1
|
Dinkins K, Barton W, Wheeler L, Smith HJ, Mythreye K, Arend RC. Targeted therapy in high grade serous ovarian Cancer: A literature review. Gynecol Oncol Rep 2024; 54:101450. [PMID: 39092168 PMCID: PMC11292514 DOI: 10.1016/j.gore.2024.101450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 06/27/2024] [Accepted: 06/27/2024] [Indexed: 08/04/2024] Open
Abstract
Ovarian cancer continues to have a high mortality rate despite therapeutic advances. Traditionally, treatment has focused on surgery followed by systemic platinum- based chemotherapy. Unfortunately, most patients develop resistance to platinum agents, highlighting the need for targeted therapies. PARP inhibitors and anti-angiogenic agents, such as bevacizumab, have more recently changed upfront therapy. Unfortunately, other targeted therapies including immunotherapy have not seen the same success. Emerging therapeutic targets and modalities such as small molecule tyrosine kinase inhibitors, lipid metabolism targeting agents, gene therapy, ribosome targeted drugs as well as several other therapeutic classes have been and are currently under investigation. In this review, we discuss targeted therapies in high grade serous ovarian cancer from preclinical studies to phase III clinical trials.
Collapse
Affiliation(s)
- Kaitlyn Dinkins
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
| | - Wade Barton
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
| | - Lauren Wheeler
- Lister Hill Library, University of Alabama at Birmingham, Birmingham, AL
| | - Haller J. Smith
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
| | - Karthikeyan Mythreye
- Department of Pathology, O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
| | - Rebecca C. Arend
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
| |
Collapse
|
2
|
Chen L, Tang Q, Zhang K, Huang Q, Ding Y, Jin B, Liu S, Hwa K, Chou CJ, Zhang Y, Thyparambil S, Liao W, Han Z, Mortensen R, Schilling J, Li Z, Heaton R, Tian L, Cohen HJ, Sylvester KG, Arent RC, Zhao X, McElhinney DB, Wu Y, Bai W, Ling XB. Altered expression of the L-arginine/nitric oxide pathway in ovarian cancer: metabolic biomarkers and biological implications. BMC Cancer 2023; 23:844. [PMID: 37684587 PMCID: PMC10492322 DOI: 10.1186/s12885-023-11192-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 07/19/2023] [Indexed: 09/10/2023] Open
Abstract
MOTIVATION Ovarian cancer (OC) is a highly lethal gynecological malignancy. Extensive research has shown that OC cells undergo significant metabolic alterations during tumorigenesis. In this study, we aim to leverage these metabolic changes as potential biomarkers for assessing ovarian cancer. METHODS A functional module-based approach was utilized to identify key gene expression pathways that distinguish different stages of ovarian cancer (OC) within a tissue biopsy cohort. This cohort consisted of control samples (n = 79), stage I/II samples (n = 280), and stage III/IV samples (n = 1016). To further explore these altered molecular pathways, minimal spanning tree (MST) analysis was applied, leading to the formulation of metabolic biomarker hypotheses for OC liquid biopsy. To validate, a multiple reaction monitoring (MRM) based quantitative LCMS/MS method was developed. This method allowed for the precise quantification of targeted metabolite biomarkers using an OC blood cohort comprising control samples (n = 464), benign samples (n = 3), and OC samples (n = 13). RESULTS Eleven functional modules were identified as significant differentiators (false discovery rate, FDR < 0.05) between normal and early-stage, or early-stage and late-stage ovarian cancer (OC) tumor tissues. MST analysis revealed that the metabolic L-arginine/nitric oxide (L-ARG/NO) pathway was reprogrammed, and the modules related to "DNA replication" and "DNA repair and recombination" served as anchor modules connecting the other nine modules. Based on this analysis, symmetric dimethylarginine (SDMA) and arginine were proposed as potential liquid biopsy biomarkers for OC assessment. Our quantitative LCMS/MS analysis on our OC blood cohort provided direct evidence supporting the use of the SDMA-to-arginine ratio as a liquid biopsy panel to distinguish between normal and OC samples, with an area under the ROC curve (AUC) of 98.3%. CONCLUSION Our comprehensive analysis of tissue genomics and blood quantitative LC/MSMS metabolic data shed light on the metabolic reprogramming underlying OC pathophysiology. These findings offer new insights into the potential diagnostic utility of the SDMA-to-arginine ratio for OC assessment. Further validation studies using adequately powered OC cohorts are warranted to fully establish the clinical effectiveness of this diagnostic test.
