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Chemotherapy resistance ovarian carcinoma

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https://www.readbyqxmd.com/read/28816710/establishment-of-primary-cell-culture-from-ascitic-fluid-and-solid-tumor-obtained-from-epithelial-ovarian-carcinoma-patients
#1
Rajarshi Kar, Diwesh Chawla, Bindiya Gupta, Mohit Mehndiratta, Neelam Wadhwa, Rachna Agarwal
OBJECTIVE: Ovarian cancer is the seventh leading cause of cancer death worldwide. This is mainly due to late diagnosis and high rate of relapse and resistance following chemotherapy. In the present study, we describe simple and cost-effective method to establish primary culture from ascitic fluid and solid tumor obtained from epithelial ovarian carcinoma patient, which may provide a better tool for in vitro testing of drug sensitivity and designing individualized treatment protocol. METHODS: Complete Dulbecco modified Eagle medium (DMEM) was prepared by supplementing DMEM with 10% fetal bovine serum and antibiotics (ciprofloxacin and amphotericin B)...
August 16, 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28800469/immunotherapy-in-ovarian-endometrial-and-cervical-cancer-state-of-the-art-and-future-perspectives
#2
REVIEW
Jole Ventriglia, Immacolata Paciolla, Carmela Pisano, Sabrina Chiara Cecere, Marilena Di Napoli, Rosa Tambaro, Daniela Califano, Simona Losito, Giosuè Scognamiglio, Sergio Venanzio Setola, Laura Arenare, Sandro Pignata, Chiara Della Pepa
The tumors of the female genital tract represent a leading cause of morbidity and mortality among women worldwide. Substantial progresses have been made in ovarian cancer, with the increasing knowledge about BRCA mutated tumors and the recent development of PARP inhibitors, and in cervical cancer, thanks to extensive screening and widespread of vaccination against Human Papilloma Virus. Nevertheless many needs remain unmet, advanced stage diseases are still incurable and cervical and endometrial carcinoma, as well as platinum-resistant ovarian carcinoma, can certainly be classifiable among the cancers with poor sensitivity to conventional chemotherapy...
July 31, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28791369/cepharanthine-hydrochloride-reverses-p%C3%A2-glycoprotein-mediated-multidrug-resistance-in-human-ovarian-carcinoma-a2780-taxol-cells-by-inhibiting-the-pi3k-akt-signaling-pathway
#3
Chen-Zheng Huang, Ya-Feng Wang, Yan Zhang, You-Mei Peng, Yi-Xian Liu, Fang Ma, Jin-Hua Jiang, Qing-Duan Wang
Ovarian cancer has the highest mortality rate among gynecologic malignant tumors. The major obstacle to treatment success is multidrug resistance (MDR) to chemotherapy drugs. Cepharanthine hydrochloride (CH), a natural alkaloid-derived compound, has shown MDR reversal potency in several tumor cell lines; however, the molecular mechanism is not entirely known. In the present study, we assessed whether CH sensitized malignant cells to chemotherapy drugs in ovarian cancer and explored the relevant mechanism. We found that CH reduced the IC50 value of paclitaxel and increased intracellular rhodamine-123 accumulation in human ovarian cancer A2780/Taxol cells in a concentration-dependent manner...
