1
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Chahin N, Escobar-Nassar S, Osma J, Bashammakh AS, AlYoubi AO, Ortiz M, O’Sullivan CK. Low-Cost Platform for Multiplexed Electrochemical Melting Curve Analysis. ACS Meas Sci Au 2022; 2:147-156. [PMID: 35479100 PMCID: PMC9031717 DOI: 10.1021/acsmeasuresciau.1c00044] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/15/2021] [Accepted: 11/15/2021] [Indexed: 06/14/2023]
Abstract
Detection and identification of single nucleotide polymorphisms (SNPs) have garnered increasing interest in the past decade, finding potential application in detection of antibiotic resistance, advanced forensic science, as well as clinical diagnostics and prognostics, moving toward the realization of personalized medicine. Many different techniques have been developed for genotyping SNPs, and ideally these techniques should be rapid, easy-to-use, cost-effective, flexible, scalable, easily automated, and requiring minimal end-user intervention. While high-resolution melting curve analysis has been widely used for the detection of SNPs, fluorescence detection does not meet many of the desired requirements, and electrochemical detection is an attractive alternative due to its high sensitivity, simplicity, cost-effectiveness, and compatibility with microfabrication. Herein, we describe the multiplexed electrochemical melting curve analysis of duplex surfaces tethered to electrodes of an array. In this approach, thiolated probes designed to hybridize to a DNA sequence containing the SNP to be interrogated are immobilized on gold electrodes. Asymmetric PCR using a ferrocene-labeled forward primer is used to generate this single-stranded redox-labeled PCR amplicon. Following hybridization with the probe immobilized on the electrode surface, the electrode array is exposed to a controlled ramping of temperature, with concomitant constant washing of the electrode array surface while simultaneously carrying out voltammetric measurements. The optimum position of the site complementary to the SNP site in the immobilized probe to achieve maximum differentiation in melting temperature between wild-type and single base mismatch, thus facilitating allelic discrimination, was determined and applied to the detection of a cardiomyopathy associated SNP.
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Affiliation(s)
- Nassif Chahin
- Departament
d’Enginyeria Química, Universitat
Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain
| | - Santiago Escobar-Nassar
- Department
of Electrical and Electronics Engineering, Universidad de los Andes, Cra. 1E No. 19a-40, Bogotá, DC 111711, Colombia
| | - Johann Osma
- Department
of Electrical and Electronics Engineering, Universidad de los Andes, Cra. 1E No. 19a-40, Bogotá, DC 111711, Colombia
| | - Abdulaziz S. Bashammakh
- Department
of Chemistry, Faculty of Science, King Abdulaziz
University, 21589 Jeddah, Kingdom of Saudi
Arabia
| | - Abdulrahman O. AlYoubi
- Department
of Chemistry, Faculty of Science, King Abdulaziz
University, 21589 Jeddah, Kingdom of Saudi
Arabia
| | - Mayreli Ortiz
- Departament
d’Enginyeria Química, Universitat
Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain
| | - Ciara K. O’Sullivan
- Departament
d’Enginyeria Química, Universitat
Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain
- ICREA, Passeig Lluis Companys 23, 08010 Barcelona, Spain
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2
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Shkembi X, Skouridou V, Svobodova M, Leonardo S, Bashammakh AS, Alyoubi AO, Campàs M, O Sullivan CK. Hybrid Antibody-Aptamer Assay for Detection of Tetrodotoxin in Pufferfish. Anal Chem 2021; 93:14810-14819. [PMID: 34697940 PMCID: PMC8581965 DOI: 10.1021/acs.analchem.1c03671] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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] [Indexed: 12/15/2022]
Abstract
![]()
The marine toxin
tetrodotoxin (TTX) poses a great risk to public
health safety due to its severe paralytic effects after ingestion.
Seafood poisoning caused by the consumption of contaminated marine
species like pufferfish due to its expansion to nonendemic areas has
increased the need for fast and reliable detection of the toxin to
effectively implement prevention strategies. Liquid chromatography-mass
spectrometry is considered the most accurate method, although competitive
immunoassays have also been reported. In this work, we sought to develop
an aptamer-based assay for the rapid, sensitive, and cost-effective
detection of TTX in pufferfish. Using capture-SELEX combined with
next-generation sequencing, aptamers were identified, and their binding
properties were evaluated. Finally, a highly sensitive and user-friendly
hybrid antibody–aptamer sandwich assay was developed with superior
performance compared to several assays reported in the literature
and commercial immunoassay kits. The assay was successfully applied
to the quantification of TTX in pufferfish extracts, and the results
obtained correlated very well with a competitive magnetic bead-based
immunoassay performed in parallel for comparison. This is one of the
very few works reported in the literature of such hybrid assays for
small-molecule analytes whose compatibility with field samples is
also demonstrated.
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Affiliation(s)
- Xhensila Shkembi
- Interfibio, Nanobiotechnology and Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Paisos Catalans 26, 43007 Tarragona, Spain
| | - Vasso Skouridou
- Interfibio, Nanobiotechnology and Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Paisos Catalans 26, 43007 Tarragona, Spain
| | - Marketa Svobodova
- Interfibio, Nanobiotechnology and Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Paisos Catalans 26, 43007 Tarragona, Spain
| | - Sandra Leonardo
- IRTA, Ctra. Poble Nou km 5.5, 43540 Sant Carles de la Ràpita, Spain
| | - Abdulaziz S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, 21589 Jeddah, Kingdom of Saudi Arabia
| | - Abdulrahman O Alyoubi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, 21589 Jeddah, Kingdom of Saudi Arabia
| | - Mònica Campàs
- IRTA, Ctra. Poble Nou km 5.5, 43540 Sant Carles de la Ràpita, Spain
| | - Ciara K O Sullivan
- Interfibio, Nanobiotechnology and Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Paisos Catalans 26, 43007 Tarragona, Spain.,Institució Catalana de Recerca I Estudis Avancats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain
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3
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Alourfi NM, Mohammed GI, Nassef HM, Alwael H, Bahaidarah EA, Bashammakh AS, Mujawar LH, El-Shahawi MS. A highly Sensitive Modified Glassy Carbon Electrode with Carboxylated Multi-walled Carbon Nanotubes/Nafion Nano composite for Efficient and Cheap Voltammetric Sensing of Dianabol Steroid in Biological Fluid. ANAL SCI 2021; 37:1795-1802. [PMID: 34373387 DOI: 10.2116/analsci.21p167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The extraordinary prerequisite for the analysis of an anabolic steroid, namely dianabol (DB), has inspired towards the development of a cost-effective and high-performance sensing probe. Thus, a simple and robust electrochemical sensor (c-MWCNTs-Nafion®lGCE) for dianabol (DB), a widely used steroid, was developed using a glassy carbon electrode (GCE) modified with functionalized carboxylated multi-walled carbon nanotubes (c-MWCNT) and Nafion®. At pH 7 - 8, differential pulse-cathodic stripping voltammetry (DP-CSV) displayed two cathodic peaks at -0.85 and -1.35 V that varied linearly over a wide range (9.0 × 10-9 (2.7 μg L-1) - 9.0 × 10-6 (2.7 × 103 μg L-1) mol L-1) and 2.9 × 10-6 (8.7 × 102 μg L-1) - 8.0 × 10-5 (2.4 × 104 μg L-1) mol L-1) of DB concentrations, respectively. The low limits of detection and quantification at peak I (-0.85 V) were 2.7 × 10-9 (8.1 × 10-1 ng mL-1) and 9.0 × 10-9 (2.7 ng mL-1) mol L-1, respectively. The repeatability and reproducibility displayed relative standard deviations lower than 5%. The method was applied for DB analysis in human urine and subsequently compared with the standard HPLC method. Interference of common metabolites in biological fluids samples to DB sensing was insignificant. This method has distinctive advantages e.g. precise, short analytical time, sensitive, economical, reproducible and miniaturized sample preparation for DB analysis in biological samples of human origin.
