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Cho CH, Deyneko IV, Cordova-Martinez D, Vazquez J, Maguire AS, Diaz JR, Carbonell AU, Tindi JO, Cui MH, Fleysher R, Molholm S, Lipton ML, Branch CA, Hodgson L, Jordan BA. ANKS1B encoded AIDA-1 regulates social behaviors by controlling oligodendrocyte function. Nat Commun 2023; 14:8499. [PMID: 38129387 PMCID: PMC10739966 DOI: 10.1038/s41467-023-43438-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 11/09/2023] [Indexed: 12/23/2023] Open
Abstract
Heterozygous deletions in the ANKS1B gene cause ANKS1B neurodevelopmental syndrome (ANDS), a rare genetic disease characterized by autism spectrum disorder (ASD), attention deficit/hyperactivity disorder, and speech and motor deficits. The ANKS1B gene encodes for AIDA-1, a protein that is enriched at neuronal synapses and regulates synaptic plasticity. Here we report an unexpected role for oligodendroglial deficits in ANDS pathophysiology. We show that Anks1b-deficient mouse models display deficits in oligodendrocyte maturation, myelination, and Rac1 function, and recapitulate white matter abnormalities observed in ANDS patients. Selective loss of Anks1b from the oligodendrocyte lineage, but not from neuronal populations, leads to deficits in social preference and sensory reactivity previously observed in a brain-wide Anks1b haploinsufficiency model. Furthermore, we find that clemastine, an antihistamine shown to increase oligodendrocyte precursor cell maturation and central nervous system myelination, rescues deficits in social preference in 7-month-old Anks1b-deficient mice. Our work shows that deficits in social behaviors present in ANDS may originate from abnormal Rac1 activity within oligodendrocytes.
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Affiliation(s)
- Chang Hoon Cho
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
- Human Pathobiology and OMNI Reverse Translation, Genentech, Inc., San Francisco, CA, USA
| | - Ilana Vasilisa Deyneko
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Dylann Cordova-Martinez
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Juan Vazquez
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Anne S Maguire
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Jenny R Diaz
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Abigail U Carbonell
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Jaafar O Tindi
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Min-Hui Cui
- Department of Radiology, Albert Einstein College of Medicine, Bronx, NY, USA
- Gruss Magnetic Resonance Research Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Roman Fleysher
- Department of Radiology, Albert Einstein College of Medicine, Bronx, NY, USA
- Gruss Magnetic Resonance Research Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Sophie Molholm
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Psychiatry and Behavioral Sciences, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Michael L Lipton
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Radiology, Albert Einstein College of Medicine, Bronx, NY, USA
- Gruss Magnetic Resonance Research Center, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Psychiatry and Behavioral Sciences, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Craig A Branch
- Department of Radiology, Albert Einstein College of Medicine, Bronx, NY, USA
- Gruss Magnetic Resonance Research Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Louis Hodgson
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
- Gruss-Lipper Biophotonics Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Bryen A Jordan
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA.
- Department of Psychiatry and Behavioral Sciences, Albert Einstein College of Medicine, Bronx, NY, USA.
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2
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Li M, Shen Y, Chen Y, Gao H, Zhou J, Wang Q, Fan C, Zhang W, Li J, Cong H, Gu J, Gan Y, Tu H. Characterization of hepatitis B virus infection and viral DNA integration in non-Hodgkin lymphoma. Int J Cancer 2020; 147:2199-2209. [PMID: 32350851 DOI: 10.1002/ijc.33027] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/02/2020] [Accepted: 04/17/2020] [Indexed: 12/12/2022]
Abstract
Hepatitis B virus (HBV) infection has been reported to be associated with non-Hodgkin lymphoma (NHL). However, the evidence is limited to the seroepidemiological study. There is a lack of evidence showing the HBV infection and integration in NHL cells. Here, we reported that in the Shanghai area, the positive rates of serum HBsAg (OR: 3.11; 95% CI: 2.20-4.41) and HBeAg (OR: 3.99; 95% CI: 1.73-9.91) were significantly higher in patients with NHL. HBsAg, HBcAg and HBV DNA were detected in 34.4%, 45.2% and 47.0% of the NHL tissues, respectively. Furthermore, by using a high-throughput viral integration detection approach (HIVID), integrated HBV DNA was identified from 50% (6/12) HBV-related NHL tissues. There were a total of 313 HBV integration sites isolated from the NHL tissues, among which four protein-coding genes (FAT2, SETX, ITGA10 and CD63) were interrupted by HBV DNA in their exons. Seven HBV preferential target genes (ANKS1B, HDAC4, EGFLAM, MAN1C1, XKR6, ZBTB38 and CCDC91) showed significantly altered expression levels in NHL, suggesting a potential role of these genes in NHL development. Taken together, HBV integration is a common phenomenon in NHL. This finding opens up a new direction of research into the mechanistic link between HBV infection and NHL.
