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Oskouian B, Lee JY, Asgharzadeh S, Khan R, Zhang M, Weisbrod JR, Choi YJ, Puri L, Aguilar AE, Zhao P, Saba JD. AF1q is a universal marker of neuroblastoma that sustains N-Myc expression and drives tumorigenesis. Oncogene 2024; 43:1203-1213. [PMID: 38413795 PMCID: PMC11014797 DOI: 10.1038/s41388-024-02980-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/06/2024] [Accepted: 02/12/2024] [Indexed: 02/29/2024]
Abstract
Neuroblastoma is the most common extracranial malignant tumor of childhood, accounting for 15% of all pediatric cancer deaths. Despite significant advances in our understanding of neuroblastoma biology, five-year survival rates for high-risk disease remain less than 50%, highlighting the importance of identifying novel therapeutic targets to combat the disease. MYCN amplification is the most frequent and predictive molecular aberration correlating with poor outcome in neuroblastoma. N-Myc is a short-lived protein primarily due to its rapid proteasomal degradation, a potentially exploitable vulnerability in neuroblastoma. AF1q is an oncoprotein with established roles in leukemia and solid tumor progression. It is normally expressed in brain and sympathetic neurons and has been postulated to play a part in neural differentiation. However, no role for AF1q in tumors of neural origin has been reported. In this study, we found AF1q to be a universal marker of neuroblastoma tumors. Silencing AF1q in neuroblastoma cells caused proteasomal degradation of N-Myc through Ras/ERK and AKT/GSK3β pathways, activated p53 and blocked cell cycle progression, culminating in cell death via the intrinsic apoptotic pathway. Moreover, silencing AF1q attenuated neuroblastoma tumorigenicity in vivo signifying AF1q's importance in neuroblastoma oncogenesis. Our findings reveal AF1q to be a novel regulator of N-Myc and potential therapeutic target in neuroblastoma.
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Affiliation(s)
- Babak Oskouian
- Department of Pediatrics and the Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA, USA
| | - Joanna Y Lee
- Department of Pediatrics and the Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA, USA
| | - Shahab Asgharzadeh
- Children's Hospital of Los Angeles, University of Southern California, Los Angeles, CA, USA
| | - Ranjha Khan
- Department of Pediatrics and the Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA, USA
| | - Meng Zhang
- Department of Pediatrics and the Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA, USA
| | - Julia R Weisbrod
- Department of Pediatrics and the Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA, USA
| | - Youn-Jeong Choi
- Department of Pediatrics and the Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA, USA
| | - Latika Puri
- Loma Linda University Children's Hospital, Loma Linda, CA, USA
| | - Ana E Aguilar
- Arnold Palmer Hospital for Children, Orlando, FL, USA
| | - Piming Zhao
- Department of Pediatrics and the Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA, USA
| | - Julie D Saba
- Department of Pediatrics and the Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA, USA.
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Proestling K, Husslein H, Hudson QJ, Witzmann-Stern M, Widmar B, Bagó-Horváth Z, Sandrieser L, Perricos A, Wenzl R, Yotova I. MLLT11 Regulates Endometrial Stroma Cell Adhesion, Proliferation and Survival in Ectopic Lesions of Women with Advanced Endometriosis. Int J Mol Sci 2023; 25:439. [PMID: 38203610 PMCID: PMC10778601 DOI: 10.3390/ijms25010439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/26/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
MLLT11 is a gene implicated in cell differentiation and the development and progression of human cancers, but whose role in the pathogenesis of endometriosis is still unknown. Using quantitative RT-PCR and immunohistochemistry, we analyzed 37 women with and 33 women without endometriosis for differences in MLLT11 expression. We found that MLLT11 is reduced in the ectopic stroma cells of women with advanced stage endometriosis compared to women without endometriosis. MLLT11 knockdown in control stroma cells resulted in the downregulation of their proliferation accompanied by G1 cell arrest and an increase in the expression of p21 and p27. Furthermore, the knockdown of MLLT11 was associated with increased apoptosis resistance to camptothecin associated with changes in BCL2/BAX signaling. Finally, MLLT11 siRNA knockdown in the control primary stroma cells led to an increase in cell adhesion associated with the transcriptional activation of ACTA2 and TGFB2. We found that the cellular phenotype of MLLT11 knockdown cells resembled the phenotype of the primary endometriosis stroma cells of the lesion, where the levels of MLLT11 are significantly reduced compared to the eutopic stroma cells of women without the disease. Overall, our results indicate that MLLT11 may be a new clinically relevant player in the pathogenesis of endometriosis.
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Affiliation(s)
- Katharina Proestling
- Department of Obstetrics and Gynecology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria; (K.P.); (H.H.); (Q.J.H.); (M.W.-S.); (B.W.); (L.S.); (A.P.); (R.W.)
| | - Heinrich Husslein
- Department of Obstetrics and Gynecology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria; (K.P.); (H.H.); (Q.J.H.); (M.W.-S.); (B.W.); (L.S.); (A.P.); (R.W.)
| | - Quanah James Hudson
- Department of Obstetrics and Gynecology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria; (K.P.); (H.H.); (Q.J.H.); (M.W.-S.); (B.W.); (L.S.); (A.P.); (R.W.)
| | - Matthias Witzmann-Stern
- Department of Obstetrics and Gynecology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria; (K.P.); (H.H.); (Q.J.H.); (M.W.-S.); (B.W.); (L.S.); (A.P.); (R.W.)
| | - Barbara Widmar
- Department of Obstetrics and Gynecology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria; (K.P.); (H.H.); (Q.J.H.); (M.W.-S.); (B.W.); (L.S.); (A.P.); (R.W.)
| | - Zsuzsanna Bagó-Horváth
- Department of Pathology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria;
| | - Lejla Sandrieser
- Department of Obstetrics and Gynecology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria; (K.P.); (H.H.); (Q.J.H.); (M.W.-S.); (B.W.); (L.S.); (A.P.); (R.W.)
| | - Alexandra Perricos
- Department of Obstetrics and Gynecology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria; (K.P.); (H.H.); (Q.J.H.); (M.W.-S.); (B.W.); (L.S.); (A.P.); (R.W.)
| | - René Wenzl
- Department of Obstetrics and Gynecology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria; (K.P.); (H.H.); (Q.J.H.); (M.W.-S.); (B.W.); (L.S.); (A.P.); (R.W.)
| | - Iveta Yotova
- Department of Obstetrics and Gynecology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria; (K.P.); (H.H.); (Q.J.H.); (M.W.-S.); (B.W.); (L.S.); (A.P.); (R.W.)
