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Tanashyan M, Shabalina A, Roitman E. Microrheological disorders in patients with polycythemia vera suffered acute ischemic stroke. Mol Cell Biochem 2022; 477:989-994. [PMID: 34984595 DOI: 10.1007/s11010-021-04352-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 12/23/2021] [Indexed: 11/27/2022]
Abstract
The relevance of the study is determined by the fact that the combination of cerebrovascular disorders and myeloproliferative diseases requires the search for a predictive biomarker to improve outcomes. The aim of this article was to explore the meanings of microrheological disorders in patients with polycythemia vera (PV) who suffered an acute ischemic stroke (AIS). The study was carried out at the Research center of Neurology. We studied microrheological properties in 181 patients (aged 42-75 years). From the AIS developed in 68 (38%) patients with PV; 59 (32%) patients with AIS were without PV; 54 (30%) patients with PV did not suffer AIS. Microrheological disorders, first of all, the red blood cells (RBC) deformability correlated to AIS severity and its features in comorbid patients. The RBC deformability was dependent on the allelic load of the V617F mutation in the JAK2 gene. Additionally, it was found that RBC deformability perform diagnostic value in the acute phase of ischemic stroke as well as get predictive value for thrombotic complications development within 2 years after AIS in such patients. We suppose that in patients with PV an ischemic stroke and thrombosis would directly depend on the success of PV treatment. In turn, RBC deformability is applicable for some predictive models to late thrombosis development.
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Affiliation(s)
- Marine Tanashyan
- Department of Neurological No. 1, Research Center of Neurology, 80 Volokolamskoye Shosse, 125367, Moscow, Russian Federation
| | - Alla Shabalina
- Laboratory of Hemorheology, Hemostasis and Pharmacokinetics with Clinical Laboratory Diagnostics, Research Center of Neurology, 80 Volokolamskoye Shosse, 125367, Moscow, Russian Federation
| | - Eugene Roitman
- Laboratory of Hemorheology, Hemostasis and Pharmacokinetics with Clinical Laboratory Diagnostics, Research Center of Neurology, 80 Volokolamskoye Shosse, 125367, Moscow, Russian Federation.
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Karantanos T, Moliterno AR. The roles of JAK2 in DNA damage and repair in the myeloproliferative neoplasms: Opportunities for targeted therapy. Blood Rev 2018; 32:426-432. [PMID: 29627078 DOI: 10.1016/j.blre.2018.03.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 03/03/2018] [Accepted: 03/27/2018] [Indexed: 02/09/2023]
Abstract
The JAK2V617F-positive myeloproliferative neoplasms (MPN) serve as an excellent model for the study of genomic instability accumulation during cancer progression. Recent studies highlight the implication of JAK2 activating mutations in the development of DNA damage via reactive oxygen species (ROS) production, replication stress induction and the accumulation of genomic instability via the increased degradation of p53 and acquisition of a "mutagenic" phenotype. The accumulation of genomic instability and acquisition of mutations in critical DNA damage repair (DDR) mediators appears to be implicated in the progression of JAK2V617F-positive MPN. On the other hand, JAK2 signaling normally induces DDR through activation of repair mediators such as Chk1, RAD51 and RECQL5. These opposing effects on DNA integrity in the setting of JAK2V617F have significant clinical implications and have led to the introduction of novel combinational therapies for these diseases. The inhibition of MDM2 with Nutlin-3 improves the efficacy of IFN-α via decreased p53 degradation, the combination of hydroxyurea with Ruxolitinib, and their combination with PARP inhibitors have significant anti-tumor effects. A better understanding of the implication of JAK2 in the development and repair of DNA damage can improve our understanding of the biology of these neoplasms, meliorate the risk stratification of our patients and enrich our therapeutic armamentarium.
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Affiliation(s)
| | - Alison R Moliterno
- Division of Hematology, Department of Medicine, The Johns Hopkins University School of Medicine, USA.
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Pemmaraju N, Utengen A, Gupta V, Kiladjian JJ, Mesa R, Thompson MA. Social Media and Myeloproliferative Neoplasms (MPN): Analysis of Advanced Metrics From the First Year of a New Twitter Community: #MPNSM. Curr Hematol Malig Rep 2017; 11:456-461. [PMID: 27492118 DOI: 10.1007/s11899-016-0341-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The social media platform Twitter has provided the hematology/oncology community with unprecedented, novel methods of interpersonal communication and increased ability for the dissemination of important updates in a rapidly moving field. The advent, and subsequent success, of disease-specific Twitter communities have further enabled interested healthcare stakeholders to become quickly organized around a unique set of rare medical conditions, such as hematologic malignancies, that, historically, generally lack large amounts of reliable online information. One example is the Twitter community #MPNSM (myeloproliferative neoplasms on social media), which was started approximately one and half years ago and has served as a recognized venue for discussion among many members of the MPN community, including patients, researchers, providers, and advocacy organizations. This article will focus on understanding the impact of the founding of this community via the analysis of advanced Twitter metrics of user experience, from the first year of use for this novel healthcare hashtag.
