TY - JOUR
T1 - The impact of enzastaurin (LY317615.HCl) on CA125 biosynthesis and shedding in ovarian cancer cells
AU - Cadron, Isabelle
AU - van Gorp, Toon
AU - Mihalyi, Attila
AU - Luyten, Catherina
AU - Drijkoningen, Katrien
AU - Amant, Frederic
AU - Leunen, Karin
AU - Vergote, Ignace
PY - 2010
Y1 - 2010
N2 - Background. In this study the modulatory effect of the proteinase kinase C beta (PKC beta) selective inhibitor enzastaurin on CA125 expression and shedding in ovarian cancer cells (OVCAR-3 cells) was investigated. Material and methods. OVCAR-3 cells were cultured in vitro and treated with increasing concentrations of carboplatin (2-1.000 mu M), paclitaxel (0.2-100 nM) or enzastaurin (1-100 mu M) single agent. Growth inhibitory effects were evaluated by MTS and luminescence assay. CA 125 was determined in supernatans and in cell lysate using an electrochemo-iluminescence immunoassay. Results. Cell growth of OVCAR-3 cells was inhibited by single agent carboplatin, paclitaxel or enzastaurin in a dose dependent manner. Carboplatin caused a transient increase of CA125 in supernatans followed by a gradual decrease of CA125. Treatment with increasing doses of paclitaxel or enzastaurin caused an increase of CA125 shedding in culture medium but also the membrane bound fraction of CA125 was increased. Conclusion. These results suggest that enzastaurin, as paclitaxel, has a direct stimulatory effect on CA 125 synthesis and shedding in vitro. (C) 2010 Elsevier Inc. All rights reserved
AB - Background. In this study the modulatory effect of the proteinase kinase C beta (PKC beta) selective inhibitor enzastaurin on CA125 expression and shedding in ovarian cancer cells (OVCAR-3 cells) was investigated. Material and methods. OVCAR-3 cells were cultured in vitro and treated with increasing concentrations of carboplatin (2-1.000 mu M), paclitaxel (0.2-100 nM) or enzastaurin (1-100 mu M) single agent. Growth inhibitory effects were evaluated by MTS and luminescence assay. CA 125 was determined in supernatans and in cell lysate using an electrochemo-iluminescence immunoassay. Results. Cell growth of OVCAR-3 cells was inhibited by single agent carboplatin, paclitaxel or enzastaurin in a dose dependent manner. Carboplatin caused a transient increase of CA125 in supernatans followed by a gradual decrease of CA125. Treatment with increasing doses of paclitaxel or enzastaurin caused an increase of CA125 shedding in culture medium but also the membrane bound fraction of CA125 was increased. Conclusion. These results suggest that enzastaurin, as paclitaxel, has a direct stimulatory effect on CA 125 synthesis and shedding in vitro. (C) 2010 Elsevier Inc. All rights reserved
U2 - https://doi.org/10.1016/j.ygyno.2010.03.008
DO - https://doi.org/10.1016/j.ygyno.2010.03.008
M3 - Article
C2 - 20439112
SN - 0090-8258
VL - 118
SP - 64
EP - 68
JO - Gynecologic Oncology
JF - Gynecologic Oncology
IS - 1
ER -