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Darwish IA, Aljaber KA, Al-Hossaini AM, Alsalhi MS. Evaluation of 4-fluoro-7-nitrobenzofurazan as a dual-function chromogenic and fluorogenic probe for tulathromycin and its innovative utility for development of two eco-friendly and high-through microwell assays for analysis of pharmaceutical formulations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 325:125079. [PMID: 39232308 DOI: 10.1016/j.saa.2024.125079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2024] [Revised: 08/18/2024] [Accepted: 08/29/2024] [Indexed: 09/06/2024]
Abstract
Tulathromycin is a triamilide antibacterial drug which has been approved for use in the European Union and the United States for the treatment and prevention of bovine respiratory diseases. The aim of this study was the development of two innovative microwell spectrometric (photometric and fluorometric) assays for determination of tulathromycin in its pharmaceutical formulations. To achieve this goal, 4-fluoro-7-nitrobenzofurazan was investigated as a dual-function chromogenic and fluorogenic probe for tulathromycin. The reaction between tulathromycin and 4-fluoro-7-nitrobenzofurazan proceeded smoothly in an alkaline medium, resulting in the formation of a colored and fluorescent product. The product displayed a maximum light absorption at 475 nm and emitted fluorescence at 545 nm when excited at 475 nm. Extensive investigations were conducted to optimize the factors affecting the tulathromycin /4-fluoro-7-nitrobenzofurazan reaction, and the optimal conditions were established. Using these optimized conditions, both microwell-based photometric and fluorometric assays were developed. The calibration curves relating the absorbance and fluorescence intensities of the reaction product with the corresponding tulathromycin concentrations were generated. The absorbance-concentration relationship was found to be linear within a tulathromycin concentration range of 10-400 µg mL-1, with a limit of quantitation of 6.2 µg mL-1. On the other hand, the fluorescence-concentration relationship was linear within a concentration range of 0.04-1.2 µg mL-1, with a limit of quantitation of 0.06 µg mL-1. Rigorous validations of both assays' procedures were performed, and both assays were successfully employed for the analysis of tulathromycin-containing pharmaceutical formulations (injections) with satisfactory accuracy and precision. The ecologically friendly assessment of both assays demonstrated their compliance with the principles of green analytical chemistry approaches. Moreover, the proposed microwell-based assays enabled the simultaneous analysis of multiple samples using small volumes, enabling high-throughput analysis. In conclusion, this study represents the first evaluation of 4-fluoro-7-nitrobenzofurazan as a probe with dual functionality for the microwell-based photometric and fluorometric analysis of tulathromycin. The developed assays serve as valuable analytical tools for ensuring the quality of tulathromycin 's pharmaceutical formulations.
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Affiliation(s)
- Ibrahim A Darwish
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
| | - Khalid A Aljaber
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Abdullah M Al-Hossaini
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Mohammed S Alsalhi
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
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Alkathiri FA, Al-Outaibi M, Darwish IA. A dual-function chromogenic and fluorogenic benzofurazan probe for plazomicin and its innovative utility for development of two microwell assays with high throughput for analysis of drug substance and pharmaceutical formulations. RSC Adv 2024; 14:27215-27226. [PMID: 39193289 PMCID: PMC11348761 DOI: 10.1039/d4ra04882b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2024] [Accepted: 08/20/2024] [Indexed: 08/29/2024] Open
Abstract
