1
|
Zhang J, Xu D, Deng Z, Tan X, Guo D, Qiao Y, Li Y, Hou X, Wang S, Zhang J. Using tungsten oxide quantum-dot enhanced electrochemiluminescence to measure thrombin activity and screen its inhibitors. Talanta 2024; 267:125267. [PMID: 37801928 DOI: 10.1016/j.talanta.2023.125267] [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: 07/17/2023] [Revised: 09/27/2023] [Accepted: 10/01/2023] [Indexed: 10/08/2023]
Abstract
A thrombin-activity-based electrochemiluminescence (ECL) biosensor was successfully constructed using tungsten oxide quantum dots (WO3-x QDS) as the co-reactant and thrombin-cleavable peptides as the recognizer. Specifically, Ru(bpy)32+ were doped on silica nanoparticles (Ru@SiO2), which greatly enhanced the ECL potential. AuNPs@WO3-x QDs composite was then prepared to accelerate electron transfer and improve the ECL signal by 219 times. Under ideal conditions, the limit of detection for thrombin in serum was determined to be 0.28 μU/mL with a linear range from 1 μU/mL to 1 U/mL. In addition, the developed ECL biosensor was used to screen for thrombin inhibitors from 12 compounds in Artemisiae Argyi Folium. Among the compounds tested, it was observed that 100 μmol/L luteolin exhibited a significantly higher inhibition rate (exceeding 80%) compared to apigenin, isorhamnetin, naringin, or eriodictyol. In an in-vitro anticoagulation experiment, luteolin (100 μmol/L) prolonged APTT by 49%, and the molecular docking assay indicated that luteolin had binding sites of Gly219 and Asp189 in the active pockets of thrombin. This may have been the main reason underpinning luteolin's anticoagulation effects. Overall, the Ru@WO3-x QDS ECL biosensor provided a reliable strategy for thrombin activity assay and screening of anticoagulant agents.
Collapse
Affiliation(s)
- Jing Zhang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China; Shaanxi Engineering Research Center of Cardiovascular Drugs Screening & Analysis, Xi'an 710061, China
| | - Dan Xu
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China; Shaanxi Engineering Research Center of Cardiovascular Drugs Screening & Analysis, Xi'an 710061, China
| | - Zijie Deng
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China; Shaanxi Engineering Research Center of Cardiovascular Drugs Screening & Analysis, Xi'an 710061, China
| | - Xueping Tan
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China; Shaanxi Engineering Research Center of Cardiovascular Drugs Screening & Analysis, Xi'an 710061, China
| | - Dongnan Guo
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China; Shaanxi Engineering Research Center of Cardiovascular Drugs Screening & Analysis, Xi'an 710061, China
| | - Yanru Qiao
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China; Shaanxi Engineering Research Center of Cardiovascular Drugs Screening & Analysis, Xi'an 710061, China
| | - You Li
- Department of Peripheral Vascular Disease, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an 710061, China
| | - Xiaofang Hou
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China; Shaanxi Engineering Research Center of Cardiovascular Drugs Screening & Analysis, Xi'an 710061, China.
| | - Sicen Wang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China; Shaanxi Engineering Research Center of Cardiovascular Drugs Screening & Analysis, Xi'an 710061, China.
| | - Junbo Zhang
- Department of Peripheral Vascular Disease, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an 710061, China.
