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Kujur AB, Satnami ML, Chawre Y, Miri P, Sinha A, Nagwanshi R, Karbhal I, Ghosh KK, Pervez S, Deb MK. Inner-filter effect of nitrogen-doped carbon quantum dots-MnO 2 nanotubes for smartphone-integrated dual-mode sensing of glutathione and captopril. RSC Adv 2024; 14:20093-20104. [PMID: 38915329 PMCID: PMC11194709 DOI: 10.1039/d4ra03287j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Accepted: 06/15/2024] [Indexed: 06/26/2024] Open
Abstract
Nitrogen-doped carbon quantum dots (N-CQDs) exhibit unique fluorescence properties and are considered one of the best candidates for the development of fluorescence-based sensors for the detection of many analytes. In this work, a smartphone-assisted fluorescent sensor has been developed using N-CQDs and MnO2 nanotubes (MnO2 NTs) for the detection of glutathione (GSH) and captopril (CAP). N-CQDs were facilely synthesized via the solvothermal method, where o-phenylenediamine (o-PD) and urea were used as nitrogen precursors. Likewise, MnO2 NTs were synthesized using the hydrothermal method. Relying on the excellent fluorescence quenching ability of MnO2 NTs, a nanocomposite of N-CQDs and MnO2 NTs is prepared, wherein the fluorescence intensity of N-CQDs was effectively quenched in the presence of MnO2 NTs via the inner-filter effect (IFE). The addition of thiolated compounds (GSH and CAP) helped in the recovery of the fluorescence of N-CQDs by triggering the redox reaction and decomposing the MnO2 NTs. An investigation of fluorescence along with smartphone-based studies by evaluating the gray measurement using Image J software showed a great response towards GSH and CAP providing LODs of 4.70 μM and 5.22 μM (fluorometrically) and 5.76 μM and 2.81 μM (smartphone-based), respectively. The practical applicability of the sensing system has been verified using human blood plasma samples.
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Affiliation(s)
- Ankita B Kujur
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Manmohan L Satnami
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Yogyata Chawre
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Pinki Miri
- Department of Chemistry, Govt. Nagarjuna P. G. College of Science Raipur-492010 Chhattisgarh India
| | - Akash Sinha
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
- Department of Chemistry, Govt. Nagarjuna P. G. College of Science Raipur-492010 Chhattisgarh India
| | - Rekha Nagwanshi
- Department of Chemistry, Govt. Madhav Science P. G. College Ujjain-456010 Madhya Pradesh India
| | - Indrapal Karbhal
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Kallol K Ghosh
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Shamsh Pervez
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Manas Kanti Deb
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
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Lv Y, Zhou C, Li M, Huo Z, Wei Z, Wang N, Wang G, Su X. A dual-mode sensing system based on carbon quantum dots and Fe nanozymes for the detection of α-glucosidase and its inhibitors. Talanta 2024; 268:125328. [PMID: 37890370 DOI: 10.1016/j.talanta.2023.125328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/15/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023]
Abstract
In this research, a sensitive fluorometric and colorimetric dual-mode sensing platform based on nitrogen-doped carbon quantum dots (NCDs) and magnetic Fe nanoparticles with peroxidase-like activity (Fe nanozymes, Fe NZs) was established, and was further applied for the detection of α-glucosidase (α-glu) and its inhibitors. The ⋅OH that produced by H2O2 catalyzed by Fe NZs can oxidize the colorless diammonium 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) to green oxABTS, and a noticeable absorption peak at 417 nm appeared. Simultaneously, oxABTS can quench the fluorescence of NCDs at 402 nm via fluorescence resonance energy transfer (FRET). 2-O-α-D-glucopyranosyl-L-ascorbic acid (AAG) can be decomposed by α-glu to glucose and ascorbic acid (AA), AA can prevent the oxidation of ABTS, resulting in the absorption at 417 nm decreased. Moreover, the quenching effect of oxABTS on NCDs is weakened, and the fluorescence at 402 nm is restored. Therefore, based on the change of absorption at 417 nm and fluorescence at 402 nm, the fluorometric and colorimetric dual-mode sensing method can be used for the determination of acarbose and voglibose that are the inhibitors of α-glu.
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Affiliation(s)
- Yuntai Lv
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Chenyu Zhou
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Meini Li
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Zejiao Huo
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Zhiyuan Wei
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Nan Wang
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Guannan Wang
- School of Pharmacy, Shenyang Medical University, Shenyang,110034, China.
| | - Xingguang Su
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China.