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Liu X, Bai W, Li J, Ma J, Liu Y, Wang Z, Hu L, Li Z, Papukashvili D, Rcheulishvili N, Wang F, Lu X. MLLT11 siRNA Inhibits the Migration and Promotes the Apoptosis of MDA-MB-231 Breast Cancer Cells. Breast J 2023; 2023:6282654. [PMID: 38075552 PMCID: PMC10708952 DOI: 10.1155/2023/6282654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 12/18/2023]
Abstract
Breast cancer is considered the most prevalent malignancy due to its high incidence rate, recurrence, and metastasis in women that makes it one of the deadliest cancers. The current study aimed to predict the genes associated with the recurrence and metastasis of breast cancer and to validate their effect on MDA-MB-231 cells. Through the bioinformatics analysis, the transcription factor 7 cofactor (MLLT11) as the target gene was obtained. MLLT11-specific siRNA was synthesized and transfected into MDA-MB-231 cells. The results demonstrated that the siRNA significantly reduced the MLLT11 mRNA levels. Moreover, cell migration and invasion, as well as the protein levels of phosphatidylinositol 3-kinase (PI3K), AKT, matrix metalloproteinase (MMP) 2, and MMP9, were significantly lower in the groups treated with siRNA while the apoptosis was augmented. Collectively, MLLT11 siRNA elicited ameliorative properties on breast cancer cells, possibly via the inhibition of the PI3K/AKT signaling pathway.
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Affiliation(s)
- Xiangrong Liu
- Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan 030001, China
| | - Wenqi Bai
- Breast Surgery, The Second Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Jianrong Li
- Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan 030001, China
| | - Jinfeng Ma
- Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan 030001, China
| | - Yan Liu
- Shanxi Medical University, Taiyuan 030006, China
| | | | - Linjie Hu
- Shanxi Medical University, Taiyuan 030006, China
| | - Zheng Li
- Shanxi Medical University, Taiyuan 030006, China
| | | | | | - Fusheng Wang
- Breast Surgery, The Second Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Xiaoqing Lu
- Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan 030001, China
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Chen L, Xiong Z, Zhao H, Teng C, Liu H, Huang Q, Wanggou S, Li X. Identification of the novel prognostic biomarker, MLLT11, reveals its relationship with immune checkpoint markers in glioma. Front Oncol 2022; 12:889351. [PMID: 36033495 PMCID: PMC9414891 DOI: 10.3389/fonc.2022.889351] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 07/19/2022] [Indexed: 11/13/2022] Open
Abstract
AimThis study aimed to explore the expression pattern of MLLT11 under different pathological features, evaluate its prognostic value for glioma patients, reveal the relationship between MLLT11 mRNA expression and immune cell infiltration in the tumor microenvironment (TME), and provide more evidence for the molecular diagnosis of glioma and immunotherapy.MethodsUsing large-scale bioinformatic approach and RNA sequencing (RNA-seq) data from public databases The Cancer Genome Atlas (TCGA), Chinese Glioma Genome Atlas (CGGA), and The Gene Expression Omnibus (GEO)), we investigated the relationship between MLLT11 mRNA levels and pathologic characteristics. The distribution in the different subtypes was observed based on Verhaak bulk and Neftel single-cell classification. Then, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis were used for bioinformatic analysis. Kaplan–Meier survival analysis and Cox regression analysis were used for survival analysis. Correlation analyses were performed between MLLT11 expression and 22 immune cells and immune checkpoints in the TME.ResultsWe found that MLLT11 expression is decreased in high-grade glioma tissues; we further verified this result by RTPCR, Western blotting, and immunohistochemistry using our clinical samples. According to the Verhaak classification, high MLLT11 expression is mostly clustered in pro-neutral (PN) and neutral (NE) subtypes, while in the Neftel classification, MLLT11 mainly clustered in neural progenitor-like (NPC-like) neoplastic cells. Survival analysis revealed that low levels of MLLT11 expression are associated with a poorer prognosis; MLLT11 was identified as an independent prognostic factor in multivariate Cox regression analyses. Functional enrichment analyses of MLLT11 with correlated expression indicated that low MLLT11 expression is associated with the biological process related to the extracellular matrix, and the high expression group is related to the synaptic structure. Correlation analyses suggest that declined MLLT11 expression is associated with increased macrophage infiltration in glioma, especially M2 macrophage, and verified by RTPCR, Western blotting, and immunohistochemistry using our clinical glioma samples. MLLT11 had a highly negative correlation with immune checkpoint inhibitor (ICI) genes including PDCD1, PD-L1, TIM3(HAVCR2), and PD‐L2 (PDCD1LG2).ConclusionMLLT11 plays a crucial role in the progression of glioma and has the potential to be a new prognostic marker for glioma.
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Affiliation(s)
- Long Chen
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, China
| | - Zujian Xiong
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, China
| | - Hongyu Zhao
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, China
| | - Chubei Teng
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, China
| | - Hongwei Liu
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, China
| | - Qi Huang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, China
| | - Siyi Wanggou
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Siyi Wanggou, ; Xuejun Li,
| | - Xuejun Li
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Hunan International Scientific and Technological Cooperation Base of Brain Tumor Research, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Siyi Wanggou, ; Xuejun Li,
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5
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Gruber ES, Oberhuber G, Birner P, Schlederer M, Kenn M, Schreiner W, Jomrich G, Schoppmann SF, Gnant M, Tse W, Kenner L. The Oncogene AF1Q is Associated with WNT and STAT Signaling and Offers a Novel Independent Prognostic Marker in Patients with Resectable Esophageal Cancer. Cells 2019; 8:E1357. [PMID: 31671695 PMCID: PMC6912824 DOI: 10.3390/cells8111357] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/24/2019] [Accepted: 10/29/2019] [Indexed: 12/24/2022] Open
Abstract
AF1q impairs survival in hematologic and solid malignancies. AF1q expression is associated with tumor progression, migration, and chemoresistance, and acts as a transcriptional co-activator in WNT and STAT signaling. This study evaluates the role of AF1q in patients with resectable esophageal cancer (EC). A total of 278 patients operated on for esophageal cancer were retrospectively included, and the expression of AF1q, CD44, and pYSTAT3 was analyzed following immunostaining. Quantified data were processed to correlational and survival analysis. In EC patients, an elevated expression of AF1q was associated with CD44 (p = 0.004), and pYSTAT3 (p = 0.0002). High AF1q expression in primary tumors showed high AF1q expression in the corresponding lymph nodes (p= 0.016). AF1q expression was higher after neoadjuvant therapy (p= 0.0002). Patients with AF1q-positive EC relapsed and died earlier compared to patients with AF1q-negative EC (disease-free survival (DFS), p= 0.0005; disease-specific survival (DSS), p= 0.003); in the multivariable Cox regression model, AF1q proved to be an independent prognostic marker (DFS, p= 0.01; DSS, p= 0.03). AF1q is associated with WNT and STAT signaling; it impairs and independently predicts DFS and DSS in patients with resectable EC. The testing of AF1q could facilitate prognosis estimation and provide a possibility of identifying the patients responsive to the therapeutic blockade of its oncogenic downstream targets.
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Affiliation(s)
- Elisabeth S Gruber
- Division of General Surgery, Department of Surgery, Comprehensive Cancer Center, Medical University of Vienna, 1090 Vienna, Austria.
| | - Georg Oberhuber
- Institute of Pathology, Department of Experimental and Translational Pathology, Medical University of Vienna, 1090 Vienna, Austria.
