Non-invasive MRT-basierte Differenzierung von chylösen und nicht-chylösen Ergüssen mittels 6-Punkt mDIXON Fettquantifizierung: Machbarkeit in-vitro, ex-vivo und in-vivo

2020 ◽  
Author(s):  
C Pieper ◽  
A Sprinkart ◽  
D Kütting
Keyword(s):  
Ex Vivo ◽  
Non Invasive

scholarly journals Supramolecular Encapsulation of Small-Ultra Red Fluorescent Proteins in Virus-Like Nanoparticles for Non-Invasive In Vivo Imaging Agents

2020 ◽  
Author(s):  
Fabian C. Herbert ◽  
Olivia Brohlin ◽  
Tyler Galbraith ◽  
Candace Benjamin ◽  
Cesar A. Reyes ◽  
...  
Keyword(s):  
In Vivo Imaging ◽  
Fluorescent Protein ◽  
Fluorescent Proteins ◽  
Ex Vivo ◽  
Imaging Agents ◽  
Non Invasive ◽  
Red Fluorescent Proteins ◽  
Ex Vivo Imaging

<div> <div> <div> <p>Icosahedral virus-like particles (VLPs) derived from bacteriophages Qβ and PP7 encapsulating small-ultra red fluorescent protein (smURFP) were produced using a versatile supramolecualr capsid dissassemble-reassemble approach. The generated fluorescent VLPs display identical structural properties to their non-fluorescent analogs. Encapsulated smURFP shows indistinguishable photochemical properties to its unencapsulated counterpart, exhibits outstanding stability towards pH, and produces bright in vitro images following phagocytosis by macrophages. In vivo imaging allows biodistribution to be imaged at different time points. Ex vivo imaging of intravenously administered encapsulated smURFP reveleas localization in the liver and </p> </div> </div> <div> <div> <p>kidneys after 2 h blood circulation and substantial elimination constructs as non-invasive in vivo imaging agents. </p> </div> </div> </div>

scholarly journals IMAGING TECHNIQUES FOR THE EVALUATION OF GRAPES IN WITHERING FOR AMARONE WINE PRODUCTION

2018 ◽  
Author(s):  
Barbara Cisterna ◽  
Federico Boschi ◽  
Anna Cleta Croce ◽  
Rachele Podda ◽  
Serena Zanzoni ◽  
...  
Keyword(s):  
Optical Properties ◽  
Ex Vivo ◽  
Imaging Techniques ◽  
Wine Production ◽  
Invasive Approach ◽  
Non Invasive ◽  
Innovative Materials ◽  
Amarone Wine

Optical Imaging (OI) is an emerging field developed in recent years which can be a very versatile, fast and non-invasive approach for the acquisition of images of  small (few centimetres) sized samples, such as layers of cells (in vitro), small animals (in vivo), animal organs (ex vivo) and innovative materials. OI was primarily developed for biomedical applications to study the progression of some pathologies and to assess the efficacy of new pharmaceutical compounds. Here we applied the OI technique to a completely new field: the study of food optical properties. In this case we exploited the optical properties of endogenous molecules, which are generally considered responsible of a background noise affecting the investigation. Here we used this sort of “noise”, named autofluorescence, to obtain information on the drying of Corvinone grapes employed for Amarone wine production. OI can provide interesting information and, inserted in a multimodal approach, it may be a real support to other techniques in the description of a biological phenomenon.

Identification of malignant ascites using MR-based T1 mapping.

2020 ◽  
Vol 38 (15_suppl) ◽  
pp. e16719-e16719
Author(s):  
Fabian Kuetting ◽  
Alois Martin Sprinkart ◽  
Anton Faron ◽  
Lisa Meffert ◽  
Christian Jansen ◽  
...  
Keyword(s):  
T1 Mapping ◽  
Roc Analysis ◽  
Ex Vivo ◽  
Intraclass Correlation ◽  
Malignant Ascites ◽  
Non Invasive ◽  
Albumin Content ◽  
Malignant Effusions

