Title |
Triple Targeting of HER Receptors Overcomes Heregulin-mediated Resistance to EGFR Blockade in Colorectal Cancer.
|
---|---|
Published in |
Molecular Cancer Therapeutics, February 2022
|
DOI | 10.1158/1535-7163.mct-21-0818 |
Pubmed ID | |
Authors |
Alexander Rau, Nicole Janssen, Lennart Kühl, Thomas Sell, Svetlana Kalmykova, Thomas E Mürdter, Marc-H Dahlke, Christine Sers, Markus Morkel, Matthias Schwab, Roland E Kontermann, Monilola A Olayioye |
Abstract |
Current treatment options for patients with advanced colorectal cancers (CRC) include anti-EGFR/HER1 therapy with the blocking antibody cetuximab. Although a subset of patients with KRAS wild-type disease initially respond to the treatment, resistance develops in almost all cases. Relapse has been associated with the production of the ligand heregulin (HRG) and/or compensatory signaling involving the receptor tyrosine kinases HER2 and HER3. Here we provide evidence that triple HER receptor blockade based on a newly developed bispecific EGFRxHER3-targeting antibody (scDb-Fc) together with the HER2 blocking antibody trastuzumab effectively inhibited HRG-induced HER receptor phosphorylation, downstream signaling, proliferation and stem cell expansion of DiFi and LIM1215 CRC cells. Comparative analyses revealed that the biological activity of scDb-Fc plus trastuzumab was sometimes even superior to that of the combination of the parental antibodies, with PI3K/Akt pathway inhibition correlating with improved therapeutic response and apoptosis induction as seen by single cell analysis. Importantly, growth suppression by triple HER targeting was recapitulated in primary KRAS wild-type patient-derived organoid (PDO) cultures exposed to HRG. Collectively, our results provide strong support for a pan-HER receptor blocking approach to combat anti-EGFR therapy resistance of KRAS wild-type CRC tumors mediated by the upregulation of HRG and/or HER2/HER3 signaling. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Germany | 1 | 25% |
Unknown | 3 | 75% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 3 | 75% |
Science communicators (journalists, bloggers, editors) | 1 | 25% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 17 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 3 | 18% |
Lecturer | 2 | 12% |
Student > Ph. D. Student | 2 | 12% |
Student > Master | 1 | 6% |
Professor | 1 | 6% |
Other | 0 | 0% |
Unknown | 8 | 47% |
Readers by discipline | Count | As % |
---|---|---|
Biochemistry, Genetics and Molecular Biology | 6 | 35% |
Nursing and Health Professions | 1 | 6% |
Immunology and Microbiology | 1 | 6% |
Unknown | 9 | 53% |