- PIZ - patho im zentrum GmbH, 3100 St. Poelten, Lower Austria, Austria.
| | - Peter Birner
- Institute of Pathology, Department of Experimental and Translational Pathology, Medical University of Vienna, 1090 Vienna, Austria.
| | - Michaela Schlederer
- Institute of Pathology, Department of Experimental and Translational Pathology, Medical University of Vienna, 1090 Vienna, Austria.
| | - Michael Kenn
- Section of Biosimulation and Bioinformatics, Center for Medical Statistics, Informatics and Intelligent Systems (CeMSIIS), Medical University of Vienna, 1090 Vienna, Austria.
| | - Wolfgang Schreiner
- Section of Biosimulation and Bioinformatics, Center for Medical Statistics, Informatics and Intelligent Systems (CeMSIIS), Medical University of Vienna, 1090 Vienna, Austria.
| | - Gerd Jomrich
- Division of General Surgery, Department of Surgery, Comprehensive Cancer Center, Medical University of Vienna, 1090 Vienna, Austria.
| | - Sebastian F Schoppmann
- Division of General Surgery, Department of Surgery, Comprehensive Cancer Center, Medical University of Vienna, 1090 Vienna, Austria.
| | - Michael Gnant
- Division of General Surgery, Department of Surgery, Comprehensive Cancer Center, Medical University of Vienna, 1090 Vienna, Austria.
| | - William Tse
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY 40202, USA.
- Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville, School of Medicine, Louisville, KY 40202, USA.
| | - Lukas Kenner
- Institute of Pathology, Department of Experimental and Translational Pathology, Medical University of Vienna, 1090 Vienna, Austria.
- Christian Doppler Laboratory for Applied Metabolomics (CDL-AM), Medical University of Vienna, 1090 Vienna, Austria.
- Institute of Laboratory Animal Pathology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria.
- CBmed Core Lab 2, Medical University of Vienna, 1090 Vienna, Austria.
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Togano T, Kim N, Kim N, Park GS, Park AK, Bennet M, Park J. The evaluation of Cannabidiol's effect on the immunotherapy of Burkitt lymphoma. Biochem Biophys Res Commun 2019; 520:225-230. [PMID: 31587870 DOI: 10.1016/j.bbrc.2019.10.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 10/01/2019] [Indexed: 01/19/2023]
Abstract
AIM AF1q has a precise oncogenic function. The purpose of this study is to investigate whether CBD has an effect on the AF1q/ICAM-1 regulatory axis in Burkitt's lymphoma (BL), and thus has potential to enhance immunotherapy and reduce side effects. METHODS We established BL cell lines with altered AF1q expression using lentivirus. After confirmation of gene expression by RT-PCR, cells were treated with CBD followed by co-culture of killing assay. RESULTS AF1q increased oncogenic growth and colony formation, and induced resistance against cell-mediated cytotoxic chemotherapy through attenuation of ICAM-1 expression in BL. CBD was able to reverse the acquired resistance mediated by AF1q/ICAM-1 regulatory axis. CONCLUSION CBD holds potential to enhance the efficacy of immunotherapy for BL with hyperactive AF1q/ICAM-1 regulatory axis, and warrants further study.
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Affiliation(s)
- Tomiteru Togano
- Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA; Division of Haematology, National Center for Global Health and Medicine, Tokyo, Japan
| | - Naomi Kim
- Dupont Manual High School, Louisville, KY, USA
| | - Natalie Kim
- Dupont Manual High School, Louisville, KY, USA
| | | | - Alex K Park
- Dupont Manual High School, Louisville, KY, USA
| | - Maura Bennet
- Northern Kentucky University, Highland Heights, KY, USA
| | - Jino Park
- Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA.
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Khan N, Park J, Dean WL, Gray RD, Tse W, Lee D, Sabo TM. Recombinant expression and purification of AF1q and its interaction with T-cell Factor 7. Protein Expr Purif 2019; 165:105499. [PMID: 31541685 DOI: 10.1016/j.pep.2019.105499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/12/2019] [Accepted: 09/17/2019] [Indexed: 11/17/2022]
Abstract
The protein ALL1 fused from chromosome 1q (AF1q) is overexpressed in a variety of cancers and acts to activate several signaling pathways that lead to oncogenesis. For example, AF1q has been shown to interact with T-cell Factor 7 (TCF7; also known as TCF1) from the Wnt/β-catenin pathway resulting in the transcriptional activation of the CD44 and the enhancement of breast cancer metastasis. Despite the importance of AF1q in facilitating oncogenesis and metastasis, the structural and biophysical properties of AF1q remain largely unexplored due to the absence of a viable method for producing recombinant protein. Here, we report the overexpression of AF1q in E. coli as a fusion to a N-terminal His6-tag, which forms inclusion bodies (IBs) during expression. The AF1q protein was purified from IBs under denaturing conditions by immobilized metal affinity chromatography followed by a successful one-step dialysis refolding. Refolded AF1q was further purified to homogeneity by gel filtration chromatography resulting in an overall yield of 35 mg/L culture. Our nuclear magnetic resonance (NMR) and analytical ultracentrifugation (AUC) measurements reveal AF1q interacts with TCF7, specifically with TCF7's high-mobility group (HMG) domain (residues 154-237), which is, to our knowledge, the first biophysical characterization of the AF1q and TCF7 interaction.
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Affiliation(s)
- Nazimuddin Khan
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 505 S. Hancock St., Louisville, KY, 40202, USA
| | - Jino Park
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 505 S. Hancock St., Louisville, KY, 40202, USA
| | - William L Dean
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 505 S. Hancock St., Louisville, KY, 40202, USA
| | - Robert D Gray
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 505 S. Hancock St., Louisville, KY, 40202, USA
| | - William Tse
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 505 S. Hancock St., Louisville, KY, 40202, USA
| | - Donghan Lee
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 505 S. Hancock St., Louisville, KY, 40202, USA.
| | - T Michael Sabo
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 505 S. Hancock St., Louisville, KY, 40202, USA.
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Akhter A, Farooq F, Elyamany G, Mughal MK, Rashid-Kolvear F, Shabani-Rad MT, Street L, Mansoor A. Acute Myeloid Leukemia (AML): Upregulation of BAALC/MN1/MLLT11/EVI1 Gene Cluster Relate With Poor Overall Survival and a Possible Linkage With Coexpression of MYC/BCL2 Proteins. Appl Immunohistochem Mol Morphol 2018; 26:483-8. [PMID: 28362701 DOI: 10.1097/PAI.0000000000000452] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Molecular heterogeneity accounts for the variable and often poor prognosis in acute myeloid leukemia (AML). The current risk stratification strategy in clinical practice is limited to karyotyping and limited molecular studies screening for genetic mutations such as FLT-3 and NPM1. There is opportunity to identify further molecular prognostic markers, which may also lay the groundwork for the development of novel targeted therapies. Complex molecular technologies require transition into widely available laboratory platforms, for better integration into routine clinical practice. METHOD In a defined subset (MYC/BCL2 or MYC/BCL2) of AML patients (n=20), we examined expression signature of several genes (n=12) of established prognostic value in AML. RNA expression and MYC/BCL2 protein pattern was correlated with 3 cytogenetic risk groups and overall survival. RESULTS K-means++ unsupervised clustering defined 2 distinct groups with high and low transcript levels of BAALC/MN1/MLLT11/EVI1/SOCS2 genes (>2.5-fold difference; P<0.001). This mRNA signature trended with higher prevalence of MYC/BCL2 coexpression (P<0.057) and poor overall survival (P<0.036), but did not correlate with conventional cytogenetic risk groups (P<0.084). CONCLUSIONS This pilot study provides useful data, which may help further refine the prognostic scheme of AML patients outside conventional cytogenetic risk groups. It also presents some biological rationale for future studies to explore the use of novel agents targeting MYC and/or BCL2 genes in combination with conventional chemotherapy protocols for AML.
