Orexins are neuropeptides that regulate the sleep-wake cycle and feeding behaviour. QRFP is a newly discovered neuropeptide which exerts similar orexigenic activity, thus playing an important role in energy homeostasis and regulation of appetite. The exact expression and signalling characteristics and physiological actions of QRFP and its receptor GPR103 are poorly understood. Alzheimer’s disease (AD) patients experience increased nocturnal activity, excessive daytime sleepiness, and weight loss. We hypothesised therefore that orexins and QRFP might be implicated in the pathophysiology of AD. We report that the down-regulation of hippocampal orexin receptors (OXRs) and GPR103 particularly in the cornu ammonis (CA) subfield from AD patients suffering from early onset familial AD (EOFAD) and late onset familial AD (LOAD). Using an in vitro model we demonstrate that this downregulation is due to to Aβ-plaque formation and tau hyper-phosphorylation. Transcriptomics revealed a neuroprotective role for both orexins and QRFP. Finally we provide conclusive evidence using BRET and FRET that OXRs and GPR103 form functional hetero-dimers to exert their effects involving activation of ERK1/2. Pharmacological intervention directed at the orexigenic system may prove to be an attractive avenue towards the discovery of novel therapeutics for diseases such as AD and improving neuroprotective signalling pathways.
Surfactant protein D (SP-D) is an important innate immune molecule that is involved in clearing pathogens and regulating inflammation at pulmonary as well as extra-pulmonary sites. Recent studies have established the role of SP-D as an innate immune surveillance molecule against lung and pancreatic cancer, but little is known about its involvement in signaling pathways it can potentially activate in ovarian cancer. We focused our study on ovarian cancer by performing bioinformatics analysis (Oncomine) of datasets and survival analysis (Kaplan-Meier plotter), followed by immunohistochemistry using ovarian cancer tissue microarrays. SP-D mRNA was found to be expressed widely in different types of ovarian cancer irrespective of stage or grade. These in silico data were further validated by immunohistochemistry of clinical tissues. High transcriptional levels of SP-D were associated with unfavorable prognosis (overall and progression-free survival). We also detected SP-D protein in Circulating Tumor Cells of three ovarian cancer patients, suggesting that SP-D can also be used as a potential biomarker. Previous studies have shown that a recombinant fragment of human SP-D (rfhSP-D) induced apoptosis in pancreatic cancer cells via Fas-mediated pathway. In this study, we report that treatment of SKOV3 cells (an ovarian cancer cell line) with rfhSP-D led to a decrease in cell motility and cell proliferation. This was followed by an inhibition of the mTOR pathway activity, increase in caspase 3 cleavage, and induction of pro-apoptotic genes Fas and TNF-α. These data, suggesting a likely protective role of rfhSP-D against ovarian cancer, together with the observation that the ovarian cancer microenvironment overexperesses SP-D leading to poor prognosis, seems to suggest that the tumor microenvironment components manipulate the protective effect of SP-D in vivo .
Pulmonary surfactant proteins SP-A and SP-D are pattern recognition innate immune molecules. However, there is extrapulmonary existence, especially in the amniotic fluid and at the feto-maternal interface. There is sufficient evidence to suggest that SP-A and SP-D are involved in the initiation of labour. This is of great importance given that preterm birth is associated with increased mortality and morbidity. In this study, we investigated the effects of recombinant forms of SP-A and SP-D (rhSP-A and rhSP-D, the comprising of trimeric lectin domain) on contractile events in vitro, using a human myometrial cell line (ULTR) as an experimental model. Treatment with rhSP-A or rhSP-D increased the cell velocity, distance travelled and displacement by ULTR cells. rhSP-A and rhSP-D also affected the contractile response of ULTRs when grown on collagen matrices showing reduced surface area. We investigated this effect further by measuring contractility-associated protein (CAP) genes. Treatment with rhSP-A and rhSP-D induced expression of oxytocin receptor (OXTR) and connexin 43 (CX43). In addition, rhSP-A and rhSP-D were able to induce secretion of GROα and IL-8. rhSP-D also induced the expression of IL-6 and IL-6 Ra. We provide evidence that SP-A and SP-D play a key role in modulating events prior to labour by reconditioning the human myometrium and in inducing CAP genes and pro-inflammatory cytokines thus shifting the uterus from a quiescent state to a contractile one.
