On April 29, 2025 Bicycle Therapeutics plc (NASDAQ: BCYC), a biopharmaceutical company pioneering a new and differentiated class of therapeutics based on its proprietary bicyclic peptide (Bicycle) technology, reported the presentation of additional human imaging data that validate the potential of MT1-MMP, a tumor antigen overexpressed in many cancers, as a novel target for cancer treatment and demonstrate the positive properties of Bicycle Radioconjugates (BRC) for radiopharmaceutical imaging (Press release, Bicycle Therapeutics, APR 29, 2025, View Source [SID1234652303]). The data will be presented today during a poster session at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting 2025 in Chicago.
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"The additional imaging data using an early BRC molecule continue to validate the potential of MT1-MMP as a novel cancer target, demonstrate the translatability of our preclinical data and position our technology for use as potential radiopharmaceutical therapies," said Michael Skynner, Ph.D., chief technology officer of Bicycle Therapeutics. "The new imaging data from the second patient with breast and bladder cancer presented today build on what was previously demonstrated in the first patient with advanced lung cancer, and we are encouraged that these data represent what we have seen so far in 12 patients with various solid tumors. We continue to advance our radiopharmaceuticals pipeline and look forward to sharing additional updates in the future, including initial human imaging data for our second target EphA2 later this year and the start of our first company-sponsored clinical radiopharmaceutical trials next year."
AACR 2025 Data Highlights
The German Cancer Consortium (DKTK), part of a cooperative network with the German Cancer Research Center (DKFZ), will present human imaging data conducted with an early BRC molecule targeting MT1-MMP. Imaging was performed in a 65-year-old male diagnosed with advanced pulmonary adenocarcinoma, the most common type of non-small cell lung cancer, and an 84-year-old female diagnosed with invasive ductal breast cancer and high-grade urothelial (bladder) cancer.
The 65-year-old male patient with advanced pulmonary adenocarcinoma underwent fluorine-18-labelled FDG-PET/CT imaging and two weeks later underwent MT1-MMP-PET/CT imaging up to one hour post injection of the gallium-68-labelled BRC tracer. As presented at a previous medical meeting, the MT1-MMP-PET scan demonstrated BRC tracer uptake in the primary tumor in the lung and in the lymph nodes and bones where the cancer had spread, corroborating the findings of the FDG-PET scan. While MT1-MMP-PET imaging demonstrated lower BRC tracer uptake in the primary tumor compared to FDG-PET imaging [maximum standardized uptake value (SUVmax) 6.0 g/mL vs. 10.3 g/mL], MT1-MMP-PET BRC tracer uptake was comparable in lymph node metastases (SUVmax 4.7 g/mL vs. 4.4 g/mL) and higher in bone metastases (SUVmax 7.9 g/mL vs. 6.0 g/mL).
The 84-year-old female patient with invasive ductal breast cancer and high-grade urothelial cancer underwent contrast-enhanced CT imaging and later underwent MT1-MMP-PET/CT imaging up to one hour post injection of the gallium-68-labelled BRC tracer. The MT1-MMP-PET scan revealed higher BRC tracer uptake in the primary tumors in the breast (SUVmax 4.5 g/mL) and the bladder (SUVmax 6.6 g/mL) compared to contrast-enhanced CT imaging. The MT1-MMP-PET scan also showed the cancer spread to the lymph nodes, lower spine (sacral bone) and skull, and detected a mass in the adrenal gland above the left kidney. Surgery confirmed the patient had bladder cancer that spread to the lymph nodes, and immunohistochemistry (IHC) testing confirmed MT1-MMP expression in the tumor cells.
These data are representative of the results seen in 12 out of 14 patients with various cancers, including those affecting the lung, head and neck, and bladder, who have undergone MT1-MMP-PET imaging to date. Imaging was unsuccessful or inconclusive in two patients. Overall, the results demonstrate the rapid distribution of the BRC tracer throughout the body, high uptake of the BRC tracer in the primary tumor(s) and/or in metastases where the cancer spread in the body, and elimination through the kidneys. Scans showing retention in the kidneys were in line with expectations given the imaging was conducted using a pathfinder non-optimized BRC imaging agent. Additional and more detailed analyses of the data and confirmation of MT1-MMP expression in the tumors via IHC are ongoing.
The poster presentation, "Development and clinical translation of phage display derived MT1-MMP-specific bicyclic peptide for radiotheranostic applications," is available in the Publications section of the Bicycle Therapeutics website.