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Guillamot M, Subudhi I, Paraskevopoulou V, Prystupa A, Sidhu I, Yeaton A, Laskou M, Hannemann C, Donahoe C, Wiseman D, Aifantis I, Naik S, Weinstock A. Interferon-sensitized hematopoietic progenitors dynamically alter organismal immunity. bioRxiv 2024:2024.04.24.590828. [PMID: 38712060 PMCID: PMC11071608 DOI: 10.1101/2024.04.24.590828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Inflammation has enduring impacts on organismal immunity. However, the precise mechanisms by which tissue-restricted inflammation conditions systemic responses are poorly understood. Here, we leveraged a highly compartmentalized model of skin inflammation and identified a surprising type I interferon (IFN)- mediated activation of hematopoietic stem/progenitor cells (HSPCs) that results in profound changes to systemic host responses. Post-inflamed mice were protected from atherosclerosis and had worse outcomes following influenza virus infection. This IFN-mediated HSPC modulation was dependent on IFNAR signaling and could be recapitulated with the administration of recombinant IFNα. Importantly, the transfer of post-inflamed HSPCs was sufficient to transmit the immune suppression phenotype. IFN modulation of HSPCs was rooted both in long-term changes in chromatin accessibility and the emergence of an IFN- responsive functional state from multiple progenitor populations. Collectively, our data reveal the profound and enduring effect of transient inflammation and more specifically type I IFN signaling and set the stage for a more nuanced understanding of HSPC functional modulation by peripheral immune signals.
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Katsiari M, Mavroidi A, Kesesidis N, Palla E, Zourla K, Ntorlis K, Konstantinidis K, Laskou M, Strigklis K, Sakkalis A, Nikolaou C, Platsouka ED, Karakasiliotis I, Vrioni G, Tsakris A. Emergence of Clonally-Related South Asian Clade I Clinical Isolates of Candida auris in a Greek COVID-19 Intensive Care Unit. J Fungi (Basel) 2023; 9:jof9020243. [PMID: 36836357 PMCID: PMC9964037 DOI: 10.3390/jof9020243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/05/2023] [Accepted: 02/08/2023] [Indexed: 02/15/2023] Open
Abstract
Candida auris has recently emerged as a multidrug-resistant yeast implicated in various healthcare-associated invasive infections and hospital outbreaks. In the current study, we report the first five intensive care unit (ICU) cases affected by C. auris isolates in Greece, during October 2020-January 2022. The ICU of the hospital was converted to a COVID-19 unit on 25 February 2021, during the third wave of COVID-19 in Greece. Identification of the isolates was confirmed by Matrix Assisted Laser Desorption Ionization Time of Flight mass spectroscopy (MALDI-TOF]. Antifungal susceptibility testing was performed by the EUCAST broth microdilution method. Based on the tentative CDC MIC breakpoints, all five C. auris isolates were resistant to fluconazole (≥32 μg/mL), while three of them exhibited resistance to amphotericin B (≥2 μg/mL). The environmental screening also revealed the dissemination of C. auris in the ICU. Molecular characterization of C. auris clinical and environmental isolates was performed by MultiLocus Sequence Typing (MLST) of a set of four genetic loci, namely ITS, D1/D2, RPB1 and RPB2, encoding for the internal transcribed spacer region (ITS) of the ribosomal subunit, the large ribosomal subunit region and the RNA polymerase II largest subunit, respectively. MLST analysis showed that all isolates possessed identical sequences in the four genetic loci and clustered with the South Asian clade I strains. Additionally, PCR amplification and sequencing of the CJJ09_001802 genetic locus, encoding for the "nucleolar protein 58" that contains clade-specific repeats was performed. Sanger sequence analysis of the TCCTTCTTC repeats within CJJ09_001802 locus also assigned the C. auris isolates to the South Asian clade I. Our study confirms that C. auris is an emerging yeast pathogen in our region, especially in the setting of the ongoing COVID-19 worldwide pandemic. Adherence to strict infection control is needed to restrain further spread of the pathogen.