August 4, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28772202/the-role-of-surgical-excision-for-the-krukenberg-tumour-a-case-report
#4
David Lam, Eugene Ong
INTRODUCTION: Krukenberg tumour (KT), which represents carcinoma in the ovary, is an uncommon manifestation of metastatic colorectal cancer. It is associated with poor prognosis and a high incidence of peritoneal metastatic disease. PRESENTATION OF CASE: The authors present a case of a 51-year-old female who had a symptomatic, metachronous right ovarian KT diagnosed 12 months after her initial resection. Surgery was performed to excise the 23cm tumour as well as the contralateral ovary and isolated peritoneal disease, with an R0 resection achieved...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28767420/ccne1-expression-in-high-grade-serous-carcinoma-does-not-correlate-with-chemoresistance
#5
Stav Sapoznik, Sarit Aviel-Ronen, Keren Bahar-Shany, Oranit Zadok, Keren Levanon
Delayed diagnosis of ovarian cancer, as well as high recurrence rates and lack of personalized therapy options, are among the causes for poor survival figures. Much effort is made towards developing new therapeutic possibilities, however predictive biomarkers are still unavailable. CCNE1 amplification, occurring in ~20% of the high grade serous ovarian tumors, was previously proposed as a marker for platinum resistance and poor prognosis as well as for CDK2 inhibition. The current study aimed to examine the role of CCNE1 positive-immunostain as a predictor of first-line taxane-platinum chemoresistance...
July 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28758939/stonin-2-overexpression-is-correlated-with-unfavorable-prognosis-and-tumor-invasion-in-epithelial-ovarian-cancer
#6
Xiaoying Sun, Weijing Zhang, Han Li, Chunhao Niu, Yulan Ou, Libing Song, Yanna Zhang
Stonin 2 (STON2), which functions in adjusting endocytotic complexes, is probably involved in the monitoring of the internalization of dopamine D2 receptors which have an inhibitory action of dopamine on tumor progression. However, its clinical significance in tumor progression and prognosis remains unclear. We explored the association between STON2 and the clinicopathological characteristics of epithelial ovarian cancer (EOC). The STON2 levels in ovarian cancer and normal cell lines and tissues were detected by real-time PCR and Western blot analyses...
July 29, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28752845/mismatch-repair-status-and-pd-l1-expression-in-clear-cell-carcinomas-of-the-ovary-and-endometrium
#7
Brian C Willis, Emily A Sloan, Kristen A Atkins, Mark H Stoler, Anne M Mills
Clear cell carcinoma represents a distinct histologic type of müllerian carcinoma that is resistant to conventional chemotherapy. Expression of programmed cell death ligand (PD-L1) has been associated with immune evasion in numerous tumor types and may be used to identify patients who will benefit from targeted immunotherapy, particularly in the setting of mismatch repair defects. We evaluated PD-L1 expression in 23 ovarian clear cell carcinomas and 21 endometrial clear cell carcinomas, and correlated expression with mismatch repair status...
July 28, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28728166/whole-genome-sequencing-revealed-novel-prognostic-biomarkers-and-promising-targets-for-therapy-of-ovarian-clear-cell-carcinoma
#8
Hiroaki Itamochi, Tetsuro Oishi, Nao Oumi, Satoshi Takeuchi, Kosuke Yoshihara, Mikio Mikami, Nobuo Yaegashi, Yasuhisa Terao, Kazuhiro Takehara, Kimio Ushijima, Hidemichi Watari, Daisuke Aoki, Tadashi Kimura, Toshiaki Nakamura, Yoshihito Yokoyama, Junzo Kigawa, Toru Sugiyama
BACKGROUND: Ovarian clear cell carcinoma (OCCC) is mostly resistant to standard chemotherapy that results in poor patient survival. To understand the genetic background of these tumours, we performed whole-genome sequencing of OCCC tumours. METHODS: Tumour tissue samples and matched blood samples were obtained from 55 Japanese women diagnosed with OCCC. Whole-genome sequencing was performed using the Illumina HiSeq platform according to standard protocols. RESULTS: Alterations to the switch/sucrose non-fermentable (SWI/SNF) subunit, the phosphatidylinositol-3-kinase (PI3K)/Akt signalling pathway, and the receptor tyrosine kinase (RTK)/Ras signalling pathway were found in 51%, 42%, and 29% of OCCC tumours, respectively...
