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Choi JY, Jeong M, Lee K, Kim JO, Lee WH, Park I, Kwon HC, Choi JH. Sedum middendorffianum Maxim Induces Apoptosis and Inhibits the Invasion of Human Ovarian Cancer Cells via Oxidative Stress Regulation. Antioxidants (Basel) 2023; 12:1386. [PMID: 37507925 PMCID: PMC10376315 DOI: 10.3390/antiox12071386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/30/2023] [Accepted: 07/03/2023] [Indexed: 07/30/2023] Open
Abstract
Sedum middendorffianum Maxim (SMM) is a Korean endemic plant belonging to the Crassulaceae family. This study aimed to investigate the antitumor effects of the SMM extract on human ovarian cancer cells. Among five endemic plants grown in Korea, the SMM extract showed the most potent cytotoxicity in ovarian cancer cells and had little effect on normal ovarian surface epithelial cells. Furthermore, we revealed that the SMM extract dose-dependently induced apoptosis in human ovarian cancer A2780 and SKOV3 cells. The SMM extract markedly stimulated the activation of caspase-3/8, while the broad-spectrum caspase inhibitor and caspase-8 selective inhibitor significantly reversed SMM extract-induced apoptosis. In addition, the SMM extract significantly inhibited cell invasion and the expression levels of matrix metalloproteinase (MMP)-2 and MMP-9 in ovarian cancer cells. Notably, the SMM extract increased the generation of intracellular ROS, and pretreatment with antioxidant N-acetyl-L-cysteine (NAC) significantly suppressed SMM-induced cytotoxicity and anti-invasive activity. Moreover, NAC treatment reversed the SMM-induced inhibition of MMP-2/9 expression. Taken together, these data suggest that the SMM extract induces caspase-dependent apoptotic cell death and inhibits MMP-dependent invasion via ROS regulation.
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Affiliation(s)
- Ju-Yeon Choi
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Miran Jeong
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Kijun Lee
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Jin-Ok Kim
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Wan Hee Lee
- Hantaek Botanical Garden, Yongin 17183, Republic of Korea
| | - InWha Park
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Republic of Korea
| | - Hak Cheol Kwon
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Republic of Korea
| | - Jung-Hye Choi
- Department of Biomedical and Pharmaceutical Science, Kyung Hee University, Seoul 02447, Republic of Korea
- Hantaek Botanical Garden, Yongin 17183, Republic of Korea
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Kikowska M, Piotrowska-Kempisty H, Kucińska M, Murias M, Budzianowski J, Budzianowska A, Kaczmarek M, Kowalczyk M, Stochmal A, Thiem B. Saponin Fractions from Eryngium planum L. Induce Apoptosis in Ovarian SKOV-3 Cancer Cells. Plants (Basel) 2023; 12:2485. [PMID: 37447047 DOI: 10.3390/plants12132485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/22/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023]
Abstract
(1) The cytotoxicity and antioxidant activity of different fractions as well as the pro-apoptotic activity of saponin fractions from Eryngium planum L. in SKOV-3 was investigated. (2) In screening studies, the cytotoxicity of six fractions on SKOV-3 was examined by LDH and SRB assays. The most active fractions-triterpenoid saponins-were selected for further investigation. To determine the mechanism of saponin fractions' cytotoxicity, their ability to induce apoptosis was examined via Annexin V assay. The effect of the saponin fractions on caspase 3 activity was measured using a Caspase 3 Assay Kit. The expression of 84 apoptosis-related genes was investigated in cancer cells exposed to saponin fractions from the roots. The radical scavenging capacity of different fractions was determined via DPPH assay. (3) The pronounced cytotoxic effects in SKOV-3 were demonstrated by saponin fractions from the leaves and roots. Those saponin fractions were chosen for further investigation. The treatment of cancer cell lines with saponins obtained from the roots provoked a significant increase in apoptotic cells. In the SKOV-3 cells, saponins caused upregulation of pro-apoptotic genes and a decrease in anti-apoptotic genes. The activation of caspase 3 was correlated with an increased DFFA expression level in the treated SKOV-3 cells. The most active fractions were phenolic acids from the shoots and roots. (4) To the best of our knowledge, the current study is the first to demonstrate that the barrigenol-type triterpenoid saponin fraction from the roots of E. planum inhibits SKOV-3 cell proliferation and induces apoptosis, which may be regulated by the expression of genes mostly specific to a mitochondria-related pathway.
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Affiliation(s)
- Małgorzata Kikowska
- Laboratory of Pharmaceutical Biology and Biotechnology, Department and Division of Practical Cosmetology and Skin Diseases Prophylaxis, Poznan University of Medical Sciences, Collegium Pharmaceuticum, 3 Rokietnicka St., 60-806 Poznan, Poland
| | | | - Małgorzata Kucińska
- Department of Toxicology, Poznan University of Medical Sciences, Dojazd 30, 60-631 Poznań, Poland
| | - Marek Murias
- Department of Toxicology, Poznan University of Medical Sciences, Dojazd 30, 60-631 Poznań, Poland
| | - Jaromir Budzianowski
- Laboratory of Pharmaceutical Biology and Biotechnology, Department and Division of Practical Cosmetology and Skin Diseases Prophylaxis, Poznan University of Medical Sciences, Collegium Pharmaceuticum, 3 Rokietnicka St., 60-806 Poznan, Poland
| | - Anna Budzianowska
- Laboratory of Pharmaceutical Biology and Biotechnology, Department and Division of Practical Cosmetology and Skin Diseases Prophylaxis, Poznan University of Medical Sciences, Collegium Pharmaceuticum, 3 Rokietnicka St., 60-806 Poznan, Poland
| | - Mariusz Kaczmarek
- Department of Clinical Immunology, Poznan University of Medical Sciences, 5 Rokietnicka, 60-806 Poznań, Poland
| | - Mariusz Kowalczyk
- Department of Biochemistry and Crop Quality, Institute of Soil Science and Plant Cultivation, State Research Institute, 10 Czartoryskich St., 24-100 Puławy, Poland
| | - Anna Stochmal
- Department of Biochemistry and Crop Quality, Institute of Soil Science and Plant Cultivation, State Research Institute, 10 Czartoryskich St., 24-100 Puławy, Poland
| | - Barbara Thiem
- Laboratory of Pharmaceutical Biology and Biotechnology, Department and Division of Practical Cosmetology and Skin Diseases Prophylaxis, Poznan University of Medical Sciences, Collegium Pharmaceuticum, 3 Rokietnicka St., 60-806 Poznan, Poland
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Guo R, Xu Q, Liu L, Liu H, Liu Y, Wei W, Qin Y. Bioactive Hexapeptide Reduced the Resistance of Ovarian Cancer Cells to DDP by Affecting HSF1/HSP70 Signaling Pathway. J Cancer 2021; 12:6081-6093. [PMID: 34539881 PMCID: PMC8425193 DOI: 10.7150/jca.62285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 08/10/2021] [Indexed: 12/05/2022] Open
Abstract
Ovarian cancer is the leading cause of death in gynecologic malignancies. Ovarian cancer as a metastatic malignant tumor is highly recurrent and prone to drug resistance. Bioactive peptides are an emerging area of biomedical research in reducing resistance of tumor cell to drugs. In this paper, we investigated the effects and mechanisms of bioactive hexapeptide (PGPIPN) derived in milk protein on the sensitivity of ovarian cancer cells to cis-dichlorodiammine platinum (DDP). Human ovarian cancer cell lines (SKOV3 and COC1), their DDP-resistant sublines (SKOV3/DDP and COC1/DDP) and human primary ovarian cancer cells were cultured in vitro under the combined treatment of DDP (close to IC50) and different concentrations of PGPIPN. The viabilities, apoptosis and cell cycle changes were respectively measured by WST-8 and flow cytometry. The mRNA and protein expression levels of HSF1, HSP70, MDR1, ERCC1 and β-actin gene were respectively assayed by RT-qPCR and western blotting. The results showed that PGPIPN significantly increased the sensitivity of human ovarian cancer cells to DDP in inhibiting viability and inducing apoptosis in vitro. But the effects in sensitive cells were lower than DDP-resistant cells. PGPIPN significantly changed the cell cycles in all human ovarian cancer cells, which leaded to a significant increase in the percentage of cells blocked at G2/M phase and decrease the percentage of cells at G1 phases in a dose-dependent manner. PGPIPN affected the expression levels of HSF1, HSP70, MDR1 and ERCC1 genes. Compared with cells in DDP treatment alone, the expression levels of HSF1 and HSP70 in human ovarian cancer cells treated with DDP and PGPIPN together significantly decreased in dose-dependent manner. PGPIPN significantly decreased MDR1 and ERCC1 of drug-resistant ovarian cancer cell lines and human primary ovarian cancer cell in a dose-dependent manner. Pifithrin-μ (PFTμ, HSP70 inhibitor) decreased or removed the effects of peptide in increasing the sensitivity of ovarian cancer cells to DDP. This suggests that PGPIPN enhanced the sensitivity of ovarian cancer cells to DDP partially via reducing the activity of HSF1/HSP70 signaling pathway, thus inducing cell apoptosis and decreasing repairment of DNA damage.
