Lee, Ji Hye Kim, Jeong Ah Kwon, Min Hee Kang, Ji Yoon Rhee, Won Jong 2024-01-20T07:01:31Z 2024-01-20T07:01:31Z 2021-09-05 2015-06 0142-9612 https://pubs.kist.re.kr/handle/201004/125378 In situ single step detection of microRNAs (miRNA) in a whole exosome has been developed as a novel diagnosis method that can be utilized for various diseases. Exosomes are small extracellular vesicles that contain biomarker miRNAs produced from their originating cells and are known to travel through the circulatory system. This makes exosomal miRNAs from the body fluids an attractive biomarker that can lead to a paradigm shift in the diagnosis of disease. However, current techniques, including real-time PCR analysis, are time-consuming and laborious, making them unsuitable for exosomal miRNA detection for diagnosis. Thus, the development of alternative methods is necessary. Herein, we have demonstrated that exosomal miRNAs can be detected directly using a nano-sized fluorescent oligonucleotide probe, molecular beacon. MiRNA-21 in exosomes from breast cancer cells were detected successfully by molecular beacons in a quantitative manner. Permeabilization by streptolysin 0 treatment further enhanced the delivery of molecular beacons into exosomes, giving significantly increased signals from target miRNAs. In addition, we selectively detected cancer cell-derived exosomal miRNA-21 among heterogeneous exosome mixtures and in human serum. The method developed in the article is simple, fast, and sensitive, so it will offer great opportunities for the high-throughput diagnosis and prognosis of diseases. (C) 2015 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD MESSENGER-RNA LIVING CELLS MICROVESICLES QUANTIFICATION INHIBITION BIOMARKERS DELIVERY TARGETS MIRNAS SERUM In situ single step detection of exosome microRNA using molecular beacon Article 10.1016/j.biomaterials.2015.03.014 1 BIOMATERIALS, v.54, pp.116 - 125 BIOMATERIALS 54 116 125 scie scopus 000354591200012 2-s2.0-84928045368 Engineering, Biomedical Materials Science, Biomaterials Engineering Materials Science Article MESSENGER-RNA LIVING CELLS MICROVESICLES QUANTIFICATION INHIBITION BIOMARKERS DELIVERY TARGETS MIRNAS SERUM Exosome Molecular beacon microRNA Cancer Diagnosis