July 20, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28705408/superior-in-vitro-and-in-vivo-activity-of-trastuzumab-emtansine-t-dm1-in-comparison-to-trastuzumab-pertuzumab-and-their-combination-in-epithelial-ovarian-carcinoma-with-high-her2-neu-expression
#9
Gulden Menderes, Elena Bonazzoli, Stefania Bellone, Gary Altwerger, Jonathan D Black, Katherine Dugan, Francesca Pettinella, Alice Masserdotti, Francesco Riccio, Anna Bianchi, Luca Zammataro, Christopher de Haydu, Natalia Buza, Pei Hui, Serena Wong, Gloria S Huang, Babak Litkouhi, Elena Ratner, Dan-Arin Silasi, Masoud Azodi, Peter E Schwartz, Alessandro D Santin
BACKGROUND: Epithelial ovarian cancer (EOC) remains the most lethal gynecologic malignancy. The objective of this study was to compare the anti-tumor activity of HER2/neu-targeting monoclonal antibodies, trastuzumab (T), pertuzumab (P), combination of trastuzumab and pertuzumab (T+P) and trastuzumab-emtansine (T-DM1) in EOC with high HER2/neu expression. METHODS: Primary EOC cell lines were established and cell blocks were analyzed for HER2/neu expression. Cytostatic, apoptotic and antibody-dependent cell-mediated cytotoxicity (ADCC) activities of T, P, T+P and T-DM1 were evaluated in vitro...
July 10, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28666422/the-role-of-hormonal-therapy-in-patients-with-relapsed-high-grade-ovarian-carcinoma-a-retrospective-series-of-tamoxifen-and-letrozole
#10
Angela George, Jennifer McLachlan, Nina Tunariu, Chiara Della Pepa, Cristina Migali, Martin Gore, Stan Kaye, Susana Banerjee
BACKGROUND: Hormonal therapy is used as a treatment option in high-grade ovarian carcinoma (HGOC), but the role and choice of treatment remains unclear. Agents used include tamoxifen and aromatase inhibitors. Our aim was to evaluate the efficacy of tamoxifen (T) and letrozole (L) in HGOC in clinical practice and investigate factors influencing clinical outcome. METHODS: A retrospective review of patients with relapsed HGOC treated with either tamoxifen or letrozole at the Royal Marsden Hospital between 2007 and 2012 was performed...
June 30, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28646535/targeting-stat3-by-ho3867-induces-apoptosis-in-ovarian-clear-cell-carcinoma
#11
Kristin Bixel, Uksha Saini, Hemant Kumar Bid, John Fowler, Maria Riley, Ross Wanner, Kalpana Deepa Priya Dorayappan, Sneha Rajendran, Ikuo Konishi, Noriomi Matsumura, David E Cohn, Karuppaiyah Selvendiran
Advanced ovarian clear cell carcinoma (OCCC) carries a very poor prognosis in large part secondary to the extremely high rate of resistance to standard platinum and taxane chemotherapy. Signal transducer and activator of transcription 3(STAT3) expression and activation has been shown to regulate tumor progression in various human cancers, though has not been well studied in OCCC. Preliminary work in our lab has demonstrated constitutive activation of STAT3 (pSTAT3Tyr705 or pSTAT3727) in OCCC cell lines as well as human OCCC tumor tissue samples...
June 24, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28619062/platinum-containing-compound-platinum-pyrithione-suppresses-ovarian-tumor-proliferation-through-proteasome-inhibition
#12
Hongbiao Huang, Ni Liu, Yuning Liao, Ningning Liu, Jianyu Cai, Xiaohong Xia, Zhiqiang Guo, Yanling Li, Qirong Wen, Qi Yin, Yan Liu, Qingxia Wu, Dhivya Rajakumar, Xiujie Sheng, Jinbao Liu
BACKGROUND: Ovarian carcinoma is one of the most aggressive gynecological malignant neoplasms and makes up 25-30% of all cancer cases of the female genital tract. Currently, resistance to traditional chemotherapy is a great challenge for patients with Epithelial ovarian cancer (EOC). Therefore, identifying novel agents for EOC treatment is essential and urgent. METHOD: MTS assay was used to analyze the cell viability and proliferation of cancer cells. Flow cytometry was employed to analyze cell cycle distribution and cell apoptosis...
