Journal
JOURNAL OF CARBOHYDRATE CHEMISTRY
Volume 33, Issue 7-8, Pages 395-407Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/07328303.2014.933483
Keywords
Mannosamine; Metabolic engineering; Sialic acid; Analysis; Cancer; 1,2-Diamino-4,5-methylenedioxybenzene
Funding
- NIH/NCI [R01 CA95142]
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A convenient method was developed for the quantification of sialic acids expressed by cells and used to analyze the efficiency of N-phenylacetyl-D-mannosamine (ManNPhAc) to metabolically glycoengineer SKMEL-28 cancer cells. For this purpose, ManNPhAc-cultured cells were treated with 2M acetic acid to release sialic acids, and the products were treated with 1,2-diamino-4,5-methylenedioxybenzene to form the corresponding derivatives that had strong UV absorptions. The reaction mixture was then applied to HPLC-UV analysis to determine the amounts and the ratios of natural sialic acid and its unnatural analog. It was confirmed that after incubation with ManNPhAc, the SKMEL-28 cell was effectively glycoengineered to express a significant amount of unnatural sialic acid.
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