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Claire Henry, Neville Hacker, Caroline Ford
OBJECTIVE: Elevated expression of the ROR1 and ROR2 Wnt receptors has been noted in both the tumour and stromal compartments of ovarian cancer patient tissue samples. In vitro studies have suggested these receptors play a role in ovarian cancer metastasis. However, these previous studies have utilised simple 2D in vitro models to investigate cancer cell growth and migration, which does not allow investigation of stromal involvement in Wnt driven metastasis. AIM: To investigate targeting ROR1 and ROR2 using a primary co-culture 3D model of epithelial ovarian cancer dissemination to the omentum...
December 22, 2017: Oncotarget
Jin Wang, Bertrand Z Yeung, Minjian Cui, Cody J Peer, Ze Lu, William D Figg, M Guillaume Wientjes, Sukyung Woo, Jessie L-S Au
PURPOSE: Exosomes are small membrane vesicles (30-100nm in diameter) secreted by cells into extracellular space. The present study evaluated the effect of chemotherapeutic agents on exosome production and/or release, and quantified the contribution of exosomes to intercellular drug transfer and pharmacodynamics. METHODS: Human cancer cells (breast MCF7, breast-to-lung metastatic LM2, ovarian A2780 and OVCAR4) were treated with paclitaxel (PTX, 2-1000nM) or doxorubicin (DOX, 20-1000nM) for 24-48h...
December 28, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
Matthew Dean, David A Davis, Joanna E Burdette
Factors that stimulate the migration of fallopian tube epithelial (FTE)-derived high-grade serous ovarian cancer (HGSOC) to the ovary are poorly elucidated. This study characterized the effect of the ovarian hormone, activin A, on normal FTE and HGSOC. Activin A and TGFβ1 induced an epithelial-to-mesenchymal transition in murine oviductal epithelial (MOE) cells, but only activin A increased migration. The migratory effect of activin A was independent of Smad2/3 and required phospho-AKT, phospho-ERK, and Rac1...
April 10, 2017: Cancer Letters
James Haley, Sunil Tomar, Nicholas Pulliam, Sen Xiong, Susan M Perkins, Adam R Karpf, Sumegha Mitra, Kenneth P Nephew, Anirban K Mitra
Genomic analysis of ovarian cancer cell lines has revealed a panel that best represents the most common ovarian cancer subtype, high-grade serous ovarian cancer (HGSOC). However, these HGSOC-like cell lines have not been extensively applied by ovarian cancer researchers to date, and the most commonly used cell lines in the ovarian cancer field do not genetically resemble the major clinical type of the disease. For the HGSOC-like lines to serve as suitable models, they need to be characterized for common functional assays...
May 31, 2016: Oncotarget
Yinghong Pan, Gordon Robertson, Lykke Pedersen, Emilia Lim, Anadulce Hernandez-Herrera, Amy C Rowat, Sagar L Patil, Clara K Chan, Yunfei Wen, Xinna Zhang, Upal Basu-Roy, Alka Mansukhani, Andy Chu, Payal Sipahimalani, Reanne Bowlby, Denise Brooks, Nina Thiessen, Cristian Coarfa, Yussanne Ma, Richard A Moore, Jacquie E Schein, Andrew J Mungall, Jinsong Liu, Chad V Pecot, Anil K Sood, Steven J M Jones, Marco A Marra, Preethi H Gunaratne
Ovarian cancer presents as an aggressive, advanced stage cancer with widespread metastases that depend primarily on multicellular spheroids in the peritoneal fluid. To identify new druggable pathways related to metastatic progression and spheroid formation, we integrated microRNA and mRNA sequencing data from 293 tumors from The Cancer Genome Atlas (TCGA) ovarian cancer cohort. We identified miR-509-3p as a clinically significant microRNA that is more abundant in patients with favorable survival in both the TCGA cohort (P = 2...