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Dubois A, Furstoss N, Calleja A, Zerhouni M, Cluzeau T, Savy C, Marchetti S, Hamouda MA, Boulakirba S, Orange F, Lacas-Gervais S, Karsenti JM, Mounier N, Tamburini J, Puissant A, Luciano F, Jacquel A, Auberger P, Robert G. LAMP2 expression dictates azacytidine response and prognosis in MDS/AML. Leukemia 2019; 33:1501-13. [PMID: 30607021 DOI: 10.1038/s41375-018-0336-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 11/21/2018] [Accepted: 11/28/2018] [Indexed: 12/31/2022]
Abstract
Chaperone-mediated autophagy (CMA) is a highly selective form of autophagy. During CMA, the HSC70 chaperone carries target proteins endowed with a KFERQ-like motif to the lysosomal receptor LAMP2A, which then translocate them into lysosomes for degradation. In the present study, we scrutinized the mechanisms underlying the response and resistance to Azacytidine (Aza) in MDS/AML cell lines and bone marrow CD34+ blasts from MDS/AML patients. In engineered Aza-resistant MDS cell lines and some AML cell lines, we identified a profound defect in CMA linked to the absence of LAMP2A. LAMP2 deficiency was responsible for Aza resistance and hypersensitivity to lysosome and autophagy inhibitors. Accordingly, gain of function of LAMP2 in deficient cells or loss of function in LAMP2-expressing cells rendered them sensitive or resistant to Aza, respectively. A strict correlation was observed between the absence of LAMP2, resistance to Aza and sensitivity to lysosome inhibitors. Low levels of LAMP2 expression in CD34+ blasts from MDS/AML patients correlated with lack of sensitivity to Aza and were predictive of poor overall survival. We propose that CD34+/LAMP2Low patients at diagnosis or who become CD34+/LAMP2Low during the course of treatment with Aza might benefit from a lysosome inhibitor already used in the clinic.
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10
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Li W, Ji M, Lu F, Pang Y, Dong X, Zhang J, Li P, Ye J, Zang S, Ma D, Ji C. Novel AF1q/MLLT11 favorably affects imatinib resistance and cell survival in chronic myeloid leukemia. Cell Death Dis 2018; 9:855. [PMID: 30154435 PMCID: PMC6113287 DOI: 10.1038/s41419-018-0900-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 04/06/2018] [Accepted: 07/16/2018] [Indexed: 01/09/2023]
Abstract
Tyrosine kinase inhibitor treatment of chronic myeloid leukemia (CML) has demonstrated beneficial effects. However, resistance to tyrosine kinase inhibitors and disease relapse are still a challenge for CML therapy. In this study, we analyzed bone marrow samples from 149 CML patients and 15 control donors, and investigated the affect of AF1q on CML cell survival and engraftment in vitro and in vivo. We found that AF1q/MLLT11 expression was significantly upregulated in CML patients, especially in CD34+ CML cells. Elevated AF1q expression was associated with disease progression. Knockdown of AF1q enhanced imatinib sensitivity, induced apoptosis, and suppressed growth in CML cells. Moreover, AF1q deficiency sensitized CD34+ CML cells to imatinib. In contrast, upregulation of AF1q promoted cell survival, protected CML cells from imatinib-induced apoptosis, and increased engraftment of CML cells in vivo. We further identified a positive correlation between AF1q and CD44 expression in chronic phase CML patients and CD34+ CML cells. Importantly, AF1q contributes to imatinib-resistance in CML by regulating the expression of CD44. These findings reveal a novel BCR-ABL-independent pathway, AF1q/CD44, involves imatinib resistance in CML, thus representing a potential therapeutic target for imatinib-resistant CML patients.
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Affiliation(s)
- Wei Li
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Min Ji
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Fei Lu
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Yihua Pang
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Xin Dong
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Jingru Zhang
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Peng Li
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Jingjing Ye
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Shaolei Zang
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Daoxin Ma
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Chunyan Ji
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China.
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11
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Park J, Kim S, Joh J, Remick SC, Miller DM, Yan J, Kanaan Z, Chao JH, Krem MM, Basu SK, Hagiwara S, Kenner L, Moriggl R, Bunting KD, Tse W. MLLT11/AF1q boosts oncogenic STAT3 activity through Src-PDGFR tyrosine kinase signaling. Oncotarget 2018; 7:43960-43973. [PMID: 27259262 PMCID: PMC5190071 DOI: 10.18632/oncotarget.9759] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 04/29/2016] [Indexed: 01/05/2023] Open
Abstract
Constitutive STAT3 activation by tyrosine phosphorylation of mutated or amplified tyrosine kinases (pYSTAT3) is critical for cancer initiation, progression, invasion, and motility of carcinoma cells. We showed that AF1q is associated with STAT3 signaling in breast cancer cells. In xenograft models, enhanced AF1q expression activated STAT3 and promoted tumor growth and metastasis in immunodeficient NSG mice. The cytokine secretory phenotype of MDA-MB-231LN breast cancer cells with altered AF1q expression revealed changes in expression of platelet-derived growth factor subunit B (PDGF-B). AF1q-induced PDGF-B stimulated motility, migration, and invasion of MDA-MB-231LN cells, and AF1q up-regulated platelet-derived growth factor receptor (PDGFR) signaling. Further, AF1q-induced PDGFR signaling enhanced STAT3 activity through Src kinase activation, which could be blocked by the Src kinase inhibitor PP1. Moreover, AF1q up-regulated tyrosine kinase signaling through PDGFR signaling, which was blockable by imatinib. In conclusion, we demonstrated that enhanced AF1q expression contributes to persistent and oncogenic pYSTAT3 levels in invasive carcinoma cells by activating Src kinase through activation of the PDGF-B/PDGFR cascade. Therefore, AF1q plays an essential role as a cofactor in PDGF-B-driven STAT3 signaling.
