198 research outputs found

    Number agreement, dependency length, and word order in Finnish traditional dialects

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    In this paper, we research the interaction of number agreement, dependency length, and word order between the subject and the verb in Finnish traditional dialects. While in standard Finnish the verb always agrees with the subject in person and number, in traditional dialects it does not always agree in number with a third person plural subject. We approach this variation with data from The Finnish Dialect Syntax Archive, focusing here on plural lexical subjects. We use generalized linear mixed effects modelling to model variation in number agreement and use as as a predictor the dependency length between the subject and the verb, building in word order as part of this measure. Variation across lemmas, individuals, and dialects is addressed via random grouping factors. Finite verb and the main lexical verb are considered as alternative reference points for dependency length and agreement. The results suggest that the probability of number agreement increases as the distance of the preverbal subject from the verb increases, but the trend is the opposite for postverbal subjects so that the probability of number agreement decreases as the distance of the subject from the verb increases.Peer reviewe

    NHC-catalyzed cleavage of vicinal diketones and triketones followed by insertion of enones and ynones

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    Thiazolium carbene-catalyzed reactions of 1,2-diketones and 1,2,3-triketones with enones and ynones have been investigated. The diketones gave α,β-double acylation products via unique Breslow intermediates isolable as acid salts, whereas the triketones formed stable adducts with the NHC instead of the coupling products

    Molecular characterization of the β chain of the murine interleukin 5 receptor

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    Interleukin 5 (IL-5) is a multifunctional cytokine that regulates the proliferation and differentiation of hematopoietlc cells Including B cells and eosinophlls. The murine IL-5 acts on target cells via an IL-5 specific high-affinity receptor (Kd ≃ 150 pM) that has been proposed to be composed of at least two membrane polypeptide chains. The p60 component recognized by anti-murine IL-5 receptor mAbs H7 and T21 binds IL-5 with low affinity (Kd ≃ 10 nM). The other component is p130, detectable by following cross-linking experiments with IL-5. Using H7, T21, and R52.120 mAbs specific to murine IL-5 receptor, we characterized the molecular nature of the p130 of the high affinity receptor for murine IL-5. R52.120 mAb did not recognize the IL-5 binding recombinant p60 expressed on COS7 cells, but reacted with p130/140 on IL-5-dependent cell lines. R52.120 mAb showed partial inhibition of the IL-5-induced proliferation of the IL-5-dependent early B cell line Y16 at high IL-5 concentrations. Addition of R52.120 mAb together with H7 or T21 mAb caused more striking inhibition of the IL-5-dependent proliferation than that caused by either of them alone. R52.120 mAb down-regulated the number and dissociation constant of IL-5 binding sites with high affinity without affecting the levels of these with low-affinity. It also preferentially inhibited the formation of the cross-linked complex of p130 with radlolabeledIL-5. These results Indicate that p130/p140, recognized by R52.120 mAb, Is indispensable, together with p60, for the formation of high affinity IL-5 receptor. We propose to designate p60 and p130/p140 as the α and β chain of IL-5 receptor, respectivel

    Migration, early axonogenesis, and Reelin-dependent layer-forming behavior of early/posterior-born Purkinje cells in the developing mouse lateral cerebellum

