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Responsive fluorescence probe for detection of Hypochlorous acid in live cells and animals

Spectral Instruments Imaging

Jan 17, 2019

In this work, a new fluorescence probe, PQI, was developed for monitoring of the HOCl level in biological samples. The...

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Bruker Biospin

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MRI  is a noninvasive imaging technology that is known for its superior soft tissue contrast and ability to provide...

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The most advanced software for preclinical imaging research

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Modern imaging laboratories hosting PET/MR instruments profit from the fully integrated common imaging platform...

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Comprehensive mass cytometry analysis of cell cycle, and activation of CD4 T cells

Apr 21, 2017

Patterns of naïve [TN] CD4 T cells strongly differed from all other memory subsets central-memory (CM), transitional-memory (TM), effector-memory (EM), and terminally differentiated RA-expressing (TEMRA) subsets, while stem-cell memory (SCM) and T follicular-helper cells (TfH) were close to CM and TM cells with the highest percentages in cell cycle. EM and TEMRA were the most altered by HIV infection, with an increased frequency of activated and cycling cells. Activation markers and coinhibitory receptor expression differed among cell cycle stages, with HLA-DR fitting better than CD25 or CD38 with cycle, and opposite PD-1 gradients along differentiation and cell cycle. “Resting” DR-CD25- CD4+ T cells contained similar amounts of cells in G1 than the activated DR ± CD25± ones but three fold lower cells in S-G2-M. This broad multiplex mass cytometry analysis demonstrates some subsets of the so-called “resting” CD25-DR- CD4+ T cells contain noticeable amounts of cells into cycle or expressing coinhibitory receptors, opening new avenues for a redefinition of resting peripheral blood CD4 T cells harboring the HIV reservoirs.

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