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Affiliation(s)
- Jino Park
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA.,Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Soojin Kim
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA.,Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Joongho Joh
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA
| | - Scot C Remick
- Maine Medical Center Research Institute, Portland, ME, USA
| | - Donald M Miller
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA
| | - Jun Yan
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA.,Department of Medicine and Department of Microbiology and Immunology, University of Louisville, Louisville, KY, USA
| | - Zeyad Kanaan
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA
| | - Ju-Hsien Chao
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA.,Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Maxwell M Krem
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA.,Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Soumit K Basu
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA.,Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Shotaro Hagiwara
- Division of Hematology, Internal Medicine, National Center for Global Health and Medicine, Shinjuku, Japan
| | - Lukas Kenner
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Clinical Institute for Pathology, Medical University of Vienna, Vienna, Austria.,Unit of Pathology of Laboratory Animals (UPLA), University of Veterinary Medicine, Vienna, Austria
| | - Richard Moriggl
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Medical University of Vienna, Vienna, Austria
| | - Kevin D Bunting
- Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, GA, USA
| | - William Tse
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY, USA.,Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
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12
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Tiberio P, Lozneanu L, Angeloni V, Cavadini E, Pinciroli P, Callari M, Carcangiu ML, Lorusso D, Raspagliesi F, Pala V, Daidone MG, Appierto V. Involvement of AF1q/MLLT11 in the progression of ovarian cancer. Oncotarget 2017; 8:23246-23264. [PMID: 28423573 PMCID: PMC5410301 DOI: 10.18632/oncotarget.15574] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 02/12/2017] [Indexed: 12/15/2022] Open
Abstract
The functional role of AF1q/MLLT11, an oncogenic factor involved in a translocation t(1;11)(q21;q23) responsible for acute myeloid leukaemia, has been investigated in hematological and solid malignancies and its expression was found to be linked to tumor progression and poor clinical outcome. In addition to its oncogenic function, AF1q has been shown to play a role in the onset of basal and drug-induced apoptosis in cancer cells of different histotypes, including ovarian cancer. Through in vitro, ex vivo, and in silico approaches, we demonstrated here that AF1q is also endowed with protumorigenic potential in ovarian cancer. In ovarian cancer cell lines, stable AF1q overexpression caused activation of epithelial-to-mesenchymal transition and increased motility/migratory/invasive abilities accompanied by gene expression changes mainly related to Wnt signaling and to signaling pathways involving in ERK/p38 activation. The potential role of AF1q in ovarian cancer progression was confirmed by immunohistochemical and in silico analyses performed in ovarian tumor specimens which revealed that the protein was absent in normal ovarian epithelium and became detectable when atypical proliferation was present. Moreover, AF1q was significantly lower in borderline ovarian tumors (i.e., tumors of low malignant potential without stromal invasion) than in invasive tumors, thus corroborating the association between high AF1q expression and increased migratory/invasive cell behavior and confirming its potential role in ovarian cancer progression. Our findings demonstrated, for the first time, that AF1q is endowed with protumorigenic activity in ovarian cancer, thus highlighting a dual behavior (i.e., protumorigenic and proapoptotic functions) of the protein in the malignancy.
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Affiliation(s)
- Paola Tiberio
- Department of Experimental Oncology and Molecular Medicine, Biomarkers Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Ludmila Lozneanu
- Department of Experimental Oncology and Molecular Medicine, Biomarkers Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.,Department of Morphofunctional Sciences-Histology, Patology, "Grigore T. Popa" University of Medicine and Pharmacy, Iassy, Romania
| | - Valentina Angeloni
- Department of Experimental Oncology and Molecular Medicine, Biomarkers Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Elena Cavadini
- Department of Experimental Oncology and Molecular Medicine, Biomarkers Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Patrizia Pinciroli
- Department of Experimental Oncology and Molecular Medicine, Functional Genomics Facility, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Maurizio Callari
- Department of Experimental Oncology and Molecular Medicine, Biomarkers Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.,Present address: Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, United Kingdom
| | - Maria Luisa Carcangiu
- Department of Pathology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Domenica Lorusso
- Department of Surgery, Gynecologic Oncology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Francesco Raspagliesi
- Department of Surgery, Gynecologic Oncology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Valentina Pala
- Department of Experimental Oncology and Molecular Medicine, Biomarkers Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Maria Grazia Daidone
- Department of Experimental Oncology and Molecular Medicine, Biomarkers Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Valentina Appierto
- Department of Experimental Oncology and Molecular Medicine, Biomarkers Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
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13
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Tang Y, Wang XW, Liu ZH, Sun YM, Tang YX, Zhou DH. Chaperone-mediated autophagy substrate proteins in cancer. Oncotarget 2017; 8:51970-51985. [PMID: 28881704 PMCID: PMC5584305 DOI: 10.18632/oncotarget.17583] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 04/07/2017] [Indexed: 01/10/2023] Open
Abstract
All intracellular proteins undergo continuous synthesis and degradation. Chaperone-mediated autophagy (CMA) is necessary to maintain cellular homeostasis through turnover of cytosolic proteins (substrate proteins). This degradation involves a series of substrate proteins including both cancer promoters and suppressors. Since activating or inhibiting CMA pathway to treat cancer is still debated, targeting to the CMA substrate proteins provides a novel direction. We summarize the cancer-associated substrate proteins which are degraded by CMA. Consequently, CMA substrate proteins catalyze the glycolysis which contributes to the Warburg effect in cancer cells. The fact that the degradation of substrate proteins based on the CMA can be altered by posttranslational modifications such as phosphorylation or acetylation. In conclusion, targeting to CMA substrate proteins develops into a new anticancer therapeutic approach.
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Affiliation(s)
- Ying Tang
- Department of Oncology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Xiong-Wen Wang
- Department of Oncology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Zhan-Hua Liu
- Department of Oncology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Yun-Ming Sun
- Department of Gynecology and Obstetrics, Maternal and Child Health Hospital of Zhoushan, Zhoushan 316000, China
| | - Yu-Xin Tang
- Department of Gynecology and Obstetrics, Maternal and Child Health Hospital of Zhoushan, Zhoushan 316000, China
| | - Dai-Han Zhou
- Department of Oncology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
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14
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Tse CO, Kim S, Park J. Activation of Wnt signaling pathway by AF1q enriches stem-like population and enhance mammosphere formation of breast cells. Biochem Biophys Res Commun 2017; 484:884-889. [DOI: 10.1016/j.bbrc.2017.02.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 02/05/2017] [Indexed: 02/06/2023]
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15
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Krepischi ACV, Maschietto M, Ferreira EN, Silva AG, Costa SS, da Cunha IW, Barros BDF, Grundy PE, Rosenberg C, Carraro DM. Genomic imbalances pinpoint potential oncogenes and tumor suppressors in Wilms tumors. Mol Cytogenet 2016; 9:20. [PMID: 26913079 DOI: 10.1186/s13039-016-0227-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 02/06/2016] [Indexed: 12/31/2022] Open
Abstract
Background Wilms tumor (WT) has a not completely elucidated pathogenesis. DNA copy number alterations (CNAs) are common in cancer, and often define key pathogenic events. The aim of this work was to investigate CNAs in order to disclose new candidate genes for Wilms tumorigenesis. Results Array-CGH of 50 primary WTs without pre-chemotherapy revealed a few recurrent CNAs not previously reported, such as 7q and 20q gains, and 7p loss. Genomic amplifications were exclusively detected in 3 cases of WTs that later relapsed, which also exhibited an increased frequency of gains affecting a 16.2 Mb 1q21.1-q23.2 region, losses at 11p, 11q distal, and 16q, and WT1 deletions. Conversely, aneuploidies of chromosomes 13 and 19 were found only in WTs without further relapse. The 1q21.1-q23.2 gain associated with WT relapse harbours genes such as CHD1L, CRABP2, GJA8, MEX3A and MLLT11 that were found to be over-expressed in WTs. In addition, down-regulation of genes encompassed by focal deletions highlighted new potential tumor suppressors such as CNKSR1, MAN1C1, PAQR7 (1p36), TWIST1, SOSTDC1 (7p14.1-p12.2), BBOX and FIBIN (11p13), and PLCG2 (16q). Conclusion This study confirmed the presence of CNAs previously related to WT and characterized new CNAs found only in few cases. The later were found in higher frequency in relapsed cases, suggesting that they could be associated with WT progression. Electronic supplementary material The online version of this article (doi:10.1186/s13039-016-0227-y) contains supplementary material, which is available to authorized users.
