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Kaufeld T, Foerster KA, Schilling T, Kielstein JT, Kaufeld J, Shrestha M, Haller HG, Haverich A, Schmidt BMW. Preoperative serum uric acid predicts incident acute kidney injury following cardiac surgery. BMC Nephrol 2018; 19:161. [PMID: 29973162 PMCID: PMC6031174 DOI: 10.1186/s12882-018-0970-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 06/26/2018] [Indexed: 12/01/2022] Open
Abstract
Background Acute kidney injury (AKI) following cardiac surgery is a frequent complication and several risk factors increasing its incidence have already been characterized. This study evaluates the influence of preoperative increased serum uric acid (SUA) levels in comparison with other known risk factors on the incidence of AKI following cardiac surgery. Methods During a period of 5 month, 247 patients underwent elective coronary artery bypass grafting, valve replacement/ repair or combined bypass and valve surgery. Datas were prospectively analyzed. Primary endpoint was the incidence of AKI as defined by the AKI criteria comparing patients with preoperative serum uric acid (SUA) levels below versus above the median. Multivariate logistic regression analysis was used to identify independent predictors of postoperative AKI. Results Thirty (12.1%) of the 247 patients developed postoperative AKI, 24 of 30 (80%) had preoperative SUA- levels above the median (≥373 μmol/l) (OR: 4.680, CI 95% 1.840; 11.904, p = 0.001). In the multivariate analysis SUA levels above the median (OR: 5.497, CI 95% 1.772; 17.054, p = 0.003), cardiopulmonary bypass (CPB) time > 90 min (OR: 4.595, CI 95% 1.587; 13.305, p = 0.005), cardiopulmonary bypass (CPB) > 30 kg/m2 (OR: 3.208, CI 95% 1.202; 8.562; p = 0.02), and preoperative elevated serum-creatinine levels (OR: 1.015, CI 95% 1.001; 1.029, p = 0.04) were independently associated with postoperative AKI. Conclusions Serum uric acid is an independent risk marker for AKI after cardiac surgery. From all evaluated factors it showed the highest odds ratio.
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Martens A, Kaufeld T, Beckmann E, Koigeldiyev N, Fleissner F, Korte W, Krueger H, Haverich A, Shrestha M. Clinical Features and Risk Factors for Renal Failure after Total Aortic Arch Repair. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1627885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Martens A, Korte W, Shrestha M, Ismail I, Cebotari S, Warnecke G, Haverich A. Establishing a Simulation Training Platform for Cardiac Surgery Residents: Improving Surgical Training and Technical Skill Assessment. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Shrestha M, Kaufeld T, Beckmann E, Korte W, Fleissner F, Krueger H, Haverich A, Martens A. Minimally Invasive Aortic Surgery via Upper Hemi-sternotomy is Comparable to Those with Full Sternotomy: A Single Center Experience with over 400 Patients. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1627833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Rio-Machin A, Gómez-López G, Muñoz J, Garcia-Martinez F, Maiques-Diaz A, Alvarez S, Salgado RN, Shrestha M, Torres-Ruiz R, Haferlach C, Larráyoz MJ, Calasanz MJ, Fitzgibbon J, Cigudosa JC. The molecular pathogenesis of the NUP98-HOXA9 fusion protein in acute myeloid leukemia. Leukemia 2017. [PMID: 28630438 PMCID: PMC5596207 DOI: 10.1038/leu.2017.194] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Nöth U, Shrestha M, Schüre JR, Deichmann R. Quantitative in vivo T2 mapping using fast spin echo techniques - A linear correction procedure. Neuroimage 2017; 157:476-485. [PMID: 28602814 DOI: 10.1016/j.neuroimage.2017.06.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/02/2017] [Accepted: 06/06/2017] [Indexed: 11/16/2022] Open
Abstract
A method is presented for correcting the effects of stimulated and indirect echoes on quantitative T2 mapping data acquired with multiple spin echo techniques, such as turbo spin echo. In contrast to similar correction techniques proposed in the literature, the method does not require a priori knowledge of the radio frequency (RF) pulse profiles. In a first step, for the T2 mapping protocol under investigation, signal decay curves S(TE) are simulated for a range of different RF pulse profiles. The actual signal decay S(TE) is then measured on a phantom with known T2, so the approximate RF pulse profiles can be derived via comparison with the simulated decay curves. In a second step, with the RF pulses obtained from step one, signal decay curves S(TE) are simulated for different T2 values and fitted mono-exponentially, thus allowing to deduce the relationship between true T2 and the apparent T2 (T2app) values. Results show that this relationship is approximately linear, allowing for a direct correction of T2app maps. If the amplitude of the transmitted RF field (B1) does not exceed the nominal value by more than 10%, it is shown that a B1-independent correction of T2app maps yields sufficiently accurate results for T2. A B1-dependent version is also presented. The method is tested in vitro on a phantom with different T2 values and in vivo on healthy subjects.
