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Bulletin of the New York Academy of Medicine logoLink to Bulletin of the New York Academy of Medicine
. 1989 Jan;65(1):36–44.

Immunosuppression in irradiated breast cancer patients: in vitro effect of cyclooxygenase inhibitors.

J Wasserman, H Blomgren, S Rotstein, B Petrini, S Hammarström
PMCID: PMC1807786  PMID: 2513994

Abstract

We have documented in previous studies that local irradiation therapy for breast cancer caused severe lymphopenia with reduction of both T and non-T lymphocytes. Non-T cells were relatively more depressed but recovered within six months. The recovery of T cells, on the other hand, remained incomplete 10-11 years after irradiation. Several lymphocyte functions were also severely impaired. An association was found between prognosis and postirradiation mitogen reactivity of lymphocytes from these patients. Mortality up to eight years after irradiation was significantly higher in patients with low postirradiation phytohemagglutinin and PPD reactivity. The radiation induced decrease in mitogenic response seemed mainly to be caused by immunosuppressive monocytes, which suggests that the underlying mechanism might be mediated by increased production of prostaglandins by monocytes. For this reason we examined the effect of some cyclooxygenase products on different lymphocyte functions and found that prostaglandins A2, D2, and E2 inhibited phytohemagglutinin response in vitro. Natural killer cell activity was also reduced by prostaglandins D2 and E2. The next step was to examine various inhibitors of cyclooxygenase in respect to their capacity to revert irradiation-induced suppression of in vitro mitogen response in lymphocytes from breast cancer patients. It was demonstrated that Diclofenac Na (Voltaren), Meclofenamic acid, Indomethacin, and lysin-mono-acetylsalicylate (Aspisol) could enhance mitogen responses both before and after radiation therapy. This effect was most pronounced at completion of irradiation. On a molar basis, Diclofenac Na was most effective followed by Indomethacin, Meclofenamic acid, and lysin-monoacetylsalicylate.(ABSTRACT TRUNCATED AT 250 WORDS)

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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