Plazomicin (PLZ) is a novel aminoglycoside which has been recently approved by The US Food and Drug Administration for the treatment of complicated urinary tract infections including acute pyelonephritis, caused by certain Enterobacteriaceae, in adult patients with limited or no options for alternative treatment. This study focuses on the development of microwell-based photometric and fluorometric assays for the quantitative determination of PLZ in its bulk drug substance and commercial pharmaceutical formulations (Zemedri® injections). Both assays utilize the dual-function chromogenic and fluorogenic properties of the 4-fluoro-7-nitrobenzofurazan (NBD-F) probe. The reaction between PLZ and NBD-F, conducted in a borate buffer at pH 8, resulted in the formation of a colored and fluorescent reaction product. The product exhibited maximum light absorption at 473 nm and emitted fluorescence at 541 nm when excited at 473 nm. Factors influencing the reaction between PLZ and NBD-F were thoroughly investigated, and optimal conditions were determined. Under the optimized reaction conditions, calibration curves were generated to establish the relationship between absorbance and fluorescence intensities of the reaction product with the corresponding PLZ concentrations. The absorbance-concentration relation was linear in a PLZ concentration range of 20-800 μg mL-1 with a limit of quantitation of 25 μg mL-1, while the fluorescence-concentration relation was linear in the concentration range of 0.05-1.5 μg mL-1 with a limit of quantitation of 0.08 μg mL-1. Both assays underwent validation and were successfully applied to the quantitation of PLZ in its bulk drug substance and pharmaceutical formulations (injections) with satisfactory accuracy and precision. The eco-friendliness/greenness assessment of the assays demonstrated that both assays comply with the requirements of green analytical chemistry approaches. Furthermore, the proposed microwell assay plates allowed for the simultaneous handling of numerous samples with micro-volumes, enabling high-throughput analysis. In conclusion, this study represents the first evaluation of NBD-F as a dual-function probe for the microwell-based photometric and fluorometric determination of PLZ. The developed assays serve as valuable analytical tools for the quality control of PLZ's bulk drug substance and pharmaceutical formulations.
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Affiliation(s)
- Fai A Alkathiri
- Department of Pharmaceutics, College of Pharmacy, King Saud University P. O. Box 2457 Riyadh 11451 Saudi Arabia falkathire@@ksu.edu.sa +966-114677200 +966-118052392
| | - Majed Al-Outaibi
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University P. O. Box 2457 Riyadh 11451 Saudi Arabia
| | - Ibrahim A Darwish
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University P. O. Box 2457 Riyadh 11451 Saudi Arabia
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Rakholiya B, Shah P, Patel Y, Patel G, Patel S, Patel A. A Review on Analytical Methods for Tigecycline Estimation From Its Bulk and Dosage Form. J AOAC Int 2023; 106:1689-1695. [PMID: 37676830 DOI: 10.1093/jaoacint/qsad099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 05/20/2023] [Accepted: 08/28/2023] [Indexed: 09/09/2023]
Abstract
BACKGROUND Tigecycline (TIG) is a third-generation glycylcycline derivative used as an antimicrobial and anticancer agent for the past few years. Its intricate structure makes it more vulnerable toward degradation under the influence of various environmental factors and leads to the generation of impurities. Due to its stability issues, TIG is available as a lyophilized powder for injection. The analysis of TIG becomes a cumbersome task for analysts due to its instability in solution form. As TIG works as a life-saving drug, it is important to review its analytical methods for its quality control. OBJECTIVE The present review discusses various analytical methodologies for determining TIG from its bulk, lyophilized powder, pharmacopoeial methods and factors responsible for its instability. METHODS The present review represents the analysis of data reported in the literature from 1999-2022 for the analysis of TIG. RESULTS Numerous alternative analytical techniques such as UV-visible spectrophotometry, spectrofluorimetric methods, RP-HPLC (reversed-phase high-performance liquid chromatography) and FT-IR (Fourier transform infrared), and electrophoresis has been reported for quantification, identification, and characterization of TIG. CONCLUSIONS Several analytical techniques are available to be used as a quality control tool for tigecycline, including HPLC without derivatization, whereas the fluorescence technique requires derivatization using acidic dye. A few methods require tedious pre-sample preparation techniques, become time-consuming, and involve using one or more organic solvents; there is a need to develop eco-friendlier methods for analyzing tigecycline. HIGHLIGHTS Various analytical methods such as spectrometric, fluorimetric and chromatographic methods have been discussed for estimation of TIG from its bulk and different dosage form.
