367 research outputs found

    Bats and Wind Farms: The Role and Importance of the Baltic Sea Countries in the European Context of Power Transition and Biodiversity Conservation

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    Although labeled as environmentally friendly, wind power can have negative impacts on the environment, such as habitat destruction or wildlife fatalities. Considering the distribution and migratory characteristics of European bats, the negative effects of wind power should be addressed on an appropriate scale. This review summarizes the current state of knowledge on interactions between wind farms and bats in Europe, and compares it with the situation in the countries of the European boreal biogeographic region. We analyzed data from papers published in international and national scientific journals, focusing on studies conducted in Europe. The issue of the impacts wind power has on bats is clearly overlooked in most of the countries of the European boreal region, with low volumes of research available on the topic. This is probably due to fewer wind farms in the area, making this recent issue a less-prioritized topic. However, the Baltic Sea, and the countries surrounding it, are of extreme importance with regards to bat migration, especially for the Pipistrellus nathusii. Therefore, more research on wind power and bats is needed in this region, as well as more cooperation between all the stakeholders

    MHCII-independent CD4(+) T cells protect injured CNS neurons via IL-4

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    A body of experimental evidence suggests that T cells mediate neuroprotection following CNS injury; however, the antigen specificity of these T cells and how they mediate neuroprotection are unknown. Here, we have provided evidence that T cell-mediated neuroprotection after CNS injury can occur independently of major histocompatibility class II (MHCII) signaling to T cell receptors (TCRs). Using two murine models of CNS injury, we determined that damage-associated molecular mediators that originate from injured CNS tissue induce a population of neuroprotective, IL-4-producing T cells in an antigen-independent fashion. Compared with wild-type mice, IL-4-deficient animals had decreased functional recovery following CNS injury; however, transfer of CD4+ T cells from wild-type mice, but not from IL-4-deficient mice, enhanced neuronal survival. Using a culture-based system, we determined that T cell-derived IL-4 protects and induces recovery of injured neurons by activation of neuronal IL-4 receptors, which potentiated neurotrophin signaling via the AKT and MAPK pathways. Together, these findings demonstrate that damage-associated molecules from the injured CNS induce a neuroprotective T cell response that is independent of MHCII/TCR interactions and is MyD88 dependent. Moreover, our results indicate that IL-4 mediates neuroprotection and recovery of the injured CNS and suggest that strategies to enhance IL-4-producing CD4+ T cells have potential to attenuate axonal damage in the course of CNS injury in trauma, inflammation, or neurodegeneration

    A noncanonical role for the engulfment gene ELMO1 in neutrophils that promotes inflammatory arthritis

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    Rheumatoid arthritis is characterized by progressive joint inflammation and affects similar to 1% of the human population. We noted single-nucleotide polymorphisms (SNPs) in the apoptotic cell-engulfment genes ELMO1, DOCK2, and RAC1 linked to rheumatoid arthritis. As ELMO1 promotes cytoskeletal reorganization during engulfment, we hypothesized that ELMO1 loss would worsen inflammatory arthritis. Surprisingly, Elmo1-deficient mice showed reduced joint inflammation in acute and chronic arthritis models. Genetic and cell-biology studies revealed that ELMO1 associates with receptors linked to neutrophil function in arthritis and regulates activation and early neutrophil recruitment to the joints, without general inhibition of inflammatory responses. Further, neutrophils from the peripheral blood of human donors that carry the SNP in ELMO1 associated with arthritis display increased migratory capacity, whereas ELMO1 knockdown reduces human neutrophil migration to chemokines linked to arthritis. These data identify 'noncanonical' roles for ELMO1 as an important cytoplasmic regulator of specific neutrophil receptors and promoter of arthritis

    Up, close and personal: the new Front National visual strategy under Marine Le Pen