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Goyama S, Shrestha M, Schibler J, Rosenfeldt L, Miller W, O’Brien E, Mizukawa B, Kitamura T, Palumbo JS, Mulloy JC. Protease-activated receptor-1 inhibits proliferation but enhances leukemia stem cell activity in acute myeloid leukemia. Oncogene 2017; 36:2589-2598. [PMID: 27819671 PMCID: PMC5418093 DOI: 10.1038/onc.2016.416] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Revised: 09/04/2016] [Accepted: 09/30/2016] [Indexed: 01/27/2023]
Abstract
Eradication of leukemia stem cells (LSCs) is the ultimate goal of treating acute myeloid leukemia (AML). We recently showed that the combined loss of Runx1/Cbfb inhibited the development of MLL-AF9-induced AML. However, c-Kit+/Gr-1- cells remained viable in Runx1/Cbfb-deleted cells, indicating that suppressing RUNX activity may not eradicate the most immature LSCs. In this study, we found upregulation of several hemostasis-related genes, including the thrombin-activatable receptor PAR-1 (protease-activated receptor-1), in Runx1/Cbfb-deleted MLL-AF9 cells. Similar to the effect of Runx1/Cbfb deletion, PAR-1 overexpression induced CDKN1A/p21 expression and attenuated proliferation in MLL-AF9 cells. To our surprise, PAR-1 deficiency also prevented leukemia development induced by a small number of MLL-AF9 leukemia stem cells (LSCs) in vivo. PAR-1 deficiency also reduced leukemogenicity of AML1-ETO-induced leukemia. Re-expression of PAR-1 in PAR-1-deficient cells combined with a limiting-dilution transplantation assay demonstrated the cell-dose-dependent role of PAR-1 in MLL-AF9 leukemia: PAR-1 inhibited rapid leukemic proliferation when there were a large number of LSCs, while a small number of LSCs required PAR-1 for their efficient growth. Mechanistically, PAR-1 increased the adherence properties of MLL-AF9 cells and promoted their engraftment to bone marrow. Taken together, these data revealed a multifaceted role for PAR-1 in leukemogenesis, and highlight this receptor as a potential target to eradicate primitive LSCs in AML.