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Affiliation(s)
- Nouf M Alourfi
- Department of Chemistry, Faculty of Science, King Abdulaziz University
| | - Gharam I Mohammed
- Department of Chemistry, Faculty of Science, King Abdulaziz University.,Department of Chemistry, Faculty of Applied Science, Umm AL-Qura University
| | - Hossam M Nassef
- Department of Chemistry, Faculty of Science at Yanbu, Taibah University.,Department of Chemistry, Faculty of Science, Damietta University
| | - Hassan Alwael
- Department of Chemistry, Faculty of Science, King Abdulaziz University
| | | | | | - Liyakat H Mujawar
- Center of Excellence in Environmental Studies, King Abdulaziz University
| | - Mohammad S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University.,Department of Chemistry, Faculty of Science, Damietta University
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4
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Liyanage PY, Zhou Y, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Vanni S, Graham RM, Leblanc RM. Pediatric glioblastoma target-specific efficient delivery of gemcitabine across the blood-brain barrier via carbon nitride dots. Nanoscale 2020; 12:7927-7938. [PMID: 32232249 DOI: 10.1039/d0nr01647k] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Pediatric glioblastomas are known to be one of the most dangerous and life-threatening cancers among many others regardless of the low number of cases reported. The major obstacles in the treatment of these tumors can be identified as the lack of prognosis data and the therapeutic requirement to be able to cross the blood-brain barrier (BBB). Due to this lack of data and techniques, pediatric patients could face drastic side effects over a long-time span even after survival. Therefore, in this study, the capability of non-toxic carbon nitride dots (CNDs) to selectively target pediatric glioblastoma cells was studied in vitro. Furthermore, the nanocarrier capability and efficiency of CNDs were also investigated through conjugation of a chemotherapeutic agent and transferrin (Tf) protein. Gemcitabine (GM) was introduced into the system as a chemotherapeutic agent, which has never been successfully used for the treatment of any central nervous system (CNS) cancer. More than 95% of selective damage of SJGBM2 glioma cells was observed at 1 μM of CN-GM conjugate with almost 100% viability of non-cancerous HEK293 cells, although this ability was diminished at lower concentrations. However, further conjugation of Tf to obtain CN-GM-Tf allowed the achievement of selective targeting and prominent anti-cancer activity at a 100-fold lower concentration of 10 nM. Furthermore, both conjugates were capable of effectively damaging several other brain tumor cells, which were not well responsive towards the single treatment of GM. The capability of BBB penetration of the conjugates was observed using a zebrafish model, which confirms the CNDs' competence as an excellent nanocarrier to the CNS.
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Affiliation(s)
- Piumi Y Liyanage
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA.
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5
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Mohammed GI, Ahmad W, Alwael H, Saigl ZM, Al-Eryani DA, Bashammakh AS, El-Shahawi MS. A quercetin based fluorescent chemical sensor for ultra-sensitive determination and speciation of tungsten species in water. Spectrochim Acta A Mol Biomol Spectrosc 2020; 229:117929. [PMID: 31918153 DOI: 10.1016/j.saa.2019.117929] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 12/05/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023]
Abstract
The current study explores the use of quercetin for developing a highly selective spectrofluorimetric methodology for trace determination, speciation and thermodynamic characterization of tungstate (WO42-) species in water. The study relies on the principle of chelate formation between WO42- and quercetin with subsequent increase in the emission intensity. The developed method could be applied successfully in a wide linear range (1.0-400.0 μg L-1) with a detection limit of 0.28 μg L-1 and quantification limit of 0.92 μg L-1 at λex/em = 400/492 nm. The developed method was successfully applied in real tap and waste water samples. The suitability of the proposed method was further validated by inductively coupled plasma-optical emission spectrometry (ICP-OES) in terms of student's t and F tests at 95% confidence. Characterization (NMR, FTIR and electronic spectra), stoichiometry, stability constant, fluorescence mechanism and thermodynamic parameters (ΔH, ΔS, and ΔG) of the produced complex species were evaluated and properly assigned. The fluorescence quenching mechanism of tungstate quercetin complex by Triton X-100 was also evaluated for computing Stern-Volmer quenching constant and approximating quenching sphere. The method showed a clear significance over most of the reported methods for tungsten in literature in terms of good accuracy, robustness, ruggedness, short analytical time and cost-effectiveness.
