HER2-Low Metastatic Breast Cancer: DB-1303 vs Chemotherapy

We are studying a new treatment, DB-1303, for patients with HER2-low, hormone receptor-positive metastatic breast cancer. The goal is to see if it works better than standard chemotherapy after previous treatments have failed.

What diseases are being studied?

Health conditions and diseases that the clinical trial is designed to study and treat.

Who can participate in the clinical trial?

These questions help us understand your situation so we can let the trial team know whether you might be a potential match. This is not a medical evaluation and is not part of the official screening, the study doctor will make the final decision..

What medicines are being studied?

Medicines that are officially approved for use in the European Union and considered safe by EMA. These medicines are already on the market and may be tested for new conditions or populations.

Capecitabine
Capecitabine is a chemotherapy medicine used to treat certain cancers, including breast and colon cancer.
Paclitaxel
Paclitaxel is a chemotherapy medicine used to treat various types of cancer.

What active substances are being studied?

Active substances that are officially approved for use in the European Union and considered safe by EMA. These substances are already on the market and may be tested for new conditions or populations.

Capecitabine
Capecitabine is a substance that helps stop certain cancers from growing, commonly used for breast and colorectal cancer.
Paclitaxel
Paclitaxel is a substance used in chemotherapy to treat various cancers by preventing cancer cells from dividing.
Paclitaxel Albumin-Bound
Paclitaxel albumin-bound is a chemotherapy substance used to treat several types of cancer by preventing cancer cells from dividing.

What experimental substances are being tested?

Experimental substances that are being investigated in this clinical trial. These are not yet approved for general use.

Db-1303

What similar medicines might you know?

Don't worry if you don't know the medicines tested in the trial. There is a chance you have heard about the similar medicines. Check the list below to see if you are familiar with any of them.

Abutrax
Apexelsin
Axitaxel

Where is the clinical trial being conducted?

Locations and medical facilities where this clinical trial is currently recruiting or conducting research. Select the locations where you would like to participate.

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UZ Brussel
Medical Oncology
Ganshoren, Belgium
UZ Leuven
General Medical Oncology
Heverlee, Belgium
Universitair Ziekenhuis Gent
Medical Oncology
Ledeberg, Belgium

Sponsor: Dualitybio Inc.
Last updated: Nov 26, 2025

Disclaimer: Parts of this content have been automatically extracted from the EU Clinical Trials registry. While we strive for accuracy, please always contact the trial site or sponsor directly for correct and official information before making any decisions about participation. View on EU Clinical Trials.