1
|
Karius T, Deborre C, Wirtz DC, Burger C, Prescher A, Fölsch A, Kabir K, Pflugmacher R, Goost H. Radiofrequency-activated PMMA-augmentation through cannulated pedicle screws: A cadaver study to determine the biomechanical benefits in the osteoporotic spine. Technol Health Care 2017; 25:327-342. [PMID: 27886018 DOI: 10.3233/thc-161273] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION PMMA-augmentation of pedicle screws strengthens the bone-screw-interface reducing cut-out risk. Injection of fluid cement bears a higher risk of extravasation, with difficulty of application because of inconsistent viscosity and limited injection time. OBJECTIVE To test a new method of cement augmentation of pedicle screws using radiofrequency-activated PMMA, which is suspected to be easier to apply and have less extravasations. METHODS Twenty-seven fresh-frozen human cadaver lumbar spines were divided into 18 osteoporotic (BMD ≤ 0.8 g/cm2) and 9 non-osteoporotic (BMD > 0.8 g/cm2) vertebral bodies. Bipedicular cannulated pedicle screws were implanted into the vertebral bodies; right screws were augmented with ultra-high viscosity PMMA, whereas un-cemented left pedicle screws served as negative controls. Cement distribution was controlled with fluoroscopy and CT scans. Axial pullout forces of the screws were measured with a material testing machine, and results were analyzed statistically. RESULTS Fluoroscopy and CT scans showed that in all cases an adequately big cement depot with homogenous form and no signs of extravasation was injected. Pullout forces showed significant differences (p < 0.001) between the augmented and non-augmented pedicle screws for bone densities below 0.8 g/cm2 (661.9 N ± 439) and over 0.8 g/cm2 (744.9 N ± 415). CONCLUSIONS Pullout-forces were significantly increased in osteoporotic as well as in non-osteoporotic vertebral bodies without a significant difference between these groups using this standardized, simple procedure with increased control and less complications like extravasation.
Collapse
Affiliation(s)
- T Karius
- Department of Orthopaedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany.,Department of Orthopaedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
| | - C Deborre
- Department of Orthopaedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany.,Department of Orthopaedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
| | - D C Wirtz
- Department of Orthopaedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
| | - C Burger
- Department of Orthopaedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
| | - A Prescher
- Institute of Anatomy, University Hospital RWTH Aachen, Aachen, Germany
| | - A Fölsch
- Department of Orthopaedics, University Hospital Marburg, Marburg, Germany
| | - K Kabir
- Department of Orthopaedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
| | - R Pflugmacher
- Department of Orthopaedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
| | - H Goost
- Department of Orthopaedics and Trauma Surgery, Hospital Wermelskirchen, Wermelskirchen, Germany
| |
Collapse
|
2
|
Oliveira Ferrer L, Rosprim R, Karius T, Witzel I, Müller V, Schmalfeldt B, Milde-Langosch K. Die Rolle der Mannosidase MAN1A1 für die Progression und Metastasierung von Mammakarzinomen. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1593260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
3
|
Oliveira-Ferrer L, Karius T, Witzel I, Karn T, Wirtz R, Müller V, Milde-Langosch K. Relevance of glycosylation-associated genes for tumor progression and metastasis localization in breast cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv117.33] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
4
|
Schnekenburger M, Karius T, Diederich M. Regulation of epigenetic traits of the glutathione S-transferase P1 gene: from detoxification toward cancer prevention and diagnosis. Front Pharmacol 2014; 5:170. [PMID: 25076909 PMCID: PMC4100573 DOI: 10.3389/fphar.2014.00170] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [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: 05/01/2014] [Accepted: 06/30/2014] [Indexed: 01/08/2023] Open
Abstract
Glutathione S-transferases (GSTs) are phase II drug detoxifying enzymes that play an essential role in the maintenance of cell integrity and protection against DNA damage by catalyzing the conjugation of glutathione to a wide variety of exo- and endogenous electrophilic substrates. Glutathione S-transferase P1 (GSTP1), the gene encoding the pi-class GST, is frequently inactivated by acquired somatic CpG island promoter hypermethylation in multiple cancer subtypes including prostate, breast, liver, and blood cancers. Epigenetically mediated GSTP1 silencing is associated with enhanced cancer susceptibility by decreasing its “caretaker” gene function, which tends to promote neoplastic transformation allowing cells to acquire additional alterations. Thus, this epigenetic alteration is now considered as a cancer biomarker but could as well play a driving role in multistep cancer development, especially well documented in prostate cancer development. The present review discusses applications of epigenetic alterations affecting GSTP1 in cancer medicine used alone or in combination with other biomarkers for cancer detection and diagnosis as well as for future targeted preventive and therapeutic interventions including by dietary agents.
