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  • 1
    Digitale Medien
    Digitale Medien
    Dissociation of digoxin-like immunoreactivity and Na+,K+-ATPase inhibitory activity in rat plasma (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 992-993 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Endogenous digitalis-like factor ; digoxin-like immunoreactivity ; Na+,K+-ATPase inhibitor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary We measured endogenous digitalis-like factor (EDF) in rat plasma during acute saline infusion by two different procedures. Na+,K+-ATPase inhibitory activity in the rat plasma significantly increased during saline loading (7.8±2.2 vs 2.5±0.9%, with and without acute saline loading, respectively, p〈0.05). On the other hand, the plasma digoxin-like immunoreactivity significantly decreased during acute saline loading (16.9±1.6 vs 32.0±2.8 pg digoxin equivalents/ml. with and without acute saline loading, respectively, p〈0.01). These results indicate that the major substances detected by digoxin-like immunoreactivity and direct Na+,K+-ATPase inhibitory activity are completely different, at least in rat plasma.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01939897
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  • 2
    Digitale Medien
    Digitale Medien
    Further evidence for the dissociation of digoxin-like immunoreactivity from Na+, K+-ATPase inhibitory activity (1990)
    Springer
    Cellular and molecular life sciences 46 (1990), S. 1041-1043 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Endogenous digitalis-like factor ; digoxin-like immunoreactivity ; Na+, K+-ATPase inhibitor ; adrenalectomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The effects of adrenalectomy or nephrectomy, carried out one hour previously, on the levels of endogenous digitalis-like factors were determined in rat plasma. Factors were assayed by digoxin-like immunoreactivity and direct Na+, K+-ATPase inhibitory activity. Digoxin-like immunoreactivity significantly decreased one hour after bilateral ablation of adrenals, while Na+, K+-ATPase inhibitory activity remained unaltered. There were no changes in either activity one hour after bilateral nephrectomy. These results suggest that digoxin-like immunoreactivity may be derived from the adrenal gland or under adrenal control and the major substances detected by digoxin-like immunoreactivity and direct Na+, K+-ATPase inhibitory activity may be different.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01940667
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  • 3
    Digitale Medien
    Digitale Medien
    Stimulation of prostaglandin E"2 release from cultured rabbit gastric cells by sodium deoxycholate
    Amsterdam : Elsevier
    Prostaglandins 47 (1994), S. 423-436 
    Details
    ISSN: 0090-6980
    Schlagwort(e): Prostaglandin E"2 ; calcium ; calmodulin ; cultured rabbit gastric cells ; phospholipase A"2 ; protein kinase C ; sodium deoxycholate
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0090-6980(94)90043-4
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  • 4
    Digitale Medien
    Digitale Medien
    Translocation of protein kinase C α and ζ in rat glomerular mesangial cells cultured under high glucose conditions (1994)
    Springer
    Diabetologia 37 (1994), S. 838-841 
    Details
    ISSN: 1432-0428
    Schlagwort(e): Diabetic nephropathy ; glomerular mesangial cells ; protein kinase C ; isoenzymes ; high glucose
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The activities and expression of protein kinase C isoenzymes were examined in glomerular mesangial cells cultured under high glucose conditions. Exposure of cells to high glucose concentrations (27.8 mmol/l) for more than 3 days resulted in a significant elevation of protein kinase C activities in the membrane fraction. Of the protein kinase C isoenzymes, the levels of protein kinase C α significantly increased in the membrane fraction after 3 days of exposure to glucose, and protein kinase C ζ increased after 5 days of exposure. Levels of protein kinase C δ and ε remained unchanged and protein kinase C Β and γ were not detected. These results indicate that protein kinase C α and ζ are translocated under high glucose conditions possibly through different mechanisms.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00404342
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  • 5
    Digitale Medien
    Digitale Medien
    Plasma adenosine concentrations are elevated in Dahl salt-sensitive rats (1995)
