New hope for Platinum-Resistant ovarian cancer: PLX038 trial launches
NCT ID NCT05465941
First seen Jun 25, 2026 · Last updated Jul 17, 2026 · Updated 4 times
Summary
This Phase II trial tests a drug called PLX038 in 43 people with ovarian, peritoneal, or fallopian tube cancer that has stopped responding to platinum-based chemotherapy. The drug works by blocking enzymes that help cancer cells grow. Researchers will check if it shrinks tumors and how long it keeps the cancer from progressing.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- PLX038 (a chemotherapy drug)
- What this could lead to
- If it works, this could offer a new treatment option for patients whose ovarian cancer has stopped responding to platinum-based chemotherapy.
- What could go wrong
- This is an early Phase II trial with only 43 participants, so results may not apply to everyone. The drug may cause side effects or fail to shrink tumors.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
-
20 people
The number who actually took part.
- Started
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Sep 2022
- Expected to finish
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Feb 2030
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age \>= 18 years NOTE: Because no dosing or adverse event data are currently available on the use of PLX038 in patients \< 18 years of age, children are excluded from this study, but will be eligible for future pediatric trials * Histological confirmed high grade serous ovarian cancer consistent with ovarian, fallopian tube, or primary peritoneal carcinoma (NOTE: Any of these diseases are referred to in this protocol as "ovarian cancer") * Recurrent high grade serous ovarian cancer that was initially platinum sensitive (i.e., had at least one platinum-free interval of at least 6 months before progression) is now platinum resistant * No more than one prior line of therapy for platinum resistant disease. NOTE: Prior poly adenosine diphosphate-ribose polymerase (PARP) inhibitor therapy is allowed * Measurable disease per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 * Disease that is amenable to two biopsies * Life expectancy greater \>= 12 weeks * Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0, 1 or 2 * Hemoglobin \>= 8.0 g/dL (obtained =\< 28 days prior to registration) * Absolute neutrophil count (ANC) \>= 1500/mm\^3 (obtained =\< 28 days prior to registration) * Platelet count \>= 100,000/mm\^3 (obtained =\< 28 days prior to registration) * Total bilirubin \>= 1.5 x upper limit of normal (ULN) (obtained =\< 28 days prior to registration) * Alanine aminotransferase (ALT) and aspartate transaminase (AST) =\< 3 x ULN (=\< 5 x ULN for patients with liver involvement) (obtained =\< 28 days prior to registration) * Calculated creatinine clearance \>= 45 ml/min using the Cockcroft-Gault formula (obtained =\< 28 days prior to registration) * Negative pregnancy test done =\< 7 days prior to registration, for persons of childbearing potential only * Provide written informed consent * Willing to return to enrolling institution for follow-up (during the Active Monitoring Phase of the study) * Willingness to provide mandatory blood specimens for correlative research * Willingness to provide mandatory tissue specimens for correlative research Exclusion Criteria: * Any of the following because this study involves an agent that has known genotoxic, mutagenic and teratogenic effects: * Pregnant persons * Nursing persons * Persons of childbearing potential who are unwilling to employ adequate contraception * Histology other than high grade serous carcinoma * Prior treatment restrictions * Chemotherapy =\< 4 weeks prior to registration * Immunotherapy =\< 4 weeks prior to registration * Radiotherapy =\< 4 weeks prior to registration * Any other investigational therapy =\< 4 weeks prior to registration * History of prior or concurrent malignancy =\< 2 years prior to registration * Exceptions: If natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen * Uncontrolled intercurrent illness including, but not limited to: * Myocardial infarction within 6 months of study entry * New York Heart Association (NYHA) class III or IV heart failure * Uncontrolled dysrhythmias or poorly controlled angina * History of serious ventricular arrhythmia (ventricular tachycardia \[VT\] or ventricular fibrillation \[VF\]) and/or factors that predispose to arrhythmia (e.g., heart failure, hypokalemia, family history of long QT syndrome) * Known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, Exception: Patients 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 IIB or better Exception: Patients who have received prior doxorubicin (Doxil) are eligible if asymptomatic with QTc =\< 480msec (Fridericia) and NYHA class IIB or better * Known human immunodeficiency virus (HIV) Exception: Patients on effective anti-retroviral therapy with undetectable viral load =\< 6 months prior to registration are eligible for this trial * Known hepatitis * Exception: For patients with evidence of chronic hepatitis B virus infection the HepB viral load must be undetectable on suppressive therapy, if indicated, to be eligible * Exception: Patients with a history of hepatitis C virus infection must have been treated and cured. Patients with HCV infection who are currently on treatment are eligible if they have an undetectable HCV viral load * Receiving any other investigational agent * History of clinically significant gastrointestinal bleeding, colitis, or gastrointestinal perforation * Co-morbid systemic illnesses or other severe concurrent disease which, in the judgment of the investigator, would make the patient inappropriate for entry into this study or interfere significantly with the proper assessment of safety and toxicity of the prescribed regimens * Requirement for anticoagulation treatment that increases international normalized ratio (INR) or activated partial thromboplastin time (APTT) above the normal range (Exceptions: low dose deep vein thrombosis \[DVT\] or line prophylaxis allowed) * Known central nervous system (CNS) disease Exception: Patients with treated brain metastases are eligible if follow-up brain imaging after CNS directed therapy shows no evidence of progression. Patients with new or progressive brain metastases (active brain metastases) or leptomeningeal disease are eligible if the treating physician determined that immediate CNS specific treatment is not required and is unlikely to be required during the 1st cycle of therapy * Known Gilbert's syndrome or homozygous for the UGT1A1\*28 variant allele or other relevant alleles with severely reduced UGT1A1 activity * Patients who require treatment with UGT1A1 inhibitors during the planned period of investigational treatment with PLX038
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Mayo Clinic
Rochester, Minnesota, 55905, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Immune cells Re-Trained to fight Drug-Resistant ovarian cancer
- Immune cells retrained to hunt ovarian cancer in new trial
- New hope for Platinum-Resistant ovarian cancer: ONC201 and paclitaxel combo trial launches
- New drug azenosertib takes on Chemo-Resistant ovarian cancer in phase 3 trial