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    Extensive analyses of Marine Le Pen’s media interventions as leader of the French Front National have revealed mostly rhetorical differences from her father’s discourse. In particular, despite Marine Le Pen’s professed openness toward women and their policy concerns, and despite her professed intention to transform the FN into party suitable for government, there has been little progress in these directions. However, the FN’s visual discourse has been all but ignored by the scholarly analysis, despite the fact that campaign visuals encode significant social and political information. This paper finds that the FN candidates’ visual presentation has undergone major transformations from the 2007 to the 2012 legislative elections. Specifically FN candidates in 2012 are more likely to visually portray themselves like mainstream party candidates. Compared to the 2007 elections, women candidates, in particular, were more likely to visually promote their personal qualities in 2012, in some respects more than 2012 men candidates

    Genome wide analysis of gene expression changes in skin from patients with type 2 diabetes

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    Non-healing chronic ulcers are a serious complication of diabetes and are a major healthcare problem. While a host of treatments have been explored to heal or prevent these ulcers from forming, these treatments have not been found to be consistently effective in clinical trials. An understanding of the changes in gene expression in the skin of diabetic patients may provide insight into the processes and mechanisms that precede the formation of non-healing ulcers. In this study, we investigated genome wide changes in gene expression in skin between patients with type 2 diabetes and non-diabetic patients using next generation sequencing. We compared the gene expression in skin samples taken from 27 patients (13 with type 2 diabetes and 14 non-diabetic). This information may be useful in identifying the causal factors and potential therapeutic targets for the prevention and treatment of diabetic related diseases

    Modalités de recrutement des sujets dans la recherche en pédiatrie : étude prospective multicentrique

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    Contexte. - Une enquĂȘte qualitative exploratoire a montrĂ© que le nombre de patients Ă©ligibles et sollicitĂ©s dans les essais en pĂ©diatrie Ă©tait peu objectivĂ© ainsi que les refus. Objectif. - Estimer le nombre de refus de participation des familles dans les essais en pĂ©diatrie et lier le taux de refus aux caractĂ©ristiques protocole, investigateur et patients. MatĂ©riel et mĂ©thodes. - Étude prospective multicentrique inter-CIC (rĂ©seau pĂ©diatrique) d'une cohorte de protocoles. Pour chaque sollicitation Ă  participer, des fiches patient, investigateur et protocole Ă©taient remplies. RĂ©sultats. - L'Ă©tude a Ă©tĂ© rĂ©alisĂ©e de dĂ©cembre 2005 Ă  septembre 2007 sur quatre centres et a inclus 45 protocoles : 32 Ă  promotion industrielle, 36 multicentriques, 19 essais cliniques, 33 avec prises de sang et six avec examens invasifs, 26 avec des dĂ©placements spĂ©cifiques et 14 des hospitalisations supplĂ©mentaires. Sur ces protocoles, 170 investigateurs Ă©taient rĂ©fĂ©rencĂ©s comme recruteurs et 86 (51 %) ont rĂ©pondu au questionnaire : Ăąge mĂ©dian 42 ans, sex-ratio de 1, 13 sont investigateurs principal, 32 responsables pour le CIC et 50 investigateurs associĂ©s, 20 percevaient une rĂ©tribution versĂ©e au service dans 80 % des cas. La charge de travail mĂ©diane par investigateur Ă©tait d'une heure par inclusion et 67 (78 %) bĂ©nĂ©ficiaient d'une aide d'une TEC. Au total, 1022 sollicitations ont Ă©tĂ© rĂ©alisĂ©es sur 36 protocoles (neuf protocoles n'ayant eu aucune sollicitation) et 334 refus (33 %) ont Ă©tĂ© enregistrĂ©s soit une mĂ©diane de 12 % (Q1Q3 : 0-28 %) de refus par protocole. Parmi les 36 protocoles, 16 n'ont enregistrĂ© aucun refus, reprĂ©sentant 147 sollicitations et les 20 autres protocoles ont eu un taux moyen de 38 % de refus. L'analyse explicative est en cours. Conclusion. - Le taux de refus de 12 % n'est pas diffĂ©rent de celui des essais adultes et semble dĂ©pendant du type d'Ă©tude. L'absence de sollicitation concerne 20 % des Ă©tudes

    Slc20a2, Encoding the Phosphate Transporter PiT2, Is an Important Genetic Determinant of Bone Quality and Strength.

