PIK3CA mutations are associated with pathologic complete response rate to neoadjuvant pyrotinib and trastuzumab plus chemotherapy for HER2-positive breast cancer

© 2022. The Author(s)..

BACKGROUND: Neoadjuvant treatment with a dual anti-human epidermal growth factor receptor 2 (HER2) blockade with pyrotinib and trastuzumab has been shown to be effective for HER2-positive breast cancer.

METHODS: The genomic characteristics of 425 cancer-related genes from the archived tumour blocks of 50 patients enrolled in a prospective neoadjuvant pyrotinib and trastuzumab plus chemotherapy clinical trial (ChiCTR1900022293) were assessed by next-generation sequencing (NGS). The relationship between tumour biomarkers and the postoperative pathological complete response (pCR) were explored.

RESULTS: Forty-five patients completed neoadjuvant chemotherapy and final surgery, of which 26 (58%) achieved a pCR. Among all driver gene mutations, PIK3CA mutation was screened out for having a significant relationship with the treatment response. The pCR rate of patients with wild-type PIK3CA was significantly higher than patients with mutated PIK3CA (80.8% vs. 26.3%; P = 0.00057), and remained significant after a multiple comparison adjustment (Padjusted = 0.024). We further evaluated the predictive value with logistic regression model of clinical features, genetic biomarkers or both, an AUC of 0.912 (95% CI: 0.827-0.997) was achieved in the integrated model.

CONCLUSIONS: Our data suggest that HER2-positive breast cancers with activating mutations in PIK3CA are less likely to benefit from pyrotinib combined with trastuzumab neoadjuvant therapy.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:128

Enthalten in:

British journal of cancer - 128(2023), 1 vom: 02. Jan., Seite 121-129

Sprache:

Englisch

Beteiligte Personen:

Shi, Qiyun [VerfasserIn]
Xuhong, Juncheng [VerfasserIn]
Luo, Tao [VerfasserIn]
Ge, Jia [VerfasserIn]
Liu, Feng [VerfasserIn]
Lan, Yang [VerfasserIn]
Chen, Qingqiu [VerfasserIn]
Tang, Peng [VerfasserIn]
Fan, Linjun [VerfasserIn]
Chen, Li [VerfasserIn]
Liang, Yan [VerfasserIn]
Wang, Minghao [VerfasserIn]
Hu, Ying [VerfasserIn]
Zhang, Yi [VerfasserIn]
Bian, Xiuwu [VerfasserIn]
Qi, Xiaowei [VerfasserIn]
Jiang, Jun [VerfasserIn]

Links:

Volltext

Themen:

Antibodies, Monoclonal, Humanized
Class I Phosphatidylinositol 3-Kinases
EC 2.7.1.137
EC 2.7.10.1
Journal Article
P188ANX8CK
PIK3CA protein, human
Pyrotinib
Receptor, ErbB-2
Research Support, Non-U.S. Gov't
Trastuzumab

Anmerkungen:

Date Completed 09.01.2023

Date Revised 09.02.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1038/s41416-022-02021-z

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM348378491