of active itervention (Combination therapy)). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05634577.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Jun 2025.

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