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Rojas S, Trinh-Adams M, Schmitto J, Hanke J, Fleissner F, Uribarri A, Warnecke G, Martens A, Shrestha M, Cebotari S, Haverich A, Ismail I. Early Surgical Myocardial Revascularization in Non-ST-Segment Elevation Acute Coronary Syndrome. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Beckmann E, Rustum S, Fleissner F, Wiegmann B, Shrestha M, Martens A, Haverich A, Ismail I. Surgical Treatment of Coronary Artery Aneurysms. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hanke J, Rojas S, Dogan G, Feldmann C, Beckmann E, Deniz E, Shrestha M, Haverich A, Schmitto J. First Series of Left Ventricular Assist Device Upgrades to HeartMate 3. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Deniz E, Hanke J, Schwick F, Rojas-Hernandez S, Dogan G, Feldmann C, Molitoris U, Fegbeutel C, Bara C, Shrestha M, Haverich A, Schmitto J. First Experience with the HeartAssist5® Left Ventricular Assist Device. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zacksenhaus E, Liu J, Jiang Z, Yao Y, Xia L, Shrestha M, Ben-David Y. Transcription Factors in Breast Cancer—Lessons From Recent Genomic Analyses and Therapeutic Implications. CHROMATIN PROTEINS AND TRANSCRIPTION FACTORS AS THERAPEUTIC TARGETS 2017; 107:223-273. [DOI: 10.1016/bs.apcsb.2016.10.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Scrafford C, Basnet S, Ansari I, Shrestha L, Shrestha S, Ghimire R, Katz J, Khatry S, Checkley W, Basnet S, Shrestha M, Thapa S, Kansakar P, Puree S, Todi V, Tielsch J. Evaluation of Digital Auscultation to Diagnose Pneumonia in Children 2 to 35 Months of Age in a Clinical Setting in Kathmandu, Nepal: A Prospective Case–Control Study. J PEDIAT INF DIS-GER 2016. [DOI: 10.1055/s-0036-1593749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Shrestha M, Lunau K, Dorin A, Schulze B, Bischoff M, Burd M, Dyer AG. Floral colours in a world without birds and bees: the plants of Macquarie Island. PLANT BIOLOGY (STUTTGART, GERMANY) 2016; 18:842-50. [PMID: 27016399 DOI: 10.1111/plb.12456] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 03/24/2016] [Indexed: 05/07/2023]
Abstract
We studied biotically pollinated angiosperms on Macquarie Island, a remote site in the Southern Ocean with a predominately or exclusively dipteran pollinator fauna, in an effort to understand how flower colour affects community assembly. We compared a distinctive group of cream-green Macquarie Island flowers to the flora of likely source pools of immigrants and to a continental flora from a high latitude in the northern hemisphere. We used both dipteran and hymenopteran colour models and phylogenetically informed analyses to explore the chromatic component of community assembly. The species with cream-green flowers are very restricted in colour space models of both fly vision and bee vision and represent a distinct group that plays a very minor role in other communities. It is unlikely that such a community could form through random immigration from continental source pools. Our findings suggest that fly pollination has imposed a strong ecological filter on Macquarie Island, favouring floral colours that are rare in continental floras. This is one of the strongest demonstrations that plant-pollinator interactions play an important role in plant community assembly. Future work exploring colour choices by dipteran flower visitors would be valuable.
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Velie BD, Shrestha M, Francois L, Schurink A, Stinckens A, Blott S, Ducro BJ, Mikko S, Thomas R, Sundquist M, Eriksson S, Buys N, Lindgren G. P6017 A high density genome-wide scan for genetic risk factors of insect bite hypersensitivity (IBH): A Horsegene Project Initiative. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement4156a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Fegraeus KJ, Shrestha M, Schurink A, Eriksson S, Ducro BJ, Velie BD, Lindgren G. P5026 Genetic analysis of conformation traits in Icelandic horses. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement4127b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Pomeroy-Stevens A, D’Agostino A, Shrestha M, Muzoora A, Adero N, Shrestha M. Estimating country-level nutrition investments: Global implications of a
two country study. Ann Glob Health 2016. [DOI: 10.1016/j.aogh.2016.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Shrestha M, Mildner T, Schlumm T, Robertson SH, Möller H. Three-dimensional echo-planar cine imaging of cerebral blood supply using arterial spin labeling. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2016; 29:799-810. [PMID: 27225871 PMCID: PMC5124058 DOI: 10.1007/s10334-016-0565-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 04/23/2016] [Accepted: 05/04/2016] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Echo-planar imaging (EPI) with CYlindrical Center-out spatiaL Encoding (EPICYCLE) is introduced as a novel hybrid three-dimensional (3D) EPI technique. Its suitability for the tracking of a short bolus created by pseudo-continuous arterial spin labeling (pCASL) through the cerebral vasculature is demonstrated. MATERIALS AND METHODS EPICYCLE acquires two-dimensional planes of k-space along center-out trajectories. These "spokes" are rotated from shot to shot about a common axis to encode a k-space cylinder. To track a bolus of labeled blood, the same subset of evenly distributed spokes is acquired in a cine fashion after a short period of pCASL. This process is repeated for all subsets to fill the whole 3D k-space of each time frame. RESULTS The passage of short pCASL boluses through the vasculature of a 3D imaging slab was successfully imaged using EPICYCLE. By choosing suitable sequence parameters, the impact of slab excitation on the bolus shape could be minimized. Parametric maps of signal amplitude, transit time, and bolus width reflected typical features of blood transport in large vessels. CONCLUSION The EPICYCLE technique was successfully applied to track a short bolus of labeled arterial blood during its passage through the cerebral vasculature.