May 3, 2016: Oncotarget
Georgette Moyle-Heyrman, Matthew J Schipma, Matthew Dean, David A Davis, Joanna E Burdette
BACKGROUND: The fallopian tube epithelium is one of the potential sources of high-grade serous ovarian cancer (HGSC). The use of estrogen only hormone replacement therapy increases ovarian cancer (OVCA) risk. Despite estrogen's influence in OVCA, selective estrogen receptor modulators (SERMs) typically demonstrate only a 20 % response rate. This low response could be due to a variety of factors including the loss of estrogen receptor signaling or the role of estrogen in different potential cell types of origin...
February 15, 2016: Journal of Ovarian Research
Danielle L Bourgeois, Karl A Kabarowski, Veronica L Porubsky, Pamela K Kreeger
BACKGROUND: The factors driving the onset and progression of ovarian cancer are not well understood. Recent reports have identified cell lines that are representative of the genomic pattern of high-grade serous ovarian cancer (HGSOC), in which greater than 90 % of tumors have a mutation in TP53. However, many of these representative cell lines have not been widely used so it is unclear if these cell lines capture the variability that is characteristic of the disease. METHODS: We investigated six TP53-mutant HGSOC cell lines (Caov3, Caov4, OV90, OVCA432, OVCAR3, and OVCAR4) for migration, MMP2 expression, proliferation, and VEGF secretion, behaviors that play critical roles in tumor progression...
2015: Cancer Cell International
Xin Qiu, Jung-Chien Cheng, Jianfang Zhao, Hsun-Ming Chang, Peter C K Leung
Reduced connexin43 (Cx43) expression is frequently detected in different types of human cancer. Cx43 has been shown to regulate cancer cell migration in a cell-type dependent manner. In both primary and recurrent human ovarian cancer, overexpression of TGF-β ligand and its receptors have been detected. TGF-β can regulate Cx43 expression in other cell types and stimulate human ovarian cancer cell migration. However, whether Cx43 can be regulated by TGF-β and is involved in TGF-β-stimulated cell migration in human ovarian cancer cells remain unknown...
October 2015: Cellular Signalling
Anirban K Mitra, David A Davis, Sunil Tomar, Lynn Roy, Hilal Gurler, Jia Xie, Daniel D Lantvit, Horacio Cardenas, Fang Fang, Yueying Liu, Elizabeth Loughran, Jing Yang, M Sharon Stack, Robert E Emerson, Karen D Cowden Dahl, Maria V Barbolina, Kenneth P Nephew, Daniela Matei, Joanna E Burdette
OBJECTIVE: Genomic studies of ovarian cancer (OC) cell lines frequently used in research revealed that these cells do not fully represent high-grade serous ovarian cancer (HGSOC), the most common OC histologic type. However, OC lines that appear to genomically resemble HGSOC have not been extensively used and their growth characteristics in murine xenografts are essentially unknown. METHODS: To better understand growth patterns and characteristics of HGSOC cell lines in vivo, CAOV3, COV362, KURAMOCHI, NIH-OVCAR3, OVCAR4, OVCAR5, OVCAR8, OVSAHO, OVKATE, SNU119 and UWB1...
August 2015: Gynecologic Oncology
Xin Qiu, Jung-Chien Cheng, Christian Klausen, Hsun-Ming Chang, Qianlan Fan, Peter C K Leung
Connexin43 (Cx43) has been shown to regulate cell proliferation and its downregulation is correlated with poor prognosis and survival in several types of human cancer. Cx43 expression levels are frequently downregulated in human ovarian cancer, suggesting a potential role for Cx43 in regulating the progression of this disease. Epidermal growth factor (EGF) is a well-characterized hormone that stimulates ovarian cancer cell proliferation. Although EGF is able to regulate Cx43 expression in other cell types, it is unclear whether EGF can regulate Cx43 expression in ovarian cancer cells...
