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The purpose this thesis is to study the effect of fermentable feed ingredients on the intestinal health of weaned piglets via an in vitro fermentation model combined with an ex vivo model on intestinal explants. 

This work will focus on two different pools of ingredients. The first pool will focus on chicory, it’s corresponding by-products and purified fractions. The same principle will be applied to the second pool that is composed out of oat and barley. 

All the feed ingredients are going to be tested by an in-vitro model combined with an ex-vivo model. The aim of those experiments is to determine whether barley, oat, chicory or by-products could have a close effect on intestinal health corresponding to their purified fraction. 

First, an in vitro fermentation will be performed using weaned piglets' feces. The aim is to measure the resulting gas production and to collect fermentation fluids. Based on these fermentation juices, we can measure the concentration in volatile fatty acids by HPLC but also estimate the relative amount of butyrogenic species by PCR. These fermentation juices will also be used during the ex vivo procedure. 

The ex vivo model will consist in inducing an inflammation (via LPS of E. Coli) in weaned piglets' intestinal explants and see if the applied fermentation juices are able reduce inflammation. 
For that, cytokines, tight junctions and mucins mRNA levels will be analysed by qRT-PCR. 

Based on the in vitro - ex vivo model analyses, we can thereafter select which fermentable feed ingredients are the most suitable for the in vivo trial on weaned piglets.

Fibers --- Intestinal health --- weaned piglets --- in vitro model --- ex vivo model --- Sciences du vivant > Productions animales & zootechnie

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This Special Issue presents studies on the genotoxicity of nanomaterials. Although nanomaterials provide multiple benefits in a wide range of applications, challenges remain in addressing strong concerns about their risks to the environment and human health. As a result of inconsistencies among published results and diverging conclusions, the understanding of nanomaterial exposure and toxicity remains unclear. Determining whether these materials cause DNA damage—the first step in carcinogenesis—must be a priority in testing. In this book, readers will find recent publications on the genotoxic response to a broad range of nanomaterials, the impact of physico-chemical characteristics, safe-by-design and new developed tools.

graphene oxide --- reduced graphene oxide --- micronucleus --- oxidative stress --- safer-by-design --- tungsten --- nanoparticles --- tritiated particles --- in vitro testing --- cytotoxicity --- micronuclei formation --- DNA damage --- epigenetics --- DNA methylation --- BEAS-2B cells. --- polystyrene nanoparticles --- nanoplastics --- genotoxicity --- Hs27 human fibroblasts --- comet assay --- FPG enzyme --- TiO2NP --- SiO2NP --- ZnONP --- CeO2NP --- AgNP --- multi-walled carbon nanotubes (MWCNT) --- titanium dioxide nanoparticles --- lincomycin --- human amniotic cells --- in vitro genotoxicity --- apoptosis --- nanotoxicology --- metal oxides --- high throughput screening --- micronucleus assay --- nanomaterial --- aluminum --- oral route --- gut --- liver --- V79 cells --- Hprt --- advanced in vitro model --- hepatotoxicity --- liver spheroids --- 3D culture --- HepG2 --- nongenotoxic silver nanoparticles --- genotoxic --- cytotoxic --- antioxidant activity --- silver ions --- Allium cepa --- metal/coating agent ratio --- n/a

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Recently, stem cells have been drawing increasing interest in basic and translational research that aims to understand stem cell biology and generate new therapies for various disorders. Many stem cells can be cultured in 2D relatively easily using tissue culture plastic. However, many of these cultures do not represent the natural conditions of stem cells in the body. In the body, microenvironments include numerous supporting cells and molecules. Therefore, researchers and clinicians have sought ideal stem cell preparations for basic research and clinical applications, which may be attainable through 3D culture of stem cells. The 3D cultures mimic the conditions of the natural environment of stem cells better, as cells in 3D cultures exhibit many unique and desirable characteristics that could be beneficial for therapeutic interventions. 3D stem cell cultures may employ supporting structures, such as various matrices or scaffolds, in addition to stem cells, to support complex structures. This book brings together recent research on 3D cultures of various stem cells to increase the basic understanding of stem cell culture techniques and also to highlight stem cell preparations for possible novel therapeutic applications.

hematopoiesis --- hematopoietic stem cells --- stem cell culture --- 2D culture --- 3D culture --- embryonic stem cells --- three-dimensional --- self-assembling scaffold --- pluripotency --- culture conditions --- expansion --- growth --- niche --- human cortical progenitors --- silicon pillars --- cell growth --- hiPSC-derived neural progenitors --- cerebral cortex --- carcinogen --- protein phosphatase 2A (PP2A) --- intestinal tumor --- intestinal organoid --- Lgr5+ crypt stem cell --- mouse embryonic stem cell --- differentiation protocol --- ureteric bud progenitor cells --- 3D kidney organoids --- intestinal organoids --- canine intestine --- differentiation --- organoid culture --- induced pluripotent stem cells --- neurospheres --- neurite outgrowth --- neurotoxicity --- hBM-MSCs --- cytokines --- tenogenic markers --- cyclic strain --- 3D microenvironment --- PLGA carriers --- bioreactor --- cardiac microtissues --- iPSC-derived cardiomyocytes --- cardiac fibroblasts --- cardiac fibrosis --- cardiac rhythm --- TGF-β signalling --- drug screening --- in vitro model --- stem cell --- 3D --- culture condition --- regenerative medicine --- scaffold --- organoid --- adipose tissue-derived mesenchymal stem cells --- stromal vascular fraction --- platelet rich plasma --- platelet concentrates --- veterinary regenerative medicine

