Periodic Travelling Waves in Dimer Granular Chains

We study bifurcations of periodic travelling waves in granular dimer chains from the anti-continuum limit, when the mass ratio between the light and heavy beads is zero. We show that every limiting periodic wave is uniquely continued with respect to the mass ratio parameter and the periodic waves with the wavelength larger than a certain critical value are spectrally stable. Numerical computations are developed to study how this solution family is continued to the limit of equal mass ratio between the beads, where periodic travelling waves of granular monomer chains exist

ИССЛЕДОВАНИЕ ОСТЕОПЛАСТИЧЕСКИХ СВОЙСТВ РЕЗОРБИРУЕМОГО ПОЛИ-3-ГИДРОКСИБУТИРАТА IN VIVO НА МОДЕЛЯХ СЕГМЕНТАРНОЙ ОСТЕОТОМИИ

A family of materials  based  on biodegradable polymer-3-hydroxybutyric acid (polyhydroxybutyrate, PHB) has been  developed for the purposes of reparative osteogenesis. Osteoplastic properties of bulk implants  PHB and PHB composition with hydroxyapatite (HA) have been  investigated in comparison with branded drugs Bio-Oss ® in vivo via the model of segmental osteotomy. It is indicated that  reconstructive bone  formation is more  active when implants  with PHB as a main component are used.Для целей  репаративного остеогенеза разработано семейство материалов на основе биоразрушаемого полимера-3-гидроксимасляной кислоты (полигидроксибутирата, ПГБ). Остеопластические свойства  объемных имплантатов из ПГБ и композиции ПГБ с гидроксилапатитом (ГАП) исследованы in vivo на модели сегментарной остеотомии в сравнении с фирменным препаратом Bio-Oss®.  Показано, что реконструктивный остеогенез происходит более активно  при использовании имплантатов, содержащих в качестве основного компонента ПГБ.

THE RESEARCH OF OSTEOPLASTIC PROPERTIES OF RESORBABLE POLY-3-HYDROXYBUTYRATE IN vIvO ON MODELS OF SEGMENTAL OSTEOTOMY

A family of materials  based  on biodegradable polymer-3-hydroxybutyric acid (polyhydroxybutyrate, PHB) has been  developed for the purposes of reparative osteogenesis. Osteoplastic properties of bulk implants  PHB and PHB composition with hydroxyapatite (HA) have been  investigated in comparison with branded drugs Bio-Oss ® in vivo via the model of segmental osteotomy. It is indicated that  reconstructive bone  formation is more  active when implants  with PHB as a main component are used

Regulation of S100A8 Stability by RNF5 in Intestinal Epithelial Cells Determines Intestinal Inflammation and Severity of Colitis.

Inflammatory bowel disease (IBD) is prevalent, but the mechanisms underlying disease development remain elusive. We identify a role for the E3 ubiquitin ligase RNF5 in IBD. Intestinal epithelial cells (IECs) express a high level of RNF5, while the colon of Rnf5-/- mice exhibits activated dendritic cells and intrinsic inflammation. Rnf5-/- mice exhibit severe acute colitis following dextran sodium sulfate (DSS) treatment. S100A8 is identified as an RNF5 substrate, resulting in S100A8 ubiquitination and proteasomal-dependent degradation that is attenuated upon inflammatory stimuli. Loss of RNF5 from IECs leads to enhanced S100A8 secretion, which induces mucosal CD4+ T cells, resulting in Th1 pro-inflammatory responses. Administration of S100A8-neutralizing antibodies to DSS-treated Rnf5-/- mice attenuates acute colitis development and increases survival. An inverse correlation between RNF5 and S100A8 protein expression in IECs of IBD patients coincides with disease severity. Collectively, RNF5-mediated regulation of S100A8 stability in IECs is required for the maintenance of intestinal homeostasis

Breather solutions of the discrete p-Schrödinger equation

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Regulation of S100A8 Stability by RNF5 in Intestinal Epithelial Cells Determines Intestinal Inflammation and Severity of Colitis

Summary: Inflammatory bowel disease (IBD) is prevalent, but the mechanisms underlying disease development remain elusive. We identify a role for the E3 ubiquitin ligase RNF5 in IBD. Intestinal epithelial cells (IECs) express a high level of RNF5, while the colon of Rnf5−/− mice exhibits activated dendritic cells and intrinsic inflammation. Rnf5−/− mice exhibit severe acute colitis following dextran sodium sulfate (DSS) treatment. S100A8 is identified as an RNF5 substrate, resulting in S100A8 ubiquitination and proteasomal-dependent degradation that is attenuated upon inflammatory stimuli. Loss of RNF5 from IECs leads to enhanced S100A8 secretion, which induces mucosal CD4+ T cells, resulting in Th1 pro-inflammatory responses. Administration of S100A8-neutralizing antibodies to DSS-treated Rnf5−/− mice attenuates acute colitis development and increases survival. An inverse correlation between RNF5 and S100A8 protein expression in IECs of IBD patients coincides with disease severity. Collectively, RNF5-mediated regulation of S100A8 stability in IECs is required for the maintenance of intestinal homeostasis. : Fujita et al. show that RNF5 regulation of S100A8 stability in intestinal epithelial cells defines the degree of pro-inflammatory response, culminating in severe intestinal inflammation following DSS treatment to Rnf5−/− mice. Neutralizing S100A8 antibodies attenuates acute colitis phenotypes, and inverse RNF5/S100A8 expression coincides with clinical severity in IBD patients. Keywords: ubiquitin ligase, RNF5, S100A8, intestinal inflammation, IBD, acute colitis, intestinal epithelial cell