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Raffaele M, Kovacovicova K, Frohlich J, Lo Re O, Giallongo S, Oben JA, Faldyna M, Leva L, Giannone AG, Cabibi D, Vinciguerra M. Mild exacerbation of obesity- and age-dependent liver disease progression by senolytic cocktail dasatinib + quercetin. Cell Commun Signal 2021; 19:44. [PMID: 33832488 PMCID: PMC8034117 DOI: 10.1186/s12964-021-00731-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [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: 12/15/2020] [Accepted: 03/08/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Nonalcoholic fatty liver disease (NAFLD) is increasingly prevalent and represents a growing challenge in terms of prevention and treatment. A minority of affected patients develops inflammation, subsequently fibrosis, cirrhosis and hepatocellular carcinoma (HCC). HCC is a leading cause of cancer-related death. An increased number of senescent cells correlate with age-related tissue degeneration during NAFLD-induced HCC. Senolytics are promising agents that target selectively senescent cells. Previous studies showed that whereas a combination of the senolytic drugs dasatinib and quercetin (D + Q) reduced NAFLD in mice, D + Q lacked efficacy in removing doxorubicin-induced β-gal-positive senescent cells in human HCC xenografted mice. Whether D + Q has an effect on the age-associated spectrum of NAFLD-inflammation-HCC remains unknown. METHODS Here, we utilized an established model of age- and obesity-associated HCC, the low dose diethylnitrosamine (DEN)/high fat diet (HFD), a regimen promoting liver inflammation and tumorigenesis over a long period of 9 months. Four groups of mice each were created: group 1 included control untreated mice; group 2 included mice treated with D + Q; group 3 included mice undergoing the DEN/HFD protocol; group 4 included mice undergoing the DEN/HFD protocol with the administration of D + Q. At the end of the chemical/dietary regimen, we analyzed liver damage and cell senescence by histopathology, qPCR and immunoblotting approaches. RESULTS Unexpectedly, D + Q worsened liver disease progression in the DEN/HFD mouse model, slightly increasing histological damage and tumorigenesis, while having no effect on senescent cells removal. CONCLUSIONS In summary, using an animal model that fully recapitulates NAFLD, we demonstrate that these compounds are ineffective against age-associated NAFLD-induced HCC. Video Abstract.
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Affiliation(s)
- Marco Raffaele
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
| | - Kristina Kovacovicova
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
| | - Jan Frohlich
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
| | - Oriana Lo Re
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
| | - Sebastiano Giallongo
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jude A. Oben
- Institute for Liver and Digestive Health (ILDH), Division of Medicine, University College London (UCL), London, UK
| | | | - Lenka Leva
- Veterinary Research Institute, Brno, Czech Republic
| | - Antonino Giulio Giannone
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, Pathologic Anatomy Unit-University of Palermo, Palermo, Italy
| | - Daniela Cabibi
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, Pathologic Anatomy Unit-University of Palermo, Palermo, Italy
| | - Manlio Vinciguerra
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
- Institute for Liver and Digestive Health (ILDH), Division of Medicine, University College London (UCL), London, UK
- ERA Chair in Translational Stem Cell Biology, Medical University of Varna, Varna, Bulgaria
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Fingrova Z, Ambroz D, Jansa P, Kuchar J, Lindner J, Kunstyr J, Aschermann M, Linhart A, Havranek S. The prevalence and clinical outcome of supraventricular tachycardia in different etiologies of pulmonary hypertension. PLoS One 2021; 16:e0245752. [PMID: 33471824 PMCID: PMC7817034 DOI: 10.1371/journal.pone.0245752] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 09/02/2020] [Accepted: 01/06/2021] [Indexed: 11/24/2022] Open
Abstract
Purpose Patients with pulmonary hypertension (PH) frequently suffer from supraventricular tachycardias (SVT). The main purpose of our study was to identify the cumulative incidence of SVT in patients with different etiologies of PH. The secondary objective was to analyse the clinical impact of SVT. Methods We retrospectively studied the prevalence of SVT and the clinical outcome in 755 patients (41% males; 60 ± 15 years; mean follow-up 3.8 ± 2.8 years) with PH of different etiologies. The prevalence of SVT was analysed separately in isolated pre-capillary PH (Ipc-PH) and in patients with combined post- and pre-capillary PH (Cpc-PH). Results The prevalence of SVT in the Ipc-PH group (n = 641) was 25% (n = 162). The most prevalent arrhythmias were atrial fibrillation followed by a typical atrial flutter (17% and 4.4% of all Icp-PH patients). An excessive prevalence of SVT was found in patients with pulmonary arterial hypertension associated with congenital heart disease (35%, p = 0.01). Out of the overall study population, Cpc-PH was present in 114 (15%) patients. Patients with Cpc-PH manifested a higher prevalence of SVT than subjects with Ipc-PH (58; 51% vs. 162; 25%; p <0.0001) and were more likely to have persistent or permanent atrial fibrillation (38; 29% vs. 61; 10%; p <0.0001). Parameters significantly associated with mortality in a multivariate analysis included age, male gender, functional exercise capacity and right atrial diameter (p < 0.05). Neither diagnosis of SVT nor type of arrhythmia predicted mortality. Conclusions The study detected a significant prevalence of SVT in the population of PH of different origins. Different spectrum and prevalence of arrhythmia might be expected in different etiologies of PH. Patients with an elevated post-capillary pressure showed a higher arrhythmia prevalence, predominantly due to an excessive number of atrial fibrillations. The diagnosis of SVT was not associated with mortality.
