Search results for "SOM"

Activités cytotoxiques et pro-oxydantes d'acides gras à très longue chaîne sur des oligodendrocytes murins sauvages et déficients en Abcd1 et Acox1 :…

2010

X-ALD and P-NALD are two rare, peroxisomal metabolic and neurodegenerative diseases. ABCD1 and ACOX1 are known to be responsible for X-ALD and P-NALD, respectively. The actively demyelinating lesions in CNS, exhibited signs of oxidative stress and cell death. The accumulation of VLCFA in plasma and tissue is the biochemical common hallmark to both diseases. First, we characterized a murine oligodendrocytes cell line 158N to use it as a model. This 158N cell line which has characteristics of mature oligodendrocytes (expression of myelin proteins MOG, MBP, PLP), has also functional peroxisomes with Abcd1 and Acox1 proteins. Then, we studied the cytotoxic and pro-oxidative effects of VLCFA (C2…

Comparative Cytogenetic Analysis of Three Stylommatophoran Slugs (Mollusca, Pulmonata)

2009

system is still controversial because phylogeny and systematic relationships at the family level are poorly understood. Besides morphological studies, ribosomal RNA genes and the H3/H4 histone gene cluster (Ambruster et al., 2005; Wade et al., 2006) have also been used to resolve the relationships within this order. Recently, by comparison of primary sequence of mitochondrial and nuclear genes, Grande et al. (2004) resolved the Stylommatophora as the early split monophyletic sister group of all the other gastropod taxa. Available data on the cytogenetics of Stylommatophora are extremely poor (reviewed by Patterson, 1969, and Thiriot-Quievreux, 2003) and mostly concern the haploid (n) and/ o…

ISomerization of xylene: MINDO/3 study of the cyclization of benzenium cation into bicyclo[3.1.0]hexenyl cation

1989

Abstract A MINDO/3 study of thermal electrocyclic closing of the benzenium cation to form a bicyclo[3.1.0]hexenyl cation is presented. The calculated mechanism discusses the possibility of cyclization of xylenium cations on a silica catalyst or in superacid media. The structure and energy of the transition state, the enthalpies of isomerization and barriers of activation were calculated for the following processes: isomerization of 2,6-dimethylbenzenium cation into 2,6-dimethylbicyclo[3.1.0]hexenyl cation, isomerization of 2,4-dimethylbenzenium cation into 2,4-dimethylbicyclo[3.1.0]-hexenyl cation, and isomerization of benzenium cation into bicyclo[3.1.0]-hexenyl cation. Equilibrium and kin…

P3‐039: Axonal neuritic pathology induces early presynaptic alterations in ps1/APP Alzheimer's mice hippocampus

2011

Loss of neurons in the hippocampus correlates with memory impairment in AD. Significant early reduction in the numerical density of hippocampal SOM interneurons was found in single (APPswe) and double (APPswe/ PS1dE9 and APPswe/TauP301S-G272V) transgenic models based on APP over expression and amyloid production. However, this inhibitory population was unaffected in age-matched single PS1 and tau transgenic mice as well as nontransgenic controls. Whereas SOM neuron loss in APPswe/PS1dE9 was associated to the onset of extracellular amyloid pathology in double APP/ tau mice this loss preceded plaque formation. Conclusions: As in human AD, somatostatin cell loss is a common early pathological …

254 GENERALIZED SOMATOSENSORY CHANGES IN PATIENTS WITH TEMPOROMANDIBULAR DISORDER

2007

Centrioles Shape ERK Signaling Outcomes to Support Lung Branching

2021

Centrioles comprise the heart of centrosomes, where they organize microtubules. To study the function of centrioles in development, we genetically disrupted centrioles throughout the mouse endoderm. Surprisingly, removing centrioles from endoderm did not disrupt intestinal growth or development. In contrast, in the lung, loss of centrioles blocked branching. In lung, loss of centrioles led to apoptosis specifically of SOX2-expressing airway epithelial cells. Loss of centrioles also activated p53. Deleting p53 in mice with acentriolar endoderm rescued SOX2+ cell survival, lung branching and viability. To investigate why endoderm-wide p53 activation specifically disrupted SOX2+ cell survival,…

Low-lying levels of201Hg from the decay of201Au

1972

The decay of 26.4-min201Au has been investigated using chemically separated sources and Ge(Li), Si(Li), plastic and Nal(Tl) detectors in different singles and coincidence arrangements. The β-disintegration energy was measured to be 1.27 ± 0.10 MeV. Thirteen γ-rays were observed to belong to this decay and the new levels at 543, 549.2, 552.8, 559.1, 605.7, 645.4, 732 and 1188 keV were established in201Hg, in addition to the three previously known excited states below 200 keV.

1984

Alkaline hydrolyses of anionic phenyl esters such as 4-acetoxy-3-nitrobenzoic acid and 4-butyryloxy-3-nitrobenzoic acid were examined in the presence of cationic and polymeric liposomes, liposomes of low molecular weight compounds, and micelles. All the additives accelerate the reaction due to the hydrophobic interaction between substrates and additives and the electrostatic interaction both between substrates and additives and between OH− and additives. In the Arrhenius plots of the reactions catalyzed by the liposomes, discontinuous regions were observed due to the phase transition of liposomes from the gel state to the liquid crystal state. Activation parameters ΔH≠, ΔS≠ and ΔV≠ for thes…

WWOX, a Chromosomal Fragile Site Gene and its Role in Cancer

2006

Allelic imbalances affecting the long arm of chromosome 16 have been extensively reported in the literature as common abnormalities observed in various carcinoma types, As a result of loss of heterozygosity (LOH) studies in breast cancer, we delimited a genomic area within chromosome 16 that demonstrated the highest frequency of abnormalities. This led us to the identification and cloning of WWOX, a candidate tumor suppressor gene (TSG) that spans a fragile region of DNA located at 16q23.3-24.1 (FRA16D: the second most active common chromosomal fragile site in the human genome). This gene encodes a protein that contains two WW domains responsible of protein-protein interactions and a short-…

Sleep–wake problems in patients with amyotrophic lateral sclerosis: implications for patient management

2012

SUMMARY Sleep–wake problems are frequent, although unrecognized, complications of amyotrophic lateral sclerosis (ALS). Sleep disorders such as insomnia, sleep-disordered breathing and restless legs syndrome have all been reported in patients with ALS, despite the limited number of studies and the small populations investigated so far. Sleep disturbances gradually worsen with disease progression, suggesting a relationship between the severity of disease and the neurodegenerative process. However, poor sleep can also be a consequence of several disturbances such as anxiety, depression, pain, choking, sialorrhea, fasciculations, cramps, nocturia and the inability to get comfortable and move f…