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Zhou D, Xu P, Zhou X, Diao Z, Ouyang J, Yan G, Chen B. MiR-181a enhances drug sensitivity of mixed lineage leukemia-rearranged acute myeloid leukemia by increasing poly(ADP-ribose) polymerase1 acetylation. Leuk Lymphoma 2020; 62:136-146. [PMID: 32996365 DOI: 10.1080/10428194.2020.1824067] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Chromosomal translocations and rearrangements involving Mixed Lineage Leukemia (MLL) gene is associated with poor prognosis in AML. Extensive epigenetic changes were found in this group of patients. In clinical study, we found miR-181a expression level was significantly lower in MLL-rearranged AML. As an important epi-miRNA, the role of miR-181a as an epigenetic regulator in leukemia has not been investigated before. In this study, we found miR-181a overexpression enhanced total protein acetylation in THP-1 cells, which harbor MLL-AF9 fusion gene, and protein Mass Spectrum identified poly(ADP-ribose) polymerase 1 (PARP1) was a major downstream target. Increased PARP1 acetylation was mediated by down-regulation of histone deacetylase Sirtuin1 (Sirt1). MiR-181a overexpression resulted in DNA trapping of PARP1, increased DNA double strand break formation and increased chemosensitivity of leukemia cells both in vitro and in vivo. This study indicates miR-181a-Sirt1-PARP1 acetylation pathway could be a promising target for this special group of AML.
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Affiliation(s)
- Di Zhou
- Department of Hematology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, People's Republic of China
| | - Peipei Xu
- Department of Hematology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, People's Republic of China
| | - Xuan Zhou
- Department of Hematology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, People's Republic of China
| | - Zhenyu Diao
- Department of Reproductive Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, People's Republic of China
| | - Jian Ouyang
- Department of Hematology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, People's Republic of China
| | - Guijun Yan
- Department of Reproductive Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, People's Republic of China
| | - Bing Chen
- Department of Hematology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, People's Republic of China
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2
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Pantazis TL, Giotakis AI, Karamagkiolas S, Giotakis I, Konstantoulakis M, Liakea A, Misiakos EP. Low expression of miR-20b-5p indicates favorable prognosis in laryngeal squamous cell carcinoma, especially in patients with non-infiltrated regional lymph nodes. Am J Otolaryngol 2020; 41:102563. [PMID: 32521298 DOI: 10.1016/j.amjoto.2020.102563] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 05/24/2020] [Indexed: 12/20/2022]
Abstract
PURPOSE Tumor recurrence and distant metastasis are very common in laryngeal squamous cell carcinoma (LSCC). In this study, we examined the potential prognostic value of microRNA-20b-5p (miR-20b-5p), a component of the tumor-related miR-106a/363 cluster. MATERIALS AND METHODS Total RNA was purified from 105 tissue specimens resected from patients having undergone surgical treatment for primary LSCC. After in vitro polyadenylation and reverse transcription, a sensitive real-time quantitative polymerase chain reaction (qPCR) methodology was applied for the relative quantification of miR-20b-5p levels. Then, we proceeded with biostatistical analysis, seeking to assess the prognostic value of miR-20b-5p expression in LSCC. RESULTS miR-20b-5p positivity constitutes a predictor of inferior DFS and OS in LSCC (P < 0.001 and P = 0.002, respectively). The significant prognostic value of miR-20b-5p expression status seems to be independent of tumor size, histological grade, and TNM stage, as revealed by the multivariate bootstrap Cox regression analysis. Kaplan-Meier survival analysis showed also that miR-20b-5p expression status can stratify LSCC patients with non-infiltrated regional lymph nodes (N0) into two subgroups with distinct prognosis (P = 0.004 and P = 0.004, respectively). CONCLUSIONS The miR-20b-5p expression status is a promising molecular tissue biomarker in LSCC, with an independent prognostic value, and thus merits further validation in larger cohorts of patients.
