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Arduini F, Cinti S, Caratelli V, Amendola L, Palleschi G, Moscone D. Origami multiple paper-based electrochemical biosensors for pesticide detection. Biosens Bioelectron 2019; 126:346-354. [DOI: 10.1016/j.bios.2018.10.014] [Citation(s) in RCA: 159] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/23/2018] [Accepted: 10/09/2018] [Indexed: 12/14/2022]
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Fabiani L, Pucci E, Delibato E, Volpe G, Piermarini S, De Medici D, Capuano F, Palleschi G. ELIME assay vs Real-Time PCR and conventional culture method for an effective detection of Salmonella in fresh leafy green vegetables. Talanta 2017; 166:321-327. [PMID: 28213241 DOI: 10.1016/j.talanta.2017.01.071] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/23/2017] [Accepted: 01/25/2017] [Indexed: 11/27/2022]
Abstract
The detection of Salmonella according to EC regulation is still primarily based on traditional microbiological culture methods that may take several days to be completed. The purpose of this work is to demonstrate the applicability of an Enzyme-Linked-Immuno-Magnetic-Electrochemical (ELIME) assay, recently developed by our research group for the detection of salmonella in irrigation water, in fresh (raw and ready-to-eat) leafy green vegetables by comparison with Real-Time PCR (RTi-PCR) and ISO culture methods. Since vegetables represent a more complex matrix than irrigation water, preliminary experiments were carried out on two leafy green vegetables that resulted negative for salmonella by the ISO method. 25g of these samples were experimentally inoculated with 1-10 CFU of S. Napoli or S. Thompson and pre-enriched for 20h in two different broths. At this time aliquots were taken, concentrated at different levels by centrifugation, and analyzed by ELIME and RTi-PCR. Once selected the best culture medium for salmonella growth, and the optimal concentration factor suitable to reduce the sample matrix effect, enhancing the out-put signal, several raw and ready-to-eat leafy green vegetables were artificially inoculated and pre-enriched. Aliquots were then taken at different incubation times and analyzed with both techniques. Results obtained showed that 20 and 8h of pre-enrichment were required to allow the target salmonella (1-10 CFU/25g) to multiply until reaching a detectable concentration by ELIME and RTi-PCR assays, respectively. A confirmation with the ISO culture method was carried out. Based on the available literature, this is the first report of the application of an ELISA based method for the detection of Salmonella in vegetables.
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Affiliation(s)
- L Fabiani
- Department of Chemical Science and Technologies, "Tor Vergata" University, via della Ricerca Scientifica, Rome, Italy
| | - E Pucci
- Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, viale Regina Elena 299, Rome, Italy
| | - E Delibato
- Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, viale Regina Elena 299, Rome, Italy.
| | - G Volpe
- Department of Chemical Science and Technologies, "Tor Vergata" University, via della Ricerca Scientifica, Rome, Italy.
| | - S Piermarini
- Department of Chemical Science and Technologies, "Tor Vergata" University, via della Ricerca Scientifica, Rome, Italy
| | - D De Medici
- Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, viale Regina Elena 299, Rome, Italy
| | - F Capuano
- Department of Food Inspection, Istituto Zooprofilattico Sperimentale del Mezzogiorno, via della Salute 2, Portici, NA, Italy
| | - G Palleschi
- Department of Chemical Science and Technologies, "Tor Vergata" University, via della Ricerca Scientifica, Rome, Italy
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Simone G, De Nunzio C, Ferriero M, Cindolo L, Brookman-May S, Papalia R, Sperduti I, Collura D, Leonardo C, Anceschi U, Tuderti G, Misuraca L, Dalpiaz O, Hatzl S, Lodde M, Trenti E, Pastore A, Palleschi G, Lotrecchiano G, Salzano L, Carbone A, De Cobelli O, Tubaro A, Schips L, Zigeuner R, Tostain J, May M, Guaglianone S, Muto G, Gallucci M. Trends in the use of partial nephrectomy for cT1 renal tumors: Analysis of a 10-yr European multicenter dataset. Eur J Surg Oncol 2016; 42:1729-1735. [DOI: 10.1016/j.ejso.2016.03.022] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 03/07/2016] [Accepted: 03/21/2016] [Indexed: 11/16/2022] Open
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Zerbinati C, Caponecchia L, Rago R, Leoncini E, Bottaccioli AG, Ciacciarelli M, Pacelli A, Salacone P, Sebastianelli A, Pastore A, Palleschi G, Boccia S, Carbone A, Iuliano L. Fatty acids profiling reveals potential candidate markers of semen quality. Andrology 2016; 4:1094-1101. [DOI: 10.1111/andr.12236] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 05/12/2016] [Accepted: 05/17/2016] [Indexed: 01/29/2023]
Affiliation(s)
- C. Zerbinati
- Vascular Biology & Mass Spectrometry Laboratory; Department of Medico-Surgical Sciences and Biotechnologies; Sapienza University of Rome; Latina Italy
| | - L. Caponecchia
