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  • 1
    ISSN: 1432-1041
    Keywords: Dipyridamole, Acetylsalicylic acid, Urinary protein excretion ; antiplatelet agents, platelet aggregation, thromboxane synthesis, glomerulonephritis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The antiproteinuric effect of the antiplatelet agent dipyridamole has been assessed after inhibiton of thromboxane B2 (TxB2) synthesis in 8 patients with confirmed membranous glomerulonephritis. There were three study periods, each of 30 days, and 45 days apart, namely a washout period, treatment with dipyridamole 300 mg/d, and dipyridamole 225 mg/d plus aspirin 150 mg/d. On Days 1 and 30 of each study period serum and urine creatinine, 24-h excretion of protein, creatinine clearance, platelet aggregometry on whole blood and serum TxB2 were measured. Treatment with dipyridamole alone or with aspirin produced significant inhibition of platelet aggregation and a fall in 24-h protein excretion; the latter amounted to 54% with dipyridamole alone and 56 % with dipyridamole plus aspirin (NS). Dipyridamole plus aspirin caused an 82 % reduction in serum TxB2.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1041
    Keywords: Triflusal ; Acetylsalicylic acid ; platelet activation ; platelet-vessel wall interaction ; subendothelium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract The ex vivo effect of triflusal and acetylsalicylic acid (ASA) on platelet interaction with the subendothelium using the Baumgartner perfusion system (wall shear rate 350 s−1) was assessed in blood from 10 healthy volunteers who given a 15-day course of triflusal 600 mg per day and ASA 400 mg per day in a crossover trial. The percentage of platelets on the subendothelium showed a decrease of 62% in samples from subjects on ASA and a decrease of 93% in those from subjects on triflusal (P〈0.005). The percentage of the subendothelial surface covered by platelets was reduced by 23.3% after treatment with ASA, mainly due to inhibition of aggregates (75.2%), and by 29.9% after treatment with triflusal, mainly due to inhibition of aggregates (89.6%) and of adhesion (25%). The subendothelial surface covered by activated platelets (adhesions and thrombi) showed 32.5% inhibition after treatment with triflusal and 11.6% after treatment with ASA (P〈0.043 vs. triflusal). In the in vitro experiments, 10 μmol·l−1 triflusal did not modify the percentage of the subendothelium covered by platelets. HTB 1 mmol·l−1 inhibited adhesion (26%) and aggregates (18%). We conclude that HTB participates in the ex vivo effects of triflusal on the platelet-subendothelium interaction.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1041
    Keywords: asthma ; theophylline ; fenoterol ; sustained-release formulation ; serum theophylline levels ; bronchodilator effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Sustained-release theophylline 10.1 mg/kg b.d. was given with placebo or fenoterol 2.5 mg t.d.s. to 12 patients with chronic airway obstruction. Fenoterol did not significantly affect the steady-state serum theophylline trough level (11.84 µg/ml for fenoterol vs 11.10 µg/ml for placebo). Addition of fenoterol produced no further increase in spirometric function nor in clinical status.
    Type of Medium: Electronic Resource
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