Comparison of Jersey Milk Derived Exosomes Extracted by Differential Ultracentrifugation Method and Kit Extraction Method

  • FAN Shijie ,
  • MA Lu ,
  • BU Dengpan
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  • 1. State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. Chinese Academy of Agricultural Sciences and World Agroforestry Center Joint Lab on Agroforestry and Sustainable Animal Husbandry, Beijing 100193, China

Received date: 2020-03-24

  Online published: 2020-11-16

Abstract

The aim of this study was to explore the advantages and disadvantages between two different methods used for extracting exosomes from Jersey milk. Exosomes was firstly extracted by differential ultracentrifugation method and kit extraction method, and then the exosomes was compared and identified by transmission electron microscopy (TEM), Bradford protein quantitative, western blot (WB) and nanoparticle tracking analysis (NTA) methods, and the cytotoxicity test was performed for exosomes extracted by kit extraction method. The results showed that the two extract methods obtained the typical saucer-like structure vesicles, but under the TEM field of vision, the exosomes extracted by kit extraction method were more than those extracted by differential ultracentrifugationmethod. The concentration of exosomes protein extracted by kit extraction method was significantly higher than that extracted by differential ultracentrifugation method (P<0.05). The exosomes marker protein apoptosis-linked gene-2 interacting protein X (ALIX) and transmembrane protein (CD81) were detected by two extract methods; the protein abundance of CD81 extracted by differential ultracentrifugation method was particularly low, and the tumor susceptibility gene 101 protein (TSG101) was not identified, but the TSG101 was identified by kit extraction method. The particle size distribution of exosomes obtained from the two extract methods was consistent with the normal size of exosomes (30 to 150 nm). Further cytotoxicity test proved that the exosomes extracted by kit extraction method had no disadvantage on the proliferation of cell. In conclusions, kit extraction method is a suitable strategy for exosomes extracted from Jersey milk based on this experimental condition.

Cite this article

FAN Shijie , MA Lu , BU Dengpan . Comparison of Jersey Milk Derived Exosomes Extracted by Differential Ultracentrifugation Method and Kit Extraction Method[J]. Chinese Journal of Animal Nutrition, 2020 , 32(11) : 5441 -5447 . DOI: 10.3969/j.issn.1006-267x.2020.11.051

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