Collapse
Affiliation(s)
- Linfeng Chen
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Qiming Tang
- Shanghai Yunxiang Medical Technology Co., Ltd., Shanghai, China
- Binhai Industrial Technology Research Institute, Zhejiang University, Tianjin, China
| | - Keying Zhang
- Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing, China
| | | | | | - Bo Jin
- Tianjin Yunjian Medical Laboratory Institute Co., Ltd, Tianjin, China
| | - Szumam Liu
- School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - C James Chou
- School of Medicine, Stanford University, Stanford, CA, USA
| | - Yani Zhang
- Tianjin Yunjian Medical Laboratory Institute Co., Ltd, Tianjin, China
| | | | | | - Zhi Han
- School of Medicine, Stanford University, Stanford, CA, USA
| | | | | | - Zhen Li
- Shanghai Yunxiang Medical Technology Co., Ltd., Shanghai, China
- Binhai Industrial Technology Research Institute, Zhejiang University, Tianjin, China
| | | | - Lu Tian
- School of Medicine, Stanford University, Stanford, CA, USA
| | - Harvey J Cohen
- School of Medicine, Stanford University, Stanford, CA, USA
| | | | - Rebecca C Arent
- School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Xinyang Zhao
- School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Yumei Wu
- Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing, China.
| | - Wenpei Bai
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China.
| | - Xuefeng B Ling
- School of Medicine, Stanford University, Stanford, CA, USA.
| |
Collapse
|
3
|
Human Blood Serum Inhibits Ductal Carcinoma Cells BT474 Growth and Modulates Effect of HER2 Inhibition. Biomedicines 2022; 10:biomedicines10081914. [PMID: 36009461 PMCID: PMC9405390 DOI: 10.3390/biomedicines10081914] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 07/27/2022] [Accepted: 08/04/2022] [Indexed: 11/17/2022] Open
Abstract
Trastuzumab, a HER2-targeted antibody, is widely used for targeted therapy of HER2-positive breast cancer (BC) patients; yet, not all of them respond to this treatment. We investigated here whether trastuzumab activity on the growth of HER2-overexpressing BT474 cells may interfere with human peripheral blood endogenous factors. Among 33 individual BC patient blood samples supplemented to the media, BT474 sensitivity to trastuzumab varied up to 14 times. In the absence of trastuzumab, human peripheral blood serum samples could inhibit growth of BT474, and this effect varied ~10 times for 50 individual samples. In turn, the epidermal growth factor (EGF) suppressed the trastuzumab effect on BT474 cell growth. Trastuzumab treatment increased the proportion of BT474 cells in the G0/G1 phases of cell cycle, while simultaneous addition of EGF decreased it, yet not to the control level. We used RNA sequencing profiling of gene expression to elucidate the molecular mechanisms involved in EGF- and human-sera-mediated attenuation of the trastuzumab effect on BT474 cell growth. Bioinformatic analysis of the molecular profiles suggested that trastuzumab acts similarly to the inhibition of PI3K/Akt/mTOR signaling axis, and the mechanism of EGF suppression of trastuzumab activity may be associated with parallel activation of PKC and transcriptional factors ETV1-ETV5.
Collapse
|
4
|
Fuzheng Jiedu Decoction Induces Apoptosis and Enhances Cisplatin Efficacy in Ovarian Cancer Cells In Vitro and In Vivo through Inhibiting the PI3K/AKT/mTOR/NF-κB Signaling Pathway. BIOMED RESEARCH INTERNATIONAL 2022; 2022:5739909. [PMID: 35281608 PMCID: PMC8906977 DOI: 10.1155/2022/5739909] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/21/2022] [Accepted: 02/09/2022] [Indexed: 12/11/2022]
Abstract
Objectives This study is aimed at investigating the anticancer activity of Fuzheng Jiedu decoction (FJD) alone or in combination with cisplatin in ovarian cancer (OC) models, as well as its underlying mechanisms of action. Methods The anticancer activities of FJD, cisplatin, and the combination of the PI3K inhibitor (LY294002, LY) or activator (IGF-1) were evaluated in OC cell lines in vitro and in a SKOV3 xenograft mouse model in vivo. The cell proliferation and invasion ability were measured using MTT, EdU, and transwell assays, respectively. The cell apoptosis was examined by flow cytometry and JC-1 assays. The expression levels of the Bcl-2 family and the PI3K/AKT/mTOR/NF-κB pathway-related proteins were analyzed by Western blot. Results The in vivo and in vitro studies showed that FJD administration could significantly inhibit cell proliferation and promote cell apoptosis in two OC cell lines SKOV3 and 3AO and partially decreased the tumor volumes and weights. In addition, FJD could significantly downregulate the protein levels of p-PI3K/PI3K, p-AKT/AKT, p-mTOR/mTOR, NF-κB, p38, and Bcl-2 and upregulate the Bax, Cyt-C, and cleaved caspase-3 in OC tumor tissues and cells. FJD cotreatment increased the efficacy of cisplatin, including inhibiting OC cell proliferation and invasion, promoting cell apoptosis, and inhibiting the PI3K/AKT/mTOR signaling pathway, while this enhancement was suppressed by IGF-1. Similarly, LY also enhanced the anticancer efficacy of cisplatin. Conclusions This study indicated that FJD could improve the efficacy of cisplatin by inhibiting the PI3K/AKT/mTOR/NF-κB signaling pathway. It is suggested that FJD may be a valuable adjuvant drug for the treatment of OC.