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16
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Li L, Yang C, Liu X, Yang S, Ye S, Jia J, Liu W, Zhang Y. Elevated expression of microRNA-30b in osteoarthritis and its role in ERG regulation of chondrocyte. Biomed Pharmacother 2015; 76:94-9. [PMID: 26653555 DOI: 10.1016/j.biopha.2015.10.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 10/16/2015] [Indexed: 12/30/2022] Open
Abstract
ERG (ETS-related gene) belongs to the ETS family of transcription factors, and has been recently reported to contribute to homeostatic balance in skeleton cell plasticity. MicroRNA-30 (miR-30) family is also demonstrated to play a role in controlling chondrocyte differentiation. The current study investigated the miR-30b and ERG expression in articular cartilage of osteoarthritis (OA) patients. A total of 20 subjects, with 10 OA patients and 10 healthy participants, were included in this study. Human chondrosarcoma cell line SW1353 was used to explore the relationship of miR-30b and ERG in vitro. In OA patients, a significant increase of miR-30b and a decrease of ERG were observed in articular cartilage compared with Normal ones. MiR-30b mimic down-regulated the ERG mRNA and protein expression levels, while miR-30b inhibitor up-regulated ERG expression. In addition, miR-30b mimic also decreased the mRNA expression of COL2a and aggrecan, while miR-30b inhibitor had the opposite effect. Luciferase reporter assay confirmed that miR-30b targeted ERG. In conclusion, miR-30b was involved in the process of OA, and it probably functioned through its target gene ERG.
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Affiliation(s)
- Lisong Li
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
| | - Cao Yang
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Xianzhe Liu
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Shuhua Yang
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Shunan Ye
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Jie Jia
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Wei Liu
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yukun Zhang
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
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17
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Park J, Schlederer M, Schreiber M, Ice R, Merkel O, Bilban M, Hofbauer S, Kim S, Addison J, Zou J, Ji C, Bunting ST, Wang Z, Shoham M, Huang G, Bago-Horvath Z, Gibson LF, Rojanasakul Y, Remick S, Ivanov A, Pugacheva E, Bunting KD, Moriggl R, Kenner L, Tse W. AF1q is a novel TCF7 co-factor which activates CD44 and promotes breast cancer metastasis. Oncotarget 2015; 6:20697-710. [PMID: 26079538 PMCID: PMC4653036 DOI: 10.18632/oncotarget.4136] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 04/21/2015] [Indexed: 01/29/2023] Open
Abstract
AF1q is an MLL fusion partner that was identified from acute myeloid leukemia (AML) patients with t (1; 11) (q21; q23) chromosomal abnormality. The function of AF1q is not yet fully known, however, elevated AF1q expression is associated with poor clinical outcomes in various malignancies. Here, we show that AF1q specifically binds to T-cell-factor-7 (TCF7) in the Wnt signaling pathway and results in transcriptional activation of CD44 as well as multiple downstream targets of the TCF7/LEF1. In addition, enhanced AF1q expression promotes breast cancer cell proliferation, migration, mammosphere formation, and chemo-resistance. In xenograft models, enforced AF1q expression in breast cancer cells also promotes liver metastasis and lung colonization. In a cohort of 63 breast cancer patients, higher percentages of AF1q-positive cancer cells in primary sites were associated with significantly poorer overall survival (OS), disease-free survival (DFS), and brain metastasis-free survival (b-MFS). Using paired primary/metastatic samples from the same patients, we demonstrate that AF1q-positive breast cancer cells become dynamically dominant in the metastatic sites compared to the primary sites. Our findings indicate that breast cancer cells with a hyperactive AF1q/TCF7/CD44 regulatory axis in the primary sites may represent "metastatic founder cells" which have invasive properties.
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Affiliation(s)
- Jino Park
- James Graham Brown Cancer Center, Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Michaela Schlederer
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
- Clinical Institute for Pathology, Medical University Vienna, Austria
| | - Martin Schreiber
- Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Ryan Ice
- Mary Babb Randolph Cancer Center, West Virginia University Health Science Center, Morgantown, WV, USA
- Department of Biochemistry, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Olaf Merkel
- National Center for Tumor Diseases, German Cancer Research Center, Heidelberg, Germany
| | - Martin Bilban
- Department of Laboratory Medicine, Medical University of Vienna and Core Facility Genomics, Core Facilities, Medical University of Vienna, Vienna, Austria
| | - Sebastian Hofbauer
- Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Soojin Kim
- James Graham Brown Cancer Center, Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Joseph Addison
- Mary Babb Randolph Cancer Center, West Virginia University Health Science Center, Morgantown, WV, USA
- Department of Biochemistry, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Jie Zou
- Department of Hematology, Qilu Hospital, Shandong University School of Medicine, Jinan, Shandong, PR China
| | - Chunyan Ji
- Department of Hematology, Qilu Hospital, Shandong University School of Medicine, Jinan, Shandong, PR China
| | - Silvia T. Bunting
- Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, GA, USA
| | - Zhengqi Wang
- Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, GA, USA
| | - Menachem Shoham
- Case Western University School of Medicine, Cleveland, OH, USA
| | - Gang Huang
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | | | - Laura F. Gibson
- Mary Babb Randolph Cancer Center, West Virginia University Health Science Center, Morgantown, WV, USA
| | - Yon Rojanasakul
- Mary Babb Randolph Cancer Center, West Virginia University Health Science Center, Morgantown, WV, USA
- Department of Pharmaceutical Science, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Scot Remick
- Mary Babb Randolph Cancer Center, West Virginia University Health Science Center, Morgantown, WV, USA
| | - Alexey Ivanov
- Mary Babb Randolph Cancer Center, West Virginia University Health Science Center, Morgantown, WV, USA
- Department of Biochemistry, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Elena Pugacheva
- Mary Babb Randolph Cancer Center, West Virginia University Health Science Center, Morgantown, WV, USA
- Department of Biochemistry, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Kevin D. Bunting
- Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, GA, USA
| | - Richard Moriggl
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Medical University of Vienna, Vienna, Austria
| | - Lukas Kenner
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
- Clinical Institute for Pathology, Medical University Vienna, Austria
- Unit of Pathology of Laboratory Animals (UPLA), University of Veterinary Medicine, Vienna, Austria
| | - William Tse
- James Graham Brown Cancer Center, Division of Blood and Bone Marrow Transplantation, Department of Medicine, University of Louisville School of Medicine, Louisville, KY, USA
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18
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Li P, Ji M, Lu F, Zhang J, Li H, Cui T, Li Wang X, Tang D, Ji C. Degradation of AF1Q by chaperone-mediated autophagy. Exp Cell Res 2014; 327:48-56. [PMID: 24880125 DOI: 10.1016/j.yexcr.2014.05.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 05/08/2014] [Accepted: 05/20/2014] [Indexed: 11/29/2022]
Abstract
AF1Q, a mixed lineage leukemia gene fusion partner, is identified as a poor prognostic biomarker for pediatric acute myeloid leukemia (AML), adult AML with normal cytogenetic and adult myelodysplastic syndrome. AF1Q is highly regulated during hematopoietic progenitor differentiation and development but its regulatory mechanism has not been defined clearly. In the present study, we used pharmacological and genetic approaches to influence chaperone-mediated autophagy (CMA) and explored the degradation mechanism of AF1Q. Pharmacological inhibitors of lysosomal degradation, such as chloroquine, increased AF1Q levels, whereas activators of CMA, including 6-aminonicotinamide and nutrient starvation, decreased AF1Q levels. AF1Q interacts with HSPA8 and LAMP-2A, which are core components of the CMA machinery. Knockdown of HSPA8 or LAMP-2A increased AF1Q protein levels, whereas overexpression showed the opposite effect. Using an amino acid deletion AF1Q mutation plasmid, we identified that AF1Q had a KFERQ-like motif which was recognized by HSPA8 for CMA-dependent proteolysis. In conclusion, we demonstrate for the first time that AF1Q can be degraded in lysosomes by CMA.