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Affiliation(s)
- Ruowen Guo
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Qia Xu
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Liwei Liu
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China.,Medical Laboratory Centre, PLA Clinical College (901 Hospital) of Anhui Medical University, Hefei, Anhui 230031, P.R. China
| | - Hui Liu
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yun Liu
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Wenmei Wei
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yide Qin
- School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
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Xu L, Xu Y, Zheng J, Zhao Y, Wang H, Qi Y. Dacomitinib improves chemosensitivity of cisplatin-resistant human ovarian cancer cells. Oncol Lett 2021; 22:569. [PMID: 34113397 PMCID: PMC8185702 DOI: 10.3892/ol.2021.12830] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 01/28/2021] [Indexed: 01/26/2023] Open
Abstract
Drug resistance hinders effectiveness of human ovarian cancer (OC) therapies, such as cisplatin or paclitaxel therapy. Although dacomitinib, a novel anticancer agent is used against multiple types of cancers, such as non-small cell lung cancer, head and neck cancer, few studies report its effectiveness in drug-resistant human OC cells. In the present study, would healing, microplate spectrophotometer analysis, flow cytometry analysis, western blotting and Gene Expression Omnibus (GEO) analysis were used to detect the synergistic effect of dacomitinib and cisplatin in human OC SKOV-3 or OV-4 cells. Co-administration of dacomitinib and cisplatin significantly reduced viability and promoted cell apoptosis of drug resistant OC cells. In addition, dacomitinib increased Cadherin 1 (CDH1) levels and decreased P-glycoprotein (P-GP) levels in cisplatin-resistant OC cells. In addition, GEO analysis demonstrated that dacomitinib inhibited the epidermal growth factor receptor (EGFR) signaling pathway. In summary, dacomitinib improves chemosensitivity of cisplatin in human OC by regulating CDH1 and P-GP protein levels and inhibiting the EGFR signaling pathway.
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Affiliation(s)
- Lei Xu
- Obstetrics and Gynecology Department, Maternal and Child Health Hospital of Zibo City, Zibo, Shandong 255022, P.R. China
| | - Ying Xu
- Obstetrics and Gynecology Department, Maternal and Child Health Hospital of Zibo City, Zibo, Shandong 255022, P.R. China
| | - Jianbing Zheng
- Obstetrics and Gynecology Department, Maternal and Child Health Hospital of Zibo City, Zibo, Shandong 255022, P.R. China
| | - Yun Zhao
- Obstetrics and Gynecology Department, Maternal and Child Health Hospital of Zibo City, Zibo, Shandong 255022, P.R. China
| | - Hongcai Wang
- Obstetrics and Gynecology Department, Maternal and Child Health Hospital of Zibo City, Zibo, Shandong 255022, P.R. China
| | - Yushu Qi
- Obstetrics and Gynecology Department, Maternal and Child Health Hospital of Zibo City, Zibo, Shandong 255022, P.R. China
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Zhao M, Ji H, Fu Q, Cheng Q, Zhang Y, Yang Y. MicroRNA-134-3p inhibits ovarian cancer progression by targeting flap structure-specific endonuclease 1 in vitro. Oncol Rep 2020; 45:119-128. [PMID: 33169800 PMCID: PMC7709829 DOI: 10.3892/or.2020.7844] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 10/06/2020] [Indexed: 11/06/2022] Open
Abstract
Ovarian cancer (OC) is one of the most lethal gynecological malignancies in the world. The aim of the present study was to examine the role of microRNA (miR)-134-3p in OC. Reverse transcription-quantitative PCR was used to measure the expression levels of miR-134-3p. Cell Counting Kit-8, TUNEL, flow cytometric and colony formation assays were performed to examine the effects of miR-134-3p on OC cell proliferation. Moreover, wound healing and Transwell assays were performed to examine the effects on migration and invasion. In addition, western blot analyses were used to assess protein expression. Finally, the target genes of miR-134-3p were analyzed by bioinformatics analysis and dual-luciferase reporter assay. The results revealed that miR-134-3p expression was low in OC cells compared with in normal ovarian cells. The overexpression of miR-134-3p decreased cell viability, facilitated cell apoptosis, inhibited cell proliferation and arrested the cell cycle in SKOV-3 and OVCAR-3 cells. Furthermore, transfection using a miR-134-3p mimic inhibited the migration and invasion of SKOV-3 and OVCAR-3 cells, and decreased the protein expression levels of cyclooxygenase-2, matrix metalloproteinase (MMP)2 and MMP9. Bioinformatics analysis indicated that one of the potential target genes of miR-134-3p was flap structure-specific endonuclease 1 (FEN1), which was confirmed by dual-luciferase reporter assay. Moreover, overexpression of miR-134-3p decreased the expression levels of FEN1 in SKOV-3 and OVCAR-3 cells. Additionally, overexpression of FEN1 reversed the effects of the miR-134-3p mimic on the proliferation, migration and invasion of SKOV-3 and OVCAR-3 cells. Overall, the findings of the present study demonstrated that miR-134-3p may inhibit OC cell proliferation, migration and invasion by directly targeting FEN1.
