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Feng YH, Guo WW, Wang YR, Shi WX, Liu C, Li DM, Qiu Y, Shi DM. Rhinocerebral mucormycosis caused by Rhizopus oryzae in a patient with acute myeloid leukemia: A case report. World J Dermatol 2020; 8:1-9. [DOI: 10.5314/wjd.v8.i1.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 05/29/2020] [Accepted: 06/20/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Rhinocerebral mucormycosis (RCM) is a rare fatal fungal infection which is on the increase among immunocompromised hosts such as patients who have had hematological cancers, or have received immunosuppressive drugs, corticosteroids, or other T cell suppressing agents.
CASE SUMMARY We report a case of RCM caused by Rhizopus oryzae, one of the most common opportunistic pathogens, in a patient suffering from a fourth relapse of acute myeloid leukemia. The patient developed RCM after he had received long-term antibiotic agents and corticosteroids. The pathogen was isolated three times from nasal secretions collected from the deep parts of the nasal cavity and was identified by morphology and internal transcribed spacer sequencing. Blood infection was excluded by droplet digital polymerase chain reaction and blood culture. The patient was empirically treated with caspofungin and voriconazole for several days while the lesions continued to progress. The patient was given amphotericin B in combination with caspofungin after RCM was suspected, and the lesions improved over the course of treatment, which lasted several days. However, the patient eventually died of the primary disease.
CONCLUSION This case indicates that immunosuppressive drugs, including corticosteroids and antimetabolites in hematological tumor, do increase the risk of infections of this type. Early diagnosis, prompt and frequent surgical debridement, and treatment with amphotericin B without delay are all essential in combatting RCM.
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Affiliation(s)
- Ya-Hui Feng
- Department of Clinical Medicine, Jining Medical University, Jining 272067, Shandong Province, China
| | - Wen-Wen Guo
- Department of Hematology, Jining No. 1 People’s Hospital, Jining 272067, Shandong Province, China
| | - Ya-Ru Wang
- Department of Dermatology, Jining No. 1 People’s Hospital, Jining 272067, Shandong Province, China
| | - Wen-Xia Shi
- Department of Clinical Medicine, Jining Medical University, Jining 272067, Shandong Province, China
| | - Chen Liu
- Laboratory of Clinical Mycology, Jining No. 1 People’s Hospital, Jining 272067, Shandong Province, China
| | - Dong-Mei Li
- Medical Center, Georgetown University, Washington, DC 20057, United States
| | - Ying Qiu
- Department of Dermatology, Jining No. 1 People’s Hospital, Jining 272067, Shandong Province, China
| | - Dong-Mei Shi
- Laboratory of Medical Mycology, Department of Dermatology, Jining No. 1 People’s Hospital, Jining 272067, Shandong Province, China
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Abstract
Animal models of erythropoiesis have been, and will continue to be, important tools for understanding molecular mechanisms underlying the development of this cell lineage and the pathophysiology associated with various human erythropoietic diseases. In this regard, the mouse is probably the most valuable animal model available to investigators. The physiology and short gestational period of mice make them ideal for studying developmental processes and modeling human diseases. These attributes, coupled with cutting-edge genetic tools such as transgenesis, gene knockouts, conditional gene knockouts, and genome editing, provide a significant resource to the research community to test a plethora of hypotheses. This review summarizes the mouse models available for studying a wide variety of erythroid-related questions, as well as the properties inherent in each one.
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Nanou A, Toumpeki C, Lavigne MD, Lazou V, Demmers J, Paparountas T, Thanos D, Katsantoni E. The dual role of LSD1 and HDAC3 in STAT5-dependent transcription is determined by protein interactions, binding affinities, motifs and genomic positions. Nucleic Acids Res 2016; 45:142-154. [PMID: 27651463 PMCID: PMC5224505 DOI: 10.1093/nar/gkw832] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 09/08/2016] [Accepted: 09/11/2016] [Indexed: 12/31/2022] Open
Abstract
STAT5 interacts with other factors to control transcription, and the mechanism of regulation is of interest as constitutive active STAT5 has been reported in malignancies. Here, LSD1 and HDAC3 were identified as novel STAT5a interacting partners in pro-B cells. Characterization of STAT5a, LSD1 and HDAC3 target genes by ChIP-seq and RNA-seq revealed gene subsets regulated by independent or combined action of the factors and LSD1/HDAC3 to play dual role in their activation or repression. Genes bound by STAT5a alone or in combination with weakly associated LSD1 or HDAC3 were enriched for the canonical STAT5a GAS motif, and such binding induced activation or repression. Strong STAT5 binding was seen more frequently in intergenic regions, which might function as distal enhancer elements. Groups of genes bound weaker by STAT5a and stronger by LSD1/HDAC3 showed an absence of the GAS motif, and were differentially regulated based on their genomic binding localization and binding affinities. These genes exhibited increased binding frequency in promoters, and in conjunction with the absence of GAS sites, the data indicate a requirement for stabilization by additional factors, which might recruit LSD1/HDAC3. Our study describes an interaction network of STAT5a/LSD1/HDAC3 and a dual function of LSD1/HDAC3 on STAT5-dependent transcription, defined by protein–protein interactions, genomic binding localization/affinity and motifs.
