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  • 1
    ISSN: 1432-1440
    Keywords: Renal artery stenosis ; Hypertension ; Peripheral arterial occlusive disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In order to evaluate the prevalence of renal artery stenoses and the coincidence with hypertension, in this study 110 patients (24 women, 86 men, mean age 63.2±8.6 years) underwent retrograde aortography for reason of symptomatic arteriosclerosis obliterans of the lower limb arteries. In 18 (16.4%) patients renal artery stenoses by which the lumen was narrowed for more than 30% and in 2 (1.8%) patients occlusions of one renal artery were found, all of which seemed to be of arteriosclerotic origin. 12 (60%) patients with renal artery stenoses or occlusions showed arterial hypertension (RR 171±33/94±16 mmHg) inspite of adequate antihypertensive medication, 8 were normotensive even though renal artery stenoses were found angiographically. On the other hand 30 (33%) of the 90 patients without renal artery stenoses were hypertensive (RR 165±15/93±9 mmHg). These data support the observation that renal artery stenoses must not result in hypertension, but clearly indicate the higher prevalence of hypertension in patients with renal artery stenoses or occlusions. With regard to the low-risk procedure of percutaneous transluminal dilatation of renal arteries, it seems to be valuable for hypertensive patients to include renovasography into the angiographic evaluation of symptomatic lower limb arteriosclerosis.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 9 (1982), S. 0 
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. The effect on renal function in sheep of inhibiting converting enzyme with captopril was examined before and after 5 days ACTH administration.2. Glomerular filtration rate, effective renal plasma flow, effective renal blood flow, mean arterial pressure and plasma sodium were all significantly incereased by ACTH treatment and plasma potassium was decreased. Captopril (20 mg i.v.) had no effect on renal function or blood pressure before or after ACTH treatment, although urinary potassium excretion decreased following captopril on day 6 of ACTH treatment.3. The increase in glomerular filtration rate and effective renal plasma flow seen with ACTH treatment in sheep does not appear to be mediated by the renin-angiotensin system.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 17 (1983), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Human lymphocytes alloactivated in vitro were cloned by limiting dilution in the presence of filler cells and interleukin 2 (IL 2)-containing supernatants of phytohaemagglutinin-stimulated lymphocytes. Clones with allospecific proliferative reactivity (PLT clones), measured by tritiated thymidine (3H-TdR) incorporation, were selected for extensive IL 2-dependent expansion. The cloned lines had finite lifespans, ranging from an estimated minimum of 28 to 〉 65 doublings. Function as PLT reagents, however, was retained in all cases for only an estimated 30 cell doublings. This apparent cessation of function was not caused by loss of the ability to metabolize thymidine, since lines continuing to grow for 〉 30 doublings still incorporated 3H-TdR in the presence of IL 2. An altered requirement for stimulating antigen (number of stimulating cells), or altered response kinetics, did not contribute to loss of PLT function. Exogenous IL 2 added during restimulation to responders previously ‘rested’ overnight without IL 2 did not restore the response. Thus, under present experimental conditions, functional lifespans of cloned PLT reagents appear fixed at ˜ 30 cell doublings.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Molecular and cellular biochemistry 36 (1981), S. 169-176 
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary Cellular research in aging has been stimulated by the observation that human diploid cells have a limited number of cell divisions in culture. This loss of cellular proliferation (in vitro senescence) has been extensively studied by biochemical, clonal, and genetic analysis. Studies of human skin fibroblast cultures have revealed thatin vitro senescense is related toin vivo human cellular aging. Recently differentiated cells have been proposed for aging studies. These cells may provide additional information on aging since alterations ofin vitro cellular functions may be related to thein vivo behavior of specific differented cell types.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 65 (1984), S. 242-247 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The Dwl specificity was highly correlated with the serologically determined HLA-DR1 antigen in the Eighth International Histocompatibility Workshop 1980. By testing a large number of HLA-Dwl, DR1 defined homozygous typing cells (HTC) in a checkerboard primary mixed lymphocyte reaction, on a panel of about 30 HLA-DR1 heterozygous individuals, and in family segregation, three Dwl “subtypes” could be defined in association with certain HLA-A, -B, and -C-antigens. HTC TA, FRI, and FRA carrying the HLA haplotypes A11, B35, Cw4 or A3, B35, Cw4 in the homozygous state gave positive typing results with most HLA-DR1 positive panel members and stimulated only four other Dw1 HTCs (SRR≦35%). In contrast to this operationally “broad” specificity, Dw1-HTC-HEN (HLA-A2, B44, C-, homozygous) was non-stimulatory to all HTCs except one, but gave high responses against these, leading to the definition of a “narrow” specificity included in the “broad” one. Another such “narrow” specificity was represented by HTC FEE (HLA-A2, B27, Cw2 homozygous). Typing patterns with FEE were mostly different from those defined with other HTC. In family studies a specific typing pattern for this HTC could be shown to segregate with HLA. However, within some of these responses a contribution of the HLA haplotype in the trans position must be assumed.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-2048