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Affiliation(s)
- Zdenka Fingrova
- 1Faculty of Medicine, 2 Department of Medicine-Department of Cardiovascular Medicine, General University Hospital, Charles University, Prague, Czech Republic
| | - David Ambroz
- 1Faculty of Medicine, 2 Department of Medicine-Department of Cardiovascular Medicine, General University Hospital, Charles University, Prague, Czech Republic
| | - Pavel Jansa
- 1Faculty of Medicine, 2 Department of Medicine-Department of Cardiovascular Medicine, General University Hospital, Charles University, Prague, Czech Republic
| | - Jan Kuchar
- 1Faculty of Medicine, 2 Department of Medicine-Department of Cardiovascular Medicine, General University Hospital, Charles University, Prague, Czech Republic
- Regional Hospital in Tabor, Tabor, Czech Republic
| | - Jaroslav Lindner
- 1 Faculty of Medicine, 2 Department of Surgery–Department of Cardiovascular Surgery, General University Hospital, Charles University, Prague, Czech Republic
| | - Jan Kunstyr
- 1 Faculty of Medicine, Department of Anaesthesiology, Resuscitation and Intensive Medicine, General University Hospital, Charles University, Prague, Czech Republic
| | - Michael Aschermann
- 1Faculty of Medicine, 2 Department of Medicine-Department of Cardiovascular Medicine, General University Hospital, Charles University, Prague, Czech Republic
| | - Ales Linhart
- 1Faculty of Medicine, 2 Department of Medicine-Department of Cardiovascular Medicine, General University Hospital, Charles University, Prague, Czech Republic
| | - Stepan Havranek
- 1Faculty of Medicine, 2 Department of Medicine-Department of Cardiovascular Medicine, General University Hospital, Charles University, Prague, Czech Republic
- * E-mail:
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Spinar J, Spinarova L, Malek F, Ludka O, Krejci J, Ostadal P, Vondrakova D, Labr K, Spinarova M, Pavkova Goldbergova M, Benesova K, Jarkovsky J, Parenica J. Prognostic value of NT-proBNP added to clinical parameters to predict two-year prognosis of chronic heart failure patients with mid-range and reduced ejection fraction - A report from FAR NHL prospective registry. PLoS One 2019; 14:e0214363. [PMID: 30913251 PMCID: PMC6435170 DOI: 10.1371/journal.pone.0214363] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 05/15/2018] [Accepted: 03/12/2019] [Indexed: 12/11/2022] Open
Abstract
Background According to guidelines, the prognosis of patients with chronic heart failure can be predicted by determining the levels of natriuretic peptides, the NYHA classification and comorbidities. The aim our work was to develop a prognostic score in chronic heart failure patients that would take account of patients’ comorbidities, NYHA and NT-proBNP levels. Methods and results A total of 1,088 patients with chronic heart failure with reduced ejection fraction (HFrEF) (LVEF<40%) and mid-range EF (HFmrEF) (LVEF 40–49%) were enrolled consecutively. Two-year all-cause mortality, heart transplantation and/or LVAD implantation were defined as the primary endpoint (EP). The occurrence of EP was 14.9% and grew with higher NYHA, namely 4.9% (NYHA I), 11.4% (NYHA II) and 27.8% (NYHA III–IV) (p<0.001). The occurrence of EP was 3%, 10% and 15–37% in patients with NT-proBNP levels ≤125 ng/L, 126–1000 ng/L and >1000 ng/L respectively. Discrimination abilities of NYHA and NT-proBNP were AUC 0.670 (p<0.001) and AUC 0.722 (p<0.001) respectively. The predictive value of the developed clinical model, which took account of older age, advanced heart failure (NYHA III+IV), anaemia, hyponatraemia, hyperuricaemia and being on a higher dose of furosemide (>40 mg daily) (AUC 0.773; p<0.001) was increased by adding the NT-proBNP level (AUC 0.790). Conclusion The use of prediction models in patients with chronic heart failure, namely those taking account of natriuretic peptides, should become a standard in routine clinical practice. It might contribute to a better identification of a high-risk group of patients in which more intense treatment needs to be considered, such as heart transplantation or LVAD implantation.