- Center for Couple Infertility and Andrology; S. M. Goretti Hospital; Latina Italy
| | - R. Rago
- Pathophysiology of Reproduction and Andrology Unit; S. Pertini Hospital; Rome Italy
| | - E. Leoncini
- Section of Hygiene; Institute of Public Health; Università Cattolica del Sacro Cuore; Rome Italy
| | - A. G. Bottaccioli
- Vascular Biology & Mass Spectrometry Laboratory; Department of Medico-Surgical Sciences and Biotechnologies; Sapienza University of Rome; Latina Italy
| | - M. Ciacciarelli
- Vascular Biology & Mass Spectrometry Laboratory; Department of Medico-Surgical Sciences and Biotechnologies; Sapienza University of Rome; Latina Italy
| | - A. Pacelli
- Vascular Biology & Mass Spectrometry Laboratory; Department of Medico-Surgical Sciences and Biotechnologies; Sapienza University of Rome; Latina Italy
| | - P. Salacone
- Center for Couple Infertility and Andrology; S. M. Goretti Hospital; Latina Italy
| | - A. Sebastianelli
- Center for Couple Infertility and Andrology; S. M. Goretti Hospital; Latina Italy
| | - A. Pastore
- Urology Unit; Department of Medico-Surgical Sciences and Biotechnologies; Istituto Chirurgico Ortopedico alaumatologico; Latina Italy
| | - G. Palleschi
- Urology Unit; Department of Medico-Surgical Sciences and Biotechnologies; Istituto Chirurgico Ortopedico alaumatologico; Latina Italy
| | - S. Boccia
- Section of Hygiene; Institute of Public Health; Università Cattolica del Sacro Cuore; Rome Italy
| | - A. Carbone
- Urology Unit; Department of Medico-Surgical Sciences and Biotechnologies; Istituto Chirurgico Ortopedico alaumatologico; Latina Italy
| | - L. Iuliano
- Vascular Biology & Mass Spectrometry Laboratory; Department of Medico-Surgical Sciences and Biotechnologies; Sapienza University of Rome; Latina Italy
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Lvova L, Guanais Gonçalves C, Petropoulos K, Micheli L, Volpe G, Kirsanov D, Legin A, Viaggiu E, Congestri R, Guzzella L, Pozzoni F, Palleschi G, Di Natale C, Paolesse R. Electronic tongue for microcystin screening in waters. Biosens Bioelectron 2016; 80:154-160. [DOI: 10.1016/j.bios.2016.01.050] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 01/11/2016] [Accepted: 01/18/2016] [Indexed: 12/30/2022]
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Antonacci A, Arduini F, Moscone D, Palleschi G, Scognamiglio V. Commercially Available (Bio)sensors in the Agrifood Sector. Biosensors for Sustainable Food - New Opportunities and Technical Challenges 2016. [DOI: 10.1016/bs.coac.2016.04.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Volpe G, Delibato E, Fabiani L, Pucci E, Piermarini S, D'Angelo A, Capuano F, De Medici D, Palleschi G. Development and evaluation of an ELIME assay to reveal the presence of Salmonella in irrigation water: Comparison with Real-Time PCR and the Standard Culture Method. Talanta 2015; 149:202-210. [PMID: 26717832 DOI: 10.1016/j.talanta.2015.11.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 10/29/2015] [Accepted: 11/04/2015] [Indexed: 11/15/2022]
Abstract
A reliable, low-cost and easy-to-use ELIME (Enzyme-Linked-Immuno-Magnetic-Electrochemical) assay for detection of Salmonella enterica in irrigation water is presented. Magnetic beads (MBs), coupled to a strip of eight-magnetized screen-printed electrodes localized at the bottom of eight wells (8-well/SPE strip), effectively supported a sandwich immunological chain. Enzymatic by-product is quickly measured by chronoamperometry, using a portable instrument. With the goal of developing a method able to detect a wide range of Salmonella serotypes, including S. Napoli and S. Thompson strains responsible for various community alerts, different kinds of MBs, antibodies and blocking agents were tested. The final system employs MBs coated with a broad reactivity monoclonal antibody anti-salmonella and blocked with dry milk. For a simple and rapid assay these two steps were performed in a preliminary phase, while the two sequential incubations for the immuno-recognition events were merged in a single step of 1h. In parallel a Real-Time PCR (RTi-PCR) method, based on a specific locked nucleic acid (LNA) fluorescent probe and an internal amplification control (IAC), was carried out. The selectivity of the ELIME and RTi-PCR assays was proved by inclusivity and exclusivity tests performed analyzing different Salmonella serotypes and non-target microorganisms, most commonly isolated from environmental sources. Furthermore, both methods were applied to experimentally and not experimentally contaminated irrigation water samples. Results confirmed by the ISO culture method, demonstrated the effectiveness of ELIME and RTi-PCR assays to detect a low number of salmonella cells (1-10 CFU/L) reducing drastically the long analysis time usually required to reveal this pathogen.
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Affiliation(s)
- G Volpe
- Department of Chemical Science and Technologies, "Tor Vergata" University, Via della Ricerca Scientifica, Rome, Italy.
| | - E Delibato
- Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, Viale Regina Elena 299, Rome, Italy.
