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de Haan LM, de Groen RAL, de Groot FA, Noordenbos T, van Wezel T, van Eijk R, Ruano D, Diepstra A, Koens L, Nicolae-Cristea A, Hartog WCED, Terpstra V, Ahsmann E, Dekker TJA, Sijs-Szabo A, Veelken H, Cleven AHG, Jansen PM, Vermaat JSP. Real-world routine diagnostic molecular analysis for TP53 mutational status is recommended over p53 immunohistochemistry in B-cell lymphomas. Virchows Arch 2023:10.1007/s00428-023-03676-6. [PMID: 37851120 DOI: 10.1007/s00428-023-03676-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/20/2023] [Accepted: 10/04/2023] [Indexed: 10/19/2023]
Abstract
Previous studies in patients with mature B-cell lymphomas (MBCL) have shown that pathogenic TP53 aberrations are associated with inferior chemotherapeutic efficacy and survival outcomes. In solid malignancies, p53 immunohistochemistry is commonly used as a surrogate marker to assess TP53 mutations, but this correlation is not yet well-established in lymphomas. This study evaluated the accuracy of p53 immunohistochemistry as a surrogate marker for TP53 mutational analysis in a large real-world patient cohort of 354 MBCL patients within routine diagnostic practice. For each case, p53 IHC was assigned to one of three categories: wild type (staining 1-50% of tumor cells with variable nuclear staining), abnormal complete absence or abnormal overexpression (strong and diffuse staining > 50% of tumor cells). Pathogenic variants of TP53 were identified with a targeted next generation sequencing (tNGS) panel. Wild type p53 expression was observed in 267 cases (75.4%), complete absence in twenty cases (5.7%) and the overexpression pattern in 67 cases (18.9%). tNGS identified a pathogenic TP53 mutation in 102 patients (29%). The overall accuracy of p53 IHC was 84.5% (95% CI 80.3-88.1), with a robust specificity of 92.1% (95% CI 88.0- 95.1), but a low sensitivity of 65.7% (95% CI 55.7-74.8). These results suggest that the performance of p53 IHC is insufficient as a surrogate marker for TP53 mutations in our real-world routine diagnostic workup of MBCL patients. By using p53 immunohistochemistry alone, there is a significant risk a TP53 mutation will be missed, resulting in misevaluation of a high-risk patient. Therefore, molecular analysis is recommended in all MBCL patients, especially for further development of risk-directed therapies based on TP53 mutation status.
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Affiliation(s)
- Lorraine M de Haan
- Department of Pathology, Leiden University Medical Center, L1-Q, P.O. box 9600, 2300RC, Leiden, The Netherlands.
| | - Ruben A L de Groen
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Fleur A de Groot
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Troy Noordenbos
- Department of Pathology, Leiden University Medical Center, L1-Q, P.O. box 9600, 2300RC, Leiden, The Netherlands
| | - Tom van Wezel
- Department of Pathology, Leiden University Medical Center, L1-Q, P.O. box 9600, 2300RC, Leiden, The Netherlands
| | - Ronald van Eijk
- Department of Pathology, Leiden University Medical Center, L1-Q, P.O. box 9600, 2300RC, Leiden, The Netherlands
| | - Dina Ruano
- Department of Pathology, Leiden University Medical Center, L1-Q, P.O. box 9600, 2300RC, Leiden, The Netherlands
| | - Arjan Diepstra
- Department of Pathology, University Medical Center Groningen, Groningen, The Netherlands
| | - Lianne Koens
- Department of Pathology, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | | | | | - Valeska Terpstra
- Department of Pathology, Haaglanden Medical Centrum, The Hague, The Netherlands
| | - Els Ahsmann
- Department of Pathology, Groene Hart Ziekenhuis, Gouda, The Netherlands
| | - Tim J A Dekker
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Aniko Sijs-Szabo
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Hendrik Veelken
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Arjen H G Cleven
- Department of Pathology, Leiden University Medical Center, L1-Q, P.O. box 9600, 2300RC, Leiden, The Netherlands
- Department of Pathology, University Medical Center Groningen, Groningen, The Netherlands
| | - Patty M Jansen
- Department of Pathology, Leiden University Medical Center, L1-Q, P.O. box 9600, 2300RC, Leiden, The Netherlands
| | - Joost S P Vermaat
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
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Li Z, Pan G, Zhong M, Zhang L, Yu X, Zha J, Xu B. High-Throughput Drug Screen for Potential Combinations With Venetoclax Guides the Treatment of Transformed Follicular Lymphoma. Int J Toxicol 2023; 42:386-406. [PMID: 37271574 DOI: 10.1177/10915818231178693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Transformed follicular lymphoma (t-FL) is an aggressive malignancy that is refractory and rapidly progressing with poor prognosis. There is currently no effective treatment. High-throughput screening (HTS) platforms are used to profile the sensitivity or toxicity of hundreds of drug molecules, and this approach is applied to identify potential effective treatments for t-FL. We randomly selected a compound panel from the School of Pharmaceutical Sciences Xiamen University, tested the effects of the panel on the activity of t-FL cell lines using HTS and the CCK-8 assay, and identified compounds showing synergistic anti-proliferative activity with the Bcl-2 inhibitor venetoclax (ABT-199). Bioinformatics tools were used to analyze the potential synergistic mechanisms. The single-concentration compound library demonstrated varying degrees of activity across the t-FL cell lines evaluated, of which the Karpas422 cells were the most sensitive, but it was the cell line with the least synergy with ABT-199. We computationally identified 30 drugs with synergistic effects in all cell lines. Molecularly, we found that the targets of these 30 drugs didn't directly regulate Bcl-2 and identified 13 medications with high evidence value above .9 of coordination with ABT-199, further confirming TP53 may play the largest role in the synergistic effect. Collectively, these findings identified the combined regimens of ABT-199 and further suggested that the mechanism is far from directly targeting Bcl-2, but rather through the regulation and synergistic action of p53 and Bcl-2. This study intended to reveal the best synergistic scheme of ABT-199 through HTS to more quickly inform the treatment of t-FL.
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Affiliation(s)
- Zhifeng Li
- The School of Clinical Medicine, Fujian Medical University, Fuzhou, China
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China
- Key laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Guangchao Pan
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China
- Key laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Mengya Zhong
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China
- Key laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Li Zhang
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China
- Key laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Xingxing Yu
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China
- Key laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Jie Zha
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China
- Key laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Bing Xu
- The School of Clinical Medicine, Fujian Medical University, Fuzhou, China
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China
- Key laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
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Karati D, Kumar D. A Comprehensive Review on Targeted Cancer Therapy: New Face of Treatment Approach. Curr Pharm Des 2023; 29:3282-3294. [PMID: 38038008 DOI: 10.2174/0113816128272203231121034814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/11/2023] [Accepted: 10/16/2023] [Indexed: 12/02/2023]
Abstract
Cancer is one of life's most difficult difficulties and a severe health risk everywhere. Except for haematological malignancies, it is characterized by unchecked cell growth and a lack of cell death, which results in an aberrant tissue mass or tumour. Vascularization promotes tumor growth, which eventually aids metastasis and migration to other parts of the body, ultimately resulting in death. The genetic material of the cells is harmed or mutated by environmental or inherited influences, which results in cancer. Presently, anti-neoplastic medications (chemotherapy, hormone, and biological therapies) are the treatment of choice for metastatic cancers, whilst surgery and radiotherapy are the mainstays for local and non-metastatic tumors. Regrettably, chemotherapy disturbs healthy cells with rapid proliferation, such as those in the gastrointestinal tract and hair follicles, leading to the typical side effects of chemotherapy. Finding new, efficient, targeted therapies based on modifications in the molecular biology of tumor cells is essential because current chemotherapeutic medications are harmful and can cause the development of multidrug resistance. These new targeted therapies, which are gaining popularity as demonstrated by the FDA-approved targeted cancer drugs in recent years, enter molecules directly into tumor cells, diminishing the adverse reactions. A form of cancer treatment known as targeted therapy goes after the proteins that regulate how cancer cells proliferate, divide, and disseminate. Most patients with specific cancers, such as chronic myelogenous leukemia (commonly known as CML), will have a target for a particular medicine, allowing them to be treated with that drug. Nonetheless, the tumor must typically be examined to determine whether it includes drug targets.
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Affiliation(s)
- Dipanjan Karati
- Department of Pharmaceutical Chemistry, School of Pharmacy, Techno India University, Kolkata 700091, West Bengal 900017, India
| | - Dileep Kumar
- Department of Pharmaceutical Chemistry, Poona College of Pharmacy, Bharti Vidyapeeth, Pune, Maharashtra 411038, India
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Murakami Y, Kimura-Masuda K, Oda T, Matsumura I, Masuda Y, Ishihara R, Watanabe S, Kuroda Y, Kasamatsu T, Gotoh N, Takei H, Kobayashi N, Saitoh T, Murakami H, Handa H. MYC Causes Multiple Myeloma Progression via Attenuating TP53-Induced MicroRNA-34 Expression. Genes (Basel) 2022; 14:100. [PMID: 36672841 PMCID: PMC9859619 DOI: 10.3390/genes14010100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 12/23/2022] [Accepted: 12/24/2022] [Indexed: 12/31/2022] Open
Abstract
MicroRNAs (miRNAs and miRs) are small (19-25 base pairs) non-coding RNAs with the ability to modulate gene expression. Previously, we showed that the miR-34 family is downregulated in multiple myeloma (MM) as the cancer progressed. In this study, we aimed to clarify the mechanism of miRNA dysregulation in MM. We focused particularly on the interaction between MYC and the TP53-miR34 axis because there is a discrepancy between increased TP53 and decreased miR-34 expressions in MM. Using the nutlin-3 or Tet-on systems, we caused wild-type (WT) p53 protein accumulation in human MM cell lines (HMCLs) and observed upregulated miR-34 expression. Next, we found that treatment with an Myc inhibitor alone did not affect miR-34 expression levels, but when it was coupled with p53 accumulation, miR-34 expression increased. In contrast, forced MYC activation by the MYC-ER system reduced nutlin-3-induced miR-34 expression. We also observed that TP53 and MYC were negatively correlated with mature miR-34 expressions in the plasma cells of patients with MM. Our results suggest that MYC participates in the suppression of p53-dependent miRNA expressions. Because miRNA expression suppresses tumors, its inhibition leads to MM development and malignant transformation.
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Affiliation(s)
- Yuki Murakami
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi 371-8510, Japan
| | - Kei Kimura-Masuda
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi 371-8510, Japan
| | - Tsukasa Oda
- Laboratory of Mucosal Ecosystem Design, The Institute for Molecular and Cellular Regulation, Gunma University, Maebashi 371-8510, Japan
| | - Ikuko Matsumura
- Department of Hematology, Gunma University Graduate School of Medicine, Maebashi 371-8510, Japan
| | - Yuta Masuda
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi 371-8510, Japan
- Faculty of Medical Technology and Clinical Engineering, Gunma University of Health and Welfare, Maebashi 371-0823, Japan
| | - Rei Ishihara
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi 371-8510, Japan
| | - Saki Watanabe
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi 371-8510, Japan
| | - Yuko Kuroda
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi 371-8510, Japan
| | - Tetsuhiro Kasamatsu
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi 371-8510, Japan
| | - Nanami Gotoh
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi 371-8510, Japan
| | - Hisashi Takei
- Department of Hematology, Gunma University Graduate School of Medicine, Maebashi 371-8510, Japan
| | - Nobuhiko Kobayashi
- Department of Hematology, Gunma University Graduate School of Medicine, Maebashi 371-8510, Japan
| | - Takayuki Saitoh
- Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, Maebashi 371-8510, Japan
| | - Hirokazu Murakami
- Faculty of Medical Technology and Clinical Engineering, Gunma University of Health and Welfare, Maebashi 371-0823, Japan
| | - Hiroshi Handa
- Department of Hematology, Gunma University Graduate School of Medicine, Maebashi 371-8510, Japan
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5
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Cell-intrinsic factors governing quiescence vis-à-vis activation of adult hematopoietic stem cells. Mol Cell Biochem 2022; 478:1361-1382. [PMID: 36309884 DOI: 10.1007/s11010-022-04594-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/13/2022] [Indexed: 10/31/2022]
Abstract
Hematopoiesis is a highly complex process, regulated by both intrinsic and extrinsic factors. Often, these two regulatory arms work in tandem to maintain the steady-state condition of hematopoiesis. However, at times, certain intrinsic attributes of hematopoietic stem cells (HSCs) override the external stimuli and dominate the outcome. These could be genetic events like mutations or environmentally induced epigenetic or transcriptomic changes. Since leukemic stem cells (LSCs) share molecular pathways that also regulate normal HSCs, identifying specific, dominantly acting intrinsic factors could help in the development of novel therapeutic approaches. Here we have reviewed such dominantly acting intrinsic factors governing quiescence vis-à-vis activation of the HSCs in the face of external forces acting on them. For brevity, we have restricted our review to the articles dealing with adult HSCs of human and mouse origin that have been published in the last 10 years. Hematopoietic stem cells (HSCs) are closely associated with various stromal cells in their microenvironment and, thus, constantly receive signaling cues from them. The illustration depicts some dominantly acting intrinsic or cell-autonomous factors operative in the HSCs. These fall into various categories, such as epigenetic regulators, transcription factors, cell cycle regulators, tumor suppressor genes, signaling pathways, and metabolic regulators, which counteract the outcome of extrinsic signaling exerted by the HSC niche.