| |
Collapse
|
2
|
Skoptsova AA, Geronikaki A, Novichikhina NP, Sulimov AV, Ilin IS, Sulimov VB, Bykov GA, Podoplelova NA, Pyankov OV, Shikhaliev KS. Design, Synthesis, and Evaluation of New Hybrid Derivatives of 5,6-Dihydro-4 H-pyrrolo[3,2,1- ij]quinolin-2(1 H)-one as Potential Dual Inhibitors of Blood Coagulation Factors Xa and XIa. Molecules 2024; 29:373. [PMID: 38257286 PMCID: PMC10818416 DOI: 10.3390/molecules29020373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/29/2023] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Cardiovascular diseases caused by blood coagulation system disorders are one of the leading causes of morbidity and mortality in the world. Research shows that blood clotting factors are involved in these thrombotic processes. Among them, factor Xa occupies a key position in the blood coagulation cascade. Another coagulation factor, XIa, is also a promising target because its inhibition can suppress thrombosis with a limited contribution to normal hemostasis. In this regard, the development of dual inhibitors as new generation anticoagulants is an urgent problem. Here we report the synthesis and evaluation of novel potential dual inhibitors of coagulation factors Xa and XIa. Based on the principles of molecular design, we selected a series of compounds that combine in their structure fragments of pyrrolo[3,2,1-ij]quinolin-2-one and thiazole, connected through a hydrazine linker. The production of new hybrid molecules was carried out using a two-stage method. The reaction of 5,6-dihydropyrrolo[3,2,1-ij]quinoline-1,2-diones with thiosemicarbazide gave the corresponding hydrazinocarbothioamides. The reaction of the latter with DMAD led to the target methyl 2-(4-oxo-2-(2-(2-oxo-5,6-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1(2H)-ylidene)hydrazineyl)thiazol-5(4H)-ylidene)acetates in high yields. In vitro testing of the synthesized molecules revealed that ten of them showed high inhibition values for both the coagulation factors Xa and XIa, and the IC50 value for some compounds was also assessed. The resulting structures were also tested for their ability to inhibit thrombin.
Collapse
Affiliation(s)
- Anna A. Skoptsova
- Department of Organic Chemistry, Faculty of Chemistry, Voronezh State University, 1 Universitetskaya Sq., 394018 Voronezh, Russia; (A.A.S.); (N.P.N.)
| | - Athina Geronikaki
- School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Nadezhda P. Novichikhina
- Department of Organic Chemistry, Faculty of Chemistry, Voronezh State University, 1 Universitetskaya Sq., 394018 Voronezh, Russia; (A.A.S.); (N.P.N.)
| | - Alexey V. Sulimov
- Research Computing Center, Lomonosov Moscow State University, 119992 Moscow, Russia; (A.V.S.); (I.S.I.); (V.B.S.)
| | - Ivan S. Ilin
- Research Computing Center, Lomonosov Moscow State University, 119992 Moscow, Russia; (A.V.S.); (I.S.I.); (V.B.S.)
| | - Vladimir B. Sulimov
- Research Computing Center, Lomonosov Moscow State University, 119992 Moscow, Russia; (A.V.S.); (I.S.I.); (V.B.S.)
| | - Georgii A. Bykov
- Department of Biophysics at the Faculty of Physics, Lomonosov Moscow State University, 119992 Moscow, Russia;
| | | | - Oleg V. Pyankov
- State Research Center of Virology and Biotechnology “Vector”, 630559 Koltsovo, Russia;
| | - Khidmet S. Shikhaliev
- Department of Organic Chemistry, Faculty of Chemistry, Voronezh State University, 1 Universitetskaya Sq., 394018 Voronezh, Russia; (A.A.S.); (N.P.N.)
| |
Collapse
|
3
|
Deng Z, Tan X, Guo D, Zhang J, Xu D, Hou X, Wang S, Zhang J, Wei F, Zhang D. MXene-sensitized electrochemiluminescence sensor for thrombin activity detection and inhibitor screening. Mikrochim Acta 2023; 190:328. [PMID: 37495854 DOI: 10.1007/s00604-023-05906-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 07/07/2023] [Indexed: 07/28/2023]
Abstract
Thrombin, a crucial enzyme involved in blood coagulation and associated diseases, requires accurate detection of its activity and screening of inhibitors for clinical diagnosis and drug discovery. To address this, an electrochemiluminescence (ECL) method was developed to detect thrombin activity based on the sensitization of Ti3C2Tx MXene, which could sensitize the Ru(bpy)32+ ECL system greatly. The thrombin-cleavable substrate bio-S-G-R-P-V-L-G-C was used as recognizer to evaluate the activity of thrombin. Under the optimal conditions, the limit of detection for thrombin in serum was 83 pU/mL (S/N = 3) with a linear range from 0.1 nU/mL to 1 µU/mL. Moreover, the developed ECL biosensor was employed to screen for thrombin inhibitors from Artemisiae argyi Folium. Four potential thrombin inhibitors (isoquercitrin, nepetin, L-camphor, L-borneol) were screened out with inhibition rates beyond 50%, among which isoquercitrin had the best inhibition rate of 90.26%. Isoquercitrin and nepetin were found to be competitive inhibitors of thrombin, with [Formula: see text] values of 0.91 μM and 2.18 μM, respectively. Molecular docking results showed that these compounds could interact with the active sites of thrombin through hydrogen bonds including ASP189, SER195, GLY216, and GLY219. The electrochemical biosensor constructed provides a new idea for the detection of thrombin activity and screening of its inhibitors.