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Affiliation(s)
- Peng Li
- Department of Hematology, Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan 250012, P.R. China
| | - Min Ji
- Department of Hematology, Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan 250012, P.R. China
| | - Fei Lu
- Department of Hematology, Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan 250012, P.R. China
| | - Jingru Zhang
- Department of Hematology, Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan 250012, P.R. China
| | - Huanjie Li
- Research Center for Cell Therapy, Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan 250012, P.R. China
| | - Taixing Cui
- Research Center for Cell Therapy, Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan 250012, P.R. China
| | - Xing Li Wang
- Research Center for Cell Therapy, Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan 250012, P.R. China
| | - Dongqi Tang
- Research Center for Cell Therapy, Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan 250012, P.R. China; Center for Stem Cell & Regenerative Medicine, The Second Hospital of Shandong University, Jinan 250033, P.R. China.
| | - Chunyan Ji
- Department of Hematology, Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan 250012, P.R. China.
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Valdiglesias V, Fernández-Tajes J, Méndez J, Pásaro E, Laffon B. The marine toxin okadaic acid induces alterations in the expression level of cancer-related genes in human neuronal cells. Ecotoxicol Environ Saf 2013; 92:303-311. [PMID: 23561263 DOI: 10.1016/j.ecoenv.2013.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 03/04/2013] [Accepted: 03/05/2013] [Indexed: 06/02/2023]
Abstract
Okadaic acid (OA) is one of the most common and highly distributed marine toxins. It can be accumulated in several molluscs and other marine organisms and cause acute gastrointestinal symptoms after oral consumption by humans, called diarrheic shellfish poisoning. However other toxic effects beyond these gastrointestinal symptoms were also reported. Thus, OA was found to induce important chromosomal abnormalities and other genetic injuries that can lead to severe pathologies, including cancer. Furthermore, the relationship between OA and carcinogenic processes has been previously demonstrated in in vivo studies with rodents, and also suggested in human epidemiological studies. In this context, further research is required to better understand the underlying mechanisms of OA-related tumourigenesis. In a previous study, we identified 247 genes differentially expressed in SHSY5Y neuroblastoma cells exposed to 100nM OA at different times (3, 24 and 48h) by means of suppression subtractive hybridization. These genes were involved in relevant cell functions such as signal transduction, cell cycle, metabolism, and transcription and translation processes. However, due to the high potential percentage of false positives that may be obtained by this approach, results from SSH are recommended to be analyzed by an independent method. In the present study, we selected ten genes related to cancer initiation or progression, directly or indirectly, for further quantitative PCR analysis (ANAPC13, PTTG1, CALM2, CLU, HN1, MALAT1, MAPRE2, MLLT11, SGA-81M and TAX1BP1). Results obtained showed important alterations in the expression patterns of all the genes evaluated at one or more treatment times, providing, for the first time, a possible explanation at the molecular level of the potential relationship between the consumption of OA-contaminated shellfish and the incidence of different cancers in humans. Nevertheless, given the complexity of this process, more exhaustive studies are required before drawing any final conclusion.
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Affiliation(s)
- Vanessa Valdiglesias
- Toxicology Unit, Psychobiology Department, University of A Coruña, Edificio de Servicios Centrales de Investigación, Campus Elviña s/n, 15071 A Coruña, Spain
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20
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Wen H, Li Y, Malek SN, Kim YC, Xu J, Chen P, Xiao F, Huang X, Zhou X, Xuan Z, Mankala S, Hou G, Rowley JD, Zhang MQ, Wang SM. New fusion transcripts identified in normal karyotype acute myeloid leukemia. PLoS One 2012; 7:e51203. [PMID: 23251452 PMCID: PMC3520980 DOI: 10.1371/journal.pone.0051203] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 10/29/2012] [Indexed: 11/19/2022] Open
Abstract
Genetic aberrations contribute to acute myeloid leukemia (AML). However, half of AML cases do not contain the well-known aberrations detectable mostly by cytogenetic analysis, and these cases are classified as normal karyotype AML. Different outcomes of normal karyotype AML suggest that this subgroup of AML could be genetically heterogeneous. But lack of genetic markers makes it difficult to further study this subgroup of AML. Using paired-end RNAseq method, we performed a transcriptome analysis in 45 AML cases including 29 normal karyotype AML, 8 abnormal karyotype AML and 8 AML without karyotype informaiton. Our study identified 134 fusion transcripts, all of which were formed between the partner genes adjacent in the same chromosome and distributed at different frequencies in the AML cases. Seven fusions are exclusively present in normal karyotype AML, and the rest fusions are shared between the normal karyotype AML and abnormal karyotype AML. CIITA, a master regulator of MHC class II gene expression and truncated in B-cell lymphoma and Hodgkin disease, is found to fuse with DEXI in 48% of normal karyotype AML cases. The fusion transcripts formed between adjacent genes highlight the possibility that certain such fusions could be involved in oncological process in AML, and provide a new source to identify genetic markers for normal karyotype AML.