Collapse
|
5
|
Huang D, Chowdhury S, Wang H, Savage SR, Ivey RG, Kennedy JJ, Whiteaker JR, Lin C, Hou X, Oberg AL, Larson MC, Eskandari N, Delisi DA, Gentile S, Huntoon CJ, Voytovich UJ, Shire ZJ, Yu Q, Gygi SP, Hoofnagle AN, Herbert ZT, Lorentzen TD, Calinawan A, Karnitz LM, Weroha SJ, Kaufmann SH, Zhang B, Wang P, Birrer MJ, Paulovich AG. Multiomic analysis identifies CPT1A as a potential therapeutic target in platinum-refractory, high-grade serous ovarian cancer. Cell Rep Med 2021; 2:100471. [PMID: 35028612 PMCID: PMC8714940 DOI: 10.1016/j.xcrm.2021.100471] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 09/24/2021] [Accepted: 11/19/2021] [Indexed: 12/14/2022]
Abstract
Resistance to platinum compounds is a major determinant of patient survival in high-grade serous ovarian cancer (HGSOC). To understand mechanisms of platinum resistance and identify potential therapeutic targets in resistant HGSOC, we generated a data resource composed of dynamic (±carboplatin) protein, post-translational modification, and RNA sequencing (RNA-seq) profiles from intra-patient cell line pairs derived from 3 HGSOC patients before and after acquiring platinum resistance. These profiles reveal extensive responses to carboplatin that differ between sensitive and resistant cells. Higher fatty acid oxidation (FAO) pathway expression is associated with platinum resistance, and both pharmacologic inhibition and CRISPR knockout of carnitine palmitoyltransferase 1A (CPT1A), which represents a rate limiting step of FAO, sensitize HGSOC cells to platinum. The results are further validated in patient-derived xenograft models, indicating that CPT1A is a candidate therapeutic target to overcome platinum resistance. All multiomic data can be queried via an intuitive gene-query user interface (https://sites.google.com/view/ptrc-cell-line).
Collapse
Affiliation(s)
- Dongqing Huang
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Shrabanti Chowdhury
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Hong Wang
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Sara R. Savage
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Richard G. Ivey
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Jacob J. Kennedy
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Jeffrey R. Whiteaker
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Chenwei Lin
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Xiaonan Hou
- Department of Oncology, Mayo Clinic, Rochester, MN 55905, USA
| | - Ann L. Oberg
- Department of Quantitative Health Sciences, Division of Computational Biology, Mayo Clinic, Rochester, MN 55905, USA
| | - Melissa C. Larson
- Department of Quantitative Health Sciences, Division of Clinical Trials and Biostatistics, Mayo Clinic, Rochester, MN 55905, USA
| | - Najmeh Eskandari
- Division of Hematology and Oncology, Department of Medicine, University of Illinois, Chicago, IL 60612, USA
| | - Davide A. Delisi
- Division of Hematology and Oncology, Department of Medicine, University of Illinois, Chicago, IL 60612, USA
| | - Saverio Gentile
- Division of Hematology and Oncology, Department of Medicine, University of Illinois, Chicago, IL 60612, USA
| | | | - Uliana J. Voytovich
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Zahra J. Shire
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Qing Yu
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Steven P. Gygi
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Andrew N. Hoofnagle
- Department of Lab Medicine, University of Washington, Seattle, WA 98195, USA
| | - Zachary T. Herbert
- Molecular Biology Core Facilities, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Travis D. Lorentzen
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Anna Calinawan
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | | | - S. John Weroha
- Department of Oncology, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Bing Zhang
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Pei Wang
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Michael J. Birrer
- University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Amanda G. Paulovich
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| |
Collapse
|
6
|
Sun JY, Ni MM. Long non-coding RNA HEIH: a novel tumor activator in multiple cancers. Cancer Cell Int 2021; 21:558. [PMID: 34689775 PMCID: PMC8543845 DOI: 10.1186/s12935-021-02272-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/16/2021] [Indexed: 12/27/2022] Open
Abstract
The last decade has witnessed the altered expression levels of long non-coding RNA HEIH in different types of cancer. More than half of the HEIH studies in cancer have been published within the last two years. To our knowledge, this is the first review to discuss very recent developments and insights into HEIH contribution to carcinogenesis. The functional role, molecular mechanism, and clinical significance of HEIH in human cancers are described in detail. The expression of HEIH is elevated in a broad spectrum of cancers, and its disorder contributes to cell proliferation, migration, invasion, and drug resistance of cancer cells through different underlying mechanisms. In addition, the high expression of HEIH is significantly associated with advanced tumor stage, tumor size and decreased overall survival, suggesting HEIH may function as a prognostic biomarker and potential therapeutic target for human cancers.
