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Chen WJ, Sung WW, Yu CY, Luan YZ, Chang YC, Chen SL, Lee TH. PNU-74654 Suppresses TNFR1/IKB Alpha/p65 Signaling and Induces Cell Death in Testicular Cancer. Curr Issues Mol Biol 2022; 44:222-232. [PMID: 35723395 PMCID: PMC8928937 DOI: 10.3390/cimb44010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/29/2021] [Accepted: 01/02/2022] [Indexed: 11/16/2022] Open
Abstract
Testicular cancer (TC) is a rare malignancy worldwide and is the most common malignancy in males aged 15–44 years. The Wnt/β-catenin signaling pathway mediates numerous essential cellular functions and has potentially important effects on tumorigenesis and cancer progression. The search for drugs to inhibit this pathway has identified a small molecule, PNU-74654, as an inhibitor of the β-catenin/TCF4 interaction. We evaluated the therapeutic role of PNU-74654 in two TC cell lines, NCCIT and NTERA2, by measuring cell viability, cell cycle transition and cell death. Potential pathways were evaluated by protein arrays and Western blots. PNU-74654 decreased cell viability and induced apoptosis of TC cells, with significant increases in the sub G1, Hoechst-stained, Annexin V-PI-positive rates. PNU-74654 treatment of both TC cell lines inhibited the TNFR1/IKB alpha/p65 pathway and the execution phase of apoptosis. Our findings demonstrate that PNU-74654 can induce apoptosis in TC cells through mechanisms involving the execution phase of apoptosis and inhibition of TNFR1/IKB alpha/p65 signaling. Therefore, small molecules such as PNU-74654 may identify potential new treatment strategies for TC.
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Affiliation(s)
- Wen-Jung Chen
- Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; (W.-J.C.); (W.-W.S.)
- School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; (C.-Y.Y.); (Y.-Z.L.); (Y.-C.C.)
- Department of Urology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
| | - Wen-Wei Sung
- Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; (W.-J.C.); (W.-W.S.)
- School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; (C.-Y.Y.); (Y.-Z.L.); (Y.-C.C.)
- Department of Urology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
| | - Chia-Ying Yu
- School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; (C.-Y.Y.); (Y.-Z.L.); (Y.-C.C.)
| | - Yu-Ze Luan
- School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; (C.-Y.Y.); (Y.-Z.L.); (Y.-C.C.)
| | - Ya-Chuan Chang
- School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; (C.-Y.Y.); (Y.-Z.L.); (Y.-C.C.)
| | - Sung-Lang Chen
- School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; (C.-Y.Y.); (Y.-Z.L.); (Y.-C.C.)
- Department of Urology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
- Correspondence: (S.-L.C.); (T.-H.L.)
| | - Tsung-Hsien Lee
- Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; (W.-J.C.); (W.-W.S.)
- Department of Obstetrics and Gynecology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
- Division of Infertility Clinic, Lee Women’s Hospital, Taichung 40201, Taiwan
- Correspondence: (S.-L.C.); (T.-H.L.)
