1
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Salmani-Zarchi H, Borghei YS, Nikkhah M. A turn-off fluorimetric -aptasensor for early detection of apoptosis inside the cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 300:122933. [PMID: 37267835 DOI: 10.1016/j.saa.2023.122933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/05/2023] [Accepted: 05/27/2023] [Indexed: 06/04/2023]
Abstract
To detect cytochrome c (Cyt c) as an important biomarker of apoptosis inside the cells, a simple, label-free, fluorometric detection method has been presented. For this purpose, an aptamer/gold nanocluster probe (Aptamer@AuNCs) was produced which could specifically bind to Cyt c leading to fluorescence quenching of AuNCs. The developed aptasensor showed two linear ranges of 1-80 μM and 100-1000 μM and a detection limit of 0.77 μM and 297.5 μM, respectively. This platform was successfully used to assay Cyt c release inside the apoptotic cells and their cell lysate. Aptamer@AuNC due to its enzyme-like properties could replace antibodies in Cyt c detection by conventional blotting techniques.
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Affiliation(s)
- Hamed Salmani-Zarchi
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box: 14115-175, Tehran, Iran
| | - Yasaman-Sadat Borghei
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box: 14115-175, Tehran, Iran; Center for Bioscience & Technology, Institute for Convergence Science & Technology, Sharif University of Technology, Iran.
| | - Maryam Nikkhah
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box: 14115-175, Tehran, Iran; Department of Sensor and Biosensor, Faculty of Interdisciplinary Sciences and Technologies, Tarbiat Modares University, P.O. Box: 14115-336, Tehran, Iran.
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2
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Yadav S, Sawarni N, Kumari P, Sharma M. Advancement in analytical techniques fabricated for the quantitation of cytochrome c. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Du N, Zhang H, Wang J, Dong X, Li J, Wang K, Guan R. Fluorescent silicon nanoparticle–based quantitative hemin assay. Anal Bioanal Chem 2022; 414:8223-8232. [DOI: 10.1007/s00216-022-04386-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/10/2022] [Accepted: 10/13/2022] [Indexed: 11/01/2022]
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4
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Wu Y, Cao L, Zan M, Hou Z, Ge M, Dong WF, Li L. Iron and nitrogen-co-doped carbon quantum dots for the sensitive and selective detection of hematin and ferric ions and cell imaging. Analyst 2021; 146:4954-4963. [PMID: 34259240 DOI: 10.1039/d1an00828e] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iron, nitrogen-co-doped carbon quantum dots (Fe,N-CDs) were prepared via a simple one-step hydrothermal method. The quantum yield of fluorescence reached about 27.6% and the blue-emissive Fe,N-CDs had a mean size of 3.76 nm. The as-prepared carbon quantum dots showed good solubility, a high quantum yield, good biocompatibility, low cytotoxicity, and high photostability. Interestingly, the as-prepared Fe,N-CDs exhibited good selectivity and sensitivity toward both hematin and ferric ions, and the limit of detection for hematin and ferric ions was calculated to be about 0.024 μM and 0.64 μM, respectively. At the same time, Fe,N-CDs were used for imaging HeLa cells and showed that most Fe,N-CDs were detained in the lysosome. Thus, this fluorescent probe has potential application in the quantitative detection of hematin or Fe3+ in a complex environment and for determining Fe3+ at the cellular level.
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Affiliation(s)
- Yuqing Wu
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China.
| | - Lei Cao
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China. and School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Minghui Zan
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China. and State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, P. R. China
| | - Zheng Hou
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China.
| | - Mingfeng Ge
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China. and Guokeyigong Science and Technology Development Co., Ltd, Jinan 250103, China
| | - Wen-Fei Dong
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China.
| | - Li Li
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou 215163, P. R. China.
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5
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Xie R, Liu Y, Yang P, Huang L, Zou X, Liu J, Ren Q, Tao J, Zhao P. “French fries”-like luminescent metal organic frameworks for the fluorescence determination of cytochrome c released by apoptotic cells and screening of anticancer drug activity. Mikrochim Acta 2020; 187:221. [DOI: 10.1007/s00604-020-4207-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 03/02/2020] [Indexed: 01/23/2023]
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6
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He W, Huo Z, Sun X, Shen J. Facile and green synthesis of N, Cl-dual-doped carbon dots as a label-free fluorescent probe for hematin and temperature sensing. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104528] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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7
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Liang JY, Han L, Liu SG, Ju YJ, Gao X, Li NB, Luo HQ. Green fluorescent carbon quantum dots as a label-free probe for rapid and sensitive detection of hematin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 212:167-172. [PMID: 30639601 DOI: 10.1016/j.saa.2019.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 12/09/2018] [Accepted: 01/01/2019] [Indexed: 06/09/2023]
Abstract
Hematin is an oxidized form of heme, and the abnormal levels of hematin in the human body can lead to various inflammatory lesions. Hence, there is still a need to establish a rapid, sensitive and efficient method for hematin detection. Herein, the green fluorescent carbon quantum dots (CQDs) are synthesized by using L-cysteine and hydrogen peroxide as precursors. The synthesized CQDs exhibit some fascinating characters including excellent water solubility, high fluorescence quantum yield, and good stability in a broad pH range of 7.0-11.0 and high ionic strength solution. Excitingly, the fluorescence of CQDs can be rapidly and selectively quenched by hematin via the inner filter effect. Moreover, the detection of hematin by the CQDs fluorescent probe shows a good linearity in the concentration range of 0.5-30 μM with a minimum detection limit of 0.1 μM. Finally, the proposed approach is successfully applied to detect hematin in human blood samples.
