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  • 1
    Electronic Resource
    Electronic Resource
    Intrastriatal sonic hedgehog injection increases Patched transcript levels in the adult rat subventricular zone (2002)
    Oxford, UK : Blackwell Science, Ltd
    European journal of neuroscience 16 (2002), S. 0 
    Details
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The morphogen sonic hedgehog (Shh) is implicated in neural tissue patterning and the growth of brain structures during embryogenesis and postnatal development and is also present in the adult brain. Shh signals through interaction with the tumour suppressor Patched (Ptc). This receptor for Shh is associated with Smoothened (Smo), a protein with high homology to the G-protein coupled receptors. However, little is known about the transduction mechanisms implicated in Shh signalling in the adult brain. The study described here shows that injection of aminoterminal myristoylated Shh (myrShhN) into the adult rat striatum robustly increases the levels of Ptc transcripts in selective brain areas including the subventricular zone (SVZ). The adult SVZ contains cell progenitors, which can proliferate and differentiate into new neurons and glia. In the myrShhN injected animals, proliferation and differentiation of these SVZ precursor cells were not affected as demonstrated by BrdU incorporation and immunohistochemistry performed with specific antibodies for nestin (uncommitted neural progenitors), PSA-NCAM (migrating neuroblasts) or GFAP (astrocytes). Together with the presence of Smo expressing cells and amino-terminal Shh (ShhN) protein in SVZ area of untreated animals, the data presented here supports the hypothesis that the Shh pathway may be activated in the adult brain, and that a niche for Shh signalling exists within the adult SVZ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9568.2002.02412.x
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of ethyl 8-fluoro-5,6-dihydro5- [^1^1C]methyl-6-oxo-4H-imidazo[1,5-a] [1,4]benzodiazepine-3-carboxylate (RO 15.1788-^1^1C): A specific radioligand for the in vivo study of central benzodiazepine receptors by positron emission tomography
    Amsterdam : Elsevier
    The @International Journal Of Applied Radiation And Isotopes 35 (1984), S. 973-976 
    Details
    ISSN: 0020-708X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-708X(84)90215-1
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  • 3
    Electronic Resource
    Electronic Resource
    Carbon 13 NMR study of glycogen metabolism in the baboon liver in vivo
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 182 (1992), S. 900-905 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0006-291X(92)91817-A
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  • 4
    Electronic Resource
    Electronic Resource
    In vivo benzodiazepine receptor occupancy by CL 218,872 visualized by positron emission tomography in the brain of the living baboon: modulation by GABAergic transmission and relation with anticonvulsant activity (1991)
    Springer
    Experimental brain research 83 (1991), S. 397-402 
    Details
    ISSN: 1432-1106
    Keywords: In vivo receptor study ; Benzodiazepine receptors, CL 218,872 ; Epilepsy ; Positron emission tomography ; Baboon Papio papio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In vivo benzodiazepine receptor occupancy by increasing doses of CL 218,872 has been evaluated in the baboon Papio papio, using (11C) RO 15-1788 as specific radioligand and positron emission tomography as external detection system. Although BZR heterogeneity has been previously demonstrated in the brain of the living baboon using PET, we did not observe in our studies that CL 218,872 interacts preferentially with one of the BZR subtypes. The monophasic pattern of the dose dependent CL 218,872 displacement curve and the corresponding “in vivo Hill coefficient” near unity suggest that CL 218,872 binds in cerebral baboon cortex with a similar affinity with BZ1 as well as BZ2 subtypes. The anticon-vulsant properties of CL 218,872 against bicuculline and allylglycine-induced seizures were correlated with benzodiazepine receptor occupancy by assessment of electroencephalographic activity during positron emission tomography studies. Our data confirmed in vivo the hypothesis of a partial agonist anticonvulsant activity of CL 218,872. At the same time, the use of a GABAantagonist (bicuculline) or an inhibitor of the GABA synthesis (allylglycine) suggested the existence of an allosteric interaction between benzodiazepine receptors and GABA receptors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00231164
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  • 5
    Electronic Resource
    Electronic Resource
    A primate model of Huntington's disease: cross-species implantation of striatal precursor cells to the excitotoxically lesioned baboon caudate-putamen (1989)
    Springer
    Experimental brain research 75 (1989), S. 213-220 
    Details
    ISSN: 1432-1106
    Keywords: Huntington's disease ; Excitotoxins ; Primates ; Caudate-putamen ; Neuronal transplantation ; Cross-species ; Fetal striatum ; Morphology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Ibotenic acid was injected unilaterally into the baboon caudate-putamen (CP) to achieve a neural degeneration model in the primate, with a neuropathology similar to Huntington's disease. Four to six weeks later injections of cell suspensions of striatal precursor cells, obtained by dissection of the fetal rat striatal region (13–15 days gestational age), were made into the excitotoxically lesioned CP of 3 baboons immunosuppressed by Cyclosporin A. Morphological analysis indicated that in one of the baboons, which had the largest lesion of the CP and the shortest survival time (6 weeks after implantation), there was a surviving striatal implant. The implanted neurons grew in high densities in cellular aggregates within the host gliotic CP. These neurons had a neuronal size phenotypical for rat striatum, i.e. on average about a 25% smaller neuronal cell diameter than a similar population in the baboon caudate-putamen. Glial-fibrillary-acid-protein immunoreactivity was present on large astrocytes within the striatal implant, with a distinct border towards the lesion-induced astrogliosis of the host. Neuronal markers for acetylcholinesterase and Leu-enkephalin were distributed in a typical patchy manner in the striatal implants along with fiber staining for tyrosine-hydroxylase-like immunoreactivity (TH) possibly derived from afferent host dopaminergic axons. Some of these fibers in the implants came from intrinsic TH-positive neuronal somata, probably of neocortical fetal origin and transiently expressing the enzyme. In conclusion, the results indicate that neuronal replacement can be achieved by crossspecies implantation of fetal striatal precursor cells to the previously neuron depleted primate CP under immunosuppression but that the survival and growth of such implants may be variable and subject to unfavourable trophic conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248544
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