A trial of TT-702 for solid tumours that have spread (CURATE)

Cancer type:

All cancer types
Secondary cancers




Phase 1/2

This trial is looking at a new drug called TT-702 for solid tumours Open a glossary item. It is for people who have:

  • cancer that has spread elsewhere in the body. This is advanced or metastatic cancer.
  • no standard treatment option available 

Solid tumours are any type of cancer apart from blood cancers such as leukaemia.

Cancer Research UK supports this trial.

More about this trial

Doctors are looking for new treatments for people with advanced cancer when other treatments have stopped working. In this trial they are looking to see if a drug called TT-702 might help.

TT-702 is a targeted treatment Open a glossary item called a small molecule drug. It targets a receptor on cells called the A2B receptor. Cancer cells have more A2B receptors on their surface than normal cells. This causes the cancer cells to grow. It also helps the cancer to hide from the immune system Open a glossary item.  

When you take TT-702 it changes into a more active form of the drug called TT-478. TT-478 targets and blocks the A2B receptor. This causes the cancer cell to die. Researchers also hope it will kick start your immune system to find and kill cancer cells. 

This trial is in 2 parts. Part 1 is looking at the best dose of TT-702. This part is open for people to join. 

Part 2 will test this dose in a larger number of people. This part of the trial isn’t open yet. 

This is the first time people are having TT-702. 

The main aims of the trial are to find out:

  • the best dose of TT-702 to have 
  • what happens to the drug in the body
  • how well treatment works
  • more about the side effects

Please note, the trial team also plan to look at TT-702 in combination with other treatments such as immunotherapy. We plan to add information about these groups when they open.

Who can enter

The following bullet points are a summary of the entry conditions for this trial. Talk to your doctor or the trial team if you are unsure about any of these. They will be able to advise you. 

Who can take part

You may be able to join this trial if all of the following apply. You:

  • have a solid tumour and standard treatment has stopped working, there is no suitable treatment available for you to have or you have decided not to have it
  • have had a scan that shows your cancer is getting worse or if you have prostate cancer blood tests indicate your cancer is worse. Your doctor will know this. 
  • have a sample of cancer tissue (biopsy) Open a glossary item available for the trial team to do some tests on or you are willing to give new samples
  • are willing to provide blood and tissue samples as part of the trial. The team will explain more about this. 
  • are well enough to carry out all your normal activities but might not be able to do heavy physical work (performance status of 0 or 1)
  • are willing to use reliable contraception during the trial and for a period after if there is any chance you or your partner could become pregnant 
  • are at least 16 years old 

As well as the above, you may be able to join part 2 if you have one of the following:

  • prostate cancer and you have already had treatment such as abiraterone 
  • triple negative breast cancer 
  • mismatch repair deficient cancers Open a glossary item . These are cancers that usually have changes in certain genes that are involved in correcting mistakes.
There are specific entry conditions for each of these three groups in part 2. The trial team will check these to see if you are suitable to join part 2 of the trial when it opens.


Who can’t take part

Cancer related
You cannot join this trial if any of these apply. You:

  • have had radiotherapy unless it was to treat symptoms, hormone therapy Open a glossary item, chemotherapy, immunotherapy Open a glossary item or an experimental treatment in the last 4 weeks (or in the last 6 weeks if you had nitrosoureas Open a glossary item or mitomycin C)
  • have cancer that has spread to the brain or membranes around the brain unless it isn’t causing symptoms, has been treated and is stable and you don’t need to take steroids
  • have had a bone marrow transplant Open a glossary item or radiotherapy to more than a quarter of your bone marrow in the last 8 weeks 
  • have side effects from past treatments unless they are mild. This is apart from hair loss or a side effect that the team don’t think will affect you taking part. 
  • have had bad side effects to immunotherapy that affected your immune system or you still have moderate side effects 
  • have had another cancer. This is apart from carcinoma in situ (CIS) Open a glossary item of the cervix or non melanoma skin cancer Open a glossary item. You may be able to take part if you had another cancer in the past, there have been no signs of it for at least 5 years and it’s unlikely to come back.
  • are taking part in another trial or plan to join another trial while taking part in this one unless it doesn’t involve a treatment 

Medical conditions
You cannot join this trial if any of these apply. You:

  • have had a heart attack in the last 6 months or a significant heart problem Open a glossary item that needs treatment. The trial team check if you have a heart condition before you join the trial. 
  • have had a stroke Open a glossary item or mini stroke in the last 6 months
  • have an autoimmune disease Open a glossary item
  • have a problem with how your immune system works 
  • have scarring (fibrosis Open a glossary item) in the body such as lung fibrosis. Your doctor will know this. 
  • have a liver problem Open a glossary item
  • have had an organ transplant Open a glossary item in the past
  • have diabetes that isn’t well controlled with medication 
  • are taking steroids unless it is to replace hormones in the body or you are having a low dose 
  • have had major surgery to your chest or tummy (abdomen) and you aren’t better
  • have an active infection of HIV, hepatitis B, hepatitis C or any other infection that needs treatment
  • have any other medical condition or mental health problem that the trial team think would affect you taking part 

