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Cancer-associated MUC1 mucin inhibits human T-cell proliferation, which is reversible by IL-2

Nature Medicinevolume 4pages4349 (1998) | Download Citation

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Abstract

A number of adenocarcinomas abundantly express and secrete underglycosylated MUC1 mucin. Underglycosylation exposes tandem repeat peptide sequences on cancer-associated MUC1 mucin that are normally cryptic. High levels of MUC1 mucin are correlated with a poor prognosis and immunosuppression in adenocarcinoma patients. In this report we show that cancer-associated MUC1 mucin, affinity-purified from ascites fluids of cancer patients, and synthetic tandem repeats of MUC1 mucin core peptide can suppress human T-cell proliferative responses. This MUC1 mucin-induced suppression of T-cell responses can be reversed by the addition of exogenous IL-2 or anti-CD28 monoclonal antibody. These results are consistent with other studies showing that lymphocytes present in the vicinity of tumor cells are anergic and can be reactivated with exogenous interleukin-2. Overcoming MUC1 mucin-induced immunosuppression with IL-2 combined with active specific immunotherapy might be an effective immunotherapeutic strategy against human adenocarcinomas.

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Author notes

  1. B. Michael Longenecker: Correspondence should be addressed to B.M.L

Affiliations

  1. Biomira, Inc., 2011-94 Street, Edmonton Research Park, Edmonton, AB, Canada, T6N 1H1

    • Babita Agrawal
    • , Mark J. Krantz
    • , Mark A. Reddish
    •  & B. Michael Longenecker

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https://doi.org/10.1038/nm0198-043

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