| | - L Fabiani
- Department of Chemical Science and Technologies, "Tor Vergata" University, Via della Ricerca Scientifica, Rome, Italy
| | - E Pucci
- Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, Viale Regina Elena 299, Rome, Italy
| | - S Piermarini
- Department of Chemical Science and Technologies, "Tor Vergata" University, Via della Ricerca Scientifica, Rome, Italy
| | - A D'Angelo
- Department of Environment and Primary Prevention, Istituto Superiore di Sanità, Viale Regina Elena 299, Rome, Italy
| | - F Capuano
- Department of Food Inspection, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Via della Salute 2, Portici, NA, Italy
| | - D De Medici
- Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, Viale Regina Elena 299, Rome, Italy
| | - G Palleschi
- Department of Chemical Science and Technologies, "Tor Vergata" University, Via della Ricerca Scientifica, Rome, Italy
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Adornetto G, Porchetta A, Palleschi G, Plaxco KW, Ricci F. A general approach to the design of allosteric, transcription factor-regulated DNAzymes. Chem Sci 2015; 6:3692-3696. [PMID: 28706715 PMCID: PMC5496187 DOI: 10.1039/c5sc00228a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 03/09/2015] [Indexed: 12/26/2022] Open
Abstract
Here we explore a general strategy for the rational design of nucleic acid catalysts that can be allosterically activated by specific nucleic-acid binding proteins. To demonstrate this we have combined a catalytic DNAzyme sequence and the consensus sequence recognized by specific transcription factors to create a construct exhibiting two low-energy conformations: a more stable conformation lacking catalytic activity and lacking the transcription factor binding site, and a less stable conformation that is both catalytically active and competent to bind the transcription factor. The presence of the target transcription factor pushes the equilibrium between these states towards the latter conformation, concomitantly activating catalysis. To demonstrate this we have designed and characterized two peroxidase-like DNAzymes whose activities are triggered upon binding either TATA binding protein or the microphthalmia-associated transcription factor. Our approach augments the current tool kit for the allosteric control of DNAzymes and ribozymes and, because transcription factors control many key biological functions, could have important clinical and diagnostic applications.
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Affiliation(s)
- G Adornetto
- Dipartimento di Scienze e Tecnologie Chimiche University of Rome Tor Vergata , Via della Ricerca Scientifica , Rome 00133 , Italy .
| | - A Porchetta
- Dipartimento di Scienze e Tecnologie Chimiche University of Rome Tor Vergata , Via della Ricerca Scientifica , Rome 00133 , Italy .
- Consorzio Interuniversitario Biostrutture e Biosistemi "INBB" , Rome 00136 , Italy
| | - G Palleschi
- Dipartimento di Scienze e Tecnologie Chimiche University of Rome Tor Vergata , Via della Ricerca Scientifica , Rome 00133 , Italy .
- Consorzio Interuniversitario Biostrutture e Biosistemi "INBB" , Rome 00136 , Italy
| | - K W Plaxco
- Department of Chemistry and Biochemistry , University of California Santa Barbara , Santa Barbara , California 93106 , USA
- Center for Bioengineering , University of California Santa Barbara , Santa Barbara , California 93106 , USA
| | - F Ricci
- Dipartimento di Scienze e Tecnologie Chimiche University of Rome Tor Vergata , Via della Ricerca Scientifica , Rome 00133 , Italy .
- Consorzio Interuniversitario Biostrutture e Biosistemi "INBB" , Rome 00136 , Italy
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Amine A, Arduini F, Moscone D, Palleschi G. Recent advances in biosensors based on enzyme inhibition. Biosens Bioelectron 2015; 76:180-94. [PMID: 26227311 DOI: 10.1016/j.bios.2015.07.010] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [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: 05/01/2015] [Revised: 06/28/2015] [Accepted: 07/05/2015] [Indexed: 02/07/2023]
Abstract
Enzyme inhibitors like drugs and pollutants are closely correlated to human and environmental health, thus their monitoring is of paramount importance in analytical chemistry. Enzymatic biosensors represent cost-effective, miniaturized and easy to use devices; particularly biosensors based on enzyme inhibition are useful analytical tools for fast screening and monitoring of inhibitors. The present review will highlight the research carried out in the last 9 years (2006-2014) on biosensors based on enzyme inhibition. We underpin the recent advances focused on the investigation in new theoretical approachs and in the evaluation of biosensor performances for reversible and irreversible inhibitors. The use of nanomaterials and microfluidic systems as well as the applications of the various biosensors in real samples is critically reviewed, demonstrating that such biosensors allow the development of useful devices for a fast and reliable alarm system.
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Affiliation(s)
- A Amine
- Faculty of Sciences and Techniques, University Hassan II of Casablanca, Morocco.
| | - F Arduini
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy; Consorzio Interuniversitario Biostrutture e Biosistemi "INBB", Viale Medaglie d'Oro 305, 00136 Rome, Italy
| | - D Moscone
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy; Consorzio Interuniversitario Biostrutture e Biosistemi "INBB", Viale Medaglie d'Oro 305, 00136 Rome, Italy
| | - G Palleschi
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy; Consorzio Interuniversitario Biostrutture e Biosistemi "INBB", Viale Medaglie d'Oro 305, 00136 Rome, Italy
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Palleschi G, Carbone A, Ripoli A, Silvestri L, Petrozza V, Zanello PP, Pastore AL. A prospective study to evaluate the efficacy of Cistiquer in improving lower urinary tract symptoms in females with urethral syndrome. MINERVA UROL NEFROL 2014; 66:225-232. [PMID: 25034330] [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: 06/03/2023]
Abstract
AIM The aim of the study was to compare Cistiquer, a new phytotherapeutic product developed for chronic bladder inflammatory diseases, and intra-vesical administration of gentamicin plus betametasone, in females with urethral syndrome. METHODS Between september 2013 and may 2014, 60 women with urethral syndrome and trigonitis were incuded in this study. Patients were randomly assigned to treatment with intra-vesical administration of betametasone 8 mg plus gentamicin 80 mg (group A), and oral administration of Cistiquer (group B) for 7 weeks. Before and after the therapeutic protocol, symptoms were assessed by three days voiding diary, the overactive bladder questionnaire short form and a ten points visual analogic scale adopted to assess the micturition discomfort. Histologic findings were assessed by the examination of specimens obtained by cold bladder biopsies of the bladder trigone at baseline in all the subjects. RESULTS The two groups had significant and comparable symptoms improvement. However, the score obtained from the visual analogic scale decreased significantly only in the group submitted to oral therapy. Furthermore, in the group treated with endovesical approach, higher drop out rate and higher incidence of urinary infection were observed. CONCLUSION Patients with urethral syndrome and trigonitis improved symptoms either with oral therapy with Cistiquer and with intra-vesical administration of gentamicin plus betametasone. However, treatment adherence resulted higher for patients treated by oral therapy and rate of adverse events resulted higher for those submitted to endovesical treatment.