June 15, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28588062/secondary-somatic-mutations-restoring-rad51c-and-rad51d-associated-with-acquired-resistance-to-the-parp-inhibitor-rucaparib-in-high-grade-ovarian-carcinoma
#13
Olga Kondrashova, Minh Nguyen, Kristy Shield-Artin, Anna V Tinker, Nelson N H Teng, Maria I Harrell, Michael J Kuiper, Gwo-Yaw Ho, Holly Barker, Maria Jasin, Rohit Prakash, Elizabeth M Kass, Meghan R Sullivan, Gregory J Brunette, Kara A Bernstein, Robert L Coleman, Anne Floquet, Michael Friedlander, Ganessan Kichenadasse, David M O'Malley, Amit M Oza, James X Sun, Liliane Robillard, Lara Maloney, David D L Bowtell, Heidi Giordano, Matthew J Wakefield, Scott H Kaufmann, Andrew D Simmons, Thomas C Harding, Mitch Raponi, Iain A McNeish, Elizabeth M Swisher, Kevin Lin, Clare L Scott
High-grade epithelial ovarian carcinomas (OC) containing mutated BRCA1 or BRCA2 (BRCA1/2) homologous recombination (HR) genes are sensitive to platinum-based chemotherapy and poly(ADP-ribose) polymerase inhibitors (PARPi), while restoration of HR function due to secondary mutations in BRCA1/2 has been recognized as an important resistance mechanism. We sequenced core HR pathway genes in 12 pairs of pre-treatment and post-progression tumor biopsy samples collected from patients in ARIEL2 Part 1, a phase 2 study of the PARPi rucaparib as treatment for platinum-sensitive, relapsed OC...
June 6, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28498842/prognostic-significance-and-predictors-of-the-system-inflammation-score-in-ovarian-clear-cell-carcinoma
#14
Hongwei Zhang, Jiaqi Lu, Yingying Lu, Jiayi Zhou, Zehua Wang, Haiou Liu, Congjian Xu
Chronic inflammation is a well-known epidemiologic factor of ovarian clear cell carcinomas (OCCC), but has an uncertain role in prognosis. We developed a systemic inflammation score (SIS) based on preoperative serum albumin and neutrophil-to-lymphocyte ratio (NLR) for predicting progression-free survival (PFS) and overall survival (OS) in OCCC patients. A retrospective review was performed in 155 patients with OCCC undergoing primary debulking and chemotherapy at a single institute between 1995 and 2010. Cox regression models were fitted to analyze the effect of prognostic factors on PFS and OS...
2017: PloS One
https://www.readbyqxmd.com/read/28481779/claudin-4-expression-is-associated-with-survival-in-ovarian-cancer-but-not-with-chemotherapy-response
#15
Laura Martín de la Fuente, Susanne Malander, Linda Hartman, Jenny-Maria Jönsson, Anna Ebbesson, Mef Nilbert, Anna Måsbäck, Ingrid Hedenfalk
The tight junction protein claudin-4 has been reported to be overexpressed in advanced ovarian cancer. We investigated the prognostic significance of claudin-4 overexpression and whether claudin-4 expression could predict platinum response in primary ovarian carcinoma (OC). Claudin-4 expression was evaluated by immunohistochemistry in a tissue microarray of 140 OCs. Multivariable Cox-regression models were used to assess the effect of claudin-4 overexpression on progression-free survival and overall survival (OS)...