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Affiliation(s)
- Mengshi Zhao
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P.R. China
| | - Hongjie Ji
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P.R. China
| | - Qiang Fu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P.R. China
| | - Qian Cheng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P.R. China
| | - Yu Zhang
- Department of Obstetrics and Gynecology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Yu Yang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, P.R. China
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Wang J, Xu Z, Hu X, Yang Y, Su J, Liu Y, Zhou L, Qin J, Zhang D, Yu H. Epoxycytochalasin H: An Endophytic Phomopsis Compound Induces Apoptosis in A2780 Cells Through Mitochondrial Damage and Endoplasmic Reticulum Stress. Onco Targets Ther 2020; 13:4987-4997. [PMID: 32581557 PMCID: PMC7280062 DOI: 10.2147/ott.s253716] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 05/13/2020] [Indexed: 11/23/2022] Open
Abstract
Background Natural compounds extracted from plants have been reported to have antitumor activity. A fungal metabolite from Phomopsis, identified as epoxycytochalasin H and isolated from the flowering plant Polygonatum sibiricum, was found to have significant antitumor activity. In this study, we report the antitumor effects and mechanism of action of epoxycytochalasin H in the ovarian cancer cell line A2780. Our data suggest that epoxycytochalasin H markedly reduces cell proliferation and induces apoptosis in ovarian cancer cells. Materials and Methods The viability, apoptosis and colony formation of A2780 cells, treated with epoxycytochalasin H, were detected by MTT assay, nuclear staining, flow cytometry, and clone formation assay. MitoROS and mitochondrial membrane potentials were detected by MitoSOX staining and flow cytometry. The expression of proteins associated with apoptosis, autophagy, and endoplasmic reticulum stress, in A2780 cells treated with epoxycytochalasin H, was detected by Western blot. Effects of mitophagy were detected in Parkin-overexpressing 293T cells. Results Our data suggested that epoxycytochalasin H could strongly reduce cell proliferation and induce apoptosis in ovarian cancer cell line A2780. Epoxycytochalasin H induced apoptosis through mitochondrial injury, mitophagy, and endoplasmic reticulum stress. Specifically, epoxycytochalasin H increased ROS level in cells, and in mitochondria, it decreased mitochondrial membrane potential, caused mitochondrial injury, activated macroautophagy and mitophagy, and subsequently induced apoptosis via the mitochondrial pathway. Additionally, it was discovered that epoxycytochalasin H could induce apoptosis more significantly in 293T cells overexpressing Parkin than in the parental cells. Thus, the mitophagy activated by epoxycytochalasin H could promote apoptosis. In addition, epoxycytochalasin H mediated endoplasmic reticulum stress-related apoptosis. Conclusion Epoxycytochalasin H could promote apoptosis of human ovarian cancer A2780 cells by activating mitochondrial and endoplasmic reticulum stress-related apoptotic pathways.
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Affiliation(s)
- Jiabin Wang
- Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China.,Department of Microbiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China
| | - Zhonghang Xu
- Department of Gastrointestinal Colorectal and Anal Surgery, China-Japan Union Hospital, Jilin University, Changchun 130033, People's Republic of China
| | - Xiaoqing Hu
- Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China
| | - Yimeng Yang
- Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China.,Department of Microbiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China
| | - Jing Su
- Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China
| | - Yanan Liu
- Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China
| | - Li Zhou
- Department of Obstetrics & Gynecology, The First Hospital of Jilin University, Changchun 130021, People's Republic of China
| | - Jianchun Qin
- College of Plant Sciences, Jilin University, Changchun, Jilin 130062, People's Republic of China
| | - Dawei Zhang
- Center of Animal Experiment, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China
| | - Huimei Yu
- Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China.,Center of Animal Experiment, College of Basic Medical Sciences, Jilin University, Changchun 130021, People's Republic of China
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Yang Z, Pan Q, Zhang D, Chen J, Qiu Y, Chen X, Zheng F, Lin F. Silibinin restores the sensitivity of cisplatin and taxol in A2780-resistant cell and reduces drug-induced hepatotoxicity. Cancer Manag Res 2019; 11:7111-7122. [PMID: 31440098 PMCID: PMC6668021 DOI: 10.2147/cmar.s201341] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 06/06/2019] [Indexed: 11/23/2022] Open
Abstract
Purpose Ovarian cancer is the most lethal cancer among all gynaecological malignancies. The combination theraputics of cisplatin and taxol is widely used in clinicals for ovarian cancer treatment. However, long-term use of cisplatin and taxol induces strong tolerance and hepatotoxicity. Since silibinin is a commonly used anti-hepatotoxic drug in Europe and Asia, the aim of this study was to determine whether silibinin could restore the sensitivity of combination use of cisplatin and taxol in drug-resistant human ovarian cancer cells and reduce drug-induced hepatotoxicity. Patients and methods Normal hepatocyte LO2 cells and A2780/DDP cells were treated with silibinin, cisplatin, taxol, cisplatin and taxol plus silibinin for 48 h. Cell viability was determined by MTT and long-term proliferation assay, while apoptosis and cell cycle progression were assessed by flow cytometric analysis. DNA damage was evluated by immunofluorescence assays. The metastatic activity of A2780/DDP was determined by cell adhesion assay. Results The addition of silibinin on cisplatin and/or toxal could sensitize the antitumor activity of cisplatin and toxal on A2780/DDP cells, supress cell-matrix adhesion of A2780/DDP, inhibit the cell proliferation, result in A2780/DDP cells apoptosis. In addition, silibinin could effectively reduce cisplatin and/or toxal-induced hepatotoxicity by protecting DNA from damage and restoring the potential of cell proliferation in cisplatin and/or toxal-treated LO2 cells. Conclusion Our results suggest that silibinin could restore the sensitivity of cisplatin and taxol in drug-resistant human ovarian cancer cells and reduce durg-induced hepatotoxicity in cell level.
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Affiliation(s)
- Zhichun Yang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, People's Republic of China
| | - Qionghui Pan
- Department of Gynecology, Wenzhou People's Hospital, Wenzhou 325027, Zhejiang, People's Republic of China
| | - Dingfang Zhang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, People's Republic of China
| | - Jianqiang Chen
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, People's Republic of China
| | - Yinda Qiu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, People's Republic of China
| | - Xiaojing Chen
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, People's Republic of China
| | - Feiyun Zheng
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, People's Republic of China
| | - Feng Lin
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, People's Republic of China
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Abstract
INTRODUCTION Oridonin, which is isolated from the Chinese herb Rabdosia rubescens, has been reported to exhibit an anti-tumorous effect on different cancers. In this study, we investigated the molecular mechanism by which oridonin suppresses human ovarian cancer. MATERIAL AND METHODS The inhibition of oridonin on cell proliferation was assessed by CCK8 assay. Cell cycle and apoptosis were analyzed by flow cytometry, staining with propidium iodide (PI) or annexin-V/PI respectively. The metastasis rate was evaluated using a transwell migration assay. The expression of metastasis-associated genes and mTOR pathway related genes were detected by western blot. RESULTS We demonstrated that oridonin suppressed the proliferation and blocked the cell cycle in G1/S phage and induced apoptosis in SKOV3 and A2780 cells (p < 0.01). We further found that the mTOR signaling pathway was suppressed by the treatment with oridonin, and the activation of the mTOR pathway attenuated the anti-tumorous effect of oridonin in human ovarian cancer cells, suggesting that the mTOR pathway was involved in the anti-tumorous process of oridonin. Additionally, the activation of the mTOR pathway by an exogenous activator reduced the expression level of FOXP3 (p < 0.01), thus providing evidence that FOXP3 is a factor that is necessary for the anti-tumorous effect of oridonin, and is negatively regulated by the mTOR pathway. CONCLUSIONS These results suggested that oridonin suppressed the mTOR signaling pathway, up-regulated the FOXP3 level, and inhibited metastasis of human ovarian cancer cells.
