Size-selective filtration of extracellular vesicles with a movable-layer device

Islam Seder, Hyomin Moon, Su Jin Kang, Sehyun Shin, Won Jong Rhee, Sung Jin Kim

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This paper presents a microfluidic device that can isolate extracellular vesicles (EVs) with multiple size intervals in a simple, effective, and automated manner. We accomplish this size-selective separation using a vertically movable plunger and a rotationally movable chip. The chip has open chambers with nanoporous filters that are sequentially connected by check valves. The plunger speed is adjusted to reduce chamber pressurization in order to prevent EV deformation, thereby achieving a high separation resolution. Herein, high-purity EVs with a purity ten times higher than that of ultracentrifugation were obtained by washing three times with a high EV recovery rate of 89%. For the analysis of device performance, we used polymer nanobeads, preformed liposomes, and canine blood plasma. To demonstrate the utility of the device, we applied size-selective isolation to EVs that were secreted by endothelial cells under shear flow. The results revealed that the cells secreted more EVs of larger size, the expression of CD63 protein was higher for EVs with a larger size, and a high amount of TSG101 protein was expressed under the condition of no shear flow. This device is envisioned to facilitate molecular analysis and EV-based biomarker discovery that use various biofluids, including blood plasma, urine, and cell culture supernatants. Our device automates size-selective EV filtration that requires laborious multiple washing and separation steps.

Original languageEnglish
Pages (from-to)3699-3707
Number of pages9
JournalLab on a Chip
Issue number19
Publication statusPublished - 2022 Aug 16

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2016R1A5A1010148 and 2020R1A2B5B01002241) and by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry and Energy (MOTIE, 20174010201490).

Publisher Copyright:
© 2022 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • Bioengineering
  • Biochemistry
  • General Chemistry
  • Biomedical Engineering


Dive into the research topics of 'Size-selective filtration of extracellular vesicles with a movable-layer device'. Together they form a unique fingerprint.

Cite this