HER-2 expression

Our findings revealed that statin use significantly enhanced the efficacy of T-DXd in both a preclinical HER2-negative rat model and patients with HER2-positive mBC. Prospective clinical trials are warranted to validate these observations.

These findings support the existence of greater variability in surrogate and intrinsic molecular subtypes within secretory carcinomas, providing potential personalized therapeutic strategies for the treatment of these patients.

P1/2, N=178, Recruiting, Chia Tai Tianqing Pharmaceutical Group Nanjing Shunxin Pharmaceutical Co., Ltd. | Not yet recruiting --> Recruiting

Therefore, these findings suggest that the remarkable response of HER2-positive DCIS in this case may be attributable to the HER2-inhibitory effect of osimertinib. Further research is warranted to determine whether osimertinib could serve as a potential treatment option for HER2-positive breast cancer, including DCIS.

In the real-world setting, RC48 shows some clinical efficacy and a manageable safety profile in patients with HER2-expressing advanced gastric cancer. These findings provide useful information for clinical practice.

Multi-platform and multi-omics profiling in this large unique cohort of longitudinal TNBC samples revealed distinct patterns of expression and dynamic changes of key biomarkers of interest for targeted therapies. Given variability with manual IHC scoring, improved methods for quantification of expression may help optimize treatment selection in an individualized manner.

HER2-low early breast cancer shows lower pCR after neoadjuvant therapy but better long-term survival. These findings support the clinical relevance of HER2-low as a biologically meaningful subgroup within HER2-negative disease, while its status as a stable and independent subtype still requires further validation through prospective studies, standardized testing, and multi-omics investigation.

P2/3, N=574, Recruiting, SUNHO（China）BioPharmaceutical CO., Ltd. | N=90 --> 574 | Trial completion date: Jul 2028 --> Jul 2029 | Trial primary completion date: Jul 2026 --> Jul 2028

P1, N=108, Active, not recruiting, Daiichi Sankyo | N=78 --> 108 | Trial completion date: Jun 2026 --> May 2030 | Trial primary completion date: Jun 2026 --> May 2030

Methods We derived a novel PDX from a patient with hormone receptor negative, HER2-positive IBC refractory to neoadjuvant chemotherapy with Docetaxel, Carboplatin, Trastuzumab, and Pertuzumab (TCHP)...We performed short-tandem repeat (STR) profiling, plotted tumor growth curves for mice treated with alpelisib/everolimus vs. untreated, and immunohistochemistry (IHC), and performed clinical genomic assays...Conclusion We established a PDX of a HER2-positive IBC tumor with a PIK3CA hotspot mutation (H1047R) refractory to TCHP. Targeting the PI3K/mTOR pathway may be useful to overcome resistance in HER2-positive IBC with a H1047R mutation in PIK3CA.

Higher FLOT2 expression in nine HER2 amplified cell lines correlated with a higher T-DM1 IC50 in vitro , and breast cancer patients with high FLOT2 expression had worse survival when receiving either T-DXd (16.2 months (m) vs 18.3 m, p=0.04) or T-DM1 (38.0 m vs 41.3 m, p=0.1) in real-world Caris Life Sciences data. In conclusion, FLOT2 regulates the internalization and cytotoxicity of T-DM1 mediated by Cbl-dependent ubiquitination of HER2. Zoledronic acid disrupts the HER2/FLOT2 interaction, therefore increasing the internalization and cytotoxicity of T-DM1, providing proof of principle that a small molecule inhibitor of the HER2/FLOT2 interaction can enhance the activity of the HER2-targeting ADC.

SHAP analysis highlighted Wavelength-HHL_GLSZM_SAHGE and DLfeature_8 as key HER2 predictors. By integrating clinical, endoscopic, and radiomic data, the hierarchical multimodal approach enhances HER2 expression prediction in GC, thereby optimizing clinical decision-making, and enabling tailored HER2-targeted therapies.