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Affiliation(s)
- Jindrich Spinar
- Department of Cardiology, University Hospital Brno, Brno, Czech Republic
- Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Lenka Spinarova
- Faculty of Medicine, Masaryk University, Brno, Czech Republic
- First Department of Internal Medicine, Cardiology and Angiology, St Anne’s University Hospital Brno, Brno, Czech Republic
| | - Filip Malek
- Department of Cardiology, Hospital Na Homolce, Prague, Czech Republic
| | - Ondrej Ludka
- Department of Cardiology, University Hospital Brno, Brno, Czech Republic
- Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jan Krejci
- Faculty of Medicine, Masaryk University, Brno, Czech Republic
- First Department of Internal Medicine, Cardiology and Angiology, St Anne’s University Hospital Brno, Brno, Czech Republic
| | - Petr Ostadal
- Department of Cardiology, Hospital Na Homolce, Prague, Czech Republic
| | - Dagmar Vondrakova
- Department of Cardiology, Hospital Na Homolce, Prague, Czech Republic
| | - Karel Labr
- Faculty of Medicine, Masaryk University, Brno, Czech Republic
- First Department of Internal Medicine, Cardiology and Angiology, St Anne’s University Hospital Brno, Brno, Czech Republic
| | - Monika Spinarova
- Faculty of Medicine, Masaryk University, Brno, Czech Republic
- First Department of Internal Medicine, Cardiology and Angiology, St Anne’s University Hospital Brno, Brno, Czech Republic
| | | | - Klara Benesova
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jiri Jarkovsky
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- * E-mail:
| | - Jiri Parenica
- Department of Cardiology, University Hospital Brno, Brno, Czech Republic
- Faculty of Medicine, Masaryk University, Brno, Czech Republic
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Belohlavek O, Jaruskova M, Skopalova M, Szarazova G, Simonova K. Improved beta-amyloid PET reproducibility using two-phase acquisition and grey matter delineation. Eur J Nucl Med Mol Imaging 2019; 46:297-303. [PMID: 30159586 PMCID: PMC6333723 DOI: 10.1007/s00259-018-4140-y] [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: 06/20/2018] [Accepted: 08/17/2018] [Indexed: 12/19/2022]
Abstract
PURPOSE We investigated whether the reproducibility of standard visual reporting (STD method) in flutemetamol (FMM) PET can be improved using a newly introduced method that uses grey matter edges derived from the perfusion phase (GM-EDGE method). METHODS Two-phase FMM PET was performed in 121 patients with mild cognitive impairment. Five nuclear medicine physicians blindly and independently evaluated all late-phase scans, initially employing the STD method and later the GM-EDGE method. A five-point scale was used to express the degree of amyloid positivity, and a binary classification (positive/negative) was used in combination with subjective confidence (five-point scale). Multirater Fleiss' kappa, intraclass correlation coefficient (ICC) and inter-rater reliability (Cohen's kappa) were determined for the STD and GM-EDGE methods. RESULTS The weighted Cohen's kappa values for the five-point measure of amyloid positivity ranged from 0.63 to 0.73 (median 0.70) for the STD method and from 0.76 to 0.89 (median 0.80) for the GM-EDGE method (ICC 0.84, 95% CI 0.79-0.88, for the STD method; 0.91, 95% CI 0.89-0.94, for the GM-EDGE method). The nonweighted Cohen's kappa value for the binary classification ranged from 0.73 to 0.93 (median 0.82) for the STD method and 0.90 to 0.97 (median 0.93) for the GM-EDGE method (Fleiss' kappa 0.82, 95% CI 0.77-0.88, for the STD method; 0.93, 95% CI 0.87-0.99, for the GM-EDGE method). The GM-EDGE method resulted in significantly greater subjective confidence in the readings of four physicians (p < 0.010). The binary classification was concordant among all five physicians in 80.8% of the scans using the STD method and in 91.6% of the scans using the GM-EDGE method (p = 0.016). CONCLUSION The newly introduced GM-EDGE method was associated with significantly higher inter-rater agreement among physicians and higher subjective confidence in the reading. The method is easy to implement in clinical practice, especially when the perfusion phase is utilized clinically.