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Affiliation(s)
- Mengge Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuling Shen
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Head and Neck Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiming Chen
- Department of Pathology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haifeng Gao
- Department of Immunology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Jiaqin Zhou
- Department of Head and Neck Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qing Wang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chunsun Fan
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of etiology, Qidong People's Hospital/Qidong Liver Cancer Institute, Qidong, China
| | - Wei Zhang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jin Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Cong
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jinyang Gu
- Department of Transplantation, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Gan
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hong Tu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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3
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Kaito S, Najima Y, Harada K, Fukuda T, Noguchi Y, Ikegame K, Tanaka M, Ozawa Y, Yoshida S, Sawa M, Ota S, Inoue Y, Tanaka J, Ichinohe T, Atsuta Y, Kako S. Allogeneic hematopoietic stem cell transplantation for adult patients with B-cell acute lymphoblastic leukemia harboring t(1;19)(q23;p13.3); comparison with normal karyotype. Bone Marrow Transplant 2020; 55:1337-1346. [PMID: 32042105 DOI: 10.1038/s41409-020-0816-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 01/16/2020] [Accepted: 01/27/2020] [Indexed: 11/09/2022]
Abstract
There are few reports on allogeneic hematopoietic stem cell transplantation (allo-HSCT) for adult B-cell acute lymphoblastic leukemia (B-ALL) harboring t(1;19)(q23;p13.3). We used nationwide registry data of Japan for 2003-2016 to evaluate transplant outcomes and clarified prognostic factors among adult allo-HSCT recipients with B-ALL harboring t(1;19)(q23;p13.3) (n = 125). Compared with cytogenetically normal (CN) B-ALL patients (n = 1057), their 3-year overall survival (OS) rates were comparable (55.4% for t(1;19) and 54.4% for CN; P = 0.76). Considering only patients in first complete hematological remission (CR1), the 3-year OS rates remained comparable (70.5% for t(1;19) and 67.8% for CN; P = 0.86). For t(1;19) patients in CR1, minimal residual disease (MRD) at transplantation was associated with relatively worse outcomes. The 3-year OS rates were 43.6% for patients with MRD and 77.4% for those without it (P = 0.016). The 3-year relapse rates were 54.5% for patients with MRD and 12.8% for those without it (P < 0.001). Multivariate analyses revealed that MRD at transplantation was a significant risk factor for OS and relapse. In the high-intensity chemotherapy era, t(1;19)(q23;p13.3) did not have a poorer posttransplant prognosis than the normal karyotype. However, even for patients in CR1, MRD at transplantation was associated with comparatively worse OS and higher relapse rates.
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Affiliation(s)
- Satoshi Kaito
- Hematology Division, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo, Japan.
| | - Yuho Najima
- Hematology Division, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo, Japan
| | - Kaito Harada
- Department of Hematology and Oncology, Tokai University School of Medicine, Isehara, Japan
| | - Takahiro Fukuda
- Department of Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan
| | - Yuma Noguchi
- Hematology Division, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo, Japan
| | - Kazuhiro Ikegame
- Division of Hematology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Masatsugu Tanaka
- Department of Hematology, Kanagawa Cancer Center, Yokohama, Japan
| | - Yukiyasu Ozawa
- Department of Hematology, Japanese Red Cross Nagoya First Hospital, Nagoya, Japan
| | - Shuro Yoshida
- Department of Hematology, Hamanomachi Hospital, Fukuoka, Japan
| | - Masashi Sawa
- Department of Hematology and Oncology, Anjo Kosei Hospital, Anjo, Japan
| | - Shuichi Ota
- Department of Hematology, Sapporo Hokuyu Hospital, Sapporo, Japan
| | - Yoshiko Inoue
- Department of Hematology, National Hospital Organization Kumamoto Medical Center, Kumamoto, Japan
| | - Junji Tanaka
- Department of Hematology, Tokyo Women's Medical University, Tokyo, Japan
| | - Tatsuo Ichinohe
- Department of Hematology and Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Yoshiko Atsuta
- Japanese Data Center for Hematopoietic Cell Transplantation, Nagoya, Japan.,Department of Healthcare Administration, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinichi Kako
- Division of Hematology, Saitama Medical Center, Jichi Medical University, Saitama, Japan
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4
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Liu R, Chen Z, Wang S, Zhao G, Gu Y, Han Q, Chen B. Screening of key genes associated with R‑CHOP immunochemotherapy and construction of a prognostic risk model in diffuse large B‑cell lymphoma. Mol Med Rep 2019; 20:3679-3690. [PMID: 31485671 PMCID: PMC6755150 DOI: 10.3892/mmr.2019.10627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 07/25/2019] [Indexed: 11/30/2022] Open
Abstract
Diffuse large B-cell lymphoma (DLBCL) is a common subtype of non-Hodgkin lymphoma, which is curable in the majority of patients treated with rituximab plus cyclophosphamide, doxorubicin, vincristine and prednisone (R-CHOP) immunochemotherapy. However, the therapeutic mechanism of R-CHOP has not been elucidated. The GSE32918 and GSE57611 datasets were retrieved from The Gene Expression Omnibus database. The differentially expressed genes (DEGs) associated with R-CHOP therapy were identified using limma. Combined with prognostic information in GSE32918, DEGs found to be significantly associated with prognosis were selected using univariate Cox regression analysis and a risk prediction model was constructed. Based on this model, the samples in the training set (GSE32918) were divided into high and low risk score groups according to the median risk score. A total of 801 DEGs were identified between the R-CHOP treated DLBCL and primary DLBCL samples, from this 116 prognosis-associated genes were selected. Using Cox proportional hazards model, an optimal combination of 12 genes [including calcium/calmodulin dependent protein kinase I (CAMK1), hippocalcin like 4 (HPCAL4) and ephrin A5 (EFNA5)] was selected, and the sample risk score prediction model was constructed and validated. The DEGs between high risk score and low risk score groups were significantly enriched in functions associated with ‘response to DNA damage stimulus’, and pathways including ‘cytokine-cytokine receptor interaction’ and ‘cell cycle’. The optimal combination of the 12 genes, including CAMK1, HPCAL4 and EFNA5, was found to be useful in predicting the prognosis of patients with DLBCL after R-CHOP treatment. Therefore, these genes may be affected by R-CHOP in DLBCL.