Collapse
Affiliation(s)
- Jie-Yu Sun
- Department of Pharmacy, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, People's Republic of China
| | - Ming-Ming Ni
- Department of Pharmacy, Children's Hospital of Nanjing Medical University, 72 Guangzhou Rd., Nanjing, 210008, People's Republic of China.
| |
Collapse
|
7
|
Kang J, Brajanovski N, Chan KT, Xuan J, Pearson RB, Sanij E. Ribosomal proteins and human diseases: molecular mechanisms and targeted therapy. Signal Transduct Target Ther 2021; 6:323. [PMID: 34462428 PMCID: PMC8405630 DOI: 10.1038/s41392-021-00728-8] [Citation(s) in RCA: 125] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 07/12/2021] [Accepted: 07/30/2021] [Indexed: 02/07/2023] Open
Abstract
Ribosome biogenesis and protein synthesis are fundamental rate-limiting steps for cell growth and proliferation. The ribosomal proteins (RPs), comprising the structural parts of the ribosome, are essential for ribosome assembly and function. In addition to their canonical ribosomal functions, multiple RPs have extra-ribosomal functions including activation of p53-dependent or p53-independent pathways in response to stress, resulting in cell cycle arrest and apoptosis. Defects in ribosome biogenesis, translation, and the functions of individual RPs, including mutations in RPs have been linked to a diverse range of human congenital disorders termed ribosomopathies. Ribosomopathies are characterized by tissue-specific phenotypic abnormalities and higher cancer risk later in life. Recent discoveries of somatic mutations in RPs in multiple tumor types reinforce the connections between ribosomal defects and cancer. In this article, we review the most recent advances in understanding the molecular consequences of RP mutations and ribosomal defects in ribosomopathies and cancer. We particularly discuss the molecular basis of the transition from hypo- to hyper-proliferation in ribosomopathies with elevated cancer risk, a paradox termed "Dameshek's riddle." Furthermore, we review the current treatments for ribosomopathies and prospective therapies targeting ribosomal defects. We also highlight recent advances in ribosome stress-based cancer therapeutics. Importantly, insights into the mechanisms of resistance to therapies targeting ribosome biogenesis bring new perspectives into the molecular basis of cancer susceptibility in ribosomopathies and new clinical implications for cancer therapy.
Collapse
Affiliation(s)
- Jian Kang
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia
| | - Natalie Brajanovski
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia
| | - Keefe T. Chan
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia
| | - Jiachen Xuan
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia
| | - Richard B. Pearson
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia ,grid.1002.30000 0004 1936 7857Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Biochemistry and Molecular Biology, University of Melbourne, Melbourne, VIC Australia
| | - Elaine Sanij
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Clinical Pathology, University of Melbourne, Melbourne, VIC Australia ,grid.1073.50000 0004 0626 201XSt. Vincent’s Institute of Medical Research, Fitzroy, VIC Australia
| |
Collapse
|
8
|
Kim HG, Huot JR, Pin F, Guo B, Bonetto A, Nader GA. Reduced rDNA transcription diminishes skeletal muscle ribosomal capacity and protein synthesis in cancer cachexia. FASEB J 2021; 35:e21335. [PMID: 33527503 PMCID: PMC7863588 DOI: 10.1096/fj.202002257r] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/07/2020] [Accepted: 12/16/2020] [Indexed: 12/18/2022]
Abstract
Muscle wasting in cancer is associated with deficits in protein synthesis, yet, the mechanisms underlying this anabolic impairment remain poorly understood. The capacity for protein synthesis is mainly determined by the abundance of muscle ribosomes, which is in turn regulated by transcription of the ribosomal (r)RNA genes (rDNA). In this study, we investigated whether muscle loss in a preclinical model of ovarian cancer is associated with a reduction in ribosomal capacity and was a consequence of impaired rDNA transcription. Tumor bearing resulted in a significant loss in gastrocnemius muscle weight and protein synthesis capacity, and was consistent with a significant reduction in rDNA transcription and ribosomal capacity. Despite the induction of the ribophagy receptor NUFIP1 mRNA and the loss of NUFIP1 protein, in vitro studies revealed that while inhibition of autophagy rescued NUFIP1, it did not prevent the loss of rRNA. Electrophoretic analysis of rRNA fragmentation from both in vivo and in vitro models showed no evidence of endonucleolytic cleavage, suggesting that rRNA degradation may not play a major role in modulating muscle ribosome abundance. Our results indicate that in this model of ovarian cancer-induced cachexia, the ability of skeletal muscle to synthesize protein is compromised by a reduction in rDNA transcription and consequently a lower ribosomal capacity. Thus, impaired ribosomal production appears to play a key role in the anabolic deficits associated with muscle wasting in cancer cachexia.