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2
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Lafin JT, Kenigsberg AP, Meng X, Abe D, Savelyeva A, Singla N, Woldu SL, Lotan Y, Mauck RJ, Lewis CM, Margulis V, Wong D, Jia L, Kapur P, Xu L, Speir RW, Chesnut GT, Frazier AL, Strand DW, Coleman N, Murray MJ, Amatruda JF, Bagrodia A. Serum Small RNA Sequencing and miR-375 Assay Do Not Identify the Presence of Pure Teratoma at Postchemotherapy Retroperitoneal Lymph Node Dissection. EUR UROL SUPPL 2021; 26:83-87. [PMID: 33997822 PMCID: PMC8121258 DOI: 10.1016/j.euros.2021.02.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Existing tumor markers for testicular germ cell tumor (TGCT) cannot detect the presence of pure teratoma. Serum miRNAs have strong performance detecting other subtypes of TGCT. Previous reports suggest high levels of miR-375 expression in teratoma tissue. The purpose of this study was to explore the role of serum miRNA, including miR-375, in detecting the presence of teratoma at postchemotherapy retroperitoneal lymph node dissection (PC-RPLND). We prospectively collected presurgical serum from 40 TGCT patients undergoing PC-RPLND (21 with teratoma at RPLND and 19 with no evidence of disease). We examined the utility of serum miR-375-3p and miR-375-5p by quantitative polymerase chain reaction, and searched for other putative serum miRNAs with small RNA sequencing. The area under the receiver operating characteristic curve (AUC) and univariate analyses were utilized to evaluate test characteristics and predictors of teratoma. Both serum miR-375-3p and miR-375-5p exhibited poor performance (miR-375-3p: 86% sensitivity, 32% specificity, AUC: 0.506; miR-375-5p: 55% sensitivity, 67% specificity, AUC: 0.556). Teratoma at orchiectomy was the only predictor of PC-RPLND teratoma. Small RNA sequencing identified three potentially discriminatory miRNAs, but further validation demonstrated no utility. Our results confirm prior reports that serum miR-375 cannot predict teratoma, and suggest that there may not exist a predictive serum miRNA for teratoma. Patient summary We found that serum miR-375 cannot detect the presence of teratoma at postchemotherapy retroperitoneal lymph node dissection (PC-RPLND). We are also unable to find any other serum miRNAs predictive of pure teratoma at PC-RPLND. Hence, the lack of a reliable circulating marker of teratoma remains a critical clinical need.
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Affiliation(s)
- John T Lafin
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | | | - Xiaosong Meng
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Dreaux Abe
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Anna Savelyeva
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Nirmish Singla
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Solomon L Woldu
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Yair Lotan
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ryan J Mauck
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Cheryl M Lewis
- Harold C. Simmons Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Vitaly Margulis
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Department of Urology, I.M. Sechenov First Moscow State University, Moscow, Russia
| | - Daniel Wong
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Liwei Jia
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Payal Kapur
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Lin Xu
- Quantitative Biomedical Research Center, Department of Population & Data Sciences, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ryan W Speir
- Department of Urology, Madigan Army Medical Center, Tacoma, WA, USA
| | - Gregory T Chesnut
- Department of Urology, Walter Reed National Military Medical Center, Bethesda, MD, USA.,Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - A Lindsay Frazier
- Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Boston, MA, USA
| | - Douglas W Strand
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Nicholas Coleman
- Department of Pathology, University of Cambridge, Cambridge, UK.,Department of Histopathology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Matthew J Murray
- Department of Pathology, University of Cambridge, Cambridge, UK.,Department of Pediatric Hematology and Oncology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - James F Amatruda
- Cancer and Blood Disease Institute, Children's Hospital Los Angeles, Los Angeles, CA, USA.,Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.,Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Aditya Bagrodia
- Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA
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3
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Schönberger S, Kraft D, Nettersheim D, Schorle H, Casati A, Craveiro RB, Mohseni MM, Calaminus G, Dilloo D. Targeting EpCAM by a Bispecific Trifunctional Antibody Exerts Profound Cytotoxic Efficacy in Germ Cell Tumor Cell Lines. Cancers (Basel) 2020; 12:cancers12051279. [PMID: 32438548 PMCID: PMC7281168 DOI: 10.3390/cancers12051279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/10/2020] [Accepted: 05/14/2020] [Indexed: 12/21/2022] Open
Abstract
Outcome in high-risk patients with refractory or relapsed germ cell tumours (GCT) remains poor. Novel strategies enhancing therapeutic efficacy whilst limiting therapeutic burden are warranted, yet immunotherapy approaches geared towards activating endogenous antitumor responses have not been successful thus far. Redirection of cytotoxic effector cells by bispecific antibodies represents a promising approach in this setting. We demonstrate that the Epithelial Cell Adhesion Molecule (EpCAM) is broadly expressed in GCT cell lines of different histologic origin including seminoma, choriocarcinoma (CHC), and embryonal carcinoma (EC). In these GCT lines of variable EpCAM surface expression, targeting T cells by the prototypic bispecific EpCAM/CD3-antibody (bAb) Catumaxomab together with natural killer (NK) cell engagement via the Fc domain promotes profound cytotoxicity across a broad range of antibody dilutions. In contrast, tumor cell lysis mediated by either immune cell subset alone is influenced by surface density of the target antigen. In the CHC line JAR, NK cell-dependent cytotoxicity dominates, which may be attributed to differential surface expression of immunomodulatory proteins such as MHC-I, CD24, and Fas receptors on CHC and EC. In view of redirecting T cell therapy mediated by bispecific antibodies, such differences in GCT immunophenotype potentially favoring immune escape are worth further investigation.