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Affiliation(s)
- G Palleschi
- Unit of Urology, Uroresearch Association Department of Sciences and Medico‑Surgical Biotechnologies Sapienza University of Rome I.C.O.T. Hospital, Latina, Italy -
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Pastore AL, Palleschi G, Ripoli A, Silvestri L, Maggioni C, Pagliuca G, Nobili Benedetti FM, Gallo A, Zucchi A, Maurizi A, Costantini E, Carbone A. Severe obstructive sleep apnoea syndrome and erectile dysfunction: a prospective randomised study to compare sildenafil vs. nasal continuous positive airway pressure. Int J Clin Pract 2014; 68:995-1000. [PMID: 24852701 DOI: 10.1111/ijcp.12463] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND A high incidence of erectile dysfunction (ED) among patients with obstructive sleep apnoea syndrome (OSAS) has been reported, with a strong correlation between obstructive sleep apnoea, ED, and quality of life (QOL), and it has been estimated that 10-60% of patients with OSAS suffer from ED. In this prospective randomised controlled trial, we investigated 82 men with ED consecutively who were referred to the outpatient clinic for sleep disorders and had severe OSAS (AHI> 30 events/h) without any other comorbidities as a possible cause of ED. The aim of this study was to evaluate and compare the efficacy of sildenafil vs. continuous positive airway pressure (CPAP) in men with ED and severe OSAS. METHODS Eighty-two patients were randomised to two main treatment groups: group 1 patients (n = 41) were treated with 100-mg sildenafil 1 h before sexual intercourse without CPAP, and group 2 patients (n = 41 men) were treated with only nasal CPAP during night time sleep. Both groups were evaluated with the same questionnaires (International Index of Erectile Function-EF domain; Sex Encounter Profile; Erectile Dysfunction Inventory Treatment Satisfaction) 12 weeks after treatment. RESULTS In patients receiving sildenafil treatment, 58.2% of those who attempted sexual intercourses were successful compared to 30.4% in the CPAP group. The mean number of successful attempts per week was significantly higher in the sildenafil group compared with the CPAP group (2.9 vs. 1.7, respectively; p < 0.0001). The mean IIEF-EF domain scores were significantly higher in the sildenafil group compared with the CPAP group (p < 0.0001). The overall satisfaction rate was 68% with sildenafil treatment and 29% with CPAP treatment. CONCLUSIONS This study confirms that severe OSAS is strongly associated with erectile dysfunction. CPAP and sildenafil (100 mg) are safe and effective therapies for OSAS-related ED patients. In the present study sildenafil was more effective than CPAP in treating ED associated with OSAS, as indicated by a significantly higher rate of successful attempts at intercourse and higher IIEF-EF domain scores. Our study, to date, is the only that has investigated sildenafil in patients with severe OSAS.
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Affiliation(s)
- A L Pastore
- Department of Medico-Surgical Sciences and Biotechnologies, Urology Unit ICOT, Faculty of Pharmacy and Medicine, Sapienza University of Rome, Latina, Italy; Uroresearch Association (non-profit research), Latina, Italy
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Mauro D, Ciardullo S, Civitareale C, Fiori M, Pastorelli A, Stacchini P, Palleschi G. Development and validation of a multi-residue method for determination of 18 β-agonists in bovine urine by UPLC–MS/MS. Microchem J 2014. [DOI: 10.1016/j.microc.2014.02.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Finazzi AE, Costantini E, Pietropaolo A, Palleschi G, Carbone A, Topazio L, Soligo M, Del Popolo G, Li Marzi V, Salvatore S, Serati M. 386 Urodynamics useless before surgery for female stress urinary incontinence: Are you sure? Results from a multicenter single nation database. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/s1569-9056(14)60381-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Palleschi G, Conte A, Pastore A, Salerno G, Morgia G, Giannantoni A, Berardelli A, Carbone A. Does the neobladder filling modulate soleus H reflex? Clin Neurophysiol 2014; 125:425-7. [DOI: 10.1016/j.clinph.2013.06.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/21/2013] [Accepted: 06/23/2013] [Indexed: 11/15/2022]
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Boboc G, Donato V, Osimani M, Laghi A, Pastore A, Palleschi G, Carbone A. EP-1293: Computed tomography perfusion of prostate cancer before and after radiation therapy: Early experience results. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31411-0] [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: 10/23/2022]
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Spinella K, Mosiello L, Palleschi G, Vitali F. Development of a QCM (Quartz Crystal Microbalance) Biosensor to Detection of Mycotoxins. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/978-3-319-00684-0_37] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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Valentini F, Carbone M, Palleschi G. Graphene oxide nanoribbons (GNO), reduced graphene nanoribbons (GNR), and multi-layers of oxidized graphene functionalized with ionic liquids (GO–IL) for assembly of miniaturized electrochemical devices. Anal Bioanal Chem 2012; 405:3449-74. [DOI: 10.1007/s00216-012-6615-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 11/27/2012] [Accepted: 11/28/2012] [Indexed: 11/24/2022]
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Valentini F, Galache Fernàndez L, Tamburri E, Palleschi G. Single Walled Carbon Nanotubes/polypyrrole-GOx composite films to modify gold microelectrodes for glucose biosensors: Study of the extended linearity. Biosens Bioelectron 2012; 43:75-8. [PMID: 23277343 DOI: 10.1016/j.bios.2012.11.019] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 11/09/2012] [Accepted: 11/15/2012] [Indexed: 11/16/2022]
Abstract
A glucose biosensor was assembled using gold microelectrodes (diameter of 250 μm) coated by Single-Walled Carbon Nanotubes (SWCNTs), via the Electrophoresis Deposition Process (EPD). This nanostructured platform was successfully used to deposit the poly(pyrrole)/glucose oxidase film (PPy/GOx). The most important result of this biosensors was the wide linear range of concentration, ranging from 4 to100 mM (covering the hypo- and hyper-glycemia range, useful in diabetes). This extended linearity offered the possibility to measure glucose from 0.560 to 12.0 mM, with a detection limit of 50 μM (useful for hypo-glycemia disease).
