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991.
多沙唑嗪(DOX)存在一定心脏毒性作用,已非一线降压药物,但是作为治疗良性前列腺增生症合并下尿路症状(BPH/LUTS)的一线药物仍广泛应用于临床。同时,它可以轻度降低总胆固醇(TC)和甘油三脂(TG)水平。为减轻DOX心血管的不良反应,对其进行了手性拆分,发现DOX的分子中存在一个手性中心和一对光学异构体,即右旋多沙唑嗪((+)DOX)和左旋多沙唑嗪((-)DOX)。发现(-)DOX可能成为心血管不良反应较小的治疗BPH/LUTS药物。现就(±)DOX及其光学异构体对血脂代谢的作用的研究进展作一综述。 相似文献
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JS Swaney C Chapman LD Correa KJ Stebbins RA Bundey PC Prodanovich P Fagan CS Baccei AM Santini JH Hutchinson TJ Seiders TA Parr P Prasit JF Evans DS Lorrain 《British journal of pharmacology》2010,160(7):1699-1713
Background and purpose:
The aim of this study was to assess the potential of an antagonist selective for the lysophosphatidic acid receptor, LPA1, in treating lung fibrosis We evaluated the in vitro and in vivo pharmacological properties of the high affinity, selective, oral LPA1-antagonist (4′-{4-[(R)-1-(2-chloro-phenyl)-ethoxycarbonylamino]-3-methyl-isoxazol-5-yl}-biphenyl-4-yl)-acetic acid (AM966).Experimental approach:
The potency and selectivity of AM966 for LPA1 receptors was determined in vitro by calcium flux and cell chemotaxis assays using recombinant and native cell cultures. The in vivo efficacy of AM966 to reduce tissue injury, vascular leakage, inflammation and fibrosis was assessed at several time points in the mouse bleomycin model.Key results:
AM966 was a potent antagonist of LPA1 receptors, with selectivity for this receptor over the other LPA receptors. In vitro, AM966 inhibited LPA-stimulated intracellular calcium release (IC50 = 17 nM) from Chinese hamster ovary cells stably expressing human LPA1 receptors and inhibited LPA-induced chemotaxis (IC50 = 181 nM) of human IMR-90 lung fibroblasts expressing LPA1 receptors. AM966 demonstrated a good pharmacokinetic profile following oral dosing in mice. In the mouse, AM966 reduced lung injury, vascular leakage, inflammation and fibrosis at multiple time points following intratracheal bleomycin instillation. AM966 also decreased lactate dehydrogenase activity and tissue inhibitor of metalloproteinase-1, transforming growth factor β1, hyaluronan and matrix metalloproteinase-7, in bronchoalveolar lavage fluid.Conclusions and implications:
These findings demonstrate that AM966 is a potent, selective, orally bioavailable LPA1 receptor antagonist that may be beneficial in treating lung injury and fibrosis, as well as other diseases that are characterized by pathological inflammation, oedema and fibrosis. 相似文献994.
995.
Ko MS; Threat TA; Wang X; Horton JH; Cui Y; Wang X; Pryor E; Paris J; Wells- Smith J; Kitchen JR; Rowe LB; Eppig J; Satoh T; Brant L; Fujiwara H; Yotsumoto S; Nakashima H 《Human molecular genetics》1998,7(12):1967-1978
Mammalian embryos can only survive if they attach to the uterus
(implantation) and establish proper maternal-fetal interactions. To
understand this complex implantation pathway, we have initiated genomic
analysis with a systematic study of the cohort of genes expressed in
extraembryonic cells that are derived from the conceptus and play a major
role in this process. A total of 2103 cDNAs from the extraembryonic portion
of 7.5-day post-conception mouse embryos yielded 3186 expressed sequence
tags, approximately 40% of which were novel to the sequence databases.
Furthermore, when 155 of the cDNA clones with no homology to previously
detected genes were genetically mapped, apparent clustering of these
expressed genes was detected in subregions of chromosomes 2, 7, 9 and 17,
with 6.5% of the observed genes localized in the t-complex region of
chromosome 17, which represents only approximately 1.5% of the mouse
genome. In contrast, X-linked genes were under-represented.
Semi-quantitative RT-PCR analyses of the mapped genes demonstrated that one
third of the genes were expressed solely in extraembryonic tissue and an
additional one third of the genes were expressed predominantly in the
extraembryonic tissues. The over-representation of extraembryonic-expressed
genes in dosage- sensitive autosomal imprinted regions and
under-representation on the dosage-compensated X chromosome may reflect a
need for tight quantitative control of expression during development.
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A dedicated microbiology data processing system with remote batched job entry to an obsolete computer, has been superseded by the inclusion of bacteriology in an on-line interactive clinical pathology system which had previously incorporated chemical pathology and haematology. The original Phoenix system has been adapted to allow for the entry of bacteriology data using mnemonic codes and to deal with the problems caused by the longer processing time of bacteriology specimens. Particular advantages of the new system include the immediate linkage of all specimens for each patient and an easy recall and display of results in the laboratories and on the wards. 相似文献