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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Biomed+Opt 2016 ; 21 (4): ä Nephropedia Template TP
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Label-free identification of macrophage phenotype by fluorescence lifetime imaging microscopy #MMPMID27086689
Alfonso-García A; Smith TD; Datta R; Luu TU; Gratton E; Potma EO; Liu WF
J Biomed Opt 2016[Apr]; 21 (4): ä PMID27086689show ga
Macrophages adopt a variety of phenotypes that are a reflection of the many functions they perform as part of the immune system. In particular, metabolism is a phenotypic trait that differs between classically activated, proinflammatory macrophages, and alternatively activated, prohealing macrophages. Inflammatory macrophages have a metabolism based on glycolysis while alternatively activated macrophages generally rely on oxidative phosphorylation to generate chemical energy. We employ this shift in metabolism as an endogenous marker to identify the phenotype of individual macrophages via live-cell fluorescence lifetime imaging microscopy (FLIM). We demonstrate that polarized macrophages can be readily discriminated with the aid of a phasor approach to FLIM, which provides a fast and model-free method for analyzing fluorescence lifetime images.