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    Osteoporosis is characterized by low bone mineral density (BMD) and fragility fracture and affects over 200 million people worldwide. Bone quality describes the material properties that contribute to strength independently of BMD, and its quantitative analysis is a major priority in osteoporosis research. Tissue mineralization is a fundamental process requiring calcium and phosphate transporters. Here we identify impaired bone quality and strength in Slc20a2-/- mice lacking the phosphate transporter SLC20A2. Juveniles had abnormal endochondral and intramembranous ossification, decreased mineral accrual, and short stature. Adults exhibited only small reductions in bone mass and mineralization but a profound impairment of bone strength. Bone quality was severely impaired in Slc20a2-/- mice: yield load (-2.3 SD), maximum load (-1.7 SD), and stiffness (-2.7 SD) were all below values predicted from their bone mineral content as determined in a cohort of 320 wild-type controls. These studies identify Slc20a2 as a physiological regulator of tissue mineralization and highlight its critical role in the determination of bone quality and strength. © 2019 The Authors. Journal of Bone and Mineral Research Published by Wiley Periodicals Inc

    Subcritical multiplicative chaos for regularized counting statistics from random matrix theory

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    For an N×N random unitary matrix U_N, we consider the random field defined by counting the number of eigenvalues of U_N in a mesoscopic arc of the unit circle, regularized at an N-dependent scale Ɛ_N>0. We prove that the renormalized exponential of this field converges as N → ∞ to a Gaussian multiplicative chaos measure in the whole subcritical phase. In addition, we show that the moments of the total mass converge to a Selberg-like integral and by taking a further limit as the size of the arc diverges, we establish part of the conjectures in [55]. By an analogous construction, we prove that the multiplicative chaos measure coming from the sine process has the same distribution, which strongly suggests that this limiting object should be universal. The proofs are based on the asymptotic analysis of certain Toeplitz or Fredholm determinants using the Borodin-Okounkov formula or a Riemann-Hilbert problem for integrable operators. Our approach to the LÂč-phase is based on a generalization of the construction in Berestycki [5] to random fields which are only asymptotically Gaussian. In particular, our method could have applications to other random fields coming from either random matrix theory or a different context

    Molecular Targets for 17α-Ethynyl-5-Androstene-3ÎČ,7ÎČ,17ÎČ-Triol, an Anti-Inflammatory Agent Derived from the Human Metabolome

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    HE3286, 17α-ethynyl-5-androstene-3ÎČ, 7ÎČ, 17ÎČ-triol, is a novel synthetic compound related to the endogenous sterol 5-androstene-3ÎČ, 7ÎČ, 17ÎČ-triol (ÎČ-AET), a metabolite of the abundant adrenal steroid dehydroepiandrosterone (DHEA). HE3286 has shown efficacy in clinical studies in impaired glucose tolerance and type 2 diabetes, and in vivo models of types 1 and 2 diabetes, autoimmunity, and inflammation. Proteomic analysis of solid-phase HE3286-bound bead affinity experiments, using extracts from RAW 264.7 mouse macrophage cells, identified 26 binding partners. Network analysis revealed associations of these HE3286 target proteins with nodes in the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways for type 2 diabetes, insulin, adipokine, and adipocyte signaling. Binding partners included low density lipoprotein receptor-related protein (Lrp1), an endocytic receptor; mitogen activated protein kinases 1 and 3 (Mapk1, Mapk3), protein kinases involved in inflammation signaling pathways; ribosomal protein S6 kinase alpha-3 (Rsp6ka3), an intracellular regulatory protein; sirtuin-2 (Sirt2); and 17ÎČ-hydroxysteroid dehydrogenase 1 (Hsd17ÎČ4), a sterol metabolizing enzyme
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