Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Porcine shock model  (3)
  • Akute Encephaloenteritis  (1)
  • DNA-polymerase  (1)
  • 1
    ISSN: 1432-2307
    Keywords: Septic shock ; Skeletal muscle ; Porcine shock model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In domestic pigs, intermitted application ofEscherichia coli-endotoxin was used to create an animal model for a prolonged hypo- and hyperdynamic septic shock-like state and to investigate mechanisms of multiple organ failure. Here, we describe the changes in skeletal muscle after 18 h (2 animals) and 48 h (6 animals) of septic shock. Two pigs for each observation period that received physiologic saline solutions instead of endotoxin served as controls. The earliest lesions were endothelial cell damage with endomysial oedema and swelling of mitochondria in muscle fibres. With increasing degree of endothelial cell damage, pericytes showed degenerative changes with cytoplasmic fragmentation and karyolysis. After 48 h of shock, endomysial oedema was increased with fibrinogen present. Muscle fibre diameters were increased and swollen mitochondria and segmental necrosis of muscle fibres were frequently observed. However, phagocytic reaction or regenerative changes were not detected. In this respect, skeletal muscle lesions in septic shock differ from ischemic damage, which is characterized by early phagocytosis. Tumour necrosis factor alpha (TNFα) was increased greatly and significantly in the serum of the pigs that received endotoxin. The lesions described may be the result of both direct damage to muscle fibres by the endotoxin and/or the increased levels of TNFα and indirect damage because of the increased diffusion distance, due to the endomysial oedema. The loss of blood proteins into the endomysium may also play a role in generating hypoproteinemia in patients with septic shock.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-2307
    Keywords: Septic shock ; Skeletal muscle ; Porcine shock model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In domestic pigs, intermitted application of Escherichia coli-endotoxin was used to create an animal model for a prolonged hypo- and hyperdynamic septic shock-like state and to investigate mechanisms of multiple organ failure. Here, we describe the changes in skeletal muscle after 18 h (2 animals) and 48 h (6 animals) of septic shock. Two pigs for each observation period that received physiologic saline solutions instead of endotoxin served as controls. The earliest lesions were endothelial cell damage with endomysial oedema and swelling of mitochondria in muscle fibres. With increasing degree of endothelial cell damage, pericytes showed degenerative changes with cytoplasmic fragmentation and karyolysis. After 48 h of shock, endomysial oedema was increased with fibrinogen present. Muscle fibre diameters were increased and swollen mitochondria and segmental necrosis of muscle fibres were frequently observed. However, phagocytic reaction or regenerative changes were not detected. In this respect, skeletal muscle lesions in septic shock differ from ischemic damage, which is characterized by early phagocytosis. Tumour necrosis factor alpha (TNFα) was increased greatly and significantly in the serum of the pigs that received endotoxin. The lesions described may be the result of both direct damage to muscle fibres by the endotoxin and/or the increased levels of TNFα and indirect damage because of the increased diffusion distance, due to the endomysial oedema. The loss of blood proteins into the endomysium may also play a role in generating hypoproteinemia in patients with septic shock.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-2307
    Keywords: Cardiac muscle ; Microvasculature ; Septic shock ; Porcine shock model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The morphology of cardiac muscle was investigated in a porcine model of septic shock, created by intermitted application of Escherichia coli-endotoxin. The earliest lesions, found after 18 h of septic shock, were endothelial cell swelling, marked leucostasis and slight ischaemic alterations of the muscle fibres. At the end point of the experiments, after 48 h, some fibrin thrombi were found associated with more pronounced ischaemic alterations of cardiac muscle cells and some necrotic fibres. Comparing these findings with the severe endothelial and muscle fibre lesions found in skeletal muscle, the endothelial cells of the heart microvasculature, are clearly more resistant to the attack of the endotoxins and mediators liberated in septic shock.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 52 (1974), S. 939-940 
    ISSN: 1432-1440
    Keywords: Bromocarbamides ; Hypnotics ; Inhibition of cell proliferation ; DNA-polymerase ; L-cells ; Bromcarbamide ; Schlafmittel ; Hemmung der Zellteilung ; DNS-Polymerase ; L-Zellen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bromcarbamide stellen milde Einschlafmittel dar und sind derzeit in über 40 Spezialitäten, meist ohne Verschreibung am deutschen Markt erhältlich. Die große Zahl der Suizidc mit diesen Medikamenten hat das Interesse an der zellulären und molekularbiologischen Basis der Wirkung geweckt. Klinisch steht bei akuten Vergiftungsfällen ein interstitielles Lungenödem im Vordergrund. Es entsteht, wie tierexperimentell gezeigt wurde, durch vermehrte Pinocytose der pulmonalen Endothelien. In Gewebekulturfibroblasten kann diese Oberflächenaktivierung ebenfalls beobachtet werden. In der vorliegenden Arbeit wird ein weiterer Effekt von Bromcarbamid auf Gewebekulturfibroblasten beschrieben, der der Zellteilungshemmung. In Konzentrationen wie sie bei schweren Vergiftungsfällen des Menschen vorkommen können (125 µg/ml Serum) tritt eine Hemmung der Zellteilung infolge Hemmung der DNS-Synthese auf. Unter Bromcarbamid wirdeine Runde DNS synthetisiert und noch eine Zellteilung durchgemacht. Danach werden die Fibroblasten reversibel im Wachstumszyklus arretiert. Das entbromierte Bromcarbamid zeigt keinerlei hemmenden Effekt auf das Zellwachstum. Unter den Faktoren, die bei der DNS-Polymerisation beteiligt sind, ist die DNS-Polymerase durch Bromcarbamid in ihrer Aktivität gehemmt und zwar in einem Ausmaß, wie sie der zellulären DNS-Synthesehemmung und Proliferationshemmung entspricht. Bisher ist nicht klar, ob die früher beschriebenen Effekte an der Zelloberfläche mit der DNS-Synthesehemmung in kausalem Zusammenhang stehen oder ob Bromcarbamid direkt auf Funktion oder Synthese des DNS-Polymerasemoleküls wirkt.
