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Concept

Choline

Publications associées (14)

Relief of ParB autoinhibition by parS DNA catalysis and recycling of ParB by CTP hydrolysis promote bacterial centromere assembly

Paolo De Los Rios, Stefano Zamuner

Three-component ParABS systems are widely distributed factors for plasmid partitioning and chromosome segregation in bacteria. ParB acts as adaptor protein between the 16-base pair centromeric parS DNA sequences and the DNA segregation proteins ParA and Sm ...

AMER ASSOC ADVANCEMENT SCIENCE2021

Self-organization of parS centromeres by the ParB CTP hydrolase

Paolo De Los Rios, Stefano Zamuner

ParABS systems facilitate chromosome segregation and plasmid partitioning in bacteria and archaea. ParB protein binds centromeric parS DNA sequences and spreads to flanking DNA. We show that ParB is an enzyme that hydrolyzes cytidine triphosphate (CTP) to ...

American Association for the Advancement of Science2019

Diffusion behavior of cerebral metabolites of congenital portal systemic shunt mice assessed noninvasively by diffusion-weighted H-1 magnetic resonance spectroscopy

Hongxia Lei, Nicolas Kunz, Masoumeh Dehghani Moghadam

Diffusion-weighted H-1-MRS (DW-MRS) allows for noninvasive investigation of the cellular compartmentalization of cerebral metabolites. DW-MRS applied to the congenital portal systemic shunt (PSS) mouse brain may provide specific insight into alterations of ...

2019

Mild Neonatal Brain Hypoxia-Ischemia in Very Immature Rats Causes Long-Term Behavioral and Cerebellar Abnormalities at Adulthood

Hongxia Lei, Yohan Van de Looij

Systemic hypoxia-ischemia (HI) often occurs during preterm birth in human. HI induces injuries to hinder brain cells mainly in the ipsilateral forebrain structures. Such HI injuries may cause lifelong disturbances in the distant regions, such as the contra ...

2019

Non-invasive diagnosis and metabolic consequences of congenital portosystemic shunts in C57BL/6 J mice

Ana Francisca Leal Silva Soares, Hongxia Lei

This study demonstrates the suitability of magnetic resonance imaging (MRI) and magnetic resonance angiography (MRA) for the imaging of congenital portosystemic shunts (PSS) in mice, a vascular abnormality in which mesenteric blood bypasses the liver and i ...

2018

Microengineered analytical tools for cell-based studies in environmental monitoring, pharmacology and neuroscience

Sara Talaei

Monitoring cells’ Tehavior in-vitro and evaluation of their response to different types of stimulations are the major oTjectives in cell-Tased studies. The results of these studies answer questions on the physiology of the cells, cell-to-cell signaling and ...

EPFL2013

Proton T(1) relaxation times of metabolites in human occipital white and gray matter at 7 T

Rolf Gruetter, Lijing Xin, Benoît Schaller, Huanxiang Lu

Proton T(1) relaxation times of metabolites in the human brain have not previously been published at 7 T. In this study, T(1) values of CH(3) and CH(2) group of N-acetylaspartate and total creatine as well as nine other brain metabolites were measured in o ...

Wiley-Blackwell2013

Feasibility of in vivo N-15 MRS detection of hyperpolarized N-15 labeled choline in rats

Rolf Gruetter, Arnaud Comment, Cristina Ramona Cudalbu Moldovan, Sami Jannin, Ruud van Heeswijk

The increase of total choline in tumors has become an important biomarker in cancer diagnosis. Choline and choline metabolites can be measured in vivo and in vitro using multinuclear MRS. Recent in vivo C-13 MRS studies using labeled substrates enhanced vi ...

2010

Biosensor microprobe arrays for in vivo monitoring of neurotransmitters

Real-time monitoring of neurotransmitters is of utmost importance for understanding the functioning of the brain. Especially L-glutamate and choline play a major role in chemical signalling and are highly involved in cognitive functions such as learning, m ...

EPFL2010

Proton NMR of15N-choline metabolites enhanced by dynamic nuclear polarization

Rolf Gruetter, Geoffrey Bodenhausen, Arnaud Comment, Sami Jannin, Riddhiman Sarkar, Paul Romeo Vasos

(Figure Presented) Chemical shifts of protons can report on metabolic transformations such as the conversion of choline to phosphocholine. To follow such processes in vivo, magnetization can be enhanced by dynamic nuclear polarization (DNP). We have hyperp ...

2009

Some methods of dynamic nuclear polarization for use in metabolic imaging

It has been suggested already more than 60 years ago to use polarized nuclei in particle scattering experiments1, but only with the discovery of the solid effect dynamic nuclear polarization process2 the realisation of polarized solid targets became possib ...

EPFL2009

Quantitative proton spectroscopic imaging of the neurochemical profile in rat brain with microliter resolution at ultra-short echo times

Rolf Gruetter, Giulio Gambarota

Proton spectroscopy allows the simultaneous quantification of a high number of metabolite concentrations termed the neurochemical profile. The spin echo full intensity acquired localization (SPECIAL) scheme with an echo time of 2.7 ms was used at 9.4T for ...

Wiley-Blackwell2008

Dose-dependent neuroprotective effect of ciliary neurotrophic factor delivered via tetracycline-regulated lentiviral vectors in the quinolinic acid rat model of Huntington's disease

Patrick Aebischer, Nicole Déglon

The ability to regulate gene expression constitutes a prerequisite for the development of gene therapy strategies aimed at the treatment of neurologic disorders. In the present work, we used tetracycline (Tet)-regulated lentiviral vectors to investigate th ...

2002

Combined effects of GDNF, BDNF, and CNTF on motoneuron differentiation in vitro

Patrick Aebischer, Laurence Winkel

We have previously shown that glial cell line-derived neurotrophic factor (GDNF), in addition to promoting the survival of dopaminergic neurons in cultures from embryonic rat ventral mesencephalon,also increases the activity of choline acetyltransferase (C ...

1996