Collapse
Affiliation(s)
- Hyo-Gun Kim
- Department of Kinesiology, The Pennsylvania State University, University Park, PA, USA
| | - Joshua R Huot
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Fabrizio Pin
- Department of Anatomy and Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Bin Guo
- Department of Kinesiology, The Pennsylvania State University, University Park, PA, USA
| | - Andrea Bonetto
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Anatomy and Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, USA.,Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Gustavo A Nader
- Department of Kinesiology, The Pennsylvania State University, University Park, PA, USA.,Penn State Cancer Institute, The Pennsylvania State University, University Park, PA, USA.,Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, USA
| |
Collapse
|
9
|
Chu Y, Zhu C, Wang Q, Liu M, Wan W, Zhou J, Han R, Yang J, Luo W, Liu C, Zhou H, Li M, Yu F, Ye Y. Adipose-derived mesenchymal stem cells induced PAX8 promotes ovarian cancer cell growth by stabilizing TAZ protein. J Cell Mol Med 2021; 25:4434-4443. [PMID: 33830648 PMCID: PMC8093979 DOI: 10.1111/jcmm.16511] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 02/14/2021] [Accepted: 03/03/2021] [Indexed: 12/17/2022] Open
Abstract
Our previous studies have shown that the Adipose‐derived mesenchymal stem cells (ADSCs) can regulate metastasis and development of ovarian cancer. However, its specific mechanism has yet to be fully revealed. In this study, an RNA‐seq approach was adopted to compare the differences in mRNA levels in ovarian cancer cells being given or not given ADSCs. The mRNA level of paired box 8 (PAX8) changed significantly and was confirmed as an important factor in tumour‐inducing effect of ADSCs. In comparison with the ovarian cancer cells cultured in the common growth medium, those cultured in the medium supplemented with ADSCs showed a significant increase of the PAX8 level. Moreover, the cancer cell growth could be restricted, even in the ADSC‐treated group (P < .05), by inhibiting PAX8. In addition, an overexpression of PAX8 could elevate the proliferation of ovarian cancer cells. Moreover, Co‐IP assays in ovarian cancer cells revealed that an interaction existed between endogenous PAX8 and TAZ. And the PAX8 levels regulated the degradation of TAZ. The bioluminescence images captured in vivo manifested that the proliferation and the PAX8 expression level in ovarian cancers increased in the ADMSC‐treated group, and the effect of ADSCs in promoting tumours was weakened through inhibiting PAX8. Our findings indicate that the PAX8 expression increment could contribute a role in promoting the ADSC‐induced ovarian cancer cell proliferation through TAZ stability regulation.
Collapse
Affiliation(s)
- Yijing Chu
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Chengzhan Zhu
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qianqian Wang
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Meixin Liu
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Wei Wan
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jun Zhou
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Rendong Han
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jing Yang
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Wenqiang Luo
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Chong Liu
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Huansheng Zhou
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Min Li
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Fengsheng Yu
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yuanhua Ye
- Department of Obstetrics, The Affiliated Hospital of Qingdao University, Qingdao, China
| |
Collapse
|
10
|
The RNA polymerase I transcription inhibitor CX-5461 cooperates with topoisomerase 1 inhibition by enhancing the DNA damage response in homologous recombination-proficient high-grade serous ovarian cancer. Br J Cancer 2020; 124:616-627. [PMID: 33173151 PMCID: PMC7851142 DOI: 10.1038/s41416-020-01158-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 10/05/2020] [Accepted: 10/22/2020] [Indexed: 02/08/2023] Open
Abstract
Background Intrinsic and acquired drug resistance represent fundamental barriers to the cure of high-grade serous ovarian carcinoma (HGSC), the most common histological subtype accounting for the majority of ovarian cancer deaths. Defects in homologous recombination (HR) DNA repair are key determinants of sensitivity to chemotherapy and poly-ADP ribose polymerase inhibitors. Restoration of HR is a common mechanism of acquired resistance that results in patient mortality, highlighting the need to identify new therapies targeting HR-proficient disease. We have shown promise for CX-5461, a cancer therapeutic in early phase clinical trials, in treating HR-deficient HGSC. Methods Herein, we screen the whole protein-coding genome to identify potential targets whose depletion cooperates with CX-5461 in HR-proficient HGSC. Results We demonstrate robust proliferation inhibition in cells depleted of DNA topoisomerase 1 (TOP1). Combining the clinically used TOP1 inhibitor topotecan with CX-5461 potentiates a G2/M cell cycle checkpoint arrest in multiple HR-proficient HGSC cell lines. The combination enhances a nucleolar DNA damage response and global replication stress without increasing DNA strand breakage, significantly reducing clonogenic survival and tumour growth in vivo. Conclusions Our findings highlight the possibility of exploiting TOP1 inhibition to be combined with CX-5461 as a non-genotoxic approach in targeting HR-proficient HGSC.