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Affiliation(s)
- G I Mohammed
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Department of Chemistry, Faculty of Applied Sciences, Umm AL-Qura University, Makkah, Saudi Arabia
| | - W Ahmad
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - H Alwael
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Z M Saigl
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - D A Al-Eryani
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - A S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - M S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
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6
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Paudyal S, Sharma SK, da Silva RL, Mintz KJ, Liyanage PY, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Leblanc RM. Tyrosinase enzyme Langmuir monolayer: Surface chemistry and spectroscopic study. J Colloid Interface Sci 2020; 564:254-263. [DOI: 10.1016/j.jcis.2019.12.118] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/25/2019] [Accepted: 12/26/2019] [Indexed: 02/08/2023]
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7
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Jauset-Rubio M, Botero ML, Skouridou V, Aktas GB, Svobodova M, Bashammakh AS, El-Shahawi MS, Alyoubi AO, O’Sullivan CK. One-Pot SELEX: Identification of Specific Aptamers against Diverse Steroid Targets in One Selection. ACS Omega 2019; 4:20188-20196. [PMID: 31815219 PMCID: PMC6893951 DOI: 10.1021/acsomega.9b02412] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 11/01/2019] [Indexed: 05/10/2023]
Abstract
Aptamers are well-established biorecognition molecules used in a wide variety of applications for the detection of their respective targets. However, individual SELEX processes typically performed for the identification of aptamers for each target can be quite time-consuming, labor-intensive, and costly. An alternative strategy is proposed herein for the simultaneous identification of different aptamers binding distinct but structurally similar targets in one single selection. This one-pot SELEX approach, using the steroids estradiol, progesterone, and testosterone as model targets, was achieved by combining the benefits of counter-SELEX with the power of next-generation sequencing and bioinformatics analysis. The pools from the last stage of the selection were compared in order to discover sequences with preferential abundance in only one of the pools. This led to the identification of aptamer candidates with potential specificity to a single steroid target. Binding studies demonstrated the high affinity of each selected aptamer for its respective target, and low nanomolar range dissociation constants calculated were similar to those previously reported for steroid-binding aptamers selected using traditional SELEX approaches. Finally, the selected aptamers were exploited in microtiter plate assays, achieving nanomolar limits of detection, while the specificity of these aptamers was also demonstrated. Overall, the one-pot SELEX strategy led to the discovery of aptamers for three different steroid targets in one single selection without compromising their affinity or specificity, demonstrating the power of this approach of aptamer discovery for the simultaneous selection of aptamers against multiple targets.
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Affiliation(s)
- Miriam Jauset-Rubio
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans
26, 43007 Tarragona, Spain
| | - Mary Luz Botero
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans
26, 43007 Tarragona, Spain
| | - Vasso Skouridou
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans
26, 43007 Tarragona, Spain
- E-mail: . Phone: +34977558576 (V.S.)
| | - Gülsen Betül Aktas
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans
26, 43007 Tarragona, Spain
| | - Marketa Svobodova
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans
26, 43007 Tarragona, Spain
| | - Abdulaziz S. Bashammakh
- Department
of Chemistry, Faculty of Science, King Abdulaziz
University, P.O. Box 80203, 21589 Jeddah, Saudi Arabia
| | - Mohammad S. El-Shahawi
- Department
of Chemistry, Faculty of Science, King Abdulaziz
University, P.O. Box 80203, 21589 Jeddah, Saudi Arabia
| | - Abdulrahman O. Alyoubi
- Department
of Chemistry, Faculty of Science, King Abdulaziz
University, P.O. Box 80203, 21589 Jeddah, Saudi Arabia
| | - Ciara K. O’Sullivan
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans
26, 43007 Tarragona, Spain
- Institució
Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain
- E-mail: . Phone: +34977559651 (C.K.O.)
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8
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Zhou Y, Liyanage PY, Devadoss D, Rios Guevara LR, Cheng L, Graham RM, Chand HS, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Leblanc RM. Nontoxic amphiphilic carbon dots as promising drug nanocarriers across the blood-brain barrier and inhibitors of β-amyloid. Nanoscale 2019; 11:22387-22397. [PMID: 31730144 DOI: 10.1039/c9nr08194a] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The blood-brain barrier (BBB) is a main obstacle for drug delivery targeting the central nervous system (CNS) and treating Alzheimer's disease (AD). In order to enhance the efficiency of drug delivery without harming the BBB integrity, nanoparticle-mediated drug delivery has become a popular therapeutic strategy. Carbon dots (CDs) are one of the most promising and novel nanocarriers. In this study, amphiphilic yellow-emissive CDs (Y-CDs) were synthesized with an ultrasonication-mediated methodology using citric acid and o-phenylenediamine with a size of 3 nm that emit an excitation-independent yellow photoluminescence (PL). The content of primary amine and carboxyl groups on CDs was measured as 6.12 × 10-5 and 8.13 × 10-3 mmol mg-1, respectively, indicating the potential for small-molecule drug loading through bioconjugation. Confocal image analyses revealed that Y-CDs crossed the BBB of 5-day old wild-type zebrafish, most probably by passive diffusion due to the amphiphilicity of Y-CDs. And the amphiphilicity and BBB penetration ability didn't change when Y-CDs were coated with different hydrophilic molecules. Furthermore, Y-CDs were observed to enter cells to inhibit the overexpression of human amyloid precursor protein (APP) and β-amyloid (Aβ) which is a major factor responsible for AD pathology. Therefore, data suggest that Y-CDs have a great potential as nontoxic nanocarriers for drug delivery towards the CNS as well as a promising inhibiting agent of Aβ-related pathology of the AD.
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Affiliation(s)
- Yiqun Zhou
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA.
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Ahmad W, Mohammed GI, Al-Eryani DA, Saigl ZM, Alyoubi AO, Alwael H, Bashammakh AS, O'Sullivan CK, El-Shahawi MS. Biogenic Amines Formation Mechanism and Determination Strategies: Future Challenges and Limitations. Crit Rev Anal Chem 2019; 50:485-500. [PMID: 31486337 DOI: 10.1080/10408347.2019.1657793] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The evolution in foodstuff-monitoring processes has increased the number of studies on biogenic amines (BAs), in recent years. This trend with future perspective needs to be assembled to address the associated health risks. Thus, this study aims to cover three main aspects of BAs: (i) occurrence, physiology, and toxicological effects, most probable formation mechanisms and factors controlling their growth; (ii) recent advances, strategies for determination, preconcentration steps, model technique, and nature of the matrix; and (iii) milestone, limitations with existing methodologies, future trends, and detailed expected developments for clinical use and on-site ultra-trace determination. The core of the ongoing review will discuss recent trends in pre-concentration toward miniaturization, automation, and possible coupling with electrochemical techniques, surface-enhanced Raman scattering, spectrofluorimetry, and lateral flow protocols to be exploited for the development of rapid, facile, and sensitive on-site determination strategies for BAs.
