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Combining Ipatasertib with Megestrol Acetate for Advanced Endometrial Cancer

A Phase IB and Randomized Phase II Trial of Megestrol Acetate With or Without Ipatasertib in Recurrent or Metastatic Endometrioid Endometrial Cancer

Phase1; Phase2 Interventional National Cancer Institute (NCI) · NCT05538897

This study is testing whether combining ipatasertib with megestrol acetate can help people with advanced endometrial cancer live longer without their disease getting worse.

Quick facts

PhasePhase1; Phase2
Study typeInterventional
Enrollment96 (estimated)
Ages18 Years and up
SexFemale
SponsorNational Cancer Institute (NCI) NIH
Drugs / interventionsradiation, prednisone
Locations151 sites (Tucson, Arizona and 150 other locations)
Trial IDNCT05538897 on ClinicalTrials.gov

What this trial studies

This clinical trial evaluates the safety and effectiveness of ipatasertib, an AKT inhibitor, in combination with megestrol acetate for patients with recurrent or metastatic endometrial cancer. The study is designed in two phases: the first phase focuses on determining the appropriate dosage and toxicity of the combination treatment, while the second phase compares the progression-free survival rates of patients receiving the combination versus those receiving megestrol acetate alone. Patients will undergo imaging assessments and biomarker evaluations to further understand the treatment's impact.

Who should consider this trial

Good fit: Ideal candidates include women aged 18 and older with grade 1 or 2 recurrent or metastatic endometrioid endometrial cancer who have measurable disease.

Not a fit: Patients with non-endometrioid types of endometrial cancer or those who have not completed prior hormonal therapy at least 6 months before registration may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment combination could provide a more effective option for patients with advanced endometrial cancer.

How similar studies have performed: Other studies have shown promise in using targeted therapies like AKT inhibitors in combination with hormonal agents, suggesting potential for success in this approach.

Eligibility criteria

Show full inclusion / exclusion criteria 
Inclusion Criteria:

* Patients must have grade 1 or 2 recurrent or metastatic endometrioid endometrial cancer
* Patients must have measurable disease according to RECIST version (v)1.1. Measurable disease is defined as at least one lesion that can be accurately measured in at least one dimension (longest diameter to be recorded). Each lesion must be \>= 10 mm when measured by CT or MRI. Lymph nodes must be \>= 15 mm in short axis when measured by CT or MRI. Previously irradiated lesions can be considered as measurable disease only if progressive disease has been unequivocally documented at that site since radiation
* Patients may have received unlimited prior lines of therapy. If patient received prior hormonal therapy (e.g., megestrol acetate, medroxyprogesterone acetate, aromatase inhibitor, tamoxifen, fulvestrant) it must have completed at least 6 months prior to registration
* Age \>= 18
* Eastern Cooperative Oncology Group (ECOG) Performance Status of 0, 1 or 2
* Platelets \>= 100,000/mcl within 14 days prior to registration
* Absolute neutrophil count (ANC) \>= 1,500/mcl within 14 days prior to registration
* Hemoglobin \>= 9 g/dL within 14 days prior to registration
* Glomerular filtration rate (GFR) \>= 60 mL/min/1.73m\^2 measured using Cockcroft-Gault equation or the estimated glomerular filtration rate from the Modification of Diet in Renal Disease Study within 14 days prior to registration
* Total bilirubin =\< 1.5 x the upper limit of normal (ULN) within 14 days prior to registration

  * Patients with known Gilbert syndrome who have bilirubin =\< 3 x ULN may be enrolled
* Aspartate aminotransferase (AST) (serum glutamic oxaloacetic transaminase \[SGOT\])/alanine aminotransferase (ALT) (serum glutamate pyruvate transaminase \[SGPT\]) =\< 3 x institutional ULN within 14 days prior to registration
* Albumin \>= 3 g/dL within 14 days prior to registration
* Patients with known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the New York Heart Association Functional Classification. To be eligible for this trial, patients should be class 2B or better
* The effects of ipatasertib on the developing human fetus are unknown. For this reason and because AKT inhibitor agents as well as other therapeutic agents used in this trial are known to be teratogenic, participants of child-bearing potential must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) during study therapy and for 28 days following the last dose of study therapy. Should a participant become pregnant or suspect pregnancy while participating in this study, they should inform their treating physician immediately
* Patients with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen are eligible for this trial
* For patients with known human immunodeficiency virus (HIV), hepatitis B virus (HBV), and/or hepatitis C virus (HCV) infection:

