What question did this study set out to answer?

This research aims to investigate how the PD-1 regulatory network contributes to lapatinib resistance in HER2+ breast cancer.

February 11, 2026Open Access

Tumor-Intrinsic PD-1 Regulatory Network Drives Lapatinib Resistance in HER2⁺ Breast Cancer: An Integrative Bioinformatics Analysis

Key Points

This research aims to investigate how the PD-1 regulatory network contributes to lapatinib resistance in HER2+ breast cancer.
Conducted an integrative bioinformatics analysis of genetic and signaling data.
Identified key pathways involved in lapatinib resistance.
Examined the role of PD-1 in T cell function and immune response.
Demonstrated that PD-1 regulation is linked to lapatinib resistance in HER2+/ER-/PR- breast cancer.
Found that interferon signaling was silenced in resistant tumor cells.
Revealed an immunosuppressive environment fostering T cell exhaustion.

Abstract

The findings revealed that the PLR regulatory network is associated with HER2⁺/ER-/PR- lapatinib resistance through multiple mechanisms, including interferon signaling silencing, T cell exhaustion, and the fostering of an immunosuppressive niche. These insights pave the way for interventions aimed at overcoming lapatinib resistance in HER2⁺ breast cancer.

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Cite This Study

Alhallaq et al. (Sun,) studied this question.

synapsesocial.com/papers/698c1bb8267fb587c655d92d https://doi.org/https://doi.org/10.31557/apjcp.2026.27.2.613

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