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6
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Rad54L promotes bladder cancer progression by regulating cell cycle and cell senescence. MEDICAL ONCOLOGY (NORTHWOOD, LONDON, ENGLAND) 2022; 39:185. [PMID: 36071250 DOI: 10.1007/s12032-022-01751-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 05/13/2022] [Indexed: 10/14/2022]
Abstract
Bladder cancer (BCa) is the most prevalent cancer of the urinary system, but its pathogenesis is still poorly understood. Several reports have suggested that gene damage repair is highly correlated with tumor development and drug resistance, in which homologous recombination repair gene Rad54L seems to play an important role, through yet unclear mechanisms. Therefore, this study stratified cancer patients by Rad54L expression in BCa tissue, and high Rad54L expression was associated with a poor prognosis. Mechanistically, we demonstrate that high Rad54L expression promotes abnormal bladder tumor cell proliferation by changing the cell cycle and cell senescence. In addition, this study also suggests that Rad54L may be associated with p53, p21, and pRB in BCa tissue. In summary, this study exposes Rad54L as potential a prognostic biomarker and precision treatment target in BCa.
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Uncovering Oncogenic Mechanisms of Tumor Suppressor Genes in Breast Cancer Multi-Omics Data. Int J Mol Sci 2022; 23:ijms23179624. [PMID: 36077026 PMCID: PMC9455665 DOI: 10.3390/ijms23179624] [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: 07/03/2022] [Revised: 08/16/2022] [Accepted: 08/19/2022] [Indexed: 11/17/2022] Open
Abstract
Tumor suppressor genes (TSGs) are essential genes in the development of cancer. While they have many roles in normal cells, mutation and dysregulation of the TSGs result in aberrant molecular processes in cancer cells. Therefore, understanding TSGs and their roles in the oncogenic process is crucial for prevention and treatment of cancer. In this research, multi-omics breast cancer data were used to identify molecular mechanisms of TSGs in breast cancer. Differentially expressed genes and differentially coexpressed genes were identified in four large-scale transcriptomics data from public repositories and multi-omics data analyses of copy number, methylation and gene expression were performed. The results of the analyses were integrated using enrichment analysis and meta-analysis of a p-value summation method. The integrative analysis revealed that TSGs have a significant relationship with genes of gene ontology terms that are related to cell cycle, genome stability, RNA processing and metastasis, indicating the regulatory mechanisms of TSGs on cancer cells. The analysis frame and research results will provide valuable information for the further identification of TSGs in different types of cancers.
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Schirripa A, Sexl V, Kollmann K. Cyclin-dependent kinase inhibitors in malignant hematopoiesis. Front Oncol 2022; 12:916682. [PMID: 36033505 PMCID: PMC9403899 DOI: 10.3389/fonc.2022.916682] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 07/18/2022] [Indexed: 11/13/2022] Open
Abstract
The cell-cycle is a tightly orchestrated process where sequential steps guarantee cellular growth linked to a correct DNA replication. The entire cell division is controlled by cyclin-dependent kinases (CDKs). CDK activation is balanced by the activating cyclins and CDK inhibitors whose correct expression, accumulation and degradation schedule the time-flow through the cell cycle phases. Dysregulation of the cell cycle regulatory proteins causes the loss of a controlled cell division and is inevitably linked to neoplastic transformation. Due to their function as cell-cycle brakes, CDK inhibitors are considered as tumor suppressors. The CDK inhibitors p16INK4a and p15INK4b are among the most frequently altered genes in cancer, including hematopoietic malignancies. Aberrant cell cycle regulation in hematopoietic stem cells (HSCs) bears severe consequences on hematopoiesis and provokes hematological disorders with a broad array of symptoms. In this review, we focus on the importance and prevalence of deregulated CDK inhibitors in hematological malignancies.
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Houschyar KS, Borrelli MR, Rein S, Tapking C, Popp D, Palackic A, Puladi B, Ooms M, Houschyar M, Branski LK, Schmitt L, Modabber A, Rübben A, Hölzle F, Yazdi AS. Head and neck squamous cell carcinoma: a potential therapeutic target for the Wnt signaling pathway. EUROPEAN JOURNAL OF PLASTIC SURGERY 2022. [DOI: 10.1007/s00238-022-01958-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Abstract
Squamous cell carcinoma (SCC) of the head and neck region accounts for 3% of all tumors worldwide. The incidence is higher in men, with most carcinomas found in the oral cavity. At the point of initial diagnosis, distant metastases are rare. The Wnt signaling pathway is critically involved in cell development and stemness and has been associated with SCC. Understanding precisely how Wnt signaling regulates SCC progression and how it can, therefore, be modulated for the therapeutic benefit has enormous potential in the treatment of head and neck SCC. In this review, we will describe the underlying mechanisms of Wnt signaling and outline how Wnt signaling controls cellular processes both in homeostasis and in the development and progression of SCC.Level of evidence: Not gradable.
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Liu Y, Ma G, Gao Z, Li J, Wang J, Zhu X, Ma R, Yang J, Zhou Y, Hu K, Zhang Y, Guo Y. Global chromosome rearrangement induced by CRISPR-Cas9 reshapes the genome and transcriptome of human cells. Nucleic Acids Res 2022; 50:3456-3474. [PMID: 35244719 PMCID: PMC8989517 DOI: 10.1093/nar/gkac153] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 01/29/2022] [Accepted: 02/19/2022] [Indexed: 11/25/2022] Open
Abstract
Chromosome rearrangement plays important roles in development, carcinogenesis and evolution. However, its mechanism and subsequent effects are not fully understood. Large-scale chromosome rearrangement has been performed in the simple eukaryote, wine yeast, but the relative research in mammalian cells remains at the level of individual chromosome rearrangement due to technical limitations. In this study, we used CRISPR-Cas9 to target the highly repetitive human endogenous retrotransposons, LINE-1 and Alu, resulting in a large number of DNA double-strand breaks in the chromosomes. While this operation killed the majority of the cells, we eventually obtained live cell groups. Karyotype analysis and genome re-sequencing proved that we have achieved global chromosome rearrangement (GCR) in human cells. The copy number variations of the GCR genomes showed typical patterns observed in tumor genomes. The ATAC-seq and RNA-seq further revealed that the epigenetic and transcriptomic landscapes were deeply reshaped by GCR. Gene expressions related to p53 pathway, DNA repair, cell cycle and apoptosis were greatly altered to facilitate the cell survival. Our study provided a new application of CRISPR-Cas9 and a practical approach for GCR in complex mammalian genomes.
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Affiliation(s)
- Ying Liu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Guangwei Ma
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Zenghong Gao
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Jian Li
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Jin Wang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Xiangping Zhu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Ruowu Ma
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Jiawen Yang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Yiting Zhou
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Kaishun Hu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Yin Zhang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Yabin Guo
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
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11
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Li C, Zhao X, He Y, Li Z, Qian J, Zhang L, Ye Q, Qiu F, Lian P, Qian M, Zhang H. The functional role of inherited CDKN2A variants in childhood acute lymphoblastic leukemia. Pharmacogenet Genomics 2022; 32:43-50. [PMID: 34369425 PMCID: PMC8694244 DOI: 10.1097/fpc.0000000000000451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 07/13/2021] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Genetic alterations in CDKN2A tumor suppressor gene on chromosome 9p21 confer a predisposition to childhood acute lymphoblastic leukemia (ALL). Genome-wide association studies have identified missense variants in CDKN2A associated with the development of ALL. This study systematically evaluated the effects of CDKN2A coding variants on ALL risk. METHODS We genotyped the CDKN2A coding region in 308 childhood ALL cases enrolled in CCCG-ALL-2015 clinical trials by Sanger Sequencing. Cell growth assay, cell cycle assay, MTT-based cell toxicity assay, and western blot were performed to assess the CDKN2A coding variants on ALL predisposition. RESULTS We identified 10 novel exonic germline variants, including 6 missense mutations (p.A21V, p.G45A and p.V115L of p16INK4A; p.T31R, p.R90G, and p.R129L of p14ARF) and 1 nonsense mutation and 1 heterozygous termination codon mutation in exon 2 (p16INK4A p.S129X). Functional studies indicate that five novel variants resulted in reduced tumor suppressor activity of p16INK4A, and increased the susceptibility to the leukemic transformation of hematopoietic progenitor cells. Compared to other variants, p.H142R contributes higher sensitivity to CDK4/6 inhibitors. CONCLUSION These findings provide direct insight into the influence of inherited genetic variants at the CDKN2A coding region on the development of ALL and the precise clinical application of CDK4/6 inhibitors.
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Affiliation(s)
- Chunjie Li
- Department of Hematology/Oncology
- Institute of Pediatrics, Affiliated Guangzhou Women and Children’s Medical Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou
| | - Xinying Zhao
- Department of Hematology/Oncology
- Institute of Pediatrics, Affiliated Guangzhou Women and Children’s Medical Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou
| | | | - Ziping Li
- Department of Hematology/Oncology
- Institute of Pediatrics, Affiliated Guangzhou Women and Children’s Medical Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou
| | - Jiabi Qian
- Department of Hematology/Oncology
- Institute of Pediatrics, Affiliated Guangzhou Women and Children’s Medical Center, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou
| | - Li Zhang
- Department of Hematology/Oncology
| | - Qian Ye
- Department of Hematology/Oncology
| | - Fei Qiu
- Bioinspired Engineering and Biomechanics Center, Xi’an Jiaotong University, Xi’an, China
| | - Peng Lian
- Lyda Hill Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Maoxiang Qian
- Institute of Pediatrics and Department of Hematology and Oncology, Children’s Hospital of Fudan University, National Children’s Medical Center, the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology), Institutes of Biomedical Sciences, Fudan University, Shanghai, China
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12
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Boldrin E, Gaffo E, Niedermayer A, Boer JM, Zimmermann M, Weichenhan D, Claus R, Münch V, Sun Q, Enzenmüller S, Seyfried F, Demir S, Zinngrebe J, Cario G, Schrappe M, Den Boer ML, Plass C, Debatin KM, Te Kronnie G, Bortoluzzi S, Meyer LH. MicroRNA-497/195 is tumor suppressive and cooperates with CDKN2A/B in pediatric acute lymphoblastic leukemia. Blood 2021; 138:1953-1965. [PMID: 34098582 DOI: 10.1182/blood.2020007591] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 05/24/2021] [Indexed: 11/20/2022] Open
Abstract
We previously identified an association of rapid engraftment of patient-derived leukemia cells transplanted into NOD/SCID mice with early relapse in B-cell precursor acute lymphoblastic leukemia (BCP-ALL). In a search for the cellular and molecular profiles associated with this phenotype, we investigated the expression of microRNAs (miRNAs) in different engraftment phenotypes and patient outcomes. We found high expression of miR-497 and miR-195 (hereafter miR-497/195) in patient-derived xenograft samples with slow engraftment derived from patients with favorable outcome. In contrast, epigenetic repression and low expression of these miRNAs was observed in rapidly engrafting samples associated with early relapse. Overexpression of miR-497/195 in patient-derived leukemia cells suppressed in vivo growth of leukemia and prolonged recipient survival. Conversely, inhibition of miR-497/195 led to increased leukemia cell growth. Key cell cycle regulators were downregulated upon miR-497/195 overexpression, and we identified cyclin-dependent kinase 4 (CDK4)- and cyclin-D3 (CCND3)-mediated control of G1/S transition as a principal mechanism for the suppression of BCP-ALL progression by miR-497/195. The critical role for miR-497/195-mediated cell cycle regulation was underscored by finding (in an additional independent series of patient samples) that high expression of miR-497/195 together with a full sequence for CDKN2A and CDKN2B (CDKN2A/B) was associated with excellent outcome, whereas deletion of CDKN2A/B together with low expression of miR-497/195 was associated with clearly inferior relapse-free survival. These findings point to the cooperative loss of cell cycle regulators as a new prognostic factor indicating possible therapeutic targets for pediatric BCP-ALL.
