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Apolipoprotein E gene polymorphism influences aggressive behavior in prostate cancer cells by deregulating cholesterol homeostasis

  • Authors:
    • Godwin O. Ifere
    • Renee Desmond
    • Wendy Demark-Wahnefried
    • Tim R. Nagy
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  • Published online on: August 7, 2013     https://doi.org/10.3892/ijo.2013.2057
  • Pages: 1002-1010
  • Copyright: © Ifere et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].

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Abstract

High circulating cholesterol and its deregulated homeostasis may facilitate prostate cancer progression. Genetic polymorphism in Apolipoprotein (Apo) E, a key cholesterol regulatory protein may effect changes in systemic cholesterol levels. In this investigation, we determined whether variants of the Apo E gene can trigger defective intracellular cholesterol efflux, which could promote aggressive prostate cancer. ApoE genotypes of weakly (non-aggressive), moderate and highly tumorigenic (aggressive) prostate cancer cell lines were characterized, and we explored whether the ApoE variants were associated with tumor aggressiveness generated by intra­cellular cholesterol imbalance, using the expression of caveolin-1 (cav-1), a pro-malignancy surrogate of cholesterol overload. Restriction isotyping of ApoE isoforms revealed that the non-aggressive cell lines carried ApoE ε3/ε3 or ε3/ε4 alleles, while the aggressive cell lines carried the Apoε2/ε4 alleles. Our data suggest a contrast between the non-aggressive and the aggressive prostate cancer cell lines in the pattern of cholesterol efflux and cav-1 expression. Our exploratory results suggest a relationship between prostate aggressiveness, ApoE isoforms and cholesterol imbalance. Further investigation of this relationship may elucidate the molecular basis for considering cholesterol as a risk factor of aggressive prostate tumors, and underscore the potential of the dysfunctional ApoE2/E4 isoform as a biomarker of aggressive disease.
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October 2013
Volume 43 Issue 4

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Spandidos Publications style
Ifere GO, Desmond R, Demark-Wahnefried W and Nagy TR: Apolipoprotein E gene polymorphism influences aggressive behavior in prostate cancer cells by deregulating cholesterol homeostasis. Int J Oncol 43: 1002-1010, 2013.
APA
Ifere, G.O., Desmond, R., Demark-Wahnefried, W., & Nagy, T.R. (2013). Apolipoprotein E gene polymorphism influences aggressive behavior in prostate cancer cells by deregulating cholesterol homeostasis. International Journal of Oncology, 43, 1002-1010. https://doi.org/10.3892/ijo.2013.2057
MLA
Ifere, G. O., Desmond, R., Demark-Wahnefried, W., Nagy, T. R."Apolipoprotein E gene polymorphism influences aggressive behavior in prostate cancer cells by deregulating cholesterol homeostasis". International Journal of Oncology 43.4 (2013): 1002-1010.
Chicago
Ifere, G. O., Desmond, R., Demark-Wahnefried, W., Nagy, T. R."Apolipoprotein E gene polymorphism influences aggressive behavior in prostate cancer cells by deregulating cholesterol homeostasis". International Journal of Oncology 43, no. 4 (2013): 1002-1010. https://doi.org/10.3892/ijo.2013.2057