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Affiliation(s)
- Bansi Rakholiya
- Charotar University of Science and Technology, Department of Pharmaceutical Chemistry and Analysis, Ramanbhai Patel College of Pharmacy, CHARUSAT Campus, Changa, Petlad, Anand, Gujarat 388 421, India
| | - Priyangi Shah
- Charotar University of Science and Technology, Department of Pharmaceutical Chemistry and Analysis, Ramanbhai Patel College of Pharmacy, CHARUSAT Campus, Changa, Petlad, Anand, Gujarat 388 421, India
| | - Yash Patel
- Charotar University of Science and Technology, Department of Pharmaceutical Chemistry and Analysis, Ramanbhai Patel College of Pharmacy, CHARUSAT Campus, Changa, Petlad, Anand, Gujarat 388 421, India
| | - Gayatri Patel
- Charotar University of Science and Technology, Department of Pharmaceutical Technology, Ramanbhai Patel College of Pharmacy, CHARUSAT Campus, Changa, Petlad, Anand, Gujarat 388 421, India
| | - Samir Patel
- Charotar University of Science and Technology, Department of Pharmaceutical Chemistry and Analysis, Ramanbhai Patel College of Pharmacy, CHARUSAT Campus, Changa, Petlad, Anand, Gujarat 388 421, India
| | - Archita Patel
- Charotar University of Science and Technology, Department of Pharmaceutical Chemistry and Analysis, Ramanbhai Patel College of Pharmacy, CHARUSAT Campus, Changa, Petlad, Anand, Gujarat 388 421, India
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Xiong Z, Zeng D, Shen S, Han Z. The Investigation on Nosocomial Infection of Acinetobacter baumannii and the Clinical Analysis of Sequential Therapy of Cefoperazone/Sulbactam Sodium for Intracranial Infection. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:4525892. [PMID: 36017154 PMCID: PMC9398857 DOI: 10.1155/2022/4525892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/04/2022] [Accepted: 07/11/2022] [Indexed: 11/17/2022]
Abstract
Background Intracranial infection is a serious complication after neurosurgery. According to a survey, the incidence of intracranial infection is about 2.2%-2.6%, and patients with severe symptoms may even pose a threat to their life safety. Objective To explore the risk factors for intracranial infection caused by Acinetobacter baumannii after surgery and the clinical effect of sequential therapy of cefoperazone/sulbactam sodium. Methods In this study, a retrospective study was used. In this case-control study, 48 cases of intracranial Acinetobacter baumannii infection after neurosurgery in our hospital from January 2016 to December 2021 were selected as the infection group, and 96 patients without intracranial infection after surgery during the same period were selected as the control group to study all kinds of related factors and analyze the risk factors for intracranial Acinetobacter baumannii infection; in addition, in accordance with the therapeutic regimen for anti-infection, the infection group was divided into the tigecycline group (patients with tigecycline therapy in this group) and the combined group (patients with tigecycline combined with cefoperazone/sulbactam sequential therapy), with 24 cases in each group in order to compare the therapeutic effects of the two groups. Results Logistic regression factor model results show that increasing age of patients, surgical treatment for intracranial tumor or craniocerebral trauma, postoperative drainage time (≥3 days), and postoperative hospital stay (≥10 days) were the risk factors for postoperative intracranial infection of Acinetobacter baumannii in neurosurgical patients (P < 0.05), and postoperative prophylactic antibiotic treatment can reduce the incidence of intracranial infection (P < 0.05). The cerebrospinal fluid nucleated cell count, serum CRP, and serum PCT in the combined group 72 h after treatment were lower than those in the tigecycline group, and the difference was statistically significant (P < 0.05). Compared with the clinical efficacy after 72-hour treatment, the cure rate and effective rate in the combined treatment group were 83.33% and 16.67%, respectively, and those in the tigecycline group were 54.17% and 33.33%, respectively. The invalid interest rate was 12.50%, and the combined treatment group was superior to the tigecycline group (P < 0.05). Conclusion For patients with craniocerebral surgery, targeted preventive interventions should be carried out for the risk factors that may lead to intracranial Acinetobacter baumannii infection. The clinical effect of tigecycline combined with cefoperazone and sulbactam sodium sequentially in the treatment of intracranial Acinetobacter baumannii infection is better.