You can’t join this trial if any of these apply. You:

  • have had a live vaccination Open a glossary item within a month of joining the trial. Please note that the current approved COVID-19 vaccines are allowed as they aren’t live. 
  • are allergic to TT-702, TT-478 or anything they contain
  • take any medication that blocks an enzyme called CYP3A 
  • are pregnant or breastfeeding

Trial design

This phase 1/2 trial is taking place in the UK. There are 2 parts. Part 1 is looking at the best dose of TT-702 to have. Part 2 is testing this dose in more people.

Part 1 (dose expansion part) – this is open
The team need 24 people to join part 1. The first few people taking part have a low dose of TT-702. The next few people have a higher dose if they didn’t have any serious side effects. And so on, until they find the best dose. This is a dose escalation trial.

Part 2 (dose expansion part) – this isn’t open yet 
The team need 90 people to join part 2. When they find the best dose in part 1 then part 2 can begin. This part tests the best dose in a larger number of people. There are 3 groups:

Everyone in part 2 has the same dose of TT-702. 

How you have treatment 
TT-702 is a tablet. You take it once a day every day. You have treatment for up to a year as long as it is working and the side effects aren’t too bad. 

The number of tablets you take depends on when you join the trial. You fill in a medication diary. You record when you take your tablets and how many you take.  

On some of the days you attend the hospital, the team may ask you to bring your tablets in with you and take them when you are at your visit. This is likely to be on the days that you are having extra blood tests for research. The trial nurse will mark these days on your diary card.

You stop treatment if your cancer gets worse. The trial doctor will talk to you about other treatment options. 

Blood and tissue samples for research 
The team ask you to give some extra blood samples. Where possible, you have these at the same time as your routine blood tests.

They plan to use the samples to:

  • see how well the treatment is working 
  • see what happens to TT-702 in the body 
  • look for substances called biomarkers Open a glossary item to help work out why treatment might work for some people and not for others
  • look at genes Open a glossary item on the cancer cells 

You don’t have to give all the extra samples if you don’t want to. You can still take part in the main trial. 

Depending on when you join the trial you might need to give some extra tissue samples. The trial team will let you know if this applies to you.

Hospital visits

You see the doctor and have some tests before you can take part. These include:

  • a physical examination Open a glossary item
  • heart trace (ECG Open a glossary item)
  • blood tests
  • urine tests
  • bone scan if you have prostate cancer
  • CT scan or MRI scan

You have regular check ups with the trial doctor. At each visit you have some blood tests and a heart trace.

For the first few visits you’ll be at the hospital for most of the day. On the first day of treatment you may need to stay overnight. The rest of the hospital visits take about half a day. 

You have a CT scan or an MRI scan every:

  • 9 weeks for 6 months and then 
  • every 12 weeks 

You also have a bone scan every 9 weeks if you have prostate cancer. You stop having these scans if your cancer gets worse. 

Follow up 
When you finish treatment you see the doctor 3 weeks later for a check up and some tests. 

The team then follow you up every 3 months at a routine hospital appointment. Or they may call you at home to see how you are getting on. They might also check your hospital notes. 

Side effects

The trial team monitor you during treatment and afterwards. Contact your advice line or tell your doctor or nurse if any side effects are bad or not getting better. 

As TT-702 is a new drug there may be side effects we don’t know about yet. The possible side effects include:

There is a small chance that TT-702 might make your skin more sensitive to the sun. The trial team recommend that you apply sunscreen and lip balm that is sun protection factor 30 (SPF30) or higher and avoid long periods out in the sun.

The trial doctor will talk to you about all the possible side effects of treatment.



Recruitment start:

Recruitment end:

How to join a clinical trial

Please note: In order to join a trial you will need to discuss it with your doctor, unless otherwise specified.

Please note - unless we state otherwise in the summary, you need to talk to your doctor about joining a trial.

Chief Investigator

Professor Johann De Bono

Supported by

Cancer Research UK 
Teon Therapeutic

Other information

This is Cancer Research UK trial number CRUKD/21/005.

If you have questions about the trial please contact our cancer information nurses

Freephone 0808 800 4040

Last review date

CRUK internal database number:


Please note - unless we state otherwise in the summary, you need to talk to your doctor about joining a trial.

Last reviewed:

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