Cell Models for the Investigation of the Role of the Mucin MUC1 Extracellular Domain in Metastasizing

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The speculations on the role of MUC1, a substance which is overexpressed in glandular cancer cells, on the metastatic potential of such cells are rooted in data that seem to indicate that cell malignization correlates with a change from the apical localization of mucin MUC1 to a peripheral one. Nonetheless, the role of MUC1 in cancer metastasizing remains far from clear. The major hurdle remains the absence of adequate cell models. The aim of the present study was to create cell models that present different fragments of the human mucin MUC1 extracellular domain on their surface. Genetic constructions were generated on the basis of the plasmid vector pEGFP-N3. These constructions contain fusion genes coding for chimeric proteins composed of different combinations of mucin MUC1 functional domains and identification markers (FLAG-epitope, located at the N-terminus, and EGFP, located at the C-terminus of the chimeric proteins). These constructions were used for a stable transformation of HT-29 human cancer cells. The transformants obtained were characterized by flow cytometry. The low expression level of endogenous mucin MUC1 and the high expression level of recombinant proteins were confirmed by real-time PCR. The microscopic examination of the transformed cells confirmed the membrane localization of the fusion proteins. The resulting cell models could be used to investigate the role of the mucin MUC1 domains in cancer cell metastasizing. The obtained cells are used as an applicable model of MUC1-expressing cancers and might be used to study the role of different functional fragments of mucin MUC1 in metastasizing.

About the authors

M. S. Syrkina

Department of Molecular Biology, M.V. Lomonosov Moscow State University; A.N. Bach Institute of Biochemistry, Russian Academy of Science

Author for correspondence.
Email: krimsy@yandex.ru
Russian Federation

M. A. Rubtsov

Department of Molecular Biology, M.V. Lomonosov Moscow State University

Email: krimsy@yandex.ru
Russian Federation

D. M. Potashnikova

Department of Cell Biology and Histology, M.V. Lomonosov Moscow State University

Email: krimsy@yandex.ru
Russian Federation

Y. D. Kondratenko

Department of Molecular Biology, M.V. Lomonosov Moscow State University

Email: krimsy@yandex.ru
Russian Federation

A. A. Dokrunova

Bioengineering Department, M.V. Lomonosov Moscow State University

Email: krimsy@yandex.ru
Russian Federation

V. P. Veiko

A.N. Bach Institute of Biochemistry, Russian Academy of Science

Email: krimsy@yandex.ru
Russian Federation


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Copyright (c) 2014 Syrkina M.S., Rubtsov M.A., Potashnikova D.M., Kondratenko Y.D., Dokrunova A.A., Veiko V.P.

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