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Ambrico M, Ambrico PF, De Marco L, Iacobellis R, D'Abramo A, Ligonzo T. Role of direct and inverted undoped spiro-OMeTAD-perovskite architectures in determining solar cells performances: an investigation via electrical impedance spectroscopy. Phys Chem Chem Phys 2019; 21:6613-6621. [PMID: 30855066 DOI: 10.1039/c9cp00564a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present study involved an investigation on the reasoning behind the dependence of the perovskite solar cells photovoltaic efficiencies on the relative position of the undoped spiro-OMeTAD hole-transport material with respect to the perovskite in the device. We adopted impedance spectroscopy to investigate the modification of the carrier transport mechanisms across the spiro-OMeTAD/perovskite interface constituting the active part where the main device processes occur. We investigated two interface structures, referred to as the direct (or regular, n-i-p) and the inverted (p-i-n) configuration. This work also intended to further stress the possible adoption of alternative device structures working with undoped hole-transport materials.
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Affiliation(s)
- Marianna Ambrico
- CNR Istituto di Nanotecnologia, Via Amendola, 122/D I-70127 Bari, Italy.
| | - Paolo F Ambrico
- CNR Istituto di Nanotecnologia, Via Amendola, 122/D I-70127 Bari, Italy.
| | - Luisa De Marco
- CNR Istituto di Nanotecnologia, Via Monteroni, Lecce, Italy
| | | | - Arianna D'Abramo
- Dipartimento Interateneo di Fisica M. Merlin, Universita' degli Studi di Bari, Italy
| | - Teresa Ligonzo
- Dipartimento Interateneo di Fisica M. Merlin, Universita' degli Studi di Bari, Italy
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Carillo C, Pecoraro Y, Anile M, Mantovani S, Oliva A, D'Abramo A, Amore D, Pagini A, De Giacomo T, Pugliese F, Rendina EA, Venuta F, Diso D. Evaluation of Renal Function in Patients Undergoing Lung Transplantation. Transplant Proc 2017; 49:699-701. [PMID: 28457375 DOI: 10.1016/j.transproceed.2017.02.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Acute kidney injury and chronic kidney failure are serious complications after lung transplantation. Glomerular filtration rate (GFR) is the primary indicator of renal function. Several equations have been proposed to evaluate the estimated GFR (eGFR). We compared three different equations to determine which has the better correlation with the development of acute and chronic renal failure in lung recipients. METHODS Twenty-two patients with a mean age of 54.4 ± 8.5 years underwent lung transplantation from 2010 to 2015. Thirteen (59%) had pulmonary fibrosis, 7 (32%) emphysema, 1 (4.5%) bronchiectasis, and 1 (4.5%) lymphangioleiomyomatosis. In all patients, eGFR was measured preoperatively using Cockcroft-Gault (CG), Modification of Diet in Renal Disease (MDRD), and Levey's Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations. In 20 patients (90%) eGFR was calculated at 1, 3, and 6 months. RESULTS According to CKD-EPI and MDRD, eight patients (36.3%) had preoperative reduction in eGFR, whereas 6 patients (27.2%) had preoperative reduction according to the CG (P = .04). The mean values were higher for the CG (103.2 vs. 102 vs. 94.4). Five patients (22.7%) developed perioperative acute renal failure requesting a dialysis treatment; four of these showed a preoperative eGFR to the highest CG (P = .05). At 1 and 6 months after lung transplantation, the CG, MDRD and CKD-EPI eGFR values were, respectively, 86.6, 84.1 and 76.6 mL/min/1.73m2 and 75.8, 72.7, and 72.3 mL/min/1.73m2. CKD-EPI eGFR values are more predictable than the other equations of AKI. CONCLUSIONS Preoperative assessment of eGFR using the MDRD and CKD-EPI seems to correlate better than the CG to the prediction of acute renal failure, whereas for the chronic form the three equations seem equivalent.
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Affiliation(s)
- C Carillo
- Division of Thoracic Surgery, Department of General Surgery and Organ Transplant "PARIDE STEFANINI", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy.