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Affiliation(s)
- Jia Yu Liang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Lei Han
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Shi Gang Liu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Yan Jun Ju
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Xin Gao
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Nian Bing Li
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Hong Qun Luo
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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8
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Proton-controlled synthesis of red-emitting carbon dots and application for hematin detection in human erythrocytes. Anal Bioanal Chem 2019; 411:1159-1167. [DOI: 10.1007/s00216-018-1547-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 11/20/2018] [Accepted: 12/10/2018] [Indexed: 01/03/2023]
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9
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Tang J, Huang C, Shu J, Zheng J, Ma D, Li J, Yang R. Azoreductase and Target Simultaneously Activated Fluorescent Monitoring for Cytochrome c Release under Hypoxia. Anal Chem 2018; 90:5865-5872. [DOI: 10.1021/acs.analchem.8b00554] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Jianru Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Caixia Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Jinyong Shu
- The First People Hospital of Yueyang, Yueyang, 414000, China
| | - Jing Zheng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Dandan Ma
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Jishan Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Ronghua Yang
- School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, 410076, China
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10
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Jamshidi Moghadam S, Azadbakh A. Helix structure of the double-stranded DNA for aptameric biosensing and imaging of cytochrome c. Anal Biochem 2017; 540-541:20-29. [PMID: 29074397 DOI: 10.1016/j.ab.2017.10.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 10/01/2017] [Accepted: 10/20/2017] [Indexed: 11/29/2022]
Abstract
Here, a method is introduced for construction the aptameric biosensor for biosensing detection of cytochrome C (CYC) based on chain-shape structure of aptasensor by using highly dispersed silver nanoparticles (AgNPs) on acid-oxidized carbon nanotube (CNTs) substrate. The animated capture probe (ssDNA1) and CYC-aptamer (ssDNA2) was immobilized on AgNPs/CNTs surface by covalent amide bonds formed by the carboxyl groups on the nanotubes and the amino groups on the oligonucleotides and hybridization, respectively. In this protocol, the nucleic acids at both ends of the ssDNA1 were sequenced to be complementary (tailor-made ssDNA1). The helix structure of the double-stranded DNA was fabricated by hybridizing ssDNA2 with its complementary sequence (ssDNA1). CYC-aptamer could be forced to dissociate from the sensing interface after CYC triggered structure switching of the aptamer and ssDNA1 thus tend to form a chain-shape structure through the hybridization of the complementary sequences at both its ends. The proposed assay permitted to detect CYC in the linear range of 0.01-750 nM with a very low limit of detection (LOD) (1.66 pM). In addition, the specificity of this sensing system for the detection of CYC was also demonstrated by using albumin, fructose, myoglobin, and hemoglobin.
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Affiliation(s)
| | - Azadeh Azadbakh
- Department of Chemistry, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran.
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11
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A fluorometric aptamer based assay for cytochrome C using fluorescent graphitic carbon nitride nanosheets. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2130-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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12
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Sułkowski L, Pawełczak B, Chudzik M, Maciążek-Jurczyk M. Characteristics of the Protoporphyrin IX Binding Sites on Human Serum Albumin Using Molecular Docking. Molecules 2016; 21:molecules21111519. [PMID: 27869697 PMCID: PMC6273174 DOI: 10.3390/molecules21111519] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 10/19/2016] [Accepted: 11/02/2016] [Indexed: 12/03/2022] Open
Abstract
Human serum albumin (HSA) is the main plasma protein responsible for a distribution of drugs in the human circulatory system. The binding to HSA is one of the factors that determines both the pharmacological actions and the side effects of drugs. The derivative of heme, protoporphyrin IX (PpIX), is a hydrophobic photosensitizer widely used in photodynamic diagnosis and therapy of various malignant disorders. Using absorption and fluorescence spectroscopy, it has been demonstrated that PpIX forms complexes with HSA. Its binding sites in the tertiary structure of HSA were found in the subdomains IB and IIA. PpIX binds to HSA in one class of binding sites with the association constant of 1.68 × 105 M−1 and 2.30 × 105 M−1 for an excitation at wavelength λex = 280 nm and 295 nm, respectively. The binding interactions between HSA and PpIX have been studied by means of molecular docking simulation using the CLC Drug Discovery Workbench (CLC DDWB) computer program. PpIX creates a strong ‘sandwich-type’ complex between its highly conjugated porphine system and aromatic side chains of tryptophan and tyrosine. In summary, fluorescent studies on binding interactions between HSA and PpIX have been confirmed by the results of computer simulation.