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Affiliation(s)
- Elena Boldrin
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
- Department of Biology, University of Padua, Padua, Italy
| | - Enrico Gaffo
- Department of Molecular Medicine, Padua University, Padua, Italy
| | - Alexandra Niedermayer
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Judith M Boer
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Martin Zimmermann
- Department of Pediatric Hematology and Oncology, Medical School Hannover, Hannover, Germany
| | - Dieter Weichenhan
- Division of Cancer Epigenomics, German Cancer Research Center, Heidelberg, Germany
| | - Rainer Claus
- Division of Cancer Epigenomics, German Cancer Research Center, Heidelberg, Germany
- Department of Hematology/Oncology, Augsburg University Medical Center, Augsburg, Germany
| | - Vera Münch
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Qian Sun
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Stefanie Enzenmüller
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Felix Seyfried
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Salih Demir
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Julia Zinngrebe
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Gunnar Cario
- Pediatric Hematology and Oncology, University Hospital Schleswig Holstein, Campus Kiel, Germany
| | - Martin Schrappe
- Pediatric Hematology and Oncology, University Hospital Schleswig Holstein, Campus Kiel, Germany
| | - Monique L Den Boer
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Christoph Plass
- Division of Cancer Epigenomics, German Cancer Research Center, Heidelberg, Germany
| | - Klaus-Michael Debatin
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Geertruij Te Kronnie
- Department of Women's and Children's Health, Padua University, Padua, Italy; and
| | - Stefania Bortoluzzi
- Department of Molecular Medicine, Padua University, Padua, Italy
- Interdepartmental Research Center for Innovative Biotechnologies, Padua University, Padua, Italy
| | - Lüder Hinrich Meyer
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
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13
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Sheikh A, Md S, Kesharwani P. RGD engineered dendrimer nanotherapeutic as an emerging targeted approach in cancer therapy. J Control Release 2021; 340:221-242. [PMID: 34757195 DOI: 10.1016/j.jconrel.2021.10.028] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 10/24/2021] [Accepted: 10/28/2021] [Indexed: 12/15/2022]
Abstract
A bird's eye view is now demanded in the area of cancer research to suppress the suffering of cancer patient and mediate the lack of treatment related to chemotherapy. Chemotherapy is always preferred over surgery or radiation therapy, but they never met the patient's demand of safe medication. Targeted therapy has now been in research that could hinder the unnecessary effect of drug on normal cells but could affect the tumor cells in much efficient manner. Angiogenesis is process involved in development of new blood vessel that nourishes tumor growth. Integrin receptors are over expressed on cancer cells that play vital role in angiogenesis for growth and metastasis of tumor cell. A delivery of RGD based peptide to integrin targeted site could help in its successful binding and liberation of drug in tumor vasculature. Dendrimers, in addition to its excellent pharmacokinetic properties also helps to carry targeting ligand to site of tumor by successfully conjugating with them. The aim of this review is to bring light upon the role of integrin in cancer progression, interaction of RGD to integrin receptor and more importantly the RGD-dendrimer based targeted therapy for the treatment of various cancers.
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Affiliation(s)
- Afsana Sheikh
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Shadab Md
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Center of Excellence for Drug Research & Pharmaceutical Industries, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Prashant Kesharwani
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India.
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Transcription analysis of a histones modifiers panel coupled with critical tumor suppressor genes displayed frequent changes in patients with AML.: mRNA levels of histones modifiers and TSGs in AML. Curr Res Transl Med 2021; 69:103311. [PMID: 34455155 DOI: 10.1016/j.retram.2021.103311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 08/02/2021] [Accepted: 08/17/2021] [Indexed: 02/08/2023]
Abstract
Epigenetic alterations could cause leukemia through the activation of normally silent loci or silencing of normally active loci. We herein aimed to compare the expression patterns of a histone modifiers panel consisted of SUV39H1, PRDM16, UHRF2, KDM2B, and KDM3C between acute myeloid leukemia(AML) cells and normal cells and to assess the correlation of these genes with the expression of vital tumor suppressor genes, including p16INK4A and p53. Bone marrow or peripheral blood samples of 50 AML patients at diagnosis and also 18 subjects with a normal hematopoietic system as a control group were obtained after informed consent. Then, qRT-PCR was performed to determine the expression levels of the aforementioned genes. We found a broad alteration in the expression signature of five out of seven studied genes in AML patients as compared with the control group. UHRF2 and p53 were remarkably downregulated in AML patients (P<0.001), while SUV39H1, PRDM16, and KDM3C were significantly overexpressed (P<0.01). Based on the Spearman rank correlation, SUV39H1 and KDM2B negatively regulated both p16INK4A and p53 expression. Taken together, our findings provided preliminary evidence regarding the pervasive mRNA perturbation of histone modifiers and their plausible influences on critical tumor suppressor genes. Future studies in this area would be required to assist in establishing these results in the clinical practice of AML patients.
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15
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Metwally AM, Li H, Houghton JM. Alterations of epigenetic regulators and P53 mutations in murine mesenchymal stem cell cultures: A possible mechanism of spontaneous transformation. Cancer Biomark 2021; 32:327-337. [PMID: 34151835 DOI: 10.3233/cbm-203121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Recent studies demonstrated the involvement of mesenchymal stem/stromal cells (MSCs) in carcinogenesis, but the molecular mechanism behind this transformation is still obscured. OBJECTIVE To screen both the expression levels of polycomb and trithorax epigenetic regulators and TrP53 mutations in early and late MSC culture passages in an attempt to decipher the mechanism of spontaneous transformation. METHODS The study was conducted on early and late passages of MSC culture model from C57BL/6J mice. The expression profile of 84 epigenetic regulators was examined using RT2 profiler PCR array. TrP53 mutations in the DNA binding domain was screened. Codons, amino acids positions and the corresponding human variants were detected in P53 sequences. RESULTS Sixty-two epigenetic regulators were dysregulated. Abnormalities were detected starting the third passage. Nine regulators were dysregulated in all passages. (C>G) substitution P53 mutation was detected in passage 3 resulting in Ser152Arg substitution. Passages 6, 9, 12 and the last passage showed T>C substitution resulting in Cys235Arg substitution. The last passage had T deletion and A insertion resulting in frame shift mutations changing the p.Phe286Ser and p.Asn103Lys respectively. CONCLUSION In vitro expanded MSCs undergo transformation through alteration of epigenetic regulators which results in genomic instability and frequent P53 mutations.
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Affiliation(s)
- Ayman Mohamed Metwally
- Technology of Medical Laboratory Department, College of Applied Health Science Technology, Misr University for Science and Technology, Egypt.,Division of Gastroenterology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Hanchen Li
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Jean Marie Houghton
- Division of Gastroenterology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
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Ranjan N, Pandey V, Panigrahi MK, Klumpp L, Naumann U, Babu PP. The Tumor Suppressor MTUS1/ATIP1 Modulates Tumor Promotion in Glioma: Association with Epigenetics and DNA Repair. Cancers (Basel) 2021; 13:cancers13061245. [PMID: 33809019 PMCID: PMC7999421 DOI: 10.3390/cancers13061245] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 11/17/2022] Open
Abstract
Simple Summary Despite multidisciplinary treatments, survival remains poor in glioma patients. Although novel therapeutic approaches are being explored, no outstanding effects on the survival have been achieved so far, which substantiates the need to develop new therapeutic strategies. To understand the mechanisms responsible for its high malignancy and obligatory recurrence, we examined the impact of MTUS1, a tumor-suppressor gene (TSG), coding for ATIP1, in glioma malignancy as well as how its expression might influence glioma therapy. We confirmed that in glioma cells, elevated ATIP1 expression damps tumor progression by mitigating proliferation and motility. Additionally, MTUS1/ATIP1 can be used as a biological marker to predict therapy outcomes. In glioma cell lines, glioma sphere cultures (GSC), high-grade glioma (HGG) and especially in glioma recurrence, MTUS1/ATIP1 expression is downregulated, probably by promoter hypermethylation. However, in GBM, high ATIP1 expression might interfere with radiation-therapy since elevated expression of MTUS1/ATIP1 drives double-strand break (DSB) DNA repair. Abstract Glioblastoma (GBM) is a highly aggressive brain tumor. Resistance mechanisms in GBM present an array of challenges to understand its biology and to develop novel therapeutic strategies. We investigated the role of a TSG, MTUS1/ATIP1 in glioma. Glioma specimen, cells and low passage GBM sphere cultures (GSC) were analyzed for MTUS1/ATIP1 expression at the RNA and protein level. Methylation analyses were done by bisulfite sequencing (BSS). The consequence of chemotherapy and irradiation on ATIP1 expression and the influence of different cellular ATIP1 levels on survival was examined in vitro and in vivo. MTUS1/ATIP1 was downregulated in high-grade glioma (HGG), GSC and GBM cells and hypermethylation at the ATIP1 promoter region seems to be at least partially responsible for this downregulation. ATIP1 overexpression significantly reduced glioma progression by mitigating cell motility, proliferation and facilitate cell death. In glioma-bearing mice, elevated MTUS1/ATIP1 expression prolonged their survival. Chemotherapy, as well as irradiation, recovered ATIP1 expression both in vitro and in vivo. Surprisingly, ATIP1 overexpression increased irradiation-induced DNA-damage repair, resulting in radio-resistance. Our findings indicate that MTUS1/ATIP1 serves as TSG-regulating gliomagenesis, progression and therapy resistance. In HGG, higher MTUS1/ATIP1 expression might interfere with tumor irradiation therapy.
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Affiliation(s)
- Nikhil Ranjan
- Laboratory of Neuroscience, Department of Biotechnology & Bioinformatics, School of Life Sciences, University of Hyderabad, Telangana 500046, India
- Laboratory of Molecular Neuro-Oncology, Department of General Neurology, Hertie-Institute for Clinical Brain Research and Center Neurology, University of Tuebingen, Otfried-Mueller-Str. 27, 72076 Tuebingen, Germany
| | - Vimal Pandey
- Laboratory of Neuroscience, Department of Biotechnology & Bioinformatics, School of Life Sciences, University of Hyderabad, Telangana 500046, India
| | - Manas Kumar Panigrahi
- Department of Neurosurgery and Pathology, Krishna Institute of Medical Sciences (KIMS), Secunderabad, Telangana 500003, India
| | - Lukas Klumpp
- Department of Radiation Oncology, University Hospital Tübingen, 72076 Tübingen, Germany
| | - Ulrike Naumann
- Laboratory of Molecular Neuro-Oncology, Department of General Neurology, Hertie-Institute for Clinical Brain Research and Center Neurology, University of Tuebingen, Otfried-Mueller-Str. 27, 72076 Tuebingen, Germany
| | - Phanithi Prakash Babu
- Laboratory of Neuroscience, Department of Biotechnology & Bioinformatics, School of Life Sciences, University of Hyderabad, Telangana 500046, India
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Pandit S, Wasekar N, Badarkhe G, Yasam VR, Nagarkar R. Acute lymphoblastic leukemia to acute myeloid leukemia: an unusual case report of lineage switching. Hematol Transfus Cell Ther 2020; 44:112-115. [PMID: 32737020 PMCID: PMC8885375 DOI: 10.1016/j.htct.2020.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/23/2020] [Accepted: 06/08/2020] [Indexed: 12/05/2022] Open
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18
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Drokow EK, Chen Y, Waqas Ahmed HA, Oppong TB, Akpabla GS, Pei Y, Kumah MA, Neku EA, Sun K. The relationship between leukemia and TP53 gene codon Arg72Pro polymorphism: analysis in a multi-ethnic population. Future Oncol 2020; 16:923-937. [PMID: 32301350 DOI: 10.2217/fon-2019-0792] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Many studies have analyzed the relationship between Arg72Pro polymorphism of TP53 and leukemia; nevertheless, the findings continue to be indeterminate. We, therefore, performed an updated meta-analysis in multi-ethnic groups using specialized software for genome-wide association studies meta-analysis. Materials & methods: PubMed, EMBASE and Google Scholar were searched up to October 2018. An odds ratio (OR) with the corresponding 95% CI was used to evaluate the strength in the association. Results: This meta-analysis included 16 studies with 2337 cases and 9494 controls. In the overall population, significant relationship between Arg72Pro polymorphism of TP53 and leukemia susceptibility was found in two genetic models (recessive model: OR = 1.276, 95% CI = 1.102-1.476; p = 0.01; overdominant model: OR = 0.891, 95% CI = 0.802-0.988; p = 0.03). In stratified studies with ethnicity, a significant association was found in five ethnic groups, including Chinese, Americans, Africans, Japanese and Indians. Conclusion: We demonstrated that an association exist between leukemia risk and TP53 gene codon Arg72Pro polymorphism in the recessive and overdominant genetic models. Also, our findings show that the TP53 Arg72Pro polymorphism may influence leukemia development in different populations.
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Affiliation(s)
- Emmanuel Kwateng Drokow
- Department of Radiation Oncology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003 Zhengzhou, PR China
| | - Yuqing Chen
- Department of Haematology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003 Zhengzhou, PR China
| | - Hafiz Abdul Waqas Ahmed
- Department of Haematology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003 Zhengzhou, PR China
| | - Timothy Bonney Oppong
- Department of Epidemiology & Biostatistics, College of Public Health, Zhengzhou University, 450001 Zhengzhou, Henan, PR China
| | - Gloria Selorm Akpabla
- Department of Internal Medicine, Tianjin Medical University, 300070 Tianjin, PR China
| | - Yanru Pei
- Department of Haematology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003 Zhengzhou, PR China
| | - Maame Awoyoe Kumah
- Department of Internal Medicine, University of Ghana Medical School, KB 77 Korle Bu, Accra, Ghana
| | - Enyonam Adjoa Neku
- Department of Pharmacy, Zhengzhou University, 450001 Zhengzhou, Henan, PR China
| | - Kai Sun
- Department of Haematology, Zhengzhou University People's Hospital & Henan Provincial People's Hospital Henan, 450003 Zhengzhou, PR China
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Mazumder TH, Uddin A, Chakraborty S. Insights into the nucleotide composition and codon usage pattern of human tumor suppressor genes. Mol Carcinog 2019; 59:15-23. [PMID: 31583785 DOI: 10.1002/mc.23124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 09/05/2019] [Accepted: 09/21/2019] [Indexed: 01/21/2023]
Abstract
Tumor suppressor genes encode different proteins that inhibit the uncontrolled proliferation of cell growth and tumor development. To acquire clues for predicting gene expression level, it is essential to understand the codon usage bias (CUB) of genes to characterize genome which possesses its own compositional characteristics and unique coding sequences. We used bioinformatic tools to analyze the codon usage patterns of 637 human tumor suppressor genes as no work was reported earlier. The mean effective number of codons of these genes was 48, indicating low CUB. Our results exhibited a significant positive correlation among different nucleotide compositions and the codons ending with C base was most frequently used along with the most over-represented codon CTG and GTG codifying leucine and valine amino acid, respectively, in human tumor suppressor genes. The neutrality plot showed a significant positive correlation (Pearson, r = 0. 646; P < .01) suggesting that mutation on GC bias might affect the CUB. However, the linear regression coefficient of GC12 on GC3 in human tumor suppressor genes suggested that natural selection played a major role while mutation pressure played a minor role in the codon usage patterns of tumor suppressor genes in human. Our study would throw light into the factors that affect CUB and the codon usage patterns in the human tumor suppressor genes.