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Affiliation(s)
- Ran Liu
- Department of Hematology and Oncology, Zhongda Hospital Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Zhi Chen
- Department of Cardiology, Jiangsu Province Hospital, Nanjing, Jiangsu 210009, P.R. China
| | - Shujun Wang
- Department of Blood Transfusion, Nanjing General Hospital of PLA, Nanjing, Jiangsu 210009, P.R. China
| | - Gang Zhao
- Department of Hematology and Oncology, Zhongda Hospital Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Yan Gu
- Department of Hematology and Oncology, Zhongda Hospital Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Qi Han
- Department of Hematology and Oncology, Zhongda Hospital Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Baoan Chen
- Department of Hematology and Oncology, Zhongda Hospital Southeast University, Nanjing, Jiangsu 210009, P.R. China
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5
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Younis RM, Taylor RM, Beardsley PM, McClay JL. The ANKS1B gene and its associated phenotypes: focus on CNS drug response. Pharmacogenomics 2019; 20:669-684. [PMID: 31250731 PMCID: PMC6912848 DOI: 10.2217/pgs-2019-0015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Accepted: 04/26/2019] [Indexed: 12/21/2022] Open
Abstract
The ANKS1B gene was a top finding in genome-wide association studies (GWAS) of antipsychotic drug response. Subsequent GWAS findings for ANKS1B include cognitive ability, educational attainment, body mass index, response to corticosteroids and drug dependence. We review current human association evidence for ANKS1B, in addition to functional studies that include two published mouse knockouts. The several GWAS findings in humans indicate that phenotypically relevant variation is segregating at the ANKS1B locus. ANKS1B shows strong plausibility for involvement in CNS drug response because it encodes a postsynaptic effector protein that mediates long-term changes to neuronal biology. Forthcoming data from large biobanks should further delineate the role of ANKS1B in CNS drug response.
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Affiliation(s)
- Rabha M Younis
- Department of Pharmacotherapy & Outcomes Science, Virginia Commonwealth University School of Pharmacy, Richmond, VA 23298, USA
| | - Rachel M Taylor
- Center for Military Psychiatry & Neuroscience, Walter Reed Army Institute of Research, Silver Spring, MA 20910, USA
| | - Patrick M Beardsley
- Department of Pharmacology & Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298, USA
- Center for Biomarker Research & Personalized Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Joseph L McClay
- Department of Pharmacotherapy & Outcomes Science, Virginia Commonwealth University School of Pharmacy, Richmond, VA 23298, USA
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6
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Fernandez AGL, Crescenzi B, Pierini V, Di Battista V, Barba G, Pellanera F, Di Giacomo D, Roti G, Piazza R, Adelman ER, Figueroa ME, Mecucci C. A distinct epigenetic program underlies the 1;7 translocation in myelodysplastic syndromes. Leukemia 2019; 33:2481-2494. [PMID: 30923319 DOI: 10.1038/s41375-019-0433-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 12/23/2018] [Accepted: 02/08/2019] [Indexed: 02/06/2023]
Abstract
The unbalanced translocation dic(1;7)(q10;p10) in myelodysplastic syndromes (MDS) is originated by centromeric juxtaposition resulting into 1q trisomy and 7q monosomy. More than half of cases arise after chemo/radio-therapy. To date, given the absence of genes within the centromeric regions, no specific molecular events have been identified in this cytogenetic subgroup. We performed the first comprehensive genetic and epigenetic analysis of MDS with dic(1;7)(q10;p10) compared to normal controls and therapy-related myeloid neoplasms (t-MNs). RNA-seq showed a unique downregulated signature in dic(1;7) cases, affecting more than 80% of differentially expressed genes. As revealed by pathway and gene ontology analyses, downregulation of ATP-binding cassette (ABC) transporters and lipid-related genes and upregulation of p53 signaling were the most relevant biological features of dic(1;7). Epigenetic supervised analysis revealed hypermethylation at intronic enhancers in the dicentric subgroup, in which low expression levels of enhancer putative target genes accounted for around 35% of the downregulated signature. Enrichment of Krüppel-like transcription factor binding sites emerged at enhancers. Furthermore, a specific hypermethylated pattern on 1q was found to underlie the hypo-expression of more than 50% of 1q-deregulated genes, despite trisomy. In summary, dic(1;7) in MDS establishes a specific transcriptional program driven by a unique epigenomic signature.