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Affiliation(s)
- Leszek Sułkowski
- Department of General and Vascular Surgery, Regional Specialist Hospital, Bialska 104/118, 42-218 Częstochowa, Poland.
| | - Bartosz Pawełczak
- Department of Physical Pharmacy, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland.
| | - Mariola Chudzik
- Department of Physical Pharmacy, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland.
| | - Małgorzata Maciążek-Jurczyk
- Department of Physical Pharmacy, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland.
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13
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A novel upconversion@polydopamine core@shell nanoparticle based aptameric biosensor for biosensing and imaging of cytochrome c inside living cells. Biosens Bioelectron 2016; 87:638-645. [PMID: 27619527 DOI: 10.1016/j.bios.2016.09.017] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/16/2016] [Accepted: 09/05/2016] [Indexed: 11/21/2022]
Abstract
Herein, a novel upconversion@polydopamine core@shell nanoparticle (termed as UCNP@PDA NP) -based aptameric biosensor has been fabricated for the quantitative analysis of cytochrome c (Cyt c) inside living cells, which comprises an UCNP@PDA NP, acting as an internal reference and fluorescence quenching agent, and Cy3 modified aptamer enabling ratiometric quantitative Cyt c measurement. After the hybridization of Cy3 labeled aptamer with amino-terminated single DNA on the UCNP@PDA NP surface (termed as UCNP@PDA@AP), the fluorescence of Cy3 can be efficiently quenched by the PDA shell. With the spontaneous cellular uptake of UCNP@PDA@AP, the Cyt c aptamer dissociates from UCNP@PDA NP surface through formation of aptamer-Cyt c complex, resulting in concomitant activation of the Cy3 fluorescence. High amount of Cyt c leads to high fluorescence emission, enabling direct visualization/measurement of the Cyt c by fluorescence microscopy/spectroscopy. The steady upconversion luminescent (UCL) signals can be employed not only for intracellular imaging, but also as an internal reference for evaluating intracellular Cyt c amount using the ratio of fluorescence intensity of Cy3 with the UCL intensity of UCNP. The UCNP@PDA@AP shows a reasonable detection limit (20nM) and large dynamic range (50nM to 10μM, which covers the literature reported values (1-10μM) for cytosolic Cyt c in apoptotic cells) for detecting Cyt c in buffer with excellent selectivity. In addition, the UCNP@PDA@AP has been successfully used to monitor etoposide induced intracellular releasing of Cyt c, providing the possibility for cell-based screening of apoptosis-inducing drugs.
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Ji L, Chen L, Wu P, Gervasio DF, Cai C. Highly Selective Fluorescence Determination of the Hematin Level in Human Erythrocytes with No Need for Separation from Bulk Hemoglobin. Anal Chem 2016; 88:3935-44. [DOI: 10.1021/acs.analchem.6b00131] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lijuan Ji
- Jiangsu
Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, National and Local Joint
Engineering Research Center of Biomedical Functional Materials, College
of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, P. R. China
| | - Li Chen
- Jiangsu
Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, National and Local Joint
Engineering Research Center of Biomedical Functional Materials, College
of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, P. R. China
| | - Ping Wu
- Jiangsu
Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, National and Local Joint
Engineering Research Center of Biomedical Functional Materials, College
of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, P. R. China
| | - Dominic F. Gervasio
- Department of Chemical & Environmental Engineering, University of Arizona, 1133 East James E. Rogers Way, Tucson, Arizona 85721, United States
| | - Chenxin Cai
- Jiangsu
Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, National and Local Joint
Engineering Research Center of Biomedical Functional Materials, College
of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210097, P. R. China
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Shamsipur M, Molaabasi F, Hosseinkhani S, Rahmati F. Detection of Early Stage Apoptotic Cells Based on Label-Free Cytochrome c Assay Using Bioconjugated Metal Nanoclusters as Fluorescent Probes. Anal Chem 2016; 88:2188-97. [DOI: 10.1021/acs.analchem.5b03824] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mojtaba Shamsipur
- Department of Chemistry, Razi University, 67149-67346, Kermanshah, Iran
| | - Fatemeh Molaabasi
- Department of Chemistry, Tarbiat Modares University, 14115-111, Tehran, Iran
| | - Saman Hosseinkhani
- Department of Biology, Tarbiat Modares University, 14115-111, Tehran, Iran
| | - Fereshteh Rahmati
- Department of Biology, Tarbiat Modares University, 14115-111, Tehran, Iran
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16