January 2016: Journal of Cellular Physiology
Daisuke Asanuma, Masayo Sakabe, Mako Kamiya, Kyoko Yamamoto, Jun Hiratake, Mikako Ogawa, Nobuyuki Kosaka, Peter L Choyke, Tetsuo Nagano, Hisataka Kobayashi, Yasuteru Urano
Fluorescence-guided diagnostics is one of the most promising approaches for facile detection of cancer in situ. Here we focus on β-galactosidase, which is overexpressed in primary ovarian cancers, as a molecular target for visualizing peritoneal metastases from ovarian cancers. As existing fluorescence probes are unsuitable, we have designed membrane-permeable HMRef-βGal, in which the optimized intramolecular spirocyclic function affords >1,400-fold fluorescence enhancement on activation. We confirm that HMRef-βGal sensitively detects intracellular β-galactosidase activity in several ovarian cancer lines...
2015: Nature Communications
Yong-Hui Ding, Zhi-Wei Zhou, Chun-Fang Ha, Xue-Yu Zhang, Shu-Ting Pan, Zhi-Xu He, Jeffrey L Edelman, Dong Wang, Yin-Xue Yang, Xueji Zhang, Wei Duan, Tianxin Yang, Jia-Xuan Qiu, Shu-Feng Zhou
Ovarian cancer is a leading killer of women, and no cure for advanced ovarian cancer is available. Alisertib (ALS), a selective Aurora kinase A (AURKA) inhibitor, has shown potent anticancer effects, and is under clinical investigation for the treatment of advanced solid tumor and hematologic malignancies. However, the role of ALS in the treatment of ovarian cancer remains unclear. This study investigated the effects of ALS on cell growth, apoptosis, autophagy, and epithelial to mesenchymal transition (EMT), and the underlying mechanisms in human epithelial ovarian cancer SKOV3 and OVCAR4 cells...
2015: Drug Design, Development and Therapy
Qianlan Fan, Jung-Chien Cheng, Xin Qiu, Hsun-Ming Chang, Peter C K Leung
Although epithelial cell adhesion molecule (EpCAM) is overexpressed in human epithelial ovarian cancer (EOC), some contradictory results have been reported regarding the correlation between EpCAM overexpression and patient survival. In addition to this controversy, the function and regulation of EpCAM in EOC remain largely unknown. Here, we show that epidermal growth factor (EGF) up-regulates EpCAM expression by activating ERK1/2 signaling in a human EOC cell line, SKOV3. Additionally, EpCAM overexpression suppresses not only basal but also EGF-stimulated SKOV3 cell migration, whereas EpCAM knockdown increases both basal and EGF-stimulated cell migration in another human EOC cell line, OVCAR4...
February 13, 2015: Biochemical and Biophysical Research Communications
Mark Desjardins, Jia Xie, Hilal Gurler, Goda G Muralidhar, Joelle D Sacks, Joanna E Burdette, Maria V Barbolina
BACKGROUND: Epithelial ovarian carcinoma is a deadly disease characterized by overt peritoneal metastasis. Individual cells and multicellular aggregates, or spheroids, seed these metastases, both commonly found in ascites. Mechanisms that foster spheroid attachment to the peritoneal tissues preceding formation of secondary lesions are largely unknown. METHODS: Cell culture models of SKOV-3, OVCAR3, OVCAR4, Caov-3, IGROV-1, and A2780 were used. In this report the role of versican was examined in adhesion of EOC spheroids and cells to peritoneal mesothelial cell monolayers in vitro as well as in formation of peritoneal tumors using an in vivo xenograft mouse model...
2014: Journal of Ovarian Research
Shailendra Giri, Ramandeep Rattan, Mandar Deshpande, Jacie L Maguire, Zachary Johnson, Rondell P Graham, Viji Shridhar
This study examines the role of s-nitrosylation in the growth of ovarian cancer using cell culture based and in vivo approaches. Using the nitrosylating agent, S-nitrosoglutathione (GSNO), a physiological nitric oxide molecule, we show that GSNO treatment inhibited proliferation of chemoresponsive and chemoresistant ovarian cancer cell lines (A2780, C200, SKVO3, ID8, OVCAR3, OVCAR4, OVCAR5, OVCAR7, OVCAR8, OVCAR10, PE01 and PE04) in a dose dependent manner. GSNO treatment abrogated growth factor (HB-EGF) induced signal transduction including phosphorylation of Akt, p42/44 and STAT3, which are known to play critical roles in ovarian cancer growth and progression...