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Affiliation(s)
- Waqas Ahmad
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - G I Mohammed
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Chemistry, Faculty of Applied Sciences, Umm Al Qura University, Makka, Saudi Arabia
| | - D A Al-Eryani
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Z M Saigl
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - A O Alyoubi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - H Alwael
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - A S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - C K O'Sullivan
- Nanobiotechnology & Bioanalysis Group, Department d Enginyeria Quimica, Universitat i Virgili, Tarragona, Spain
| | - M S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
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10
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Mairal Lerga T, Jauset-Rubio M, Skouridou V, Bashammakh AS, El-Shahawi MS, Alyoubi AO, O'Sullivan CK. High Affinity Aptamer for the Detection of the Biogenic Amine Histamine. Anal Chem 2019; 91:7104-7111. [PMID: 31042376 DOI: 10.1021/acs.analchem.9b00075] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The importance of histamine in various physiological functions and its involvement in allergenic responses make this small molecule one of the most studied biogenic amines. Even though a variety of chromatography-based methods have been described for its analytical determination, the disadvantages they present in terms of cost, analysis time, and low portability limit their suitability for in situ routine testing. In this work, we sought to identify histamine-binding aptamers that could then be exploited for the development of rapid, facile, and sensitive assays for histamine detection suitable for point-of-need analysis. A classic SELEX process was designed employing magnetic beads for target immobilization and the selection was completed after ten rounds. Following Next Generation Sequencing of the last selection rounds from both positive and counter selection magnetic beads, several sequences were identified and initially screened using an apta-PCR affinity assay (APAA). Structural and functional characterization of the candidates resulted in the identification of the H2 aptamer. The high binding affinity of the H2 aptamer to histamine was validated using four independent assays ( KD of 3-34 nM). Finally, the H2 aptamer was used for the development of a magnetic beads-based competitive assay for the detection of histamine in both buffer and synthetic urine, achieving very low limits of detection of 18 pM and 76 pM, respectively, while no matrix effects were observed. These results highlight the suitability of the strategy followed for identifying small molecule-binding aptamers and the compatibility of the selected H2 aptamer with the analysis of biological samples, thus facilitating the development of point-of-care devices for routine testing. Ongoing work is focused on extending the application of the H2 aptamer to the detection of spoilage in meat, fish, and beverages, as well as evaluating the affinity of truncated forms of the aptamer.
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Affiliation(s)
- Teresa Mairal Lerga
- Nanobiotechnology & Bioanalysis Group, INTERFIBIO Consolidated Research Group, Departament d'Enginyeria Quimica , Universitat Rovira I Virgili , Avinguda Paı̈sos Catalans 26 , 43007 Tarragona , Spain
| | - Miriam Jauset-Rubio
- Nanobiotechnology & Bioanalysis Group, INTERFIBIO Consolidated Research Group, Departament d'Enginyeria Quimica , Universitat Rovira I Virgili , Avinguda Paı̈sos Catalans 26 , 43007 Tarragona , Spain
| | - Vasso Skouridou
- Nanobiotechnology & Bioanalysis Group, INTERFIBIO Consolidated Research Group, Departament d'Enginyeria Quimica , Universitat Rovira I Virgili , Avinguda Paı̈sos Catalans 26 , 43007 Tarragona , Spain
| | - Abdulaziz S Bashammakh
- Department of Chemistry, Faculty of Science , King Abdulaziz University , P.O. Box 80203, 21589 Jeddah , Saudi Arabia
| | - Mohammad S El-Shahawi
- Department of Chemistry, Faculty of Science , King Abdulaziz University , P.O. Box 80203, 21589 Jeddah , Saudi Arabia
| | - Abdulrahman O Alyoubi
- Department of Chemistry, Faculty of Science , King Abdulaziz University , P.O. Box 80203, 21589 Jeddah , Saudi Arabia
| | - Ciara K O'Sullivan
- Nanobiotechnology & Bioanalysis Group, INTERFIBIO Consolidated Research Group, Departament d'Enginyeria Quimica , Universitat Rovira I Virgili , Avinguda Paı̈sos Catalans 26 , 43007 Tarragona , Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA) , Passeig Lluís Companys 23 , 08010 Barcelona , Spain
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11
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Skouridou V, Tomaso H, Rau J, Bashammakh AS, El-Shahawi MS, Alyoubi AO, O'Sullivan CK. Duplex PCR-ELONA for the detection of pork adulteration in meat products. Food Chem 2019; 287:354-362. [PMID: 30857710 DOI: 10.1016/j.foodchem.2019.02.095] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 02/08/2019] [Accepted: 02/21/2019] [Indexed: 01/22/2023]
Abstract
In this work, a duplex PCR-Enzyme Linked Oligonucleotide Assay (ELONA) is reported for the sensitive and reliable detection of pork adulteration in beef and chicken products, two of the most widely consumed meat types in the world. The strategy relies on the use of species-specific tailed primers for duplex amplification and simple dilution of the PCR reactions for direct colorimetric detection via hybridization, eliminating the need for any other post-amplification steps. A high sensitivity was achieved, with as low as 71-188 pg of genomic DNA able to be detected using mixtures of control DNA from each species. The strategy was validated using DNA add-mixtures as well as DNA extracted from raw meat mixtures and 0.5-1% w/w pork could be easily detected when mixed with beef or chicken. The proposed approach is simple, sensitive and cost-effective compared to equivalent commercial kits suitable for detecting adulterant pork levels in meat products.
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Affiliation(s)
- Vasso Skouridou
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain.
| | - Herbert Tomaso
- Friedrich-Loeffler-Institut, Institute of Bacterial Infections and Zoonoses, Naumburger Strasse 96a, 07743 Jena, Germany
| | - Jörg Rau
- Chemical and Veterinary Investigation Office Stuttgart, Schaflandstrasse 3/2, 70736 Fellbach, Germany
| | - Abdulaziz S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, 21589 Jeddah, Saudi Arabia
| | - Mohammad S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, 21589 Jeddah, Saudi Arabia
| | - Abdulrahman O Alyoubi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, 21589 Jeddah, Saudi Arabia
| | - Ciara K O'Sullivan
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain.
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12
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Jauset-Rubio M, Tomaso H, El-Shahawi MS, Bashammakh AS, Al-Youbi AO, O'Sullivan CK. Duplex Lateral Flow Assay for the Simultaneous Detection of Yersinia pestis and Francisella tularensis. Anal Chem 2018; 90:12745-12751. [PMID: 30296053 DOI: 10.1021/acs.analchem.8b03105] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
High-risk pathogens such as Francisella tularensis and Yersinia pestis are categorized as highly hazardous organisms that can be used as biological weapons. Given the extreme infectivity of these potential biowarfare agents, a rapid, sensitive, cost-effective, and specific method for their detection is required. Here, we report the multiplexed amplification detection of genomic DNA from Francisella tularensis and Yersinia pestis. Amplification was achieved using isothermal recombinase polymerase amplification, exploiting tailed primers, followed by detection using a nucleic-acid lateral flow assay. Excess primers were removed using a novel fishing strategy, avoiding the use of postamplification purification that requires centrifugation and infers additional assay cost. The entire assay is completed in less than 1 h, achieving limits of detection of 243 fg (1.21 × 102 genome equivalent) and 4 fg (0.85 genome equivalent) for Francisella tularensis and Yersinia pestis, respectively.
