Hasebe A, Ishikawa I, Shamsul HM, Ohtani M, Segawa T, Saeki A, Tanizume N, Oouchi M, Okagami Y, Okano T, Shibata KI. Mycoplasma removal from cell culture using antimicrobial photodynamic therapy.
Photomed Laser Surg 2013;
31:125-31. [PMID:
23402393 DOI:
10.1089/pho.2012.3372]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE
The objective of this research was to determine the effectiveness of antimicrobial photodynamic therapy (aPDT) in the removal of mycoplasmas from contaminated cells.
BACKGROUND DATA
Mycoplasmas often contaminate cell cultures. The cell-contaminating mycoplasmas are removed by antibiotics, but the use of antibiotics usually induces antibiotic-resistant bacteria. aPDT is expected to be a possible alternative to antibiotic treatments for suppressing infections.
MATERIALS AND METHODS
Mycoplasma salivarium (Ms)-infected human embryonic kidney (HEK) 293 cells were irradiated using a red light-emitting diode (LED) in the presence of methylene blue (MB) as a photosensitizer. The Ms viable count was determined using culture on agar plates or using a mycoplasma detection kit.
RESULTS
aPDT performed using red LED irradiation was effective in decreasing live Ms in the presence of MB without damaging the HEK293 cells. aPDT removed live Ms from the infected cells after washing the cells with sterilized phosphate-buffered saline (PBS) to decrease the initial number of live Ms before aPDT.
CONCLUSIONS
This study suggests that aPDT could remove mycoplasmas from contaminated cells.
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