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  • 1
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Betahistine produced a concentration-dependent contraction of the guinea-pig ileum and was about 27 times less active than histamine in this respect. Betahistine induced desensitization of contractile responses to histamine in the guinea-pig ileum. The H1 histamine receptor antagonist mepyramine was a competitive antagonist of the action of betahistine on the guinea-pig ileum. Betahistine caused relaxation of the rat uterus contracted by acetylcholine, and this action of betahistine was blocked by the H2 receptor antagonist cimetidine. Betahistine had a concentration-dependent positive chronotropic action on isolated guinea-pig atria, and in this respect was tenfold less potent than histamine. The action of betahistine on the atria was blocked by the H2 receptor antagonist YM11170. Betahistine caused a concentration-related contraction of the isolated lung parenchymal strip of the guinea-pig, and YM11170 potentiated this effect. Betahistine failed to release histamine from rat peritoneal mast cells at concentrations up to 100 μM and it did not prevent histamine release induced by either substance P or anti-IgE. Betahistine produced a dose-related flare and wheal reaction when injected intradermally into human skin. It is concluded that betahistine has agonist activity at both H1 and H2 receptors for histamine.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1569-8041
    Keywords: breast ; cancer ; inflammatory ; multimodality ; surgery ; therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background:In many centres surgery is used as part of a combinedmodality approach to the treatment of inflammatory breast cancer (IBC).Nevertheless, its value is controversial given the high risk of metastaticrelapse and poor overall prognosis. We have reviewed patients with true IBCprospectively treated at the Royal Marsden Hospital in chemotherapy trials toassess further the role of surgery as part of combined modality treatment. Patients and methods:Fifty-four patients who had responsive orstable disease to primary chemotherapy went on to have either radiotherapyalone (n = 35) or surgery plus radiotherapy (n = 19); thedecision on surgery was based partly on clinician preference and partly onclinical response. Results:The 35 patients undergoing radiotherapy alone had amedian progression-free survival (PFS) of 16 months and median overallsurvival (OS) of 35 months. Twenty-four patients (69%) have relapsedwith a total of twelve (34%) relapsing locally. In comparison, the 19patients receiving both surgery and radiotherapy had a PFS of 20 months, anda median OS of 35 months. Fifteen patients (79%) have relapsed, eight(42%) of these locally. None of these differences were statisticallysignificant. Conclusions:These results do not suggest a clinical advantage forsurgery in addition to chemotherapy and radiotherapy for patients with IBC.They support the need for a prospective randomised trial to address thisquestion.
    Type of Medium: Electronic Resource
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