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Affiliation(s)
- Zezhong Xiong
- Intensive Care Unit Part 1, Qinzhou Second People's Hospital, Guangxi, Qinzhou 535000, China
| | - Defu Zeng
- Intensive Care Unit Part 1, Qinzhou Second People's Hospital, Guangxi, Qinzhou 535000, China
| | - Shilong Shen
- Intensive Care Unit Part 1, Qinzhou Second People's Hospital, Guangxi, Qinzhou 535000, China
| | - Zhibang Han
- Intensive Care Unit Part 1, Qinzhou Second People's Hospital, Guangxi, Qinzhou 535000, China
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Salman BI, Hassan AI, Hassan YF, Saraya RE. Ultra-sensitive and selective fluorescence approach for estimation of elagolix in real human plasma and content uniformity using boron-doped carbon quantum dots. BMC Chem 2022; 16:58. [PMID: 35922841 PMCID: PMC9351230 DOI: 10.1186/s13065-022-00849-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 07/19/2022] [Indexed: 11/10/2022] Open
Abstract
Elagolix (ELX) is an orally administered non-peptidic GnRH antagonist that has been approved by the Food and Drug Administration in 2018 for the treatment of endometriosis pain. A sensitive and selective method for estimating elagolix (ELX) in human plasma and content uniformity was developed and validated. The spectrofluorimetric technique was used to investigate ELX utilizing boron-doped carbon quantum dots (B@CQDs). After gradually adding ELX, the quantum dots fluorescence was enhanced with LOQ of 1.74 ng mL−1, the calibration curve between ELX and corresponding fluorescence intensity was found over a range of 4–100 ng mL−1. The method was successfully applied in real human plasma with pharmacokinetic study and content uniformity test. The pharmacokinetic parameters as Cmax were found to be 570 ± 5.32 ng. mL−1 after 1 h, t1/2 was found to be 6.50 h, and AUC was found to be 1290 ± 30.33 ng. h. mL−1. B@CQDs were characterized using variety of instruments. The strategy is simple to implement in clinical labs and therapeutic drug monitoring systems.
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Affiliation(s)
- Baher I Salman
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assiut, 71524, Egypt.
| | - Ahmed I Hassan
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assiut, 71524, Egypt
| | - Yasser F Hassan
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assiut, 71524, Egypt
| | - Roshdy E Saraya
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Port Said University, Port Said, 42511, Egypt
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El-Shafie AS, Yousef A, El-Azazy M. Application of Plackett–Burman Design for Spectrochemical Determination of the Last-Resort Antibiotic, Tigecycline, in Pure Form and in Pharmaceuticals: Investigation of Thermodynamics and Kinetics. Pharmaceuticals (Basel) 2022; 15:ph15070888. [PMID: 35890186 PMCID: PMC9320474 DOI: 10.3390/ph15070888] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/08/2022] [Accepted: 07/14/2022] [Indexed: 02/01/2023] Open
Abstract
Tigecycline (TIGC) reacts with 7,7,8,8-tetracyanoquinodimethane (TCNQ) to form a bright green charge transfer complex (CTC). The spectrum of the CTC showed multiple charge transfer bands with a major peak at 843 nm. The Plackett–Burman design (PBD) was used to investigate the process variables with the objective being set to obtaining the maximum absorbance and thus sensitivity. Four variables, three of which were numerical (temperature—Temp; reagent volume—RV; reaction time—RT) and one non-numerical (diluting solvent—DS), were studied. The maximum absorbance was achieved using a factorial blend of Temp: 25 °C, RV: 0.50 mL, RT: 60 min, and acetonitrile (ACN) as a DS. The molecular composition that was investigated using Job’s method showed a 1:1 CTC. The method’s validation was performed following the International Conference of Harmonization (ICH) guidelines. The linearity was achieved over a range of 0.5–10 µg mL−1 with the limits of detection (LOD) and quantification (LOQ) of 166 and 504 ng mL−1, respectively. The method was applicable to TIGC per se and in formulations without interferences from common additives. The application of the Benesi–Hildebrand equation revealed the formation of a stable complex with a standard Gibbs free energy change (∆G°) value of −26.42 to −27.95 kJ/mol. A study of the reaction kinetics revealed that the CTC formation could be best described using a pseudo-first-order reaction.