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Affiliation(s)
| | - Arif Uddin
- Department of Zoology, Moinul Hoque Choudhury Memorial Science College, Hailakandi, Assam, India
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20
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Chemistry and pharmacological diversity of quinoxaline motifs as anticancer agents. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2019; 69:177-196. [PMID: 31259731 DOI: 10.2478/acph-2019-0013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/26/2018] [Indexed: 01/19/2023]
Abstract
Surpassing heart diseases, cancer is taking the lead as the deadliest disease because of its fast rate of spreading in all parts of the world. Tireless commitment to searching for novel therapeutic medicines is a worthwhile adventure in synthetic chemistry because of the drug resistance predicament and regular outbreak of new diseases due to abnormal cell growth and proliferation. Medicinal chemistry researchers and pharmacists have unveiled quinoxaline templates as precursors of importance and valuable intermediates in drug discovery because they have been established to possess diverse pharmacological potentials. Hence, this review highlights the current versatile routes to accessing functionalized quinoxaline motifs and harnessing their documented therapeutic potentials for anticancer drug development.
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21
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Li X, Wu L, Zopp M, Kopelov S, Du W. p53-TP53-Induced Glycolysis Regulator Mediated Glycolytic Suppression Attenuates DNA Damage and Genomic Instability in Fanconi Anemia Hematopoietic Stem Cells. Stem Cells 2019; 37:937-947. [PMID: 30977208 PMCID: PMC6599562 DOI: 10.1002/stem.3015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/24/2019] [Accepted: 03/31/2019] [Indexed: 01/31/2023]
Abstract
Emerging evidence has shown that resting quiescent hematopoietic stem cells (HSCs) prefer to utilize anaerobic glycolysis rather than mitochondrial respiration for energy production. Compelling evidence has also revealed that altered metabolic energetics in HSCs underlies the onset of certain blood diseases; however, the mechanisms responsible for energetic reprogramming remain elusive. We recently found that Fanconi anemia (FA) HSCs in their resting state are more dependent on mitochondrial respiration for energy metabolism than on glycolysis. In the present study, we investigated the role of deficient glycolysis in FA HSC maintenance. We observed significantly reduced glucose consumption, lactate production, and ATP production in HSCs but not in the less primitive multipotent progenitors or restricted hematopoietic progenitors of Fanca−/− and Fancc−/− mice compared with that of wild‐type mice, which was associated with an overactivated p53 and TP53‐induced glycolysis regulator, the TIGAR‐mediated metabolic axis. We utilized Fanca−/− HSCs deficient for p53 to show that the p53‐TIGAR axis suppressed glycolysis in FA HSCs, leading to enhanced pentose phosphate pathway and cellular antioxidant function and, consequently, reduced DNA damage and attenuated HSC exhaustion. Furthermore, by using Fanca−/− HSCs carrying the separation‐of‐function mutant p53R172P transgene that selectively impairs the p53 function in apoptosis but not cell‐cycle control, we demonstrated that the cell‐cycle function of p53 was not required for glycolytic suppression in FA HSCs. Finally, ectopic expression of the glycolytic rate‐limiting enzyme PFKFB3 specifically antagonized p53‐TIGAR‐mediated metabolic reprogramming in FA HSCs. Together, our results suggest that p53‐TIGAR metabolic axis‐mediated glycolytic suppression may play a compensatory role in attenuating DNA damage and proliferative exhaustion in FA HSCs. stem cells2019;37:937–947
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Affiliation(s)
- Xue Li
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA.,Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou, People's Republic of China
| | - Limei Wu
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA
| | - Morgan Zopp
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA
| | - Shaina Kopelov
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA
| | - Wei Du
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA.,Alexander B. Osborn Hematopoietic Malignancy and Transplantation Program, West Virginia University Cancer Institute, Morgantown, West Virginia, USA
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22
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Mizuno Y, Chinen Y, Tsukamoto T, Takimoto-Shimomura T, Matsumura-Kimoto Y, Fujibayashi Y, Kuwahara-Ota S, Fujino T, Nishiyama D, Shimura Y, Kobayashi T, Horiike S, Taniwaki M, Kuroda J. A novel method of amplified fluorescent in situ hybridization for detection of chromosomal microdeletions in B cell lymphoma. Int J Hematol 2019; 109:593-602. [PMID: 30830578 DOI: 10.1007/s12185-019-02617-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 02/09/2019] [Accepted: 02/12/2019] [Indexed: 12/11/2022]
Abstract
Chromosomal microdeletions frequently cause loss of prognostically relevant tumor suppressor genes in hematologic malignancies; however, detection of minute deletions by conventional methods for chromosomal analysis, such as G-banding and fluorescence in situ hybridization (FISH), is difficult due to their low resolution. Here, we describe a new diagnostic modality that enables detection of chromosomal microdeletions, using CDKN2A gene deletion in B cell lymphomas (BCLs) as an example. In this method, which we refer to as amplified-FISH (AM-FISH), a 31-kb fluorescein isothiocyanate (FITC)-conjugated DNA probe encoding only CDKN2A was first hybridized with the chromosome, and then labeled with Alexa Fluor 488-conjugated anti-FITC secondary antibody to increase sensitivity. CDKN2A signals were equally identifiable by AM-FISH and conventional FISH in normal mononuclear blood cells. In contrast, when two BCL cell lines lacking CDKN2A were analyzed, CDKN2A signals were not detected by AM-FISH, whereas conventional FISH yielded false signals. Furthermore, AM-FISH detected CDKN2A deletions in two BCL patients with 9p21 microdeletions, which were not detected by conventional FISH. These results suggest that AM-FISH is a highly sensitive, specific, and simple method for diagnosis of chromosomal microdeletions.
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Affiliation(s)
- Yoshimi Mizuno
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Yoshiaki Chinen
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan.
| | - Taku Tsukamoto
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Tomoko Takimoto-Shimomura
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Yayoi Matsumura-Kimoto
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Yuto Fujibayashi
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Saeko Kuwahara-Ota
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Takahiro Fujino
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Daichi Nishiyama
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Yuji Shimura
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Tsutomu Kobayashi
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Shigeo Horiike
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Masafumi Taniwaki
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Junya Kuroda
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
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23
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Zhu B, Zhu Y, Tian J, Shen N, Li J, Lou J, Ke J, Yang Y, Gong Y, Gong J, Chang J, Miao X, Zhong R. A functional variant rs1537373 in 9p21.3 region is associated with pancreatic cancer risk. Mol Carcinog 2019; 58:760-766. [PMID: 30604909 DOI: 10.1002/mc.22968] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 12/12/2018] [Accepted: 12/27/2018] [Indexed: 12/18/2022]
Abstract
9p21.3 has been identified as an unexpected hot point in multiple diseases GWAS including cancers, and we performed a two-stage case-control studies integrating functional assay strategy to find the potential functional variants modified susceptibility to pancreatic cancer (PC). An expanded Illumina HumanExome Beadchip of PC including 943 cases and 3908 controls was used to examine 39 tagSNPs in 9p21.3 and the promising single nucleotide polymorphism (SNP) was validated in stage 2 comprising 624 cases and 1048 controls. The strongest signal was rs6475609 (Odds ratio, OR = 0.81, 95% confidence interval, CI = 0.72-0.91) maps to the long non-coding RNA ANRIL. Bioinformatics analysis revealed rs1537373 lies in the linkage disequilibrium (LD) block which the rs6475609 tagged might have potential function and was also associated with a decreased risk of PC in both stages (OR = 0.82, 95% CI = 0.75-0.90 in combined analysis). Dual luciferase reporter assay and the electrophoretic mobility shift assay (EMSA) verified rs1537373 as the best candidate causative variant for influencing the activity of enhancer through differential binding to certain transcription factor. The expression quantitative trait loci (e-QTL) analysis indicated the genotypes of rs1537373 were associated with expression of CDKN2B gene (P dominant = 6.00 × 10-4 ). In conclusion, our study provided evidence that rs1537373 in ANRIL may influence transcription factor binding and regulate CDKN2B expression, thus confer the susceptibility to PC.
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Affiliation(s)
- Beibei Zhu
- Department of Maternal, Child and Adolescent Health, Anhui Medical University, Hefei, China.,Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ying Zhu
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jianbo Tian
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Na Shen
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jiaoyuan Li
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jiao Lou
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Juntao Ke
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yang Yang
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yajie Gong
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jing Gong
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jiang Chang
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Xiaoping Miao
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Rong Zhong
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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24
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VENTURI V, MASEK T, POSPISEK M. A Blood Pact: the Significance and Implications of eIF4E on Lymphocytic Leukemia. Physiol Res 2018. [DOI: 10.33549/physiolres.933696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Elevated levels of eukaryotic initiation factor 4E (eIF4E) are implicated in neoplasia, with cumulative evidence pointing to its role in the etiopathogenesis of hematological diseases. As a node of convergence for several oncogenic signaling pathways, eIF4E has attracted a great deal of interest from biologists and clinicians whose efforts have been targeting this translation factor and its biological circuits in the battle against leukemia. The role of eIF4E in myeloid leukemia has been ascertained and drugs targeting its functions have found their place in clinical trials. Little is known, however, about the pertinence of eIF4E to the biology of lymphocytic leukemia and a paucity of literature is available in this regard that prospectively evaluates the topic to guide practice in hematological cancer. A comprehensive analysis on the significance of eIF4E translation factor in the clinical picture of leukemia arises, therefore, as a compelling need. This review presents aspects of eIF4E involvement in the realm of the lymphoblastic leukemia status; translational control of immunological function via eIF4E and the state-of-the-art in drugs will also be outlined.
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Affiliation(s)
| | | | - M. POSPISEK
- Department of Genetics and Microbiology, Faculty of Science, Charles University, Prague, Czech Republic
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25
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Pfeifer GP. Defining Driver DNA Methylation Changes in Human Cancer. Int J Mol Sci 2018; 19:ijms19041166. [PMID: 29649096 PMCID: PMC5979276 DOI: 10.3390/ijms19041166] [Citation(s) in RCA: 200] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 04/09/2018] [Accepted: 04/10/2018] [Indexed: 12/11/2022] Open
Abstract
Human malignant tumors are characterized by pervasive changes in the patterns of DNA methylation. These changes include a globally hypomethylated tumor cell genome and the focal hypermethylation of numerous 5′-cytosine-phosphate-guanine-3′ (CpG) islands, many of them associated with gene promoters. It has been challenging to link specific DNA methylation changes with tumorigenesis in a cause-and-effect relationship. Some evidence suggests that cancer-associated DNA hypomethylation may increase genomic instability. Promoter hypermethylation events can lead to silencing of genes functioning in pathways reflecting hallmarks of cancer, including DNA repair, cell cycle regulation, promotion of apoptosis or control of key tumor-relevant signaling networks. A convincing argument for a tumor-driving role of DNA methylation can be made when the same genes are also frequently mutated in cancer. Many of the most commonly hypermethylated genes encode developmental transcription factors, the methylation of which may lead to permanent gene silencing. Inactivation of such genes will deprive the cells in which the tumor may initiate from the option of undergoing or maintaining lineage differentiation and will lock them into a perpetuated stem cell-like state thus providing an additional window for cell transformation.
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Affiliation(s)
- Gerd P Pfeifer
- Center for Epigenetics, Van Andel Research Institute, 333 Bostwick Avenue NE, Grand Rapids, MI 49503, USA.
