scholarly journals Correction-free remotely scanned two-photon in vivo mouse retinal imaging

2016 ◽  
Vol 5 (1) ◽  
pp. e16007-e16007 ◽  
Author(s):  
Adi Schejter Bar-Noam ◽  
Nairouz Farah ◽  
Shy Shoham
Keyword(s):  
Retinal Imaging ◽  
Two Photon

scholarly journals Adaptive optics two-photon microscopy enables near-diffraction-limited and functional retinal imaging in vivo

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Zhongya Qin ◽  
Sicong He ◽  
Chao Yang ◽  
Jasmine Sum-Yee Yung ◽  
Congping Chen ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Retinal Imaging ◽  
Two Photon Microscopy ◽  
Two Photon

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 High-speed volumetric two-photon fluorescence imaging of neurovascular dynamics

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jiang Lan Fan ◽  
Jose A. Rivera ◽  
Wei Sun ◽  
John Peterson ◽  
Henry Haeberle ◽  
...  
Keyword(s):  
Blood Flow ◽  
High Speed ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Laser Scanning Microscopy ◽  
Fluorescence Signal ◽  
Imaging Method ◽  
Spatiotemporal Resolution ◽  
Two Photon

AbstractUnderstanding the structure and function of vasculature in the brain requires us to monitor distributed hemodynamics at high spatial and temporal resolution in three-dimensional (3D) volumes in vivo. Currently, a volumetric vasculature imaging method with sub-capillary spatial resolution and blood flow-resolving speed is lacking. Here, using two-photon laser scanning microscopy (TPLSM) with an axially extended Bessel focus, we capture volumetric hemodynamics in the awake mouse brain at a spatiotemporal resolution sufficient for measuring capillary size and blood flow. With Bessel TPLSM, the fluorescence signal of a vessel becomes proportional to its size, which enables convenient intensity-based analysis of vessel dilation and constriction dynamics in large volumes. We observe entrainment of vasodilation and vasoconstriction with pupil diameter and measure 3D blood flow at 99 volumes/second. Demonstrating high-throughput monitoring of hemodynamics in the awake brain, we expect Bessel TPLSM to make broad impacts on neurovasculature research.

scholarly journals Polarity-active NIR probes with strong two-photon absorption and ultrahigh binding affinity of insulin amyloid fibrils

2021 ◽  
Author(s):  
Li Li ◽  
Zheng Lv ◽  
Zhongwei Man ◽  
Zhenzhen Xu ◽  
YuLing Wei ◽  
...  
Keyword(s):  
Neurodegenerative Diseases ◽  
Binding Affinity ◽  
Fluorescent Probes ◽  
Amyloid Fibrils ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Medical Diagnostic

Amyloid fibrils are associated with many neurodegenerative diseases. In-situ and in-vivo visualization of amyloid fibrils is important for medical diagnostic and requires fluorescent probes with both excitation and emission wavelengths in...

scholarly journals In vivo two-photon imaging of T cell motility in joint-draining lymph nodes in a mouse model of rheumatoid arthritis

2012 ◽  
Vol 278 (1-2) ◽  
pp. 158-165 ◽  
Author(s):  
Tamás Kobezda ◽  
Sheida Ghassemi-Nejad ◽  
Tibor T. Glant ◽  
Katalin Mikecz
Keyword(s):  
Rheumatoid Arthritis ◽  
T Cell ◽  
Mouse Model ◽  
Lymph Nodes ◽  
Cell Motility ◽  
Two Photon ◽  
Photon Imaging ◽  
Two Photon Imaging ◽  
Draining Lymph Nodes

scholarly journals In Vivo Two-Photon Imaging of Neurons and Glia in the Mouse Spinal Cord

2012 ◽  
Vol 2012 (12) ◽  
pp. pdb.prot072264-pdb.prot072264 ◽  
Author(s):  
H. Steffens ◽  
F. Nadrigny ◽  
F. Kirchhoff
Keyword(s):  
Spinal Cord ◽  
Mouse Spinal Cord ◽  
Two Photon ◽  
Photon Imaging ◽  
Two Photon Imaging

scholarly journals Cellular correlates of gray matter volume changes in magnetic resonance morphometry identified by two-photon microscopy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Livia Asan ◽  
Claudia Falfán-Melgoza ◽  
Carlo A. Beretta ◽  
Markus Sack ◽  
Lei Zheng ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Cell Density ◽  
Gray Matter ◽  
Gray Matter Volume ◽  
Cell Nuclei ◽  
Cellular Mechanisms ◽  
Tissue Volume ◽  
Two Photon ◽  
Matter Volume