Collapse
Affiliation(s)
- Michael Schnekenburger
- Laboratoire de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg Luxembourg
| | - Tommy Karius
- Laboratoire de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg Luxembourg
| | - Marc Diederich
- College of Pharmacy, Seoul National University, Seoul South Korea
| |
Collapse
|
5
|
Grandjenette C, Schnekenburger M, Karius T, Ghelfi J, Gaigneaux A, Henry E, Dicato M, Diederich M. 5-aza-2'-deoxycytidine-mediated c-myc Down-regulation triggers telomere-dependent senescence by regulating human telomerase reverse transcriptase in chronic myeloid leukemia. Neoplasia 2014; 16:511-28. [PMID: 24970385 PMCID: PMC4198755 DOI: 10.1016/j.neo.2014.05.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/17/2014] [Accepted: 05/21/2014] [Indexed: 12/11/2022] Open
Abstract
Increased proliferation rates as well as resistance to apoptosis are considered major obstacles for the treatment of patients with chronic myelogenous leukemia (CML), thus highlighting the need for novel therapeutic approaches. Since senescence has been recognized as a physiological barrier against tumorigenesis, senescence-based therapy could represent a new strategy against CML. DNA demethylating agent 5-aza-2′-deoxycytidine (DAC) was reported to induce cellular senescence but underlying mechanisms remain to be elucidated. Here, we report that exposure to DAC triggers senescence in chronic leukemia cell lines as evidenced by increased senescence-associated β-galactosidase activity and lysosomal mass, accompanied by an up-regulation of cell cycle-related genes. We provide evidence that DAC is able to decrease telomere length, to reduce telomerase activity and to decrease human telomerase reverse transcriptase (hTERT) expression through decreased binding of c-myc to the hTERT promoter. Altogether, our results reveal the role of c-myc in telomere-dependent DAC-induced senescence and therefore provide new clues for improving chronic human leukemia treatments.
Collapse
Affiliation(s)
- Cindy Grandjenette
- Laboratoire de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg, 9, rue Edward Steichen, L-2540 Luxembourg, Luxembourg
| | - Michael Schnekenburger
- Laboratoire de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg, 9, rue Edward Steichen, L-2540 Luxembourg, Luxembourg
| | - Tommy Karius
- Laboratoire de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg, 9, rue Edward Steichen, L-2540 Luxembourg, Luxembourg
| | - Jenny Ghelfi
- Laboratoire de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg, 9, rue Edward Steichen, L-2540 Luxembourg, Luxembourg
| | - Anthoula Gaigneaux
- Laboratoire de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg, 9, rue Edward Steichen, L-2540 Luxembourg, Luxembourg
| | - Estelle Henry
- Laboratoire de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg, 9, rue Edward Steichen, L-2540 Luxembourg, Luxembourg
| | - Mario Dicato
- Laboratoire de Biologie Moléculaire et Cellulaire du Cancer, Hôpital Kirchberg, 9, rue Edward Steichen, L-2540 Luxembourg, Luxembourg
| | - Marc Diederich
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea.
| |
Collapse
|
6
|
Pflugmacher R, Bornemann R, Karius T, Otten L, Wirtz D. SAT0374 Radiofrequency kyphoplasty versus conservative care: Results of treating vertebral body fractures. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.3320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
7
|
Goost H, Kabir K, Wirtz DC, Deborre C, Karius T, Pflugmacher R, Koch EMW, Burger C, Fölsch C. [PMMA augmentation of pedicle screws: results of a survey in Germany]. Z Orthop Unfall 2012; 150:318-23. [PMID: 22723073 DOI: 10.1055/s-0031-1298371] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
BACKGROUND The anchorage of pedicle screws can be challenging in the osteoporotic spine. A promising technique are cement augumented pedicle screws. The goal of this study was to gain more information regarding application of pedicle screw augmentation in Germany. MATERIALS AND METHODS Participants of the National German Spine Congress 2009 were invited to participate in an internet-based anonymous survey regarding application of pedicle screw augmentation. The questionnaire was related to different aspects of materials and procedures for pedicle screw augmentation. The frequency of answers was divided according to the specialty state of the surgeons: orthopaedic and trauma surgeons vs. neurosurgeons. The Mantel-Haenszel test was applied to evaluate the differences between the groups. RESULTS AND CONCLUSION 69 (64 %) orthopaedic and trauma surgeons and 39 (36 %) neurosurgeons participated (n = 108). Nearly 80 % of the participants use cement-augmented pedicle screws in their daily practice. Almost 2/3 of the specialists apply cannulated screws or other special screws. The Expedium (Company) screws are particularly preferred. The insertion of screws is combined with kyphoplasty or vertebroplasty in 20 % of the cases. The balloon kyphoplasty was applied most commonly. There was no statistical difference between the surgeon groups regarding the different techniques. The main indications for pedicle screw augmentation were osteoporosis, intraoperative findings as well as loosening of screws, and revision. The most frequently observed complication is cement extravasation into the spinal canal (28 %). The cost issue is considered as being important but unknown to most of the participants. It can be assumed that the use of pedicle screws in Germany is well established in spine surgery, without as yet a standard technique being established.
