Measurement of cellular fluorescence intensity

AN Atsushi Nakayama
AO Akira Otani
TI Tsubasa Inokuma
DT Daisuke Tsuji
HM Haruka Mukaiyama
AN Akira Nakayama
KI Kohji Itoh
AO Akira Otaka
KT Keiji Tanino
KN Kosuke Namba
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Digital imaging analysis was also performed by a standard imaging software attached to the confocal microscopic system in a fluorescence mode. The cells containing significant fluorescent inclusions were designated as positive cells. Three different areas showing 20–30 cells each were viewed. The relative amount of the accumulated natural substrates in microglial cell population was expressed as immunofluorescence intensity index in each image (mean value). Relative fluorescence intensity was graded, ranging from 0 to 255 in this system. The fluorescence intensity was linearly correlated with the number of pixels showing a positive signal. Relative intensities for other cell strains were calculated within the range of this gradation.

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