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Affiliation(s)
- Otakar Belohlavek
- Department of Nuclear Medicine - PET Centre, Na Homolce Hospital, Roentgenova 37/2, 150 30, Prague 5, Czech Republic.
| | - Monika Jaruskova
- Department of Nuclear Medicine - PET Centre, Na Homolce Hospital, Roentgenova 37/2, 150 30, Prague 5, Czech Republic
| | - Magdalena Skopalova
- Department of Nuclear Medicine - PET Centre, Na Homolce Hospital, Roentgenova 37/2, 150 30, Prague 5, Czech Republic
| | - Gabriela Szarazova
- Department of Nuclear Medicine - PET Centre, Na Homolce Hospital, Roentgenova 37/2, 150 30, Prague 5, Czech Republic
| | - Katerina Simonova
- Department of Nuclear Medicine - PET Centre, Na Homolce Hospital, Roentgenova 37/2, 150 30, Prague 5, Czech Republic
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Pilatova K, Bencsikova B, Demlova R, Valik D, Zdrazilova-Dubska L. Myeloid-derived suppressor cells (MDSCs) in patients with solid tumors: considerations for granulocyte colony-stimulating factor treatment. Cancer Immunol Immunother 2018; 67:1919-1929. [PMID: 29748897 PMCID: PMC11028306 DOI: 10.1007/s00262-018-2166-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 04/30/2018] [Indexed: 01/15/2023]
Abstract
Myeloid-derived suppressor cells (MDSCs) have been shown to contribute to tumor escape from host immune surveillance and to cancer progression by production of tumor-promoting soluble factors. Granulocyte colony-stimulating factor (G-CSF) is a principle cytokine controlling granulocyte number. Recombinant human G-CSF (rhG-CSF) has become the main therapeutic agent for the treatment of neutropenia and prophylaxis of febrile neutropenia in cancer patients. However, we show here that rhG-CSF triggers accumulation of granulocytic and monocytic subsets. Consequently, we discuss the pharmacological use of granulopoiesis stimulating factors not only in the context of febrile neutropenia but also from the perspective of MDSC-dependent and MDSC-independent mechanisms of immunosuppression and cancer angiogenesis.
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Affiliation(s)
- Katerina Pilatova
- Department of Laboratory Medicine, Masaryk Memorial Cancer Institute, Zluty kopec 7, 656 53, Brno, Czech Republic
- RECAMO, Masaryk Memorial Cancer Institute, Brno, Czech Republic
- Department of Pharmacology, Medical Faculty, Masaryk University, Brno, Czech Republic
| | - Beatrix Bencsikova
- RECAMO, Masaryk Memorial Cancer Institute, Brno, Czech Republic
- Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Regina Demlova
- RECAMO, Masaryk Memorial Cancer Institute, Brno, Czech Republic
- Department of Pharmacology, Medical Faculty, Masaryk University, Brno, Czech Republic
- Clinical Trial Unit, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Dalibor Valik
- Department of Laboratory Medicine, Masaryk Memorial Cancer Institute, Zluty kopec 7, 656 53, Brno, Czech Republic
- RECAMO, Masaryk Memorial Cancer Institute, Brno, Czech Republic
- Department of Pharmacology, Medical Faculty, Masaryk University, Brno, Czech Republic
| | - Lenka Zdrazilova-Dubska
- Department of Laboratory Medicine, Masaryk Memorial Cancer Institute, Zluty kopec 7, 656 53, Brno, Czech Republic.
- RECAMO, Masaryk Memorial Cancer Institute, Brno, Czech Republic.
- Department of Pharmacology, Medical Faculty, Masaryk University, Brno, Czech Republic.
