Can a simple risk score keep breast cancer patients on their targeted therapy?
NCT ID NCT07817056
First seen Sep 14, 2026 · Last updated Sep 15, 2026 · Updated 1 time
Summary
Inavolisib treats certain PIK3CA-mutated, HR-positive, HER2-negative breast cancers but can raise blood sugar. Researchers at Tianjin Medical University Cancer Institute and Hospital are studying whether matching blood sugar monitoring and preventive metformin to each patient's risk level helps people stay on treatment. The study enrolls 100 adults starting inavolisib for the first time. It tracks high blood sugar events and how long patients continue the drug.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- inavolisib, a targeted breast cancer drug, plus a risk-based blood sugar management plan that may include metformin
- What this could lead to
- If the strategy works, doctors could use a simple risk score to decide who needs extra blood sugar protection, helping more patients stay on inavolisib and keep their cancer treatment on track.
- What could go wrong
- This is a small, real-world study of 100 people, not a randomized trial, so results may reflect local practice rather than the strategy itself. Metformin can cause stomach upset, and some patients may still develop serious high blood sugar or need to stop inavolisib.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 100 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Apr 2026
- Expected to finish
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Oct 2028
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.
Who is studied
Patients with PIK3CA-mutated, HR+/HER2- locally advanced or metastatic breast cancer receiving inavolisib in combination with endocrine therapy at participating oncology centers and hospitals in China.
- 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.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Aged 18 years or older at the time of signing the informed consent form * Diagnosed with PIK3CA-mutated, hormone receptor-positive (HR+) and human epidermal growth factor receptor 2-negative (HER2-) locally advanced or metastatic breast cancer. * Confirmed PIK3CA mutation status in blood or tumor tissue using NMPA-approved or adequately validated testing methods (PCR or NGS) prior to initiating inavolisib therapy. * First-time recipient of inavolisib treatment. * The study center can provide complete electronic medical records, prescription records, and laboratory test data. Exclusion Criteria: * Concomitant history of recent severe metabolic disorders, such as diabetic ketoacidosis or hyperosmolar hyperglycemic state. * Prior participation in any clinical trial where adverse events experienced during that trial have not resolved or stabilized prior to starting inavolisib (as determined by the investigator). * Currently participating in any other clinical study or trial that prohibits concurrent participation in this study. * Any condition or reason that, in the opinion of the investigator, makes the patient unsuitable for study participation or difficult to follow up.
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Tianjin Medical University Cancer Institute and Hospital
RECRUITINGTianjin, Tianjin Municipality, China
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