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Aich A, Freundlich M, Vekilov PG. The free heme concentration in healthy human erythrocytes. Blood Cells Mol Dis 2015; 55:402-9. [PMID: 26460266 DOI: 10.1016/j.bcmd.2015.09.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 09/16/2015] [Indexed: 01/29/2023]
Abstract
Heme, the prosthetic group of hemoglobin, may be released from its host due to an intrinsic instability of hemoglobin and accumulate in the erythrocytes. Free heme is in the form of hematin (Fe(3+) protoporphyrin IX OH) and follows several pathways of biochemical toxicity to tissues, cells, and organelles since it catalyzes the production of reactive oxygen species. To determine concentration of soluble free heme in human erythrocytes, we develop a new method. We lyse the red blood cells and isolate free heme from hemoglobin by dialysis. We use the heme to reconstitute horseradish peroxidase (HRP) from an excess of the apoenzyme and determine the HRP reaction rate from the evolution of the emitted luminescence. We find that in a population of five healthy adults the average free heme concentration in the erythrocytes is 21±2μM, ca. 100× higher than previously determined. Tests suggest that the lower previous value was due to the use of elevated concentrations of NaCl, which drive hematin precipitation and re-association with apoglobin. We show that the found hematin concentration is significantly higher than estimates based on equilibrium release and the known hematin dimerization. The factors that lead to enhanced heme release remain an open question.
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Affiliation(s)
- Anupam Aich
- Department of Chemical and Biomolecular Engineering, University of Houston, 4800 Calhoun Road, Houston, TX 77204, USA
| | - Melissa Freundlich
- Department of Chemical and Biomolecular Engineering, University of Houston, 4800 Calhoun Road, Houston, TX 77204, USA; École Nationale Supérieure de Chimie de Paris, 11, rue Pierre et Marie Curie, 75231 PARIS Cedex 05, France
| | - Peter G Vekilov
- Department of Chemical and Biomolecular Engineering, University of Houston, 4800 Calhoun Road, Houston, TX 77204, USA; Department of Chemistry, University of Houston, 4800 Calhoun Road, Houston, TX 77204, USA.
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17
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Aich A, Pan W, Vekilov PG. Thermodynamic mechanism of free heme action on sickle cell hemoglobin polymerization. AIChE J 2015. [DOI: 10.1002/aic.14800] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Anupam Aich
- Department of Chemical and Biomolecular Engineering; University of Houston; Houston TX 77204
| | - Weichun Pan
- Department of Chemical and Biomolecular Engineering; University of Houston; Houston TX 77204
| | - Peter G. Vekilov
- Department of Chemical and Biomolecular Engineering; University of Houston; Houston TX 77204
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Wang Q, Zhan G, Li C. Facile synthesis of N-acetyl-L-cysteine capped CdHgSe quantum dots and selective determination of hemoglobin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 117:198-203. [PMID: 23988537 DOI: 10.1016/j.saa.2013.08.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 07/21/2013] [Accepted: 08/02/2013] [Indexed: 06/02/2023]
Abstract
Using N-acetyl-L-cysteine (NAC) as a stabilizer, well water-dispersed, high-quality and stable CdHgSe quantum dots were facilely synthesized via a simple aqueous phase method. The as-prepared NAC capped CdHgSe quantum dots were thoroughly characterized by fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy and transmission electron microscopy. A novel method for the selective determination of hemoglobin (Hb) was developed based on fluorescence quenching of the NAC capped CdHgSe quantum dots. A number of key factors including pH value of phosphate buffer solution, quantum dots concentration, the adding sequence of reagents and reaction time that influence the analytical performance of the NAC capped CdHgSe quantum dots in Hb determination were investigated. Under the optimal experimental conditions, the change of fluorescence intensity (ΔI) was linearly proportional to the concentration of Hb in the range of 4.0×10(-9)-4.4×10(-7) mol L(-1) with a detection limit of 2.0×10(-9) mol L(-1). The developed method has been successfully employed to determine Hb in human urine samples.
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Affiliation(s)
- Qingqing Wang
- Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
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Wang H, Peng Z, Long Y, Chen H, Yang Y, Li N, Liu F. A simple and reusable fluorescent sensor for heme proteins based on a conjugated polymer-doped electrospun nanofibrous membrane. Talanta 2012; 94:216-22. [DOI: 10.1016/j.talanta.2012.03.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Accepted: 03/17/2012] [Indexed: 11/29/2022]
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