  * HIV-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months of registration are eligible for this trial
  * Patients with evidence of chronic hepatitis B virus (HBV) infection must have an undetectable HBV viral load on suppressive therapy, if indicated
  * Patients with a history of hepatitis C virus (HCV) infection must have been treated and cured. For patients with HCV infection who are currently on treatment, they are eligible if they have an undetectable HCV viral load
* Patients with treated brain metastases are eligible if follow-up brain imaging after central nervous system (CNS)-directed therapy shows no evidence of progression
* Patients must be able to swallow and retain oral medications and not have gastrointestinal illnesses that would preclude absorption of megestrol acetate or ipatasertib as judged by the treating physician
* The patient or a legally authorized representative must provide study-specific informed consent prior to study entry and, for patients treated in the United States (U.S.), authorization permitting release of personal health information

Exclusion Criteria:

* Patients who have had prior treatment with an AKT inhibitor (Prior treatment with PI3K or mTOR inhibitors is allowed)
* Patients who have received treatment with strong CYP3A inhibitors or inducers within 14 days or 5 drug-elimination half-lives, whichever is longer, prior to study registration

  * Because the lists of these agents are constantly changing, it is important to regularly consult a frequently-updated medical reference. As part of the enrollment/informed consent procedures, the patient will be counseled on the risk of interactions with other agents, and what to do if new medications need to be prescribed or if the patient is considering a new over-the-counter medicine or herbal product
* Patients with diabetes either requiring insulin therapy or with a baseline fasting glucose \> 160 mg/dL and/or high glycosylated hemoglobin A1c (HbA1c) (\> 8), suggesting poorly controlled diabetes. Fasting is defined as abstaining from food and drink (with the exception of water) for at least 8 hours
* Patients who require chronic corticosteroid therapy of \> 10 mg of prednisone per day or an equivalent dose of other anti-inflammatory corticosteroids or immunosuppressant agents for a chronic disease
* Patients with grade 2 or greater uncontrolled or untreated hypercholesterolemia (\> 300 mg/dL) or hypertriglyceridemia (\> 300 mg/dL)
* Patients with a history of known or active inflammatory bowel disease (e.g., Crohn disease and ulcerative colitis) or active bowel inflammation (e.g., diverticulitis)
* Patients with a history of or presence of an abnormal electrocardiogram (ECG) that is clinically significant in the investigator's opinion (including complete left bundle branch block, second- or third-degree heart block, or evidence of prior myocardial infarction)
* Patients with known clinically significant history of liver disease consistent with Child-Pugh class B or C, including active viral or other hepatitis, current drug or alcohol abuse, or cirrhosis
* Patients with lung disease: Grade 2 or greater pneumonitis, grade 2 or greater interstitial lung disease, idiopathic pulmonary fibrosis, cystic fibrosis, aspergillosis, active tuberculosis, or history of opportunistic infections (pneumocystis pneumonia or cytomegalovirus pneumonia) within the past 6 months
* No active infection requiring parenteral antibiotics
* Women who are pregnant or unwilling to discontinue nursing

Where this trial is running

Tucson, Arizona and 150 other locations

+101 more sites — see ClinicalTrials.gov for the full list.

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
View on ClinicalTrials.gov → Find more trials like this →
Conditions FIGO Grade 1 Endometrial Endometrioid AdenocarcinomaFIGO Grade 2 Endometrial Endometrioid AdenocarcinomaMetastatic Endometrial Endometrioid AdenocarcinomaRecurrent Endometrial Endometrioid Adenocarcinoma
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.