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Article

Estrogen-dependent expression and subcellular localization of the tight junction protein claudin-4 in HEC-1A endometrial cancer cells

  • Authors:
    • Maria E. Cuevas
    • Jenna M. Gaska
    • Andrea C. Gist
    • Jonathan M. King
    • Rebecca A. Sheller
    • Maria C. Todd
  • View Affiliations / Copyright

    Affiliations: Biology Department, Southwestern University, Georgetown, TX 78626, USA, Biology Department, Trinity University, San Antonio, TX 78212, USA
  • Pages: 650-656
    |
    Published online on: June 4, 2015
       https://doi.org/10.3892/ijo.2015.3030
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Abstract

Endometrial cancer is the most common female reproductive cancer in the United States and is associated with deregulated tight junction protein expression. Given the highly estrogen-responsive nature of this tissue, we investigated the effects of estrogen and its agonist, 4-OH TAM, on the expression and subcellular localization of the tight junction protein claudin-4 (CLDN-4), in HEC-1A endometrial cancer cells. In untreated HEC-1A cells, we observed dramatic overexpression of claudin-4 protein. In addition, differential detergent extraction analysis indicated that claudin-4 was localized primarily in the membrane but also found in the cytosolic, nuclear and cytoskeletal fractions. Upon exposure of HEC-1A to estradiol (E2), we observed a biphasic effect both on the overall expression of claudin-4 protein and on its cytosolic and cytoskeletal presence as demonstrated by immunoblot analysis. Immunofluorescence analysis also revealed a biphasic effect of E2 on claudin-4 expression. In contrast, we observed no changes in expression levels nor in the subcellular distribution patterns of claudin-4 in HEC-1A cells treated with different concentrations of 4-OH TAM. The intracellular presence of CLDN-4 coupled with the biphasic effects of E2 on CLDN-4 expression in the cytoskeleton suggest that this protein may be involved in cell signaling to and from TJs.
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Copy and paste a formatted citation
Spandidos Publications style
Cuevas ME, Gaska JM, Gist AC, King JM, Sheller RA and Todd MC: Estrogen-dependent expression and subcellular localization of the tight junction protein claudin-4 in HEC-1A endometrial cancer cells. Int J Oncol 47: 650-656, 2015.
APA
Cuevas, M.E., Gaska, J.M., Gist, A.C., King, J.M., Sheller, R.A., & Todd, M.C. (2015). Estrogen-dependent expression and subcellular localization of the tight junction protein claudin-4 in HEC-1A endometrial cancer cells. International Journal of Oncology, 47, 650-656. https://doi.org/10.3892/ijo.2015.3030
MLA
Cuevas, M. E., Gaska, J. M., Gist, A. C., King, J. M., Sheller, R. A., Todd, M. C."Estrogen-dependent expression and subcellular localization of the tight junction protein claudin-4 in HEC-1A endometrial cancer cells". International Journal of Oncology 47.2 (2015): 650-656.
Chicago
Cuevas, M. E., Gaska, J. M., Gist, A. C., King, J. M., Sheller, R. A., Todd, M. C."Estrogen-dependent expression and subcellular localization of the tight junction protein claudin-4 in HEC-1A endometrial cancer cells". International Journal of Oncology 47, no. 2 (2015): 650-656. https://doi.org/10.3892/ijo.2015.3030
Copy and paste a formatted citation
x
Spandidos Publications style
Cuevas ME, Gaska JM, Gist AC, King JM, Sheller RA and Todd MC: Estrogen-dependent expression and subcellular localization of the tight junction protein claudin-4 in HEC-1A endometrial cancer cells. Int J Oncol 47: 650-656, 2015.
APA
Cuevas, M.E., Gaska, J.M., Gist, A.C., King, J.M., Sheller, R.A., & Todd, M.C. (2015). Estrogen-dependent expression and subcellular localization of the tight junction protein claudin-4 in HEC-1A endometrial cancer cells. International Journal of Oncology, 47, 650-656. https://doi.org/10.3892/ijo.2015.3030
MLA
Cuevas, M. E., Gaska, J. M., Gist, A. C., King, J. M., Sheller, R. A., Todd, M. C."Estrogen-dependent expression and subcellular localization of the tight junction protein claudin-4 in HEC-1A endometrial cancer cells". International Journal of Oncology 47.2 (2015): 650-656.
Chicago
Cuevas, M. E., Gaska, J. M., Gist, A. C., King, J. M., Sheller, R. A., Todd, M. C."Estrogen-dependent expression and subcellular localization of the tight junction protein claudin-4 in HEC-1A endometrial cancer cells". International Journal of Oncology 47, no. 2 (2015): 650-656. https://doi.org/10.3892/ijo.2015.3030
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