Collapse
Affiliation(s)
- H Goost
- Klinik und Poliklinik für Orthopädie und Unfallchirurgie, Universitätsklinikum Bonn.
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Arand J, Spieler D, Karius T, Branco MR, Meilinger D, Meissner A, Jenuwein T, Xu G, Leonhardt H, Wolf V, Walter J. In vivo control of CpG and non-CpG DNA methylation by DNA methyltransferases. PLoS Genet 2012; 8:e1002750. [PMID: 22761581 PMCID: PMC3386304 DOI: 10.1371/journal.pgen.1002750] [Citation(s) in RCA: 288] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 04/20/2012] [Indexed: 12/14/2022] Open
Abstract
The enzymatic control of the setting and maintenance of symmetric and non-symmetric DNA methylation patterns in a particular genome context is not well understood. Here, we describe a comprehensive analysis of DNA methylation patterns generated by high resolution sequencing of hairpin-bisulfite amplicons of selected single copy genes and repetitive elements (LINE1, B1, IAP-LTR-retrotransposons, and major satellites). The analysis unambiguously identifies a substantial amount of regional incomplete methylation maintenance, i.e. hemimethylated CpG positions, with variant degrees among cell types. Moreover, non-CpG cytosine methylation is confined to ESCs and exclusively catalysed by Dnmt3a and Dnmt3b. This sequence position-, cell type-, and region-dependent non-CpG methylation is strongly linked to neighboring CpG methylation and requires the presence of Dnmt3L. The generation of a comprehensive data set of 146,000 CpG dyads was used to apply and develop parameter estimated hidden Markov models (HMM) to calculate the relative contribution of DNA methyltransferases (Dnmts) for de novo and maintenance DNA methylation. The comparative modelling included wild-type ESCs and mutant ESCs deficient for Dnmt1, Dnmt3a, Dnmt3b, or Dnmt3a/3b, respectively. The HMM analysis identifies a considerable de novo methylation activity for Dnmt1 at certain repetitive elements and single copy sequences. Dnmt3a and Dnmt3b contribute de novo function. However, both enzymes are also essential to maintain symmetrical CpG methylation at distinct repetitive and single copy sequences in ESCs.
Collapse
Affiliation(s)
- Julia Arand
- Department of Biological Sciences, Institute of Genetics/Epigenetics, University of Saarland, Saarbrücken, Germany
| | - David Spieler
- Department of Computer Science, University of Saarland, Saarbrücken, Germany
| | - Tommy Karius
- Department of Biological Sciences, Institute of Genetics/Epigenetics, University of Saarland, Saarbrücken, Germany
| | - Miguel R. Branco
- Epigenetics Programme, Babraham Institute, Cambridge, United Kingdom
- Centre for Trophoblast Research, University of Cambridge, Cambridge, United Kingdom
| | - Daniela Meilinger
- Department of Biology II, LMU München, Biozentrum Martinsried, Martinsried, Germany
| | - Alexander Meissner
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, Massachusetts, United States of America
| | | | - Guoliang Xu
- Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Heinrich Leonhardt
- Department of Biology II, LMU München, Biozentrum Martinsried, Martinsried, Germany
| | - Verena Wolf
- Department of Computer Science, University of Saarland, Saarbrücken, Germany
| | - Jörn Walter
- Department of Biological Sciences, Institute of Genetics/Epigenetics, University of Saarland, Saarbrücken, Germany
| |
Collapse
|
9
|
Karius T, Schnekenburger M, Dicato M, Diederich M. MicroRNAs in cancer management and their modulation by dietary agents. Biochem Pharmacol 2012; 83:1591-601. [PMID: 22342289 DOI: 10.1016/j.bcp.2012.02.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2011] [Revised: 01/11/2012] [Accepted: 02/01/2012] [Indexed: 12/16/2022]
Abstract
MicroRNAs (miRNAs) represent a class of small (21-23 nucleotides) non-coding RNAs that emerged as key post-transcriptional gene regulators, implicated in numerous physiological and pathological processes. Currently, a main focus of miRNA research is related to the roles of miRNAs in cancer development. The biogenesis and modes of action of miRNAs have not been completely elucidated; however, miRNA-mediated translational repression is involved in the regulation of almost every cellular process. Thus, pathological alterations in miRNA expression signatures are commonly associated with disease development. This review specifically focuses on miRNAs in cancer, with an emphasis on their use as potential biomarkers for cancer diagnosis and prognosis. Then, we discuss the potential use of synthetic antisense or miRNA mimetic oligonucleotides and dietary agents to modulate miRNA expression for chemotherapy and chemoprevention of cancer, respectively.