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Hiatt SM, Neu MB, Ramaker RC, Hardigan AA, Prokop JW, Hancarova M, Prchalova D, Havlovicova M, Prchal J, Stranecky V, Yim DKC, Powis Z, Keren B, Nava C, Mignot C, Rio M, Revah-Politi A, Hemati P, Stong N, Iglesias AD, Suchy SF, Willaert R, Wentzensen IM, Wheeler PG, Brick L, Kozenko M, Hurst ACE, Wheless JW, Lacassie Y, Myers RM, Barsh GS, Sedlacek Z, Cooper GM. De novo mutations in the GTP/GDP-binding region of RALA, a RAS-like small GTPase, cause intellectual disability and developmental delay. PLoS Genet 2018; 14:e1007671. [PMID: 30500825 PMCID: PMC6291162 DOI: 10.1371/journal.pgen.1007671] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 12/12/2018] [Accepted: 08/30/2018] [Indexed: 01/22/2023] Open
Abstract
Mutations that alter signaling of RAS/MAPK-family proteins give rise to a group of Mendelian diseases known as RASopathies. However, among RASopathies, the matrix of genotype-phenotype relationships is still incomplete, in part because there are many RAS-related proteins and in part because the phenotypic consequences may be variable and/or pleiotropic. Here, we describe a cohort of ten cases, drawn from six clinical sites and over 16,000 sequenced probands, with de novo protein-altering variation in RALA, a RAS-like small GTPase. All probands present with speech and motor delays, and most have intellectual disability, low weight, short stature, and facial dysmorphism. The observed rate of de novo RALA variants in affected probands is significantly higher (p = 4.93 x 10−11) than expected from the estimated random mutation rate. Further, all de novo variants described here affect residues within the GTP/GDP-binding region of RALA; in fact, six alleles arose at only two codons, Val25 and Lys128. The affected residues are highly conserved across both RAL- and RAS-family genes, are devoid of variation in large human population datasets, and several are homologous to positions at which disease-associated variants have been observed in other GTPase genes. We directly assayed GTP hydrolysis and RALA effector-protein binding of the observed variants, and found that all but one tested variant significantly reduced both activities compared to wild-type. The one exception, S157A, reduced GTP hydrolysis but significantly increased RALA-effector binding, an observation similar to that seen for oncogenic RAS variants. These results show the power of data sharing for the interpretation and analysis of rare variation, expand the spectrum of molecular causes of developmental disability to include RALA, and provide additional insight into the pathogenesis of human disease caused by mutations in small GTPases. While many causes of developmental disabilities have been identified, a large number of affected children cannot be diagnosed despite extensive medical testing. Previously unknown genetic factors are likely to be the culprits in many of these cases. Using DNA sequencing, and by sharing information among many doctors and researchers, we have identified a set of individuals with developmental problems who all have changes to the same gene, RALA. The affected individuals all have similar symptoms, including intellectual disability, speech delay (or no speech), and problems with motor skills like walking. In nearly all of these cases (10 of 11), the genetic change found in the child was not inherited from either parent. The locations and biological properties of these changes suggest that they are likely to disrupt the normal functions of RALA. Functional experiments also show that the genetic changes found in these individuals alter two key functions of RALA. Together, we have provided evidence that genetic changes in RALA can cause developmental disabilities. These results will allow doctors and researchers to identify additional children with the same condition, providing a clinical diagnosis to these families and leading to new research opportunities.
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Affiliation(s)
- Susan M. Hiatt
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, United States of America
| | - Matthew B. Neu
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, United States of America
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Ryne C. Ramaker
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, United States of America
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Andrew A. Hardigan
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, United States of America
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Jeremy W. Prokop
- Department of Pediatrics and Human Development, Michigan State University, East Lansing, MI, United States of America
| | - Miroslava Hancarova
- Department of Biology and Medical Genetics, Charles University 2nd Faculty of Medicine and University Hospital Motol, Prague, Czech Republic
| | - Darina Prchalova
- Department of Biology and Medical Genetics, Charles University 2nd Faculty of Medicine and University Hospital Motol, Prague, Czech Republic
| | - Marketa Havlovicova
- Department of Biology and Medical Genetics, Charles University 2nd Faculty of Medicine and University Hospital Motol, Prague, Czech Republic
| | - Jan Prchal
- Laboratory of NMR Spectroscopy, University of Chemistry and Technology, Prague, Czech Republic
| | - Viktor Stranecky
- Department of Pediatrics and Adolescent Medicine, Diagnostic and Research Unit for Rare Diseases, Charles University 1st Faculty of Medicine and General University Hospital, Prague, Czech Republic
| | - Dwight K. C. Yim
