title: Vibrational Imaging of Glucose Uptake Activity in Live Cells and Tissues by Stimulated Raman Scattering.
abstract: Glucose is a ubiquitous energy source for most living organisms. Its uptake activity closely reflects cellular metabolic demand in various physiopathological conditions. Extensive efforts have been made to specifically image glucose uptake, such as with positron emission tomography, magnetic resonance imaging, and fluorescence microscopy, but all have limitations. A new platform to visualize glucose uptake activity in live cells and tissues is presented that involves performing stimulated Raman scattering on a novel glucose analogue labeled with a small alkyne moiety. Cancer cells with differing metabolic activities can be distinguished. Heterogeneous uptake patterns are observed with clear cell-cell variations in tumor xenograft tissues, neuronal culture, and mouse brain tissues. By offering the distinct advantage of optical resolution but without the undesirable influence of fluorophores, this method will facilitate the study of energy demands of living systems with subcellular resolution.
authors.affiliation: Department of Chemistry, Columbia University, New York, NY 10027 (USA).
authors.forename: Fanghao
authors.initials: F
authors.lastname: Hu
authors.affiliation: Department of Chemistry, Columbia University, New York, NY 10027 (USA).
authors.forename: Zhixing
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Department of Chemistry, Columbia University, New York, NY 10027 (USA).
authors.forename: Luyuan
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Columbia University, New York, NY 10027 (USA).
authors.forename: Yihui
authors.initials: Y
authors.lastname: Shen
authors.affiliation: Department of Chemistry, Columbia University, New York, NY 10027 (USA).
authors.forename: Lu
authors.initials: L
authors.lastname: Wei
authors.affiliation: Department of Chemistry, Columbia University, New York, NY 10027 (USA). wm2256@columbia.edu.|Kavli Institute for Brain Science, Columbia University, New York, NY 10027 (USA). wm2256@columbia.edu.
authors.forename: Wei
authors.initials: W
authors.lastname: Min
mesh_terms: D000818:Animals; D002470:Cell Survival; D005947:Glucose / Q000031:analogs & derivatives / Q000378:metabolism* / Q000493:pharmacokinetics*; D006367:HeLa Cells; D006801:Humans; D051379:Mice; D009374:Neoplasms, Experimental / Q000378:metabolism* / Q000473:pathology*; D013059:Spectrum Analysis, Raman; D014018:Tissue Distribution; D014732:Vibration
chemical_list: D005947:Glucose
keywords: Raman spectroscopy; SRS microscopy; alkyne tags; glucose uptake; imaging agents