2014: PloS One
Ning Chen, Hye Sook Chon, Yin Xiong, Douglas C Marchion, Patricia L Judson, Ardeshir Hakam, Jesus Gonzalez-Bosquet, Jennifer Permuth-Wey, Robert M Wenham, Sachin M Apte, Jin Q Cheng, Thomas A Sellers, Johnathan M Lancaster
Paclitaxel is a mainstay of treatment for many solid tumors, and frequently, clinical outcome is influenced by paclitaxel sensitivity. Despite this, our understanding of the molecular basis of paclitaxel response is incomplete. Recently, it has been shown that microRNAs (miRNAs) influence messenger RNA (mRNA) transcriptional control and can contribute to human carcinogenesis. In the present study, our objective was to identify miRNAs associated with cancer cell line response to paclitaxel and to evaluate these miRNAs as therapeutic targets to increase paclitaxel sensitivity...
January 2014: Oncology Reports
Jing Hu, Hassan Nakhla, Eileen Friedman
Some ovarian cancer cells in vivo are in a reversible quiescent state where they can contribute to cancer spread under favorable growth conditions. The serine/threonine kinase Mirk/dyrk1B was expressed in each of seven ovarian cancer cell lines and in 21 of 28 resected human ovarian cancers, and upregulated in 60% of the cancers. Some ovarian cancer cells were found in a G0 quiescent state, with the highest fraction in a line with an amplified Mirk gene. Suboptimal culture conditions increased the G0 fraction in SKOV3 and TOV21G, but not OVCAR4 cultures...
July 15, 2011: International Journal of Cancer. Journal International du Cancer
Siddharth G Kamath, Ning Chen, Yin Xiong, Robert Wenham, Sachin Apte, Marcia Humphrey, Janiel Cragun, Johnathan M Lancaster
The discovery of more active therapeutic compounds is essential if the outcome for patients with advanced-stage epithelial ovarian cancer is to be improved. Gedunin, an extract of the neem tree, has been used as a natural remedy for centuries in Asia. Recently, gedunin has been shown to have potential in vitro antineoplastic properties; however, its effect on ovarian cancer cells is unknown. We evaluated the in vitro effect of gedunin on SKOV3, OVCAR4, and OVCAR8 ovarian cancer cell lines proliferation, alone and in the presence of cisplatin...
December 2009: International Journal of Gynecological Cancer
Seiji Mabuchi, Deborah A Altomare, Mitchell Cheung, Lili Zhang, Poulikos I Poulikakos, Harvey H Hensley, Russell J Schilder, Robert F Ozols, Joseph R Testa
PURPOSE: mTOR (mammalian target of rapamycin) plays a central role in regulating cell growth and cell cycle progression and is regarded as a promising therapeutic target. We examined whether mTOR inhibition by RAD001 (everolimus) is therapeutically efficacious in the treatment of ovarian cancer as a single agent and in combination with cisplatin. EXPERIMENTAL DESIGN: Using four human ovarian cancer cell lines, we determined the effect of RAD001 by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, Western blot, and apoptosis assays...
July 15, 2007: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
Deborah A Altomare, Hui Qin Wang, Kristine L Skele, Assunta De Rienzo, Andres J Klein-Szanto, Andrew K Godwin, Joseph R Testa
Activation of the PI3K/AKT pathway may contribute to tumorigenesis. AKT mediates survival signals that protect cells from apoptosis and, thus, is a potentially important therapeutic target. To determine the frequency of AKT activation in human ovarian cancer, we screened a tumor tissue microarray with a phospho-specific pan-AKT (Ser473) antibody, which revealed elevated staining in 21 of 31 (68%) ovarian carcinomas. Phospho-AKT staining was associated with that of phospho (active)-mTOR in 27 of 31 (87%) ovarian tumors, with 17 (55%) tumors showing elevated phospho-mTOR positivity...
July 29, 2004: Oncogene
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