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Affiliation(s)
| | - Barbara Crescenzi
- Department of Medicine, Hematology and Bone Marrow Transplantation Unit, University of Perugia, Perugia, Italy
| | - Valentina Pierini
- Department of Medicine, Hematology and Bone Marrow Transplantation Unit, University of Perugia, Perugia, Italy
| | - Valeria Di Battista
- Department of Medicine, Hematology and Bone Marrow Transplantation Unit, University of Perugia, Perugia, Italy
| | - Gianluca Barba
- Department of Medicine, Hematology and Bone Marrow Transplantation Unit, University of Perugia, Perugia, Italy
| | - Fabrizia Pellanera
- Department of Medicine, Hematology and Bone Marrow Transplantation Unit, University of Perugia, Perugia, Italy
| | - Danika Di Giacomo
- Department of Medicine, Hematology and Bone Marrow Transplantation Unit, University of Perugia, Perugia, Italy
| | | | - Rocco Piazza
- Hematology, School of Medicine and Surgery, University of Milano Bicocca, Milano, Italy
| | - Emmalee R Adelman
- Sylvester Comprehensive Cancer Center and Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Maria E Figueroa
- Sylvester Comprehensive Cancer Center and Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Cristina Mecucci
- Department of Medicine, Hematology and Bone Marrow Transplantation Unit, University of Perugia, Perugia, Italy.
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7
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Enga RM, Rice AC, Weller P, Subler MA, Lee D, Hall CP, Windle JJ, Beardsley PM, van den Oord EJ, McClay JL. Initial characterization of behavior and ketamine response in a mouse knockout of the post-synaptic effector gene Anks1b. Neurosci Lett 2017; 641:26-32. [PMID: 28115237 DOI: 10.1016/j.neulet.2017.01.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 01/13/2017] [Accepted: 01/17/2017] [Indexed: 12/19/2022]
Abstract
The human ANKS1B gene encodes an activity-dependent effector of post-synaptic signaling. It was recently associated with neuropsychiatric phenotypes in genome-wide studies. While the biological function of ANKS1B has been partly elucidated, its role in behavior is poorly understood. Here, we breed and characterize a full knockout (KO) for murine Anks1b. We found that the homozygous KO genotype was partially lethal, showing significant deviation from expected segregation ratios at weaning. Behaviorally, KOs exhibited no difference in baseline acoustic startle response, but showed deficits in prepulse inhibition (PPI). KOs also exhibited locomotor hyperactivity and increased stereotypy at baseline. Administration of ketamine, a non-competitive NMDA-receptor antagonist, greatly exacerbated locomotor activity in the KOs at lower doses, but genotype groups were almost indistinguishable as dose increased. Stereotypy showed a complex response to ketamine in the KOs, with elevated stereotypy at lower doses and markedly less at high doses, compared to wild type. Our study is the first to probe the behavioral phenotypes associated with ablation of Anks1b. Deficits in PPI, locomotor hyperactivity, elevated stereotypy and altered response to NMDA receptor antagonism are murine behavioral outcomes with translational relevance for psychiatric disorders. These findings are also consistent with the role of Anks1b as an effector of glutamatergic signaling. As an intermediary between post-synaptic receptor stimulation and long-term changes to neuronal protein expression, further investigation of Anks1b is warranted.
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Affiliation(s)
- Rachel M Enga
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, USA
| | - Ann C Rice
- Department of Neurology, Virginia Commonwealth University, Richmond, VA, USA
| | - Pamela Weller
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Mark A Subler
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Daiyoon Lee
- Department of Pharmacotherapy and Outcomes Science, Virginia Commonwealth University, Richmond, VA, USA
| | - Chelsea P Hall
- Department of Pharmacotherapy and Outcomes Science, Virginia Commonwealth University, Richmond, VA, USA
| | - Jolene J Windle
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
| | - Patrick M Beardsley
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, USA; Center for Biomarker Research and Precision Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Edwin J van den Oord
- Center for Biomarker Research and Precision Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Joseph L McClay
- Department of Pharmacotherapy and Outcomes Science, Virginia Commonwealth University, Richmond, VA, USA.
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8
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ANKS1B Interacts with the Cerebral Cavernous Malformation Protein-1 and Controls Endothelial Permeability but Not Sprouting Angiogenesis. PLoS One 2015; 10:e0145304. [PMID: 26698571 PMCID: PMC4699217 DOI: 10.1371/journal.pone.0145304] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 12/02/2015] [Indexed: 11/19/2022] Open
Abstract
Cerebral cavernous malformations are fragile blood vessel conglomerates in the central nervous system that are caused by mutations in the CCM1/KRIT1, CCM2 or CCM3 genes. The gene products form a protein complex at adherens junctions and loss of either CCM protein disrupts endothelial cell quiescence leading to increased permeability and excessive angiogenesis. We performed a yeast 2-hybrid screen to identify novel proteins directly interacting with KRIT1. The ankyrin repeat and sterile alpha motif domain-containing protein 1B (ANKS1B) was identified as a novel binding partner of KRIT1. Silencing of ANKS1B or the related gene ANKS1A in primary human endothelial cells had no significant effects on cellular proliferation, migration and sprouting angiogenesis. However, silencing of ANKS1B expression disturbed endothelial cell barrier functions leading to increased permeability. Forced ANKS1B expression reduced permeability. This was independent of Rho kinase activity and the presence of KRIT1. Taken together, ANKS1B was identified as a novel KRIT1-interacting protein that selectively controls endothelial permeability but not angiogenesis.
