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  • Title: A sulphonamido-indanone derivative CGP 28237 (ZK 34228), a novel non-steroidal anti-inflammatory agent without gastro-intestinal ulcerogenicity in rats.
    Author: Böttcher I, Schweizer A, Glatt M, Werner H.
    Journal: Drugs Exp Clin Res; 1987; 13(5):237-45. PubMed ID: 3500026.
    Abstract:
    CGP 28237 (5-methylsulphonylamino-6-phenoxy-1-indanone) belongs to a series of structurally novel indanones. The compound is a weak acid (pK = 6.98), but it does not contain a carboxylic group. CGP 28237 exhibits potent anti-inflammatory activity in developing and established adjuvant arthritis in rats (ED40 approximately 0.5 mg/kg p.o.) and good activity in carrageenin oedema (ED40 approximately 3 mg/kg p.o.). It inhibits yeast-induced fever in rats with ED50 values of 1, 2 and 10 mg/kg p.o. at 1, 3 and 5 hours after drug administration. The antinociceptive activity in mice (phenyl-p-benzoquinone writhing) and rats (acetic-acid writhing) is weak. CGP 28237 has been shown to be non-ulcerogenic in rats under acute and chronic test conditions: it does not cause mucosal lesions in the stomach at 2 X 400 mg/kg p.o., it does not enhance gastro-intestinal blood loss during 10 days' oral treatment with 400 mg/kg p.o., and it did not induce gastro-intestinal lesions in a 4-week toxicity study up to 1000 mg/kg p.o. Although CGP 28237 is not a cyclooxygenase inhibitor in bovine seminal vesicle microsomes, it inhibits prostaglandin synthesis in zymosan-stimulated murine macrophages (IC50 approximately 3 X 10(-6) mol/l) and protects rabbits against arachidonic acid-induced lung embolism with 10 mg/kg p.o. CGP 28237 may represent a novel anti-inflammatory drug with excellent gastro-intestinal tolerability.
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