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Affiliation(s)
- Miriam Jauset-Rubio
- INTERFIBIO Consolidated Research Group, Department of Chemical Engineering , Universitat Rovira I Virgili , 43007 Tarragona , Spain
| | - Herbert Tomaso
- Friedrich-Loeffler-Institut, Institute of Bacterial Infections and Zoonoses , Naumburger Strasse 96a , 07743 Jena , Germany
| | - Mohammad S El-Shahawi
- Department of Chemistry, Faculty of Science , King Abdulaziz University , P.O. Box 80203, Jeddah 21589 , Kingdom of Saudi Arabia
| | - Abdulaziz S Bashammakh
- Department of Chemistry, Faculty of Science , King Abdulaziz University , P.O. Box 80203, Jeddah 21589 , Kingdom of Saudi Arabia
| | - Abdulrahman O Al-Youbi
- Department of Chemistry, Faculty of Science , King Abdulaziz University , P.O. Box 80203, Jeddah 21589 , Kingdom of Saudi Arabia
| | - Ciara K O'Sullivan
- INTERFIBIO Consolidated Research Group, Department of Chemical Engineering , Universitat Rovira I Virgili , 43007 Tarragona , Spain.,Institució Catalana de Recerca I Estudis Avancats , Passeig Lluís Companys 23 , 08010 Barcelona , Spain
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13
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Espiritu CAL, Justo CAC, Rubio MJ, Svobodova M, Bashammakh AS, Alyoubi AO, Rivera WL, Rollon AP, O’Sullivan CK. Aptamer Selection against a Trichomonas vaginalis Adhesion Protein for Diagnostic Applications. ACS Infect Dis 2018; 4:1306-1315. [PMID: 29972299 DOI: 10.1021/acsinfecdis.8b00065] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Trichomoniasis, caused by Trichomonas vaginalis, is the leading nonviral sexually transmitted infection worldwide. We report the selection of a DNA aptamer against a T. vaginalis adhesion protein, AP65, using a microtiter plate-based in vitro combinatorial chemistry process termed systematic evolution of ligands by exponential enrichment. The enriched library pool was sequenced by next-generation sequencing, and several aptamer candidates with high affinity and specificity were identified. The aptamer with the highest affinity and specificity had a KD in the low nanomolar range, as confirmed by three different techniques: surface plasmon resonance, enzyme-linked aptamer assay, and biolayer interferometry. The selected aptamer was demonstrated to have a high specificity to the AP65 protein and to T. vaginalis cells with no cross-reactivity to other enteric and urogenital microorganisms. Current work is focused on the development of inexpensive and easy-to-use aptamer-based diagnostic assays for the reliable and rapid detection of T. vaginalis in vaginal swabs.
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Affiliation(s)
| | | | - Miriam Jauset Rubio
- Interfibio Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans, 26, Tarragona 43007, Spain
| | - Marketa Svobodova
- Interfibio Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans, 26, Tarragona 43007, Spain
| | - Abdulaziz S. Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Kingdom of Saudi Arabia
| | - Abdulrahman O. Alyoubi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Kingdom of Saudi Arabia
| | | | | | - Ciara K. O’Sullivan
- Interfibio Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans, 26, Tarragona 43007, Spain
- Institució Catalana de Recerca i Estudis Avançats, Passeig Lluis Companys 23, Barcelona 08010, Spain
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14
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Peng Z, Li J, Li S, Pardo J, Zhou Y, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Leblanc RM. Quantification of Nucleic Acid Concentration in the Nanoparticle or Polymer Conjugates Using Circular Dichroism Spectroscopy. Anal Chem 2018; 90:2255-2262. [DOI: 10.1021/acs.analchem.7b04621] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhili Peng
- College
of Pharmacy and Chemistry, Dali University, Dali, Yunnan 671000, P. R. China
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States
| | - Jiaojiao Li
- Department
of Cellular Biology and Pharmacology, Herbert Wertheim College of
Medicine, Florida International University, 11200 S.W. 8th Street, Miami, Florida 33199, United States
| | - Shanghao Li
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States
- MP Biomedicals, 3 Hutton
Center Drive, #100, Santa Ana, California 92707, United States
| | - Joel Pardo
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States
| | - Yiqun Zhou
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States
| | - Abdulrahman O. Al-Youbi
- Department
of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia
| | - Abdulaziz S. Bashammakh
- Department
of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia
| | - Mohammad S. El-Shahawi
- Department
of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia
| | - Roger M. Leblanc
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States
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15
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16
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Waidely E, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Leblanc RM. Alpha-l-Fucosidase Immunoassay for Early Detection of Hepatocellular Carcinoma. Anal Chem 2017; 89:9459-9466. [DOI: 10.1021/acs.analchem.7b02284] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Eric Waidely
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Cox Science
Center, Coral Gables, Florida 33146, United States
| | - Abdulrahman O. Al-Youbi
- Department
of Chemistry, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Kingdom of Saudi Arabia
| | - Abdulaziz S. Bashammakh
- Department
of Chemistry, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Kingdom of Saudi Arabia
| | - Mohammad S. El-Shahawi
- Department
of Chemistry, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Kingdom of Saudi Arabia
| | - Roger M. Leblanc
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Cox Science
Center, Coral Gables, Florida 33146, United States
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17
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Peng Z, Han X, Li S, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Leblanc RM. Carbon dots: Biomacromolecule interaction, bioimaging and nanomedicine. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.06.001] [Citation(s) in RCA: 229] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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18
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Skouridou V, Schubert T, Bashammakh AS, El-Shahawi MS, Alyoubi AO, O'Sullivan CK. Aptatope mapping of the binding site of a progesterone aptamer on the steroid ring structure. Anal Biochem 2017; 531:8-11. [PMID: 28499498 DOI: 10.1016/j.ab.2017.05.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/05/2017] [Accepted: 05/08/2017] [Indexed: 01/19/2023]
Abstract
In this work we report the mapping of the binding site of the only progesterone aptamer published to date, in an approach referred to as aptatope mapping. By linking the binding data obtained from microscale thermophoresis analysis to the structural differences on the ring structure of a range of steroids, we elucidated the moieties involved in aptamer-progesterone binding. This approach can be further exploited for the characterization of aptamer specificity and ultimately facilitate the development of aptamer-based assays depending on the desired specificity.
