Sha Li1, Meng Zhang2, Feng Xu3, Ying Wang1, Dong Leng1. 1. Department of Clinical Laboratory, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China. 2. Department of Molecular Diagnosis Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China. 3. Department of Breast Surgery, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China.
Abstract
CONTEXT: The potential relationship between exosomal microRNAs (miRNAs) and clinical symptoms in breast cancer patients and the expression levels of exosomal miRNAs in patients undergoing surgery and chemotherapy are still unclear. AIMS: The aim of this study was to explore the correlation among exosomal miRNAs and clinical features and treatment in breast cancer patients. MATERIALS AND METHODS: First, exosomes were isolated from the serum of patients with breast cancer and healthy controls. Next, the features of exosomes were identified by transmission electron microscopy, nanoparticle tracking analysis, and Western blot assays. Then, we detected the expression of the top-ranked miRNAs (miR-3662, miR-16-1, miR-146a, miR-1290, and miR-29c) in sixty breast cancer patients and twenty healthy controls using quantitative real-time polymerase chain reaction. STATISTICAL ANALYSIS USED: The differential expression was measured by the Mann-Whitney U-test. RESULTS: The relative expression of miR-3662, miR-146a, and miR-1290 in serum exosomes was significantly higher in patients than healthy controls. Moreover, significant differences were found in the lymph node metastasis and clinical stage of breast cancer as the miRNA levels changed, but their expression levels in exosomes and sera were not correlated. In addition, exosomal miR-3662, miR-146a, and miR-1290 were shown to be valuable biomarkers to monitor patient condition in the course of surgery and chemotherapy. CONCLUSIONS: Exosomal miR-3662, miR-146a, and miR-1290 may have promising predictive value and could be utilized as biomarkers for diagnosis and preventative strategy development.
CONTEXT: The potential relationship between exosomal microRNAs (miRNAs) and clinical symptoms in breast cancer patients and the expression levels of exosomal miRNAs in patients undergoing surgery and chemotherapy are still unclear. AIMS: The aim of this study was to explore the correlation among exosomal miRNAs and clinical features and treatment in breast cancer patients. MATERIALS AND METHODS: First, exosomes were isolated from the serum of patients with breast cancer and healthy controls. Next, the features of exosomes were identified by transmission electron microscopy, nanoparticle tracking analysis, and Western blot assays. Then, we detected the expression of the top-ranked miRNAs (miR-3662, miR-16-1, miR-146a, miR-1290, and miR-29c) in sixty breast cancer patients and twenty healthy controls using quantitative real-time polymerase chain reaction. STATISTICAL ANALYSIS USED: The differential expression was measured by the Mann-Whitney U-test. RESULTS: The relative expression of miR-3662, miR-146a, and miR-1290 in serum exosomes was significantly higher in patients than healthy controls. Moreover, significant differences were found in the lymph node metastasis and clinical stage of breast cancer as the miRNA levels changed, but their expression levels in exosomes and sera were not correlated. In addition, exosomal miR-3662, miR-146a, and miR-1290 were shown to be valuable biomarkers to monitor patient condition in the course of surgery and chemotherapy. CONCLUSIONS: Exosomal miR-3662, miR-146a, and miR-1290 may have promising predictive value and could be utilized as biomarkers for diagnosis and preventative strategy development.
Entities:
Keywords:
Breast cancer; chemotherapy; exosomes; microRNAs; tumor marker
Authors: Soudeh Ghafouri-Fard; Tayyebeh Khoshbakht; Bashdar Mahmud Hussen; Mohammad Taheri; Mohammad Samadian Journal: Front Mol Biosci Date: 2021-12-24
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