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26
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Arora N, Gavya S L, Ghosh SS. Multi-facet implications of PEGylated lysozyme stabilized-silver nanoclusters loaded recombinant PTEN cargo in cancer theranostics. Biotechnol Bioeng 2018; 115:1116-1127. [PMID: 29384195 DOI: 10.1002/bit.26553] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 01/14/2018] [Accepted: 01/22/2018] [Indexed: 12/17/2022]
Abstract
Amalgamation of delivery and tracking of therapeutically relevant moieties on a single platform is made possible by the application of metal nanoclusters, an innovative class of luminescent nanomaterials. Metal nanoclusters, possessing molecule-like attributes, display extraordinary size and shape tunable properties befitting theranostic applications. Herein, we report successful assembly of therapeutically significant phosphatase protein PTEN and fluorescent lysozyme-stabilized silver nanoclusters to accomplish delivery and tracking of the protein. Down-regulation of PTEN perturbs the cellular networking leading to copious pathological conditions. The integration of purified recombinant PTEN with silver nanoclusters was evaluated by fluorescence spectroscopy study. A key feature of this study is the use of polyethylene glycol coating that allows fabrication of the assembly into spherical nanocomposites as characterized by transmission electron microscope along with retention of both optical functionality of the cluster and biological activity of the protein. Prior to cellular application, the functional integrity of PTEN in the composite was determined in vitro, by enzymatic assay employing para-nitrophenylphosphate as substrate. Cellular internalization of the cargo was studied by confocal microscopy and flow cytometry analysis. The efficacy of the payload on modulation of cellular signaling was assessed on cell lines that expressed PTEN differentially. PTEN null U-87 MG and PTEN expressing MCF7 cell lines displayed successful alteration of AKT and FAK signaling proteins culminating in cell cycle arrest and reduced wound healing capacity. A dose dependent reduction in cell proliferation of MCF7 cells was achieved. For U-87 MG, treatment with the payload resulted in chemosensitization toward anti-cancer drug erlotinib. Thus, PEG coated GST-PTEN loaded silver nanoclusters serves as a comprehensive system encompassing cellular imaging and protein delivery with potential biomedical implications.
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Affiliation(s)
- Neha Arora
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Lalitha Gavya S
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Siddhartha S Ghosh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India.,Center for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam, India
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27
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Zjablovskaja P, Danek P, Kardosova M, Alberich-Jorda M. Proliferation and Differentiation of Murine Myeloid Precursor 32D/G-CSF-R Cells. J Vis Exp 2018. [PMID: 29553501 DOI: 10.3791/57033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Understanding of the hematopoietic stem and progenitor cell biology has important implications for regenerative medicine and the treatment of hematological pathologies. Despite the most relevant data that can be acquired using in vivo models or primary cultures, the low abundance of hematopoietic stem and progenitor cells considerably restricts the pool of suitable techniques for their investigation. Therefore, the use of cell lines allows sufficient production of biological material for the performance of screenings or assays that require large cell numbers. Here we present a detailed description, readout, and interpretation of proliferation and differentiation assays which are used for the investigation of processes involved in myelopoiesis and neutrophilic differentiation. These experiments employ the 32D/G-CSF-R cytokine dependent murine myeloid cell line, which possesses the ability to proliferate in the presence of IL-3 and differentiate in G-CSF. We provide optimized protocols for handling 32D/G-CSF-R cells and discuss major pitfalls and drawbacks that might compromise the described assays and expected results. Additionally, this article contains protocols for lentiviral and retroviral production, titration, and transduction of 32D/G-CSF-R cells. We demonstrate that genetic manipulation of these cells can be employed to successfully perform functional and molecular studies, which can complement results obtained with primary hematopoietic stem and progenitor cells or in vivo models.
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Affiliation(s)
- Polina Zjablovskaja
- Department of Hemato-Oncology, Institute of Molecular Genetics of the ASCR; Childhood Leukaemia Investigation Prague, Department of Paediatric Haematology and Oncology, 2nd Faculty of Medicine, Charles University
| | - Petr Danek
- Department of Hemato-Oncology, Institute of Molecular Genetics of the ASCR
| | | | - Meritxell Alberich-Jorda
- Department of Hemato-Oncology, Institute of Molecular Genetics of the ASCR; Childhood Leukaemia Investigation Prague, Department of Paediatric Haematology and Oncology, 2nd Faculty of Medicine, Charles University;
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28
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Li X, Wilson AF, Du W, Pang Q. Cell-Cycle-Specific Function of p53 in Fanconi Anemia Hematopoietic Stem and Progenitor Cell Proliferation. Stem Cell Reports 2018; 10:339-346. [PMID: 29307578 PMCID: PMC5830889 DOI: 10.1016/j.stemcr.2017.12.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 12/04/2017] [Accepted: 12/05/2017] [Indexed: 12/18/2022] Open
Abstract
Overactive p53 has been proposed as an important pathophysiological factor for bone marrow failure syndromes, including Fanconi anemia (FA). Here, we report a p53-dependent effect on hematopoietic stem and progenitor cell (HSPC) proliferation in mice deficient for the FA gene Fanca. Deletion of p53 in Fanca-/- mice leads to replicative exhaustion of the hematopoietic stem cell (HSC) in transplant recipients. Using Fanca-/- HSCs expressing the separation-of-function mutant p53515C transgene, which selectively impairs the p53 function in apoptosis but keeps its cell-cycle checkpoint activities intact, we show that the p53 cell-cycle function is specifically required for the regulation of Fanca-/- HSC proliferation. Our results demonstrate that p53 plays a compensatory role in preventing FA HSCs from replicative exhaustion and suggest a cautious approach to manipulating p53 signaling as a therapeutic utility in FA.
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Affiliation(s)
- Xiaoli Li
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH 45229, USA
| | - Andrew F Wilson
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH 45229, USA
| | - Wei Du
- Department of Pharmaceutical Sciences, West Virginia University School of Pharmacy, Morgantown, WV 26506, USA.
| | - Qishen Pang
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH 45229, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA.
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29
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Tang X, Zhou J, Zhang J, Zhou LY, Zhai LL, Vanessa MED, Yi J, Yi YY, Lin J, Deng ZQ. Low Expression of FUS1 Is Negatively Correlated with miR-378 and May Predict Adverse Prognoses in Acute Myeloid Leukemia. Acta Haematol 2018; 139:89-95. [PMID: 29393096 DOI: 10.1159/000486663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 12/23/2017] [Indexed: 12/28/2022]
Abstract
FUS1 is a tumor suppressor gene that has been found to be frequently lost in a variety of solid tumors. In this study, we aimed to investigate the expression status of the FUS1 gene in acute myeloid leukemia (AML), as well as its clinical significance. We further explored the correlation between the expression of FUS1 and miR-378 in AML. We detected expression of the FUS1 transcript in bone marrow mononuclear cells from 23 controls and 158 newly diagnosed AML patients by real-time quantitative polymerase chain reaction. Downregulated FUS1 expression was found in 139 out of 158 (87.97%) AML cases; this rate was significantly lower than that in all 23 controls (p = 0.012). Receiver operating characteristic curve analysis revealed that the FUS1 transcript level could discriminate AML patients from controls effectively (area under the ROC curve = 0.663). Kaplan-Meier analysis demonstrated that non-M3-AML patients with a low FUS1 expression had a shorter overall survival (p = 0.049) and leukemia-free survival (p = 0.051) than those with a high FUS1 expression. Furthermore, we studied the correlation between the expression of FUS1 and miR-378 in 53 newly diagnosed AML patients. We found that the correlation coefficient was -0.346, which showed that FUS1 and miR-378 were negatively correlated in AML patients (p = 0.011). These results indicate that the low expression of FUS1 is a common molecular event in AML.
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Affiliation(s)
- Xi Tang
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
- Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - Jiao Zhou
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
- Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - Jing Zhang
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
- Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - Ling-Yu Zhou
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
- Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - Ling-Ling Zhai
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
- Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - Minse Evola-Deniz Vanessa
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
- Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - Jing Yi
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
- Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - Yun-Yun Yi
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
- Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - Jiang Lin
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - Zhao-Qun Deng
- Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
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30
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Zhang J, Zhou J, Tang X, Zhou LY, Zhai LL, Vanessa MED, Yi J, Yi YY, Lin J, Qian J, Deng ZQ. Reduced expression of chemerin is associated with poor clinical outcome in acute myeloid leukemia. Oncotarget 2017; 8:92536-92544. [PMID: 29190935 PMCID: PMC5696201 DOI: 10.18632/oncotarget.21440] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 08/29/2017] [Indexed: 12/22/2022] Open
Abstract
Chemerin is dysregulation in numerous solid cancers. However, only little is known about the role of chemerin in acute myeloid leukemia (AML). In this study, we aimed to investigate the expression and clinical significance of recently described chemerin in acute myeloid leukemia (AML). The expression of chemerin in 149 patients with de novo AML and 35 normal controls was quantified by Real-time quantitative PCR (RQ-PCR). Chemerin was down-expressed in AML compared with controls (P=0.042). A receiver operating characteristic (ROC) curve revealed that chemerin expression could differentiate patients with AML from control subjects (AUC=0.611, 95% CI: 0.490-0.732; P=0.042) respectively. The cohort of AML patients was divided into two groups according to the cut-off value of 0.0826 (79% sensitivity and 54% specificity, respectively). In addition, the AML patients with low chemerin expression had significantly shorter overall survival (OS) than those with high chemerin expression (P=0.049). Moreover, multivariate survival analysis confirmed that chemerin was an independent prognostic factor for AML patients. In conclusion, downregulation of chemerin might be a useful diagnostic and prognostic factor for AML patients.
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Affiliation(s)
- Jing Zhang
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China.,Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Jiao Zhou
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China.,Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Xi Tang
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China.,Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Ling-Yu Zhou
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China.,Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Ling-Ling Zhai
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China.,Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Minse Evola-Deniz Vanessa
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Jing Yi
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China.,Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Yun-Yun Yi
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China.,Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Jiang Lin
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Jun Qian
- Department of Hematology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
| | - Zhao-Qun Deng
- Department of Laboratory Center, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, Jiangsu, People's Republic of China
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31
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Salarpour F, Goudarzipour K, Mohammadi MH, Ahmadzadeh A, Faraahi S, Farsani MA. Evaluation of CCAAT/Enhancer Binding Protein (C/EBP) Alpha (CEBPA) and Runt-Related Transcription Factor 1 (RUNX1) Expression in Patients with De Novo Acute Myeloid Leukemia. Ann Hum Genet 2017; 81:276-283. [DOI: 10.1111/ahg.12210] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 07/20/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Fatemeh Salarpour
- Laboratory Hematology and blood Banking Department; School of Allied Medical Sciences; Shahid Beheshti University of Medical Science; Tehran Iran
| | - Kourosh Goudarzipour
- Pediatric Congenital Hematologic Disorders Research Center; Shahid Beheshti University of Medical Science; Tehran Iran
| | - Mohammad Hossein Mohammadi
- Laboratory Hematology and Blood Bank Department; Faculty of Paramedical; Shahid Beheshti University of Medical Sciences
- HSCT Research Center; Shahid Beheshti University of Medical Sciences; Tehran
| | - Ahmad Ahmadzadeh
- Health Research Institute; Research Center of Thalassemia & Hemoglobinopathy; Ahvaz jundishapur University of Medical Science; Ahvaz Iran
| | - Sara Faraahi
- Laboratory Hematology and blood Banking Department; School of Allied Medical Sciences; Shahid Beheshti University of Medical Science; Tehran Iran
| | - Mehdi Allahbakhshian Farsani
- Laboratory Hematology and Blood Bank Department; Faculty of Paramedical; Shahid Beheshti University of Medical Sciences
- HSCT Research Center; Shahid Beheshti University of Medical Sciences; Tehran
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32
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Zhu YM, Wang PP, Huang JY, Chen YS, Chen B, Dai YJ, Yan H, Hu Y, Cheng WY, Ma TT, Chen SJ, Shen Y. Gene mutational pattern and expression level in 560 acute myeloid leukemia patients and their clinical relevance. J Transl Med 2017; 15:178. [PMID: 28830460 PMCID: PMC5568401 DOI: 10.1186/s12967-017-1279-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 08/09/2017] [Indexed: 12/13/2022] Open
Abstract
Background Cytogenetic aberrations and gene mutations have long been regarded as independent prognostic markers in AML, both of which can lead to misexpression of some key genes related to hematopoiesis. It is believed that the expression level of the key genes is associated with the treatment outcome of AML. Methods In this study, we analyzed the clinical features and molecular aberrations of 560 newly diagnosed non-M3 AML patients, including mutational status of CEBPA, NPM1, FLT3, C-KIT, NRAS, WT1, DNMT3A, MLL-PTD and IDH1/2, as well as expression levels of MECOM, ERG, GATA2, WT1, BAALC, MEIS1 and SPI1. Results Certain gene expression levels were associated with the cytogenetic aberration of the disease, especially for MECOM, MEIS1 and BAALC. FLT3, C-KIT and NRAS mutations contained conversed expression profile regarding MEIS1, WT1, GATA2 and BAALC expression, respectively. FLT3, DNMT3A, NPM1 and biallelic CEBPA represented the mutations associated with the prognosis of AML in our group. Higher MECOM and MEIS1 gene expression levels showed a significant impact on complete remission (CR) rate, disease free survival (DFS) and overall survival (OS) both in univariate and multivariate analysis, respectively; and an additive effect could be observed. By systematically integrating gene mutational status results and gene expression profile, we could establish a more refined system to precisely subdivide AML patients into distinct prognostic groups. Conclusions Gene expression abnormalities contained important biological and clinical informations, and could be integrated into current AML stratification system. Electronic supplementary material The online version of this article (doi:10.1186/s12967-017-1279-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yong-Mei Zhu
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Pan-Pan Wang
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Jin-Yan Huang
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Yun-Shuo Chen
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Bing Chen
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Yu-Jun Dai
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Han Yan
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Yi Hu
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Wen-Yan Cheng
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Ting-Ting Ma
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China
| | - Sai-Juan Chen
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China.
| | - Yang Shen
- Department of Hematology, Shanghai Institute of Hematology, RuiJin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 197 RuiJin Road II, Shanghai, 200025, China.