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Affiliation(s)
- Vasso Skouridou
- Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain.
| | | | - Abdulaziz S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Mohammad S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Abdulrahman O Alyoubi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Ciara K O'Sullivan
- Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, Barcelona 08010, Spain.
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19
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Svobodová M, Skouridou V, Botero ML, Jauset-Rubio M, Schubert T, Bashammakh AS, El-Shahawi MS, Alyoubi AO, O'Sullivan CK. The characterization and validation of 17β-estradiol binding aptamers. J Steroid Biochem Mol Biol 2017; 167:14-22. [PMID: 27669644 DOI: 10.1016/j.jsbmb.2016.09.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/12/2016] [Accepted: 09/22/2016] [Indexed: 01/26/2023]
Abstract
The rapid and sensitive detection of small molecules is garnering increasing importance, and aptamers show great promise in replacing expensive, elaborate detection platforms exploiting chromatographic separation or antibody-based assays. The characterization of aptamer interaction with small molecule targets is not facile, and there is a mature need for a rapid, high-throughput technique for the analysis of aptamer-small molecule kinetics and affinity. In this work we present methodologies for the evaluation of aptamer-small molecule interactions, using the aptamers reported against the steroid 17β-estradiol as a model system. Microscale thermophoresis, apta-PCR affinity assay and surface plasmon resonance were explored to evaluate the reported aptamers' binding properties in terms of affinity and specificity, and were demonstrated to be successfully applied to the analysis of aptamer-small molecule interactions.
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Affiliation(s)
- Markéta Svobodová
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain
| | - Vasso Skouridou
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain.
| | - Mary Luz Botero
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain
| | - Miriam Jauset-Rubio
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain
| | - Thomas Schubert
- 2bind GmbH, Josef Engert Strasse 13, Regensburg 93053, Germany
| | - Abdulaziz S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Mohammad S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Abdulrahman O Alyoubi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Ciara K O'Sullivan
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, Barcelona 08010, Spain.
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20
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El-Shahawi MS, Bashammakh AS, Alwael H, Alsibaai AA, Dowaidar AM. Adsorption characteristics of polycyclic aromatic hydrocarbons from non-aqueous media using activated carbon derived from phenol formaldehyde resin: kinetics and thermodynamic study. Environ Sci Pollut Res Int 2017; 24:4228-4240. [PMID: 26160120 DOI: 10.1007/s11356-015-4936-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 06/22/2015] [Indexed: 06/04/2023]
Abstract
Porous carbons were prepared by carbonization and activation of phenol formaldehyde resin by gasification with CO2 at 900 °C. Prepared activated carbon from phenol formaldehyde was characterized by measuring thermogravimetry (TG), differential thermal analysis (DTA), pH, surface area, porosity, and pore size distribution. The specific surface area (SSA) of these carbons ranges from 562 to 1904 m2/g, while their point of zero charge (pHPZC) varies from 2.6 to 8.8. The ability of the prepared activated carbon by gasification with CO2 at 900 °C from phenol formaldehyde resin (PFAC) to remove a series of polycyclic aromatic hydrocarbons (PAHs), e.g., naphthalene, fluorene, phenanthrene, pyrene, and fluoranthene, from mixtures of organic solvents with different polarities and chemical structures was tested. The adsorption capacity increases with the increasing the SSA and pHPZC of the carbons, confirming the roles of dispersive interactions. The kinetics and thermodynamics of the adsorption of phenanthrene as a model compound of PAH on PFAC in the organic solvent were studied. The adsorption capacity became notably greater with an increase in contact time and initial phenanthrene concentration.
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Affiliation(s)
- M S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia.
- Department of Chemistry, Faculty of Science, Damiatta University, Damiatta, Egypt.
| | - A S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - H Alwael
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - A A Alsibaai
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - A M Dowaidar
- Department of Chemical Engineering, Faculty of Engineering, UAE University, Al-Ain, United Arab Emirates
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21
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Waidely E, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Leblanc RM. Study of the Alpha-l-Fucosidase Langmuir Monolayer at the Air–Water Interface. J Phys Chem B 2016; 120:12843-12849. [DOI: 10.1021/acs.jpcb.6b09094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eric Waidely
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Cox Science
Center, Coral Gables, Florida 33146, United States
| | - Abdulrahman O. Al-Youbi
- Department
of Chemistry, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Kingdom of Saudi Arabia
| | - Abdulaziz S. Bashammakh
- Department
of Chemistry, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Kingdom of Saudi Arabia
| | - Mohammad S. El-Shahawi
- Department
of Chemistry, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Kingdom of Saudi Arabia
| | - Roger M. Leblanc
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Cox Science
Center, Coral Gables, Florida 33146, United States
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22
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Li S, Skromne I, Peng Z, Dallman J, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Leblanc RM. "Dark" carbon dots specifically "light-up" calcified zebrafish bones. J Mater Chem B 2016; 4:7398-7405. [PMID: 32263740 DOI: 10.1039/c6tb02241c] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Because accidents, disease and aging compromise the structural and physiological functions of bones, the development of an in vivo bone imaging test is critical to identify, detect and diagnose bone related development and dysfunctions. Recent advances in fluorescence instrumentation offer a new alternative for traditional bone imaging methods. However, the development of new in vivo bone imaging fluorescence materials has significantly lagged behind. Here we show that carbon dot nanoparticles (C-dots) with low quantum yield ("dark") bind to calcified bone structures of live zebrafish larvae with high affinity and selectivity. Binding resulted in a strong enhancement of luminescence that was not observed in other tissues, including non-calcified endochondral elements. Retention of C-dots by bones was very stable, long lasting, and with no detectable toxicity. Furthermore, we found C-dots to be a suitable carrier to deliver fluorescein to bones. These observations support a novel and revolutionary use of C-dots as highly specific bioagents for bone imaging and diagnosis, and as bone-specific drug delivery vehicles.
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Affiliation(s)
- Shanghao Li
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, USA.
