Abstract

Optical diffraction tomography (ODT) enables imaging of unlabeled intracellular components by measuring the three-dimensional (3D) refractive index (RI). We aimed to detect intracellular monosodium urate (MSU) crystals in synovial leukocytes derived from gout patients using ODT. The 3D RI values of the synthetic MSU crystals, measured by ODT, ranged between 1.383 and 1.440. After adding synthetic MSU crystals to a macrophage, RI tomograms were reconstructed using ODT, and the reconstructed RI tomograms discerned intracellular and extracellular MSU crystals. We observed unlabeled synthetic MSU crystal entry into the cytoplasm of a macrophage through time-lapse imaging. Furthermore, using gout patient-derived synovial leukocytes, we successfully obtained RI tomogram images of intracellular MSU crystals. The 3D RI identification of MSU crystals was verified with birefringence through polarization-sensitive ODT measurements. Together, our results provide evidence that this novel ODT can identify birefringent MSU crystals in synovial leukocytes of patients with gout.

Details

Title
Detection of intracellular monosodium urate crystals in gout synovial fluid using optical diffraction tomography
Author
Park, Sangwoo 1 ; Lee, Lucy Eunju 2 ; Kim, Hanna 2 ; Kim, Ji Eun 2 ; Lee Seung Jun 3 ; Yoon Sunggyu 4 ; Shin Seungwoo 5 ; Kang Heemin 6 ; Park YongKeun 7 ; Song Jason Jungsik 8 ; Lee, Seongsoo 4 

 Korea Basic Science Institute (KBSI), Division of Aging Research, Gwangju Center, Gwangju, South Korea (GRID:grid.410885.0) (ISNI:0000 0000 9149 5707); Korea University, Department of Materials Science and Engineering, Seoul, South Korea (GRID:grid.222754.4) (ISNI:0000 0001 0840 2678) 
 Yonsei University College of Medicine, Division of Rheumatology, Department of Internal Medicine, Seoul, South Korea (GRID:grid.15444.30) (ISNI:0000 0004 0470 5454) 
 Yonsei University College of Medicine, Division of Rheumatology, Department of Internal Medicine, Seoul, South Korea (GRID:grid.15444.30) (ISNI:0000 0004 0470 5454); Yonsei University College of Medicine, Synapse Center, Seoul, South Korea (GRID:grid.15444.30) (ISNI:0000 0004 0470 5454) 
 Korea Basic Science Institute (KBSI), Division of Aging Research, Gwangju Center, Gwangju, South Korea (GRID:grid.410885.0) (ISNI:0000 0000 9149 5707) 
 Korea Advanced Institute of Science and Technology (KAIST), Department of Physics, Daejeon, South Korea (GRID:grid.37172.30) (ISNI:0000 0001 2292 0500) 
 Korea University, Department of Materials Science and Engineering, Seoul, South Korea (GRID:grid.222754.4) (ISNI:0000 0001 0840 2678) 
 Korea Advanced Institute of Science and Technology (KAIST), Department of Physics, Daejeon, South Korea (GRID:grid.37172.30) (ISNI:0000 0001 2292 0500); KAIST Institute for Health Science and Technology, KAIST, Daejeon, South Korea (GRID:grid.37172.30) (ISNI:0000 0001 2292 0500); Tomocube Inc., Daejeon, South Korea (GRID:grid.37172.30) 
 Yonsei University College of Medicine, Division of Rheumatology, Department of Internal Medicine, Seoul, South Korea (GRID:grid.15444.30) (ISNI:0000 0004 0470 5454); Yonsei University College of Medicine, Institute for Immunology and Immunological Diseases, Seoul, South Korea (GRID:grid.15444.30) (ISNI:0000 0004 0470 5454) 
Publication year
2021
Publication date
2021
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2525226945
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.