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Abdel-Megied AM, Kovalenko S, Elbarbry FA, Piponski M, Oleshchuk O, El Deeb S, Magdy G, Belal F, Grochovuy T, Logoyda L. LC-MS/MS bioanalytical method for the quantitative analysis of nifedipine, bisoprolol, and captopril in human plasma: Application to pharmacokinetic studies. Biomed Chromatogr 2023; 37:e5664. [PMID: 37114598 DOI: 10.1002/bmc.5664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 04/10/2023] [Accepted: 04/23/2023] [Indexed: 04/29/2023]
Abstract
In this study, the development and validation of an accurate and highly sensitive LC-MS/MS method were performed for the estimation of nifedipine, bisoprolol and captopril in real human plasma. Liquid-liquid extraction using tert-butyl methyl ether was efficiently applied for extraction of the analytes from plasma samples. The chromatographic separation was carried out using an isocratic elution mode on the X-terra MS C18 column (4.6 × 50 mm, 3.5 μm). The mobile phase consisted of methanol-0.1% formic acid (95:5, v/v) for determination of nifedipine and bisoprolol and acetonitrile-0.1% formic acid (70:30, v/v) for determination of captopril with a flow rate of 0.5 ml/min. Acceptable results regarding the different validation characteristics of the analytes were obtained in accordance with US Food and Drug Administration recommendations for bioanalytical methods. The developed approach was linear over concentration ranges of 0.5-130.0, 50.0-4,500.0 and 0.3-30.0 ng/ml for nifedipine, captopril and bisoprolol, respectively. The method revealed a sufficient lower limit of quantification in the range of 0.3-50.0 ng/ml, as well as high recovery percentages, indicating high bioanalytical applicability. The proposed method was efficiently applied to a pharmacokinetic evaluation of a fixed-dose combination of the analytes in healthy male volunteers.
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Affiliation(s)
- Ahmed M Abdel-Megied
- Department of Pharmaceutical Sciences, Notre Dame of Maryland University, School of Pharmacy, Baltimore, Maryland, USA
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, Egypt
| | | | - Fawzy A Elbarbry
- School of Pharmacy, Pacific University Oregon, Hillsboro, Oregon, USA
| | - Marjan Piponski
- Quality Control Department, Replek Farm Ltd., Skopje, Republic of North Macedonia
| | - Oleksandra Oleshchuk
- Department of Pharmacology and Clinical Pharmacology, I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Galal Magdy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Fathalla Belal
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Taras Grochovuy
- Department of Pharmacy Management, Economics and Technology, I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Liliya Logoyda
- Department of Pharmaceutical Chemistry, I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
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Anju SM, Aswathy AO, Varghese S, Abraham MK, Lekshmi RS, Ibrahim Shkhair A, Lekha GM, Syamchand SS, George S. Folic acid incorporated nitrogen-doped carbon dots as a turn-on fluorescence probe for homocysteine detection. LUMINESCENCE 2023; 38:19-27. [PMID: 36394200 DOI: 10.1002/bio.4411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 09/18/2022] [Accepted: 10/20/2022] [Indexed: 11/19/2022]
Abstract
This study describes the development of a low-cost fluorescence assay for detecting homocysteine (Hcy) without the interference of cysteine and glutathione using carbon quantum dots. Herein nitrogen-doped carbon quantum dots (NCDs) were synthesized from citric acid as the carbon source and urea as the dopant using a one-pot microwave-assisted method. The obtained NCDs were incorporated with folic acid (FA) by the direct ex situ addition method and were used as a fluorescence probe to detect Hcy. The probe exhibited a fluorescence turn-on response with increased Hcy concentration up to 50 μM with a limit of detection of 2.276 μM. The point of care detection of Hcy using the probe was also tested with a paper-based assay strip.
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Affiliation(s)
- Saralammma Madanan Anju
- Department of Chemistry, School of Physical and Mathematical Science, University of Kerala, Thiruvananthapuram, Kerala, India
| | - Asokan Omana Aswathy
- Department of Chemistry, School of Physical and Mathematical Science, University of Kerala, Thiruvananthapuram, Kerala, India
| | - Susan Varghese
- Department of Chemistry, School of Physical and Mathematical Science, University of Kerala, Thiruvananthapuram, Kerala, India
| | - Merin Kodinattumkunnel Abraham
- Department of Chemistry, School of Physical and Mathematical Science, University of Kerala, Thiruvananthapuram, Kerala, India
| | - Ragini Sanjeevan Lekshmi
- Department of Chemistry, School of Physical and Mathematical Science, University of Kerala, Thiruvananthapuram, Kerala, India
| | - Ali Ibrahim Shkhair
- Department of Chemistry, School of Physical and Mathematical Science, University of Kerala, Thiruvananthapuram, Kerala, India
| | - Girija Muraleedharan Lekha
- Department of Chemistry, School of Physical and Mathematical Science, University of Kerala, Thiruvananthapuram, Kerala, India
| | | | - Sony George
- Department of Chemistry, School of Physical and Mathematical Science, University of Kerala, Thiruvananthapuram, Kerala, India
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Designing three digital logic circuits based on two-component molecular systems of a combination of BSA and N, N′-bis(salicylidene) - ethylenediamine. Chem Phys Lett 2023. [DOI: 10.1016/j.cplett.2022.140238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Colorimetric Analysis of Captopril on the Basis of Its Free Radical Scavenger Character with Carbon Nanozymes as Catalyst. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-022-07489-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Design of graphene quantum dots decorated MnO2 nanosheet based fluorescence turn “On-Off-On” nanoprobe for highly sensitive detection of lactoferrin. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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