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Affiliation(s)
- Ye Wang
- Department of Integration of Western and Traditional Medicine, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Zhiling Zhu
- Department of Integration of Western and Traditional Medicine, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
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Cai Y, Huang J, Xing H, Li B, Li L, Wang X, Peng D, Chen J. Contribution of FPR and TLR9 to hypoxia-induced chemoresistance of ovarian cancer cells. Onco Targets Ther 2018; 12:291-301. [PMID: 30643427 PMCID: PMC6314315 DOI: 10.2147/ott.s190118] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background/purpose The aim of this study was to investigate the role and mechanisms of the formyl peptide receptor (FPR) and the toll-like receptor 9 (TLR9) in hypoxia-induced chemoresistance of human ovarian cancer cells. Materials and methods SKOV3 cells were exposed to hypoxia for 24 hours, the supernatant was collected to stimulate normoxia-cultured SKOV3, and the inhibition rate of cell growth was detected with CCK8 test. The agonist of TLR9 CpG ODN and the agonist of FPR fMLF were applied to investigate the chemosensitivity of SKOV3 cells to cisplatin. The cells were also treated with FPR antagonist t-Boc or TLR9 antagonist CQ. Western blot was applied to detect protein levels of FPR, TLR9, MRP, P-gp, p53 and Beclin-1. Immunofluorescence staining was applied to observe the distribution of TLR9 in SKOV3 cells. Results Hypoxia exposure reduced the inhibition rate of cisplatin on SKOV3 cells. WB showed that FPR and TLR9 were expressed in human ovarian cancer tissues and SKOV3 cells, and the levels were increased with longer hypoxia time. After SKOV3 was stimulated with fMLF or ODN2006, cisplatin-induced inhibition rate was significantly decreased. tBoc and CQ significantly attenuated hypoxia supernatant-induced chemoresistance of SKOV3 cells. Hypoxia supernatants significantly increased MRP, P-gp, p53 and Beclin-1 proteins in SKOV3 cells, which were significantly reduced by tBoc. Conclusion Hypoxia upregulates the expression of FPR and TLR9, and promotes the release of ligands for both receptors in human ovarian cancer cell line. FPR and TLR9 may be noval targets for chemosensitizing to ovarian cancer cells.
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Affiliation(s)
- Yongqing Cai
- Department of Pharmacy, Daping Hospital and Research Institute of Surgery, Army Medical University, Chongqing 400042, China,
| | - Jian Huang
- Department of High Altitude Biology and Pathology, High Altitude Military Medical College, Army Medical University, Chongqing 400042, China
| | - Haiyan Xing
- Department of Pharmacy, Daping Hospital and Research Institute of Surgery, Army Medical University, Chongqing 400042, China,
| | - Bin Li
- Department of Pharmacy, Daping Hospital and Research Institute of Surgery, Army Medical University, Chongqing 400042, China,
| | - Ling Li
- Department of Pharmacy, Daping Hospital and Research Institute of Surgery, Army Medical University, Chongqing 400042, China,
| | - Xianfeng Wang
- Department of Pharmacy, Daping Hospital and Research Institute of Surgery, Army Medical University, Chongqing 400042, China,
| | - Dan Peng
- Department of Pharmacy, Daping Hospital and Research Institute of Surgery, Army Medical University, Chongqing 400042, China,
| | - Jianhong Chen
- Department of Pharmacy, Daping Hospital and Research Institute of Surgery, Army Medical University, Chongqing 400042, China,
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10
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Zheng N, Liu W, Chen J, Li B, Liu J, Wang J, Gao Y, Shao J, Jia L. CXCR7 is not obligatory for CXCL12-CXCR4-induced epithelial-mesenchymal transition in human ovarian cancer. Mol Carcinog 2018; 58:144-155. [PMID: 30259564 DOI: 10.1002/mc.22916] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 09/05/2018] [Accepted: 09/14/2018] [Indexed: 12/25/2022]
Abstract
Although the CXCL12-CXCR4/CXCR7 chemokine axis is demonstrated to play an integral role in tumor progression, the controversy exists and the role of CXCL12-CXCR4/CXCR7 signaling axis in epithelial-mesenchymal transition (EMT) of human ovarian cancer has not been explored. Here, we showed that in ovarian cancer CXCL12 induced EMT phenotypes including the spindle-like cell morphology, podia and stress fiber formation, a decrease in E-cadherin expression, and increases in mesenchymal N-cadherin and vimentin expressions. These effects of CXCL12 could be antagonized by the CXCR4 antagonist AMD3100, but not by the anti-CXCR7 antibody. The expressions of the EMT markers were significantly down-regulated by the CXCR4 siRNA, and up-regulated by the pcDNA3.1/CXCR4 plasmid, whereas not affected by the CXCR7 siRNA. Furthermore, intraperitoneal administration of AMD3100 inhibited tumor dissemination and growth in the nude mice inoculated with ovarian IGROV-1 cells with a concomitant reduction in EMT marker expressions. Collectively, these data suggest that CXCR4, rather than CXCR7, plays a key role in CXCL12-activated EMT phenotypes, and targeting the CXCL12-CXCR4 chemokine axis represents a potential therapeutic strategy to prevent ovarian cancer progression.
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Affiliation(s)
- Ning Zheng
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Weiqun Liu
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Jiahang Chen
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Bifei Li
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Jian Liu
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Jichuang Wang
- Fujian Key Laboratory for Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, Fujian Medical University, Fuzhou, Fujian, China
| | - Yu Gao
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Jingwei Shao
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
| | - Lee Jia
- Cancer Metastasis Alert and Prevention Center, and Biopharmaceutical Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China.,Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, China
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11
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Wu W, Liu Y, Ye H, Li Z. Millepachine showed novel antitumor effects in cisplatin-resistant human ovarian cancer through inhibiting drug efflux function of ATP-binding cassette transporters. Phytother Res 2018; 32:2428-2435. [PMID: 30123958 DOI: 10.1002/ptr.6180] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/26/2018] [Accepted: 07/23/2018] [Indexed: 02/05/2023]
Abstract
Millepachine (MIL), a bioactive natural chalcone from Chinese herbal medicine Millettia pachycarpa Benth, exhibits strong antitumor effects against many human cancer cells both in vitro and in vivo. In this study, we found that MIL significantly inhibited the proliferation of cisplatin-resistant A2780CP cells via inducing obvious G2/M arrest and apoptosis and down-regulating the activity of topoisomerase II protein. We further found that the mechanism by which MIL showed good antitumor effects in cisplatin-resistant human ovarian cancer was associated with inhibiting the expression of ATP-binding cassette transporters in cisplatin-resistant A2780CP cells. Importantly, MIL did not only significantly inhibit the tumor growth in cisplatin-sensitive A2780S xenograft model, with an inhibitory rate of 73.21%, but also inhibited the tumor growth in the cisplatin-resistant A2780CP xenograft model, with an inhibitory rate of 65.68% (p < 0.001 vs. control; p < 0.001 vs. DDP). In addition, MIL did not induce acquired drug resistance in A2780S tumor-bearing mice with an inhibitory rate of 60.03%. The promising in vitro and in vivo performance indicated that MIL exhibited potential significance for drug research and development.
