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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 29 (1977), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: γ-Glutamylation of p-tyramine, noradrenaline, dopamine and serotonin in rat brains was demonstrated by intraventricular injections of the radioactive amines and isolation of the γ-glutamylamines from the acidic extract of the rat brains. Formation of these γ-glutamylamines was proved to be catalysed by γ-glutamyltranspeptidase prepared from both rat kidney and brain. However, these compounds were degraded by γ-glutamylcyclotransferase of rat brain, but not by the emzyme of rat kidney.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 24 (1975), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: —Methods for the determination of methyl-lysine, methyllarginine and methylhistidine residues of tissue proteins are described. They consist of preliminary purification of basic amino acids, enzymic removal of lysine, arginine and histidine followed by amino acid analysis. Recovery rates and specificities of the method were satisfactory. The contents of methylamino acids in proteins of mammalian organs were determined.The distribution of proteins containing the methylamino acids in human brain showed that the concentrations of methyl-lysine and NG,N′G-dimethylarginine were highest in the gray matter of the cerebellar cortex and relatively high in regions rich in gray matter, while those of NG-mono- and NG,N′G-dimethylarginine were highest in the white matter. The following findings suggest that most of the NG-mono- and NG,N′G-dimethylarginine was associated with the myelin basic protein. The distribution of the methylarginine residues of acid-soluble proteins in bovine brains coincided with the cerebroside pattern. The concentrations of the amino acids in acid-soluble proteins of rat brain increased concomitantly with the increase of cerebroside. The methylamino acid content in proteins increased during the purification of the myelin basic protein from the white matter of human and bovine brains.Proteins containing NG,NG-dimethyiarginine and di- and trimethyl-lysine are concentrated in cell nuclei. The first amino acid was found mainly in nucleoplasmic proteins and the other two were found in histones. The concentration of 3-methylhistidine residue, highest in muscular proteins, is low in cerebral proteins and is probably derived from proteins of walls of blood vessels in the brain.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Neurosurgical review 4 (1981), S. 185-190 
    ISSN: 1437-2320
    Keywords: Blood flow ; Brain oedema ; Brain tumours ; Cats ; Corticosteroids ; EEG ; Hirndurchblutung ; Hirnödem ; Hirntumoren ; Katzen ; Kortikosteroide ; EEG
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei Katzen wurden experimentelle Hirntumoren durch stereotaktische Implantation von suspendierten Tumorzellen eines Rattengliomklon in die innere Kapsel hervorgerufen. Innerhalb von drei Wochen entwickelte sich am Implantationsort ein kugelförmiger Tumor mit einem Durchmesser von etwa 10 mm. Um den Tumor herum entstand ein ausgedehntes vasogenes Ödem, das sich in der weißen Substanz ausbreitete. Bei unbehandelten Tieren stieg der Wassergehalt im ödematösen Mark von 69.1 ± 0.9 auf 80.0 ± 0.8 ml/100 g Feuchtgewicht an, und die Durchblutung sank in diesem Gebiet von 32.2 ± 5.6 auf 18.9 ± 0.05 ml/100 g/min ab. Die einmalige intramuskuläre Injektion einer kristallinen Suspension von 10 mg/kg Dexamethason bewirkte innerhalb einer Woche eine signifikante Abnahme des Hirnödems. Der Wassergehalt sank auf 73.0 ± 0.5 ml/100 g Feuchtgewicht und die Durchblutung stieg über den Kontrollwert hinaus auf 35.7 ± 2.8 ml/100 g/min an. Die Veränderungen wurden von entsprechenden Elektrolytverschiebungen begleitet, korrelierten jedoch nicht mit EEG-Veränderungen, die mit der Fourier Frequenz-Analyse quantitativ ausgewertet wurden. Die Kortikosteroid-Behandlung verhinderte nicht die Extravasation von Peroxidase oder Evans Blau aus den Tumorgefäßen. Die therapeutische Wirkung wird deshalb auf eine Beschleunigung der Resorption oder eine Inhibition der Ausbreitung der Ödemflüssigkeit von dem Tumor in das peritumorale Hirngewebe zurückgeführt.