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Affiliation(s)
- F Valentini
- Università Tor Vergata, Dipartimento di Chimica, via della Ricerca Scientifica 1, 00133 Roma, Italy.
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Valentini F, Roscioli D, Carbone M, Conte V, Floris B, Palleschi G, Flammini R, Bauer EM, Nasillo G, Caponetti E. Oxidized Graphene in Ionic Liquids for Assembling Chemically Modified Electrodes: A Structural and Electrochemical Characterization Study. Anal Chem 2012; 84:5823-31. [DOI: 10.1021/ac301285e] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- F. Valentini
- Department Chemical Science
and Technologies, University Tor Vergata, Via della Ricerca Scientifica,1 00133 Roma
| | - D. Roscioli
- Department Chemical Science
and Technologies, University Tor Vergata, Via della Ricerca Scientifica,1 00133 Roma
| | - M. Carbone
- Department Chemical Science
and Technologies, University Tor Vergata, Via della Ricerca Scientifica,1 00133 Roma
| | - V. Conte
- Department Chemical Science
and Technologies, University Tor Vergata, Via della Ricerca Scientifica,1 00133 Roma
| | - B. Floris
- Department Chemical Science
and Technologies, University Tor Vergata, Via della Ricerca Scientifica,1 00133 Roma
| | - G. Palleschi
- Department Chemical Science
and Technologies, University Tor Vergata, Via della Ricerca Scientifica,1 00133 Roma
| | - R. Flammini
- CNR-IMIP, Istituto di Metodologie
Inorganiche e Plasmi, Area della Ricerca di Roma I, via Salaria km
29.300, Monterotondo Scalo (RM), Italy and INFN-LNF, Laboratori Nazionali
di Frascati, Via E. Fermi, 40, 00044 Frascati (RM) Italy
| | - E. M. Bauer
- Institute of Structure of Matter, Italian National Research Council, Via Salaria km 29.3,
00015 Monterotondo (RM), Italy
| | - G. Nasillo
- Centro Grandi Apparecchiature,
University of Palermo, Via F. Marini 14, 90128 Palermo, Italy and
Department of Physical Chemistry, University of Palermo,Viale delle Scienze 90128 Palermo, Italy
| | - E. Caponetti
- Centro Grandi Apparecchiature,
University of Palermo, Via F. Marini 14, 90128 Palermo, Italy and
Department of Physical Chemistry, University of Palermo,Viale delle Scienze 90128 Palermo, Italy
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Pastore AL, Palleschi G, Leto A, Pacini L, Iori F, Leonardo C, Carbone A. A prospective randomized study to compare pelvic floor rehabilitation and dapoxetine for treatment of lifelong premature ejaculation. ACTA ACUST UNITED AC 2012; 35:528-33. [DOI: 10.1111/j.1365-2605.2011.01243.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Valentini F, Romanazzo D, Carbone M, Palleschi G. Modified Screen-Printed Electrodes Based on Oxidized Graphene Nanoribbons for the Selective Electrochemical Detection of Several Molecules. ELECTROANAL 2012. [DOI: 10.1002/elan.201100415] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Pastore A, Palleschi G, Silvestri L, Ripoli A, Autieri D, Osimani M, Laghi A, Petrozza V, Carbone A. MP-03.20 Prostate Cancer Angiogenesis: A Preliminary Experience with 64-Row Multidetector CT Perfusion. Do Quantitative Measurements Distinguish Tumor? Urology 2011. [DOI: 10.1016/j.urology.2011.07.069] [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: 10/15/2022]
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Pastore A, Fabbiano C, Palleschi G, Silvestri L, Ripoli A, Autieri D, Petrozza V, Calogero A, Carbone A. UP-01.023 Stabilization of Urothelial Primary Culture and Chemosensitivity Assay in Transitional Cell Carcinoma (TCC). Urology 2011. [DOI: 10.1016/j.urology.2011.07.575] [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: 11/30/2022]
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25
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Ivanov A, Younusov R, Evtugyn G, Arduini F, Moscone D, Palleschi G. Acetylcholinesterase biosensor based on single-walled carbon nanotubes—Co phtalocyanine for organophosphorus pesticides detection. Talanta 2011; 85:216-21. [DOI: 10.1016/j.talanta.2011.03.045] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 03/09/2011] [Accepted: 03/20/2011] [Indexed: 11/27/2022]
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Piermarini S, Volpe G, Esti M, Simonetti M, Palleschi G. Real time monitoring of alcoholic fermentation with low-cost amperometric biosensors. Food Chem 2011; 127:749-54. [DOI: 10.1016/j.foodchem.2011.01.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2010] [Revised: 10/13/2010] [Accepted: 01/01/2011] [Indexed: 10/18/2022]