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Affiliation(s)
- Wenshuang Wu
- Department of Thyroid Surgery, West China Hospital, Sichuan University, Chengdu, China.,Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, China
| | - Yang Liu
- Department of Thyroid Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Haoyu Ye
- Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, China
| | - Zhihui Li
- Department of Thyroid Surgery, West China Hospital, Sichuan University, Chengdu, China
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12
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Shilnikova K, Piao MJ, Kang KA, Ryu YS, Park JE, Hyun YJ, Zhen AX, Jeong YJ, Jung U, Kim IG, Hyun JW. Shikonin induces mitochondria-mediated apoptosis and attenuates epithelial-mesenchymal transition in cisplatin-resistant human ovarian cancer cells. Oncol Lett 2018; 15:5417-5424. [PMID: 29563994 PMCID: PMC5858079 DOI: 10.3892/ol.2018.8065] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 08/08/2017] [Indexed: 12/23/2022] Open
Abstract
Cisplatin-based chemotherapy often results in the development of chemoresistance when used to treat ovarian cancer, which is difficult to overcome. The present study investigated the cytotoxic and anti-migratory effects of shikonin, a naphthoquinone compound, on cisplatin-resistant human ovarian cancer A2780 cells (A2780-CR). Shikonin had a potent dose-dependent cytotoxic effect on A2780-CR cells, with 9 µM shikonin treatment reducing A2780-CR cell viability by 50%, validate using an MTT assay. Shikonin induced apoptosis, as evidenced by the increased number of apoptotic bodies, following staining with Hoechst 33342, and terminal deoxynucleotidyl cell transferase dUTP nick end labeling-positive cells following treatment. Flow cytometry and fluorescent microscope imaging, following JC-1 staining, revealed that shikonin increased mitochondrial membrane depolarization. Also it altered the levels of apoptosis-associated proteins, leading to diminished expression of B cell lymphoma-2 (Bcl-2), enhanced expression of Bcl-associated X, and cleavage of caspase-9 and −3, as revealed using western blot analysis. Shikonin activated mitogen-activated protein kinases; while treatment with specific inhibitors of these kinases attenuated the decline in cell viability induced by shikonin treatment. In addition, the cell migration assay and western blot analysis indicated that shikonin decreased the migratory capacity of A2780-CR cells via the upregulation of epithelial-cadherin and downregulation of neural-cadherin. Taken together, the results of the present study indicated that shikonin induces mitochondria-mediated apoptosis and attenuates the epithelial-mesenchymal transition in A2780-CR cells.
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Affiliation(s)
- Kristina Shilnikova
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Mei Jing Piao
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Kyoung Ah Kang
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Yea Seong Ryu
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Jeong Eon Park
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Yu Jae Hyun
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Ao Xuan Zhen
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
| | - Yong Joo Jeong
- Department of Bio and Nanochemistry, Kookmin University, Seoul 02707, Republic of Korea
| | - Uhee Jung
- Radiation Biotechnology Research Division, Korea Atomic Energy Research Institute, Jeongeup, Jeollabuk 56212, Republic of Korea
| | - In Gyu Kim
- Department of Radiation Biology, Environmental Radiation Research Group, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | - Jin Won Hyun
- Department of Biochemistry, School of Medicine, Jeju National University, Jeju 63243, Republic of Korea
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13
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Mitamura T, Pradeep S, McGuire M, Wu S, Ma S, Hatakeyama H, Lyons YA, Hisamatsu T, Noh K, Villar-Prados A, Chen X, Ivan C, Rodriguez-Aguayo C, Hu W, Lopez-Berestein G, Coleman RL, Sood AK. Induction of anti-VEGF therapy resistance by upregulated expression of microseminoprotein (MSMP). Oncogene 2018; 37:722-731. [PMID: 29059175 PMCID: PMC6040890 DOI: 10.1038/onc.2017.348] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 03/31/2017] [Accepted: 06/14/2017] [Indexed: 12/28/2022]
Abstract
Anti-vascular endothelial growth factor (VEGF) therapy has demonstrated efficacy in treating human metastatic cancers, but therapeutic resistance is a practical limitation and most tumors eventually become unresponsive. To identify microenvironmental factors underlying the resistance of cancer to antiangiogenesis therapy, we conducted genomic analyses of intraperitoneal ovarian tumors in which adaptive resistance to anti-VEGF therapy (B20 antibody) developed. We found that expression of the microseminoprotein, prostate-associated (MSMP) gene was substantially upregulated in resistant compared with control tumors. MSMP secretion from cancer cells was induced by hypoxia, triggering MAPK signaling in endothelial cells to promote tube formation in vitro. Recruitment of the transcriptional repressor CCCTC-binding factor (CTCF) to the MSMP enhancer region was decreased by histone acetylation under hypoxic conditions in cancer cells. MSMP siRNA, delivered in vivo using the DOPC nanoliposomes, restored tumor sensitivity to anti-VEGF therapy. In ovarian cancer patients treated with bevacizumab, serum MSMP concentration increased significantly only in non-responders. These findings imply that MSMP inhibition combined with the use of antiangiogenesis drugs may be a new strategy to overcome resistance to antiangiogenesis therapy.