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Affiliation(s)
- Stefan Schönberger
- Department of Pediatric Hematology and Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany; (A.C.); (M.M.M.); (G.C.); (D.D.)
- Department of Pediatric Hematology and Oncology, University Hospital Essen, University of Essen, 45147 Essen, Germany
- Correspondence: ; Tel.: +49-201-723-85190
| | - Daniela Kraft
- Clinipace, Clinical Research Organisation, European Headquarters Eschborn, 65760 Eschborn, Germany;
| | - Daniel Nettersheim
- Department of Urology, Urological Research Lab, Translational UroOncology, University Hospital Düsseldorf, 40225 Düsseldorf, Germany;
| | - Hubert Schorle
- Institute of Pathology, Department of Developmental Pathology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany;
| | - Anna Casati
- Department of Pediatric Hematology and Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany; (A.C.); (M.M.M.); (G.C.); (D.D.)
| | - Rogerio B. Craveiro
- Department of Orthodontics, University Hospital of RWTH Aachen, University of Aachen, 52074 Aachen, Germany;
| | - Mahsa Mir Mohseni
- Department of Pediatric Hematology and Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany; (A.C.); (M.M.M.); (G.C.); (D.D.)
| | - Gabriele Calaminus
- Department of Pediatric Hematology and Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany; (A.C.); (M.M.M.); (G.C.); (D.D.)
| | - Dagmar Dilloo
- Department of Pediatric Hematology and Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany; (A.C.); (M.M.M.); (G.C.); (D.D.)
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Lafin JT, Bagrodia A, Woldu S, Amatruda JF. New insights into germ cell tumor genomics. Andrology 2019; 7:507-515. [PMID: 30896089 DOI: 10.1111/andr.12616] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 02/27/2019] [Accepted: 03/04/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Testicular germ cell tumors (GCTs) represent the most common malignancy in young men. While GCTs represent a model for curable solid tumors due to exquisite chemosensitivity, mortality for patients with GCT comprises the most life years lost for non-pediatric malignancies. Given limited options for patients with platinum-resistant disease, improved insight into GCT biology could identify novel therapeutic options for patients with platinum-resistant disease. Recent studies into molecular characteristics of both early stage and advanced germ cell tumors suggest a role for rationally targeted agents and potentially immunotherapy. RECENT DEVELOPMENTS Recent GWAS meta-analyses have uncovered additional susceptibility loci for GCT and provide further evidence that GCT risk is polygenic. Chromosome arm level amplifications and reciprocal loss of heterozygosity have been described as significantly enriched in GCT compared to other cancer types. Contemporary analyses confirm ubiquitous gain of isochromosome 12 and mutations in addition to previously described GCT-associated genes such as KIT and KRAS. Alterations within the TP53-MDM2 signal transduction pathway appear to be enriched among patients with platinum-resistant disease. Potentially actionable targets, including alterations in TP53-MDM2, Wnt/β-catenin, PI3K, and MAPK signaling, are present in significant proportions of patients with platinum-resistant disease and may be exploited as therapeutic options. Pre-clinical and early clinical data also suggest a potential role for immunotherapy among patients with GCTs. CONCLUSION Molecular characterization of GCT patients may provide biologic rationale for novel treatment options in patients with platinum-resistant disease.