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Heyn R, Relucenti M, Petruzziello L, Franchitto G, Pastore A, Palleschi G, Carbone A, Rago R, Petrozza V, Familiari G. Non-mosaic, non-azoospermic Klinefelter's syndrome in a young man with bilateral varicocele. J Endocrinol Invest 2011; 34:485-6. [PMID: 21747219 DOI: 10.1007/bf03346717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Radoi A, Moscone D, Palleschi G. Sensing the Lactic Acid in Probiotic Yogurts Using an L-Lactate Biosensor Coupled with a Microdialysis Fiber Inserted in a Flow Analysis System. ANAL LETT 2010. [DOI: 10.1080/00032710903518716] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Piermarini S, Volpe G, Federico R, Moscone D, Palleschi G. Detection of Biogenic Amines in Human Saliva Using a Screen-Printed Biosensor. ANAL LETT 2010. [DOI: 10.1080/00032710903518724] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Carbone M, Valentini F, Caminiti R, Petrinca AR, Donia D, Divizia M, Palleschi G. Are PEI-coated SWCNTs conjugated with hepatitis A virus? A chemical study with SEM,
Z
-potential, EDXD and RT-PCR. Biomed Mater 2010; 5:35001. [DOI: 10.1088/1748-6041/5/3/035001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Neagu D, Perrino S, Micheli L, Palleschi G, Moscone D. Aflatoxin M1 determination and stability study in milk samples using a screen-printed 96-well electrochemical microplate. Int Dairy J 2009. [DOI: 10.1016/j.idairyj.2009.06.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Legramante JM, Valentini F, Magrini A, Palleschi G, Sacco S, Iavicoli I, Pallante M, Moscone D, Galante A, Bergamaschi E, Bergamaschi A, Pietroiusti A. Cardiac autonomic regulation after lung exposure to carbon nanotubes. Hum Exp Toxicol 2009; 28:369-75. [PMID: 19755448 DOI: 10.1177/0960327109105150] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The ultrafine (UF) component of airborne pollution may impair cardiovascular autonomic control, a high-risk condition for cardiovascular adverse events. Since engineered nanoparticles, such as single-walled carbon nanotubes (SWCNTs) share physicochemical properties with UF, they might have similar adverse effects. Aim of the study was to evaluate arterial baroreflex function (BRF) at baseline, 24 h after the first instillation, immediately before the second one, and 2 weeks later, in adult Wystar-Kyoto conscious rats undergoing two intratracheal instillations of SWCNT (eight rats) or phosphate buffer saline (PBS) (five rats) at 2-week interval. During each session, 30-min continuous recording of arterial pressure and pulse interval was performed by a telemetered catheter implanted in the abdominal aorta of the rats. BRF was studied by the sequence technique. SWCNTs dispersed in PBS (1 mg/ml) were administered immediately after sonication (1 microg/g body weight). A significant decrease in the number of baroreflex sequences (from 498 +/- 27.1 at baseline to 287 +/- 40.2 at the recording performed after 4 weeks; P < 0.05) was observed in SWCNT-instilled rats, whereas no significant change was detected in controls. These data suggest that SWCNTs may alter the BRF, thus affecting the autonomic cardiovascular control regulation.
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Affiliation(s)
- J M Legramante
- Department of Internal Medicine, Tor Vergata University Rome, Italy
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Neagu D, Capodilupo A, Vilkanauskyte A, Micheli L, Palleschi G, Moscone D. AFB1–AP Conjugate for Enzyme Immunoassay of Aflatoxin B1in Corn Samples. ANAL LETT 2009. [DOI: 10.1080/00032710902890405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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Ricci F, Pino F, Abagnale M, Messia M, Marconi E, Volpe G, Moscone D, Palleschi G. Direct electrochemical detection of trichothecenes in wheat samples using a 96-well electrochemical plate coupled with microwave hydrolysis. WORLD MYCOTOXIN J 2009. [DOI: 10.3920/wmj2008.1133] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The use of a 96-well electrochemical plate for the fast and sensitive detection of deoxynivalenol and nivalenol in wheat samples is shown. Deoxynivalenol and nivalenol are hydrolysed using a microwave hydrolysis procedure (2 min) which leads to the production of electroactive compounds that can be sensitively detected by the use of cheap screen-printed electrodes. A procedure of extraction with aqueous acetonitrile and a clean-up step was demonstrated to be suitable for the application with wheat samples providing suitable detection limit (LOD=1.1 µg/g) and working range (2-20 µg/g) for the determination of deoxynivalenol in cereals for feed consumption.