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Affiliation(s)
- Takashi Mitamura
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Obstetrics and Gynecology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Sunila Pradeep
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Michael McGuire
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Sherry Wu
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Shaolin Ma
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Hiroto Hatakeyama
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Yasmin A. Lyons
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Takeshi Hisamatsu
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Kyunghee Noh
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Gene Therapy Research Unit, Korea Research Institute of Bioscience and Biotechnology, Dajeon, Republic of Korea
| | - Alejandro Villar-Prados
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Xiuhui Chen
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Cristina Ivan
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Center for RNA Interference and Non-Coding RNAs, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Cristian Rodriguez-Aguayo
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Center for RNA Interference and Non-Coding RNAs, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Wei Hu
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Gabriel Lopez-Berestein
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Center for RNA Interference and Non-Coding RNAs, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Robert L. Coleman
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Anil K. Sood
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Center for RNA Interference and Non-Coding RNAs, The University of Texas MD Anderson Cancer Center, Houston, Texas
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14
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Dang JH, Jin ZJ, Liu XJ, Hu D, Wang J, Luo Y, Li LL. Metformin in combination with cisplatin inhibits cell viability and induces apoptosis of human ovarian cancer cells by inactivating ERK 1/2. Oncol Lett 2017; 14:7557-64. [PMID: 29344202 DOI: 10.3892/ol.2017.7176] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 04/03/2017] [Indexed: 12/18/2022] Open
Abstract
Metformin protects against insulin resistance by restoring insulin sensitivity and may also possess anticancer activity. The aim of the present study was to investigate the effects of metformin alone or combined with cisplatin (DDP) on the cell viability and apoptosis of HO-8910 human ovarian cancer cells, and to investigate metformin as a potential novel therapeutic for treating ovarian cancer. The viability of HO-8910 cells was assessed using a cell proliferation and cytotoxicity assay following treatment with different concentrations of metformin (0.01, 0.5, 1, 5 and 10 mM) and/or 5 µM of DDP. Flow cytometry was performed to examine cell apoptosis, and western blotting was used to measure the expression of extracellular signal-related kinase 1/2 (ERK1/2) phosphorylated (p)-ERK1/2, vascular endothelial growth factor (VEGF), VEGF receptor 2 (VEGFR2), B-cell lymphoma 2 (Bcl-2), Bcl-2-associated X (Bax) and caspase-3. The resultsof the present study revealed that metformin reduced the viability of HO-8910 cells in a time- and concentration-dependent manner and induced cell apoptosis in a concentration-dependent manner. Metformin combined with DDP evidently inhibited cell viability and induced apoptosis. In addition, ERK1/2 and genes associated with apoptosis regulation, such as VEGF, VEGFR2, Bcl-2, Bax and caspase-3, exhibited differential expression in the HO-8910 cells. The present study demonstrated that expression of p-ERK1/2, VEGF, VEGFR2 and Bcl-2 was downregulated by treatment with increasing concentrations of metformin, whereas expression of Bax and caspase-3 was evidently upregulated. Taken together, these data demonstrate that metformin in combination with DDP reduces cell viability and induces apoptosis of human ovarian cancer cells.
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15
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Oh K, Moon HG, Lee DS, Yoo YB. Tissue transglutaminase-interleukin-6 axis facilitates peritoneal tumor spreading and metastasis of human ovarian cancer cells. Lab Anim Res 2015; 31:188-97. [PMID: 26755922 DOI: 10.5625/lar.2015.31.4.188] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 11/25/2015] [Indexed: 12/26/2022] Open
Abstract
Inflammation has recently been implicated in cancer formation and progression. As tissue transglutaminase (TG2) has been associated with both inflammatory signaling and tumor cell behavior, we propose that TG2 may be an important link inducing interleukin-6 (IL-6)-mediated cancer cell aggressiveness, including cancer stem cell-like characteristics and distant hematogenous metastasis. We evaluated the effect of differential TG2 and IL-6 expression on in vivo distant metastasis of human ovarian cancer cells. IL-6 production in human ovarian cancer cells was dependent on their TG2 expression levels. The size and efficiency of tumor sphere formation were correlated with TG2 expression levels and were dependent on TG2-mediated IL-6 secretion in human ovarian cancer cells. Primary tumor growth and propagation in the peritoneum and distant hematogenous metastasis into the liver and lung were also dependent on TG2 and downstream IL-6 expression levels in human ovarian cancer cells. In this report, we provide evidence that TG2 is an important link in IL-6-mediated tumor cell aggressiveness, and that TG2 and downstream IL-6 could be important mediators of distant hematogenous metastasis of human ovarian cancer cells. Intervention specific to TG2 and/or downstream IL-6 in ovarian cancer cells could provide a promising means to control tumor metastasis.
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16
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Ruan Z, Liu J, Kuang Y. Isolation and characterization of side population cells from the human ovarian cancer cell line SK-OV-3. Exp Ther Med 2015; 10:2071-2078. [PMID: 26668597 PMCID: PMC4665172 DOI: 10.3892/etm.2015.2836] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 09/29/2015] [Indexed: 02/06/2023] Open
Abstract
Ovarian cancer (OC) is the most malignant type of gynecological tumor due to its high recurrence rate following initial treatment. Previous studies have indicated that cancer stem cells (CSCs) may be a potential cause underlying the high proportion of recurrence. Side population (SP) cells isolated from cancer cell lines have been shown to exhibit characteristics associated with CSCs, but studies on SP cells in human ovarian SK-OV-3 cell line are limited. In the present study, the SP cell fraction (4.83% of the total cell population) was isolated using flow cytometry, and analyzed by immunocytochemical analysis and reverse transcription-quantitative polymerase chain reaction. The results showed that SP cells exhibited a high mean fluorescence intensity for CD44, a CSC marker, in addition to elevated expression of the CSCs-associated genes, ATP-binding cassette sub-family G member 2 and Nestin. These findings indicated the stem cell-like features of the SP cells. Furthermore, a colony formation test showed that the isolated SP cells possessed a marked capacity for self-regeneration and proliferation. In addition, a cell cycle assay involving cisplatin indicated that the SP cells were strongly resistant to chemotherapy. In conclusion, the present results suggested that SP cells isolated from the SK-OV-3 cell line exhibited properties typically associated with CSCs. Therefore, the isolated SP cells may be used to provide novel insight into potential therapies against OC.
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Affiliation(s)
- Zhengyi Ruan
- Department of Gynecology, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
| | - Jianhua Liu
- Department of Gynecology, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
| | - Yanping Kuang
- Department of Assisted Reproduction, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
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17
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Koneru M, Purdon TJ, Spriggs D, Koneru S, Brentjens RJ. IL-12 secreting tumor-targeted chimeric antigen receptor T cells eradicate ovarian tumors in vivo. Oncoimmunology 2015; 4:e994446. [PMID: 25949921 DOI: 10.4161/2162402x.2014.994446] [Citation(s) in RCA: 314] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 11/28/2014] [Indexed: 02/07/2023] Open
Abstract
A novel approach for the treatment of ovarian cancer includes immunotherapy with genetically engineered T cells targeted to ovarian cancer cell antigens. Using retroviral transduction, T cells can be created that express an artificial T cell receptor (TCR) termed a chimeric antigen receptor (CAR). We have generated a CAR, 4H11-28z, specific to MUC-16ecto antigen, which is the over-expressed on a majority of ovarian tumor cells and is the retained portion of MUC-16 after cleavage of CA-125. We previously demonstrated that T cells modified to express the 4H11-28z CAR eradicate orthotopic human ovarian cancer xenografts in SCID-Beige mice. However, despite the ability of CAR T cells to localize to tumors, their activation in the clinical setting can be inhibited by the tumor microenvironment, as is commonly seen for endogenous antitumor immune response. To potentially overcome this limitation, we have recently developed a construct that co-expresses both MUC16ecto CAR and IL-12 (4H11-28z/IL-12). In vitro, 4H11-28z/IL-12 CAR T cells show enhanced proliferation and robust IFNγ secretion compared to 4H11-28z CAR T cells. In SCID-Beige mice with human ovarian cancer xenografts, IL-12 secreting CAR T cells exhibit enhanced antitumor efficacy as determined by increased survival, prolonged persistence of T cells, and higher systemic IFNγ. Furthermore, in anticipation of translating these results into a phase I clinical trial which will be the first to study IL-12 secreting CAR T cells in ovarian cancer, an elimination gene has been included to allow for deletion of CAR T cells in the context of unforeseen or off-tumor on-target toxicity.