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    <p>Abstract</p> <p>Background</p> <p>Cerebellar corticogenesis begins with the assembly of Purkinje cells into the Purkinje plate (PP) by embryonic day 14.5 (E14.5) in mice. Although the dependence of PP formation on the secreted protein Reelin is well known and a prevailing model suggests that Purkinje cells migrate along the 'radial glial' fibers connecting the ventricular and pial surfaces, it is not clear how Purkinje cells behave in response to Reelin to initiate the PP. Furthermore, it is not known what nascent Purkinje cells look like <it>in vivo</it>. When and how Purkinje cells start axonogenesis must also be elucidated.</p> <p>Results</p> <p>We show that Purkinje cells generated on E10.5 in the posterior periventricular region of the lateral cerebellum migrate tangentially, after only transiently migrating radially, towards the anterior, exhibiting an elongated morphology consistent with axonogenesis at E12.5. After their somata reach the outer/dorsal region by E13.5, they change 'posture' by E14.5 through remodeling of non-axon (dendrite-like) processes and a switchback-like mode of somal movement towards a superficial Reelin-rich zone, while their axon-like fibers remain relatively deep, which demarcates the somata-packed portion as a plate. In <it>reeler </it>cerebella, the early born posterior lateral Purkinje cells are initially normal during migration with anteriorly extended axon-like fibers until E13.5, but then fail to form the PP due to lack of the posture-change step.</p> <p>Conclusions</p> <p>Previously unknown behaviors are revealed for a subset of Purkinje cells born early in the posteior lateral cerebellum: tangential migration; early axonogenesis; and Reelin-dependent reorientation initiating PP formation. This study provides a solid basis for further elucidation of Reelin's function and the mechanisms underlying the cerebellar corticogenesis, and will contribute to the understanding of how polarization of individual cells drives overall brain morphogenesis.</p

    Proteolytic Processing of Stat6 Signaling in Mast Cells as a Negative Regulatory Mechanism

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    Accumulating evidence has shown the importance of Stat6-mediated signaling in allergic diseases. In this study, we show a novel regulatory mechanism of Stat6-mediated signaling in mast cells. When Stat6 is activated by interleukin (IL)-4 and translocated to the nucleus, Stat6 is cleaved by a nucleus-associated protease in mast cells. The cleaved 65-kD Stat6 lacks the COOH-terminal transactivation domain and functions as a dominant-negative molecule to Stat6-mediated transcription. The retrovirus-mediated expression of cleavage-resistant Stat6 mutants prolongs the nuclear accumulation of Stat6 upon IL-4 stimulation and enhances IL-4–induced gene expression and growth inhibition in mast cells. These results indicate that the proteolytic processing of Stat6 functions as a lineage-specific negative regulator of Stat6-dependent signaling in mast cells, and thus suggest that it may account for the limited role of Stat6 in IL-4 signaling in mast cells

    Development of multi-layered sewer pipe plug — 3rd report: Tensile strength of protective sheet bonded by adhesive

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    Since the sewer system in Japan is becoming obsolete, it is, therefore necessary to reinforce or repair without stopping sewer functions by applying a suitable water stopping method. In this study, a multi-layered sewer pipe plug consisting of a protective sheet and inner and outer rubber balls is focused since it can be installed and removed at the construction site in a short time conveniently. Four types of adhesively bonded structures are investigated experimentally by changing bonding processes and adhesives. It is found that the main and base adhesive joint is the most suitable since the pressurized adhesive strength σB=60 MPa is 30% of the standard tensile strength of the protective sheet σB0=200 MPa

    No association between the sigma receptor type 1 gene and schizophrenia: results of analysis and meta-analysis of case-control studies

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    BACKGROUND: Several lines of evidence have supported possible roles of the sigma receptors in the etiology of schizophrenia and mechanisms of antipsychotic efficacy. An association study provided genetic evidence that the sigma receptor type 1 gene (SIGMAR1) was a possible susceptibility factor for schizophrenia, however, it was not replicated by a subsequent study. It is necessary to evaluate further the possibility that the SIGMAR1 gene is associated with susceptibility to schizophrenia. METHODS: A case-control association study between two polymorphisms of the SIGMAR1 gene, G-241T/C-240T and Gln2Pro, and schizophrenia in Japanese population, and meta-analysis including present and previous studies. RESULTS: There was no significant association of any allele or genotype of the polymorphisms with schizophrenia. Neither significant association was observed with hebephrenic or paranoid subtype of schizophrenia. Furthermore, a meta-analysis including the present and previous studies comprising 779 controls and 636 schizophrenics also revealed no significant association between the SIGMAR1 gene and schizophrenia. CONCLUSION: In view of this evidence, it is likely that the SIGMAR1 gene does not confer susceptibility to schizophrenia
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