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9
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Holmlund T, Lindberg MJ, Grander D, Wallberg AE. GCN5 acetylates and regulates the stability of the oncoprotein E2A-PBX1 in acute lymphoblastic leukemia. Leukemia 2012; 27:578-85. [PMID: 23044487 DOI: 10.1038/leu.2012.265] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The t(1;19) translocation in pediatric pre-B-cell acute lymphoblastic leukemia (ALL) fuses the genes, which encode the transcriptional activator E2A and homeobox pre-B-cell leukemia transcription factor 1 (PBX1), resulting in expression of the chimeric transcription factor E2A-PBX1. E2A-PBX1 can promote cell transformation both in vitro and in vivo; however, the mechanisms by which E2A-PBX1 contributes to malignancy merit further investigation. In the current work we report, for the first time, a physical and functional interaction between the SPT3-TAFII31-GCN5L acetylase (STAGA) complex and E2A-PBX1. STAGA, and its acetyltransferase subunit GCN5, directly interacted with the E2A portion of E2A-PBX1. GCN5 acetylated E2A-PBX1 and increased the stability of E2A-PBX1 protein in cells. Moreover, the GCN5 inhibitor α-methylene-γ-butyrolactone 3 (MB-3) decreased E2A-PBX1 acetylation and E2A-PBX1 protein levels in leukemic cells, indicating that GCN5 inhibitors have potential value as therapeutic agents for ALL. In addition, we show that the E3 ubiquitin ligase HDM2 potentiates the degradation of E2A-PBX1. We suggest that dynamic regulation of E2A-PBX1 protein levels in vivo has a fundamental role in ALL.
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Affiliation(s)
- T Holmlund
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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10
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Pansuriya TC, Oosting J, Krenács T, Taminiau AHM, Verdegaal SHM, Sangiorgi L, Sciot R, Hogendoorn PCW, Szuhai K, Bovée JVMG. Genome-wide analysis of Ollier disease: Is it all in the genes? Orphanet J Rare Dis 2011; 6:2. [PMID: 21235737 PMCID: PMC3027091 DOI: 10.1186/1750-1172-6-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Accepted: 01/14/2011] [Indexed: 01/06/2023] Open
Abstract
Background Ollier disease is a rare, non-hereditary disorder which is characterized by the presence of multiple enchondromas (ECs), benign cartilaginous neoplasms arising within the medulla of the bone, with an asymmetric distribution. The risk of malignant transformation towards central chondrosarcoma (CS) is increased up to 35%. The aetiology of Ollier disease is unknown. Methods We undertook genome-wide copy number and loss of heterozygosity (LOH) analysis using Affymetrix SNP 6.0 array on 37 tumours of 28 Ollier patients in combination with expression array using Illumina BeadArray v3.0 for 7 ECs of 6 patients. Results Non-recurrent EC specific copy number alterations were found at FAM86D, PRKG1 and ANKS1B. LOH with copy number loss of chromosome 6 was found in two ECs from two unrelated Ollier patients. One of these patients also had LOH at chromosome 3. However, no common genomic alterations were found for all ECs. Using an integration approach of SNP and expression array we identified loss as well as down regulation of POU5F1 and gain as well as up regulation of NIPBL. None of these candidate regions were affected in more than two Ollier patients suggesting these changes to be random secondary events in EC development. An increased number of genetic alterations and LOH were found in Ollier CS which mainly involves chromosomes 9p, 6q, 5q and 3p. Conclusions We present the first genome-wide analysis of the largest international series of Ollier ECs and CS reported so far and demonstrate that copy number alterations and LOH are rare and non-recurrent in Ollier ECs while secondary CS are genetically unstable. One could predict that instead small deletions, point mutations or epigenetic mechanisms play a role in the origin of ECs of Ollier disease.
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Affiliation(s)
- Twinkal C Pansuriya
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
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11
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McClay JL, Adkins DE, Aberg K, Stroup S, Perkins DO, Vladimirov VI, Lieberman JA, Sullivan PF, van den Oord EJCG. Genome-wide pharmacogenomic analysis of response to treatment with antipsychotics. Mol Psychiatry 2011; 16:76-85. [PMID: 19721433 PMCID: PMC2888895 DOI: 10.1038/mp.2009.89] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Revised: 05/29/2009] [Accepted: 07/27/2009] [Indexed: 12/25/2022]
Abstract
Schizophrenia is an often devastating neuropsychiatric illness. Understanding the genetic variation affecting response to antipsychotics is important to develop novel diagnostic tests to match individual schizophrenia patients to the most effective and safe medication. In this study, we use a genome-wide approach to detect genetic variation underlying individual differences in response to treatment with the antipsychotics olanzapine, quetiapine, risperidone, ziprasidone and perphenazine. Our sample consisted of 738 subjects with DSM-IV schizophrenia who took part in the Clinical Antipsychotic Trials of Intervention Effectiveness. Subjects were genotyped using the Affymetrix 500 K genotyping platform plus a custom 164 K chip to improve genome-wide coverage. Treatment outcome was measured using the Positive and Negative Syndrome Scale. Our criterion for genome-wide significance was a prespecified threshold that ensures that, on an average, only 10% of the significant findings are false discoveries. The top statistical result reached significance at our prespecified threshold and involved a single-nucleotide polymorphism (SNP) in an intergenic region on chromosome 4p15. In addition, SNPs in Ankyrin Repeat and Sterile Alpha Motif Domain-Containing Protein 1B (ANKS1B) and in the Contactin-Associated Protein-Like 5 gene (CNTNAP5), which mediated the effects of olanzapine and risperidone on Negative symptoms, were very close to our threshold for declaring significance. The most significant SNP in CNTNAP5 is nonsynonymous, giving rise to an amino-acid substitution. In addition to highlighting our top results, we provide all P-values for download as a resource for investigators with the requisite samples to carry out replication. This study demonstrates the potential of genome-wide association studies to discover novel genes that mediate the effects of antipsychotics, which could eventually help to tailor drug treatment to schizophrenic patients.