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Affiliation(s)
- Aikaterini Nanou
- Basic Research Center, Biomedical Research Foundation, Academy of Athens, Soranou tou Ephessiou 4, 115 27 Athens, Greece
| | - Chrisavgi Toumpeki
- Basic Research Center, Biomedical Research Foundation, Academy of Athens, Soranou tou Ephessiou 4, 115 27 Athens, Greece
| | - Matthieu D Lavigne
- Basic Research Center, Biomedical Research Foundation, Academy of Athens, Soranou tou Ephessiou 4, 115 27 Athens, Greece
| | - Vassiliki Lazou
- Basic Research Center, Biomedical Research Foundation, Academy of Athens, Soranou tou Ephessiou 4, 115 27 Athens, Greece
| | - Jeroen Demmers
- Proteomics Center, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Triantafillos Paparountas
- Basic Research Center, Biomedical Research Foundation, Academy of Athens, Soranou tou Ephessiou 4, 115 27 Athens, Greece
| | - Dimitris Thanos
- Basic Research Center, Biomedical Research Foundation, Academy of Athens, Soranou tou Ephessiou 4, 115 27 Athens, Greece
| | - Eleni Katsantoni
- Basic Research Center, Biomedical Research Foundation, Academy of Athens, Soranou tou Ephessiou 4, 115 27 Athens, Greece
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Theodorou M, Speletas M, Mamara A, Papachristopoulou G, Lazou V, Scorilas A, Katsantoni E. Identification of a STAT5 target gene, Dpf3, provides novel insights in chronic lymphocytic leukemia. PLoS One 2013; 8:e76155. [PMID: 24155890 PMCID: PMC3796511 DOI: 10.1371/journal.pone.0076155] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 08/20/2013] [Indexed: 12/31/2022] Open
Abstract
STAT5 controls essential cellular functions and is encoded by two genes, Stat5a and Stat5b. To provide insight to the mechanisms linking hematologic malignancy to STAT5 activation/regulation of target genes, we identified STAT5 target genes and focused on Dpf3 gene, which encodes for an epigenetic factor. Dpf3 expression was induced upon IL-3 stimulation in Ba/F3 cells, while strong binding of both STAT5a and STAT5b was detected in its promoter. Reduced expression of Dpf3 was detected in Ba/F3 cells with Stat5a and Stat5b knock-down, suggesting that this gene is positively regulated by STAT5, upon IL-3 stimulation. Furthermore, this gene was significantly up-regulated in CLL patients, where DPF3 gene/protein up-regulation and strong STAT5 binding to the DPF3 promoter, correlated with increased STAT5 activation, mainly in non-malignant myeloid cells (granulocytes). Our findings provide insights in the STAT5 dependent transcriptional regulation of Dpf3, and demonstrate for the first time increased STAT5 activation in granulocytes of CLL patients. Novel routes of investigation are opened to facilitate the understanding of the role of STAT5 activation in the communication between non-malignant myeloid and malignant B-cells, and the functions of STAT5 target genes networks in CLL biology.
