Arginine deprivation, growth inhibition and tumour cell death: 2. Enzymatic degradation of arginine in normal and malignant cell cultures

R. Philip, E. Campbell, Denis Wheatley

    Research output: Contribution to journalArticle

    68 Citations (Scopus)

    Abstract

    Arginase added to culture medium reduced arginine to negligible levels within similar to6h, and enzyme activity persisted relatively undiminished for at least 3 days. Human and bovine arginase proved equally effective. The response of normal cells was to enter G I (GO) arrest, from which most of the cells could be recovered weeks later. In contrast, malignant cell lines treated with unpegylated or pegylated enzyme resulted in cell death on a massive scale within 3 - 5 days, with a very low to negligible percentage of cells (<0.01 %) being recoverable on restoration with arginine, Although pegylation resulted in a 40% drop in specific activity, arginase was considerably more stable and remained active for much greater than 8 days. Arginine decarboxylose caused malignant cell arrest at the same units per millilitre as arginase. Its breakdown product, agmatine, was relatively nontoxic in the presence of arginine, but exacerbated cell death above mlllimolar concentration in its absence. Although ornithine failed to rescue cells from deprivation, citrulline recovered cells in all cases, although less well in fast-growing tumour cell populations, whereas readdition of arginine failed to work unless a complete medium change was given (because of the persistence of the enzymes in the medium catabolis ng its destruction). The advantages and disadvantages of these two arginine-catabolising enzymes are discussed, and compared with orginine deiminase. (C) 2003 Cancer Research UK.

    Original languageEnglish
    Pages (from-to)613-623
    Number of pages10
    JournalBritish Journal of Cancer
    Volume88
    Issue number4
    DOIs
    Publication statusPublished - 2003

    Keywords

    • arginase
    • arginine decarboxylase
    • arginine
    • catabolism
    • deprivation
    • proliferation
    • cell death
    • citrulline
    • ornithine
    • agmatine
    • HeLa
    • L1210
    • cancer therapy
    • NITRIC-OXIDE SYNTHASE
    • POLYETHYLENE-GLYCOL
    • MYCOPLASMA-ARGININI
    • DEIMINASE
    • ARGINASE
    • PURIFICATION
    • RESTRICTION
    • AGMATINE
    • LEUKEMIA
    • ENZYMES

    Cite this

    Arginine deprivation, growth inhibition and tumour cell death: 2. Enzymatic degradation of arginine in normal and malignant cell cultures. / Philip, R.; Campbell, E.; Wheatley, Denis.

    In: British Journal of Cancer, Vol. 88, No. 4, 2003, p. 613-623.

    Research output: Contribution to journalArticle

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