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Affiliation(s)
- J L McClay
- Center for Biomarker Research and Personalized Medicine, School of Pharmacy, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA 23298, USA.
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Garg R, Kantarjian H, Thomas D, Faderl S, Ravandi F, Lovshe D, Pierce S, O'Brien S. Adults with acute lymphoblastic leukemia and translocation (1;19) abnormality have a favorable outcome with hyperfractionated cyclophosphamide, vincristine, doxorubicin, and dexamethasone alternating with methotrexate and high-dose cytarabine chemotherapy. Cancer 2009; 115:2147-54. [PMID: 19298009 DOI: 10.1002/cncr.24266] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Among the well described cytogenetic abnormalities in adults with acute lymphoblastic leukemia (ALL), a translocation involving chromosomes 1 and 19 (t[1;19] [q23;p13]) occurs in a small subset but has been associated variously with an intermediate prognosis or a bad prognosis in different studies. METHODS Adults with ALL and t(1;19) who were treated at The University of Texas M. D. Anderson Cancer Center were reviewed. Their clinical features and outcomes were compared with those of patients who had other cytogenetic abnormalities. The study endpoints included the complete remission (CR) rate, the complete response duration (CRD), and overall survival (OS). RESULTS Of 411 adults with pre-B-cell ALL, 12 patients had t(1;19). Ten of 12 patients with t(1;19) received hyperfractionated cyclophosphamide, vincristine, doxorubicin (Adriamycin), and dexamethasone alternating with methotrexate and high-dose cytarabine (hyper-CVAD) chemotherapy; and the other 2 patients received combined vincristine, doxorubicin, and dexamethasone (VAD). All 12 patients achieved CR, and the 3-year survival rate was 73%. Patients with t(1;19) had significantly better CRD and OS compared with all other patients combined and compared individually with patients who had Philadelphia chromosome-positive, t(4;11), and lymphoma-like abnormalities (deletion 6q, addition q14q, t[11;14], and t[14;18]). CONCLUSIONS Adults with ALL and t(1;19) had an excellent prognosis when the received the hyper-CVAD regimen.
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Affiliation(s)
- Ravin Garg
- Department of Cancer Medicine, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, USA
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13
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Jordan BA, Fernholz BD, Khatri L, Ziff EB. Activity-dependent AIDA-1 nuclear signaling regulates nucleolar numbers and protein synthesis in neurons. Nat Neurosci 2007; 10:427-35. [PMID: 17334360 DOI: 10.1038/nn1867] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2006] [Accepted: 02/08/2007] [Indexed: 11/08/2022]
Abstract
Neuronal development, plasticity and survival require activity-dependent synapse-to-nucleus signaling. Most studies implicate an activity-dependent regulation of gene expression in this phenomenon. However, little is known about other nuclear functions that are regulated by synaptic activity. Here we show that a newly identified component of rat postsynaptic densities (PSDs), AIDA-1d, can regulate global protein synthesis by altering nucleolar numbers. AIDA-1d binds to the first two postsynaptic density-95/Discs large/zona occludens-1 (PDZ) domains of the scaffolding protein PSD-95 via its C-terminal three amino acids. Stimulation of NMDA receptors (NMDARs), which are also bound to PSD-95, results in a Ca2+-independent translocation of AIDA-1d to the nucleus, where it couples to Cajal bodies and induces Cajal body-nucleolar association. Long-term neuronal stimulation results in an AIDA-1-dependent increase in nucleolar numbers and protein synthesis. We propose that AIDA-1d mediates a link between synaptic activity and control of protein biosynthetic capacity by regulating nucleolar assembly.
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Affiliation(s)
- Bryen A Jordan
- Department of Biochemistry, New York University School of Medicine, 550 First Avenue, New York, New York 10016, USA.
