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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 881 (1986), S. 281-291 
    ISSN: 0304-4165
    Keywords: (Rat pancreas) ; Digestion ; Enzyme secretion ; Zymogen granule
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1084
    Keywords: Key words: Gaucher's disease type I – Skeletal disease – Bone marrow imaging – MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Gaucher's disease type I is the most prevalent lysosomal storage disorder caused by an autosomal-recessive inherited deficiency of glucocerebrosidase activity with secondary accumulation of glucocerebrosides within the lysosomes of macrophages. The storage disorder produces a multisystem disease characterized by progressive visceral enlargement and gradual replacement of bone marrow with lipid-laden macrophages. Skeletal disease is a major source of disability in Gaucher's disease. Extraosseous extension of Gaucher cells is an extremely rare manifestation of skeletal Gaucher's disease. This is a report on the MRI and histopathological findings of an extraosseous Gaucher-cell extension into the midface in a patient with Gaucher's disease.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1440
    Keywords: Acute pancreatitis ; Chronic pancreatitis ; Free radicals ; Antioxidants ; Lipid peroxidation ; Vitamins ; P450 system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The present work reviews the evidence for an involvement of free radicals in the pathophysiology of chronic pancreatitis and the potential of treatment with antioxidant and scavenger substances. Preliminary results indicate that exposure of isolated pancreatic acinar cells to a reaction mixture containing hypoxanthine, xanthine oxidase, and chelated iron causes cell damage and death probably due to generation of superoxide anion and hydrogen peroxide. It still needs to be analyzed which scavengers and antioxidants are able to ameliorate the damage due to oxidant stress in cell models. Such knowledge from cellular studies might help to plan therapeutical trials to evaluate potentially effective antioxidants and scavengers in the experimental animal and in patients with pancreatitis. As yet there are no published studies about the role of free radicals in animal models of chronic pancreatitis. This fact is probably due to the shortcomings of the animal models available. Recent studies presented evidence that activation of oxygen-derived free radicals occurs in patients with chronic pancreatitis. There is also some evidence that the dietary intake of antioxidants may be reduced in patients with chronic pancreatitis. It was suggested that such reduction of antioxidant defenses in the face of an increased demand due to heightened induction of P450 activities may facilitate lipid peroxidation. However, as yet, there is no direct evidence that a reduction of dietary antioxidants with a simultaneous increase in P450 activity is the primary mechanism which initiates chronic pancreatitis without contribution of other factors. Many of the findings in patients with chronic pancreatitis (increase in P450 activity, increase in hepatic lipid peroxidation, decrease in dietary intake of antioxidants) may be the sequelae and not the cause of chronic pancreatitis. Only controlled clinical trials will determine whether supplements of antioxidants can alter the clinical course of chronic pancreatitis.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 232 (1981), S. 426-427 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0428
    Keywords: Hyperinsulinaemia ; insulin resistance ; insulin degradation ; haemochromatosis ; cirrhosis ; insulin ; glucagon ; C-peptide ; gastric inhibitory polypeptide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This study investigated early alterations of glucose metabolism in idiopathic haemochromatosis. Circulating concentrations of glucose, insulin, C-peptide, glucagon, and gastric inhibitory polypeptide (GIF) were measured after a 100-g oral glucose load in 10 men with idiopathic haemochromatosis in the non-cirrhotic stage of the disease. All had normal glucose tolerance and normal body weight. Ten matched healthy subjects were studied as controls. Insulin concentrations increased to significantly higher levels in patients with idiopathic haemochromatosis than in the control subjects from 30 to 180min after the glucose load (p〈0.01), while fasting insulin concentrations were not significantly different (p〉 0.05). Concentrations of glucose, glucagon, C-peptide, and GIF were not significantly different at any time (p〉 0.05). Thus, patients with idiopathic haemochromatosis show hyperinsulinaemia and hence insulin resistance without impaired glucose tolerance in the non-cirrhotic stage. Since pancreatic insulin secretion (C-peptide), glucagon secretion, and the entero-insulinar axis (GIP) are not impaired in these non-cirrhotic patients with idiopathic haemochromatosis, iron accumulation in the hepatocytes may be responsible for the impaired insulin effect and may cause impaired hepatic insulin extraction.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-2161
