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Miyamoto S, Hirakawa T, Noguchi Y, Urushiyama D, Miyata K, Baba T, Yotsumoto F, Yasunaga S, Nakabayashi K, Hata K, Nakagawa W, Otsuka T, Nozawa Y, Furuhata I, Mikasa J. Physical Properties of Ultrafine Bubbles Generated Using a Generator System. In Vivo 2023; 37:2555-2563. [PMID: 37905634 PMCID: PMC10621414 DOI: 10.21873/invivo.13363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 07/27/2023] [Accepted: 08/03/2023] [Indexed: 11/02/2023]
Abstract
BACKGROUND/AIM Ultrafine bubbles (UFBs) have been extensively researched owing to their promising physical and biological properties. However, determining the lifespan or ideal concentration of UFBs for various biological events is challenging. This study aimed to determine the maximum concentration and longest lifespan of UFBs and to verify the validity of UFBs for assessing cell properties. MATERIALS AND METHODS A generator system (HMB-H0150+P001, TOSSLEC Corporation Limited, Kyoto, Japan) generated UFBs using various gases. The size and concentration of UFBs in ultrapure water and cell culture medium were measured through a nanoparticle tracking analysis method. RESULTS The UFB concentration increased when the generator operated in a time dependent manner. The mean size of UFBs was approximately 120 nm. In the UFB lifespan, the concentration decreased by approximately 30% within the first two weeks of generation and was stable for up to 6 months. The UFB size increased by approximately 20% within the first two weeks of generation and demonstrated minor changes until the 6th month. The number of cells differed significantly with various concentrations of nitrogen gas UFBs. CONCLUSION The generator system can generate UFBs with multiple concentrations within a suitable temperature. Consequently, the solution containing UFBs could be widely acceptable in cell culture systems.
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Affiliation(s)
- Shingo Miyamoto
- Department of Obstetrics & Gynecology, School of Medicine, Iwate Medical University, Iwate, Japan;
| | - Toyofumi Hirakawa
- Department of Obstetrics & Gynecology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan;
| | - Yukiko Noguchi
- Department of Obstetrics & Gynecology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Daichi Urushiyama
- Department of Obstetrics & Gynecology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Kohei Miyata
- Department of Obstetrics & Gynecology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Tsukasa Baba
- Department of Obstetrics & Gynecology, School of Medicine, Iwate Medical University, Iwate, Japan
| | - Fusanori Yotsumoto
- Department of Obstetrics & Gynecology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Shin'ichiro Yasunaga
- Department of Biochemistry, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Kazuhiko Nakabayashi
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Kenichiro Hata
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
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