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Affiliation(s)
- Marina Theodorou
- Hematology/Oncology Division, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Matthaios Speletas
- Department of Immunology and Histocompatibility, Medical School, University of Thessaly, Larissa, Greece
| | - Antigoni Mamara
- Department of Immunology and Histocompatibility, Medical School, University of Thessaly, Larissa, Greece
| | - Georgia Papachristopoulou
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Athens, Athens, Greece
| | - Vassiliki Lazou
- Hematology/Oncology Division, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Andreas Scorilas
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Athens, Athens, Greece
| | - Eleni Katsantoni
- Hematology/Oncology Division, Biomedical Research Foundation, Academy of Athens, Athens, Greece
- * E-mail:
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Gazouli M, Katsantoni E, Kosteas T, Anagnou NP. Persistent fetal gamma-globin expression in adult transgenic mice following deletion of two silencer elements located 3' to the human Agamma-globin gene. Mol Med 2009; 15:415-24. [PMID: 19690621 DOI: 10.2119/molmed.2009.00019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Accepted: 08/10/2009] [Indexed: 12/19/2022] Open
Abstract
Natural deletions of the human gamma-globin gene cluster lead to specific syndromes characterized by increased production of fetal hemoglobin in adult life and provide a useful model to delineate novel cis-acting elements involved in the developmental control of hemoglobin switching. A hypothesis accounting for these phenotypic features assumes that silencers located within the Agamma-to delta-gene region are deleted in hereditary persistence of fetal hemoglobin (HPFH) and deltabeta-thalassemias, leading to failure of switching. In the present study, we sought to clarify the in vivo role of two elements, termed Enh and F, located 3' to the Agamma-globin, in silencing the fetal genes. To this end, we generated three transgenic lines using cosmid constructs containing the full length of the globin locus control region (LCR) linked to the 3.3-kb Agamma-gene lacking both the Enh and F elements. The Enh/F deletion resulted in high levels of Agamma-globin gene expression in adult mice in all single copy lines, whereas, the LCR-Agamma single copy lines which retain the Enh and F elements exhibited complete normal switching of the fetal Agamma-gene. Our study documents directly for the first time the in vivo role of these two gene-proximal negative regulatory elements in silencing the fetal globin gene in the perinatal period, and thus these data may permit their eventual exploitation in therapeutic approaches for thalassemias.
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Affiliation(s)
- Maria Gazouli
- Laboratory of Biology, University of Athens School of Medicine, Athens, Greece
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Katsantoni EZ, Anghelescu NE, Rottier R, Moerland M, Antoniou M, de Crom R, Grosveld F, Strouboulis J. Ubiquitous expression of the rtTA2S-M2 inducible system in transgenic mice driven by the human hnRNPA2B1/CBX3 CpG island. BMC DEVELOPMENTAL BIOLOGY 2007; 7:108. [PMID: 17900353 PMCID: PMC2080639 DOI: 10.1186/1471-213x-7-108] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2007] [Accepted: 09/27/2007] [Indexed: 11/30/2022]
Abstract
Background A sensitive, ubiquitously expressed tetracycline inducible system would be a valuable tool in mouse transgenesis. However, this has been difficult to obtain due to position effects observed at different chromosomal sites of transgene integration, which negatively affect expression in many tissues. The aim of this study was to test the utility of a mammalian methylation-free CpG island to drive ubiquitous expression of the sensitive doxycycline (Dox) inducible rtTA2S-M2 Tet-transactivator in transgenic mice. Results An 8 kb genomic fragment from the methylation-free CpG island of the human hnRNPA2B1-CBX3 housekeeping gene locus was tested. In a number of transgenic mouse lines obtained, rtTA2S-M2 expression was detected in many tissues examined. Characterisation of the highest expressing rtTA2S-M2 transgenic mouse line demonstrated Dox-inducible GFP transgene expression in many tissues. Using this line we also show highly sensitive quantitative induction with low doses of Dox of an assayable plasma protein transgene under the control of a Tet Responsive Element (TRE). The utility of this rtTA2S-M2 line for inducible expression in mouse embryos was also demonstrated using a GATA-6 Tet-inducible transgene to show specific phenotypes in the embryonic lung, as well as broader effects resulting from the inducible widespread overexpression of the transgene. Conclusion The ubiquitously expressing rtTA2S-M2 transgenic mouse line described here provides a very useful tool for studying the effects of the widespread, inducible overexpression of genes during embryonic development and in adult mice.
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Affiliation(s)
- Eleni Z Katsantoni
- Department of Cell Biology, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
- Hematology Division, Biomedical Research Foundation, Academy of Athens, 4 Soranou Ephesiou, 115 27 Athens, Greece
| | - Nora E Anghelescu
- Department of Cell Biology, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
- Gene Controls Mechanism and Disease, MRC Clinical Sciences Centre, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK
| | - Robbert Rottier
- Department of Cell Biology, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Matthijs Moerland
- Department of Cell Biology, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Michael Antoniou
- Nuclear Biology Group, Division of Medical and Molecular Genetics, GKT School of Medicine, King's College London, Guy's Hospital, London SE1 9RT, UK
| | - Rini de Crom
- Department of Cell Biology, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Frank Grosveld
- Department of Cell Biology, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
| | - John Strouboulis
- Department of Cell Biology, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
- Institute of Molecular Oncology, BSRC "Alexander Fleming", PO Box 74145, 166 02 Varkiza, Greece
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