- Kaiser Permanente-Hawaii, Honolulu, HI, United States of America
| | - Zöe Powis
- Department of Emerging Genetic Medicine, Ambry Genetics, Aliso Viejo, CA, United States of America
| | - Boris Keren
- Department of Genetics, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Caroline Nava
- Department of Genetics, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Cyril Mignot
- Department of Genetics, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
- Centre de Référence Déficiences Intellectuelles de Causes Rares, Paris, France
- Groupe de Recherche Clinique UPMC "Déficience Intellectuelle et Autisme", Paris, France
| | - Marlene Rio
- Centre de Référence Déficiences Intellectuelles de Causes Rares, Paris, France
- Assistance Publique-Hôpitaux de Paris, service de Génétique, Hôpital Necker-Enfants-Malades, Paris, France
| | - Anya Revah-Politi
- Institute for Genomic Medicine, Columbia University Medical Center, New York, NY, United States of America
| | - Parisa Hemati
- Institute for Genomic Medicine, Columbia University Medical Center, New York, NY, United States of America
| | - Nicholas Stong
- Institute for Genomic Medicine, Columbia University Medical Center, New York, NY, United States of America
| | - Alejandro D. Iglesias
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center, New York, NY, United States of America
| | | | | | | | - Patricia G. Wheeler
- Arnold Palmer Hospital, Division of Genetics, Orlando, FL, United States of America
| | - Lauren Brick
- Department of Genetics, McMaster Children's Hospital, Hamilton, Ontario, Canada
| | - Mariya Kozenko
- Department of Genetics, McMaster Children's Hospital, Hamilton, Ontario, Canada
| | - Anna C. E. Hurst
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - James W. Wheless
- Division of Pediatric Neurology, University of Tennessee Health Science Center, Neuroscience Institute & Le Bonheur Comprehensive Epilepsy Program, Memphis, TN, United States of America
- Le Bonheur Children’s Hospital, Memphis, TN, United States of America
| | - Yves Lacassie
- Division of Clinical Genetics, Louisiana State University Health Sciences Center, New Orleans, LA, United States of America
- Department of Genetics, Children's Hospital, New Orleans, LA, United States of America
| | - Richard M. Myers
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, United States of America
| | - Gregory S. Barsh
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, United States of America
| | - Zdenek Sedlacek
- Department of Biology and Medical Genetics, Charles University 2nd Faculty of Medicine and University Hospital Motol, Prague, Czech Republic
| | - Gregory M. Cooper
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, United States of America
- * E-mail:
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Karnisova L, Marejkova M, Hrbackova H, Mellmann A, Karch H, Fruth A, Drevinek P, Blahova K, Bielaszewska M, Nunvar J. Attack of the clones: whole genome-based characterization of two closely related enterohemorrhagic Escherichia coli O26 epidemic lineages. BMC Genomics 2018; 19:647. [PMID: 30170539 PMCID: PMC6119250 DOI: 10.1186/s12864-018-5045-7] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/27/2018] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Enterohemorrhagic Escherichia coli (EHEC) O26:H11/H-, the most common non-O157 serotype causing hemolytic uremic syndrome worldwide, are evolutionarily highly dynamic with new pathogenic clones emerging rapidly. Here, we investigated the population structure of EHEC O26 isolated from patients in several European countries using whole genome sequencing, with emphasis on a detailed analysis of strains of the highly virulent new European clone (nEC) which has spread since 1990s. RESULTS Genome-wide single nucleotide polymorphism (SNP)-based analysis of 32 EHEC O26 isolated in the Czech Republic, Germany, Austria and Italy demonstrated a split of the nEC (ST29C2 clonal group) into two distinct lineages, which we termed, based on their temporal emergence, as "early" nEC and "late" nEC. The evolutionary divergence of the early nEC and late nEC is marked by the presence of 59 and 70 lineage-specific SNPs (synapomorphic mutations) in the genomes of the respective lineages. In silico analyses of publicly available E. coli O26 genomic sequences identified the late nEC lineage worldwide. Using a PCR designed to target the late nEC synapomorphic mutation in the sen/ent gene, we identified the early nEC decline accompanied by the late nEC rise in Germany and the Czech Republic since 2004 and 2013, respectively. Most of the late nEC strains harbor one of two major types of Shiga toxin 2a (Stx2a)-encoding prophages. The type I stx2a-phage is virtually identical to stx2a-phage of EHEC O104:H4 outbreak strain, whereas the type II stx2a-phage is a hybrid of EHEC O104:H4 and EHEC O157:H7 stx2a-phages and carries a novel mutation in Stx2a. Strains harboring these two phage types do not differ by the amounts and biological activities of Stx2a produced. CONCLUSIONS Using SNP-level analyses, we provide the evidence of the evolutionary split of EHEC O26:H11/H- nEC into two distinct lineages, and a recent replacement of the early nEC by the late nEC in Germany and the Czech Republic. PCR targeting the late nEC synapomorphic mutation in ent/sen enables the discrimination of early nEC strains and late nEC strains in clinical and environmental samples, thereby facilitating further investigations of their geographic distribution, prevalence, clinical significance and epidemiology.