AbstractMagnetic resonance imaging (MRI) of the brain combined with voxel-based morphometry (VBM) revealed changes in gray matter volume (GMV) in various disorders. However, the cellular basis of GMV changes has remained largely unclear. We correlated changes in GMV with cellular metrics by imaging mice with MRI and two-photon in vivo microscopy at three time points within 12 weeks, taking advantage of age-dependent changes in brain structure. Imaging fluorescent cell nuclei allowed inferences on (i) physical tissue volume as determined from reference spaces outlined by nuclei, (ii) cell density, (iii) the extent of cell clustering, and (iv) the volume of cell nuclei. Our data indicate that physical tissue volume alterations only account for 13.0% of the variance in GMV change. However, when including comprehensive measurements of nucleus volume and cell density, 35.6% of the GMV variance could be explained, highlighting the influence of distinct cellular mechanisms on VBM results.

scholarly journals Functional Microarchitecture of the Mouse Dorsal Inferior Colliculus Revealed through In Vivo Two-Photon Calcium Imaging

2015 ◽  
Vol 35 (31) ◽  
pp. 10927-10939 ◽  
Author(s):  
O. Barnstedt ◽  
P. Keating ◽  
Y. Weissenberger ◽  
A. J. King ◽  
J. C. Dahmen
Keyword(s):  
Inferior Colliculus ◽  
Calcium Imaging ◽  
Two Photon

NeuroSeg: automated cell detection and segmentation for in vivo two-photon Ca2+ imaging data

2017 ◽  
Vol 223 (1) ◽  
pp. 519-533 ◽  
Author(s):  
Jiangheng Guan ◽  
Jingcheng Li ◽  
Shanshan Liang ◽  
Ruijie Li ◽  
Xingyi Li ◽  
...  
Keyword(s):  
Cell Detection ◽  
Imaging Data ◽  
Two Photon

scholarly journals Damage to the gastric epithelium activates cellular bicarbonate secretion via SLC26A9 Cl−/HCO3−exchange

2010 ◽  
Vol 299 (1) ◽  
pp. G255-G264 ◽  
Author(s):  
Elise S. Demitrack ◽  
Manoocher Soleimani ◽  
Marshall H. Montrose
Keyword(s):  
Interstitial Fluid ◽  
Gastric Epithelium ◽  
Acid Base ◽  
Surface Ph ◽  
Two Photon ◽  
Acid Base Status ◽  
Genetic Deletion ◽  
Knockout Animals ◽  
Tissue Compartments

Gastric surface pH (pHo) transiently increases in response to focal epithelial damage. The sources of that increase, either from paracellular leakage of interstitial fluid or transcellular acid/base fluxes, have not been determined. Using in vivo microscopy approaches we measured pHowith Cl-NERF, tissue permeability with intravenous fluorescent-dextrans to label interstitial fluid (paracellular leakage), and gastric epithelial intracellular pH (pHi) with SNARF-5F (cellular acid/base fluxes). In response to two-photon photodamage, we found that cell-impermeant dyes entered damaged cells from luminal or tissue compartments, suggesting a possible slow transcellular, but not paracellular, route for increased permeability after damage. Regarding cytosolic acid/base status, we found that damaged cells acidified (6.63 ± 0.03) after photodamage, compared with healthy surface cells both near (7.12 ± 0.06) and far (7.07 ± 0.04) from damage ( P < 0.05). This damaged cell acidification was further attenuated with 20 μM intravenous EIPA (6.34 ± 0.05, P < 0.05) but unchanged by addition of 0.5 mM luminal H2DIDS (6.64 ± 0.08, P > 0.05). Raising luminal pH did not realkalinize damaged cells, suggesting that the mechanism of acidification is not attributable to leakiness to luminal protons. Inhibition of apical HCO3−secretion with 0.5 mM luminal H2DIDS or genetic deletion of the solute-like carrier 26A9 (SLC26A9) Cl−/HCO3−exchanger blocked the pHoincrease normally observed in control animals but did not compromise repair of damaged tissue. Addition of exogenous PGE2significantly increased pHoin wild-type, but not SLC26A9 knockout, animals, suggesting that prostaglandin-stimulated HCO3−secretion is fully mediated by SLC26A9. We conclude that cellular HCO3−secretion, likely through SLC26A9, is the dominant mechanism whereby surface pH transiently increases in response to photodamage.

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