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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Mechanism of sensitivity of cultured pancreatic carcinoma to asparaginase.

The effects of E. coli L-asparaginase on cultured human pancreatic carcinoma ( MIA PaCa-2) have been studied. The enzyme (1 U/ml) inhibited growth and protein synthesis in both MIA PaCa-2 and PANC-1, another pancreatic carcinoma cell line, but had little or no effect on human breast carcinoma or melanoma cells. The inhibition of protein synthesis by E. coli L-asparaginase was largely reversed by L-glutamine but not by L-asparagine. The growth of both MIA PaCa-2 and PANC-1 showed absolute dependence on L-glutamine. These results indicate that the effect of E. coli L-asparaginase on cultured pancreatic carcinoma cells is exerted at least in part through its L-glutaminase activity. Although the addition of L-glutamine to the culture appeared to prevent cell death caused by L-asparaginase, it did not restore the ability of the cells to proliferate. Asparaginase derived from vibrio succinogenes, which is virtually free of L-glutaminase activity, was equally inhibitory to MIA PaCa-2 cell growth but did not affect protein synthesis. It is concluded that the inhibition of growth of cultured pancreatic carcinoma cells by E. coli asparaginase is a combined function of both its L-asparaginase and L-glutaminase activity.[1]

References

  1. Mechanism of sensitivity of cultured pancreatic carcinoma to asparaginase. Wu, M.C., Arimura, G.K., Yunis, A.A. Int. J. Cancer (1978) [Pubmed]
 
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