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Affiliation(s)
- F. Ricci
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - F. Pino
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - M. Abagnale
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - M. Messia
- DISTAAM, Università degli Studi del Molise, Via De Sanctis snc, 86100 Campobasso, Italy
| | - E. Marconi
- DISTAAM, Università degli Studi del Molise, Via De Sanctis snc, 86100 Campobasso, Italy
| | - G. Volpe
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - D. Moscone
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - G. Palleschi
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
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Volpe G, Cotroneo E, Moscone D, Croci L, Cozzi L, Ciccaglioni G, Palleschi G. A bienzyme electrochemical probe for flow injection analysis of okadaic acid based on protein phosphatase-2A inhibition: An optimization study. Anal Biochem 2009; 385:50-6. [DOI: 10.1016/j.ab.2008.10.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2008] [Revised: 09/25/2008] [Accepted: 10/13/2008] [Indexed: 11/26/2022]
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Radoi A, Compagnone D, Valcarcel M, Placidi P, Materazzi S, Moscone D, Palleschi G. Detection of NADH via electrocatalytic oxidation at single-walled carbon nanotubes modified with Variamine blue. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.09.031] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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38
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Piermarini S, Volpe G, Ricci F, Micheli L, Moscone D, Palleschi G, Führer M, Krska R, Baumgartner S. Rapid Screening Electrochemical Methods for Aflatoxin B1and Type‐A Trichothecenes: A Preliminary Study. ANAL LETT 2007. [DOI: 10.1080/00032710701326692] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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39
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Oliveira SCB, Diculescu VC, Palleschi G, Compagnone D, Oliveira-Brett AM. Electrochemical oxidation of ochratoxin A at a glassy carbon electrode and in situ evaluation of the interaction with deoxyribonucleic acid using an electrochemical deoxyribonucleic acid-biosensor. Anal Chim Acta 2007; 588:283-91. [PMID: 17386822 DOI: 10.1016/j.aca.2007.02.029] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2006] [Revised: 02/06/2007] [Accepted: 02/13/2007] [Indexed: 10/23/2022]
Abstract
Ochratoxin A (OTA) is a fungal metabolite that occurs in foods, beverages, animal tissues, human blood and presents carcinogenic, teratogenic and nephrotoxic properties. This study concerns the redox properties of OTA using electrochemical techniques which have the potential for providing insights into the biological redox reactions of this molecule. The in situ evaluation of the OTA interaction with DNA using a DNA-electrochemical biosensor is also reported. The oxidation of OTA is an irreversible process proceeds with the transfer of one electron and one proton in a diffusion-controlled mechanism. The diffusion coefficient of OTA was calculated in pH 7 phosphate buffer to be D(O) = 3.65x10(-6) cm2 s(-1). The oxidation of OTA is also pH dependent for electrolytes with pH<7 and involves the formation of a main oxidation product which adsorbs strongly at the GCE surface undergoing reversible oxidation. In alkaline electrolytes OTA undergoes chemical deprotonation, the oxidation involving only the transfer of one electron. The electrochemical dsDNA-biosensor was also used to evaluate the possible interaction between OTA and DNA. The experiments have clearly proven that OTA interacts and binds to dsDNA strands immobilized onto a GCE surface, but no evidence of DNA-damage caused by OTA was obtained.
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Affiliation(s)
- S C B Oliveira
- Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, 3004-535 Coimbra, Portugal
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Valentini F, Palleschi G, Morales E, Orlanducci S, Tamburri E, Terranova M. Functionalized Single-Walled Carbon Nanotubes Modified Microsensors for the Selective Response of Epinephrine in Presence of Ascorbic Acid. ELECTROANAL 2007. [DOI: 10.1002/elan.200603788] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Piermarini S, Micheli L, Ammida NHS, Palleschi G, Moscone D. Electrochemical immunosensor array using a 96-well screen-printed microplate for aflatoxin B1 detection. Biosens Bioelectron 2007; 22:1434-40. [PMID: 16893640 DOI: 10.1016/j.bios.2006.06.029] [Citation(s) in RCA: 149] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2006] [Revised: 06/06/2006] [Accepted: 06/15/2006] [Indexed: 11/21/2022]
Abstract
A novel analytical immunosensor array, based on a microtiter plate coupled to a multichannel electrochemical detection (MED) system using the intermittent pulse amperometry (IPA) technique, is proposed for the detection of aflatoxin B1 (AFB1). In the present work, the electrochemical behaviour and electroanalytical performance of the thick-film carbon sensors (also designated as screen-printed electrodes) incorporated in the multichannel electrochemical plate were first evaluated. Then the 96-well screen-printed microplate was modified in accord with a competitive indirect enzyme-linked immunoassay (ELISA) format for aflatoxin B1 detection. The measurements were performed using both spectrophotometric and electrochemical procedures and the results of the calibration curves, detection limit (LOD), sensitivity and reproducibility of the respective assay systems were evaluated. The immunoassay was then applied for analysis of corn samples spiked with AFB1 before and after the extraction treatment, in order to study the extraction efficiency and the matrix effect, respectively. These studies have shown that using this system, AFB1 can be measured at a level of 30 pg/mL and with a working range between 0.05 and 2 ng/mL. Good recoveries (103+/-8%) were obtained, demonstrating the suitability of the proposed assay for accurate determination of the AFB1 concentration in corn samples. The specificity of the assay was assessed by studying the cross-reactivity of PAb relative to AFB1. The results indicated that the PAb could readily distinguish AFB1 from other aflatoxins, with the exception for AFG1.
