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  • 1
    Electronic Resource
    Electronic Resource
    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
    Keywords: Endogenous digitalis-like factor ; digoxin-like immunoreactivity ; Na+,K+-ATPase inhibitor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01939897
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    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
    Keywords: Endogenous digitalis-like factor ; digoxin-like immunoreactivity ; Na+, K+-ATPase inhibitor ; adrenalectomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01940667
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    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
    Keywords: Prostaglandin E"2 ; calcium ; calmodulin ; cultured rabbit gastric cells ; phospholipase A"2 ; protein kinase C ; sodium deoxycholate
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0090-6980(94)90043-4
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  • 4
    Electronic Resource
    Electronic Resource
    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
    Keywords: Diabetic nephropathy ; glomerular mesangial cells ; protein kinase C ; isoenzymes ; high glucose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00404342
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    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
    Keywords: cultured rabbit gastric cells ; prostaglandin E2 release ; protein kinase C ; Ca2+ ; cAMP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01308599
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    Paper (German National Licenses)
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