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Affiliation(s)
- Lucia Karnisova
- Department of Paediatrics, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Monika Marejkova
- National Reference Laboratory for E. coli and Shigella, National Institute of Public Health, Prague, Czech Republic
| | - Hana Hrbackova
- Laboratory for Tissue Cultures, National Institute of Public Health, Prague, Czech Republic
| | - Alexander Mellmann
- Institute for Hygiene and the National Consulting Laboratory on Hemolytic Uremic Syndrome, University of Münster, Münster, Germany
| | - Helge Karch
- Institute for Hygiene and the National Consulting Laboratory on Hemolytic Uremic Syndrome, University of Münster, Münster, Germany
| | - Angelika Fruth
- National Reference Center for Salmonella and Other Enteric Pathogens, Robert Koch Institute, Wernigerode, Germany
| | - Pavel Drevinek
- Department of Medical Microbiology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Kveta Blahova
- Department of Paediatrics, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Martina Bielaszewska
- National Reference Laboratory for E. coli and Shigella, National Institute of Public Health, Prague, Czech Republic
| | - Jaroslav Nunvar
- Department of Medical Microbiology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
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Nunvar J, Capek V, Fiser K, Fila L, Drevinek P. What matters in chronic Burkholderia cenocepacia infection in cystic fibrosis: Insights from comparative genomics. PLoS Pathog 2017; 13:e1006762. [PMID: 29228063 PMCID: PMC5739508 DOI: 10.1371/journal.ppat.1006762] [Citation(s) in RCA: 16] [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: 08/25/2017] [Revised: 12/21/2017] [Accepted: 11/19/2017] [Indexed: 01/29/2023] Open
Abstract
Burkholderia cenocepacia causes severe pulmonary infections in cystic fibrosis (CF) patients. Since the bacterium is virtually untreatable by antibiotics, chronic infections persist for years and might develop into fatal septic pneumonia (cepacia syndrome, CS). To devise new strategies to combat chronic B. cenocepacia infections, it is essential to obtain comprehensive knowledge about their pathogenesis. We conducted a comparative genomic analysis of 32 Czech isolates of epidemic clone B. cenocepacia ST32 isolated from various stages of chronic infection in 8 CF patients. High numbers of large-scale deletions were found to occur during chronic infection, affecting preferentially genomic islands and nonessential replicons. Recombination between insertion sequences (IS) was inferred as the mechanism behind deletion formation; the most numerous IS group was specific for the ST32 clone and has undergone transposition burst since its divergence. Genes functionally related to transition metal metabolism were identified as hotspots for deletions and IS insertions. This functional category was also represented among genes where nonsynonymous point mutations and indels occurred parallelly among patients. Another category exhibiting parallel mutations was oxidative stress protection; mutations in catalase KatG resulted in impaired detoxification of hydrogen peroxide. Deep sequencing revealed substantial polymorphism in genes of both categories within the sputum B. cenocepacia ST32 populations, indicating extensive adaptive evolution. Neither oxidative stress response nor transition metal metabolism genes were previously reported to undergo parallel evolution during chronic CF infection. Mutations in katG and copper metabolism genes were overrepresented in patients where chronic infection developed into CS. Among professional phagocytes, macrophages use both hydrogen peroxide and copper for their bactericidal activity; our results thus tentatively point to macrophages as suspects in pathogenesis towards the fatal CS. The large Burkholderia cenocepacia populations which persist in cystic fibrosis lungs during many years of chronic infections have an inherent potential for adaptive evolution. The results provided by comparative genomics are key in understanding the processes involved. Mutational events which have taken place allow us to deductively reconstruct the history of chronic infection and to identify driving forces acting upon the bacteria. Beyond the conventional point mutation analysis of next generation sequencing data, we observed interesting phenomena such as large deletions and transposable element movement which represent another facet of adaptive evolution of B. cenocepacia during chronic infection. We also found, unexpectedly, that adaptive evolution in B. cenocepacia strain ST32 affects a set of genes conspicuously different from related species B. dolosa; these appear to be linked to host immune response. Our study provides clues to the complex puzzle of chronic B. cenocepacia infection establishment, persistence and outcome in cystic fibrosis.
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Affiliation(s)
- Jaroslav Nunvar
- Department of Medical Microbiology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Vaclav Capek
- Bioinformatics Centre, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Karel Fiser
- Department of Paediatric Haematology and Oncology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Libor Fila
- Department of Pneumology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Pavel Drevinek
- Department of Medical Microbiology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
- * E-mail:
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Sramko M, Wichterle D, Kautzner J. Feasibility of In-Vivo Simulation of Acute Hemodynamics in Human Atrial Fibrillation. PLoS One 2016; 11:e0165241. [PMID: 27764240 PMCID: PMC5072830 DOI: 10.1371/journal.pone.0165241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 06/27/2016] [Accepted: 10/07/2016] [Indexed: 11/18/2022] Open
Abstract
This study evaluated hemodynamic feasibility and reproducibility of a new method for in vivo simulation of human atrial fibrillation (AF). The method was tested during sinus rhythm in 10 patients undergoing catheter ablation for AF. A simple electronic device was assembled that allowed triggering a cardiac stimulator by predefined series of RR intervals. Irregular RR interval sequences with a mean heart rate of 90/min and 130/min were obtained from ECG recordings of another patients with AF. Simultaneous atrioventricular pacing was delivered by catheters placed inside the coronary sinus and at the His bundle region. Hemodynamic effect of the simulated AF was assessed by invasive measurement of the left ventricular (LV) pressure, dP/dt, and Tau. Compared to regular pacing at the same mean heart rate, the simulated AF significantly impaired the LV both systolic and diastolic function. Repeated AF pacing in the same patients generated similar LV hemodynamics. The proposed method provides a realistic and reproducible in-vivo model of AF. It can be exploited for investigation of the hemodynamic consequences of AF in various patient populations.