Collapse
Affiliation(s)
- Tommy Karius
- Laboratoire de Biologie Moléculaire et Cellulaire de Cancer, Hôpital Kirchberg, 9, rue Edward Steichen, L-2540 Luxembourg, Luxembourg
| | | | | | | |
Collapse
|
10
|
Karius T, Schnekenburger M, Ghelfi J, Walter J, Dicato M, Diederich M. Reversible epigenetic fingerprint-mediated glutathione-S-transferase P1 gene silencing in human leukemia cell lines. Biochem Pharmacol 2011; 81:1329-42. [PMID: 21453686 DOI: 10.1016/j.bcp.2011.03.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 03/17/2011] [Accepted: 03/21/2011] [Indexed: 12/31/2022]
Abstract
Glutathione-S-transferase P1 (GSTP1) gene is commonly silenced by CpG island promoter hypermethylation in prostate, breast, and liver cancers. However, mechanisms leading to GSTP1 repression by promoter hypermethylation in leukemia and its relationship with pathological alterations of the chromatin structure remain poorly understood. A panel of leukemia cell lines was analyzed for their GSTP1 expression, revealing cell lines with high, moderate or no detectable GSTP1 expression. Bisulfite sequencing, methylation-specific PCR and combined bisulfite restriction analysis revealed that GSTP1 promoter was completely methylated in transcriptionally inactive RAJI and MEG-01 cell lines. In contrast, cell lines expressing GSTP1 exhibited an unmethylated and transcriptionally active promoter. Furthermore, histone marks and effector proteins associated with transcriptional activity were detected by chromatin immunoprecipitation in the GSTP1 expressing hypomethylated K-562 cell line. However, repressive chromatin marks and the recruitment of silencing protein complexes were found in the non-expressing hypermethylated RAJI and MEG-01 cell lines. Finally, we provide evidence that treatment of RAJI and MEG-01 cells with the DNA demethylating agent, 5-aza-2'-deoxycytidine, resulted in GSTP1 promoter demethylation, drastic changes of histone modifications and promoter associated proteins and GSTP1 gene activation. In contrast, treatments with HDAC inhibitors failed to demethylate and reactivate the GSTP1 gene. Our study extends the knowledge on leukemia-specific epigenetic alterations of GSTP1 gene. Furthermore, we are showing the correlation of DNA methylation and histone modifications with the positive/negative GSTP1 transcriptional expression state. Finally, these data support the concept of the dominance of DNA methylation over HDAC inhibitor-sensitive histone deacetylation in gene silencing.
Collapse
Affiliation(s)
- Tommy Karius
- Laboratoire de Biologie Moléculaire et Cellulaire de Cancer, Hôpital Kirchberg, Luxembourg
| | | | | | | | | | | |
Collapse
|
11
|
Schnekenburger M, Grandjenette C, Ghelfi J, Karius T, Foliguet B, Dicato M, Diederich M. Sustained exposure to the DNA demethylating agent, 2′-deoxy-5-azacytidine, leads to apoptotic cell death in chronic myeloid leukemia by promoting differentiation, senescence, and autophagy. Biochem Pharmacol 2011; 81:364-78. [DOI: 10.1016/j.bcp.2010.10.013] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Revised: 10/22/2010] [Accepted: 10/25/2010] [Indexed: 11/16/2022]
|
12
|
Schnekenburger M, Karius T, Cerella C, Diederich M. Targeting inflammatory cell signaling mechanisms: a promising road to new therapeutic agents in chemoprevention and cancer therapy. J Exp Ther Oncol 2011; 9:1-4. [PMID: 21275260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
|