    Keywords: Amyloplasts ; Enzyme conversion ; Phosphorylose (starch) ; Senescence ; Solanum ; Starch phosphorylase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phosphorylase was purified from young and senescent potato tubers. Antibodies raised against the enzyme from young tubers crossreacted with phosphorylase from old tissue, although the latter exhibited different physico-chemical properties. In polyacrylamide gel electrophoresis it migrated with higher mobility, its subunit molecular weight was determined in the range of 40,000 in contrast to 100,000 of the phosphorylase in young tubers. The enzyme of senescent tubers displayed an isoelectric point of 5.4 different from the one of young tubers with 5.0, and the diffusion coefficients of the two enzymes varied. The appearance of the phosphorylase form typical for senescent tissue is connected with changes in the intracellular localization as revealed by immunofluorescence. Before massive starch accumulation is initiated, non-vacuolated subepidermal cells contain antigenically active material in their cytoplasm. During starch accumulation in fully differentiated storage parenchyma, only amyloplasts fluoresce, indicating the presence of adsorbed phosphorylase protein. Cytoplasmic phosphorylase can be detected in the continuance of senescence and, finally, after 16 months of tuber storage, the particle-bound enzyme had mostly disappeared. Simultaneously, we observed membrane destruction and decomposition on the ultrastructural level. The phosphorylase from senescent potatoes is a converted molecule and seems to be formed by proteolytic cleavage. The location of phosphorylase in the amyloplasts during starch synthesis indicates that it also plays a role in starch synthesis and not only in its degradation.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 228 (1982), S. 249-258 
    ISSN: 1432-1459
    Keywords: Parkinson's disease ; Bromocriptine ; Long-term efficacy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Langzeiterfahrungen mit Bromocriptin beim fortgeschrittenen Parkinsonsyndrom. Ergebnisse einer 1-Jahres-Behandlung. An 32 Patienten (20 Männer, 12 Frauen) im Alter von 43–76 Jahren (mittl. Alter 65,4 J.), die seit 3–20 Jahren (mittl. Dauer 9,3 J.) an einem Morbus Parkinson litten, wurden die Langzeiteffekte von Bromocriptin als Adjuvans untersucht. Die Patienten waren seit 24–116 Monaten (mittl. Dauer 74,9 Mon.) mit L-Dopa/Decarboxylasehemmer vorbehandelt. Die Bromocriptinbehandlung wurde eingeleitet wegen eines Nachlassens der L-Dopa-Wirkung, verschiedener Erscheinungen des „on-off“-Phänomens und ausgeprägter Dyskinesien. L-Dopa konnte im Mittel um 18% reduziert werden, Bromocriptin wurde in einer mittleren Dosis von 29 mg gegeben. Die Ergebnisse zeigen, daß die Besserung der neurologischen Symptomatik, gekennzeichnet durch ein besseres Ansprechen von Tremor und Rigidität als der Bradykinese der Hände, über einen Zeitraum von 12 Monaten konstant gehalten werden konnte. Lediglich die Gangstörungen neigten zu einer erneuten Verschlechterung. Gleichzeitig wies die Selbsteinschätzung der Patienten hinsichtlich der Behinderung in den Aktivitäten des täglichen Lebens eine Verschlechterung im Vergleich zu dem nach 4 Wochen erzielten Behandlungsergebnis aus. Ebenso waren die “on-off”-Erscheinungen wieder stärker ausgeprägt. Die Akinesia paradoxica ließ sich nicht positiv beeinflussen. Eine Zunahme von Dyskinesien konnte vermieden, ernsthafte Nebenwirkungen anderer Art unter Kontrolle gehalten werden.
    Notes: Summary The long-term effects of bromocriptine as an adjuvant were investigated in 32 patients (20 male, 12 female), aged 43–76 years (mean 65.4), suffering from parkinsonism for 3–20 years (mean 9.3). Patients were pretreated with levodopa/decarboxylase inhibitor for 24–116 months (mean 74.9). Bromocriptine was given because of a decline in the response to levodopa, various kinds of “on-off” phenomena, and disabling dyskinesias. Levodopa was reduced by 18%, while bromocriptine was added with a mean dose of 29 mg. The results showed a marked tremor and rigidity response, clearly greater than that of bradykinesia of the hands. The improvement after 4 weeks of bromocriptine treatment was maintained over 12 months. Only gait disturbances tended to increase. At the same time the self-ratings of the patients showed an increase in disability as far as daily activities were concerned. Likewise, the “on-off” symptoms with regard to the wearing-off effects worsened in comparison with the condition during the 4-week period. Akinesia paradoxica was never definitely influenced. An increase in dyskinesias was avoided and serious side-effects could be kept under control.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 58 (1981), S. 125-138 
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-2048
    Keywords: Concanavalin receptors ; Endoplasmic reticulum ; Lepidium ; Statocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Using Concanavalin A (Con A) labeled with fluorescein isothiocyanate, we studied the intracellular localization of receptor molecules in the calyptra of 24-h dark-grown cress roots. Fixation in glutaraldehyde gave positive binding of the distal complex of the endoplasmic reticulum and the nucelus in the statocytes. In contrast, fixation in formaldehyde did not preserve the membrane-associated receptors, but revealed Con A affinity of the starch grain surface within the amyloplasts. Treatment of glutaraldehydefixed sections with non-ionic detergents led to partial solubilization of membrane components: the starch grain surface turned positive, though the positive binding of Con A to the endoplasmic reticulum and the nucleus remained unaffected. We therefore conclude that the Con A receptor in the membrane is a glycoprotein tightly inserted in other components of the compartment.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 39 (1980), S. 233-238 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The characteristic ferroelectric dispersion of the complex dielectric constant of the ferroelectric AgNa(NO2)2 is measured as function of temperature and hydrostatic pressure. For the first time the temperature and pressure dependences of the static order parameter susceptibility and the order parameter relaxation time could be reproducibly determined. The results are interpreted in terms of a kinetic Ising model, whose parameters show a characteristic pressure dependence. The results are discussed on the basis of thermodynamic relations and related to the dynamical behaviour of other order-disorder ferroelectrics.
    Type of Medium: Electronic Resource
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