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  • Articles: DFG German National Licenses  (3)
  • Key words Myasthenia gravis  (1)
  • Key words:β-adrenoceptor agonist — Mast cells — Tryptase — TNF-α— Protein tyrosine phosphorylation  (1)
  • Microneurography  (1)
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  • Articles: DFG German National Licenses  (3)
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Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    The effects of S1319, a novel marine sponge-derived β2-adrenoceptor agonist, on IgE-mediated activation of human cultured mast cells (2000)
    Springer
    Inflammation research 49 (2000), S. 86-94 
    Details
    ISSN: 1420-908X
    Keywords: Key words:β-adrenoceptor agonist — Mast cells — Tryptase — TNF-α— Protein tyrosine phosphorylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Objective: This study aimed to evaluate the abil-ity of S1319 (4-hydroxy-7-[1-(1-hydroxy-2-methylamino) ethyl]-1,3-benzothiazol-2(3H)-one acetate), a novel β 2-adrenoceptor selective agonist derived from marine sponge, to inhibit IgE-mediated activation of human cultured mast cells (HCMC) in vitro.¶Materials and Methods: We examined the effect of S1319 (racemate) on tryptase release and tumor necrosis factor- α (TNF-α) production in HCMC generated from human cord blood cells, after cross-linking of high affinity immunoglobulin E receptors (FcεRI), compared with those of the non-selective β-adrenoceptor agonist, isoproterenol (R-isomer), the selective β 2-adrenoceptor agonist, salbutamol (racemate), and the selective and long-acting β 2-adrenoceptor agonist, formoterol (racemate). We also evaluated the effect of S1319 on the intracellular cAMP level, inositol phosphate production and protein tyrosine phosphorylation in HCMC.¶Results: S1319 and β-adrenoceptor agonists inhibited the IgE-mediated release of tryptase. Approximate IC50 values of S1319, formoterol, isoproterenol and albuterol for the inhibition of tryptase release were 0.51 ± 0.12, 0.15 ± 0.1, 0.80 ± 0.09, and 28 ± 32.4 nM, respectively. S1319 and β-adrenoceptor agonists also inhibited TNF-α production by HCMC in a concentration-dependent manner. Approximate IC50 values of S1319, formoterol and isoproterenol for the inhibition of TNF-α production were 0.19 ± 0.03, 0.28 ± 0.02 and 0.32 ± 0.03 nM, respectively. S1319 caused a concentration-dependent increase in total cell cyclic AMP levels in HCMC. On the other hand, S1319 inhibited the accumulation of inositol 1,4,5-triphosphate and IgE-mediated protein tyrosine phosphorylation of 42-kDa protein, p42 mitogen activated protein (MAP) kinase (ERK-2).¶Conclusion: These results indicate that S1319 and β-adrenoceptor agonists are potent inhibitors of the IgE-mediated release of mediators from HCMC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000110050563
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Sleep apnoea in well-controlled myasthenia gravis and the effect of thymectomy (1998)
    Springer
    Journal of neurology 245 (1998), S. 77-80 
    Details
    ISSN: 1432-1459
    Keywords: Key words Myasthenia gravis ; Sleep apnoeas ; Thymectomy ; Polysomnography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We conducted overnight polysomnographic sleep studies of 16 patients (5 men and 11 women) with clinically well-controlled myasthenia gravis (MG). The subtypes of MG were IIA (3 patients), IIB (11 patients), IV (1 patient) and V (1 patient). Twelve patients were found on polysomnography to have obstructive and/or central types of the sleep apnoeas (SA). Their mean age was 42.4, SD 16.4 years, and the mean duration of MG was 7.4, SD 6.96 years. SA was not detected in 4 patients whose mean age was 30.8, SD 10.71 years and who had manifested MG for a mean duration of only 0.9, SD 0.65 years. Thus, patients with a longer duration of MG tended to have more SA. In 9 of the 12 SA patients, polysomnographic studies were repeated following thymectomy. SA had resolved in 6 patients, but persisted in 3. These findings suggest that SA is a possible clinical manifestiation of MG and that nocturnal dysfunction of both peripheral and central colinergic systems may be involved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004150050181
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Microneurographic analysis of muscle sympathetic nerve activity in amyotrophic lateral sclerosis (1993)
    Springer
    Clinical autonomic research 3 (1993), S. 131-135 
    Details
    ISSN: 1619-1560
    Keywords: Amyotrophic lateral sclerosis ; Microneurography ; Muscle sympathetic nerve activity ; Blood pressure ; Heart rate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Muscle sympathetic nerve activity by (microneurograph) blood pressure and heart rate has been studied in patients with amyotrophic lateral sclerosis and in age-matched normal subjects (controls) at rest and during head-up tilt. Muscle sympathetic nerve activity in amyotrophic lateral sclerosis patients was significantly increased at rest unlike controls. There was no correlation between muscle sympathetic nerve activity and age in the patients with amyotrophic lateral sclerosis. Elevated muscle sympathetic nerve activity was present mainly in younger patients. There were no differences between blood pressure or heart rate in either group at rest or during head-up tilt in amyotrophic lateral sclerosis. The increase in muscle sympathetic nerve activity following tilt in the amyotrophic lateral sclerosis patients was less than in the controls, but they had no postural hypotension. The possible reasons for this observation of increased muscle sympathetic nerve activity at rest in amyotrophic lateral sclerosis are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01818998
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    Paper (German National Licenses)
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