    Notes: Summary Bromocarbamides are mild sleeping aides and lead to pulmonary edema and death due to respiratory failure when used in overdoses. Bromocarbamides increase pinocytosis and change the cell surface in pulmonary endothelial cells and fibroblasts. In this paper we describe another effect of Bromocarbamides. At concentrations comparable to those in the serum of intoxicated patients (100–125 µg/ml) a distinct proliferative inhibition is noted. Fibroblasts undergo stillone round of DNA-synthesis andone cell division and are then arrested reversibly in the cell cycle. Bromocarbamides inhibit mainly DNA-synthesis and to a much lesser extent RNA- and protein synthesis. Among the factors necessary for DNA polymerisation, DNA-polymerase activity is decreased corresponding to the effect of proliferative inhibition. It is not yet clear, whether Bromocarbamides inhibit DNA-polymerase activity by interacting with the cell surface or the nuclear envelope respectively or whether Bromocarbamides inactivate the DNA-polymerase molecule or its synthesis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 50 (1972), S. 76-85 
    ISSN: 1432-1440
    Keywords: Acute encephalo-enteritis ; toxic hyperpyretic gastro-enteritis ; consumption coagulopathy ; coagulopathy-haemorrhages ; tissue necroses of various organs ; fibrinous intravascular microthrombi ; therapy with streptokinase respectively heparin ; Akute Encephaloenteritis ; Verbrauchscoagulopathie ; Hämorrhagien ; Organnekrosen ; fibrinreiche intravasale Mikrothromben ; Therapie mit Streptokinase bzw. Heparin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bericht über einen 6 Monate alten Säugling mit dem typischen Bild einer akuten Encephaloenteritis (a.E.), der nicht nur die gerinnungsanalytischen Zeichen einer Verbrauchscoagulopathie aufwies, sondern auch die klinischen Folgen einer disseminierten intravasalen Gerinnungsstörung wie Schock, Hämorrhagien, Organnekrosen und Hämolyse zeigte. Zusätzlich werden die Erhebungen von 20 Kindern mit a.E., die in den Jahren 1964–1969 bei uns zur Aufnahme kamen, wiedergegeben. Dabei zeigt sich, daß die vorliegenden gerinnungsanalytischen Daten als Ausdruck einer Verbrauchscoagulopathie gewertet werden können. Darüber hinaus ergibt sich, daß bei allen daraufhin untersuchten Kindern [13] eine deutliche bis hochgradige Thrombozytopenie bestand, die meisten Kinder [17] eine hämorrhagische Diathese aufwiesen und 12 der 13 obduzierten Fälle fibrinreiche intravasale Mikrothromben in den Capillaren parenchymatöser Organe wie Milz, Leber, Lungen, Gehirn, Herzmuskulatur und Nieren hatten. Diese Ergebnisse sprechen insgesamt für eine intravasale Gerinnung mit nachfolgender Verbrauchscoagulopathie bei der a.E., die entweder ein häufig komplizierender Vorgang oder sogar ein notwendiger pathogenetischer Bestandteil der Erkrankung ist. Die Therapie hat diesen Gegebenheiten Rechnung zu tragen. Streptokinase zur Aktivierung der Fibrinolyse bzw. Heparin zum Stop der Verbrauchsreaktion erscheinen als Maßnahmen zur Senkung der bisher sehr hohen Letalität der a.E. angezeigt.
    Notes: Summary Report on a 6 months old infant with the typical symptoms of toxic hyperpyretic diarrhea (so-called acute encephalo-enteritis (a.E.)] who not only showed the laboratory signs of consumption coagulopathy but also the clinical signs and sequelae of disseminated intravascular coagulation like shock, haemorrhages, necroses of various tissues, and haemolysis. In addition to that the findings of 20 children admitted in 1964–1969 to our hospital, with the diagnosis of a.E. were retrospectively investigated. The data, referring to coagulation studies, could possibly be interpreted as signs of a consumption coagulopathy. Furthermore, it becomes evident that all children having had a platelet count done ([13] of [20]), showed a marked to serve thrombocytopenia; most of the children ([17 of [20]) had had a haemorrhagic diathesis and 12 of 13 autopsied cases showed fibrinous intravascular microthrombi in the capillaries of parenchymal organs such as spleen, liver, lungs, brain, cardiac muscle, and kidneys. The results altogether point to a disseminated intravascular coagulation with subsequent consumption coagulopathy which either is a frequent complication or even a necessary pathogenic part of the disease. The therapy has to consider these results. Streptokinase to activate the fibrinolysis respectively heparin to stop the consumption coagulopathy seem to be indicated as a trial to lower the still high lethality of a.E.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...