Two-photon excited endogenous fluorescence for label-free in vivo imaging ingestion of disease-causing bacteria by human leukocytes

2013 ◽  
Author(s):  
Yan Zeng ◽  
Bo Yan ◽  
Qiqi Sun ◽  
Seng Khoon Teh ◽  
Wei Zhang ◽  
...  
Keyword(s):  
In Vivo Imaging ◽  
Label Free ◽  
Human Leukocytes ◽  
Two Photon ◽  
Endogenous Fluorescence

In vivo imaging of liver injury and regeneration by functional two-photon microscopy

2016 ◽  
Vol 54 (12) ◽  
pp. 1343-1404
Author(s):  
A Ghallab ◽  
R Reif ◽  
R Hassan ◽  
AS Seddek ◽  
JG Hengstler
Keyword(s):  
Liver Injury ◽  
In Vivo Imaging ◽  
Two Photon Microscopy ◽  
Two Photon

scholarly journals Two-Photon Time-Gated In Vivo Imaging of Dihydrolipoic-Acid-Decorated Gold Nanoclusters

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7744
Author(s):  
Ye Tian ◽  
Ming Wei ◽  
Lijun Wang ◽  
Yuankai Hong ◽  
Dan Luo ◽  
...  
Keyword(s):  
In Vivo Imaging ◽  
Gold Nanoclusters ◽  
Photon Absorption ◽  
Gold Nanocluster ◽  
Time Resolved ◽  
Dihydrolipoic Acid ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Time Resolved Imaging

Due to the unique advantages of two-photon technology and time-resolved imaging technology in the biomedical field, attention has been paid to them. Gold clusters possess excellent physicochemical properties and low biotoxicity, which make them greatly advantageous in biological imaging, especially for in vivo animal imaging. A gold nanocluster was coupled with dihydrolipoic acid to obtain a functionalized nanoprobe; the material displayed significant features, including a large two-photon absorption cross-section (up to 1.59 × 105 GM) and prolonged fluorescence lifetime (>300 ns). The two-photon and time-resolution techniques were used to perform cell imaging and in vivo imaging.

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.

A bright blue fluorescent dextran for two-photon in vivo imaging of blood vessels

2019 ◽  
Vol 89 ◽  
pp. 103019 ◽  
Author(s):  
Seo Hyeon Lee ◽  
Young Ho Choe ◽  
Rae Hyung Kang ◽  
Yu Rim Kim ◽  
Na Hee Kim ◽  
...  
Keyword(s):  
Blood Vessels ◽  
In Vivo Imaging ◽  
Two Photon ◽  
Fluorescent Dextran ◽  
Bright Blue

scholarly journals In vivo imaging of activated microglia in a mouse model of focal cerebral ischemia by two-photon microscopy

2015 ◽  
Vol 6 (9) ◽  
pp. 3303 ◽  
Author(s):  
Seoyeon Bok ◽  
Taejun Wang ◽  
Chan-Ju Lee ◽  
Seong-Uk Jeon ◽  
Young-Eun Kim ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Mouse Model ◽  
In Vivo Imaging ◽  
Focal Cerebral Ischemia ◽  
Activated Microglia ◽  
Two Photon Microscopy ◽  
Two Photon

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

Design of molecular two-photon probes for in vivo imaging. 2H-Benzo[h]chromene-2-one derivatives

2007 ◽  
Vol 48 (15) ◽  
pp. 2791-2795 ◽  
Author(s):  
Hwan Myung Kim ◽  
Xing Zhong Fang ◽  
Pil Rye Yang ◽  
Jae-Sung Yi ◽  
Young-Gyu Ko ◽  
...  
Keyword(s):  
In Vivo Imaging ◽  
Two Photon
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