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Salman BI, Saraya RE. Bio-analytically fluorimetric method for estimation of ertapenem in real human plasma and commercial samples; Application to pharmacokinetics study. LUMINESCENCE 2022; 37:796-802. [PMID: 35274447 DOI: 10.1002/bio.4223] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/28/2022] [Accepted: 03/02/2022] [Indexed: 11/07/2022]
Abstract
Ertapenem (EPM) is recently approved via FDA as antimicrobial drug. EPM has a broad spectrum against different bacterial strains and most common prescribed in Egypt for treatment klebsiella pneumonia. In this study, EPM was estimated using sensitive and selective spectrofluorimetric method in human plasma and pharmaceutical vial. The measured fluorescence (at 540 nm) obtained from reaction of EPM with 0.05 % w/v NBD-Cl (benzofurazan) using 0.1 M borate buffer pH 8.8 after excitation at 460 nm. The fluorometric linear range is stabilized from 10 to 350 ng mL-1 . The lower limit of detection (LOD) and the lower limit of quantitation (LOQ) was found to be 2.13 and 6.47 ng mL-1 respectively. Many factors as pH, temperature and heating time and NBD-Cl concentration were optimized. The presented work was validated according to ICH guidelines and bioanalytically validated using FDA recommendations. The significant of this study and sensitivity was successfully applied in pharmacokinetic study and commercial vial in Egypt. The pharmacokinetic parameters were studied and result recorded as Cmax of EPM was found 83.60 μ mL-1 after infusion 0.5 g of Invanz® for 30 min and AUC0-ꝏ was found to be 320 ± 30.2 μ.h mL-1 .
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Affiliation(s)
- Baher I Salman
- Pharmaceutical Analytical Chemistry Department-Faculty of Pharmacy-Al-Azhar University-Assiut branch, Assiut, Egypt
| | - Roshdy E Saraya
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Port Said University, Port Said, Egypt
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Saraya RE, Hassan YF, Eltukhi WE, Salman BI. Ultra-Sensitive Fluorimetric Method for the First Estimation of Vonoprazan in Real Human Plasma and Content Uniformity Test. J Fluoresc 2022; 32:1725-1732. [PMID: 35670919 PMCID: PMC9402479 DOI: 10.1007/s10895-022-02979-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/27/2022] [Indexed: 11/26/2022]
Abstract
Vonoprazan (VON) has been approved recently via US-FDA in 2015 as the first in class of potassium competitive acid blocker group. VON is used for management of GIT ulcer, reflux esophagitis and for eradication of Helicobacter pylori. So, the first spectrofluorimetric method was developed for estimation of VON in real human plasma and content uniformity test. The fluorimetric methodology based on reaction of secondary amine group in VON with benzofurazan (0.05% w/v NBD-Cl) reagent as nucleophilic substitution reaction in alkaline medium (0.1 M borate buffer pH 8.2) to produce highly fluorescent product measure at 530 nm after excitation at 465 nm. The linear calibration range was found 15 to 200 ng mL-1 with lower limit of quantitation (LOQ) equal to 8.57 ng mL-1. The method was successfully applied for estimation of VON in pharmacokinetic (PK) and content uniformity studies. The maximum plasma concentration was found to be (Cmax) 71.03 ng mL-1 after maximum time (tmax) equal to 1.5 ± 0.15 h. The presented strategy also applied to ensure concentration of drug in each tablet using content uniformity test with high percent of recovery 100.05 ± 0.66. The proposed method was established for clinical laboratories and therapeutic drug monitoring studies.