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Key Words
- AAPCs, artificial antigen presenting cells; ADCC, antibody-dependent cellular cytotoxicity; ALL, acute lymphocytic leukemia; CAR, chimeric antigen receptor; EGFRt, truncated epidermal growth factor; EOC, epithelial ovarian cancer; i.p., intraperitoneal; IL-12, interleukin-12; i.v., intravenous; MDSC, myeloid-derived suppressor cells; PBL, peripheral blood leukocytes; PBMCs, peripheral blood mononuclear cells; scFv, single-chain fragment antibody; TAA, tumor-associated antigen; TCR, T cell receptor; TIL, tumor-infiltrating lymphocytes; Tregs, regulatory T cells.
- IL-12
- MUC16
- chimeric antigen receptors
- human ovarian cancer
- tumor microenvironment
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Affiliation(s)
- Mythili Koneru
- Department of Medicine; Memorial Sloan-Kettering Cancer Center ; New York, NY, USA
| | - Terence J Purdon
- Department of Medicine; Memorial Sloan-Kettering Cancer Center ; New York, NY, USA
| | - David Spriggs
- Department of Medicine; Memorial Sloan-Kettering Cancer Center ; New York, NY, USA
| | | | - Renier J Brentjens
- Department of Medicine; Memorial Sloan-Kettering Cancer Center ; New York, NY, USA
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18
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Duechler M, Peczek L, Szubert M, Suzin J. Influence of hypoxia inducible factors on the immune microenvironment in ovarian cancer. Anticancer Res 2014; 34:2811-2819. [PMID: 24922644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Ovarian tumors remain immunogenic even at advanced stages, but cancer-induced immunosuppression abrogates immune surveillance. The composition of the immune microenvironment in ovarian tumors was characterized by analyzing selected immunosuppressive factors in specimens from cancer patients. The influence of the hypoxia inducible factors on the immune microenvironment was also addressed. MATERIALS AND METHODS Tumor tissue was collected from 21 ovarian cancer patients immediately following tumor excision during surgery. The mRNA expression of selected genes was quantified, and tumor infiltrating leukocytes were characterized by flow cytometry to identify regulatory T-cells, myeloid-derived suppressor cells, and type-2 macrophages. RESULTS Overall, a pronounced heterogeneity was found among the analyzed samples. Nevertheless, statistical analysis revealed that the expression of hypoxia inducible factors correlated with the transcription levels of several immunosuppressive molecules. CONCLUSION The activity of hypoxia inducible factors contributes to cancer immunosuppression in ovarian cancer patients.
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MESH Headings
- Adenocarcinoma/immunology
- Adenocarcinoma/metabolism
- Adenocarcinoma/pathology
- Adenocarcinoma, Mucinous/immunology
- Adenocarcinoma, Mucinous/metabolism
- Adenocarcinoma, Mucinous/pathology
- Basic Helix-Loop-Helix Transcription Factors/genetics
- Basic Helix-Loop-Helix Transcription Factors/metabolism
- Biomarkers, Tumor/metabolism
- Cystadenocarcinoma, Serous/immunology
- Cystadenocarcinoma, Serous/metabolism
- Cystadenocarcinoma, Serous/pathology
- Endometrial Neoplasms/immunology
- Endometrial Neoplasms/metabolism
- Endometrial Neoplasms/pathology
- Female
- Flow Cytometry
- Humans
- Hypoxia
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Immunosuppression Therapy
- Macrophages/immunology
- Macrophages/metabolism
- Macrophages/pathology
- Middle Aged
- Myeloid Cells/immunology
- Neoplasm Grading
- Neoplasm Staging
- Ovarian Neoplasms/immunology
- Ovarian Neoplasms/metabolism
- Ovarian Neoplasms/pathology
- Prognosis
- RNA, Messenger/genetics
- Real-Time Polymerase Chain Reaction
- Reverse Transcriptase Polymerase Chain Reaction
- T-Lymphocytes, Regulatory/immunology
- Tumor Microenvironment
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Affiliation(s)
- Markus Duechler
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Poland
| | - Lukasz Peczek
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Poland
| | - Maria Szubert
- Department of Gynaecology and Obstetrics of the Medical University of Lodz, Clinical Department of Operative and Oncological Gynaecology, Lodz, Poland
| | - Jacek Suzin
- Department of Gynaecology and Obstetrics of the Medical University of Lodz, Clinical Department of Operative and Oncological Gynaecology, Lodz, Poland
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19
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Javid A, Ahmadian S, Saboury AA, Kalantar SM, Rezaei-Zarchi S. Chitosan-coated superparamagnetic iron oxide nanoparticles for doxorubicin delivery: synthesis and anticancer effect against human ovarian cancer cells. Chem Biol Drug Des 2013; 82:296-306. [PMID: 23594157 DOI: 10.1111/cbdd.12145] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 03/08/2013] [Accepted: 04/02/2013] [Indexed: 11/28/2022]
Abstract
Doxorubicin-loaded chitosan-coated superparamagnetic iron oxide nanoparticles (Fe3 O4 ; SPIO-NPs) were prepared by coprecipitation and emulsification cross-linking method and uniform NPs with an average particle size of 82 nm, with high encapsulation efficiencies, were obtained. The drug-loading efficiency of doxorubicin (3.2 mg/mg NPs) showed better results for the chitosan-loaded SPIO-NPs as compared to the bare ones (0.5 mg/mg; p < 0.05). The incubation of A2780 and OVCAR-3 human ovarian cancer cells with doxorubicin-loaded and doxorubicin-loaded chitosan-coated SPIO-NPs, for 24, 48, 72, 96, and 120 h, showed significant IC50 (2.0 ± 0.6 and 7.1 ± 2.7 mm doxorubicin) and IC90 (4.0 ± 9.2 and 10 ± 0.5 mm doxorubicin), respectively, after 96 h of incubation. While, 95% and 98% growth inhibition was seen in A2780 and OVCAR-3 cells after the 96-h exposure to the doxorubicin-chitosan-SPIO-NPs (p < 0.05). A 5-day (120 h) incubation with doxorubicin-chitosan-SPIO-NPs showed that A2780 and OVCAR-3 cells were able to uptake 120 and 110 pg iron/cell, respectively, when treated with doxorubicin-chitosan-SPIO-NPs for 72 h (p < 0.05).