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Affiliation(s)
- J T Lafin
- Department of Urology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
| | - A Bagrodia
- Department of Urology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
| | - S Woldu
- Department of Urology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
| | - J F Amatruda
- Department of Pediatrics, Division of Hematology/Oncology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
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5
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Williams LA, Mills L, Hooten AJ, Langer E, Roesler M, Frazier AL, Krailo M, Nelson HH, Bestrashniy J, Amatruda JF, Poynter JN. Differences in DNA methylation profiles by histologic subtype of paediatric germ cell tumours: a report from the Children's Oncology Group. Br J Cancer 2018; 119:864-872. [PMID: 30287918 PMCID: PMC6189207 DOI: 10.1038/s41416-018-0277-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 09/06/2018] [Accepted: 09/10/2018] [Indexed: 12/01/2022] Open
Abstract
Background Abnormal DNA methylation may be important in germ cell tumour (GCT) aetiology, as germ cells undergo complete epigenetic reprogramming during development. GCTs show differences in global and promoter methylation patterns by histologic subtype. We conducted an epigenome-wide study to identify methylation differences by GCT histology. Methods Using the Illumina HumanMethylation450K array we measured methylation in 154 paediatric GCTs (21 germinomas/seminomas/dysgerminoma, 70 yolk sac tumours [YST], 9 teratomas, and 54 mixed histology tumours). We identified differentially methylated regions (DMRs) between GCT histologies by comparing methylation beta values. Results We identified 8,481 DMRs (FWER < 0.05). Unsupervised hierarchical clustering of individual probes within DMRs resulted in four high level clusters closely corresponding to tumour histology. Clusters corresponding to age, location, sex and FFPE status were not observed within these DMRs. Germinomas displayed lower levels of methylation across the DMRs relative to the other histologic subtypes. Pathway analysis on the top 10% of genes with differential methylation in germinomas/seminomas/dysgerminoma compared to YST suggested angiogenesis and immune cell-related pathways displayed decreased methylation in germinomas/seminomas/dysgerminoma relative to YST. Conclusions Paediatric GCT histologies have differential methylation patterns. The genes that are differentially methylated may provide insights into GCT aetiology including the timing of GCT initiation.
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Affiliation(s)
- Lindsay A Williams
- Division of Epidemiology & Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Lauren Mills
- Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, MN, USA
| | - Anthony J Hooten
- Division of Epidemiology & Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Erica Langer
- Division of Epidemiology & Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Michelle Roesler
- Division of Epidemiology & Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - A Lindsay Frazier
- Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Boston, MA, USA
| | - Mark Krailo
- Department of Preventative Medicine, University of Southern California, Los Angeles, CA, USA
| | - Heather H Nelson
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, USA.,Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Jessica Bestrashniy
- Division of Epidemiology & Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - James F Amatruda
- Departments of Pediatrics, Molecular Biology and Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jenny N Poynter
- Division of Epidemiology & Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA. .,Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA.