    Keywords: Key words Gaucher disease ; Bone disease ; Extraosseous Gaucher disease ; Bone marrow imaging ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To investigate the frequency and morphology of extraosseous extension in patients with Gaucher disease type I. Design and patients. MRI examinations of the lower extremities were analyzed in 70 patients with Gaucher disease type I. Additionally, the thoracic spine and the midface were investigated on MRI in two patients. Results. Four cases are presented in which patients with Gaucher disease type I and severe skeletal involvement developed destruction or protrusion of the cortex with extraosseous extension into soft tissues. In one patient, Gaucher cell deposits destroyed the cortex of the mandible and extended into the masseter muscle. In the second patient, multiple paravertebral masses with localized destruction of the cortex were apparent in the thoracic spine. In the third and fourth patient, cortical destruction with extraosseous tissue extending into soft tissues was seen in the lower limbs. Conclusions. Extraosseous extension is a rare manifestation of Gaucher bone disease. While an increased risk of cancer, especially hematopoietic in origin, is known in patients with Gaucher disease, these extraosseous benign manifestations that may mimic malignant processes should be considered in the differential diagnosis of extraosseous extension into soft tissues. A narrow neck of tissue was apparent in all cases connecting bone and extraosseous extensions.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1435-2451
    Keywords: Chronic pancreatitis ; Surgery ; Resection ; Drainage ; Beta cell function
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die chronische Pankreatitis (CP) führt durch Organdestruktion auch zu einer verminderten endokrinen Pankreasfunktion. Gegenstand der vorliegenden Untersuchung war die Frage, inwieweit die operative Therapie einer CP durch Parenchymresektion oder lediglich Pankreasgangdrainage einen direkten Einfluβ auf die \-Zellfunktion hat. Bei jeweils n = 10 Patienten mit Resektion oder Drainageeingriff wurde prä-, post- sowie teilweise 3 Monate postoperativ ein intravenöser Glukosetoleranztest (IVGTT) durchgeführt. Drei resezierte Tumorpatienten dienten als orientierender Vergleich. Bestimmt wurden Glukoseverwertungsgeschwindigkeit, Insulinantwort and C-Peptidsynthese. Die Glukoseverwertungsgeschwindigkeit (K-Wert) war bei Patienten mit CP weder nach Resektion (1,93 ± 0,78/2,13 ± 0,72; p = n.s.) noch nach Drainage (1,26 ± 0,47/1,54 ± 0,58; p = n.s.) signifikant unterschiedlich, im Gegensatz zur Verschlechterung bei allen 3 resezierten Tumorpatienten (2,23 ± 0,55/1,23 ± 0,43). Auch die initiale Insulinantwort [9U/ml] war weder durch Resektion (19,7 ± 17,3/16,0 ± 18,2; p = n.s.) noch durch Drainage (16,7 ± 16,5/13,0 ± 9,0; p = n.s.) wesentlich beeinträchtigt, bei allen 3 Tumorpatienten jedoch verschlechtert (42,9 ± 15,7/17,5 ± 3,8). Eine vergleichbare Konstellation ergab sich bei der stimulierten C-Peptidsynthese [ngmin/ml] fur resezierte (90,5 ± 85,6/73,8 ± 48,9; p = n.s.) and drainierte (121,3 ± 67,5/98,0 ± 57,2; p = n.s.) CP-bzw. für resezierte Tumorpatienten (157,8 ± 66,9/125,1 ± 69,6). In der chirurgischen Behandlung der chronischen Pankreatitis führt eine Resektion nicht automatisch zum \-Zellfunktionsverlust. Die Parenchymerhaltung bei Gangdrainageoperationen hat in diesem Zusammenhang keinen nachweisbaren Vorteil. Die Verfahrenswahl wird deshalb individuell von der konkreten Indikation, der Organmorphologie und den erwünschten Langzeitergebnissen der Operationstechnik beeinflußt.
    Notes: Abstract Chronic pancreatitis (CP) leads to deterioration of the endocrine pancreatic function by fibrotic destruction. The aim of the present study was to investigate whether resection or duct drainage in patients with CP would have a direct impact on the pancreatic beta cell function. An intravenous glucose tolerance test (IVGTT) was performed before, after and in some cases 3 months after operation in ten patients each of whom had been treated by either resection or duct drainage. Three patients undergoing pancreatic resection for cancer served as controls. Beta cell function was assessed by glucose elimination (K-values), insulin and C-peptide response. K-Values in patients with CP were not significantly influenced after resection (1.93 ± 0.78/2.13 ± 0.72; n.s.) or drainage (1.26 ± 0.47/1.54 ± 0.58; n.s.) but reduced in all three tumor patients (2.23 ± 0.55/1.23 ± 0.43). The initial insulin response [μU/ml] in CP patients was also not altered after resection (19.7 ± 17.3/16.0 ± 18.2; n.s.) or after drainage (16.7 ± 16.5/13.0 ± 9.0; n.s.), whereas all three resected tumor patients showed reduced values (42.9 ± 15.7/17.5 ± 3.8). Stimulated C-peptide synthesis [ngmin/ml] was not substantially lowered in patients resected for CP (90.5 ± 85.6/73.8 ± 48.9; n.s.) or in the drainage group (121.3 ± 67.5/98.0 ± 57.2; n.s.), but this parameter was decreased in every tumor patient postoperatively (157.8 ± 66.9/125.1 ± 69.6). Resection in patients with chronic pancreatitis did not inevitably result in loss of beta cell function. Parenchyma-preserving drainage procedures had no measurable advantage in this respect. Therefore, the technique must be individually chosen in surgical therapy of chronic pancreatitis, depending on intention of treatment, appropriate organ morphology, and the long-term success rate of the procedure.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 344 (1992), S. 549-553 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A method for the determination of theophylline in human serum by the isotope dilution/mass spectrometric technique is described. As an internal standard labelled (1,3-15N2-2-13C)theophylline is added to the serum sample. The analyte and internal standard are extracted with chloroform/2-propanol (90:10) and converted to the trimethylsilyl derivatives. The extraction and silylation procedures are checked by adding theophylline and internal standard in various concentrations to blank serum and determining the recovery. The trimethylsilyl derivatives of labelled and non-labelled theophylline are separated and detected by GC-MS with the mass spectrometer set to m/z 252 and 255. The amounts of theophylline in the serum are calculated from the isotope ratios measured by selected ion monitoring. The accuracy, precision and recovery of this GC-MS method are presented and discussed. The coefficient of variation determined from duplicate samples was less than 2.5%. The detection limit was 10 ng/ml at a signal-to-noise ratio of 3:1.
    Type of Medium: Electronic Resource
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