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Nature continuously produces biologically useful molecules and provides humankind with life-saving drugs or therapies. Natural products (NPs) offer a vast, unique and fascinating chemical diversity and these molecules have evolved for optimal interactions with biological macromolecules. Moreover, natural products feature pharmacologically active pharmacophores which are pharmaceutically validated starting points for the development of new lead compounds. Over half of all approved (from 1981 to 2014) small-molecule drugs derived from NPs, including unaltered NPs, NPs synthetic derivatives and synthetic natural mimics, originated from a NPs pharmacophore or template. According to the FDA, NPs and their derivatives represent over one-third of all FDA-approved new drugs, in particular for anticancer/antibiotic lead compounds, which are remarkably enriched with NPs.

Research & information: general --- Chemistry --- Organic chemistry --- multi-component reaction --- fusidic acid --- TEMPO-conjugate --- electron paramagnetic resonance (EPR) spectroscopy --- caspase-3 --- incomptine A --- sesquiterpene lactone --- Decachaeta incompta --- cytotoxic activity --- iTRAQ --- apoptosis --- ROS production --- violacein --- hepatocellular carcinoma --- proliferation --- stemness --- natural products --- tumor microenvironment (TME) --- lung cancer --- phytochemicals --- botanical agents --- steroidal alkaloids --- solanidane alkaloids --- demissidine --- solanidine --- flavonoids --- coronavirus --- SARS-CoV-2 --- SARS-CoV --- MERS-CoV --- anticancer activity --- apoptosis resistance --- ophiobolin A --- polygodial --- Wittig reaction --- melanoma --- tumor heterogeneity --- pregnancy --- anti-tumor peptides --- in vitro model --- medicinal herbs --- cancer treatment --- cancer stem cells --- drug resistance --- metastasis --- RCE-4 --- PCD --- ATG 4B --- the Bcl-2–Beclin 1 complex --- Sparticola junci --- structure elucidation --- ECD-TDDFT --- COX inhibitory --- molecular docking --- antiproliferative --- cytotoxic --- Sepedonium ampullosporum --- peptaibols --- ampullosporin --- glutamic acid methyl ester --- solid-phase peptide synthesis --- antifungal --- anticancer --- target identification --- kaempferol --- docking --- DARTS --- Src --- breast cancer --- butein --- frondoside-A --- STAT3 --- angiogenesis --- invasion --- viability --- tumor growth --- marine fungi --- Cosmospora sp. --- soudanone --- Magnaporthe oryzae --- co-culture --- phytopathogen --- molecular networking --- metabolomics --- bispecific antibody --- Trypsiligase --- click chemistry --- biorthogonal chemistry --- antibody engineering --- n/a --- the Bcl-2-Beclin 1 complex

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Nature continuously produces biologically useful molecules and provides humankind with life-saving drugs or therapies. Natural products (NPs) offer a vast, unique and fascinating chemical diversity and these molecules have evolved for optimal interactions with biological macromolecules. Moreover, natural products feature pharmacologically active pharmacophores which are pharmaceutically validated starting points for the development of new lead compounds. Over half of all approved (from 1981 to 2014) small-molecule drugs derived from NPs, including unaltered NPs, NPs synthetic derivatives and synthetic natural mimics, originated from a NPs pharmacophore or template. According to the FDA, NPs and their derivatives represent over one-third of all FDA-approved new drugs, in particular for anticancer/antibiotic lead compounds, which are remarkably enriched with NPs.

Research & information: general --- Chemistry --- Organic chemistry --- multi-component reaction --- fusidic acid --- TEMPO-conjugate --- electron paramagnetic resonance (EPR) spectroscopy --- caspase-3 --- incomptine A --- sesquiterpene lactone --- Decachaeta incompta --- cytotoxic activity --- iTRAQ --- apoptosis --- ROS production --- violacein --- hepatocellular carcinoma --- proliferation --- stemness --- natural products --- tumor microenvironment (TME) --- lung cancer --- phytochemicals --- botanical agents --- steroidal alkaloids --- solanidane alkaloids --- demissidine --- solanidine --- flavonoids --- coronavirus --- SARS-CoV-2 --- SARS-CoV --- MERS-CoV --- anticancer activity --- apoptosis resistance --- ophiobolin A --- polygodial --- Wittig reaction --- melanoma --- tumor heterogeneity --- pregnancy --- anti-tumor peptides --- in vitro model --- medicinal herbs --- cancer treatment --- cancer stem cells --- drug resistance --- metastasis --- RCE-4 --- PCD --- ATG 4B --- the Bcl-2-Beclin 1 complex --- Sparticola junci --- structure elucidation --- ECD-TDDFT --- COX inhibitory --- molecular docking --- antiproliferative --- cytotoxic --- Sepedonium ampullosporum --- peptaibols --- ampullosporin --- glutamic acid methyl ester --- solid-phase peptide synthesis --- antifungal --- anticancer --- target identification --- kaempferol --- docking --- DARTS --- Src --- breast cancer --- butein --- frondoside-A --- STAT3 --- angiogenesis --- invasion --- viability --- tumor growth --- marine fungi --- Cosmospora sp. --- soudanone --- Magnaporthe oryzae --- co-culture --- phytopathogen --- molecular networking --- metabolomics --- bispecific antibody --- Trypsiligase --- click chemistry --- biorthogonal chemistry --- antibody engineering