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Affiliation(s)
- Naveen Pemmaraju
- Department of Leukemia, The University of Texas M.D. Anderson Cancer Center, Unit 428, PO BOX 301402, TX 77230-1402, Houston, TX, USA.
| | | | - Vikas Gupta
- The Elizabeth and Tony Comper MPN Program,-Princess Margaret Cancer Center, Toronto, ON, Canada
| | - Jean-Jacques Kiladjian
- CIC (Clinical Investigations Center, INSERM CIC 1427) Hôpital Saint-Louis & Université Paris Diderot, 1, Avenue Claude Vellefaux, 75010, Paris, France
| | - Ruben Mesa
- Division of Hematology & Medical Oncology, Mayo Clinic in Arizona, Scottsdale, AZ, USA
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Social Media and Myeloproliferative Neoplasms (MPN)--Focus on Twitter and the Development of a Disease-specific Community: #MPNSM. Curr Hematol Malig Rep 2016; 10:413-20. [PMID: 26411990 PMCID: PMC10174181 DOI: 10.1007/s11899-015-0287-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The advent of social media has led to the ability for individuals all over the world to communicate with each other, in real time, about mutual topics of interest in an unprecedented manner. Recently, the use of social media has increased among people interested in healthcare and medical research, particularly in the field of hematology and oncology, a field which frequently experiences rapid shifts of information and novel, practice-changing discoveries. Among the many social media platforms available to cancer patients and providers, one platform in particular, Twitter, has become the focus for the creation of disease-specific communities, especially for those interested in, affected by, or those who perform research in the fields of rare cancers, which historically have had a dearth of reliable information available. This article will focus on the initiation and progress of one such Twitter hematology/oncology community, #mpnsm, which was originally created for the purpose of serving as a venue for improving the interaction among patients, providers, researchers, and organizations with interest in the myeloproliferative neoplasms (MPNs) and to further the availability of reliable up-to-date analysis; relevant expert commentary; and readily usable information for patients, providers, and other groups interested in this field.
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Pratz KW, Koh BD, Patel AG, Flatten KS, Poh W, Herman JG, Dilley R, Harrell MI, Smith BD, Karp JE, Swisher EM, McDevitt MA, Kaufmann SH. Poly (ADP-Ribose) Polymerase Inhibitor Hypersensitivity in Aggressive Myeloproliferative Neoplasms. Clin Cancer Res 2016; 22:3894-902. [PMID: 26979391 DOI: 10.1158/1078-0432.ccr-15-2351] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 02/29/2016] [Indexed: 01/31/2023]
Abstract
PURPOSE DNA repair defects have been previously reported in myeloproliferative neoplasms (MPN). Inhibitors of PARP have shown activity in solid tumors with defects in homologous recombination (HR). This study was performed to assess MPN sensitivity to PARP inhibitors ex vivo EXPERIMENTAL DESIGN HR pathway integrity in circulating myeloid cells was evaluated by assessing the formation of RAD51 foci after treatment with ionizing radiation or PARP inhibitors. Sensitivity of MPN erythroid and myeloid progenitors to PARP inhibitors was evaluated using colony formation assays. RESULTS Six of 14 MPN primary samples had reduced formation of RAD51 foci after exposure to ionizing radiation, suggesting impaired HR. This phenotype was not associated with a specific MPN subtype, JAK2 mutation status, or karyotype. MPN samples showed increased sensitivity to the PARP inhibitors veliparib and olaparib compared with normal myeloid progenitors. This hypersensitivity, which was most pronounced in samples deficient in DNA damage-induced RAD51 foci, was observed predominantly in samples from patients with diagnoses of chronic myelogenous leukemia, chronic myelomonocytic leukemia, or unspecified myelodysplastic/MPN overlap syndromes. CONCLUSIONS Like other neoplasms with HR defects, MPNs exhibit PARP inhibitor hypersensitivity compared with normal marrow. These results suggest that further preclinical and possibly clinical study of PARP inhibitors in MPNs is warranted. Clin Cancer Res; 22(15); 3894-902. ©2016 AACR.
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Affiliation(s)
- Keith W Pratz
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland.
| | - Brian D Koh
- Department of Oncology, Mayo Clinic, Rochester, Minnesota
| | - Anand G Patel
- Department of Molecular Pharmacology & Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota
| | | | - Weijie Poh
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland
| | - James G Herman
- Division of Hematology/Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania
| | - Robert Dilley
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland
| | - Maria I Harrell
- Department of Obstetrics & Gynecology, University of Washington School of Medicine, Seattle, Washington
| | - B Douglas Smith
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland
| | - Judith E Karp
- Department of Oncology and the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, Baltimore, Maryland
| | - Elizabeth M Swisher
- Department of Obstetrics & Gynecology, University of Washington School of Medicine, Seattle, Washington
| | - Michael A McDevitt
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Scott H Kaufmann
- Department of Oncology, Mayo Clinic, Rochester, Minnesota. Department of Molecular Pharmacology & Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota
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Abstract
Diagnosing a myelodysplastic syndrome (MDS) can be challenging. Somatic mutations are common in MDS and might have diagnostic utility in patients with idiopathic cytopenias of undetermined significance (ICUS). However, using mutations to diagnose MDS is complicated by several issues: (1) no gene is mutated in most cases, (2) no mutated gene is highly specific for MDS, (3) clonal hematopoiesis is common in older individuals without disease, and (4) we lack outcome data for ICUS patients with clonal cytopenias of undetermined significance (CCUS). Despite these caveats, genetic sequencing can inform the diagnosis of MDS. CCUS patients more closely resemble patients with MDS than age matched controls with somatic mutations. Genetic testing can identify alternative diagnoses in cytopenic patients and help risk stratify those with proven MDS. While we cannot include somatic mutations in the diagnostic definition of MDS now, testing to recognize CCUS will help characterize outcomes in these diagnostically challenging patients.
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Affiliation(s)
- Rafael Bejar
- Division of Hematology and Oncology, Moores Cancer Center, University of California, San Diego, 3855 Health Sciences Drive MC 0820, La Jolla, CA, 92093-0820, USA,
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