Collapse
|
11
|
Mars JC, Tremblay MG, Valere M, Sibai DS, Sabourin-Felix M, Lessard F, Moss T. The chemotherapeutic agent CX-5461 irreversibly blocks RNA polymerase I initiation and promoter release to cause nucleolar disruption, DNA damage and cell inviability. NAR Cancer 2020; 2:zcaa032. [PMID: 33196044 PMCID: PMC7646227 DOI: 10.1093/narcan/zcaa032] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 10/13/2020] [Accepted: 10/20/2020] [Indexed: 01/02/2023] Open
Abstract
In the search for drugs to effectively treat cancer, the last 10 years have seen a resurgence of interest in targeting ribosome biogenesis. CX-5461 is a potential inhibitor of ribosomal RNA synthesis that is now showing promise in phase I trials as a chemotherapeutic agent for a range of malignancies. Here, we show that CX-5461 irreversibly inhibits ribosomal RNA transcription by arresting RNA polymerase I (RPI/Pol1/PolR1) in a transcription initiation complex. CX-5461 does not achieve this by preventing formation of the pre-initiation complex nor does it affect the promoter recruitment of the SL1 TBP complex or the HMGB-box upstream binding factor (UBF/UBTF). CX-5461 also does not prevent the subsequent recruitment of the initiation-competent RPI–Rrn3 complex. Rather, CX-5461 blocks promoter release of RPI–Rrn3, which remains irreversibly locked in the pre-initiation complex even after extensive drug removal. Unexpectedly, this results in an unproductive mode of RPI recruitment that correlates with the onset of nucleolar stress, inhibition of DNA replication, genome-wide DNA damage and cellular senescence. Our data demonstrate that the cytotoxicity of CX-5461 is at least in part the result of an irreversible inhibition of RPI transcription initiation and hence are of direct relevance to the design of improved strategies of chemotherapy.
Collapse
Affiliation(s)
- Jean-Clément Mars
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre (CRCHU de Québec-Université Laval), Québec, QC, G1R 3S3, Canada
| | - Michel G Tremblay
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre (CRCHU de Québec-Université Laval), Québec, QC, G1R 3S3, Canada
| | - Mélissa Valere
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre (CRCHU de Québec-Université Laval), Québec, QC, G1R 3S3, Canada
| | - Dany S Sibai
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre (CRCHU de Québec-Université Laval), Québec, QC, G1R 3S3, Canada
| | - Marianne Sabourin-Felix
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre (CRCHU de Québec-Université Laval), Québec, QC, G1R 3S3, Canada
| | - Frédéric Lessard
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre (CRCHU de Québec-Université Laval), Québec, QC, G1R 3S3, Canada
| | - Tom Moss
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre (CRCHU de Québec-Université Laval), Québec, QC, G1R 3S3, Canada
| |
Collapse
|
12
|
Son J, Hannan KM, Poortinga G, Hein N, Cameron DP, Ganley ARD, Sheppard KE, Pearson RB, Hannan RD, Sanij E. rDNA Chromatin Activity Status as a Biomarker of Sensitivity to the RNA Polymerase I Transcription Inhibitor CX-5461. Front Cell Dev Biol 2020; 8:568. [PMID: 32719798 PMCID: PMC7349920 DOI: 10.3389/fcell.2020.00568] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 06/15/2020] [Indexed: 12/13/2022] Open
Abstract
Hyperactivation of RNA polymerase I (Pol I) transcription of ribosomal RNA (rRNA) genes (rDNA) is a key determinant of growth and proliferation and a consistent feature of cancer cells. We have demonstrated that inhibition of rDNA transcription by the Pol I transcription inhibitor CX-5461 selectively kills tumor cells in vivo. Moreover, the first-in human trial of CX-5461 has demonstrated CX-5461 is well-tolerated in patients and has single-agent anti-tumor activity in hematologic malignancies. However, the mechanisms underlying tumor cell sensitivity to CX-5461 remain unclear. Understanding these mechanisms is crucial for the development of predictive biomarkers of response that can be utilized for stratifying patients who may benefit from CX-5461. The rDNA repeats exist in four different and dynamic chromatin states: inactive rDNA can be either methylated silent or unmethylated pseudo-silent; while active rDNA repeats are described as either transcriptionally competent but non-transcribed or actively transcribed, depending on the level of rDNA promoter methylation, loading of the essential rDNA chromatin remodeler UBF and histone marks status. In addition, the number of rDNA repeats per human cell can reach hundreds of copies. Here, we tested the hypothesis that the number and/or chromatin status of the rDNA repeats, is a critical determinant of tumor cell sensitivity to Pol I therapy. We systematically examined a panel of ovarian cancer (OVCA) cell lines to identify rDNA chromatin associated biomarkers that might predict sensitivity to CX-5461. We demonstrated that an increased proportion of active to inactive rDNA repeats, independent of rDNA copy number, determines OVCA cell line sensitivity to CX-5461. Further, using zinc finger nuclease genome editing we identified that reducing rDNA copy number leads to an increase in the proportion of active rDNA repeats and confers sensitivity to CX-5461 but also induces genome-wide instability and sensitivity to DNA damage. We propose that the proportion of active to inactive rDNA repeats may serve as a biomarker to identify cancer patients who will benefit from CX-5461 therapy in future clinical trials. The data also reinforces the notion that rDNA instability is a threat to genomic integrity and cellular homeostasis.
