Table of Contents
- What is TransCon IL-2β/γ?
- How does it work?
- What cancers can it treat?
- Clinical trials
- Potential benefits
- Side effects and safety
- Future outlook
What is TransCon IL-2β/γ?
TransCon IL-2β/γ is a new type of cancer treatment being developed by Ascendis Pharma. It is a modified version of a protein called interleukin-2 (IL-2) that occurs naturally in the body[1]. IL-2 plays an important role in activating the immune system to fight cancer. However, regular IL-2 can cause severe side effects when given as a treatment. TransCon IL-2β/γ is designed to provide the benefits of IL-2 while reducing side effects.
How does it work?
TransCon IL-2β/γ works by stimulating and boosting the immune system to fight cancer cells. Specifically, it activates and increases certain types of immune cells called T cells and natural killer cells that can recognize and attack tumors[1]. The “TransCon” technology allows the IL-2 to be released slowly in the body over time, which may help improve its effectiveness and reduce side effects compared to regular IL-2 treatment.
What cancers can it treat?
TransCon IL-2β/γ is being studied for the treatment of several types of advanced or metastatic solid tumors (cancers that form solid masses). These include[2]:
- Melanoma (a type of skin cancer)
- Non-small cell lung cancer
- Small cell lung cancer
- Ovarian cancer
- Cervical cancer
- Breast cancer (specifically HER2-positive breast cancer)
It is being tested both alone and in combination with other cancer treatments like chemotherapy and immunotherapy drugs.
Clinical trials
TransCon IL-2β/γ is currently being studied in clinical trials to determine if it is safe and effective for treating cancer in humans. Two main clinical trials are ongoing:
1. The BelieveIT-201 trial is testing TransCon IL-2β/γ in combination with other treatments for patients with advanced head and neck cancer[1]. This trial is comparing different treatment combinations to see which works best.
2. The IL Believe trial is a larger study looking at TransCon IL-2β/γ alone and combined with various other treatments for patients with different types of advanced solid tumors[2]. This trial has multiple parts to test the drug’s safety and effectiveness in different situations.
Potential benefits
Some potential benefits being investigated for TransCon IL-2β/γ include:
- Activating the immune system to fight cancer more effectively
- Possibly improving response rates to treatment compared to existing therapies
- Potentially helping patients whose cancer has stopped responding to other immunotherapy drugs
- Reducing tumor size before surgery in some cancers
- Possibly extending survival time for patients with advanced cancers
However, it’s important to note that these potential benefits are still being studied and have not yet been proven in large clinical trials[2].
Side effects and safety
As TransCon IL-2β/γ is still in clinical trials, all of its possible side effects are not yet known. The main goal of current studies is to evaluate its safety and determine the right dose to use[2]. Some potential side effects being monitored include:
- Immune system reactions
- Fatigue
- Fever
- Nausea
- Changes in blood cell counts
Patients in clinical trials are closely monitored for any adverse reactions. The researchers are working to find the best dose that provides cancer-fighting benefits while minimizing side effects.
Future outlook
TransCon IL-2β/γ is still in the early stages of development, but it shows promise as a potential new treatment option for patients with advanced cancers. If current clinical trials show positive results, larger studies will be needed before it could potentially become available as an approved treatment[2].
Researchers hope that by modifying IL-2, they can harness its cancer-fighting abilities while making it safer and more effective for patients. However, more research is needed to fully understand the benefits and risks of this new therapy.



