| Title | Paralemmin-1 is over-expressed in estrogen-receptor positive breast cancers. |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Turk, CM, Fagan-Solis, KD, Williams, KE, Gozgit, JM, Smith-Schneider, S, Marconi, SA, Otis, CN, Crisi, GM, Anderton, DL, Kilimann, MW, Arcaro, KF |
| Journal | Cancer cell international |
| Volume | 12 |
| Issue | 1 |
| Pagination | 17 |
| Date Published | 2012 |
| Abstract | UNLABELLED: ABSTRACT:
BACKGROUND: Paralemmin-1 is a phosphoprotein lipid-anchored to the cytoplasmic face of membranes where it functions in membrane dynamics, maintenance of cell shape, and process formation. Expression of paralemmin-1 and its major splice variant (Δ exon 8) as well as the extent of posttranslational modifications are tissue- and development-specific. Paralemmin-1 expression in normal breast and breast cancer tissue has not been described previously.
RESULTS: Paralemmin-1 mRNA and protein expression was evaluated in ten breast cell lines, 26 primary tumors, and 10 reduction mammoplasty (RM) tissues using real time RT-PCR. Paralemmin-1 splice variants were assessed in tumor and RM tissues using a series of primers and RT-PCR. Paralemmin-1 protein expression was examined in cell lines using Western Blots and in 31 ductal carcinomas in situ, 65 infiltrating ductal carcinomas, and 40 RM tissues using immunohistochemistry. Paralemmin-1 mRNA levels were higher in breast cancers than in RM tissue and estrogen receptor (ER)-positive tumors had higher transcript levels than ER-negative tumors. The Δ exon 8 splice variant was detected more frequently in tumor than in RM tissues. Protein expression was consistent with mRNA results showing higher paralemmin-1 expression in ER-positive tumors.
CONCLUSIONS: The differential expression of paralemmin-1 in a subset of breast cancers suggests the existence of variation in membrane dynamics that may be exploited to improve diagnosis or provide a therapeutic target. |
| Alternate Journal | Cancer Cell Int. |
Veterinary and Animal Sciences