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Affiliation(s)
- Maria Katsiari
- Intensive Care Unit, Konstantopouleio-Patission General Hospital, 14233 Athens, Greece
| | - Angeliki Mavroidi
- Department of Microbiology, Konstantopouleio-Patission General Hospital, 14233 Athens, Greece
| | - Nikolaos Kesesidis
- Laboratory of Biology, Department of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
| | - Eleftheria Palla
- Department of Microbiology, Konstantopouleio-Patission General Hospital, 14233 Athens, Greece
| | - Konstantina Zourla
- Department of Microbiology, Konstantopouleio-Patission General Hospital, 14233 Athens, Greece
| | - Kyriakos Ntorlis
- Intensive Care Unit, Konstantopouleio-Patission General Hospital, 14233 Athens, Greece
| | - Konstantinos Konstantinidis
- Laboratory of Biology, Department of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
| | - Maria Laskou
- Intensive Care Unit, Konstantopouleio-Patission General Hospital, 14233 Athens, Greece
| | | | - Anastasios Sakkalis
- Intensive Care Unit, Konstantopouleio-Patission General Hospital, 14233 Athens, Greece
| | - Charikleia Nikolaou
- Intensive Care Unit, Konstantopouleio-Patission General Hospital, 14233 Athens, Greece
| | - Evangelia D. Platsouka
- Department of Microbiology, Konstantopouleio-Patission General Hospital, 14233 Athens, Greece
| | - Ioannis Karakasiliotis
- Laboratory of Biology, Department of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
| | - Georgia Vrioni
- Department of Microbiology, Medical School, National and Kapodistrian University of Athens, 75 MikrasAsias Street, 11527 Athens, Greece
| | - Athanasios Tsakris
- Department of Microbiology, Medical School, National and Kapodistrian University of Athens, 75 MikrasAsias Street, 11527 Athens, Greece
- Correspondence: ; Tel.: +30-210-7462011
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Dialynaki D, Stavropoulou A, Laskou M, Alexandraki D. The essential liaison of two copper proteins: the Cu-sensing transcription factor Mac1 and the Cu/Zn superoxide dismutase Sod1 in Saccharomyces cerevisiae. Curr Genet 2023; 69:41-53. [PMID: 36456733 DOI: 10.1007/s00294-022-01258-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 10/30/2022] [Accepted: 11/07/2022] [Indexed: 12/04/2022]
Abstract
Although copper is an essential trace element for cell function and viability, its excess can lead to protein oxidation, DNA cleavage, and ultimate cell damage. Cells have established a variety of regulatory mechanisms to ensure copper ion homeostasis. In Saccharomyces cerevisiae, copper sensing and response to copper deficiency are regulated by the transcription factor Mac1. Our group has previously reported that in addition to copper, several chromatin proteins modulate Mac1 functionality. In this study, based on a synthetic growth deficiency phenotype, we showed that the Cu/Zn superoxide dismutase Sod1 plays an important role in Mac1 transcriptional activity, in unchallenged nutrient-rich growth conditions. Sod1 is a multipotent cytoplasmic and mitochondrial enzyme, whose main known function is to detoxify the cell from superoxide ions. It has been previously reported that Sod1 also enters the nucleus and affects the transcription of several genes, some of which are involved in copper homeostasis under Cu-depleted (Wood and Thiele in J Biol Chem 284:404-413, 2009) or only under specific oxidative stress conditions (Dong et al. Mol Cell Biol 33:4041-4050, 2013; Tsang et al. Nar Commun 8:3446, 2014). We have shown that Sod1 physically interacts with Mac1 transcription factor and is important for the transactivation as well as its DNA-binding activities. On the other hand, a constitutively active mutant of Mac1 is not affected functionally by the Sod1 ablation, pointing out that Sod1 contributes to the maintenance of the copper-unchelated state of Mac1. In conclusion, we showed that Sod1-Mac1 interaction is vital for Mac1 functionality, regardless of copper medium deficiency, in unchallenged growth conditions, and we suggest that Sod1 enzymatic activity may modify the redox state of the cysteine-rich motifs in the Mac1 DNA-binding and transactivation domains.