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Affiliation(s)
- Theodwros-Leonidas Pantazis
- First Department of Otolaryngology, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece.
| | - Aris I Giotakis
- First Department of Otolaryngology, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Sotirios Karamagkiolas
- First Department of Otolaryngology, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Ioannis Giotakis
- First Department of Otolaryngology, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Manousos Konstantoulakis
- First Department of Propaedeutic Surgery, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Aliki Liakea
- First Department of Pathology, National and Kapodistrian University of Athens, Faculty of Medicine, Athens, Greece
| | - Evangelos P Misiakos
- Third Department of Surgery, University General Hospital "Attikon", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
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3
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Karamagkiolas S, Giotakis I, Kyrodimos E, Giotakis EI, Kataki A, Karagianni F, Lazaris AM. Expression of vimentin (VIM) and metastasis-associated 1 (MTA1) protein in laryngeal squamous cell carcinoma are associated with prognostic outcome of patients. Am J Otolaryngol 2019; 40:487-493. [PMID: 30979652 DOI: 10.1016/j.amjoto.2019.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 03/30/2019] [Accepted: 04/02/2019] [Indexed: 12/20/2022]
Abstract
PURPOSE Laryngeal squamous cell carcinoma (LSCC), a common type of head and neck cancer, is associated with high rates of metastasis and recurrence. In this study, we investigated the potential combinatorial prognostic value of NOTCH1, Vimentin (VIM), and Metastasis-associated 1 (MTA1) protein in LSCC, using immunohistochemistry. MATERIALS AND METHODS Tissue specimens from 69 patients with LSCC were immunohistochemically evaluated for the protein expression of NOTCH1, VIM, and MTA1. Then, biostatistical analysis was performed, in order to assess the prognostic value of the expression of each one of these proteins. RESULTS NOTCH1 expression status was not a significant prognosticator in LSCC, as shown in Kaplan-Meier survival analysis. On the contrary, both VIM and MTA1 seem to have an important prognostic potential, independently of TNM staging and histological grade of the tumor. In fact, positive VIM expression was shown to predict patients' relapse and poor outcome regarding patients' overall survival, in contrast with MTA1, the positive expression of which predicts higher disease-free survival (DFS) and overall survival (OS) rates in LSCC. CONCLUSIONS VIM and MTA1 constitute potential tumor biomarkers in LSCC and could be integrated into a multiparametric prognostic model. Undoubtedly, their prognostic value needs further validation in larger cohorts of LSCC patients.
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Affiliation(s)
- Sotirios Karamagkiolas
- First Department of Otolaryngology, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece.
| | - Ioannis Giotakis
- First Department of Otolaryngology, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Efthimios Kyrodimos
- First Department of Otolaryngology, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Evangelos I Giotakis
- First Department of Otolaryngology, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Agapi Kataki
- First Department of Propaedeutic Surgery, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Fani Karagianni
- First Department of Propaedeutic Surgery, Athens General Hospital "Hippokration", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Andreas M Lazaris
- Department of Vascular Surgery, University General Hospital "Attikon", Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
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4
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Kourtis A, Adamopoulos PG, Papalois A, Iliopoulos DC, Babis GC, Scorilas A. Quantitative analysis and study of the mRNA expression levels of apoptotic genes BCL2, BAX and BCL2L12 in the articular cartilage of an animal model of osteoarthritis. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:243. [PMID: 30069445 DOI: 10.21037/atm.2018.05.47] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Background Given that apoptosis of chondrocytes is one of the most important factors related to the pathogenesis of osteoarthritis (OA), the recent research interest adds progress not only to the knowledge of the molecular signals that mediate apoptosis but also to find new therapeutic targets. This study attempts to investigate the differential expression of BCL2 family genes in the articular cartilage of an experimental animal model of OA. Methods In total, 26 New Zealand white rabbits underwent an anterior cruciate ligament transaction, 26 more were subjected to a placebo surgery and 18 specimens constituted the control non-operated group. Thirteen weeks later, samples of cartilage from the osteoarthritic and non-osteoarthritic knees were collected and subjected to analysis of the BCL2, BAX and BCL2L12 gene expression at the mRNA level. Results Installed osteoarthritic alterations of varied intensity and of grade 1 up to grade 5, were confirmed according to the OARSI system. Contrary to the physiologically healthy samples, in the osteoarthritic samples the mRNA expression levels of BAX and BCL2L12 genes were found significantly upregulated by signals which can activate apoptosis. However, the difference between BCL2 mRNA expression levels in healthy and osteoarthritic samples was not supported statistically. Conclusions Since apoptosis is the main feature of the cartilage degeneration in OA, the effective inhibition of apoptosis of chondrocytes can provide novel and interesting therapeutic strategies for the treatment of OA. Therefore, BAX and BCL2L12 are highlighted as potential therapeutic targets in OA.
