A method for extraction of exosomes from breast tumour cells and characterisation by transmission electron microscopy.
J Microsc
; 292(3): 117-122, 2023 12.
Article
em En
| MEDLINE
| ID: mdl-37855326
ABSTRACT
Exosomes can not only be used as markers of tumour metastasis but also be used for noninvasive diagnosis of clinical diseases, which holds significant medical research value. Observing the morphology and distribution of exosomes using transmission electron microscopy (TEM) is highly significant. In this study, we use breast tumour cell (MDA-MB-231) exosomes as a representative sample and focus on the extraction and purification of exosomes, as well as the investigation of optimal conditions for the observation of exosomes using TEM. Through comparative tests, we obtained the optimal dilution concentration and staining method for TEM of exosomes, the best dilution concentration is 100 times, the best negative staining time is 1.5 min. Western blotting and scanning electron microscopy (SEM) confirmed the presence of exosome. The particle size experiment shows that the size of exosomes is mainly distributed between 60 nm and 150 nm. This method provides a reference for TEM sample preparation of subcellular structures and small molecular biomaterials other than exosomes.
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Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
/
Exossomos
Limite:
Female
/
Humans
Idioma:
En
Revista:
J Microsc
Ano de publicação:
2023
Tipo de documento:
Article