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Schmitto J, Rojas S, Avsar M, Hanke J, Uribarri A, Burkhoff D, Tümler K, Ahrens P, Molitoris U, Martens A, Berliner D, Bauersachs J, Shrestha M, Cebotari S, Strueber M, Haverich A. Less-Invasive Left Ventricular Assist Device Implantations: Experience after More Than 100 Treated Patients. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Martens A, Koigeldiyev N, Beckmann E, Kaufeld T, Fleissner F, Umminger J, Krüger H, Haverich A, Shrestha M. Complex Aortic Arch Repair Can Be Performed with Good Outcome in Septuagenarians. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Martens A, Koigeldiyev N, Beckmann E, Kaufeld T, Fleissner F, Umminger J, Krüger H, Haverich A, Shrestha M. Pericardial Tube Grafts: Bail-out Option or Routine Concept for Thoracic Aortic Infections? Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Beckmann E, Alhadi F, Hoeffler K, Sarikouch S, Koigeldiev N, Kaufeld K, Umminger J, Shrestha M, Haverich A, Martens A. Does Rhythm Recover after Pacemaker Implantation for Atrioventricular Conduction Disorder after Sutureless Aortic Valve Replacement? Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Rojas S, Avsar M, Hanke J, Deniz E, Hillert M, Tümler K, Kühn C, Martens A, Warnecke G, Shrestha M, Cebotari S, Haverich A, Schmitto J. Less Invasive LVAD Surgery in Cardiogenic Shock. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Umminger J, Arar M, Höffler K, Martens A, Bara C, Haverich A, Sarikouch S, Shrestha M. Aortic Valve Replacement in Geriatric Patients: Are Sutureless Valves the Way to go? Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Goyama S, Schibler J, Gasilina A, Shrestha M, Lin S, Link KA, Chen J, Whitman SP, Bloomfield CD, Nicolet D, Assi SA, Ptasinska A, Heidenreich O, Bonifer C, Kitamura T, Nassar NN, Mulloy JC. UBASH3B/Sts-1-CBL axis regulates myeloid proliferation in human preleukemia induced by AML1-ETO. Leukemia 2015; 30:728-39. [PMID: 26449661 DOI: 10.1038/leu.2015.275] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 09/22/2015] [Accepted: 09/30/2015] [Indexed: 12/24/2022]
Abstract
The t(8;21) rearrangement, which creates the AML1-ETO fusion protein, represents the most common chromosomal translocation in acute myeloid leukemia (AML). Clinical data suggest that CBL mutations are a frequent event in t(8;21) AML, but the role of CBL in AML1-ETO-induced leukemia has not been investigated. In this study, we demonstrate that CBL mutations collaborate with AML1-ETO to expand human CD34+ cells both in vitro and in a xenograft model. CBL depletion by shRNA also promotes the growth of AML1-ETO cells, demonstrating the inhibitory function of endogenous CBL in t(8;21) AML. Mechanistically, loss of CBL function confers hyper-responsiveness to thrombopoietin and enhances STAT5/AKT/ERK/Src signaling in AML1-ETO cells. Interestingly, we found the protein tyrosine phosphatase UBASH3B/Sts-1, which is known to inhibit CBL function, is upregulated by AML1-ETO through transcriptional and miR-9-mediated regulation. UBASH3B/Sts-1 depletion induces an aberrant pattern of CBL phosphorylation and impairs proliferation in AML1-ETO cells. The growth inhibition caused by UBASH3B/Sts-1 depletion can be rescued by ectopic expression of CBL mutants, suggesting that UBASH3B/Sts-1 supports the growth of AML1-ETO cells partly through modulation of CBL function. Our study reveals a role of CBL in restricting myeloid proliferation of human AML1-ETO-induced leukemia, and identifies UBASH3B/Sts-1 as a potential target for pharmaceutical intervention.
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