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Università della Svizzera italiana

Contribution of sleep disturbances to fatigue in multiple sclerosis : a prospective study using clinical and polysomnographic parameters

Riccitelli, Gianna C. ; Disanto, Giulio ; Sacco, Rosaria ; Sparasci, Davide ; Sacco, Leonardo ; Castelnovo, Anna ; Miano, Silvia ; Manconi, Mauro ; Gobbi, Claudio ; Zecca, Chiara

In: European journal of neurology, 2021, vol. 28, no. 9, p. 9

Background and purpose: Fatigue is amongst the most frequent and disabling symptoms of multiple sclerosis and a close relation between fatigue and sleep quality has been hypothesized. In this study the contribution of sleep disturbances measured by clinical and polysomnographic parameters to fatigue in multiple sclerosis was investigated. Methods: This was a prospective instrumental study...

Université de Fribourg

Distal and proximal hypoxia response elements cooperate to regulate organ-specific erythropoietin gene expression

Orlando, Ilaria M. C. ; Lafleur, Véronique N. ; Storti, Federica ; Spielmann, Patrick ; Crowther, Lisa ; Santambrogio, Sara ; Schödel, Johannes ; Hoogewijs, David ; Mole, David R. ; Wenger, Roland H.

In: Haematologica, 2019, vol. 105, no. 12, p. 2774–2784

While it is well-established that distal hypoxia response elements (HREs) regulate hypoxia-inducible factor (HIF) target genes such as erythropoietin (Epo), an interplay between multiple distal and proximal (promoter) HREs has not been described so far. Hepatic Epo expression is regulated by a HRE located downstream of the EPO gene, but this 3' HRE is dispensable for renal EPO gene...

Université de Fribourg

${\eta}$-paired superconducting hidden phase in photodoped Mott insulators

Li, Jiajun ; Golez, Denis ; Werner, Philipp ; Eckstein, Martin

In: Physical Review B, 2020, vol. 102, no. 16, p. 165136

We show that a metastable η-pairing superconducting phase can be induced by photodoping doublons and holes into a strongly repulsive fermionic Hubbard model. The doublon-hole condensate originates from an intrinsic doublon-hole exchange interaction and does not rely on the symmetry of the half-filled Hubbard model. It extends over a wide range of doublon densities and effective temperatures....

Université de Fribourg

Superconducting optical response of photodoped Mott insulators

Li, J. ; Golez, D. ; Werner, Philipp ; Eckstein, M.

In: Modern Physics Letters B, 2020, vol. 34, no. 19n20, p. 2040054

Ultrafast laser pulses can redistribute charges in Mott insulators on extremely short time scales, leading to the fast generation of photocarriers. It has recently been demonstrated that these photocarriers can form a novel η-paired condensate at low temperatures, featuring a staggered superconducting pairing field. In this conference paper, we discuss the origin of the η-paired hidden...

Université de Fribourg

Revealing Hund’s multiplets in Mott insulators under strong electric fields

Dasari, Nagamalleswararao ; Li, Jiajun ; Werner, Philipp ; Eckstein, Martin

In: Physical Review B, 2020, vol. 101, no. 16, p. 161107

We investigate the strong-field dynamics of a paramagnetic two-band Mott insulator using real-time dynamical mean-field theory. We demonstrate that strong electric fields can lead to a transient localization of electrons. This nonequilibrium quantum effect allows us to reveal specific signatures of local correlations in the time-resolved photoemission spectrum. In particular, we demonstrate...