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Affiliation(s)
| | - Panagiotis G Adamopoulos
- Department of Biochemistry and Molecular Biology, National and Kapodistrian University of Athens, Athens, Greece
| | | | | | - George C Babis
- Second Orthopaedic Department, National and Kapodistrian University of Athens Medical School, Konstantopouleio General Hospital, Athens, Greece
| | - Andreas Scorilas
- Department of Biochemistry and Molecular Biology, National and Kapodistrian University of Athens, Athens, Greece
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Adamopoulos PG, Theodoropoulou MC, Scorilas A. Alternative Splicing Detection Tool-a novel PERL algorithm for sensitive detection of splicing events, based on next-generation sequencing data analysis. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:244. [PMID: 30069446 DOI: 10.21037/atm.2018.06.32] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Next-generation sequencing (NGS) can provide researchers with high impact information regarding alternative splice variants or transcript identifications. However, the enormous amount of data acquired from NGS platforms make the analysis of alternative splicing events hard to accomplish. For this reason, we designed the "Alternative Splicing Detection Tool" (ASDT), an algorithm that is capable of identifying alternative splicing events, including novel ones from high-throughput NGS data. ASDT is available as a PERL script at http://aias.biol.uoa.gr/~mtheo and can be executed on any system with PERL installed. In addition to the detection of annotated and novel alternative splicing events from high-throughput NGS data, ASDT can also analyze the intronic regions of genes, thus enabling the detection of novel cryptic exons residing in annotated introns, extensions of previously annotated exons, or even intron retentions. Consequently, ASDT demonstrates many innovative and unique features that can efficiently contribute to alternative splicing analysis of NGS data.
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Affiliation(s)
- Panagiotis G Adamopoulos
- Department of Biochemistry and Molecular Biology, National and Kapodistrian University of Athens, Panepistimiopolis, Athens, Greece
| | - Margarita C Theodoropoulou
- Department of Computer Science and Biomedical Informatics, University of Thessaly, Papasiopoulou, Lamia, Greece
| | - Andreas Scorilas
- Department of Biochemistry and Molecular Biology, National and Kapodistrian University of Athens, Panepistimiopolis, Athens, Greece
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Diamantopoulos MA, Tsiakanikas P, Scorilas A. Non-coding RNAs: the riddle of the transcriptome and their perspectives in cancer. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:241. [PMID: 30069443 DOI: 10.21037/atm.2018.06.10] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Non-coding RNAs (ncRNAs) constitute a heterogeneous group of RNA molecules in terms of biogenesis, biological function as well as length and structure. These biological molecules have gained attention recently as a potentially crucial layer of tumor cell progression or regulation. ncRNAs are expressed in a broad spectrum of tumors, and they play an important role not only in maintaining but also in promoting cancer development and progression. Recent discoveries have revealed that ncRNAs may act as key signal transduction mediators in tumor signaling pathways by interacting with RNA or proteins. These results reinforce the hypothesis, that ncRNAs constitute therapeutic targets, and point out their clinical potential as stratification markers. The major purpose of this review is to mention the emergence of the importance of ncRNAs, as molecules which are correlated with cancer, and to discuss their clinical implicit as prognostic diagnostic indicators, biomarkers, and therapeutic targets.