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Affiliation(s)
- Dimitra Dialynaki
- Department of Biology, University of Crete, Vasilika Vouton, P. O. Box 2208, 70013, Heraklion, Crete, Greece
| | - Athanasia Stavropoulou
- Department of Biology, University of Crete, Vasilika Vouton, P. O. Box 2208, 70013, Heraklion, Crete, Greece.,Computational Genomics Group, Biomedical Sciences Research Center "Alexander Fleming", 16672, Athens, Greece
| | - Maria Laskou
- Department of Biology, University of Crete, Vasilika Vouton, P. O. Box 2208, 70013, Heraklion, Crete, Greece.,NYU Langone Health, NYU Grossman School of Medicine, 435 E 30th Street, Science Building 1305, New York, NY, 10016, USA
| | - Despina Alexandraki
- Department of Biology, University of Crete, Vasilika Vouton, P. O. Box 2208, 70013, Heraklion, Crete, Greece. .,Institute of Molecular Biology & Biotechnology, Foundation for Research and Technology-Hellas, N. Plastira 100, 70013, Heraklion, Crete, Greece.
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Daskalaki MG, Bafiti P, Kikionis S, Laskou M, Roussis V, Ioannou E, Kampranis SC, Tsatsanis C. Disulfides from the Brown Alga Dictyopteris membranacea Suppress M1 Macrophage Activation by Inducing AKT and Suppressing MAPK/ERK Signaling Pathways. Mar Drugs 2020; 18:E527. [PMID: 33114361 PMCID: PMC7690855 DOI: 10.3390/md18110527] [Citation(s) in RCA: 3] [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: 09/23/2020] [Revised: 10/20/2020] [Accepted: 10/22/2020] [Indexed: 12/13/2022] Open
Abstract
Inflammation is part of the organism's response to deleterious stimuli, such as pathogens, damaged cells, or irritants. Macrophages orchestrate the inflammatory response obtaining different activation phenotypes broadly defined as M1 (pro-inflammatory) or M2 (homeostatic) phenotypes, which contribute to pathogen elimination or disease pathogenesis. The type and magnitude of the response of macrophages are shaped by endogenous and exogenous factors and can be affected by nutrients or therapeutic agents. Multiple studies have shown that natural products possess immunomodulatory properties and that marine algae contain products with such action. We have previously shown that disulfides isolated from Dictyopteris membranacea suppress nitric oxide (NO) production from activated macrophages, suggesting potential anti-inflammatory actions. In this study, we investigated the anti-inflammatory mechanism of action of bis(5-methylthio-3-oxo-undecyl) disulfide (1), 5-methylthio-1-(3-oxo-undecyl) disulfanylundecan-3-one (2) and 3-hexyl-4,5-dithiocycloheptanone (3). Our results showed that all three compounds inhibited M1 activation of macrophages by down regulating the production of pro-inflammatory cytokines TNFα, IL-6 and IL-12, suppressed the expression of the NO converting enzyme iNOS, and enhanced expression of the M2 activation markers Arginase1 and MRC1. Moreover, disulfides 1 and 2 suppressed the expression of glucose transporters GLUT1 and GLUT3, suggesting that compounds 1 and 2 may affect cell metabolism. We showed that this was due to AKT/MAPK/ERK signaling pathway modulation and specifically by elevated AKT phosphorylation and MAPK/ERK signal transduction reduction. Hence, disulfides 1-3 can be considered as potent candidates for the development of novel anti-inflammatory molecules with homeostatic properties.