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Mazieres J, You L, He B, Xu Z, Lee AY, Mikami I, McCormick F, Jablons DM. Inhibition of Wnt16 in human acute lymphoblastoid leukemia cells containing the t(1;19) translocation induces apoptosis. Oncogene 2005; 24:5396-400. [PMID: 16007226 DOI: 10.1038/sj.onc.1208568] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The Wnt family of secreted glycoproteins is widely involved in cell proliferation, differentiation and oncogenesis. Many Wnt signaling genes are upregulated and activated in chronic lymphocytic leukemia. Less is known concerning acute leukemia. One subtype of acute lymphoblastoid leukemia (ALL) is characterized by a t(1;19) chromosomal translocation resulting in a fusion protein E2A-Pbx1 that promotes transformation and leukemogenesis. Wnt16 has been shown to be targeted by E2A-Pbx1. We performed a differential gene expression array in acute leukemia cell lines displaying or not displaying the t(1;19) translocation. We found that Wnt16 and many Wnt signaling-related genes were upregulated in the translocation-containing cells. As two isoforms of Wnt16, Wnt16a and Wnt16b, have been recently identified, we demonstrated by using RT-PCR and Western blot that Wnt16b (and not Wnt16a) is overexpressed in t(1;19)-containing cell lines. We then directly addressed the role played by both isoforms in this type of leukemia. Using specific short interfering RNA (siRNA) and an anti-Wnt16 antibody, we showed that targeted-Wnt16b inhibition leads to apoptotic cell death. We also demonstrated that Wnt16b mediates its effect through the canonical Wnt pathway involving dishevelled-2, beta-catenin and survivin. We thus propose that Wnt16 plays an important role in leukemogenesis, raising its therapeutic interest.
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Affiliation(s)
- Julien Mazieres
- UCSF Comprehensive Cancer Center, San Francisco, CA 94115, USA
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15
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Xu H, Hebert MD. A novel EB-1/AIDA-1 isoform, AIDA-1c, interacts with the Cajal body protein coilin. BMC Cell Biol 2005; 6:23. [PMID: 15862129 PMCID: PMC1097723 DOI: 10.1186/1471-2121-6-23] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2005] [Accepted: 04/29/2005] [Indexed: 01/28/2023] Open
Abstract
Background Cajal bodies (CBs) are nuclear suborganelles that play a role in the biogenesis of small nuclear ribonucleoproteins (snRNPs), which are crucial for pre-mRNA splicing. Upon nuclear reentry, Sm-class snRNPs localize first to the CB, where the snRNA moiety of the snRNP is modified. It is not clear how snRNPs target to the CB and are released from this structure after their modification. Coilin, the CB marker protein, may participate in snRNP biogenesis given that it can interact with snRNPs and SMN. SMN is crucial for snRNP assembly and is the protein mutated in the neurodegenerative disease Spinal Muscular Atrophy. Coilin knockout mice display significant viability problems and altered CB formation. Thus characterization of the CB and its associated proteins will give insight into snRNP biogenesis and clarify the dynamic organization of the nucleus. Results In this report, we identify a novel protein isoform of EB-1/AIDA-1, termed AIDA-1c, that interacts with the CB marker protein, coilin. Northern and nested PCR experiments reveal that the AIDA-1c isoform is expressed in brain and several cancer cell lines. Competition binding experiments demonstrate that AIDA-1c competes with SmB' for coilin binding sites, but does not bind SMN. When ectopically expressed, AIDA-1c is predominantly nuclear with no obvious accumulations in CBs. Interestingly, another EB-1/AIDA-1 nuclear isoform, AIDA-1a, does not bind coilin in vivo as efficiently as AIDA-1c. Knockdown of EB-1/AIDA-1 isoforms by siRNA altered Cajal body organization and reduced cell viability. Conclusion These data suggest that specific EB-1/AIDA-1 isoforms, such as AIDA-1c, may participate in the regulation of nucleoplasmic coilin protein interactions in neuronal and transformed cells.
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Affiliation(s)
- Hongzhi Xu
- Department of Biochemistry, The University of Mississippi Medical Center Jackson, MS 39216-4505, USA
| | - Michael D Hebert
- Department of Biochemistry, The University of Mississippi Medical Center Jackson, MS 39216-4505, USA
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Ross ME, Zhou X, Song G, Shurtleff SA, Girtman K, Williams WK, Liu HC, Mahfouz R, Raimondi SC, Lenny N, Patel A, Downing JR. Classification of pediatric acute lymphoblastic leukemia by gene expression profiling. Blood 2003; 102:2951-9. [PMID: 12730115 DOI: 10.1182/blood-2003-01-0338] [Citation(s) in RCA: 464] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Contemporary treatment of pediatric acute lymphoblastic leukemia (ALL) requires the assignment of patients to specific risk groups. We have recently demonstrated that expression profiling of leukemic blasts can accurately identify the known prognostic subtypes of ALL, including T-cell lineage ALL (T-ALL), E2A-PBX1, TEL-AML1, MLL rearrangements, BCR-ABL, and hyperdiploid karyotypes with more than 50 chromosomes. As the next step toward developing this methodology into a frontline diagnostic tool, we have now analyzed leukemic blasts from 132 diagnostic samples using higher density oligonucleotide arrays that allow the interrogation of most of the identified genes in the human genome. Nearly 60% of the newly identified subtype discriminating genes are novel markers not identified in our previous study, and thus should provide new insights into the altered biology underlying these leukemias. Moreover, a proportion of the newly selected genes are highly ranked as class discriminators, and when incorporated into class-predicting algorithms resulted in an overall diagnostic accuracy of 97%. The performance of an array containing the identified discriminating genes should now be assessed in frontline clinical trials in order to determine the accuracy, practicality, and cost effectiveness of this methodology in the clinical setting.
