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  • 1
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Science Ltd
    Histopathology 40 (2002), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Multifocal distribution of pulmonary capillary haemangiomatosis Aims: We investigated a case of pulmonary capillary haemangiomatosis, a rare condition, to determine the extent of the pathological changes within the lungs. Systematic histological sampling has not previously been performed in this condition. Methods and results: A 52-year-old woman with a history of ischaemic cardiomyopathy suffered from repeated respiratory infections, which were attributed to chronic pulmonary congestion. She died suddenly of fulminant pulmonary thrombembolism. An autopsy was performed and lung tissue was sampled at multiple sites. Beside passive congestion, the lungs showed well-circumscribed areas containing proliferations of small capillaries infiltrating the pulmonary septa and the walls of otherwise normal blood vessels and bronchi. The most severely affected areas were found to be in the periphery of both lower lobes. A diagnosis of pulmonary capillary haemangiomatosis was made. Conclusions: This is the first case of pulmonary capillary haemangiomatosis in which systematic histological sampling has been performed. Mapping of lesions disclosed the multifocal distribution of pulmonary capillary haemangiomatosis in this patient.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Steroid Biochemistry 27 (1987), S. 825-828 
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2307
    Keywords: Key words Atherosclerosis ; Pathology ; WHHL rabbits ; Pravastatin ; Probucol ; Morphometric analysis ; Survival
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  This study was aimed at determining the effects of a combined pravastatin and probucol regimen on survival and vascular pathology of heterozygous Wa- tanabe heritable hyperlipidaemic (WHHL) rabbits fed a low-cholesterol (0.03%)-enriched diet. Pravastatin monotherapy preceded the combined treatment. In animals receiving pravastatin and the enriched diet (verum group; n = 6), mean total serum cholesterol levels were consistently lowered at a dosage of 5 mg/kg pravastatin and with the combined treatment. Survival was increased (median 45 vs 25 months), while coronary atherosclerosis was less obstructive and altered to a more fibrous type than in controls (n = 8). The extent of aortic lesions, as determined by the relative plaque volume, was not related to survival in either group. However, aortic plaque types in verum group animals revealed less severe stages with a different composition and architecture, with a lower relative content of macrophage-derived foam cells and necrosis and a higher relative content of extracellular matrix. There was also a thicker fibrous cap than in control animals of similar age. Our data reveal a beneficial effect on survival of heterozygous WHHL rabbits when lipid-lowering and antioxidative treatment are combined. This appears to be due both to reduced coronary atherosclerosis and to a different, more stable type of atherosclerotic disease in this animal model.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1963
    Keywords: Schlüsselwörter Competitive RT-PCR ; LDL-Rezeptor ; HMG-CoA-Reduktase ; Key words LDL receptor ; HMG-CoA reductase ; Competitive RT-PCR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The present study exemplifies the method of quantitative reverse transcriptase – polymerase chain reaction (cRT-PCR) by quantifying, in bovine tissues, the specific mRNAs for the two key proteins which regulate cellular cholesterol metabolism, the low density lipoprotein (LDL) -receptor and the 3-hydroxy-3-methylglutaryl-Coenzyme A (HMG-CoA) reductase. Our data reveal a broad range of expression for both mRNAs. The LDL-receptor mRNA expression was highest in the adrenal gland (6.7 × 104 molecules/ug cellular RNA) followed by the corpus luteum of the ovary, intermediate in the liver (8.6 × 102 molecules/ug cellular RNA) and not detectable in the large intestine. Expression of the HMG-CoA reductase almost paralleled LDL-receptor values. It was found to be highest in the ovary (6.1 × 106 molecules/ug cellular RNA) followed by the adrenal gland, intermediate in the liver (3.1 × 105 molecules/ug cellular RNA) and lowest in the large intestine (9.9 × 104 molecules/ug cellular RNA). These data are consistent with other reports concerning the quantitative analysis of the expression of both proteins as determined by other experimental approaches. Thus cRT-PCR is a valuable tool for the quantitative analysis of the LDL-receptor and the HMG-CoA reductase.