Pregnancy-specific stress predicts birth outcomes. We hypothesized that there is a maternal stress-GR interaction that can influence fetal birth weight. This study examined the relationship between mothers' stress and attitude towards their pregnancies, placental glucocorticoid receptors (GRs) and growth arrest-specific transcript 5 (GAS5) expression, and the status of GR polymorphism, with their infants' birth weights. GAS5 and GRα were the predominant transcripts in both term and preterm placentas, with GAS5 being primarily localized in the syncytiotrophoblasts. In an attempt to mimic moderate and high stress environment in vitro, BeWo and JEG-3 cytotrophoblast cell lines were treated with 10 nM–1000 nM cortisol. Only expression of GAS5 was significantly upregulated by cortisol in all treatments compared with basal levels, but none of the GRs changed expression significantly. In an attempt to assess a stress versus gene interaction, we studied four GR polymorphisms. In the homozygous group for Tth111I polymorphism, mothers with negative attitudes towards the pregnancy gave birth to infants with significantly lower birth weights compared to women with positive/neutral attitudes. None of the GR splice variants were associated with maternal stress. However, placental GAS5 levels were inversely correlated with maternal stress. This study points towards a potential gene-environment interaction that could be of predictive value for fetal weight.
Brauchen wir sanktionsrechtliche Normen, damit Hate Crimes von der Strafjustiz angemessen beurteilt werden?Die Thematisierung der Hate Crimes-Problematik in einem Schwerpunktheft zum Sanktionenrecht darf keineswegs überraschen. Auch wenn es sich bei der sog. Hasskriminalität um eine bereichsspezifische Problematik handelt, die als kriminologische Kategorie international als durchgesetzt gelten kann, war es in der deutschen kriminalpolitischen Diskussion bisweilen nicht möglich, einen Konsens darüber zu erzielen, wie man diesem Phänomen am wirksamsten begegnen soll. Zur Debatte steht vor allem ein Reformbedürfnis des Strafzumessungsrechts, so dass der spezifische Unrechtsgehalt von Hassdelikten seinen Niederschlag in einer höheren Strafe finden würde. Gefordert wird somit eine Ergänzung der in § 46 Abs. 2 Satz 2 StGB konkretisierten Strafzumessungsfaktoren. Dieser Schritt könnte weitreichende Folgen haben, denn er würde den Weg zu einer stärkeren Verrechtlichung des Strafzumessungsrechts ebnen. Fraglich bleibt jedoch in diesem Zusammenhang, ob eine solche Vertiefung der Positivierung von Strafzumessungsfaktoren zu einer durchaus erwünschten Rationalisierung führt oder ob vielleicht strafrechtsdogmatische und kriminalpolitische Nach-und Nebenwirkungen zu befürchten sind. Gegenstand dieses Aufsatzes ist somit die Frage, ob zu einer angemessenen Beurteilung von Hate Crimes sondersanktionsrechtliche Normen erforderlich sind. Zunächst soll eine kurze Verknüpfung der Problematik der Hate Crimes mit allgemeinen kriminalpolitischen Trends erfolgen. Um überhaupt das Bedürfnis einer gesetzlichen Novellierung zu diskutieren, sollte die Phänomenologie der Hasskriminalität ebenso umrissen werden (unter I). Als Nächstes wird auf die Teilfrage eingegangen, ob Hate Crimes derartig besonders sind, dass sie vom Rechtsanwender unterschiedlich behandelt werden sollen. Vorrangig soll es hier unter Berücksichtigung strafzumessungsrechtlicher Gesichtspunkte um die oft apodiktische Behauptung eines erhöhten Unrechtsgehalts solcher Delikte gehen (unter II). Ein erhöhter Unrechtsgehalt spricht jedoch nicht zwangsläufig für eine Reformbedürftigkeit des bestehenden Strafzumessungsrechts: Entscheidend bleibt, ob die unrechtserhöhenden Umstände bereits de lege lata gebührend berücksichtigt werden (unter III). Diese Ausführungen werden schließlich mit einem Ausblick abgerundet (unter IV). Hate Crimes als Phänomen und kriminalpolitische Größe Hate Crimes -Warum jetzt? Es wäre irreführend zu behaupten, dass die kriminalpolitische Diskussion um die Hasskriminalität jungen Datums ist. Straftaten, die gegen Mitglieder von verschiedenen Gruppen nur aufgrund ihrer Gruppenzugehörigkeit verübt werden und durch Hass oder Vorurteile motiviert sind, stellen eine geschichtliche Kon-I.
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