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  • Potent and Selective Triazole-Based Inhibitors of the Hypoxia-Inducible Factor Prolyl-Hydroxylases with Activity in the Murine Brain. 26147748

    As part of the cellular adaptation to limiting oxygen availability in animals, the expression of a large set of genes is activated by the upregulation of the hypoxia-inducible transcription factors (HIFs). Therapeutic activation of the natural human hypoxic response can be achieved by the inhibition of the hypoxia sensors for the HIF system, i.e. the HIF prolyl-hydroxylases (PHDs). Here, we report studies on tricyclic triazole-containing compounds as potent and selective PHD inhibitors which compete with the 2-oxoglutarate co-substrate. One compound (IOX4) induces HIFα in cells and in wildtype mice with marked induction in the brain tissue, revealing that it is useful for studies aimed at validating the upregulation of HIF for treatment of cerebral diseases including stroke.
    Tipo de documento:
    Referencia
    Referencia del producto:
    07-1585

  • Effect of CFMTI, an allosteric metabotropic glutamate receptor 1 antagonist with antipsychotic activity, on Fos expression in regions of the brain related to schizophreni ... 20399255

    The main purpose of this study was to explore the sites and mechanisms of action of metabotropic glutamate receptor 1 (mGluR1) blockade for antipsychotic-like activity using a Fos mapping approach, with the intent of better understanding the similarities and differences between the pharmacological actions of mGluR1 antagonists and atypical antipsychotic drugs such as clozapine. Previously, we showed that an allosteric mGluR1 antagonist (negative allosteric modulator), 2-cyclopropyl-5-[1-(2-fluoro-3-pyridinyl)-5-methyl-1H-1,2,3-triazol-4-yl]-2,3-dihydro-1H-isoindol-1-one (CFMTI), induces Fos expression in the nucleus accumbens and the medial prefrontal cortex (mPFC), but not in the dorsolateral striatum, similar to the action of clozapine. In the present study, the Fos expression profile of CFMTI was more extensively evaluated in various areas of the brain. CFMTI induced Fos expression mainly in glutamatergic neurons in the mPFC, in a manner similar to clozapine. A significant increase in Fos expression was also observed in the locous coeruleus, central amygdaloid nucleus, the bed nucleus of the stria terminalis and the primary somatosensory cortex, but not in the ventral tegmental area, dorsal raphe or lateral septum. Fos expression in orexin neurons in the lateral hypothalamic/perifornical area (LH/PFA) is known to be positively correlated with the weight gain liability of atypical antipsychotics. CFMTI did not increase Fos expression in orexin neurons in the LH/PFA, in contrast to clozapine, which does have weight gain liability. These results suggest that CFMTI has unique and shared actions on Fos expression in various regions of the brain compared with clozapine.
    Tipo de documento:
    Referencia
    Referencia del producto:
    MAB308
    Nombre del producto:
    Anti-Dopamine β Hydroxylase Antibody, clone 4F10.2
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