e16719 Background: Non-invasive identification of malignant ascites is a challenge in clinical practice.Thus, we decided to assess if an MR-based T1 mapping approach allows non-invasive differentiation of malignant and non-malignant effusions. Methods: In-vitro and ex-vivo MR-examinations were performed on a clinical 1.5T MR-system. T1 mapping was performed with spectroscopy and an adapted modified Look-Locker inversion-recovery (MOLLI) acquisition. For in-vitro experiments 13 titrated solutions with varying albumin content (0 to 200 g/l) were examined. For ex-vivo evaluation 27 ascites/pleural effusion samples from patients with malignancy (19 with histologic tumor confirmation in effusion) and 18 samples from patients without malignancy were examined. All samples underwent histological and laboratory testing. Samples were classified as malignant-positive histology, malignant-negative histology and non-malignant negative histology. Lab values were correlated with T1 maps and receiver operating characteristic (ROC) analysis was used to determine the optimal T1-value threshold to differentiate malignant and non-malignant ascites. Results: In in-vitro analysis both methods showed a high correlation with albumin-content (MOLLI: r = -0.97; Spectroscopy: -0.98). T1-values derived from the reference standard (Spectroscopy) and the MOLLI technique had a high agreement (intraclass correlation single measures: 0,9889, 95% CI: 0,52 to 0,99; average measures: 9,994, 95% CI 0,69 to 0,99). Bland-Altman analysis showed a strong agreement between both methods: 62.5 ± 35 (95% CI: 41.2 to 83.8) Ex-vivo analysis revealed significant differences between T1 values from patients with malignant+ histology (median: 2237; IQR: 2132 to 2327.5) and patients with non malignant- negative histology (median: 2611; IQR: 2548 to 2803, p < 0.0001) as well as between malignant+ histology and all other included patients (median: 2585; IQR: 2503 to 2710, p < 0.0001) Multiple regression analysis of in-vivo results revealed that only albumin content correlated with MOLLI based T1 measurements (p < 0.0001; r = -0.65) ROC analysis for differentiation between malignant and non-malignant effusions (malignant+ histology vs. all other) showed an AUC of 0.897; 95% CI: 0.769 to 0.967). Malignant+ histology vs. non-malignant- histology showed an AUC of 1.000 (cut off Lolli > 2419; 95% CI: 0.905 to 1). Conclusions: T1 Mapping shows excellent correlation with protein content of fluids.MR- T1 mapping allows for non-invasive differentiation of malignant and non-malignant effusions in an ex-vivo set up.

Novel Self-assembled, Gel-core Hyaluosomes for Non-invasive Management of Osteoarthritis: In-vitro Optimization, Ex-vivo and In-vivo Permeation

2015 ◽  
Vol 32 (9) ◽  
pp. 2901-2911 ◽  
Author(s):  
Wessam M. El-Refaie ◽  
Yosra S. R. Elnaggar ◽  
Magda A. El-Massik ◽  
Ossama Y. Abdallah
Keyword(s):  
Ex Vivo ◽  
Non Invasive ◽  
Self Assembled ◽  
Invasive Management

scholarly journals Supramolecular Encapsulation of Small-Ultra Red Fluorescent Proteins in Virus-Like Nanoparticles for Non-Invasive In Vivo Imaging Agents

2020 ◽  
Author(s):  
Fabian C. Herbert ◽  
Olivia Brohlin ◽  
Tyler Galbraith ◽  
Candace Benjamin ◽  
Cesar A. Reyes ◽  
...  
Keyword(s):  
In Vivo Imaging ◽  
Fluorescent Protein ◽  
Fluorescent Proteins ◽  
Ex Vivo ◽  
Imaging Agents ◽  
Non Invasive ◽  
Red Fluorescent Proteins ◽  
Ex Vivo Imaging

<div> <div> <div> <p>Icosahedral virus-like particles (VLPs) derived from bacteriophages Qβ and PP7 encapsulating small-ultra red fluorescent protein (smURFP) were produced using a versatile supramolecualr capsid dissassemble-reassemble approach. The generated fluorescent VLPs display identical structural properties to their non-fluorescent analogs. Encapsulated smURFP shows indistinguishable photochemical properties to its unencapsulated counterpart, exhibits outstanding stability towards pH, and produces bright in vitro images following phagocytosis by macrophages. In vivo imaging allows biodistribution to be imaged at different time points. Ex vivo imaging of intravenously administered encapsulated smURFP reveleas localization in the liver and </p> </div> </div> <div> <div> <p>kidneys after 2 h blood circulation and substantial elimination constructs as non-invasive in vivo imaging agents. </p> </div> </div> </div>

scholarly journals The chinchilla as a novel animal model of pregnancy

2017 ◽  
Vol 4 (4) ◽  
pp. 161098 ◽  
Author(s):  
Emmeli Mikkelsen ◽  
Henrik Lauridsen ◽  
Per Mose Nielsen ◽  
Haiyun Qi ◽  
Thomas Nørlinger ◽  
...  
Keyword(s):  
Animal Model ◽  
Ex Vivo ◽  
Gestation Period ◽  
Whole Body ◽  
Non Invasive ◽  
Whole Body Ct ◽  
Contrast Enhanced Ct ◽  
Hyperpolarized Mri