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23
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Jauset-Rubio M, Svobodová M, Mairal T, McNeil C, Keegan N, El-Shahawi MS, Bashammakh AS, Alyoubi AO, O'Sullivan CK. Aptamer Lateral Flow Assays for Ultrasensitive Detection of β-Conglutin Combining Recombinase Polymerase Amplification and Tailed Primers. Anal Chem 2016; 88:10701-10709. [PMID: 27753473 DOI: 10.1021/acs.analchem.6b03256] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In this work, different methodologies were evaluated in search of robust, simple, rapid, ultrasensitive, and user-friendly lateral flow aptamer assays. In one approach, we developed a competitive based lateral flow aptamer assay, in which β-conglutin immobilized on the test line of a nitrocellulose membrane and β-conglutin in the test sample compete for binding to AuNP labeled aptamer. The control line exploits an immobilized DNA probe complementary to the labeled aptamer, forcing displacement of the aptamer from the β-conglutin-aptamer complex. In a second approach, the competition for aptamer binding takes place off-strip, and following competition, aptamer bound to the immobilized β-conglutin is eluted and used as a template for isothermal recombinase polymerase amplification, exploiting tailed primers, resulting in an amplicon of a duplex flanked by single stranded DNA tails. The amplicon is rapidly and quantitatively detected using a nucleic acid lateral flow with an immobilized capture probe and a gold nanoparticle labeled reporter probe. The competitive lateral flow is completed in just 5 min, achieving a detection limit of 55 pM (1.1 fmol), and the combined competitive-amplification lateral flow requires just 30 min, with a detection limit of 9 fM (0.17 amol).
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Affiliation(s)
- Miriam Jauset-Rubio
- Nanobiotechnology and Bioanalysis group, Department of Chemical Engineering, Universitat Rovira I Virgili , 43007 Tarragona, Spain
| | - Markéta Svobodová
- Nanobiotechnology and Bioanalysis group, Department of Chemical Engineering, Universitat Rovira I Virgili , 43007 Tarragona, Spain
| | - Teresa Mairal
- Nanobiotechnology and Bioanalysis group, Department of Chemical Engineering, Universitat Rovira I Virgili , 43007 Tarragona, Spain
| | - Calum McNeil
- Institute of Cellular Medicine, Diagnostic and Therapeutic Technologies Group, Newcastle University , Newcastle upon Tyne, NE2 4HH, U.K
| | - Neil Keegan
- Institute of Cellular Medicine, Diagnostic and Therapeutic Technologies Group, Newcastle University , Newcastle upon Tyne, NE2 4HH, U.K
| | - Mohammad S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University , P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia
| | - Abdulaziz S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University , P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia
| | - Abdulrahman O Alyoubi
- Department of Chemistry, Faculty of Science, King Abdulaziz University , P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia
| | - Ciara K O'Sullivan
- Nanobiotechnology and Bioanalysis group, Department of Chemical Engineering, Universitat Rovira I Virgili , 43007 Tarragona, Spain.,Institució Catalana de Recerca I Estudis Avancats , Passeig Lluís Companys 23, 08010 Barcelona, Spain
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Peng Z, Li S, Han X, Al-Youbi AO, Bashammakh AS, El-Shahawi MS, Leblanc RM. Determination of the composition, encapsulation efficiency and loading capacity in protein drug delivery systems using circular dichroism spectroscopy. Anal Chim Acta 2016; 937:113-8. [DOI: 10.1016/j.aca.2016.08.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/04/2016] [Accepted: 08/08/2016] [Indexed: 12/30/2022]
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25
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Waidely E, Al-Yuobi ARO, Bashammakh AS, El-Shahawi MS, Leblanc RM. Serum protein biomarkers relevant to hepatocellular carcinoma and their detection. Analyst 2015; 141:36-44. [PMID: 26606739 DOI: 10.1039/c5an01884f] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hepatocellular carcinoma (HCC) is one of the most recurrent and lethal cancers worldwide. The low survival rate of this particular strain of carcinoma is largely due to the late stages at which it is diagnosed. Tumorigenesis of hepatocellular carcinoma is most frequently detected through ultrasonography, magnetic resonance imaging and computerized tomography scans, however, these methods are poor for detection of early tumor development. This review presents alternative hepatocellular carcinoma detection techniques through the use of protein and enzyme/isozyme biomarkers. The detection methods used to determine the serum levels of α-fetoprotein (AFP), glypican-3 (GPC3), Golgi protein 73 (GP73), α-L-fucosidase (AFU), des-γ-carboxyprothrombin (DCP), γ-glutamyl transferase (GGT) and squamous cell carcinoma antigen (SCCA) are presented and each marker's respective validity in the diagnosis of hepatocellular carcinoma is evaluated.
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Affiliation(s)
- Eric Waidely
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Cox Science Center, Coral Gables, FL 33146, USA.
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El-Shahawi MS, Al-Jahdali MS, Bashammakh AS, Al-Sibaai AA, Nassef HM. Spectroscopic and electrochemical characterization of some Schiff base metal complexes containing benzoin moiety. Spectrochim Acta A Mol Biomol Spectrosc 2013; 113:459-465. [PMID: 23792194 DOI: 10.1016/j.saa.2013.04.090] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2012] [Revised: 04/16/2013] [Accepted: 04/24/2013] [Indexed: 06/02/2023]
Abstract
The ligation behavior of bis-benzoin ethylenediamine (B2ED) and benzoin thiosemicarbazone (BTS) Schiff bases towards Ru(3+), Rh(3+), Pd(2+), Ni(2+) and Cu(2+) were determined. The bond length of M-N and spectrochemical parameters (10Dq, β, B and LFSE) of the complexes were evaluated. The redox characteristics of selected complexes were explored by cyclic voltammetry (CV) at Pt working electrode in non aqueous solvents. Au mesh (100 w/in.) optically transparent thin layer electrode (OTTLE) was also used for recording thin layer CV for selected Ru complex. Oxidation of some complexes occurs in a consecutive chemical reaction of an EC type mechanism. The characteristics of electron transfer process of the couples M(2+)/M(3+) and M(3+)/M(4+) (M=Ru(3+), Rh(3+)) and the stability of the complexes towards oxidation and/or reduction were assigned. The nature of the electroactive species and reduction mechanism of selected electrode couples were assigned.
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Affiliation(s)
- M S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
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El-Shahawi MS, Bashammakh AS, Abdelmageed M. Chemical speciation of chromium(III) and (VI) using phosphonium cation impregnated polyurethane foams prior to their spectrometric determination. ANAL SCI 2011; 27:757. [PMID: 21747186 DOI: 10.2116/analsci.27.757] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Fast and selective sorptions of Cr(VI) species from aqueous media onto tetraphenylphosphonium bromide (TPP(+) · Br(-)) physically immobilized polyurethane foams (PUFs) sorbent were achieved. Based on the Scatchard model of binding sites of the PUFs and Langmuir and Dubinin-Radushkevich (D-R) adsorption models of Cr(VI) retention onto TPP(+) · Br(-) immobilized PUFs, a dual retention mechanism involving absorption related to "weak-base anion ion exchange" and an added component for "surface adsorption" was proposed. Thus, the TPP(+) · Br(-) loaded PUFs were successfully packed in column mode for preconcentration of trace and ultra trace concentrations of Cr(VI) as halochromates [CrO(3)C](-)(aq) from aqueous HCl media. The retained [CrOCl(3)](-)(aq) species were recovered with NaOH (1.0 mol L(-1)) and analyzed by flame atomic absorption spectrometry. Cr(III) species after oxidation to Cr(VI) with H(2)O(2) in aqueous KOH (1.0 mol L(-1)) were also retained and could be recovered by the proposed method. The limits of detection (LOD) and quantification (LOQ) of Cr(VI) were 0.04 and 0.13 µg L(-1), respectively. The chemical speciation of Cr(III, VI) species in various water samples at trace and ultra trace levels were carried out by TPP(+) · Br(-) loaded PUFs packed column. The enhancement factor and sensitivity factor of [CrO(3)C](-)(aq) sorption were 80.0 and 30.0, respectively.
