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2017 ; 7
(1
): 4165
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Optical coherence microscopy as a novel, non-invasive method for the 4D live
imaging of early mammalian embryos
#MMPMID28646146
Karnowski K
; Ajduk A
; Wieloch B
; Tamborski S
; Krawiec K
; Wojtkowski M
; Szkulmowski M
Sci Rep
2017[Jun]; 7
(1
): 4165
PMID28646146
show ga
Imaging of living cells based on traditional fluorescence and confocal laser
scanning microscopy has delivered an enormous amount of information critical for
understanding biological processes in single cells. However, the requirement for
a high numerical aperture and fluorescent markers still limits researchers'
ability to visualize the cellular architecture without causing short- and
long-term photodamage. Optical coherence microscopy (OCM) is a promising
alternative that circumvents the technical limitations of fluorescence imaging
techniques and provides unique access to fundamental aspects of early embryonic
development, without the requirement for sample pre-processing or labeling. In
the present paper, we utilized the internal motion of cytoplasm, as well as
custom scanning and signal processing protocols, to effectively reduce the
speckle noise typical for standard OCM and enable high-resolution intracellular
time-lapse imaging. To test our imaging system we used mouse and pig oocytes and
embryos and visualized them through fertilization and the first embryonic
division, as well as at selected stages of oogenesis and preimplantation
development. Because all morphological and morphokinetic properties recorded by
OCM are believed to be biomarkers of oocyte/embryo quality, OCM may represent a
new chapter in imaging-based preimplantation embryo diagnostics.