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Affiliation(s)
- Hongxiu Wen
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Yongjin Li
- Department of Molecular and Cell Biology, The University of Texas at Dallas, Richardson, Texas, United States of America
| | - Sami N. Malek
- Department of Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, United States of America
| | - Yeong C. Kim
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Jia Xu
- Institute of Experimental Nuclear Medicine, Shandong University School of Medicine, Jinan, China
| | - Peixian Chen
- Department of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Fengxia Xiao
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Xin Huang
- School of Medicine, New York Medical College, New York, United States of America
| | - Xianzheng Zhou
- School of Medicine, New York Medical College, New York, United States of America
| | - Zhenyu Xuan
- Department of Molecular and Cell Biology, The University of Texas at Dallas, Richardson, Texas, United States of America
| | - Shiva Mankala
- Department of Molecular and Cell Biology, The University of Texas at Dallas, Richardson, Texas, United States of America
| | - Guihua Hou
- Institute of Experimental Nuclear Medicine, Shandong University School of Medicine, Jinan, China
| | - Janet D. Rowley
- Department of Medicine, University of Chicago Medical Center, Chicago, Illinois, United States of America
| | - Michael Q. Zhang
- Department of Molecular and Cell Biology, The University of Texas at Dallas, Richardson, Texas, United States of America
| | - San Ming Wang
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- Eppley Cancer Institute, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- * E-mail:
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Dalal BI, Mansoor S, Manna M, Pi S, Sauro GD, Hogge DE. Detection of CD34, TdT, CD56, CD2, CD4, and CD14 by Flow Cytometry Is Associated With NPM1 and FLT3 Mutation Status in Cytogenetically Normal Acute Myeloid Leukemia. Clinical Lymphoma Myeloma and Leukemia 2012; 12:274-9. [DOI: 10.1016/j.clml.2012.01.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Revised: 12/20/2011] [Accepted: 01/09/2012] [Indexed: 11/22/2022]
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Tiberio P, Cavadini E, Callari M, Daidone MG, Appierto V. AF1q: a novel mediator of basal and 4-HPR-induced apoptosis in ovarian cancer cells. PLoS One 2012; 7:e39968. [PMID: 22761939 PMCID: PMC3383705 DOI: 10.1371/journal.pone.0039968] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Accepted: 06/05/2012] [Indexed: 12/12/2022] Open
Abstract
Background Fenretinide (4-HPR) is a synthetic retinoid that exhibits potent antitumor and chemopreventive activities against different malignancies, including ovarian tumors. We previously showed that in ovarian cancer cells, 4-HPR induces apoptosis through a signaling cascade starting from reactive oxygen species (ROS) generation and involving endoplasmic reticulum (ER) stress response, Jun N-terminal Kinase (JNK) activation, and induction of the proapoptotic PLAcental Bone morphogenetic protein (PLAB). Since recent studies have shown that the oncogene ALL1-fused from chromosome 1q (AF1q), a retinoic acid target gene, is implicated in apoptosis induction by several therapeutic agents, we investigated its possible involvement in the apoptosis induced by 4-HPR in ovarian cancer cells. Methodology/Principal Findings Protein expression analysis, performed in ovarian cancer cells and extended to other histotypes (breast, neuroblastoma, and cervical), revealed that 4-HPR enhanced AF1q expression in cancer cells sensitive to the retinoid but not in resistant cells. Through gene silencing, AF1q was found functionally involved in 4-HPR-induced apoptosis in A2780, an ovarian cancer cell line highly sensitive to retinoid growth inhibitory and apoptotic effects. Inhibition of the signaling intermediates of the 4-HPR apoptotic cascade showed that AF1q upregulation was depended on prior generation of ROS, induction of ER stress response, JNK activation, and PLAB upmodulation. Finally, we found that direct overexpression of AF1q, in the absence of external stimuli, increased apoptosis in ovarian cancer cell lines. Conclusions/Significance The study expands the knowledge of the 4-HPR mechanism of action, which has not yet been completely elucidated, identifying AF1q as a novel mediator of retinoid anticancer activity. In addition, we demonstrate, for the first time, that AF1q plays a role in the onset of basal apoptosis in ovarian cancer cells, thus providing new information about the activity of this protein whose biologic functions are mostly unknown.
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Affiliation(s)
- Paola Tiberio
- Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.
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23
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Egan JB, Shi CX, Tembe W, Christoforides A, Kurdoglu A, Sinari S, Middha S, Asmann Y, Schmidt J, Braggio E, Keats JJ, Fonseca R, Bergsagel PL, Craig DW, Carpten JD, Stewart AK. Whole-genome sequencing of multiple myeloma from diagnosis to plasma cell leukemia reveals genomic initiating events, evolution, and clonal tides. Blood 2012; 120:1060-6. [PMID: 22529291 DOI: 10.1182/blood-2012-01-405977] [Citation(s) in RCA: 328] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The longitudinal evolution of a myeloma genome from diagnosis to plasma cell leukemia has not previously been reported. We used whole-genome sequencing (WGS) on 4 purified tumor samples and patient germline DNA drawn over a 5-year period in a t(4;14) multiple myeloma patient. Tumor samples were acquired at diagnosis, first relapse, second relapse, and end-stage secondary plasma cell leukemia (sPCL). In addition to the t(4;14), all tumor time points also shared 10 common single-nucleotide variants (SNVs) on WGS comprising shared initiating events. Interestingly, we observed genomic sequence variants that waxed and waned with time in progressive tumors, suggesting the presence of multiple independent, yet related, clones at diagnosis that rose and fell in dominance. Five newly acquired SNVs, including truncating mutations of RB1 and ZKSCAN3, were observed only in the final sPCL sample suggesting leukemic transformation events. This longitudinal WGS characterization of the natural history of a high-risk myeloma patient demonstrated tumor heterogeneity at diagnosis with shifting dominance of tumor clones over time and has also identified potential mutations contributing to myelomagenesis as well as transformation from myeloma to overt extramedullary disease such as sPCL.
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Ghanem H, Tank N, Tabbara IA. Prognostic implications of genetic aberrations in acute myelogenous leukemia with normal cytogenetics. Am J Hematol 2012; 87:69-77. [PMID: 22072438 DOI: 10.1002/ajh.22197] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 09/07/2011] [Accepted: 09/16/2011] [Indexed: 11/06/2022]
Abstract
Acute myelogenous leukemia (AML) is a genetically heterogeneous disease in which somatic mutations, that disturb cellular growth, proliferation, and differentiation, accumulate in hematopoietic progenitor cells. Cytogenetic findings, at diagnosis, have been proven to be one of the most important prognostic indicators in AML. About half of the patients with AML are found to have "normal" cytogenetic analysis by standard culture techniques. These patients are considered as an intermediate risk group. Cytogenetically normal AML (CN-AML) is the largest cytogenetic risk group, and the variation in clinical outcome of patients in this group is greater than in any other cytogenetic group. Besides mutation testing, age and presenting white blood cell count are important predictors of overall survival, suggesting that other factors independent of cytogenetic abnormalities, contribute to the outcome of patients with AML. The expanding knowledge at the genetic and molecular levels is helping define several subgroups of patients with CN-AML with variable prognosis. In this review, we describe the clinical and prognostic characteristics of CN-AML patients as a group, as well as the various molecular and genetic aberrations detected in these patients and their clinical and prognostic implications.
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Affiliation(s)
- Hady Ghanem
- Division of Hematology/Oncology, The George Washington University Medical Center, Washington, District of Columbia, USA
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Xiong Y, Li Z, Ji M, Tan AC, Bemis J, Tse JV, Huang G, Park J, Ji C, Chen J, Bemis LT, Bunting KD, Tse W. MIR29B regulates expression of MLLT11 (AF1Q), an MLL fusion partner, and low MIR29B expression associates with adverse cytogenetics and poor overall survival in AML. Br J Haematol 2011; 153:753-7. [PMID: 21496004 DOI: 10.1111/j.1365-2141.2011.08662.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
MLLT11, an MLL fusion partner, is a poor prognostic biomarker for paediatric acute myeloid leukaemia (AML), adult normal cytogenetics AML, and adult myelodysplastic syndrome. MLLT11 is highly regulated during haematopoietic progenitor differentiation and development but its regulatory mechanisms have not been defined. In this study, we demonstrate by transfection experiments that MIR29B directly regulates MLLT11 expression in vitro. MIR29B expression level was also inversely related to MLLT11 expression in a cohort of 56 AML patients (P<0·05). AML patients with low MIR29B/elevated MLLT11 expression had poor overall survival (P=0·038). Therefore, MIR29B may be a potential prognostic biomarker for AML patients.
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Affiliation(s)
- Yin Xiong
- University of Colorado Cancer Center, University of Colorado-Denver, Aurora, CO, USA
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