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  • Bacterial sensor protein  (1)
  • Cell & Developmental Biology  (1)
  • Essential hypertension  (1)
  • 1
    ISSN: 0014-5793
    Keywords: Bacterial sensor protein ; Phytochrome phylogeny ; Phytochrome sensor protein ; Phytochrome, mode of action
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 55 (1977), S. 351-353 
    ISSN: 1432-1440
    Keywords: Plasma renin activity ; Long-term treatment ; Propranolol ; Essential hypertension ; Propranolol ; Essentielle Hypertonie ; Plasmareninaktivität ; Langzeitbehandlung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 17 Patienten im Alter von 40±9 Jahren mit essentieller Hypertonie wurden mit Propranolol als Monotherapie oral in Dosen von 120, 160 oder 240 mg pro die behandelt. Nach 4wöchiger Behandlung konnten der Blutdruck und die Herzfrequenz statistisch signifikant gesenkt werden und blieben auch bei Fortsetzung der Therapie nach insgesamt 6 Monaten unverändert. Die Plasmareninaktivität betrug vor Behandlungsbeginn 5,7±6,3 ng/ml/h und sank nach 4wöchiger Behandlung auf 1,8±1,3 ng/ml/h ab. 5 Monate später stieg das Plasmarenin im Durchschnitt wieder auf 5,0±0,9 ng/ml/h an. Der erneute Anstieg war ebenfalls statistisch signifikant zu sichern. Von den 17 Patienten hatten nach 6 monatiger Therapie noch 7 (41%) eine niedrigere Plasmareninaktivität als vor Behandlungsbeginn. Davon lagen aber nur 3 (18%) unter dem Wert, der nach 4wöchiger Behandlungsdauer bestimmt wurde. Aus den genannten Befunden wird geschlossen, daß der Wiederanstieg der Plasmareninaktivität möglicherweise ein reaktiver Mechanismus auf die langzeitige Blutdrucksenkung ist. Die Erniedrigung der Plasmareninaktivität nach Kurzzeitbehandlung mit Propranolol kann nicht als ein Mechanismus für den antihypertensiven Effekt dieses Medikaments bei der Langzeitbehandlung angesehen werden.
    Notes: Summary 17 patients (40±9 years) with essential hypertension were included in the study. A monotherapy of 120, 160 or 240 mg propranolol per day was administered orally according to the antihypertensive effect. Four weeks after treatment, blood pressure and heart rate showed a statistically significant decrease and remained unchanged over a period of six months. Plasma renin activity decreased significantly from 5.7±6.3 ng/ml/h at the beginning of the study to 1.8±1.3 ng/ml/h after 4 weeks. 5 months later however plasma renin activity increased again to 5.0±0.9 ng/ml/h. The difference was statistically significant. From 17 patients 7 (41%) had lower levels of plasma renin activity after 6 months treatment when compared with pretreatment values. In only 3 patients (18%) was plasma renin activity lower after 6 months than after four weeks. We conclude that the increase in plasma renin activity is a reactive mechanism to the reduced blood pressure under long-term conditions. The decrease of plasma renin activity in short-term treatment of essential hypertension is not a mechanism responsible for the antihypertensive effect of propranolol during long-term treatment.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 212 (1985), S. 345-352 
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Previous studies have shown that sexual activity increases the weight of the accessory sex glands significantly, while the organ weights correlate inversely with the assayable androgen receptor concentrations in the prostate of sexually active versus sexually resting rats. In an effort to determine the structural basis of this phenomenon, the ventral prostates of adult rats kept with female rats for 4-6 months (HE-rats) were compared to those kept in groups of 5 males in one cage (HO-rats) for the same period. As an estimate of the secretory function of the gland the concentration of prostatic binding protein (PBP) was determined in prostatic cytosols using a highly specific ELISA. Catecholamines were measured by means of HPLC and subsequent electrochemical detection. Morphological studies included immunocytochemistry of PBP, visualization of adrenergic nerves, stereological analysis of stromal and glandular compartments of the prostate, and electron microscopy of the epithelium.The main findings were as follows: (1) The prostates of HE-rats were 35% heavier than those of the HO-rats. (2) The content in secretion was in the same range in both HE-rats and HO-rats (1.5 and 1.44 mg PBP per 1 mg DNA). (3) Immunocytochemistry and electron microscopy demonstrated a very homogeneous secretion within the glandular lumen of HO-rats with a diminished amount of secretory material within the glandular cells.In HE-rats the glandular lumina were clearly larger in diameter and intraluminal secretion was less homogeneously stained. The height of the epithelium was increased and the individual secretory cells contained several secretory granules. Within the prostatic stroma the profiles of adrenergic nerves were more numerous in HE-rats, and a greater total amount of noradrenaline was present. At the fine structural level signs of enhanced membrane turnover, such as lysosomal structures, were prominent in prostatic epithelium of HE-rats, while in HO-rats mostly dense bodies were observed. The results indicate that sexual activity results in the functional adaption (activity hypertrophy) of the prostate as a result of nerve-associated control of glandular activity.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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