scholarly journals A Unified Method for Digital Super-Resolution and Restoration in Infrared Microscopy Imaging

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 75648-75657 ◽  
Author(s):  
Guillermo Machuca ◽  
Sergio N. Torres ◽  
Bradley M. Ratliff ◽  
Pablo A. Gutierrez ◽  
Anselmo Jara ◽  
...  
Molecules ◽  
2018 ◽  
Vol 23 (8) ◽  
pp. 2010 ◽  
Author(s):  
Silvia Hilt ◽  
Robin Altman ◽  
Tamás Kálai ◽  
Izumi Maezawa ◽  
Qizhi Gong ◽  
...  

There is growing recognition regarding the role of intracellular amyloid beta (Aβ) in the Alzheimer’s disease process, which has been linked with aberrant signaling and the disruption of protein degradation mechanisms. Most notably, intraneuronal Aβ likely underlies the oxidative stress and mitochondrial dysfunction that have been identified as key elements of disease progression. In this study, we employed fluorescence imaging to explore the ability of a bifunctional small molecule to reduce aggregates of intracellular Aβ and attenuate oxidative stress. Structurally, this small molecule is comprised of a nitroxide spin label linked to an amyloidophilic fluorene and is known as spin-labeled fluorene (SLF). The effect of the SLF on intracellular Aβ accumulation and oxidative stress was measured in MC65 cells, a human neuronal cell line with inducible expression of the amyloid precursor protein and in the N2a neuronal cell line treated with exogenous Aβ. Super-resolution microscopy imaging showed SLF decreases the accumulation of intracellular Aβ. Confocal microscopy imaging of MC65 cells treated with a reactive oxygen species (ROS)-sensitive dye demonstrated SLF significantly reduces the intracellular Aβ-induced ROS signal. In order to determine the contributions of the separate SLF moieties to these protective activities, experiments were also carried out on cells with nitroxides lacking the Aβ targeting domain or fluorene derivatives lacking the nitroxide functionality. The findings support a synergistic effect of SLF in counteracting both the conformational toxicity of both endogenous and exogenous Aβ, its promotion of ROS, and Aβ metabolism. Furthermore, these studies demonstrate an intimate link between ROS production and Aβ oligomer formation.


2018 ◽  
Vol 35 (5) ◽  
pp. 818-827 ◽  
Author(s):  
Yufei Lin ◽  
Zengling Yang ◽  
Hao Liang ◽  
Shouxue Li ◽  
Xia Fan ◽  
...  

2020 ◽  
Vol 98 (5) ◽  
pp. 612-623
Author(s):  
Adam Tepperman ◽  
David Jiao Zheng ◽  
Maria Abou Taka ◽  
Angela Vrieze ◽  
Austin Le Lam ◽  
...  

Using multiple imaging modalities while performing independent experiments in parallel can greatly enhance the throughput of microscopy-based research, but requires the provision of appropriate experimental conditions in a format that meets the optical requirements of the microscope. Although customized imaging chambers can meet these challenges, the difficulty of manufacturing custom chambers and the relatively high cost and design inflexibility of commercial chambers has limited the adoption of this approach. Herein, we demonstrate the use of 3D printing to produce inexpensive, customized, live-cell imaging chambers that are compatible with a range of imaging modalities, including super-resolution microscopy. In this approach, biocompatible plastics are used to print imaging chambers designed to meet the specific needs of an experiment, followed by adhesion of the printed chamber to a glass coverslip, producing a chamber that is impermeant to liquids and that supports the growth and imaging of cells over multiple days. This approach can also be used to produce moulds for casting microfluidic devices made of polydimethylsiloxane. The utility of these chambers is demonstrated using designs for multiplex microscopy, imaging under shear, chemotaxis, and general cellular imaging. Together, this approach represents an inexpensive yet highly customizable approach for producing imaging chambers that are compatible with modern microscopy techniques.


2017 ◽  
Vol 9 (33) ◽  
pp. 27575-27586 ◽  
Author(s):  
Anthony Fernandez ◽  
Markville Bautista ◽  
Ramunas Stanciauskas ◽  
Taerin Chung ◽  
Fabien Pinaud

2017 ◽  
Author(s):  
Laura A. Viafora ◽  
Sergio N. Torres ◽  
Wagner Ramírez ◽  
Pablo A. Gutiérrez ◽  
Guillermo Machuca ◽  
...  

2021 ◽  
Vol 1859 (1) ◽  
pp. 012023
Author(s):  
N Hendaoui ◽  
K Korobchevskaya ◽  
P Bianchini ◽  
L Lamard ◽  
A Kellou ◽  
...  

2021 ◽  
Vol 12 (5) ◽  
pp. 2617
Author(s):  
Dario Cevoli ◽  
Raffaele Vitale ◽  
Wim Vandenberg ◽  
Siewert Hugelier ◽  
Robin Van den Eynde ◽  
...  

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