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Affiliation(s)
- Marios A Diamantopoulos
- Department of Biochemistry and Molecular Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Panagiotis Tsiakanikas
- Department of Biochemistry and Molecular Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Andreas Scorilas
- Department of Biochemistry and Molecular Biology, National and Kapodistrian University of Athens, Athens, Greece
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7
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Valka J, Vesela J, Votavova H, Dostalova-Merkerova M, Horakova Z, Campr V, Brezinova J, Zemanova Z, Jonasova A, Cermak J, Belickova M. Differential expression of homologous recombination DNA repair genes in the early and advanced stages of myelodysplastic syndrome. Eur J Haematol 2017; 99:323-331. [PMID: 28681469 DOI: 10.1111/ejh.12920] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2017] [Indexed: 12/31/2022]
Abstract
BACKGROUND The high incidence of mutations and cytogenetic abnormalities in patients with myelodysplastic syndrome (MDS) suggests that defects in DNA repair mechanisms. We monitored DNA repair pathways in MDS and their alterations during disease progression. METHODS Expression profiling of DNA repair genes was performed on CD34+ cells, and paired samples were used for monitoring of RAD51 and XRCC2 gene expression during disease progression. Immunohistochemical staining for RAD51 was done on histology samples. RESULTS RAD51 and XRCC2 showed differential expression between low-risk and high-risk MDS (P<.0001), whereas RPA3 was generally decreased among the entire cohort (FC=-2.65, P<.0001). We demonstrated that RAD51 and XRCC2 expression gradually decreased during the progression of MDS. Down-regulation of XRCC2 and RAD51 expression was connected with abnormalities on chromosome 7 (P=.0858, P=.0457). Immunohistochemical staining revealed the presence of RAD51 only in the cytoplasm in low-risk MDS, while in both the cytoplasm and nucleus in high-risk MDS. The multivariate analysis identified RAD51 expression level (HR 0.49; P=.01) as significant prognostic factor for overall survival of patients with MDS. CONCLUSIONS Our study demonstrates that the expression of DNA repair factors, primarily RAD51 and XRCC2, is deregulated in patients with MDS and presents a specific pattern with respect to prognostic categories.
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Affiliation(s)
- Jan Valka
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Jitka Vesela
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Hana Votavova
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | | | - Zuzana Horakova
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Vit Campr
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czech Republic
| | - Jana Brezinova
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Zuzana Zemanova
- Center of Oncocytogenetics, General University Hospital and First Faculty of Medicine of Charles University, Prague, Czech Republic
| | - Anna Jonasova
- First Internal Clinic-Clinic of Hematology, General University Hospital, Prague, Czech Republic
| | - Jaroslav Cermak
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Monika Belickova
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
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8
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Jessri M, Dalley AJ, Farah CS. Deficient double-strand break repair in oral squamous cell carcinoma cell lines. J Oral Pathol Med 2017; 46:695-702. [PMID: 28383762 DOI: 10.1111/jop.12576] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND Approximately 20% of oral squamous cell carcinoma (OSCC) cases arise without any identifiable environmental cause, suggesting involvement of genetic influences in their aetiology. DNA double-strand breaks (DSBs) sever both strands of DNA and pose a potential threat to genomic integrity. A hastened accumulation of somatic mutations consequent to DSB repair is deemed to be a likely event in tumorigenesis of OSCC. METHODS Two discrete chemical approaches, namely hydrogen peroxide and camptothecin, were used to induce DSB in oral cell lines derived from normal through dysplastic to OSCC tissues. After optimization, gamma histone 2Ax (γH2Ax) foci were counted as an indirect measure of kinetics of DSB and confirmed with Western blot of γH2Ax, Nbs1 and ATM. RESULTS Maximal number of γH2Ax foci was detected 1 and 2 hours post-exposure to camptothecin and hydrogen peroxide, respectively; when adjusted for the baseline number of γH2Ax, neoplastic cell lines showed the lowest number of maximal DSB and slowest rate of repair compared to other cell lines. γH2 Ax Western blot closely mirrored the trend observed in immunofluorescent staining for γH2 Ax foci. Changes in the expression level of ATM and Nbs1 were minimal; however, ATM expression showed a slight gradual increase in normal cells which reached its peak at 2 hours after exposure to camptothecin. CONCLUSIONS There is a difference in efficiency of DSB repair pathways in cell lines derived from different stages of oral tumorigenesis with neoplastic cell lines having the most defective DSB repair system.