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6
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Schönberger S, van Beekum C, Götz B, Nettersheim D, Schorle H, Schneider DT, Casati A, Craveiro RB, Calaminus G, Dilloo D. Brentuximab vedotin exerts profound antiproliferative and pro-apoptotic efficacy in CD30-positive as well as cocultured CD30-negative germ cell tumour cell lines. J Cell Mol Med 2017; 22:568-575. [PMID: 28941150 PMCID: PMC5742680 DOI: 10.1111/jcmm.13344] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 07/14/2017] [Indexed: 01/06/2023] Open
Abstract
Prognosis in patients suffering from high‐risk, refractory and relapsed germ cell tumours (GCT) often comprising of CD30‐positive embryonal carcinoma (EC) components remains poor. Thus, novel treatment strategies are warranted. The antibody‐drug conjugate (ADC) brentuximab vedotin delivers the potent antimitotic drug monomethyl auristatin E (MMAE) to CD30‐expressing tumour cells. After CD30 binding, internalization and intracellular linker cleavage cytotoxic MMAE can efflux and eradicate neighbouring CD30‐negative cells. To analyse cytotoxicity and a potential bystander effect of brentuximab vedotin in GCT, we established an in vitro coculture model mimicking GCT of heterogeneous CD30 positivity and measured cell viability, proliferation and apoptosis after exposure to brentuximab vedotin and unbound MMAE by MTS‐ and flow cytometry‐based CFSE/Hoechst assay. CD30 expression being assessed by quantitative RT‐PCR and immunohistochemistry was apparent in all EC cell lines with different intensity. Brentuximab vedotin abrogates cell viability of CD30‐positive GCT27 EC line exerting marked time‐dependent antiproliferative and pro‐apoptotic activity. CD30‐negative JAR cultured alone barely responds to brentuximab vedotin, while in coculture with GCT27 brentuximab vedotin induces clear dose‐dependent cytotoxicity. Cellular proliferation and cell death are significantly enhanced in CD30‐negative JAR cocultured with CD30‐positive GCT27 compared to JAR cultured alone in proof of substantial bystander activity of brentuximab vedotin in CD30‐negative GCT. We present first evidence that in an in vitro model mimicking GCT of heterogeneous histology, brentuximab vedotin exerts potent antiproliferative and pro‐apoptotic activity against both CD30‐positive as well as CD30‐negative GCT subsets. Our results strongly support translational efforts to evaluate clinical efficacy of brentuximab vedotin in high‐risk GCT of heterogeneous CD30 positivity.
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Affiliation(s)
- Stefan Schönberger
- Department of Paediatric Haematology and Oncology, University Children's Hospital Bonn, University of Bonn Medical School, Bonn, Germany
| | - Cornelius van Beekum
- Department of Paediatric Haematology and Oncology, University Children's Hospital Bonn, University of Bonn Medical School, Bonn, Germany
| | - Barbara Götz
- Department of Paediatric Haematology and Oncology, University Children's Hospital Bonn, University of Bonn Medical School, Bonn, Germany
| | - Daniel Nettersheim
- Department of Developmental Pathology, Institute of Pathology, University of Bonn Medical School, Bonn, Germany
| | - Hubert Schorle
- Department of Developmental Pathology, Institute of Pathology, University of Bonn Medical School, Bonn, Germany
| | | | - Anna Casati
- Department of Paediatric Haematology and Oncology, University Children's Hospital Bonn, University of Bonn Medical School, Bonn, Germany
| | - Rogerio B Craveiro
- Department of Paediatric Haematology and Oncology, University Children's Hospital Bonn, University of Bonn Medical School, Bonn, Germany
| | - Gabriele Calaminus
- Department of Paediatric Haematology and Oncology, University Children's Hospital Bonn, University of Bonn Medical School, Bonn, Germany
| | - Dagmar Dilloo
- Department of Paediatric Haematology and Oncology, University Children's Hospital Bonn, University of Bonn Medical School, Bonn, Germany
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Wang H, Ke H, Zheng Y, Lai J, Luo Q, Chen Q. A modified bisulfite conversion method for the detection of DNA methylation. Epigenomics 2017; 9:955-969. [PMID: 28548583 DOI: 10.2217/epi-2016-0174] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
AIM Our purpose is to improve the conventional procedures for bisulfite conversion used to detect 5-methylcytosine in DNA. METHODS Impacts of different bisulfite salts, bisulfite conversion temperature, antioxidants and denaturants on DNA conversion and degradation were assessed by methylation-sensitive melt curve analysis. The modified method was tested on different genes and the conversion efficiency was analyzed by bisulfite sequencing. RESULTS We developed a modified bisulfite conversion method that completes this process within 2 h. We demonstrate that high temperature denaturation is the major cause for DNA degradation, and the addition of ethylene glycol dimethyl ether is an effective way to accelerate the bisulfite conversion. The conversion efficiency is comparable to many other commercial kits. CONCLUSION Our modified bisulfite conversion method is simple, cost efficient and less time consuming and is compatible with different genes and samples, thus has a great potential for the future research and clinical applications.