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Affiliation(s)
- Maria G Daskalaki
- Laboratory of Clinical Chemistry, School of Medicine, University of Crete, 70013 Heraklion, Greece
- Institute of Molecular Biology and Biotechnology, FORTH, 71100 Heraklion, Greece
| | - Paraskevi Bafiti
- Laboratory of Clinical Chemistry, School of Medicine, University of Crete, 70013 Heraklion, Greece
| | - Stefanos Kikionis
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zographou, 15771 Athens, Greece
| | - Maria Laskou
- Laboratory of Clinical Chemistry, School of Medicine, University of Crete, 70013 Heraklion, Greece
| | - Vassilios Roussis
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zographou, 15771 Athens, Greece
| | - Efstathia Ioannou
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zographou, 15771 Athens, Greece
| | - Sotirios C Kampranis
- Section of Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
| | - Christos Tsatsanis
- Laboratory of Clinical Chemistry, School of Medicine, University of Crete, 70013 Heraklion, Greece
- Institute of Molecular Biology and Biotechnology, FORTH, 71100 Heraklion, Greece
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Katsiari M, Apostolakou E, Nikolaou C, Pagouni E, Tsimpoukas F, Mainas E, Kounougeri E, Laskou M, Maguina A. Ventilator-associated pneumonia in a Greek ICU: prevalence and etiology. Crit Care 2009. [PMCID: PMC4084183 DOI: 10.1186/cc7461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Katsiari M, Laskou M, Roussou Z, Mihalopoulou A, Haramoglis S, Maguina N. A 61-year Old Immunocompromised Man with Disseminated Cryptococcosis. Int J Infect Dis 2008. [DOI: 10.1016/s1201-9712(08)60111-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Fortis A, Mathas C, Laskou M, Kolias S, Maguina N. Therapeutic Intervention Scoring System-28 as a tool of post ICU outcome prognosis and prevention. Minerva Anestesiol 2004; 70:71-81. [PMID: 14765047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
AIM To examine the effects of severity upon discharge from Intensive Care Unit (ICU) status, as assessed by the Therapeutic Intervention Scoring System-28 (TISS-28) on subsequent post ICU outcome. METHODS One-year retrospective observational study. Six bed general ICU in a general hospital with no High Dependency ICU unit (HDU) available. We used data from all patients admitted to the ICU. From all discharged patients, data on mean length of ICU stay, APACHE II upon admission and TISS-28 upon discharge were collected. RESULTS Eighty-six patients, mean age 63.2, were discharged to hospital wards between January 1999 and December 1999. Age is a significant factor to contribute to outcome prediction, (p=0.0478). TISS-28 is statistically significant related to survival status. Thirteen patients that did not survive had higher TISS-28 values (p=0.0032). Length of ICU stay has a borderline association (p=0.063) with survival. CONCLUSION Patients discharged from ICU have post ICU hospital length of stay and prognosis related to their age, time of hospitalization in ICU and their severity status upon discharge from the ICU. We believe that, based on the TISS-28 scoring system, high risk patients can be identified and either ideally transferred to a HDU or discharged from ICU when further improvement has been achieved. TIS-28 is a valuable tool in post ICU outcome prediction and subsequently, in hospital mortality reduction. At the same time, through TISS-28 use, each hospital can locally identify the quality of care provided outside the ICU, given the outcomes measured in groups of patients at various severity levels.
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Affiliation(s)
- A Fortis
- Intensive Care Unit, Konstantopouleion General Hospital, Nea Ionia, Athens, Greece.
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Kolias S, Nikolaou H, Eleftheriadi P, Sakarelou N, Fortis A, Laskou M, Maguina N. Measurement of serum transferrin receptor (sTfR) in critically ill patients. Crit Care 2001. [PMCID: PMC3333295 DOI: 10.1186/cc1175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Ferdianakis K, Laskou M, Spyrou L. Lingual arch appliance fabrication in the dental office. J Clin Pediatr Dent 1998; 22:277-80. [PMID: 9796495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
Lingual arch is a mandibular fixed bilateral space maintaining appliance. It prevents the first permanent molar from drifting forward and preserves the available space, especially the leeway space in mixed dentition cases. The purpose of the present article is to present a simplified way of lingual arch appliance fabrication in the dental office, which will result in effective space maintenance and time savings for both the patient and the dentist.
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Affiliation(s)
- K Ferdianakis
- Department of Pediatric Dentistry, Tufts University School of Dental Medicine, Boston, MA 02111, USA
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