    Notes: Zusammenfassung In der vorliegenden Arbeit wird eine Methode zur exakten Quantifizierung spezischer RNA, die kompetitive und damit quantitative Reverse-Transkriptase-Polymerase-Kettenreaktion (cRT-PCR) exemplarisch beschrieben. Im Vergleich mit konventionellen Verfahren hat diese Methode den Vorteil, daß bereits geringe Mengen an Untersuchungsmaterial zur Analyse ausreichen. Die spezifischen mRNAs für 2 Schlüsselproteine des zellulären Cholesterinstoffwechsels, den Low-density-Lipoprotein(LDL)-Rezeptor und die 3-hydroxy-3-methylglutaryl-Coenzym A(HMG-CoA)-Reduktase wurde in verschiedenen bovinen Geweben gemessen. Dabei zeigte sich eine besonders hohe Expression beider mRNAs in den steroidhormonproduzierenden Geweben, i. e. Corpus luteum des Ovars und der Nebenniere, eine mittlere Expression in der Leber und eine niedrige bzw. nicht meßbare Expression im Dickdarm. Die hier am Beispiel des LDL-Rezeptors und der HMG-CoA-Reduktase exemplarisch vorgestellte Methode der quantitativen RT-PCR läßt sich nicht nur in der Routinediagnostik, sondern auch auf eine Vielzahl von wissenschaftlichen Fragestellungen auf dem Gebiet der Stoffwechsel-, Entzündungs- und Tumorpathologie anwenden.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Der Pathologe 18 (1997), S. 218-227 
    ISSN: 1432-1963
    Keywords: Schlüsselwörter Atherosklerose ; Morphologie ; Klassifikation ; Komplikation ; Key words Atherosclerosis ; Morphology ; Classification ; Complication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Atherosclerosis and its complications determine the majority of deaths in the western world, followed by malignant tumors. The present work introduces a classification of stages of atherosclerotic disease based on relevant pathogenic and therapeutic concepts, elaborated by H. Stary. At the present, we are able to relate different lesion types to a time course and partly to interferences between participating cell populations as well as to special pathogenic stimuli. From the therapeutic view, this knowledge is fundamental for preventive as well as interventional strategies like gene therapy. Distinct atherosclerotic plaques reveal a different composition and architecture, which may account for the variable risk for further complications of lesions showing the same size and degree of stenosis. In combination with an advanced clinical and diagnostic characterization of atherosclerotic lesions, the present concept might contribute to a better and differential therapy of atherosclerosis.
    Notes: Zusammenfassung Die Atherosklerose ist mit ihren Folgeerkrankungen vor den malignen Tumoren für die Mehrheit der Todesfälle in der westlichen Welt verantwortlich zu machen. In der vorliegenden Arbeit wird eine von H. Stary erarbeitete, auf relevanten pathogenetischen und therapeutischen Konzepten beruhende Stadieneinteilung der Atherosklerose vorgestellt. Wir sind heute in der Lage, verschiedene Läsionstypen innerhalb eines zeitlichen Ablaufes einzuordnen und diese z.T. bestimmten pathogenen Stimuli sowie einer Wechselwirkung zwischen den beteiligten Zellpopulationen zuzuordnen. Aus therapeutischer Sicht sind diese Kenntnisse zum einen für präventive Maßnahmen wichtig, können zum anderen aber auch Basis für neue, z.B. gentherapeutische Ansätze sein. Die Kenntnis der Tatsache, daß gleichgroße, ein Gefäßlumen in ähnlichem Maße einengende atherosklerotische Plaques eine unterschiedliche zelluläre bzw. nichtzelluläre Zusammensetzung und Architektur besitzen können, kann die Varianz des durch solche Läsionen bedingten Risikos einer weiteren Komplikation erklären. In Verbindung mit einer verbesserten klinisch-diagnostischen Charakterisierung atherosklerotischer Plaques kann das hier vorgestellte Konzept Basis für eine optimierte, differenzierte Therapie der atherosklerotischen Gefäßerkrankung sein.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 65 (1987), S. 507-512 
    ISSN: 1432-1440