    Springer
    Cellular and molecular life sciences 51 (1995), S. 227-229 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Adenosine ; Dahl salt-sensitive rats ; high-performance liquid chromatography ; hypertension
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract We measured plasma levels of adenosine in Dahl salt-sensitive rats (DS) and Dahl salt-resistant rats (DR) to examine the potential role of adenosine in cardiovascular regulation in this type of hypertension. Plasma adenosine concentrations were significantly higher in DS than in DR. The NaCl content in the diet did not affect plasma adenosine concentration in either DS or DR. Significant positive correlation was found between adenosine concentrations and systolic blood pressure when the data for DS and DR were analyzed together. These results suggest that adenosine may play an important role in the pathophysiology of hypertension in DS.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01931102
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  • 6
    Digitale Medien
    Digitale Medien
    Renal and hormonal effects of alpha1-adrenoceptor blockade by bunazosin in essential hypertension (1989)
    Springer
    European journal of clinical pharmacology 36 (1989), S. 575-578 
    Details
    ISSN: 1432-1041
    Schlagwort(e): bunazosin ; hypertension ; alpha1-adrenoceptor blocker ; blood pressure ; renal blood flow ; renal function ; renin ; aldosterone ; atrial natriuretic peptide
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Summary The renal and hormonal effects of the α1-adrenoceptor blocker bunazosin were examined in 6 patients with essential hypertension. Oral bunazosin for 4 to 12 weeks significantly decreased mean blood pressure by 10%, increased effective renal blood flow and creatinine clearance by 34% and 37%, respectively, the plasma norepinephrine concentration was elevated by 60%, and the plasma atrial natriuretic peptide level was lowered by 22%. The plasma renin activity and aldosterone concentration were unchanged. Thus, a moderate reduction in blood pressure was produced by bunazosin treatment while maintaining renal perfusion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00637738
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  • 7
    Digitale Medien
    Digitale Medien
    Roles of Ca2+ and protein kinase C in regulation of prostaglandin E2 release by cultured rabbit gastric epithelial cells (1993)
    Springer
    Digestive diseases and sciences 38 (1993), S. 1426-1434 
    Details
    ISSN: 1573-2568
    Schlagwort(e): cultured rabbit gastric cells ; prostaglandin E2 release ; protein kinase C ; Ca2+ ; cAMP
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Prostaglandin (PG) has been reported to be one of the important protective factors in the gastric mucosa. However the mechanism of the regulation of endogenous PG production has not been well studied. We investigated the possible roles of Ca2+, cAMP, and protein kinase C (PKC) in the regulation of PGE2 release from cultured rabbit gastric mucosal cells. PGE2 was measured by radioimmunoassay. A23187 (Ca2+ ionophore) at 2×10−6 M significantly increased PGE2 release. Deprivation of Ca2+ from the medium blocked the A23187-induced increase of PGE2. TMB-8 (a putative inhibitor of Ca2+ release from intracellular stores) did not have any significant effects on the increase of PGE2-induced by A23187. Thus, A23187 increased PGE2 through the influx of extracellular Ca2+. W7 or compound 48/80 (calmodulin inhibitors) did not alter the response of PGE2 caused by A23187. Exogenous administration of cAMP, forskolin (an activator of adenylate cyclase), or 2-chloroadenosine (a possible activator of adenylate cyclase through adenosine A2 receptor) had neither significant effects on PGE2 release nor an effect on A23187-induced increase of PGE2 release. 12-O-tetradecanoylphorbol 13-acetate (TPA, an activator of PKC) significantly stimulated PGE2 release in a dose-dependent fashion, whereas another phorbol ester with no biological activity did not. A23187 at 0.8×10−6 M, but not cAMP, potentiated the TPA-induced increase of PGE2. Mepacrine (a phospholipase A2 inhibitor) reduced the A23187-and TPA-induced increase of PGE2. These results suggest that Ca2+ and protein kinase C may play important roles in the regulation of PGE2 release by cultured rabbit gastric cells.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01308599
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