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Affiliation(s)
- Roshdy E. Saraya
- grid.440879.60000 0004 0578 4430Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Port Said University, Port Said, 42511 Egypt
| | - Yasser F. Hassan
- grid.411303.40000 0001 2155 6022Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University-Assiut Branch, Assiut, 71524 Egypt
| | - Walid E. Eltukhi
- grid.411303.40000 0001 2155 6022Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University-Assiut Branch, Assiut, 71524 Egypt
| | - Baher I. Salman
- grid.411303.40000 0001 2155 6022Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University-Assiut Branch, Assiut, 71524 Egypt
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Mendes SS, Miranda V, Saraiva LM. Hydrogen Sulfide and Carbon Monoxide Tolerance in Bacteria. Antioxidants (Basel) 2021; 10:729. [PMID: 34063102 PMCID: PMC8148161 DOI: 10.3390/antiox10050729] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/26/2021] [Accepted: 05/03/2021] [Indexed: 12/27/2022] Open
Abstract
Hydrogen sulfide and carbon monoxide share the ability to be beneficial or harmful molecules depending on the concentrations to which organisms are exposed. Interestingly, humans and some bacteria produce small amounts of these compounds. Since several publications have summarized the recent knowledge of its effects in humans, here we have chosen to focus on the role of H2S and CO on microbial physiology. We briefly review the current knowledge on how bacteria produce and use H2S and CO. We address their potential antimicrobial properties when used at higher concentrations, and describe how microbial systems detect and survive toxic levels of H2S and CO. Finally, we highlight their antimicrobial properties against human pathogens when endogenously produced by the host and when released by external chemical donors.
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Lu Q, Xu X, Song S, Wu A, Liu L, Kuang H, Xu C. Development of a monoclonal antibody-based immunochromatographic strip for the rapid detection of tigecycline in human serum. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:817-824. [PMID: 33502396 DOI: 10.1039/d0ay02182b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this study, a gold labelled immunochromatographic assay was developed to detect tigecycline (TGC) in human serum. For this purpose, an anti-TGC monoclonal antibody, 2G7, was produced and characterized, and was found to have a 50%-inhibitory concentration (IC50) of 2.303 ng mL-1 and a limit of detection (LOD) of 0.215 ng mL-1 for TGC. This strip assay had a visual limit of detection (vLOD) of 50 ng mL-1 and a cut-off value of 1000 ng mL-1 for TGC in human serum, when assessed by eye. With the aid of a strip scan reader, a quantitative determination of TGC was obtained with a calculated limit of detection (cLOD) of 15.03 ng mL-1. Analysis of TGC in human serum indicated that the results of our strip assay compared well with results obtained using ic-ELISA and LC-MS/MS. Therefore, this strip assay represents a sensitive and reliable method for the on-site detection of TGC in serum samples.
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Affiliation(s)
- Qianqian Lu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Xinxin Xu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Shanshan Song
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Aihong Wu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Liqiang Liu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Hua Kuang
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Chuanlai Xu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
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Hussein SA, Salman BI, Ali MFB, Marzouq MA. Development of sensitive benzofurazan-based spectrometric methods for analysis of spectinomycin in vials and human biological samples. LUMINESCENCE 2019; 34:895-902. [PMID: 31379072 DOI: 10.1002/bio.3688] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 06/25/2019] [Accepted: 07/02/2019] [Indexed: 11/12/2022]
Abstract
Spectinomycin hydrochloride (SPEC) is an aminoglycoside antibiotic that has a broad spectrum against several bacterial strains of humans and veterinary infections. However, SPEC lacks a fluorophore or chromophore and this lack makes its analysis a challenge. Our study provides a simple, sensitive and low-cost spectrofluorimetric/spectrophotometric method based on the reaction between secondary amine groups and a benzofurazan reagent using borate buffer (pH 9.2). The yielding compound was measured fluorimetrically at 530 nm (excitation at 460 nm) with colorimetry at 410 nm. The calibration curves ranged from 30 to 400 ng ml-1 and from 0.2 to 6 μg ml-1 for spectrofluorimetric and spectrophotometric analyses, respectively. The limits of detection were calculated to be 4.15 ng ml-1 and 0.05 μg ml-1 for spectrofluorimetric and spectrophotometric processes, respectively. The ultra-affectability and high selectivity of the proposed method permitted analysis of SPEC in the dosage form and in human plasma samples, with good recoveries of about 101.19 and 97.11%, respectively, without any matrix interference. The proposed strategy was validated using International Conference on Harmonization standards and validated bioanalytically using USFDA recommendations.
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Affiliation(s)
- Samiha A Hussein
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Baher I Salman
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut branch, Assiut, Egypt
| | - Marwa F B Ali
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Mostafa A Marzouq
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut branch, Assiut, Egypt
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