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Al-Absi B, Razif MFM, Noor SM, Saif-Ali R, Aqlan M, Salem SD, Ahmed RH, Muniandy S. Contributions of IKZF1, DDC, CDKN2A, CEBPE, and LMO1 Gene Polymorphisms to Acute Lymphoblastic Leukemia in a Yemeni Population. Genet Test Mol Biomarkers 2017; 21:592-599. [PMID: 28768142 DOI: 10.1089/gtmb.2017.0084] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Genome-wide and candidate gene association studies have previously revealed links between a predisposition to acute lymphoblastic leukemia (ALL) and genetic polymorphisms in the following genes: IKZF1 (7p12.2; ID: 10320), DDC (7p12.2; ID: 1644), CDKN2A (9p21.3; ID: 1029), CEBPE (14q11.2; ID: 1053), and LMO1 (11p15; ID: 4004). In this study, we aimed to conduct an investigation into the possible association between polymorphisms in these genes and ALL within a sample of Yemeni children of Arab-Asian descent. METHODS Seven single-nucleotide polymorphisms (SNPs) in IKZF1, three SNPs in DDC, two SNPs in CDKN2A, two SNPs in CEBPE, and three SNPs in LMO1 were genotyped in 289 Yemeni children (136 cases and 153 controls), using the nanofluidic Dynamic Array (Fluidigm 192.24 Dynamic Array). Logistic regression analyses were used to estimate ALL risk, and the strength of association was expressed as odds ratios with 95% confidence intervals. RESULTS We found that the IKZF1 SNP rs10235796 C allele (p = 0.002), the IKZF1 rs6964969 A>G polymorphism (p = 0.048, GG vs. AA), the CDKN2A rs3731246 G>C polymorphism (p = 0.047, GC+CC vs. GG), and the CDKN2A SNP rs3731246 C allele (p = 0.007) were significantly associated with ALL in Yemenis of Arab-Asian descent. In addition, a borderline association was found between IKZF1 rs4132601 T>G variant and ALL risk. No associations were found between the IKZF1 SNPs (rs11978267; rs7789635), DDC SNPs (rs3779084; rs880028; rs7809758), CDKN2A SNP (rs3731217), the CEBPE SNPs (rs2239633; rs12434881) and LMO1 SNPs (rs442264; rs3794012; rs4237770) with ALL in Yemeni children. CONCLUSION The IKZF1 SNPs, rs10235796 and rs6964969, and the CDKN2A SNP rs3731246 (previously unreported) could serve as risk markers for ALL susceptibility in Yemeni children.
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Affiliation(s)
- Boshra Al-Absi
- 1 Department of Molecular Medicine, University of Malaya , Kuala Lumpur, Malaysia
| | - Muhammad F M Razif
- 1 Department of Molecular Medicine, University of Malaya , Kuala Lumpur, Malaysia
| | - Suzita M Noor
- 2 Department of Biomedical Science, Faculty of Medicine, University of Malaya , Kuala Lumpur, Malaysia
| | - Riyadh Saif-Ali
- 3 Department of Biochemistry and Molecular Biology, Faculty of Medicine, Sana'a University , Sana'a, Yemen
| | - Mohammed Aqlan
- 4 Department of Pediatrics, Al-Kuwait University Hospital , Sana'a, Yemen
| | - Sameer D Salem
- 3 Department of Biochemistry and Molecular Biology, Faculty of Medicine, Sana'a University , Sana'a, Yemen
| | - Radwan H Ahmed
- 1 Department of Molecular Medicine, University of Malaya , Kuala Lumpur, Malaysia
| | - Sekaran Muniandy
- 5 Department of Biochemistry, Faculty of Medicine, MAHSA University , Kuala Lumpur, Malaysia
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Abramowitz J, Neuman T, Perlman R, Ben-Yehuda D. Gene and protein analysis reveals that p53 pathway is functionally inactivated in cytogenetically normal Acute Myeloid Leukemia and Acute Promyelocytic Leukemia. BMC Med Genomics 2017; 10:18. [PMID: 28340577 PMCID: PMC5423421 DOI: 10.1186/s12920-017-0249-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 03/03/2017] [Indexed: 12/11/2022] Open
Abstract
Background Mechanisms that inactivate the p53 pathway in Acute Myeloid Leukemia (AML), other than rare mutations, are still not well understood. Methods We performed a bioinformatics study of the p53 pathway function at the gene expression level on our collection of 1153 p53-pathway related genes. Publically available Affymetrix data of 607 de-novo AML patients at diagnosis were analyzed according to the patients cytogenetic, FAB and molecular mutations subtypes. We further investigated the functional status of the p53 pathway in cytogenetically normal AML (CN-AML) and Acute Promyelocytic Leukemia (APL) patients using bioinformatics, Real-Time PCR and immunohistochemistry. Results We revealed significant and differential alterations of p53 pathway-related gene expression in most of the AML subtypes. We found that p53 pathway-related gene expression was not correlated with the accepted grouping of AML subtypes such as by cytogenetically-based prognosis, morphological stage or by the type of molecular mutation. Our bioinformatic analysis revealed that p53 is not functional in CN-AML and APL blasts at inducing its most important functional outcomes: cell cycle arrest, apoptosis, DNA repair and oxidative stress defense. We revealed transcriptional downregulation of important p53 acetyltransferases in both CN-AML and APL, accompanied by increased Mdmx protein expression and inadequate Chk2 protein activation. Conclusions Our bioinformatic analysis demonstrated that p53 pathway is differentially inactivated in different AML subtypes. Focused gene and protein analysis of p53 pathway in CN-AML and APL patients imply that functional inactivation of p53 protein can be attributed to its impaired acetylation. Our analysis indicates the need in further accurate evaluation of p53 pathway functioning and regulation in distinct subtypes of AML. Electronic supplementary material The online version of this article (doi:10.1186/s12920-017-0249-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Julia Abramowitz
- Department of Hematology, Hadassah-Hebrew University Medical Center, P.O. Box 12000, Jerusalem, 91120, Israel.
| | - Tzahi Neuman
- Department of Pathology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Riki Perlman
- Department of Hematology, Hadassah-Hebrew University Medical Center, P.O. Box 12000, Jerusalem, 91120, Israel
| | - Dina Ben-Yehuda
- Department of Hematology, Hadassah-Hebrew University Medical Center, P.O. Box 12000, Jerusalem, 91120, Israel
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Banach M, Robert J. Tumor immunology viewed from alternative animal models-the Xenopus story. CURRENT PATHOBIOLOGY REPORTS 2017; 5:49-56. [PMID: 28944105 DOI: 10.1007/s40139-017-0125-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A PURPOSE OF REVIEW Nonmammalian comparative animal models are important not only to gain fundamental evolutionary understanding of the complex interactions of tumors with the immune system, but also to better predict the applicability of novel immunotherapeutic approaches to humans. After reviewing recent advances in developing alternative models, we focus on the amphibian Xenopus laevis and its usefulness in deciphering the perplexing roles of MHC class I-like molecules and innate (i)T cells in tumor immunity. B RECENT FINDINGS Experiments using MHC-defined inbred and cloned animals, tumor cell lines, effective reagents, sequenced genomes, and adapted gene editing techniques in Xenopus, have revealed that the critical involvement of class I-like molecules and iT cells in tumor immunity has been conserved during evolution. C SUMMARY Comparative studies with the X. laevis tumor immunity model can contribute to the development of better and more efficient cancer immunotherapies.
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Affiliation(s)
- Maureen Banach
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, USA
| | - Jacques Robert
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, USA
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Carrasco Salas P, Fernández L, Vela M, Bueno D, González B, Valentín J, Lapunzina P, Pérez-Martínez A. The role of CDKN2A/B deletions in pediatric acute lymphoblastic leukemia. Pediatr Hematol Oncol 2016; 33:415-422. [PMID: 27960642 DOI: 10.1080/08880018.2016.1251518] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The CDKN2A/B genes in the 9p21 chromosomal region are frequently involved in human cancer, including pediatric acute lymphoblastic leukemia (ALL). These genes encode 3 proteins that belong to the RB1 and TP53 pathways and act as tumor suppressors by regulating the G1/S checkpoint of the cell cycle. The prognostic value of deletions in the CDKN2A/B locus in ALL is controversial in part due to the limitations of the methodologies used. Further studies with advanced technologies are needed for elucidation. Future studies would also highlight whether CDK4/CDK6 selective inhibitors might be useful therapies for children with these genetic aberrations.
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Affiliation(s)
- P Carrasco Salas
- a Laboratory of Molecular Pediatric Hemato-Oncology , Institute of Medical and Molecular Genetics (INGEMM), Hospital Universitario La Paz , Madrid , Spain
| | - L Fernández
- b Clinical Research Program , Cancer Research National Centre , Madrid , Spain
| | - M Vela
- c Innate Immune Research Group, IdiPAZ , Madrid , Spain
| | - D Bueno
- d Department of Pediatric Hemato-Oncology and Stem Cell Transplantation , Hospital Infantil Universitario La Paz , Madrid , Spain
| | - B González
- d Department of Pediatric Hemato-Oncology and Stem Cell Transplantation , Hospital Infantil Universitario La Paz , Madrid , Spain
| | - J Valentín
- c Innate Immune Research Group, IdiPAZ , Madrid , Spain
| | - P Lapunzina
- a Laboratory of Molecular Pediatric Hemato-Oncology , Institute of Medical and Molecular Genetics (INGEMM), Hospital Universitario La Paz , Madrid , Spain
| | - A Pérez-Martínez
- a Laboratory of Molecular Pediatric Hemato-Oncology , Institute of Medical and Molecular Genetics (INGEMM), Hospital Universitario La Paz , Madrid , Spain.,c Innate Immune Research Group, IdiPAZ , Madrid , Spain.,d Department of Pediatric Hemato-Oncology and Stem Cell Transplantation , Hospital Infantil Universitario La Paz , Madrid , Spain
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High Expression of Human Homologue of Murine Double Minute 4 and the Short Splicing Variant, HDM4-S, in Bone Marrow in Patients With Acute Myeloid Leukemia or Myelodysplastic Syndrome. CLINICAL LYMPHOMA MYELOMA & LEUKEMIA 2016; 16 Suppl:S30-8. [DOI: 10.1016/j.clml.2016.03.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 03/23/2016] [Indexed: 12/19/2022]
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Organista-Nava J, Gómez-Gómez Y, Illades-Aguiar B, Leyva-Vázquez MA. Regulation of the miRNA expression by TEL/AML1, BCR/ABL, MLL/AF4 and TCF3/PBX1 oncoproteins in acute lymphoblastic leukemia (Review). Oncol Rep 2016; 36:1226-32. [PMID: 27431573 DOI: 10.3892/or.2016.4948] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Accepted: 03/28/2016] [Indexed: 11/06/2022] Open
Abstract
MicroRNAs (miRNAs) are a class of small endogenous non-coding RNAs that play important regulatory roles by targeting mRNAs for cleavage or translational repression. miRNAs act in diverse biological processes including development, cell growth, apoptosis, and hematopoiesis. The miRNA expression is associated with specific cytogenetic changes and can also be used to discriminate between the different subtypes of leukemia in acute lymphoblastic leukemia with common translocations, it is shown that the miRNAs have the potential to be used for clinical diagnosis and prognosis. We reviewed the roles of miRNA here with emphasis on their function in human leukemia and the mechanisms of the TEL/AML1, BCR/ABL, MLL/AF4 and TCF3/PBX1 oncoproteins on miRNAs expression in acute lymphoblastic leukemia.
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Affiliation(s)
- Jorge Organista-Nava
- Institute of Cellular Physiology, National Autonomous University of Mexico (UNAM), University City, D.F., Mexico
| | - Yazmín Gómez-Gómez
- Institute of Cellular Physiology, National Autonomous University of Mexico (UNAM), University City, D.F., Mexico
| | - Berenice Illades-Aguiar
- Laboratory of Molecular Biomedicine, School of Chemical-Biological Sciences, Guerrero State University, Chilpancingo, Guerrero, Mexico
| | - Marco Antonio Leyva-Vázquez
- Laboratory of Molecular Biomedicine, School of Chemical-Biological Sciences, Guerrero State University, Chilpancingo, Guerrero, Mexico
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Kojima K, Ishizawa J, Andreeff M. Pharmacological activation of wild-type p53 in the therapy of leukemia. Exp Hematol 2016; 44:791-798. [PMID: 27327543 DOI: 10.1016/j.exphem.2016.05.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 05/26/2016] [Indexed: 10/21/2022]
Abstract
The tumor suppressor p53 is inactivated by mutations in the majority of human solid tumors. Conversely, p53 mutations are rare in leukemias and are only observed in a small fraction of the patient population, predominately in patients with complex karyotype acute myeloid leukemia or hypodiploid acute lymphoblastic leukemia. However, the loss of p53 function in leukemic cells is often caused by abnormalities in p53-regulatory proteins, including overexpression of MDM2/MDMX, deletion of CDKN2A/ARF, and alterations in ATM. For example, MDM2 inhibits p53-mediated transcription, promotes its nuclear export, and induces proteasome-dependent degradation. The MDM2 homolog MDMX is another direct regulator of p53 that inhibits p53-mediated transcription. Several small-molecule inhibitors and stapled peptides targeting MDM2 and MDMX have been developed and have recently entered clinical trials. The clinical trial results of the first clinically used MDM2 inhibitor, RG7112, illustrated promising p53 activation and apoptosis induction in leukemia cells as proof of concept. Side effects of RG7112 were most prominent in suppression of thrombopoiesis and gastrointestinal symptoms in leukemia patients. Predictive biomarkers for response to MDM2 inhibitors have been proposed, but they require further validation both in vitro and in vivo so that the accumulated knowledge concerning pathological p53 dysregulation in leukemia and novel molecular-targeted strategies to overcome this dysregulation can be translated safely and efficiently into novel clinical therapeutics.
