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Université de Fribourg

DeltaRpkm: an R package for a rapid detection of differential gene presence between related bacterial genomes

Akarsu, Hatice ; Aguilar-Bultet, Lisandra ; Falquet, Laurent

In: BMC Bioinformatics, 2019, vol. 20, no. 1, p. 621

Comparative genomics has seen the development of many software performing the clustering, polymorphism and gene content analysis of genomes at different phylogenetic levels (isolates, species). These tools rely on de novo assembly and/or multiple alignments that can be computationally intensive for large datasets. With a large number of similar genomes in particular, e.g., in surveillance and...

Université de Fribourg

Cooccurrence of NDM-1, ESBL, RmtC, AAC(6′)-Ib, and QnrB in Clonally Related Klebsiella pneumoniae Isolates Together with Coexistence of CMY-4 and AAC(6′)-Ib in Enterobacter cloacae Isolates from Saudi Arabia

Al-Agamy, Mohamed H. ; El-Mahdy, Taghrid S. ; Radwan, Hesham H. ; Poirel, Laurent

In: BioMed Research International, 2019, p. -

The aim of this study was to investigate the mechanisms responsible for resistance to antimicrobials in a collection of enterobacterial isolates recovered from two hospitals in Saudi Arabia. A total of six strains isolated from different patients showing high resistance to carbapenems was recovered in 2015 from two different hospitals, with four being Klebsiella pneumoniae and two...

Université de Fribourg

The calcium-binding protein parvalbumin modulates the firing 1 properties of the reticular thalamic nucleus bursting neurons

Albéri, Lavinia ; Lintas, Alessandra ; Kretz, Robert ; Schwaller, Beat ; Villa, Alessandro E. P.

In: Journal of Neurophysiology, 2013, vol. 109, no. 11, p. 2827–2841

The reticular thalamic nucleus (RTN) of the mouse is characterized by an overwhelming majority of GABAergic neurons receiving afferences from both the thalamus and the cerebral cortex and sending projections mainly on thalamocortical neurons. The RTN neurons express high levels of the “slow Ca²⁺ buffer” parvalbumin (PV) and are characterized by low-threshold Ca²⁺ currents,...

Université de Fribourg

Notch signaling in the brain: In good and bad times

Alberi, Lavinia ; Hoey, Sarah ; Brai, Emanuele ; Scotti, Alessandra ; Marathe, Swananda

In: Ageing Research Reviews, 2013, p. -

Notch signaling is an evolutionarily conserved pathway, which is fundamental for neuronal development and specification. In the last decade, increasing evidence has pointed out an important role of this pathway beyond embryonic development, indicating that Notch also displays a critical function in the mature brain of vertebrates and invertebrates. This pathway appears to be involved in neural...

Université de Fribourg

Neonatal stroke in mice causes long-term changes in neuronal notch-2 expression that may contribute to prolonged injury

Albéri, Lavinia ; Chi, Zhikai ; Kadam, Shilpa D. ; Mulholland, Justin D. ; Dawson, Valina L. ; Gaiano, Nicholas ; Comi, Anne M.

In: Stroke, 2010, vol. 41, no. Suppl. 1, p. S64-S71

Background and Purpose: Notch receptors (1–4) are membrane proteins that, on ligand stilumation, release their cytoplasmic domains to serve as transcription factors. Notch-2 promotes proliferation both during development and cancer, but its role in response to ischemic injury is less well understood. The purpose of this study was to understand whether Notch-2 is induced after neonatal stroke...

Université de Fribourg

Non-typhoidal Salmonella blood stream infection in Kuwait: Clinical and microbiological characteristics

Albert, M. John ; Bulach, Dieter ; Alfouzan, Wadha ; Izumiya, Hidemasa ; Carter, Glen ; Alobaid, Khaled ; Alatar, Fatemah ; Sheikh, Abdul Rashid ; Poirel, Laurent

In: PLOS Neglected Tropical Diseases, 2019, vol. 13, no. 4, p. e0007293

Salmonella organisms are classified into typhoidal Salmonella (causing enteric fever) and non-typhoidal Salmonella (NTS) (causing infections other than enteric fever). Apart from causing other infections, NTS causes blood-stream infection (bacteremia and septicemia). NTS blood stream infection (NTS-BI) is considered to be an emerging and neglected tropical disease in Africa. It causes a very...

Université de Fribourg

Per2 has time on its side

Albrecht, Urs

In: Nature Chemical Biology, 2007, vol. 3, p. 139 - 140

The circadian clock runs with a period of about 24 h and therefore allows mammals to predict sunrise at the cellular level. Phosphorylation of the clock protein period 2 influences this process by varying the clock’s period length.

Université de Fribourg

Orchestration of gene expression and physiology by the circadian clock

Albrecht, Urs

In: Journal of Physiology-Paris, 2006, vol. 100, no. 5-6, p. 243-251

In mammals, the master circadian clock that drives many biochemical, physiological and behavioral rhythms is located in the suprachiasmatic nuclei (SCN) of the hypothalamus. Generation and maintenance of circadian rhythms rely on complex interlaced feedback loops based on transcriptional and posttranscriptional events involving clock genes and kinases. This clock serves the purpose to organize an...

Université de Fribourg

The circadian clock, reward, and memory

Albrecht, Urs

In: Frontiers in Molecular Neuroscience, 2011, vol. 4, no. 41, p. -

During our daily activities, we experience variations in our cognitive performance, which is often accompanied by cravings for small rewards, such as consuming coffee or chocolate. This indicates that the time of day, cognitive performance, and reward may be related to one another. This review will summarize data that describe the influence of the circadian clock on addiction and mood-related...