    Keywords: Cell culture techniques ; Primary cell cultures ; Growth factors ; Culture media ; Attachment factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cell culture systems allow the examination of cell populations in a functional state. To simulate in vivo conditions as closely as possible freshly established cell strains are superior to permanent cell lines. Different aspects for the establishment of primary cell cultures obtained from various tissues are compared: (1) Disintegration, (2) culture media supplemented with basal additions, (3) special supplements (growth factors, hormones), and (4) attachment factors. The proliferation rates of the attained cell strains were evaluated by determination of cell doubling times. Procedures for how to obtain a relatively high plating efficiency (approx. 70% in our series of 219 attempts) of primary growth in vitro are described: (1) Mechanical disintegration is superior to enzymatic digestion. If mechanical treatment alone did not produce a sufficient number of viable cells, additional digestion with collagenase/dispase revealed a higher number of proliferating primary cultures than with trypsin. (2) Proliferation of cell cultures from normal and tumorous tissues of epithelial origin was superior in Leibovitz L 15 medium (58 of 87 (67%) cases). Cultures from mesenchymal tissues and tumors were found to have shortest cell doubling times in MEM and RPMI 1640 (16 of 23 (70%) cases). The media were supplemented with the basal additions indicated. (3) In approx. 30% of the cases special supplements like growth factors or hormones increased cell replication, although they were almost always not essential for cell growth. (4) Attachment factors only rarely contributed to the initiation of primary monolayer cultures. The application of various culture conditions does not lead to a protocol optimal for all tissues, for all probes of the same type of tumor, or for all tumor specimens of unique differentiation.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1440
    Keywords: Lipoprotein (a) ; Low density lipoprotein ; High density lipoprotein ; Leukaemia ; Hypocholesterolaemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Twenty-two patients with acute myeloblastic leukaemia (AML) were studied to investigate disease-associated changes in lipid metabolism. Lipoprotein (a) [Lp(a)] levels were found to be elevated at the time of diagnosis (median 23 mg/dl; 41% of patient group had levels greater than 25 mg/dl) and diminished after successful chemotherapeutic treatment in 9 of 10 cases, with a maximum decrease from 56 to 10 mg/dl. In contrast, reduced levels of total cholesterol, low density lipoprotein (LDL) and high density lipoprotein (HDL) (medians 137, 87 and 20 mg/dl, respectively) were observed at the time of diagnosis. Cholesterol and HDL levels increased in all 10 and LDL in 9 cases in which complete remission was achieved. These data suggest that the catabolism of LDL-cholesterol might be even more enhanced than assumed to date. Furthermore, it indicates that the Lp(a) level in acute myeloblastic leukaemia is influenced either directly or indirectly by the leukaemic blasts.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 40 (1991), S. S77 
    ISSN: 1432-1041
    Keywords: Atherosclerosis ; lipid peroxidation ; antioxidants ; probucol ; WHHL rabbit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Probucol has been used as a lipid-lowering agent for over 10 years. Lately it has been found that its antiatherogenic action is due mainly to its antioxidative capacity, in addition to its known lipid-lowering effect. To study the antioxidative capability of probucol and its influence on plaque developement we used the animal model of the LDL-receptor-defective Watanabe heritable hyperlipidemic (WHHL) rabbit. In this study we measured all lipid values before and after probucol feeding and compared them with corresponding values in untreated controls. Probucol levels were determined, as were the physiological antioxidants alpha and gamma tocopherol (vitamin E). Thiobarbituric reactive substances were measured in plasma as a parameter for lipid peroxidation. In addition to the biochemical measurements the plaque area was analyzed macroscopically and microscopically to check the antiatherosclerotic effect and correlate it with the biochemical parameters. In four experiments we showed that probucol treatment in WHHL rabbits decreases the progression of atherosclerotic plaques by way of a combined lipid-lowering and antioxidative effect.
    Type of Medium: Electronic Resource
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