Details

Autor(en) / Beteiligte

• Hayashi, Tomoya
• Oguma, Kumiko
• Fujimura, Yoshihiro
• Furuta, Rika A
• Tanaka, Mitsunobu
• Masaki, Mikako
• Shinbata, Yasuhito
• Kimura, Takafumi
• Tani, Yoshihiko
• Hirayama, Fumiya
• Takihara, Yoshihiro
• Takahashi, Koki
• Hamblin, Michael R.

Titel

UV light-emitting diode (UV-LED) at 265 nm as a potential light source for disinfecting human platelet concentrates

Ist Teil von

• PloS one, 2021-05, Vol.16 (5), p.e0251650-e0251650

Ort / Verlag

United States: Public Library of Science

Erscheinungsjahr

2021

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• The risk of sepsis through bacterial transmission is one of the most serious problems in platelet transfusion. In processing platelet concentrates (PCs), several methods have been put into practice to minimize the risk of bacterial transmission, such as stringent monitoring by cultivation assays and inactivation treatment by photoirradiation with or without chemical agents. As another potential option, we applied a light-emitting diode (LED) with a peak emission wavelength of 265 nm, which has been shown to be effective for water, to disinfect PCs. In a bench-scale UV-LED exposure setup, a 10-min irradiation, corresponding to an average fluence of 9.2 mJ/cm2, resulted in >2.0 log, 1.0 log, and 0.6 log inactivation (mean, n = 6) of Escherichia coli, Staphylococcus aureus, and Bacillus cereus, respectively, in non-diluted plasma PCs. After a 30-min exposure, platelet counts decreased slightly (18 ± 7%: mean ± SD, n = 7); however, platelet surface expressions of CD42b, CD61, CD62P, and PAC-1 binding did not change significantly (P>0.005), and agonist-induced aggregation and adhesion/aggregation under flow conditions were well maintained. Our findings indicated that the 265 nm UV-LED has high potential as a novel disinfection method to ensure the microbial safety of platelet transfusion.