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Affiliation(s)
- S Piermarini
- Dipartimento di Scienze e Tecnologie Chimiche, Università Tor Vergata, via della Ricerca Scientifica, 00133 Rome, Italy
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Radoi A, Compagnone D, Batic M, Klincar J, Gorton L, Palleschi G. NADH screen-printed electrodes modified with zirconium phosphate, Meldola blue, and Reinecke salt. Application to the detection of glycerol by FIA. Anal Bioanal Chem 2007; 387:1049-58. [PMID: 17203252 DOI: 10.1007/s00216-006-0975-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2006] [Revised: 10/27/2006] [Accepted: 10/30/2006] [Indexed: 11/24/2022]
Abstract
Bulk screen-printed electrodes (bSPEs) modified with zirconium phosphate (ZrP) and Meldola blue (MB) and by electrochemical deposition of a Reineckate film (bMBZrPRs-SPEs) have been constructed and used as NADH sensors. Cyclic voltammetric investigation of these bulk electrochemically modified screen-printed electrodes revealed stable catalytic activity in oxidation of the reduced form of the coenzyme nicotinamide adenine dinucleotide (NADH). Flow-injection analysis (FIA) coupled with amperometric detection confirmed the improved stability of the bMBZrPRs-SPEs (10(-4) mol L(-1) NADH, %RSD = 4.2, n = 90, pH 7.0). Other conditions, for example applied working potential (+50 mV relative to Ag|AgCl), flow rate (0.30 mL min(-1)) and pH-dependence (range 4.0-10.0) were evaluated and optimized. A glycerol biosensor, prepared by immobilizing glycerol dehydrogenase (GDH) on the working electrode area of a bMBZrPRs-SPE, was also assembled. The biosensor was most stable at pH 8.5 (%RSD = 5.6, n = 70, 0.25 mmol L(-1) glycerol). The detection and quantification limits were 2.8 x 10(-6) and 9.4 x 10(-6) mol L(-1), respectively, and the linear working range was between 1.0 x 10(-5) and 1.0 x 10(-4) mol L(-1). To assess the effect of interferences, and recovery by the probe we analyzed samples taken during fermentation of chemically defined grape juice medium and compared the results with those obtained by HPLC.
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Affiliation(s)
- A Radoi
- Dipartimento di Scienze e Tecnologie Chimiche, Università Tor Vergata, via della Ricerca Scientifica 1, 00133, Rome, Italy
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Compagnone D, Isoldi G, Moscone D, Palleschi G. AMPEROMETRIC DETECTION OF BIOGENIC AMINES IN CHEESE USING IMMOBILISED DIAMINE OXIDASE. ANAL LETT 2006. [DOI: 10.1081/al-100103596] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Volpe G, Ammid NH, Moscone D, Occhigrossi L, Palleschi G. Development of an Immunomagnetic Electrochemical Sensor for Detection of BT‐CRY1AB/CRY1AC Proteins in Genetically Modified Corn Samples. ANAL LETT 2006. [DOI: 10.1080/00032710600713339] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Volpe G, Fares G, delli Quadri F, Draisci R, Ferretti G, Marchiafava C, Moscone D, Palleschi G. A disposable immunosensor for detection of 17β-estradiol in non-extracted bovine serum. Anal Chim Acta 2006; 572:11-6. [PMID: 17723455 DOI: 10.1016/j.aca.2006.05.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2006] [Revised: 04/27/2006] [Accepted: 05/01/2006] [Indexed: 10/24/2022]
Abstract
This paper reports the assembly of a disposable immunosensor based on the direct competitive enzyme-linked immunosorbent assay (ELISA), for simple and fast measurement of 17beta-estradiol (17beta-E2) in bovine serum, using screen-printed electrodes (SPEs) and a Palm-Sens portable electrochemical detector. The immunosensor strip was assembled immobilising, by passive adsorption, anti-rabbit IgG onto the surface of the working SPE electrode. After the interaction between anti-rabbit IgG and rabbit anti-17beta-E2 polyclonal antibodies (PAb), the competition was performed using 17beta-estradiol-alkaline phosphatase conjugate (17beta-E2-AP) synthesised in our laboratory. The enzymatic substrate used for signal generation was 1-naphthylphosphate and its conversion to an electroactive product (1-naphthol) was measured using differential pulse voltammetry (DPV). To develop a prototype for field measurements, the entire competitive protocol has been optimised directly in a blank non-extracted bovine serum. According to the new EU criteria established by the Commission Decision 2002/657/EC for qualitative and quantitative screening methods, the detection capability (CCbeta), was determined. The CCbeta value resulted below the action limit (40 pg mL(-1)) fixed for 17beta-E2) Spiked and real samples were analysed using the electrochemical immunostrips obtaining precision values (relative standard deviation, R.S.D.%) ranging from 8.6 to 17.0% and a recovery (R%) from 88.2 to 120.0%. Results obtained on real samples were confirmed by liquid chromatography coupled on-line with tandem mass spectrometry (LC-MS/MS) using an atmospheric pressure chemical ionisation (APCI) source and a heated nebulizer (HN) interface; this is the method currently used to confirm illegal hormone administration for regulatory purposes. The disposable immunosensor appears suitable as a screening tool for field analysis of bovine serum estradiol.
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Affiliation(s)
- G Volpe
- Dipartimento di Scienze e Tecnologie Chimiche, Università Tor Vergata, via della Ricerca Scientifica, 00133 Roma, Italy.
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Delibato E, Volpe G, Stangalini D, De Medici D, Moscone D, Palleschi G. Development of SYBR‐Green Real‐Time PCR and a Multichannel Electrochemical Immunosensor for Specific Detection ofSalmonella enterica. ANAL LETT 2006. [DOI: 10.1080/00032710600713354] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ammida NHS, Micheli L, Piermarini S, Moscone D, Palleschi G. Detection of Aflatoxin B1in Barley: Comparative Study of Immunosensor and HPLC. ANAL LETT 2006. [DOI: 10.1080/00032710600713248] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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