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Affiliation(s)
- Hanze Wang
- Fujian Key Laboratory of Innate Immune Biology, Biomedical Research Center of South China, College of Life Science, Fujian Normal University Qishan Campus, 1 Keji Road, College Town, Fuzhou, Fujian 350117, China
| | - Huican Ke
- Fujian Key Laboratory of Innate Immune Biology, Biomedical Research Center of South China, College of Life Science, Fujian Normal University Qishan Campus, 1 Keji Road, College Town, Fuzhou, Fujian 350117, China
| | - Yansong Zheng
- Department of Hepatobiliary Pancreatic Surgery, The First Affiliated Hospital of Fujian Medical University, Fujian, China
| | - Junzhong Lai
- Fujian Key Laboratory of Innate Immune Biology, Biomedical Research Center of South China, College of Life Science, Fujian Normal University Qishan Campus, 1 Keji Road, College Town, Fuzhou, Fujian 350117, China
| | - Qianping Luo
- Fujian Key Laboratory of Innate Immune Biology, Biomedical Research Center of South China, College of Life Science, Fujian Normal University Qishan Campus, 1 Keji Road, College Town, Fuzhou, Fujian 350117, China
| | - Qi Chen
- Fujian Key Laboratory of Innate Immune Biology, Biomedical Research Center of South China, College of Life Science, Fujian Normal University Qishan Campus, 1 Keji Road, College Town, Fuzhou, Fujian 350117, China
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8
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Wnt signaling in testis development: Unnecessary or essential? Gene 2015; 565:155-65. [DOI: 10.1016/j.gene.2015.04.066] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 03/29/2015] [Accepted: 04/24/2015] [Indexed: 11/24/2022]
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9
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Kraggerud SM, Hoei-Hansen CE, Alagaratnam S, Skotheim RI, Abeler VM, Rajpert-De Meyts E, Lothe RA. Molecular characteristics of malignant ovarian germ cell tumors and comparison with testicular counterparts: implications for pathogenesis. Endocr Rev 2013; 34:339-76. [PMID: 23575763 PMCID: PMC3787935 DOI: 10.1210/er.2012-1045] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review focuses on the molecular characteristics and development of rare malignant ovarian germ cell tumors (mOGCTs). We provide an overview of the genomic aberrations assessed by ploidy, cytogenetic banding, and comparative genomic hybridization. We summarize and discuss the transcriptome profiles of mRNA and microRNA (miRNA), and biomarkers (DNA methylation, gene mutation, individual protein expression) for each mOGCT histological subtype. Parallels between the origin of mOGCT and their male counterpart testicular GCT (TGCT) are discussed from the perspective of germ cell development, endocrinological influences, and pathogenesis, as is the GCT origin in patients with disorders of sex development. Integrated molecular profiles of the 3 main histological subtypes, dysgerminoma (DG), yolk sac tumor (YST), and immature teratoma (IT), are presented. DGs show genomic aberrations comparable to TGCT. In contrast, the genome profiles of YST and IT are different both from each other and from DG/TGCT. Differences between DG and YST are underlined by their miRNA/mRNA expression patterns, suggesting preferential involvement of the WNT/β-catenin and TGF-β/bone morphogenetic protein signaling pathways among YSTs. Characteristic protein expression patterns are observed in DG, YST and IT. We propose that mOGCT develop through different developmental pathways, including one that is likely shared with TGCT and involves insufficient sexual differentiation of the germ cell niche. The molecular features of the mOGCTs underline their similarity to pluripotent precursor cells (primordial germ cells, PGCs) and other stem cells. This similarity combined with the process of ovary development, explain why mOGCTs present so early in life, and with greater histological complexity, than most somatic solid tumors.
