Table of Contents
- What is EP0031?
- How Does EP0031 Work?
- What Cancers Can EP0031 Treat?
- Clinical Trial Details
- Expected Outcomes
- Safety and Side Effects
What is EP0031?
EP0031 is a new medication being studied for the treatment of certain types of cancer[1]. It is described as a potent next-generation selective RET-inhibitor (SRI). To understand this, let’s break it down:
- RET-inhibitor: This means the drug targets and blocks a specific protein called RET, which is involved in some types of cancer.
- Next-generation: EP0031 is designed to be more effective than earlier treatments that target RET.
- Selective: The drug is designed to specifically target RET, potentially reducing side effects on other parts of the body.
How Does EP0031 Work?
EP0031 works by targeting cancers that have changes (alterations) in the RET gene[1]. These alterations can cause cancer cells to grow and spread. By blocking the effects of these RET alterations, EP0031 aims to slow down or stop the growth of cancer cells.
Importantly, EP0031 is designed to be effective against a wide range of RET alterations, including both RET fusions and RET mutations[1]. This means it could potentially help patients with different types of RET-altered cancers.
What Cancers Can EP0031 Treat?
EP0031 is being studied for the treatment of several types of advanced RET-altered malignancies (cancers with changes in the RET gene that have spread or are in late stages)[1]. These include:
- RET fusion-positive Non-Small Cell Lung Cancer (NSCLC): A type of lung cancer with specific RET gene changes.
- RET mutation-positive Medullary Thyroid Cancer (MTC): A type of thyroid cancer with RET gene mutations.
- Other RET-altered solid tumors: This could include various types of cancers that have RET gene changes.
Clinical Trial Details
EP0031 is currently being studied in a clinical trial to determine its safety and effectiveness[1]. Here are some key points about the trial:
- It’s a Phase I/II study, which means it’s testing both the safety and effectiveness of the drug.
- The study is “modular” and “open-label”, meaning it has different parts and participants know they’re receiving EP0031.
- Patients take EP0031 capsules once daily until their disease progresses, they experience unacceptable side effects, or they choose to withdraw from the study.
- The study includes patients who have previously received first-generation SRI therapy and those who haven’t.
Expected Outcomes
The clinical trial is looking at several important outcomes[1]:
- Safety: The study will measure how many patients experience serious side effects (called Dose-Limiting Toxicities or DLTs) in the first 28 days of treatment.
- Effectiveness: The study will measure the Overall Response Rate (ORR), which shows how many patients’ tumors shrink or disappear after treatment.
- How the body processes the drug (pharmacokinetics):
- How much of the drug is in the blood over time (AUC)
- The highest level of the drug in the blood (Cmax)
- How long it takes for the drug level to decrease by half (Half-life)
Safety and Side Effects
While EP0031 is designed to be more selective and potentially have fewer side effects than earlier treatments, all medications can have side effects[1]. The clinical trial is carefully monitoring patients for any side effects, especially in the first 28 days of treatment.
It’s important to note that EP0031 is still being studied, and we don’t yet know all of its potential side effects. Patients in the trial will be closely monitored by their healthcare team.