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Affiliation(s)
- Kensuke Kojima
- Department of Hematology, Respiratory Medicine and Oncology, Division of Medicine, Saga University, Saga, Japan; Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas M.D. Anderson Cancer Center, Houston, TX, USA.
| | - Jo Ishizawa
- Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas M.D. Anderson Cancer Center, Houston, TX, USA
| | - Michael Andreeff
- Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas M.D. Anderson Cancer Center, Houston, TX, USA
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Saleem M, Yusoff NM. Fusion genes in malignant neoplastic disorders of haematopoietic system. ACTA ACUST UNITED AC 2016; 21:501-12. [PMID: 26871368 DOI: 10.1080/10245332.2015.1106816] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The new World Health Organization's (WHO) classification of haematopoietic and lymphoid tissue neoplasms incorporating the recurrent fusion genes as the defining criteria for different haematopoietic malignant phenotypes is reviewed. The recurrent fusion genes incorporated in the new WHO's classification and other chromosomal rearrangements of haematopoietic and lymphoid tissue neoplasms are reviewed. METHODOLOGY Cytokines and transcription factors in haematopoiesis and leukaemic mechanisms are described. Genetic features and clinical implications due to the encoded chimeric neoproteins causing malignant haematopoietic disorders are reviewed. RESULTS AND DISCUSSION Multiple translocation partner genes are well known for leukaemia such as MYC, MLL, RARA, ALK, and RUNX1. With the advent of more sophisticated diagnostic tools and bioinformatics algorithms, an exponential growth in fusion genes discoveries is likely to increase. CONCLUSION Demonstration of fusion genes and their specific translocation breakpoints in malignant haematological disorders are crucial for understanding the molecular pathogenesis and clinical phenotype of cancer, determining prognostic indexes and therapeutic responses, and monitoring residual disease and relapse status.
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Affiliation(s)
- Mohamed Saleem
- a Advanced Medical and Dental Institute , Universiti Sains Malaysia , Kepala Batas , Penang , Malaysia
| | - Narazah Mohd Yusoff
- a Advanced Medical and Dental Institute , Universiti Sains Malaysia , Kepala Batas , Penang , Malaysia
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Ishizawa J, Kojima K, Chachad D, Ruvolo P, Ruvolo V, Jacamo RO, Borthakur G, Mu H, Zeng Z, Tabe Y, Allen JE, Wang Z, Ma W, Lee HC, Orlowski R, Sarbassov DD, Lorenzi PL, Huang X, Neelapu SS, McDonnell T, Miranda RN, Wang M, Kantarjian H, Konopleva M, Davis RE, Andreeff M. ATF4 induction through an atypical integrated stress response to ONC201 triggers p53-independent apoptosis in hematological malignancies. Sci Signal 2016; 9:ra17. [PMID: 26884599 DOI: 10.1126/scisignal.aac4380] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The clinical challenge posed by p53 abnormalities in hematological malignancies requires therapeutic strategies other than standard genotoxic chemotherapies. ONC201 is a first-in-class small molecule that activates p53-independent apoptosis, has a benign safety profile, and is in early clinical trials. We found that ONC201 caused p53-independent apoptosis and cell cycle arrest in cell lines and in mantle cell lymphoma (MCL) and acute myeloid leukemia (AML) samples from patients; these included samples from patients with genetic abnormalities associated with poor prognosis or cells that had developed resistance to the nongenotoxic agents ibrutinib and bortezomib. Moreover, ONC201 caused apoptosis in stem and progenitor AML cells and abrogated the engraftment of leukemic stem cells in mice while sparing normal bone marrow cells. ONC201 caused changes in gene expression similar to those caused by the unfolded protein response (UPR) and integrated stress responses (ISRs), which increase the translation of the transcription factor ATF4 through an increase in the phosphorylation of the translation initiation factor eIF2α. However, unlike the UPR and ISR, the increase in ATF4 abundance in ONC201-treated hematopoietic cells promoted apoptosis and did not depend on increased phosphorylation of eIF2α. ONC201 also inhibited mammalian target of rapamycin complex 1 (mTORC1) signaling, likely through ATF4-mediated induction of the mTORC1 inhibitor DDIT4. Overexpression of BCL-2 protected against ONC201-induced apoptosis, and the combination of ONC201 and the BCL-2 antagonist ABT-199 synergistically increased apoptosis. Thus, our results suggest that by inducing an atypical ISR and p53-independent apoptosis, ONC201 has clinical potential in hematological malignancies.
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Affiliation(s)
- Jo Ishizawa
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Kensuke Kojima
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA. Division of Hematology, Respiratory Medicine and Oncology, Department of Medicine, Saga University, Saga 840-8502, Japan
| | - Dhruv Chachad
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Peter Ruvolo
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Vivian Ruvolo
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Rodrigo O Jacamo
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Gautam Borthakur
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Hong Mu
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Zhihong Zeng
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Yoko Tabe
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA. Department of Clinical Laboratory Medicine, Juntendo University School of Medicine, Tokyo 113-8431, Japan
| | | | - Zhiqiang Wang
- Department of Lymphoma/Myeloma, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Wencai Ma
- Department of Lymphoma/Myeloma, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Hans C Lee
- Department of Lymphoma/Myeloma, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Robert Orlowski
- Department of Lymphoma/Myeloma, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Dos D Sarbassov
- Department of Molecular and Cellular Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Philip L Lorenzi
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Xuelin Huang
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Sattva S Neelapu
- Department of Lymphoma/Myeloma, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Timothy McDonnell
- Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Roberto N Miranda
- Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Michael Wang
- Department of Lymphoma/Myeloma, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Hagop Kantarjian
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Marina Konopleva
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - R Eric Davis
- Department of Lymphoma/Myeloma, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
| | - Michael Andreeff
- Section of Molecular Hematology and Therapy, Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
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Studies of Tumor Suppressor Genes via Chromosome Engineering. Cancers (Basel) 2015; 8:cancers8010004. [PMID: 26729168 PMCID: PMC4728451 DOI: 10.3390/cancers8010004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 12/19/2015] [Accepted: 12/21/2015] [Indexed: 12/01/2022] Open
Abstract
The development and progression of malignant tumors likely result from consecutive accumulation of genetic alterations, including dysfunctional tumor suppressor genes. However, the signaling mechanisms that underlie the development of tumors have not yet been completely elucidated. Discovery of novel tumor-related genes plays a crucial role in our understanding of the development and progression of malignant tumors. Chromosome engineering technology based on microcell-mediated chromosome transfer (MMCT) is an effective approach for identification of tumor suppressor genes. The studies have revealed at least five tumor suppression effects. The discovery of novel tumor suppressor genes provide greater understanding of the complex signaling pathways that underlie the development and progression of malignant tumors. These advances are being exploited to develop targeted drugs and new biological therapies for cancer.
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Schiefer AI, Kornauth C, Simonitsch-Klupp I, Skrabs C, Masel EK, Streubel B, Vanura K, Walter K, Migschitz B, Stoiber D, Sexl V, Raderer M, Chott A, da Silva MG, Cabecadas J, Müllauer L, Jäger U, Porpaczy E. Impact of Single or Combined Genomic Alterations of TP53, MYC, and BCL2 on Survival of Patients With Diffuse Large B-Cell Lymphomas: A Retrospective Cohort Study. Medicine (Baltimore) 2015; 94:e2388. [PMID: 26717387 PMCID: PMC5291628 DOI: 10.1097/md.0000000000002388] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
MYC and BCL2 translocations as well as TP53 deletion/mutation are known risk factors in diffuse large B-cell lymphoma (DLBCL) but their interplay is not well understood.In this retrospective cohort study, we evaluated the combined prognostic impact of TP53 deletion and mutation status, MYC and BCL2 genomic breaks in tumor samples of 101 DLBCL patients. The cohort included 53 cases with MYC rearrangements (MYC+).TP53 deletions/mutations (TP53+) were found in 32 of 101 lymphomas and were equally distributed between MYC+ and MYC- cases (35.8% vs. 27.1%). TP53+ lymphomas had lower responses to treatment than TP53- (complete remission 34.4% vs. 60.9%; P = 0.01). TP53 alteration was the dominant independent prognostic factor in multivariate analysis (P = 0.01). Overall survival (OS) varied considerably between subgroups with different genomic alterations: Patients with sole MYC translocation, and interestingly, with triple MYC+/BCL2+/TP53+ aberration had favorable outcomes (median OS not reached) similar to patients without genomic alterations (median OS 65 months). In contrast, patients with MYC+/BCL2+/TP53- double-hit lymphomas (DHL) (28 months), MYC+/BCL2-/TP53+ lymphomas (10 months) or sole TP53 mutation/deletion (12 months) had a poor median OS. Our findings demonstrate differences in OS of DLBCL patients depending on absence or presence of single or combined genetic alterations of MYC, BCL2, and TP53. Cooccurrence of TP53 and BCL2 aberrations ameliorated the poor prognostic impact of single TP53+ or BCL2+ in MYC positive patients.This pilot study generates evidence for the complex interplay between the alterations of genetic pathways in DLBCL, which goes beyond the concept of DHL. The variable survival of DLBCL patients dependent on single or combined alterations in the TP53, MYC, and BCL2 genes indicates the need for comprehensive genomic diagnosis.
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Affiliation(s)
- Ana-Iris Schiefer
- From the Clinical Institute of Pathology, Medical University of Vienna, Vienna, Austria (A-IS, CK, IS-K, BS, KW, BM, LM); Division of Hematology and Hemostaseology, Department of Internal Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria (CS, KV, UJ, EP); Division of Palliative Care, Department of Internal Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria (EKM); Institute of Pharmacology, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria (DS); Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria (DS); Institute of Pharmacology and Toxicology, Department of Biomedical Sciences, Veterinary University of Vienna, Vienna, Austria (VS); Division of Oncology, Department of Internal Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria (MR); Institute of Pathology and Bacteriology, Wilhelminenspital, Vienna, Austria (AC); Portuguese Institute of Oncology, Haematology Unit, Lisbon, Portugal (MGdS); and Portuguese Institute of Anatomical Pathology, Lisbon, Portugal (JC)
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Iwasaki M, Liedtke M, Gentles AJ, Cleary ML. CD93 Marks a Non-Quiescent Human Leukemia Stem Cell Population and Is Required for Development of MLL-Rearranged Acute Myeloid Leukemia. Cell Stem Cell 2015; 17:412-21. [PMID: 26387756 DOI: 10.1016/j.stem.2015.08.008] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 05/28/2015] [Accepted: 08/10/2015] [Indexed: 12/16/2022]
Abstract
Leukemia stem cells (LSCs) are thought to share several properties with hematopoietic stem cells (HSCs), including cell-cycle quiescence and a capacity for self-renewal. These features are hypothesized to underlie leukemic initiation, progression, and relapse, and they also complicate efforts to eradicate leukemia through therapeutic targeting of LSCs without adverse effects on HSCs. Here, we show that acute myeloid leukemias (AMLs) with genomic rearrangements of the MLL gene contain a non-quiescent LSC population. Although human CD34(+)CD38(-) LSCs are generally highly quiescent, the C-type lectin CD93 is expressed on a subset of actively cycling, non-quiescent AML cells enriched for LSC activity. CD93 expression is functionally required for engraftment of primary human AML LSCs and leukemogenesis, and it regulates LSC self-renewal predominantly by silencing CDKN2B, a major tumor suppressor in AML. Thus, CD93 expression identifies a predominantly cycling, non-quiescent leukemia-initiating cell population in MLL-rearranged AML, providing opportunities for selective targeting and eradication of LSCs.
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Affiliation(s)
- Masayuki Iwasaki
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Michaela Liedtke
- Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Andrew J Gentles
- Department of Radiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Michael L Cleary
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA.
