University of Oulu

Zhu, R.; Avsievich, T.; Bykov, A.; Popov, A.; Meglinski, I. Influence of Pulsed He–Ne Laser Irradiation on the Red Blood Cell Interaction Studied by Optical Tweezers. Micromachines 2019, 10, 853

Influence of pulsed He–Ne laser irradiation on the red blood cell interaction studied by optical tweezers

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Author: Zhu, Ruixue1; Avsievich, Tatiana1; Bykov, Alexander1;
Organizations: 1Optoelectronics and Measurement Techniques Laboratory, University of Oulu, 90570 Oulu, Finland
2Interdisciplinary Laboratory of Biophotonics, National Research Tomsk State University, 634050 Tomsk, Russia
3Institute of Engineering Physics for Biomedicine (PhysBio), National Research Nuclear University (MEPhI), 115409 Moscow, Russia
4Aston Institute of Materials Research, School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, UK
5School of Life and Health Sciences, Aston University, Birmingham B4 7ET, UK
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.1 MB)
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Language: English
Published: Multidisciplinary Digital Publishing Institute, 2019
Publish Date: 2020-01-08


Optical Tweezers (OT), as a revolutionary innovation in laser physics, has been extremely useful in studying cell interaction dynamics at a single-cell level. The reversible aggregation process of red blood cells (RBCs) has an important influence on blood rheological properties, but the underlying mechanism has not been fully understood. The regulating effects of low-level laser irradiation on blood rheological properties have been reported. However, the influence of pulsed laser irradiation, and the origin of laser irradiation effects on the interaction between RBCs remain unclear. In this study, RBC interaction was assessed in detail with OT. The effects of both continuous and pulsed low-level He–Ne laser irradiation on RBC aggregation was investigated within a short irradiation period (up to 300 s). The results indicate stronger intercellular interaction between RBCs in the enforced disaggregation process, and both the cell contact time and the initial contact area between two RBCs showed an impact on the measured disaggregation force. Meanwhile, the RBC aggregation force that was independent to measurement conditions decreased after a short time of pulsed He–Ne laser irradiation. These results provide new insights into the understanding of the RBC interaction mechanism and laser irradiation effects on blood properties.

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Series: Micromachines
ISSN: 2072-666X
ISSN-E: 2072-666X
ISSN-L: 2072-666X
Volume: 10
Issue: 12
Article number: 853
DOI: 10.3390/mi10120853
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
1182 Biochemistry, cell and molecular biology
222 Other engineering and technologies
Funding: This research was partially supported by China Scholarship Council (CSC No. 201706410089, R.Z.), Tauno Tönning Foundation (grant No. 20190104, R.Z.), EDUFI Fellowship (TM-17-10370, TM-18-10820, T.A.), Suomen Kulttuurirahasto (grant No. 00190188, T.A.), Oulun yliopiston apuraharahasto (No. 20180107, T.A.). I.M. also acknowledges partial support from the Academy of Finland (project 326204, 325097), MEPhI Academic Excellence Project (Contract No. 02.a03.21.0005), and the National Research Tomsk State University Academic D.I. Mendeleev Fund Program.
Academy of Finland Grant Number: 326204
Detailed Information: 326204 (Academy of Finland Funding decision)
325097 (Academy of Finland Funding decision)
Copyright information: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (