In vivo label-free two-photon excitation autofluorescence microscopy of microvasculature using a 520 nm femtosecond fiber laser

2020 ◽  
Vol 45 (10) ◽  
pp. 2704
Author(s):  
Ting Wu ◽  
Jiuling Liao ◽  
Jia Yu ◽  
Yufeng Gao ◽  
Hui Li ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Label Free ◽  
Two Photon ◽  
Photon Excitation ◽  
Femtosecond Fiber Laser ◽  
Two Photon Excitation

scholarly journals Label-free concurrent 5-modal microscopy (Co5M) resolves unknown spatio-temporal processes in wound healing

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Markus Seeger ◽  
Christoph Dehner ◽  
Dominik Jüstel ◽  
Vasilis Ntziachristos
Keyword(s):  
Wound Healing ◽  
Label Free ◽  
Third Harmonic ◽  
Two Photon ◽  
Non Invasive ◽  
Photon Excitation ◽  
Free Mode ◽  
Spatio Temporal ◽  
And Function

AbstractThe non-invasive investigation of multiple biological processes remains a methodological challenge as it requires capturing different contrast mechanisms, usually not available with any single modality. Intravital microscopy has played a key role in dynamically studying biological morphology and function, but it is generally limited to resolving a small number of contrasts, typically generated by the use of transgenic labels, disturbing the biological system. We introduce concurrent 5-modal microscopy (Co5M), illustrating a new concept for label-free in vivo observations by simultaneously capturing optoacoustic, two-photon excitation fluorescence, second and third harmonic generation, and brightfield contrast. We apply Co5M to non-invasively visualize multiple wound healing biomarkers and quantitatively monitor a number of processes and features, including longitudinal changes in wound shape, microvascular and collagen density, vessel size and fractality, and the plasticity of sebaceous glands. Analysis of these parameters offers unique insights into the interplay of wound closure, vasodilation, angiogenesis, skin contracture, and epithelial reformation in space and time, inaccessible by other methods. Co5M challenges the conventional concept of biological observation by yielding multiple simultaneous parameters of pathophysiological processes in a label-free mode.

Intravital bone imaging by two-photon excitation microscopy to identify osteocytic osteolysis in vivo

Bone ◽  
2015 ◽  
Vol 74 ◽  
pp. 134-139 ◽  
Author(s):  
Hiroshige Sano ◽  
Junichi Kikuta ◽  
Masayuki Furuya ◽  
Naoki Kondo ◽  
Naoto Endo ◽  
...  
Keyword(s):  
Bone Imaging ◽  
Two Photon ◽  
Photon Excitation ◽  
Osteocytic Osteolysis ◽  
Two Photon Excitation

scholarly journals A novel method for observing proteins in vivo using a small fluorescent label and multiphoton imaging

2005 ◽  
Vol 390 (3) ◽  
pp. 787-790 ◽  
Author(s):  
Stanley W. Botchway ◽  
Ignasi Barba ◽  
Randolf Jordan ◽  
Rebecca Harmston ◽  
Peter M. Haggie ◽  
...  
Keyword(s):  
Fluorescence Detection ◽  
Fluorescence Emission ◽  
Yeast Cells ◽  
Fluorescent Label ◽  
Multiphoton Imaging ◽  
Two Photon ◽  
Photon Excitation ◽  
Novel Method ◽  
Two Photon Excitation

A novel method for the fluorescence detection of proteins in cells is described in the present study. Proteins are labelled by the selective biosynthetic incorporation of 5-hydroxytryptophan and the label is detected via selective two-photon excitation of the hydroxyindole and detection of its fluorescence emission at 340 nm. The method is demonstrated in this paper with images of a labelled protein in yeast cells.

scholarly journals In vivo live-cell imaging in plant tissues by two-photon excitation microscopy

2014 ◽  
Vol 26 (1) ◽  
pp. 25-30
Author(s):  
Yoko Mizuta ◽  
Daisuke Kurihara ◽  
Tetsuya Higashiyama
Keyword(s):  
Live Cell Imaging ◽  
Cell Imaging ◽  
Live Cell ◽  
Plant Tissues ◽  
Two Photon ◽  
Photon Excitation ◽  
Two Photon Excitation
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