Collapse
Affiliation(s)
- Jinbae Son
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia
| | - Katherine M. Hannan
- ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
- Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, VIC, Australia
| | - Gretchen Poortinga
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia
- Department of Medicine, St. Vincent’s Hospital, The University of Melbourne, Parkville, VIC, Australia
| | - Nadine Hein
- ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
| | - Donald P. Cameron
- ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
| | - Austen R. D. Ganley
- School of Biological Sciences, The University of Auckland, Auckland, New Zealand
| | - Karen E. Sheppard
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia
- Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, VIC, Australia
| | - Richard B. Pearson
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia
- Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, VIC, Australia
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia
| | - Ross D. Hannan
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia
- ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
- Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, VIC, Australia
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, Australia
| | - Elaine Sanij
- Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia
- Department of Clinical Pathology, The University of Melbourne, Parkville, VIC, Australia
| |
Collapse
|
13
|
Noreen S, Gardner QA, Fatima I, Sadaf S, Akhtar MW. Upregulated Expression of Calcium-Dependent Annexin A6: A Potential Biomarker of Ovarian Carcinoma. Proteomics Clin Appl 2020; 14:e1900078. [PMID: 31747122 DOI: 10.1002/prca.201900078] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 11/04/2019] [Indexed: 01/23/2023]
Abstract
PURPOSE An early and accurate diagnosis of ovarian carcinoma (OC) may reduce morbidity and mortality of the patients. To improve the clinical outcome in OC patients, the present study is aimed at identifying robust biomarkers for early OC diagnosis. EXPERIMENTAL DESIGN: In order to look for early-stage protein markers, a systematic protein profiling approach involving 2-dimensional electrophoresis coupled with mass spectrometric analyses of human malignant and non-malignant ovarian biopsy samples, is performed. RESULTS Six 2D gel spots, corresponding to five proteins, display statistically significant differential expression in the tumor tissues compared to benign controls (FDR ≤ 0.05; PMF score ≥ 79). Ingenuity pathway analysis predicts two proteins, that is, Ca2+ -dependent membrane-binding protein annexin A6 (AnxA6) and the metabolic enzyme l-lactate dehydrogenase A chain, as potential predictive biomarkers. Increased expression of AnxA6 is further ascertained by Western blot and enzyme linked immunosorbent assay in the resected tissues and the plasma samples. The expression is found markedly increasing particularly in the advanced stage tumors. CONCLUSIONS AND CLINICAL RELEVANCE The significant upregulation of AnxA6 in OC, reported for the first time, is likely to provide insight into the mechanism of OC progression, which may lead to the design of potential diagnostic and therapeutic strategies.
Collapse
Affiliation(s)
- Shahzadi Noreen
- School of Biological Sciences, University of the Punjab, Lahore, 54590, Pakistan
| | | | - Iram Fatima
- School of Biological Sciences, University of the Punjab, Lahore, 54590, Pakistan
| | - Saima Sadaf
- Institute of Biochemistry and Biotechnology, University of the Punjab, Lahore, 54590, Pakistan
| | | |
Collapse
|
14
|
Qi ZY, Wang F, Yue YY, Guo XW, Guo RM, Li HL, Xu YY. CYPA promotes the progression and metastasis of serous ovarian cancer (SOC) in vitro and in vivo. J Ovarian Res 2019; 12:118. [PMID: 31783885 PMCID: PMC6884760 DOI: 10.1186/s13048-019-0593-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 11/14/2019] [Indexed: 12/12/2022] Open
Abstract
Ovarian cancer (OC) is a type of gynaecological malignancy with high mortality in females. Serous ovarian cancer (SOC) is a distinct subtype of OC with poor early diagnosis. Given the limitations of traditional therapies, such as chemotherapy, targeted treatment is therefore a promising therapy to improve the survival rate of SOC patients. Cyclophilin A (CYPA) is a member of Cyclophilin family and thought to participates in multiple cellular processes such as cell transduction and immune modulation. Recently, various of studies indicated that CYPA has critical impact on cancer progression. CYPA could regulate cell proliferation, invasion, and chemoresistance of multiple types of cancers. However, it is still unclear whether it could affect ovarian cancer. In this study, we demonstrated that CYPA was highly expressed in SOC tissues compared with adjacent tissues. Further, CYPA was significantly associated with clinical stage and lymphnode metastasis of SOC patients. Additionally, data indicated that knockdown of CYPA by its shRNA dramatically reduces migration and invasion capacity of SOC cells in vitro and blocks tumor metastasis in vivo. Our study investigates the involvement of CYPA in the progression and metastasis of SOC, and therefore provides CYPA as a promising therapeutic target for SOC treatment.