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Affiliation(s)
- M S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
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Hamza A, Bashammakh AS, Al-Sibaai AA, Al-Saidi HM, El-Shahawi MS. Part 1. Spectrophotometric determination of trace mercury (II) in dental-unit wastewater and fertilizer samples using the novel reagent 6-hydroxy-3-(2-oxoindolin-3-ylideneamino)-2-thioxo-2H-1,3-thiazin-4(3H)-one and the dual-wavelength beta-correction spectrophotometry. J Hazard Mater 2010; 178:287-292. [PMID: 20149525 DOI: 10.1016/j.jhazmat.2010.01.075] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 01/13/2010] [Accepted: 01/14/2010] [Indexed: 05/28/2023]
Abstract
A simple and low cost method was developed and validated for the determination of trace mercury (II) ions in dental-unit wastewater and fertilizer samples. The method was based upon the reaction of mercury (II) ions with the novel reagent 6-hydroxy-3-(2-oxoindolin-3-ylideneamino)-2-thioxo-2H-1,3-thiazin-4(3H)-one, the formed complex shows an absorption maximum at 505 nm (lambda(max)) in Britton-Robinson (B-R) buffer (pH 4-6).The corrected absorbance of the formed complex at lambda(max) was obtained employing beta-correction spectrophotometric method. Beer's-Lambert law and Ringbom's plots of the colored Hg-reagent complex were obeyed in the concentration range of 0.2-2.0 and 0.32-0.96 microg mL(-1) mercury (II) ions, respectively with a relative standard deviation in the range of 2.1+/-1.3%. The limits of detection (LOD) and quantification (LOQ) of the procedure were 0.026 and 0.086 microg mL(-1) Hg(2+), respectively. The proposed method was applied for the analysis of mercury (II) in dental-unit wastewater and fertilizer samples. The validation of the method was tested by comparison with the data obtained by the inductively coupled plasma-mass spectrometry (ICP-MS). The statistical treatment of data in terms of Student's t-tests and variance ratio f-tests has revealed no significance differences.
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Affiliation(s)
- A Hamza
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Saudi Arabia
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El-Shahawi MS, Bashammakh AS, El-Mogy T. Determination of trace levels of diosmin in a pharmaceutical preparation by adsorptive stripping voltammetry at a glassy carbon electrode. ANAL SCI 2007; 22:1351-4. [PMID: 17038775 DOI: 10.2116/analsci.22.1351] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A systematic study on the electrochemical behavior of diosmin in Britton-Robinson buffer (pH 2.0-10.0) at a glassy carbon electrode (GCE) was made. The oxidation process of the drug was found to be quasi-reversible with an adsorption-controlled step. The adsorption stripping response was evaluated with respect to various experimental conditions, such as the pH of the supporting electrolyte, the accumulation potential and the accumulation time. The observed anodic peak current at +0.73 V vs. Ag/AgCl reference electrode increased linearly over two orders of magnitude from 5.0x10(-8) M to 9.0x10(-6) M. A limit of detection down to 3.5x10(-8) M of diosmin at the GCE was achieved with a mean recovery of 97+/-2.1%. Based on the electrochemical data, an open-circuit accumulation step in a stirred sample solution of BR at pH 3.0 was developed. The proposed method was successfully applied to the determination of the drug in pharmaceutical formulations. The results compared favorably with the data obtained via spectrophotometric and HPLC methods.
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Affiliation(s)
- M S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz UniversityJeddah, Kingdom of Saudi Arabia.
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Bashammakh AS, Bahaffi SO, Al-Sibaai AA, Al-Wael HO, El-Shahawi MS. Extractive liquid–liquid spectrophotometric procedure for the determination of thiocyanate ions employing the ion pair reagent amiloride monohydrochloride. Anal Chim Acta 2007; 592:16-23. [PMID: 17499065 DOI: 10.1016/j.aca.2007.04.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [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: 01/22/2007] [Revised: 04/02/2007] [Accepted: 04/04/2007] [Indexed: 10/23/2022]
Abstract
An accurate, inexpensive and less laborious liquid-liquid extractive spectrophotometric procedure for the determination of thiocyanate ions in aqueous media has been developed. The method has been based upon the formation of a yellow colored complex ion associate of the ion-pairing reagent 1-(3, 5-diamino-6-chloropyrazinecarboxyl) guanidine hydrochloride monohydrate, namely amiloride hydrochloride, DPG+.Cl- and the thiocyanate ions in aqueous media containing HNO3 (0.5 mol L(-1)) and subsequent extraction with 4-methyl-2-pentanone. The absorption electronic spectrum of the ion associate showed one well-defined peak at lambda(max) 366 nm. The stoichiometric mole ratio of DPG+.Cl- to the thiocyanate ions is 1:1. The effective molar absorptivity (epsilon) of the ion associate at lambda(max) 366 nm is 1.1+/-0.1x10(4) L mol(-1) cm(-1). The extraction constants (K(d), K(ex), and beta) enabled a simple and convenient use of the developed binary ion associate for the extractive spectrophotometric determination of traces of thiocyanate ions in the aqueous media. Beer's law and Ringbom's plots are obeyed in the concentration range 0.05-10 and 0.1-7 microg mL(-1) of the thiocyanate ions, respectively with a relative standard deviation of +/-2.3%. The calculated lower limits of detection (LOD) and quantitation (LOQ) of the developed procedure for the thiocyanate ions were found equal to 0.02 and 0.066 microg mL(-1), respectively. The developed method has been applied for the determination of trace amounts of thiocyanate ions in tap-, waste- and natural water samples and compared successfully with the reported methods at the 95% confidence level. The proposed method was also applied successfully for the determination of thiocyanate ions in saliva samples.
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Affiliation(s)
- A S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
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