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Affiliation(s)
- Sigrid Marie Kraggerud
- Department of Cancer Prevention, Institute for Cancer Research, Oslo University Hospital, N-0310 Oslo, Norway
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10
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Schönberger S, Okpanyi V, Calaminus G, Heikaus S, Leuschner I, Nicholson JC, Stoecklein NH, Schneider DT, Borkhardt A. EPCAM-A novel molecular target for the treatment of pediatric and adult germ cell tumors. Genes Chromosomes Cancer 2012; 52:24-32. [PMID: 22987628 DOI: 10.1002/gcc.22002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 07/31/2012] [Indexed: 01/06/2023] Open
Abstract
Germ cell tumors (GCTs) are thought to develop from totipotent primordial germ cells. Although the epithelial cell adhesion molecule (EPCAM) is expressed on embryonic stem cells as well as different tumor cells, it has not yet been extensively studied in GCTs. We analyzed EPCAM expression by quantitative RT-PCR in 48 fresh-frozen GCT specimens of different histology (10 mature teratoma, MT; 6 immature teratoma, IT; 7 dysgerminoma; 6 mixed malignant GCTs; 19 yolk sac tumor, YST) and in the GCT cell lines NCCIT, TE76.T, JAR and 2102Ep, and correlated its expression with AFP and hCG protein levels, histologic differentiation, and clinical follow-up data. EPCAM protein was visualized by immunohistochemistry of selected corresponding paraffin embedded tumor tissues. EPCAM was expressed in malignant but not in benign GCTs irrespective of age, sex, site and clinical stage of tumor (P = 0.001). In primary teratomas, EPCAM expression increased with their grade of immaturity (mean 2(-ΔCt) values: MT 0.23, IT 1.61, P = 0.007) and significantly correlated with serum AFP (P = 0.03) and hCG (P = 0.03) levels in malignant GCTs. Particularly high EPCAM levels were found in nonseminomatous GCTs such as YSTs (8.49) and choriocarcinoma (13.54). Immunohistochemical analysis verified gene expression data showing a distinct EPCAM staining in YST. Similarly in vitro, highest EPCAM expression was measured in GCT cell lines comprising yolk sac (2102Ep: 5.59) or choriocarcinoma (JAR: 10.65) components. This first comprehensive analysis of EPCAM in GCTs revealed high EPCAM expression in YSTs and choriocarcinomas. Thus, these nonseminomatous GCTs may be interesting targets for EPCAM immunotherapy, which has to be evaluated in further studies.
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Affiliation(s)
- Stefan Schönberger
- Department of Pediatric Hematology and Oncology, University of Bonn, University Children's Hospital Bonn, Germany.
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Kattentidt Mouravieva AA, Geurts-Giele IRR, de Krijger RR, van Noesel MM, van de Ven CP, van den Ouweland AMW, Kromosoeto JNR, Dinjens WNM, Dubbink HJ, Smits R, Wagner A. Identification of Familial Adenomatous Polyposis carriers among children with desmoid tumours. Eur J Cancer 2012; 48:1867-74. [PMID: 22305464 DOI: 10.1016/j.ejca.2012.01.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Revised: 12/24/2011] [Accepted: 01/04/2012] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Desmoid tumours are rare mesenchymal tumours with unpredictable progression and high recurrence risk. They can occur sporadically or in association with Familial Adenomatous Polyposis (FAP), which is caused by germline APC mutations. The Wnt/β-catenin pathway has a central role in the pathogenesis of desmoid tumours. These tumours can occur due to either a somatic CTNNB1 or APC mutation but can also be the first manifestation of FAP. Because germline APC analysis is not routinely performed in children with desmoid tumours, the diagnosis FAP may escape detection. The aim of this study is to form guidelines for the identification of possible APC germline mutation carriers among children with desmoid tumours, based on CTNNB1 mutation analysis and immunohistochemical analysis (IHC) for β-catenin. PATIENTS AND METHODS We performed IHC of β-catenin and mutation analysis of CTNNB1 and APC in 18 paediatric desmoid tumours, diagnosed between 1990 and 2009 in the Erasmus MC, Rotterdam. RESULTS In 11 tumours, IHC showed an abnormal nuclear β-catenin accumulation. In this group a CTNNB1 mutation was detected in seven tumours. In two tumours with an abnormal nuclear β-catenin accumulation and no CTNNB1 mutation, an APC mutation was identified, which appeared to be a germline mutation. CONCLUSIONS Aberrant staining of β-catenin in paediatric desmoids helps to identify children at risk for FAP. We recommend to screen paediatric desmoid tumours for nuclear localisation of β-catenin and consequently for CTNNB1 mutations. For patients with nuclear β-catenin expression and no CTNNB1 mutations, APC mutation analysis should be offered after genetic counselling.