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Affiliation(s)
- Amaneh Javid
- Department of Biochemistry, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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Kikuchi Y, Imaizumi E, Kataoka Y, Hirata J, Kita T, Tode T, Nagata I. Effects of granulocyte-colony-stimulating factor and interleukin-2 on ascites formation and the survival time of nude mice bearing human ovarian cancer cells. Cancer Immunol Immunother 1996; 43:257-61. [PMID: 9024501 PMCID: PMC11037776 DOI: 10.1007/s002620050331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The aim of this study was to elucidate the effect of intraperitoneal (i.p.) instillations of granulocyte-colony-stimulating factor (G-CSF) and/or interleukin-2 (IL-2) on ascites formation and the survival time of nude mice with malignant ascites, produced by i.p. inoculation of human ovarian cancer cells. When the nude mice were treated with medium alone, ascites was observed in all mice 28 days after tumor inoculation. When the mice were treated with cis-diamminedichloroplatinum(II) (cisplatin) alone, G-CSF alone or IL-2 alone, it took 35 days for the ascites to form in all mice. When cisplatin was combined with G-CSF or IL-2, one of ten mice did not form ascites during the observation period. Surprisingly, when G-CSF and IL-2 were simultaneously administered, ascites formation was not observed in any mice. Although i.p. treatment with cisplatin alone significantly prolonged the survival time, compared to medium alone, the lytic activity of spleen cells against HRA cells was significantly suppressed. When G-CSF or IL-2 was combined with cisplatin, the suppression by cisplatin was eliminated and subsequently resulted in a prolongation of the survival time. When G-CSF was combined with IL-2, both the peritoneal and splenic macrophages/ monocytes were stimulated and the splenic lytic activity was about double that following treatment with G-CSF alone on IL-2 alone, suggesting that complete inhibition of ascites formation results not only from a significant increase of the peritoneal macrophages but also from enhancement of the lytic activity. Two mice, died from dissemination of tumor in the abdominal cavity, but eight mice survived without tumor for more than 90 days. As confirmed by monitoring body weight and hematocrit, G-CSF and IL-2 seemed to have no adverse effect. From these results, we conclude that a combination therapy with G-CSF and IL-2 might be of clinical use for inhibiting large amounts of ascites, which may inhibit therapeutic effects for ovarian cancer patients.
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Affiliation(s)
- Y Kikuchi
- Department of Obstetrics and Gynecology, National Defense Medical College, Saitama, Japan
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Kikuchi Y, Iwano I, Miyauchi M, Kita T, Sugita M, Tenjin Y, Nagata I. Possible mechanisms of resistance to cis-diamminedichloroplatinum (II) of human ovarian cancer cells. Jpn J Cancer Res 1990; 81:701-6. [PMID: 2119370 PMCID: PMC6504050 DOI: 10.1111/j.1349-7006.1990.tb02630.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The mechanism of cis-diamminedichloroplatinum (II) (CDDP) resistance was examined by using a CDDP-resistant (KFr) cell line established by continuous exposure of KF cells (derived from serous cystadenocarcinoma of the ovary) to escalating doses of CDDP. When KFr cells were incubated with 66.7 microM CDDP, the uptake of CDDP was significantly inhibited and the cellular content in the KFr cells was about a half of that in KF cells after incubation for 4 h. When the KF or KFr cells were incubated for 4 h with 100 microM CDDP, the release pattern of CDDP from KFr cells was similar to that from KF cells. In addition, the DNA histogram of both KF and KFr cells revealed that KF cells seemed to contain two clones of cell population and the KFr cells may have been selected by exposure to CDDP. At 3 h after intraperitoneal administration of 0.5 mg of CDDP per mouse to nude mice with KF or KFr tumor, the CDDP content in the KFr tumor was significantly lower than that in the KF tumor. In contrast, at 6 or 9 h after CDDP administration the CDDP content in the KFr tumor was significantly higher than that in the KF tumor. Furthermore, the KFr cells had cross-resistance to various CDDP analogues including carboplatin. It was shown that cellular uptakes of two CDDP analogues into KFr cells were significantly lower than those into KF cells.
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Affiliation(s)
- Y Kikuchi
- Department of Obstetrics and Gynecology, National Defense Medical College, Saitama
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Ripamonti M, Canevari S, Ménard S, Mezzanzanica D, Miotti S, Orlandi R, Rilke F, Tagliabue E, Colnaghi MI. Human carcinoma cell lines xenografted in athymic mice: biological and antigenic characteristics of an intraabdominal model. Cancer Immunol Immunother 1987; 24:13-8. [PMID: 3545465 PMCID: PMC11038650 DOI: 10.1007/bf00199827] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/1986] [Accepted: 08/21/1986] [Indexed: 01/06/2023]
Abstract
In order to investigate in vivo clinical applications of murine monoclonal antibodies directed against human ovarian carcinoma a preclinical in vivo model was developed using BALB/c athymic mice. Three human carcinoma cell lines (MCF7, HT29, and SW626) were injected into the peritoneal cavity of pristane-primed animals and the biological and antigenic characteristics of the i.p. grown tumors were studied. The animals were killed when moribund or 6-8 weeks after tumor injection. At autopsy tumor take was observed in 85% of the injected animals, whereas palpable nodules were evident in only 83%. Examination of the peritoneal cavity revealed intraabdominal carcinomatosis with tumor masses varying in size between 0.2 and 0.5 cm in diameter and tumor sheets. The most frequently affected organs were the diaphragm, the liver, and the reproductive system. Ascitic fluid formation was rare and no animal developed tumors outside the peritoneal cavity. To determine whether the in vivo tumors retained the same antigenic characteristics as the in vitro cell lines, four monoclonal antibodies (MBr1, MOv2, MOv8, and MOv15) directed against ovarian carcinoma-associated antigens and two different experimental approaches (immunofluorescence and immunoblotting) were used. Variations at either a quantitative or a qualitative level were observed for some antigens, whereas no evident changes were apparent for others. In particular, the antigens detected by MBr1 and MOv15 on the MCF7 line both maintained high levels of expression and immunoblotting staining pattern, whereas the antigens detected by MOv2 on the HT29 and SW626 lines, although present at a high level, clearly changed their staining pattern. As regards the antigens recognized by MOv8 and MOv15 on the HT29 and SW626 lines, we observed a drastic decrease in the level of their expression and in many cases a drop below the threshold of detectability of the test. The intraabdominal carcinomatosis described partially mimics the growth characteristics of human ovarian cancer and maintains the expression of some antigenic markers associated with epithelial tumors of the ovary and may therefore be useful in devising immunodiagnostic and/or immunotherapeutic strategies for ovarian carcinoma.
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Sheid B, Boyce J. Inhibition of lymphocyte mitogenesis by factor(s) released from macrophages isolated from ascitic fluid of advanced ovarian cancer patients. Cancer Immunol Immunother 1984; 17:190-4. [PMID: 6332671 PMCID: PMC11039279 DOI: 10.1007/bf00205484] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/1983] [Accepted: 05/04/1984] [Indexed: 01/19/2023]
Abstract
Ascitic fluid from women with advanced ovarian carcinomas was shown to contain factor(s) which inhibit(s) T lymphocyte mitogenesis. The factor(s) was (were) demonstrated to be associated with the infiltrating macrophages. The inhibition was reversible and inhibited mitogenesis at some late event in the cell cycle. The inhibitory substance(s) was (were) noncytotoxic, dialyzable, heat-stable at 70 degrees C for 10 min (but unstable at 100 degrees C for 15 min), and partially resistant to protease treatment (55%-70%). Further experiments demonstrated that macrophages isolated from the ascitic fluid of patients with cirrhosis of the liver also released factor(s) which inhibit(s) T lymphocyte mitogenesis. On the basis of our data and data from other investigators, we propose that in advanced human ovarian cancer of epithelial origin, macrophages which infiltrate the ascitic fluid elaborate nonspecific inhibitors of T lymphocyte blastogenesis within the proximal environment, resulting in localized immunosuppression and the subsequent enhancement of metastasis within the peritoneal cavity, the tumor cells themselves being resistant to the cytocidal action of the macrophages due to genetic selection and/or their inherent biochemical ability to circumvent normal immunosurveillance mechanisms. This may account, at least in part, for the rapid metastasis and poor prognosis of human ovarian adenocarcinomas.
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