| | - Y Pecoraro
- Division of Thoracic Surgery, Department of General Surgery and Organ Transplant "PARIDE STEFANINI", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - M Anile
- Division of Thoracic Surgery, Department of General Surgery and Organ Transplant "PARIDE STEFANINI", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - S Mantovani
- Division of Thoracic Surgery, Department of General Surgery and Organ Transplant "PARIDE STEFANINI", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - A Oliva
- Department of Public Health and Infectious Disease, Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - A D'Abramo
- Department of Public Health and Infectious Disease, Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - D Amore
- Division of Thoracic Surgery, Department of General Surgery and Organ Transplant "PARIDE STEFANINI", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - A Pagini
- Division of Thoracic Surgery, Department of General Surgery and Organ Transplant "PARIDE STEFANINI", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - T De Giacomo
- Division of Thoracic Surgery, Department of General Surgery and Organ Transplant "PARIDE STEFANINI", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - F Pugliese
- Division of Anesthesia and Transplant Intensive Care Unit, Department of General Surgery and Organ Transplant, Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - E A Rendina
- Division of Thoracic Surgery, Sant'Andrea Hospital, Sapienza Univeristy of Rome, Rome, Italy
| | - F Venuta
- Division of Thoracic Surgery, Department of General Surgery and Organ Transplant "PARIDE STEFANINI", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - D Diso
- Division of Thoracic Surgery, Department of General Surgery and Organ Transplant "PARIDE STEFANINI", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
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Oliva A, Scorzolini L, Castaldi D, Gizzi F, De Angelis M, Storto M, D'Abramo A, Aloj F, Mascellino M, Mastroianni C, Vullo V. Double-carbapenem regimen, alone or in combination with colistin, in the treatment of infections caused by carbapenem-resistant Klebsiella pneumoniae (CR-Kp). J Infect 2017; 74:103-106. [DOI: 10.1016/j.jinf.2016.10.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 10/09/2016] [Indexed: 10/20/2022]
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Oliva A, Gizzi F, Mascellino MT, Cipolla A, D'Abramo A, D'Agostino C, Trinchieri V, Russo G, Tierno F, Iannetta M, Mastroianni CM, Vullo V. Bactericidal and synergistic activity of double-carbapenem regimen for infections caused by carbapenemase-producing Klebsiella pneumoniae. Clin Microbiol Infect 2015; 22:147-153. [PMID: 26409059 DOI: 10.1016/j.cmi.2015.09.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [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: 06/13/2015] [Revised: 09/08/2015] [Accepted: 09/13/2015] [Indexed: 11/27/2022]
Abstract
Available therapeutic options against carbapenem-resistant Klebsiella pneumoniae (CR-Kp) are limited because of the high level of resistance to other antimicrobial classes including polymyxins. The double-carbapenem regimen has been recently considered a possible therapeutic strategy. In the present study, we evaluated the in vitro bactericidal and synergistic activity of a double-carbapenem regimen consisting of ertapenem plus high-dose meropenem in a series of patients with healthcare-associated CR-Kp infections in whom the use of colistin was not indicated because of potential nephrotoxicity and/or resistance. In vitro synergy was evaluated using checkerboard and killing studies. A total of 15 patients were included in the study, with sepsis, severe sepsis and septic shock found in two (13.3%), five (33.3%) and one (6.7%) patients, respectively. Overall, the clinical/microbiological response was 12/15 (80%). Synergy was observed in 11/14 (78.6%) isolates using the checkerboard method whereas in killing studies 12/14 (85.7%) and 14/14 (100%) strains were synergistic and bactericidal at 24 h at concentrations of 1 × MIC MEM+1 × MIC ERT and 2 × MEM+1 × MIC ERT, respectively, with a significant decrease of log CFU/mL compared with other combinations (p <0.0001). The double-carbapenem regimen showed clinical and in vitro effectiveness in patients with CR-Kp infections.
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Affiliation(s)
- A Oliva
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy.
| | - F Gizzi
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - M T Mascellino
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - A Cipolla
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - A D'Abramo
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - C D'Agostino
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - V Trinchieri
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - G Russo
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - F Tierno
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - M Iannetta
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - C M Mastroianni
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - V Vullo
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
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Kestler J, Neeb B, Struyf S, Van Damme J, Cotmore SF, D'Abramo A, Tattersall P, Rommelaere J, Dinsart C, Cornelis JJ. cis requirements for the efficient production of recombinant DNA vectors based on autonomous parvoviruses. Hum Gene Ther 1999; 10:1619-32. [PMID: 10428207 DOI: 10.1089/10430349950017626] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The replication of viral genomes and the production of recombinant viral vectors from infectious molecular clones of parvoviruses MVMp and H1 were greatly improved by the introduction of a consensus NS-1 nick site at the junction between the left-hand viral terminus and the plasmid DNA. Progressive deletions of up to 1600 bp in the region encoding the structural genes as well as insertions of foreign DNA in replacement of those sequences did not appreciably affect the replication ability of the recombinant H1 virus genomes. In contrast, the incorporation of these genomes into recombinant particles appeared to depend on in cis-provided structural gene sequences. Indeed, the production of H1 viral vectors by cotransfection of recombinant clones and helper plasmids providing the structural proteins (VPs) in trans, drastically decreased when more than 800 bp was removed from the VP transcription unit. Furthermore, titers of viral vectors, in which most of the VP-coding region was replaced by an equivalent-length sequence consisting of reporter cDNA and stuffer DNA, were reduced more than 50 times in comparison with recombinant vectors in which stuffer DNA was not substituted for the residual VP sequence. In addition, viral vector production was restricted by the overall size of the genome, with a mere 6% increase in DNA length leading to an approximately 10 times lower encapsidation yield. Under conditions fulfilling the above-mentioned requirements for efficient packaging, titers of virus vectors from improved recombinant molecular DNA clones amounted to 5 x 10(7) infectious units per milliliter of crude extract. These titers should allow the assessment of the therapeutic effect of recombinant parvoviruses expressing small transgenes in laboratory animals.
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Affiliation(s)
- J Kestler
- Applied Tumor Virology Abt. F0100 and INSERM U375 Deutsches Krebsforschungszentrum, Heidelberg, Germany
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