LINC00899 Suppresses the Progression of Triple-negative Breast Cancer Via the MiRNA-425/PTEN Axis and is a Biomarker for Neoadjuvant Chemotherapy Efficacy

Overview

Journal J Cancer

Specialty Oncology

Date 2025 Feb 24

PMID 39991583

Authors

Lianjie Niu

Yongtao Bai

Meng Yu

Xianfu Sun

Affiliations

Soon will be listed here.

Abstract

Close clinical attention has been paid to triple-negative breast cancer (TNBC) due to its poor prognosis, high recurrence and mortality rates and rapid invasion and metastasis. The present study aimed to explore the potential mechanism of LINC00899 in the progression of TNBC and its effect on the proliferation and migration of TNBC cells via the microRNA (miR)-425/phosphatase and tensin homolog (PTEN) axis. For this purpose, plasma exosomes and related clinical data from 119 patients with breast cancer receiving neoadjuvant chemotherapy (59 patients with TNBC, 32 with HER2 and with 28 luminal-type) and 20 healthy women were collected. Functional assays were then used to verify the role of the LINC00899/miR-425/PTEN axis in the proliferation and migration of TNBC cells. The results showed that the expression of LINC00899 was reduced in plasma exosomes and breast cancer cell lines, which was associated with the Ki-67 index, tumor size and the presence or absence of lymph node metastasis but was not associated with patient age, androgen receptor expression or cholangiocarcinoma thrombus. The receiver operating characteristic curve results showed that LINC00899 had a high predictive value for the pathological outcome of patients with TNBC receiving neoadjuvant treatment. The results of the functional experiments also showed that LINC00899 targeted and regulated miR-425 in TNBC, and miR-425 negatively regulated the expression of PTEN. In conclusion, the results of the present indicated that LINC00899 may predict neoadjuvant chemotherapy efficacy in patients with TNBC and that LINC00899 inhibited the proliferation and migration of MDA-MB-231 cells via the miR-425/PTEN axis.

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