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Mutation in the type IB bone morphogenetic protein receptor Alk6b impairs germ-cell differentiation and causes germ-cell tumors in zebrafish. Proc Natl Acad Sci U S A 2011; 108:13153-8. [PMID: 21775673 DOI: 10.1073/pnas.1102311108] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Germ-cell tumors (GCTs), which arise from pluripotent embryonic germ cells, exhibit a wide range of histologic differentiation states with varying clinical behaviors. Although testicular GCT is the most common cancer of young men, the genes controlling the development and differentiation of GCTs remain largely unknown. Through a forward genetic screen, we previously identified a zebrafish mutant line, tgct, which develops spontaneous GCTs consisting of undifferentiated germ cells [Neumann JC, et al. (2009) Zebrafish 6:319-327]. Using positional cloning we have identified an inactivating mutation in alk6b, a type IB bone morphogenetic protein (BMP) receptor, as the cause of the zebrafish GCT phenotype. Alk6b is expressed in spermatogonia and early oocytes, and alk6b mutant gonads display impaired BMP signal transduction, altered expression of BMP target genes, and abnormal germ-cell differentiation. We find a similar absence of BMP signaling in undifferentiated human GCTs, such as seminomas and embryonal carcinoma, but not in normal testis or in differentiated GCTs. These results indicate a germ-cell-autonomous role for BMP signal transduction in germ-cell differentiation, and highlight the importance of the BMP pathway in human GCTs.
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Fustino N, Rakheja D, Ateek CS, Neumann JC, Amatruda JF. Bone morphogenetic protein signalling activity distinguishes histological subsets of paediatric germ cell tumours. ACTA ACUST UNITED AC 2011; 34:e218-33. [PMID: 21696393 DOI: 10.1111/j.1365-2605.2011.01186.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Germ cell tumours (GCTs) are cancers of the testis, ovary or extragonadal sites that occur in infants, children and adults. Testicular GCT is the most common cancer in young men aged 15-40 years. Abnormalities in developmental signalling pathways such as wnt/β-catenin, TGF-β/BMP and Hedgehog have been described in many childhood tumours. To date, however, the status of BMP signalling in GCTs has not been described. Herein, we examine BMP-SMAD signalling in a set of clinically-annotated paediatric GCTs. We find that BMP signalling activity is absent in undifferentiated tumours such as seminomas and dysgerminomas, but robustly present in most yolk sac tumours, a differentiated tumour type. Gene expression profiling of TGF-β/BMP pathway genes in germinomas and yolk sac tumours reveals a set of genes that distinguish the two tumour types. There is significant intertumoural heterogeneity between tumours of the same histological subclass, implying that the BMP pathway can be differentially regulated in individual tumours. Finally, through miRNA expression profiling, we identify differential regulation of a set of miRNAs predicted to target the TGF-β/BMP pathway at multiple sites. Taken together, these results suggest that the BMP signalling pathway may represent a new therapeutical target for childhood GCTs.
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Affiliation(s)
- N Fustino
- Division of Hematology-Oncology, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas 75390-8534, USA
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