Collapse
Affiliation(s)
- Zhi-Ying Qi
- Department of gynecolog, the second hospital of Tianjin medical university, No.23 Pingjiang road, Hexi district, Tianjin, 300211 China
| | - Fang Wang
- Department of gynecolog, the second hospital of Tianjin medical university, No.23 Pingjiang road, Hexi district, Tianjin, 300211 China
| | - Ying-Ying Yue
- Department of gynecolog, the second hospital of Tianjin medical university, No.23 Pingjiang road, Hexi district, Tianjin, 300211 China
| | - Xue-Wang Guo
- Department of gynecolog, the second hospital of Tianjin medical university, No.23 Pingjiang road, Hexi district, Tianjin, 300211 China
| | - Rui-Meng Guo
- Department of gynecolog, the second hospital of Tianjin medical university, No.23 Pingjiang road, Hexi district, Tianjin, 300211 China
| | - Hong-Lin Li
- Department of gynecolog, the second hospital of Tianjin medical university, No.23 Pingjiang road, Hexi district, Tianjin, 300211 China
| | - Yan-Ying Xu
- Department of gynecolog, the second hospital of Tianjin medical university, No.23 Pingjiang road, Hexi district, Tianjin, 300211 China
| |
Collapse
|
15
|
Keil M, Meyer MT, Dannheisig DP, Maerz LD, Philipp M, Pfister AS. Loss of Peter Pan protein is associated with cell cycle defects and apoptotic events. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1866:882-895. [DOI: 10.1016/j.bbamcr.2019.01.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 12/21/2018] [Accepted: 01/23/2019] [Indexed: 12/19/2022]
|
16
|
Crosstalk between NF-κB and Nucleoli in the Regulation of Cellular Homeostasis. Cells 2018; 7:cells7100157. [PMID: 30301139 PMCID: PMC6210184 DOI: 10.3390/cells7100157] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 09/28/2018] [Accepted: 10/03/2018] [Indexed: 12/30/2022] Open
Abstract
Nucleoli are emerging as key sensors of cellular stress and regulators of the downstream consequences on proliferation, metabolism, senescence, and apoptosis. NF-κB signalling is activated in response to a similar plethora of stresses, which leads to modulation of cell growth and death programs. While nucleolar and NF-κB pathways are distinct, it is increasingly apparent that they converge at multiple levels. Exposure of cells to certain insults causes a specific type of nucleolar stress that is characterised by degradation of the PolI complex component, TIF-IA, and increased nucleolar size. Recent studies have shown that this atypical nucleolar stress lies upstream of cytosolic IκB degradation and NF-κB nuclear translocation. Under these stress conditions, the RelA component of NF-κB accumulates within functionally altered nucleoli to trigger a nucleophosmin dependent, apoptotic pathway. In this review, we will discuss these points of crosstalk and their relevance to anti-tumour mechanism of aspirin and small molecule CDK4 inhibitors. We will also briefly the discuss how crosstalk between nucleoli and NF-κB signalling may be more broadly relevant to the regulation of cellular homeostasis and how it may be exploited for therapeutic purpose.
Collapse
|
17
|
Undermining ribosomal RNA transcription in both the nucleolus and mitochondrion: an offbeat approach to target MYC-driven cancer. Oncotarget 2018; 9:5016-5031. [PMID: 29435159 PMCID: PMC5797030 DOI: 10.18632/oncotarget.23579] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 12/09/2017] [Indexed: 01/09/2023] Open
Abstract
The MYC transcription factor coordinates, via different RNA polymerases, the transcription of both ribosomal RNA (rRNA) and protein genes necessary for nucleolar as well as mitochondrial ribogenesis. In this study we tested if MYC-coordination of rRNA transcription in the nucleolus and in the mitochondrion drives (cancer) cell proliferation. Here we show that the anti-proliferative effect of CX-5461, a Pol I inhibitor of rRNA transcription, in ovarian (cancer) cell contexts characterized by MYC overexpression is enhanced either by 2'-C-Methyl Adenosine (2'-C-MeA), a ribonucleoside that inhibits POLRMT mitochondrial rRNA (mt-rRNA) transcription and doxycycline, a tetracycline known to affect mitochondrial translation. Thus, hindering not only mt-rRNA transcription, but also mitoribosome function in MYC-overexpressing ovarian (cancer) cells, potentiates the antiproliferative effect of CX-5461. Targeting MYC-regulated rRNA transcription and ribogenesis in both the nucleolus and mitochondrion seems to be a novel approach worth of consideration for treating MYC-driven cancer.
Collapse
|
18
|
Emerging Therapeutics to Overcome Chemoresistance in Epithelial Ovarian Cancer: A Mini-Review. Int J Mol Sci 2017; 18:ijms18102171. [PMID: 29057791 PMCID: PMC5666852 DOI: 10.3390/ijms18102171] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 10/13/2017] [Accepted: 10/16/2017] [Indexed: 12/14/2022] Open
Abstract
Ovarian cancer is the fifth leading cause of cancer death among women and the most lethal gynecologic malignancy. One of the leading causes of death in high-grade serous ovarian cancer (HGSOC) is chemoresistant disease, which may present as intrinsic or acquired resistance to therapies. Here we discuss some of the known molecular mechanisms of chemoresistance that have been exhaustively investigated in chemoresistant ovarian cancer, including drug efflux pump multidrug resistance protein 1 (MDR1), the epithelial–mesenchymal transition, DNA damage and repair capacity. We also discuss novel therapeutics that may address some of the challenges in bringing approaches that target chemoresistant processes from bench to bedside. Some of these new therapies include novel drug delivery systems, targets that may halt adaptive changes in the tumor, exploitation of tumor mutations that leave cancer cells vulnerable to irreversible damage, and novel drugs that target ribosomal biogenesis, a process that may be uniquely different in cancer versus non-cancerous cells. Each of these approaches, or a combination of them, may provide a greater number of positive outcomes for a broader population of HGSOC patients.
Collapse
|