Several parameters are important when choosing the most appropriate animal to model human obstetrics, including gestation period, number of fetuses per gestation and placental structure. The domesticated long-tailed chinchilla ( Chinchilla lanigera ) is a well-suited and appropriate animal model of pregnancy that often will carry only one offspring and has a long gestation period of 105–115 days. Furthermore, the chinchilla placenta is of the haemomonochorial labyrinthine type and is therefore comparable to the human villous haemomonochorial placenta. This proof-of-concept study demonstrated the feasibility in laboratory settings, and demonstrated the potential of the pregnant chinchilla as an animal model for obstetric research and its potential usefulness for non-invasive measurements in the placenta. We demonstrate measurements of the placental and fetal metabolism (demonstrated in vivo by hyperpolarized MRI and in vitro by qPCR analyses), placental vessels (demonstrated ex vivo by contrast-enhanced CT angiography) and overall anatomy (demonstrated in vivo by whole-body CT).

The Role of Polyphenols in the Modulation of Plasma Non-Enzymatic Antioxidant Capacity (NEAC)

2012 ◽  
Vol 82 (3) ◽  
pp. 228-232 ◽  
Author(s):  
Mauro Serafini ◽  
Giuseppa Morabito
Keyword(s):  
Antioxidant Capacity ◽  
Dietary Intervention ◽  
Ex Vivo ◽  
The Body ◽  
Dietary Polyphenols ◽  
Enzymatic Antioxidant ◽  
Endogenous Antioxidant

Dietary polyphenols have been shown to scavenge free radicals, modulating cellular redox transcription factors in different in vitro and ex vivo models. Dietary intervention studies have shown that consumption of plant foods modulates plasma Non-Enzymatic Antioxidant Capacity (NEAC), a biomarker of the endogenous antioxidant network, in human subjects. However, the identification of the molecules responsible for this effect are yet to be obtained and evidences of an antioxidant in vivo action of polyphenols are conflicting. There is a clear discrepancy between polyphenols (PP) concentration in body fluids and the extent of increase of plasma NEAC. The low degree of absorption and the extensive metabolism of PP within the body have raised questions about their contribution to the endogenous antioxidant network. This work will discuss the role of polyphenols from galenic preparation, food extracts, and selected dietary sources as modulators of plasma NEAC in humans.

Significance of Platelet β-Adrenoceptors for Platelet Responses In Vivo and In Vitro

1992 ◽  
Vol 68 (06) ◽  
pp. 687-693 ◽  
Author(s):  
P T Larsson ◽  
N H Wallén ◽  
A Martinsson ◽  
N Egberg ◽  
P Hjemdahl
Keyword(s):  
Ex Vivo ◽  
High Dose ◽  
Platelet Aggregability ◽  
Adrenoceptor Agonist ◽  
Dose Infusion ◽  
Von Willebrand ◽  
Willebrand Factor ◽  
Factor Antigen

SummaryThe significance of platelet β-adrenoceptors for platelet responses to adrenergic stimuli in vivo and in vitro was studied in healthy volunteers. Low dose infusion of the β-adrenoceptor agonist isoprenaline decreased platelet aggregability in vivo as measured by ex vivo filtragometry. Infusion of adrenaline, a mixed α- and β-adrenoceptor agonist, increased platelet aggregability in vivo markedly, as measured by ex vivo filtragometry and plasma β-thromboglobulin levels. Adrenaline levels were 3–4 nM in venous plasma during infusion. Both adrenaline and high dose isoprenaline elevated plasma von Willebrand factor antigen levels β-Blockade by propranolol did not alter our measures of platelet aggregability at rest or during adrenaline infusions, but inhibited adrenaline-induced increases in vWf:ag. In a model using filtragometry to assess platelet aggregability in whole blood in vitro, propranolol enhanced the proaggregatory actions of 5 nM, but not of 10 nM adrenaline. The present data suggest that β-adrenoceptor stimulation can inhibit platelet function in vivo but that effects of adrenaline at high physiological concentrations are dominated by an α-adrenoceptor mediated proaggregatory action.

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