Isolation and Purification of Bacterial Extracellular Vesicles from Human Feces Using Density Gradient Centrifugation

Yicong Xue; Xixin Huang; Zihao Ou; Yuanyuan Wu; Qianbei Li; Xinyue Huang; Minghui Wen; Yan Yang; Bo Situ; Lei Zheng

doi:10.3791/65574

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Isolation and Purification of Bacterial Extracellular Vesicles from Human Feces Using Density Gradient Centrifugation

密度勾配遠心分離法を用いたヒト糞便からの細菌細胞外小胞の単離と精製(英語)

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September 1, 2023

DOI: 10.3791/65574-v

Yicong Xue*¹, Xixin Huang*¹, Zihao Ou*¹, Yuanyuan Wu¹, Qianbei Li¹, Xinyue Huang¹, Minghui Wen¹, Yan Yang¹, Bo Situ¹, Lei Zheng¹

¹Department of Laboratory Medicine, Nanfang Hospital,Southern Medical University

Please note that some of the translations on this page are AI generated. Click here for the English version.

Overview

This study presents a protocol for isolating and purifying bacterial extracellular vesicles (BEVs) from human feces using density gradient centrifugation (DGC). The method reduces centrifugation time significantly and enhances BEV separation from contaminants, providing a standard approach for future research on BEVs.

Key Study Components

Research Area

Bacterial extracellular vesicles
Disease diagnostics and therapeutics
Clinical and scientific applications

Background

BEVs play a critical role in intercellular communication and disease
Traditional methods for BEV isolation can be time-consuming and inefficient
There is a need for standardized protocols in BEV research

Methods Used

Density gradient centrifugation
Human fecal samples as a biological system
Ultracentrifugation technology

Main Results

Successfully isolated and purified BEVs with reduced centrifugation time
Enhanced separation of BEVs from contaminants like lipoproteins
Demonstrated applicability of the method to other biological fluids

Conclusions

The study establishes a reliable method for BEV isolation
Enhances understanding of BEV heterogeneity in human biology

Frequently Asked Questions

What are bacterial extracellular vesicles?

Bacterial extracellular vesicles are membrane-bound particles released by bacteria that can influence various biological processes.

How does density gradient centrifugation work for isolating BEVs?

It uses layers of different densities to separate vesicles based on their size and density during centrifugation.

Can this method be applied to other biological fluids?

Yes, with appropriate modifications, this method can be adapted for use with other body fluids.

What makes this method reliable?

The reduced centrifugation time and improved separation techniques contribute to its reliability.

What potential applications are there for this research?

It may aid in diagnostics, therapeutics, and understanding bacterial behavior and interactions in human health.

How do BEVs contribute to our understanding of cell biology?

BEVs carry molecular signals that play a role in cell communication, thus providing insights into bacterial roles in health and disease.

本研究では、密度勾配遠心分離(DGC) により ヒトの糞便から濃縮した細菌の細胞外小胞(BEV)を単離・精製する方法を説明し、形態、粒子径、濃度からBEVの物理的特性を特定し、臨床研究および科学研究におけるDGCアプローチの潜在的な応用について議論します。

私たちの研究では、密度勾配遠心分離を使用して、物理学者から細菌の細胞外小胞を分離、精製、および特性評価します。私たちは、BEVと汚染物質の分離に取り組み、研究者に信頼できる方法を提供することを目指しています。当社のプロトコルにより、遠心分離時間が18時間から7時間に短縮されます。

トップダウンモードは、BEVの分離を改善し、肝臓タンパク質からの汚染を低減します。私たちの方法は、BEVの分離を簡素化し、将来の研究の基準を設定します。これは、適切な修正を行うことで他の体液にも適用でき、人体に固有の不均一性を明らかにするBEVの理解を深め、研究を促進します。

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