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Affiliation(s)
- Marek Sramko
- Department of Cardiology, Institute for Clinical and Experimental Medicine (IKEM), Prague, Czech Republic
- * E-mail:
| | - Dan Wichterle
- Department of Cardiology, Institute for Clinical and Experimental Medicine (IKEM), Prague, Czech Republic
| | - Josef Kautzner
- Department of Cardiology, Institute for Clinical and Experimental Medicine (IKEM), Prague, Czech Republic
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Movsisyan NK, Sochor O, Kralikova E, Cifkova R, Ross H, Lopez-Jimenez F. Current and past smoking patterns in a Central European urban population: a cross-sectional study in a high-burden country. BMC Public Health 2016; 16:571. [PMID: 27417391 PMCID: PMC4946191 DOI: 10.1186/s12889-016-3216-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 06/15/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Many studies have examined the socioeconomic variations in smoking and quitting rates across the European region; however, data from Central and East European countries, where the tobacco burden is especially high, are sparse. This study aimed to assess the patterns in current and past smoking prevalence based on cross-sectional data from a Central European urban population sample. METHODS Data from 2160 respondents aged 25-64 years in Brno, Czech Republic were collected in 2013-2014 using the Czech post-MONICA survey questionnaire to assess the prevalence of cardiovascular risk factors, including smoking status. The age- and sex-stratified randomized sample was drawn using health insurance registries. Descriptive statistics and quit ratios were calculated, and chi-square and multivariate logistic analyses conducted to examine relationships between current and past smoking and demographic (age, gender, marital status) and socioeconomic variables (education, income, occupation). RESULTS The prevalence of current and past smoking was 23.6 and 31.3 % among men and 20.5 and 23.2 % among women, respectively. Education reliably predicted smoking and quitting rates in both genders. Among men, being unemployed was associated with greater odds of smoking (OR 3.6; 1.6-8.1) and lower likelihood of quitting (OR 0.2: 0.1-0.6); the likelihood of quitting also increased with age (OR 1.8; 1.2-2.8). Among women, marital status (being married) decreased the odds of current smoking (OR 0.6; 0.4-0.9) and increased the odds of quitting (OR 2.2; 1.2-3.9). Quit ratios were the lowest in the youngest age group (25-34 years) where quitting was more strongly associated with middle income (OR 2.7; 95 % CI 1.2-5.9) than with higher education (OR 2.9; 95 % CI 0.9-8.2). CONCLUSIONS Interventions to increase cessation rates and reduce smoking prevalence need to be gender-specific and carefully tailored to the needs of the disadvantaged groups of the population, especially the less well-off young adults. Future studies should examine the equity impact of the tobacco control policies and be inclusive of the Central and East European countries.
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Affiliation(s)
- Narine K. Movsisyan
- />International Clinical Research Center, St. Anne’s University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
| | - Ondrej Sochor
- />International Clinical Research Center, St. Anne’s University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
- />International Clinical Research Center, Department of Cardiovascular Diseases, St. Anne’s University Hospital Brno, Masaryk University, Brno, Czech Republic
- />Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN USA
| | - Eva Kralikova
- />International Clinical Research Center, St. Anne’s University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
- />Institute of Hygiene and Epidemiology, First Faculty of Medicine of Charles University and General University Hospital, Prague, Czech Republic
- />Centre for Tobacco Dependence of the 3rd Medical Department, First Faculty of Medicine of Charles University and General University Hospital, Prague, Czech Republic
| | - Renata Cifkova
- />International Clinical Research Center, St. Anne’s University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
- />Center for Cardiovascular Prevention of the First Faculty of Medicine, Charles University and Thomayer Hospital, Prague, Czech Republic
| | - Hana Ross
- />International Clinical Research Center, St. Anne’s University Hospital Brno, Pekarska 53, 656 91 Brno, Czech Republic
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