title: Enhancement of biophoton emission of prostate cancer cells by Ag nanoparticles.
abstract: Ultraweak intrinsic bioluminescence of cancer cell is a noninvasive method of assessing bioenergetic status of the investigated cells. This weak biophoton emission generated by prostate cancer cells (PC3) was measured in the presence of Ag nanoparticles and its correlation with singlet oxygen production was investigated. The comparison between nanoparticles concentration, bioluminescence intensity, and cell survival showed that Ag nanoparticles do not significantly affect cell survival at used concentration but they increase cell bioluminescent processes. It was also confirmed that singlet oxygen contributes to biophoton emission, that Ag nanoparticles increase this contribution, and that there are secondary mechanisms independent of singlet oxygen by which Ag nanoparticles contribute to increased cellular bioluminescence, possibly through plasmon resonance enhancement of intrinsic fluorescence.
authors.affiliation: Department of Physics, University of Texas at Arlington, 502 Yates St, Arlington, TX 76019 USA.
authors.forename: Marius
authors.initials: M
authors.lastname: Hossu
authors.affiliation: Department of Physics, University of Texas at Arlington, 502 Yates St, Arlington, TX 76019 USA.
authors.forename: Lun
authors.initials: L
authors.lastname: Ma
authors.affiliation: Department of Physics, University of Texas at Arlington, 502 Yates St, Arlington, TX 76019 USA.
authors.forename: Xiaoju
authors.initials: X
authors.lastname: Zou
authors.affiliation: Department of Physics, University of Texas at Arlington, 502 Yates St, Arlington, TX 76019 USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
keywords: Bioluminescence; Biophoton; Cancer; PC3; Plasmon resonance; Silver nanoparticle; Singlet oxygen