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Affiliation(s)
- Mary E Ross
- Department of Hematology-Oncology, St Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA
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May P, Bock HH, Herz J. Integration of Endocytosis and Signal Transduction by Lipoprotein Receptors. Sci Signal 2003. [DOI: 10.1126/scisignal.1762003pe12] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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May P, Bock HH, Herz J. Integration of endocytosis and signal transduction by lipoprotein receptors. SCIENCE'S STKE : SIGNAL TRANSDUCTION KNOWLEDGE ENVIRONMENT 2003; 2003:PE12. [PMID: 12671190 DOI: 10.1126/stke.2003.176.pe12] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The members of the low density lipoprotein receptor (LDLR) gene family are cell surface molecules with diverse functions in cellular metabolism. All LDLR family members are endocytic receptors that mediate the uptake of extracellular cargo into the cell; recent research indicates that they also participate directly in signal transduction. Regulated proteolytic release of the intracellular domain of one of these lipoprotein receptors, the LDLR-related protein 1 (LRP1), has been described, along with the possible role of the released domain in transcriptional regulation. A recent study suggests that megalin, a member of the LDLR gene family that mediates the cellular uptake of vitamin D carrier protein, may also modulate vitamin D-related gene transcription through sequestration of a component of the vitamin D receptor transcriptional complex. May et al. discuss this research in the context of the integration of endocytosis and signaling by this receptor family.
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Affiliation(s)
- Petra May
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390-9046, USA
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Petersen HH, Hilpert J, Militz D, Zandler V, Jacobsen C, Roebroek AJM, Willnow TE. Functional interaction of megalin with the megalinbinding protein (MegBP), a novel tetratrico peptide repeat-containing adaptor molecule. J Cell Sci 2003; 116:453-61. [PMID: 12508107 DOI: 10.1242/jcs.00243] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Megalin is a member of the LDL receptor gene family that plays an important role in forebrain development and in cellular vitamin D metabolism through endocytic uptake of vitamin D metabolites. Similar to other receptors in this gene family, megalin is believed to functionally interact with intracellular proteins through adaptors that bind to the receptor tail and regulate its endocytic and signal transducing activities. Using yeast two-hybrid screens, we identified a novel scaffold protein with tetratrico peptide repeats, the megalin-binding protein (MegBP) that associates with the receptor. The binding site of MegBP was mapped to an N-terminal region on the receptor tail harboring a proline-rich peptide element. MegBP binding did not block the endocytic activity of the receptor; however, overexpression resulted in cellular lethality. In further screens, we identified proteins that bound to MegBP and thus might be recruited to the megalin tail. MegBP-interacting partners included several transcriptional regulators such as the SKI-interacting protein (SKIP), a co-activator of the vitamin D receptor. These finding suggest a model whereby megalin directly participates in transcriptional regulation through controlled sequestration or release of transcription factors via MegBP.
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Affiliation(s)
- Helle Heibroch Petersen
- Max-Delbrueck-Center for Molecular Medicine and Medical Faculty of the Free University of Berlin, Germany
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20
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Affiliation(s)
- S E Aspland
- Department of Biology, University of California, San Diego, 9500 Gilman Drive, San Diego, CA 92093-0366, USA
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21
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Rutherford MN, Bayly GR, Matthews BP, Okuda T, Dinjens WM, Kondoh H, LeBrun DP. The leukemogenic transcription factor E2a-Pbx1 induces expression of the putative N-myc and p53 target gene NDRG1 in Ba/F3 cells. Leukemia 2001; 15:362-70. [PMID: 11237058 DOI: 10.1038/sj.leu.2402059] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The chimeric transcription factor E2a-Pbx1 is expressed as a result of the 1;19 chromosomal translocation in some 5% of cases of pediatric acute lymphoblastic leukemia. We investigated the biological and transcriptional consequences of forced expression of E2a-Pbx1 in the interleukin-3 (IL-3) dependent, bone marrow-derived cell line Ba/F3. We show that forced expression of E2a-Pbx1 induces apoptosis in Ba/F3 cells without apparent effects on cell cycle progression. This pro-apoptotic effect is enhanced on cytokine deprivation. Furthermore, using cDNA representational difference analysis (RDA), we show that these cellular effects are associated with marked induction of the gene NDRG1, which was previously identified as a target of transcriptional repression by N-myc and induction by the tumor suppressor protein p53. We identify a portion of the NDRG1 promoter capable of mediating transcriptional induction by E2a-Pbx1 and show that NDRG1 is also induced on simple IL-3 deprivation of BaF3 cells. Although we show that E2a-Pbx1 induction of NDRG1 is not impaired as a result of targeting p53 using HPV E6, and therefore does not appear to be p53-dependent, our results overall are consistent with the notion that induction of NDRG1 by E2a-Pbx1 may represent part of an apoptotic or cytostatic cellular response to oncogene activation.
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Affiliation(s)
- M N Rutherford
- Department of Pathology, Queen's University, Kingston, Ontario, Canada
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