Wang Z, Millet L, Chan V, Ding H, Gillette MU, Bashir R, Popescu G. Label-free intracellular transport measured by spatial light interference microscopy.
J Biomed Opt 2011;
16:026019. [PMID:
21361703 PMCID:
PMC3071305 DOI:
10.1117/1.3549204]
[Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2010] [Revised: 12/30/2010] [Accepted: 01/03/2011] [Indexed: 05/22/2023]
Abstract
We show that applying the Laplace operator to a speckle-free quantitative phase image reveals an unprecedented level of detail in cell structure, without the gradient artifacts associated with differential interference contrast microscopy, or photobleaching and phototoxicity limitations common in fluorescence microscopy. This method, referred to as Laplace phase microscopy, is an efficient tool for tracking vesicles and organelles in living cells. The principle is demonstrated by tracking organelles in cardiomyocytes and vesicles in neurites of hippocampal neurons, which to our knowledge are the first label-free diffusion measurements of the organelles in such cells.
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