    Notes: Summary Experimental brain tumours were produced in cats by stereotactic implantation of 4 million suspended cells of a rat glioma clone into the internal capsule. Three weeks after implantation a spherical tumour developed with a diameter of up to 10 mm which was surrounded by vasogenic white matter oedema. In untreated animals water content in the peritumoural white matter increased from 69.1 ± 0.9 to 80.0 ± 0.8 ml/100 g w. w., and regional blood flow reciprocally decreased from 32.2. ± 5.6 to 18.9 ± 0.05 ml/100 g/min. A single injection of a crystalline suspension of 10 mg/kg dexamethasone given intramuscularly one week before the animals were killed, led to a significant amelioration of brain oedema. Peritumoural white matter water content decreased to 73.0 ± 0.5 ml/100 g w. w. and blood flow rose to 35.7 ± 2.8 ml/100 g/min. These changes were accompanied by parallel shifts of electrolyte content but they did not correlate with EEG activity, as assessed by Fourier frequency analysis. Corticosteroids did not prevent extravasation of peroxidase or Evans blue across the tumour vessels. The beneficial effect, therefore, is attributed to either an acceleration of resorption or an inhibition of the spread of oedema from the tumour into the peritumoural brain tissue.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0533
    Keywords: Nerve roots ; Amyotrophic lateral sclerosis ; X-linked recessive bulbospinal muscular atrophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Amyotrophic lateral sclerosis (ALS) and adult onset X-linked recessive bulbospinal muscular atrophy (SPMA), constituting the category of adult onset form of motor neuron disease, were analyzed on motor nerve roots. The results of morphometric analysis on ventral spinal roots (VSR) of all spinal segments from ALS and SPMA revealed the following three findings: (1) the large-myelinated α-motoneuron fibers were markedly decreased in number throughout all segments; (2) thin-myelinated autonomic preganglionic fibers were almost completely preserved; (3) small-intermediate-myelinated fibers which are considered to correspond to γ-motoneuron fibers were generally well preserved in ALS, but decreased by one-half to one-third in SPMA. However, all the components of the nerve roots of the oculomotor, trochlear, and abducent nerves were completely preserved in both ALS and SPMA. Moreover, the teasedfiber study showed that the regenerating-sprouting process rarely occurred in the VSR of ALS and SPMA. The present study suggested that the site of the primary lesion seems to be in the α-motoneuron fibers in motor neuron diseases, such as ALS or SPMA. However, the marked discrepancy in the pathologic change in the α-motoneuron fibers in the VSR and the nerve roots innervating the external ocular muscles was noteworthy.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0509
    Keywords: Key words: Liver MR—Liver neoplasms—Magnetic resonance (MR), rapid imaging—Magnetic resonance (MR), high-resolution imaging.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Purpose: To determine the utility of high-resolution MR imaging for hepatocellular carcinoma. Materials and methods: High-resolution MR images with a 512 matrix in a right to left frequency encoding direction were obtained in 20 consecutive patients with known or suspected hepatocellular carcinoma (HCC). Six series of breath-hold images of the entire liver [T1- and T2-weighted fast spin echo sequences, T1-weighted fast low-angle shot gradient echo sequence and three-phased contrast-enhanced dynamic study using the latter) were obtained using a phased-array multicoil. Results: HCC was depicted in 15 patients on the MR images, and the diagnosis was confirmed at pathology in 13 and at imaging in the other two. In the remaining five patients, HCC was correctly ruled out with MR imaging. Conclusion: High-resolution MR imaging is a promising method in the evaluation of HCC.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Abdominal imaging 23 (1998), S. 645-648 
    ISSN: 1432-0509
    Keywords: Key words: Aorta, abdominal—Aneurysm, infected—Early stage—Computed tomography.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We describe computed tomographic (CT) findings at the early stage of infected abdominal aortic aneurysm in three patients. Periaortic mass and increased fat density were the characteristic findings of early aortic infection on CT. Similar findings caused by other diseases may be difficult to differentiate by imaging alone, but these findings should be used to trigger close follow-up for patients with suspected infected abdominal aortic aneurysm.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0509
    Keywords: Key words: Liver, CT—Liver, magnetic resonance—Liver, caudate lobe—Caudate lobe, paracaval portion.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The computed tomographic (CT) and magnetic resonance appearance of pseudotumorous enlargement of the paracaval portion (PCP) of the caudate lobe of the liver are presented in two cirrhotic patients. The enlarged PCP was hyperattenuated on precontrast CT and hyperintense on T1-weighted images. The middle and right hepatic veins were displaced around the PCP. The presence of a portal vein branch penetrating the center of the enlarged PCP was important to distinguish it from other hepatic masses in the two patients.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 9 (1999), S. 457-459 
    ISSN: 1432-1084
    Keywords: Key words: Retroperitoneal neoplasms ; Retroperitoneal space ; Computed tomography ; Magnetic resonance imaging ; Ultrasonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We report a rare case of pseudomyxoma retroperitonei in a 58-year-old woman with a past history of severe appendicitis. The imaging showed a multicystic mass similar to pseudomyxoma peritonei, but the tumor was located in the retroperitoneal space.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1434-9949
    Keywords: Autoantibody ; Interstitial pulmonary fibrosis ; Polyarthritis ; Raynaud's phenomenon ; Transfer RNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Patient W.S. (a 61-year-old woman) and patient T.M. (a 41-year-old man) developed recurrent fevers, polyarthritis, Raynaud's phenomenon and interstitial pulmonary fibrosis without apparent polymyositis. From HeLa cell extracts, sera from both patients immunoprecipitated all species of intact and deproteinised tRNAs. To identify the antibody binding site more precisely, tRNAs transcribed in vitro from clonedEscherichia coli tRNA genes and various mutants were prepared and used as antigens for immunoprecipitation. When the TψC loop, or the D loop were deleted, such mutants were not bound by both sera, suggesting that the D and TψC loops were required for antibody binding. Abrogation of tRNA binding occurred when18G of tRNATrp was replaced with18A to break the tertiary L-shape structure of tRNA. These results strongly suggest that sera from W.S. and T.M. recognise the tertiary conformation of L-shaped tRNA which is constructed with both D and TψC loops. These autoantibodies may also serve as a marker for a new subset of patients with connective tissue diseases that is distinct from anti-aminoacyl-tRNA synthetase syndrome.
    Type of Medium: Electronic Resource
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