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Cloning and Expression of Mammaglobin Gene  

이재학 (서일대학 식품영양과)
Publication Information
The Korean Journal of Food And Nutrition / v.17, no.1, 2004 , pp. 47-52 More about this Journal
Abstract
In this study, I attempted to develope the expression and purification system of human mammaglobin proteins in Escherichia coli and to produce anti-human mammaglobin rabbit antibody for the detection of human mammaglobin protein in the peripheral blood of breast cancer patients. Human mammaglobin gene was cloned and sequenced from m-RNAs purified from donated breast cancer tissues using RT-PCR. The cloned gene was inserted into pET30, pET22, and pET32 plasmid. The cloned gene in pET30 yields insoluble proteins which was difficult to purify from the cells extracts. The mammaglobin gene in pET32 was strongly expressed soluble proteins which were isolated using Ni-NTA affinity chromagraphy and DEAE-ion exchange chromatography, followed by enterokinase digestion of the purified proteins. The isolated proteins had enough purity to use as a antigen for the production of anti-mammaglobin antibody in rabbits. The polyclonal antibody produced against the isolated mammaglobin showed a specificity to mammaglobin after Westernblot immuno assay. In conclusion, the isolated mammaglobin protein and the anti-mammaglobin rabbit antibody may be used for diagnosis of breast cancer as well as development of anti-breast cancer drug.
Keywords
mammaglobin; breast cancer; diagnosis; expression;
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