Cited by 23Extracellular vesicles in diseaseMicroRNA in disease regulationMolecular Biology Techniques and Applications

Storage Stability of Blood Samples for miRNAs in Glycosylated Extracellular Vesicles

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Ma, Cuidie, Ding, Rui, Hao, Kun, Du, Wenqian, Xu, Lida, Gao, Qi, Yu, Changyuan·2023·Molecules

Abstract

Extracellular vesicle (EV) miRNAs are promising biomarkers for clinical diagnosis. However, their stability is a crucial concern affecting reliability and accuracy. Factors such as sample collection, processing, storage conditions, and experimental procedures impact EV miRNA stability. Studying EV miRNA stability aims to find optimal handling and storage methods, ensuring integrity and functionality throughout research. In this study, we used RT-qPCR and GlyExo-Capture technology, which can specifically capture glycosylated EVs by lectin, to assess the stability of glycosylated EV miRNAs. We found that slow acceleration centrifugation and two-step centrifugation methods were suitable for subsequent experiments. To ensure uniformity, we recommend using the two-step centrifugation method. We also studied blood storage before serum separation and recommend separation within 2 h at 4 °C or 25 °C. For separated serum samples, higher temperatures accelerated miRNA degradation, and the storage duration should be adjusted based on laboratory conditions. Short-term storage at -20 °C is acceptable for up to 3 months while avoiding repeated freeze-thaw cycles. We developed protective agents to extend the storage time at 25 °C, meeting clinical requirements. Additionally, Lakebio's cfRNA storage tubes effectively preserved the stability of miRNAs in plasma glycosylated EVs. Understanding EV miRNA stability provides insights into optimizing sample handling, storage strategies, and enhancing reliability in clinical applications.

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  • EVs cannot be stored for a long time since they lose their structure and bioactivity due to destruction of the lipid layers.

    “However, we cannot store the EVs for a long time since they lose their structure and bioactivity due to the destruction of the lipid layers [327–329].”

    From Extracellular vesicles as nanotheranostic platforms for targeted neurological disorder interventions (2024) · cites this paper as [328]

    The Discussion (page not provided) recommends freezing EVs at −80 °C or below for long-term storage spanning days to months, contrary to the claim that they cannot be stored for a long time. It says repeated freeze–thaw cycles may damage EV membranes, but does not present lipid-layer destruction and loss of bioactivity as inevitable consequences of storage. (LLM, conf=0.86)

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Authors
Ma, C., Ding, R., Hao, K., Du, W., Xu, L., Gao, Q., & Yu, C.
Affiliations
  • Beijing University of Chemical Technology (CN)
  • Chinese Academy of Medical Sciences & Peking Union Medical College (CN)
  • Beijing Hotgen Biotech Co., Ltd., Beijing 102600, China
Corresponding author
  • Gao, Qi
  • Yu, Changyuan
ORCID
Gao, Qi
Venue
Molecules
Publisher
MDPI AG
Published
2023-12-23
Volume
29
Issue
1
Pages
103
ISSN
1420-3049 (ISSN-L)
OpenAlex
W4390175377
Cited by
22
References
58
Citations by year
2026: 7 · 2025: 8 · 2024: 7
FWCI
1.96
Type
journal article
Language
en
Open access
Locations
  • Molecules (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Natural Science Foundation of China (82174531, XK2023-13, 2022AB022)
  • National High-Level Hospital Clinical Research Funding (82174531, XK2023-13, 2022AB022)
  • Scientific and Technological Research Project of the Xinjiang Production and Construction Corps (82174531, XK2023-13, 2022AB022)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Molecular Biology Techniques and Applications
Keywords
extracellular vesicles, miRNA stability, blood sample storage, centrifugation, serum separation, storage temperature, freeze-thaw cycles, biomarkers
MeSH terms
Acceleration, Extracellular Vesicles, Glycosylation, Reproducibility of Results, MicroRNAs

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