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Direct regulation of p53 by miR-142a-3p mediates the survival of hematopoietic stem and progenitor cells in zebrafish. Cell Discov 2015; 1:15027. [PMID: 27462426 PMCID: PMC4860776 DOI: 10.1038/celldisc.2015.27] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 08/11/2015] [Indexed: 02/06/2023] Open
Abstract
Hematopoietic stem and progenitor cells have the capacity to self-renew and differentiate into all blood cell lineages, and thus sustain life-long homeostasis of the hematopoietic system. Although intensive studies have focused on the orchestrated genetic network of hematopoietic stem and progenitor cell specification and expansion, relatively little is known on the regulation of hematopoietic stem and progenitor cell survival during embryogenesis. Here, we generated two types of miR-142a-3p genetic mutants in zebrafish and showed that the loss-of-function mutants displayed severe reduction of hematopoietic stem and progenitor cells. Further analysis showed that the diminished proliferation and excessive apoptosis in miR-142a-3p mutants were attributed to the increased p53 signaling. Mechanistically, we demonstrated that miR-142a-3p directly targets p53 during hematopoietic stem and progenitor cell development, and the hematopoietic stem and progenitor cell survival defect in miR-142a-3p mutants could be rescued by loss of p53. Therefore, our work reveals the significance of the miR-142a-3p-p53 pathway in controlling hematopoietic stem and progenitor cell survival, and thus advances our understanding of the role of p53 in vertebrate hematopoiesis.
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Ghazavi F, Lammens T, Van Roy N, Poppe B, Speleman F, Benoit Y, Van Vlierberghe P, De Moerloose B. Molecular basis and clinical significance of genetic aberrations in B-cell precursor acute lymphoblastic leukemia. Exp Hematol 2015; 43:640-53. [DOI: 10.1016/j.exphem.2015.05.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 05/26/2015] [Accepted: 05/28/2015] [Indexed: 12/25/2022]
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Xu H, Zhang H, Yang W, Yadav R, Morrison AC, Qian M, Devidas M, Liu Y, Perez-Andreu V, Zhao X, Gastier-Foster JM, Lupo PJ, Neale G, Raetz E, Larsen E, Bowman WP, Carroll WL, Winick N, Williams R, Hansen T, Holm JC, Mardis E, Fulton R, Pui CH, Zhang J, Mullighan CG, Evans WE, Hunger SP, Gupta R, Schmiegelow K, Loh ML, Relling MV, Yang JJ. Inherited coding variants at the CDKN2A locus influence susceptibility to acute lymphoblastic leukaemia in children. Nat Commun 2015; 6:7553. [PMID: 26104880 PMCID: PMC4544058 DOI: 10.1038/ncomms8553] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 05/20/2015] [Indexed: 02/05/2023] Open
Abstract
There is increasing evidence from genome-wide association studies for a strong inherited genetic basis of susceptibility to acute lymphoblastic leukaemia (ALL) in children, yet the effects of protein-coding variants on ALL risk have not been systematically evaluated. Here we show a missense variant in CDKN2A associated with the development of ALL at genome-wide significance (rs3731249, P=9.4 × 10(-23), odds ratio=2.23). Functional studies indicate that this hypomorphic variant results in reduced tumour suppressor function of p16(INK4A), increases the susceptibility to leukaemic transformation of haematopoietic progenitor cells, and is preferentially retained in ALL tumour cells. Resequencing the CDKN2A-CDKN2B locus in 2,407 childhood ALL cases reveals 19 additional putative functional germline variants. These results provide direct functional evidence for the influence of inherited genetic variation on ALL risk, highlighting the important and complex roles of CDKN2A-CDKN2B tumour suppressors in leukaemogenesis.
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Affiliation(s)
- Heng Xu
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
- Department of Laboratory Medicine, National Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Hui Zhang
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
- Department of Pediatrics, The first affiliated hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, China
| | - Wenjian Yang
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Rachita Yadav
- Centre for Biological Sequence Analysis, The Technical University of Denmark, Kgs, Lyngby DK-2800, Denmark
| | - Alanna C. Morrison
- Department of Epidemiology, Human Genetics, and Environmental Sciences, School of Public Health, University of Texas Health Science Center, Houston, Texas 77030, USA
| | - Maoxiang Qian
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Meenakshi Devidas
- Department of Biostatistics, Epidemiology and Health Policy Research, College of Medicine, University of Florida, Gainesville, Florida 32610, USA
| | - Yu Liu
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Virginia Perez-Andreu
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Xujie Zhao
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Julie M. Gastier-Foster
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, and Departments of Pathology and Pediatrics, Ohio State University College of Medicine, Columbus, Ohio 43205, USA
| | - Philip J. Lupo
- Department of Pediatrics, Texas Children's Cancer Center, Baylor College of Medicine, Houston, Texas 77030, USA
| | - Geoff Neale
- Hartwell Center for Bioinformatics & Biotechnology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Elizabeth Raetz
- Huntsman Cancer Institute, The University of Utah, Salt Lake City, Utah 84112, USA
| | - Eric Larsen
- Maine Children's Cancer Program, Scarborough, Maine 04074, USA
| | - W. Paul Bowman
- Cook Children's Medical Center, Ft. Worth, Texas 38754, USA
| | - William L. Carroll
- Pediatric Oncology, Cancer Institute New York University, New York City, New York 10016, USA
| | - Naomi Winick
- Pediatric Hematology/Oncology, University of Texas Southwestern Medical Center, Dallas, Texas 75235, USA
| | | | - Torben Hansen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen DK-2200, Denmark
| | - Jens-Christian Holm
- Department of Pediatrics, The Children's Obesity Clinic, Copenhagen University Hospital Holbaek, Holbaek DK-4300, Denmark
| | - Elaine Mardis
- McDonnell Genome Institute, Washington University School of Medicine, St Louis, Missouri 63108, USA
| | - Robert Fulton
- McDonnell Genome Institute, Washington University School of Medicine, St Louis, Missouri 63108, USA
| | - Ching-Hon Pui
- Hematological Malignancies Program, Comprehensive Cancer Center, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Jinghui Zhang
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Charles G. Mullighan
- Hematological Malignancies Program, Comprehensive Cancer Center, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - William E. Evans
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
- Hematological Malignancies Program, Comprehensive Cancer Center, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Stephen P. Hunger
- Division of Oncology and Center for Childhood Cancer Research, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Ramneek Gupta
- Centre for Biological Sequence Analysis, The Technical University of Denmark, Kgs, Lyngby DK-2800, Denmark
| | - Kjeld Schmiegelow
- Department of Paediatrics and Adolescent Medicine, The Juliane Marie Centre, The University Hospital Rigshospitalet, and the Institute of Clinical Medicine, Faculty of Health, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Mignon L. Loh
- Department of Pediatrics, Benioff Children's Hospital and the Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, California 94115, USA
| | - Mary V. Relling
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
- Hematological Malignancies Program, Comprehensive Cancer Center, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Jun J. Yang
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
- Hematological Malignancies Program, Comprehensive Cancer Center, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
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Advanced targeted therapies in cancer: Drug nanocarriers, the future of chemotherapy. Eur J Pharm Biopharm 2015; 93:52-79. [PMID: 25813885 DOI: 10.1016/j.ejpb.2015.03.018] [Citation(s) in RCA: 1025] [Impact Index Per Article: 113.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 03/13/2015] [Accepted: 03/16/2015] [Indexed: 02/08/2023]
Abstract
Cancer is the second worldwide cause of death, exceeded only by cardiovascular diseases. It is characterized by uncontrolled cell proliferation and an absence of cell death that, except for hematological cancers, generates an abnormal cell mass or tumor. This primary tumor grows thanks to new vascularization and, in time, acquires metastatic potential and spreads to other body sites, which causes metastasis and finally death. Cancer is caused by damage or mutations in the genetic material of the cells due to environmental or inherited factors. While surgery and radiotherapy are the primary treatment used for local and non-metastatic cancers, anti-cancer drugs (chemotherapy, hormone and biological therapies) are the choice currently used in metastatic cancers. Chemotherapy is based on the inhibition of the division of rapidly growing cells, which is a characteristic of the cancerous cells, but unfortunately, it also affects normal cells with fast proliferation rates, such as the hair follicles, bone marrow and gastrointestinal tract cells, generating the characteristic side effects of chemotherapy. The indiscriminate destruction of normal cells, the toxicity of conventional chemotherapeutic drugs, as well as the development of multidrug resistance, support the need to find new effective targeted treatments based on the changes in the molecular biology of the tumor cells. These novel targeted therapies, of increasing interest as evidenced by FDA-approved targeted cancer drugs in recent years, block biologic transduction pathways and/or specific cancer proteins to induce the death of cancer cells by means of apoptosis and stimulation of the immune system, or specifically deliver chemotherapeutic agents to cancer cells, minimizing the undesirable side effects. Although targeted therapies can be achieved directly by altering specific cell signaling by means of monoclonal antibodies or small molecules inhibitors, this review focuses on indirect targeted approaches that mainly deliver chemotherapeutic agents to molecular targets overexpressed on the surface of tumor cells. In particular, we offer a detailed description of different cytotoxic drug carriers, such as liposomes, carbon nanotubes, dendrimers, polymeric micelles, polymeric conjugates and polymeric nanoparticles, in passive and active targeted cancer therapy, by enhancing the permeability and retention or by the functionalization of the surface of the carriers, respectively, emphasizing those that have received FDA approval or are part of the most important clinical studies up to date. These drug carriers not only transport the chemotherapeutic agents to tumors, avoiding normal tissues and reducing toxicity in the rest of the body, but also protect cytotoxic drugs from degradation, increase the half-life, payload and solubility of cytotoxic agents and reduce renal clearance. Despite the many advantages of all the anticancer drug carriers analyzed, only a few of them have reached the FDA approval, in particular, two polymer-protein conjugates, five liposomal formulations and one polymeric nanoparticle are available in the market, in contrast to the sixteen FDA approval of monoclonal antibodies. However, there are numerous clinical trials in progress of polymer-protein and polymer-drug conjugates, liposomal formulations, including immunoliposomes, polymeric micelles and polymeric nanoparticles. Regarding carbon nanotubes or dendrimers, there are no FDA approvals or clinical trials in process up to date due to their unresolved toxicity. Moreover, we analyze in detail the more promising and advanced preclinical studies of the particular case of polymeric nanoparticles as carriers of different cytotoxic agents to active and passive tumor targeting published in the last 5 years, since they have a huge potential in cancer therapy, being one of the most widely studied nano-platforms in this field in the last years. The interest that these formulations have recently achieved is stressed by the fact that 90% of the papers based on cancer therapeutics with polymeric nanoparticles have been published in the last 6 years (PubMed search).
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Relationship between urinary nickel and methylation of p15, p16 in workers exposed to nickel. J Occup Environ Med 2015; 56:489-92. [PMID: 24806561 DOI: 10.1097/jom.0000000000000168] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The purpose of this study was to investigate the relationship between urinary nickel and methylation of p15, p16 in workers exposed to nickel. METHODS In this study, 165 nickel-exposed workers and 67 workers without exposure were recruited. The levels of urinary nickel were analyzed using dimethylglyoxime spectrophotometric method. Methylation-specific polymerase chain reaction was used to detect the methylation of p15 and p16. RESULTS The median concentration of urinary nickel in the exposed group (4.58 μg/L) was significantly higher than that in the control group (1.78 μg/L; P < 0.01). The rate of methylation of p15 in the exposed group was significantly higher than that in the control group (P = 0.023). The multiple logistic analysis showed that workers having higher urinary nickel were at the higher risk of methylation of p15 (P = 0.024). CONCLUSIONS The levels of urinary nickel were significantly associated with the methylation of p15.
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Bodoor K, Haddad Y, Alkhateeb A, Al-Abbadi A, Dowairi M, Magableh A, Bsoul N, Ghabkari A. DNA hypermethylation of cell cycle (p15 and p16) and apoptotic (p14, p53, DAPK and TMS1) genes in peripheral blood of leukemia patients. Asian Pac J Cancer Prev 2014; 15:75-84. [PMID: 24528084 DOI: 10.7314/apjcp.2014.15.1.75] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Aberrant DNA methylation of tumor suppressor genes has been reported in all major types of leukemia with potential involvement in the inactivation of regulatory cell cycle and apoptosis genes. However, most of the previous reports did not show the extent of concurrent methylation of multiple genes in the four leukemia types. Here, we analyzed six key genes (p14, p15, p16, p53, DAPK and TMS1) for DNA methylation using methylation specific PCR to analyze peripheral blood of 78 leukemia patients (24 CML, 25 CLL, 12 AML, and 17 ALL) and 24 healthy volunteers. In CML, methylation was detected for p15 (11%), p16 (9%), p53 (23%) and DAPK (23%), in CLL, p14 (25%), p15 (19%), p16 (12%), p53 (17%) and DAPK (36%), in AML, p14 (8%), p15 (45%), p53 (9%) and DAPK (17%) and in ALL, p15 (14%), p16 (8%), and p53 (8%). This study highlighted an essential role of DAPK methylation in chronic leukemia in contrast to p15 methylation in the acute cases, whereas TMS1 hypermethylation was absent in all cases. Furthermore, hypermethylation of multiple genes per patient was observed, with obvious selectiveness in the 9p21 chromosomal region genes (p14, p15 and p16). Interestingly, methylation of p15 increased the risk of methylation in p53, and vice versa, by five folds (p=0.03) indicating possible synergistic epigenetic disruption of different phases of the cell cycle or between the cell cycle and apoptosis. The investigation of multiple relationships between methylated genes might shed light on tumor specific inactivation of the cell cycle and apoptotic pathways.
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Affiliation(s)
- Khaldon Bodoor
- Department of Biology, Jordan University of Science and Technology, Irbid, Jordan E-mail :
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