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Affiliation(s)
- Maryam Jessri
- Oral Oncology Research Program, UQ Centre for Clinical Research, The University of Queensland, Herston, Qld, Australia
| | - Andrew J Dalley
- Oral Oncology Research Program, UQ Centre for Clinical Research, The University of Queensland, Herston, Qld, Australia
| | - Camile S Farah
- Oral Oncology Research Program, UQ Centre for Clinical Research, The University of Queensland, Herston, Qld, Australia.,Australian Centre for Oral Oncology Research & Education, School of Dentistry, University of Western Australia, Nedlands, WA, Australia
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9
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Increase of DNA damage and alteration of the DNA damage response in myelodysplastic syndromes and acute myeloid leukemias. Leuk Res 2017; 57:112-118. [PMID: 28359030 DOI: 10.1016/j.leukres.2017.03.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 03/09/2017] [Accepted: 03/20/2017] [Indexed: 11/23/2022]
Abstract
Increased DNA damage and alteration of the DNA damage response (DDR) are critical features of genetic instability presumably implicated in pathogenesis of myelodysplastic syndromes (MDS) and acute myeloid leukemias (AML). We used immunofluorescence staining of γH2AX and 53BP1 for analyzing DNA double-strand breaks (DSB) in MDS and AML cell lines, in CD34+ selected cells of normal and MDS bone marrow (including three cases of chronic myelomonocytic leukemias) and in blasts of AML bone marrow. In addition, we screened for activation of the DDR by immunoblotting of p-ATM, p-ATR, p-CHK1, p-CHK2 and p-TP53. As compared to γH2AX foci levels in normal bone marrow samples (0.2 focus per CD34+ cell±0.0; mean±standard error of mean), increased levels of γH2AX foci were detected in 16/16 MDS bone marrow samples (2.8 foci per CD34+ cell±0.5), 18/18 AML bone marrow samples (5.5 foci per blast±0.5), 1/1 MDS cell line (6.4 foci per cell) and 6/6 AML cell lines (12.0 foci per cell±0.6). γH2AX and 53BP1 co-localized in all tested samples forming diffuse, clustered and marginal patterns. Further, DDR proteins were expressed heterogeneously suggesting impairment of the DDR. In summary, our results provide evidence for a continuous increase of DSB across the spectrum from MDS to AML in conjunction with an impaired DDR. Co-localization of γH2AX and 53BP1 indicates promotion of (in)effective nonhomologous end-joining repair mechanisms at sites of DSB. Moreover, γH2AX/53BP1 foci distribution presumably reveals a non-random spatial organization of the genome in MDS and AML.
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10
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Papageorgiou SG, Vasilatou D, Kontos CK, Foukas P, Kefala M, Ioannidou ED, Bouchla A, Bazani E, Dimitriadis G, Pappa V. Treatment with 5-Azacytidine improves clinical outcome in high-risk MDS patients in the 'real life' setting: A single center observational study. ACTA ACUST UNITED AC 2015. [PMID: 26218077 DOI: 10.1179/1607845415y.0000000039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
OBJECTIVES The demethylating factor 5-Azacytidine (5-AZA) improves survival of patients with myelodysplastic syndromes (MDS) in randomized control trials but the results in 'real life' are controversial. METHODS In this retrospective study, we evaluated the outcome of 56 high-risk MDS patients who were treated with 5-AZA between 2005 and 2013. 5-AZA was administered in an outpatient basis at a dose 75 mg/m(2) s.c. with the following schedule: 5 days on/weekend off/2 days on (5/2/2). RESULTS The overall response rate (ORR) was 50%; 21.2% patients achieved complete response (CR), 3.8% partial response (PR), and 25% hematologic improvement (HI); 34.6% had stable disease (SD) and 15.4% showed progressive disease (PD). The estimated median event free survival (EFS) and overall survival (OS) were 11 and 17 months, respectively. Interestingly, the estimated time to acute myeloid leukemia transformation was 30 months, which refers to patients who responded to AZA treatment or remained stable. Patients who responded to the 5-AZA achieving CR, PR, and HI had better EFS and OS compared to the patients who had SD or PD. In addition, Δ WHO Classification-based Prognostic Score System (ΔWPSS), which represents the improvement of WPSS risk group before and after treatment, was associated with significantly improved OS and better EFS. Finally, the response to treatment was not associated with the expression of p53. CONCLUSIONS In conclusion, 5-AZA is an effective treatment for high-risk MDS. Improved OS and EFS were found mainly in patients who responded to the treatment while ΔWPSS seems to represent a promising future prognostic tool.