May 5, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28477068/the-role-of-mir-130a-in-cancer
#16
REVIEW
He-da Zhang, Lin-Hong Jiang, Da-Wei Sun, Jian Li, Zhen-Ling Ji
MicroRNAs (miRs) are short and highly conserved non-coding RNAs molecules consisting of 18-25 nucleotides that regulate gene expression at post-transcriptional level by direct binding to complementary binding sites within the 3'untranslated region (3'UTR) of target mRNAs. New evidences have demonstrated that miRNAs play an important role in diverse physiological processes, including regulating cell growth, apoptosis, metastasis, drug resistance, and invasion. In chromosomes 11 and 22 of the miR-130 family, paralogous miRNA sequences, miR-130a and miR-130b are situated, respectively...
May 5, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/28454274/role-of-endoplasmic-reticulum-stress-on-cisplatin-resistance-in-ovarian-carcinoma
#17
Jing Tian, Rong Liu, Quanxin Qu
Endoplasmic reticulum (ER) is an essential site of cellular homeostasis regulation. ER stress (ERS) may induce autophagy in tumor cells that escape from apoptosis. The present study examined the effects and mechanism of ERS on cisplatin (DDP) sensitivity in ovarian carcinoma. SKOV3 tumor cells treated with Saquinavir were subjected to western blot and reverse transcription-quantitative polymerase chain reaction analysis to determine protein and messenger RNA (mRNA) expression levels of mechanistic target of rapamycin (mTOR) and Beclin 1...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454268/tcrp1-expression-is-associated-with-platinum-sensitivity-in-human-lung-and-ovarian-cancer-cells
#18
Xiaorong Liu, Meiling Feng, Guopei Zheng, Yixue Gu, Chengkun Wang, Zhimin He
Platinum-based drugs, including cisplatin (DDP) and oxaliplatin (L-OHP), are among the most potent chemotherapy drugs, and are widely utilized for the treatment of human lung and ovarian cancer. However, certain patients do not respond to platinum-based agents, and even those who initially benefit from the treatment will eventually exhibit resistance to these drugs. Although certain factors have been investigated for their potential to predict platinum resistance, more effective predictors for the improved management of patients with lung and ovarian cancer are required...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28450177/ovarian-cancer-stem-cells-more-questions-than-answers
#19
REVIEW
Petronella Beatrix Ottevanger
Epithelial ovarian cancer is a highly lethal disease, which is usually diagnosed at a late stage with extensive metastases in the abdominal cavity. Ovarian cancer either develops from the ovarian surface epithelium (OSE) or from serous intra-epithelial carcinoma (STIC). Primary therapy consists of debulking surgery and platinum based chemotherapy. The success of debulking surgery depends on surgical skills but also on the gene signature of the tumour. Debulking surgery combined with first line platinum based chemotherapy, frequently leads to complete remission...
April 24, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28440503/cd24-expression-is-a-marker-for-predicting-clinical-outcome-and-regulates-the-epithelial-mesenchymal-transition-in-ovarian-cancer-via-both-the-akt-and-erk-pathways
#20
Kiyoko Nakamura, Yoshito Terai, Akiko Tanabe, Yoshihiro J Ono, Masami Hayashi, Kazuya Maeda, Satoe Fujiwara, Keisuke Ashihara, Michihiko Nakamura, Yoshimichi Tanaka, Tomohito Tanaka, Satoshi Tsunetoh, Hiroshi Sasaki, Masahide Ohmichi
The degree of peritoneal dissemination and chemotherapy-resistant tumors is related to the prognosis in patients with advanced-stage ovarian cancer. The epithelial-mesenchymal-transition (EMT) is a multifaceted pathological program that endows cancer cells with the ability to invade and disseminate. CD24 is frequently overexpressed in various human cancers and is correlated with a poor prognosis. We herein examined the functions of CD24 in human ovarian cancer cell lines and evaluated how it contributes to the molecular mechanism underlying the regeneration of cancer stem-like cells (CSCs) through the EMT mechanism in ovarian carcinoma...
June 2017: Oncology Reports
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