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MESH Headings
- Aged
- Aged, 80 and over
- Antimetabolites, Antineoplastic/therapeutic use
- Azacitidine/therapeutic use
- Drug Administration Schedule
- Female
- Gene Expression
- Humans
- Leukemia, Myeloid, Acute/diagnosis
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/etiology
- Leukemia, Myeloid, Acute/mortality
- Male
- Middle Aged
- Myelodysplastic Syndromes/complications
- Myelodysplastic Syndromes/diagnosis
- Myelodysplastic Syndromes/drug therapy
- Myelodysplastic Syndromes/mortality
- Prognosis
- Remission Induction
- Retrospective Studies
- Risk Assessment
- Survival Analysis
- Treatment Outcome
- Tumor Suppressor Protein p53/genetics
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11
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Perry C, Agarwal D, Abdel-Fatah TMA, Lourdusamy A, Grundy R, Auer DT, Walker D, Lakhani R, Scott IS, Chan S, Ball G, Madhusudan S. Dissecting DNA repair in adult high grade gliomas for patient stratification in the post-genomic era. Oncotarget 2015; 5:5764-81. [PMID: 25026297 PMCID: PMC4170616 DOI: 10.18632/oncotarget.2180] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Deregulation of multiple DNA repair pathways may contribute to aggressive biology and therapy resistance in gliomas. We evaluated transcript levels of 157 genes involved in DNA repair in an adult glioblastoma Test set (n=191) and validated in ‘The Cancer Genome Atlas’ (TCGA) cohort (n=508). A DNA repair prognostic index model was generated. Artificial neural network analysis (ANN) was conducted to investigate global gene interactions. Protein expression by immunohistochemistry was conducted in 61 tumours. A fourteen DNA repair gene expression panel was associated with poor survival in Test and TCGA cohorts. A Cox multivariate model revealed APE1, NBN, PMS2, MGMT and PTEN as independently associated with poor prognosis. A DNA repair prognostic index incorporating APE1, NBN, PMS2, MGMT and PTEN stratified patients in to three prognostic sub-groups with worsening survival. APE1, NBN, PMS2, MGMT and PTEN also have predictive significance in patients who received chemotherapy and/or radiotherapy. ANN analysis of APE1, NBN, PMS2, MGMT and PTEN revealed interactions with genes involved in transcription, hypoxia and metabolic regulation. At the protein level, low APE1 and low PTEN remain associated with poor prognosis. In conclusion, multiple DNA repair pathways operate to influence biology and clinical outcomes in adult high grade gliomas.
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Affiliation(s)
- Christina Perry
- Academic Unit of Oncology, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Nottingham University Hospitals, Nottingham, UK
| | - Devika Agarwal
- School of Science and Technology, Nottingham Trent University, Clifton Campus, Nottingham, UK
| | - Tarek M A Abdel-Fatah
- Department of Oncology, Nottingham University Hospitals, City Hospital Campus, Nottingham, UK
| | - Anbarasu Lourdusamy
- Children's Brain Tumour Research Centre, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Queen's Medical Centre, Nottingham University Hospitals, Nottingham, UK
| | - Richard Grundy
- Children's Brain Tumour Research Centre, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Queen's Medical Centre, Nottingham University Hospitals, Nottingham, UK
| | - Dorothee T Auer
- Department of Academic Radiology, University of Nottingham, Nottingham University Hospitals, Queen's Medical Centre, Nottingham, UK
| | - David Walker
- Children's Brain Tumour Research Centre, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Queen's Medical Centre, Nottingham University Hospitals, Nottingham, UK
| | - Ravi Lakhani
- University of Leicester Medical School, Maurice Shock Building, University Road, Leicester, UK
| | - Ian S Scott
- Department of Neuropathology, Nottingham University Hospitals, Queen's Medical Centre, Nottingham, UK
| | - Stephen Chan
- Department of Oncology, Nottingham University Hospitals, City Hospital Campus, Nottingham, UK
| | - Graham Ball
- School of Science and Technology, Nottingham Trent University, Clifton Campus, Nottingham, UK
| | - Srinivasan Madhusudan
- Academic Unit of Oncology, Division of Cancer and Stem Cells, School of Medicine, University of Nottingham, Nottingham University Hospitals, Nottingham, UK; Department of Oncology, Nottingham University Hospitals, City Hospital Campus, Nottingham, UK
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Denoyer D, Lobachevsky P, Jackson P, Thompson M, Martin OA, Hicks RJ. Analysis of 177Lu-DOTA-Octreotate Therapy–Induced DNA Damage in Peripheral Blood Lymphocytes of Patients with Neuroendocrine Tumors. J Nucl Med 2015; 56:505-11. [DOI: 10.2967/jnumed.114.145581] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 12/08/2014] [Indexed: 12/24/2022] Open
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