Collapse
Affiliation(s)
- Zijie Deng
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, 710061, China
- Shaanxi Engineering Research Center of Cardiovascular Drugs Screening and Analysis, Xi'an, 710061, China
| | - Xueping Tan
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, 710061, China
- Shaanxi Engineering Research Center of Cardiovascular Drugs Screening and Analysis, Xi'an, 710061, China
| | - Dongnan Guo
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, 710061, China
- Shaanxi Engineering Research Center of Cardiovascular Drugs Screening and Analysis, Xi'an, 710061, China
| | - Jing Zhang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, 710061, China
- Shaanxi Engineering Research Center of Cardiovascular Drugs Screening and Analysis, Xi'an, 710061, China
| | - Dan Xu
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, 710061, China
- Shaanxi Engineering Research Center of Cardiovascular Drugs Screening and Analysis, Xi'an, 710061, China
| | - Xiaofang Hou
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, 710061, China.
- Shaanxi Engineering Research Center of Cardiovascular Drugs Screening and Analysis, Xi'an, 710061, China.
| | - Sicen Wang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, 710061, China.
- Shaanxi Engineering Research Center of Cardiovascular Drugs Screening and Analysis, Xi'an, 710061, China.
| | - Junbo Zhang
- Department of Peripheral Vascular Disease, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, 277 Yanta West Road, Xi'an, 710061, China.
| | - Fen Wei
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, 710061, China
- Shaanxi Engineering Research Center of Cardiovascular Drugs Screening and Analysis, Xi'an, 710061, China
| | - Dongdong Zhang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, 710061, China
- Shaanxi Engineering Research Center of Cardiovascular Drugs Screening and Analysis, Xi'an, 710061, China
| |
Collapse
|
4
|
Li R, Zou X, Luan P, Liu X, Wang N, Wang Q, Guan H, Xu Z. Direct Determination of Enzymes in Dried Blood Spots by High-Performance Liquid Chromatography – Mass Spectrometry (HPLC-MS) for the Screening of Antithrombotic Agents. ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2053700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Ru Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Qingdao National Laboratory for Marine Science and Technology, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao, China
| | - Xuan Zou
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Qingdao National Laboratory for Marine Science and Technology, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao, China
| | - Pan Luan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Qingdao National Laboratory for Marine Science and Technology, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao, China
| | - Xiaokun Liu
- Marine Biomedical Research Institute of Qingdao, Qingdao, China
| | - Ning Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Qingdao National Laboratory for Marine Science and Technology, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao, China
| | - Qian Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Qingdao National Laboratory for Marine Science and Technology, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao, China
| | - Huashi Guan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Qingdao National Laboratory for Marine Science and Technology, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao, China
- Marine Biomedical Research Institute of Qingdao, Qingdao, China
| | - Zhe Xu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycoengineering, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Qingdao National Laboratory for Marine Science and Technology, Innovation Center for Marine Drugs Screening and Evaluation, Qingdao, China
- Marine Biomedical Research Institute of Qingdao, Qingdao, China
| |
Collapse
|
5
|
Huang Q, Tang J, Chai X, Ren W, Wang J, Gan Q, Shi J, Wang M, Yang S, Liu J, Ma L. Affinity ultrafiltration and UPLC-HR-Orbitrap-MS based screening of thrombin-targeted small molecules with anticoagulation activity from Poecilobdella manillensis. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1178:122822. [PMID: 34147951 DOI: 10.1016/j.jchromb.2021.122822] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 05/06/2021] [Accepted: 05/31/2021] [Indexed: 01/19/2023]
Abstract
This study aims to screen potential anticoagulant components from leeches, a representative animal-sourced traditional Chinese medicine using thrombin (THR)-targeted ultrafiltration combined with ultrahigh performance liquid chromatography and high-resolution Orbitrap mass spectrometry (UPLC-HR-Orbitrap-MS). As a result, five small molecules in leech extract were discovered to interact with THR for the first time. Among them, two new compounds were isolated and their structures were identified by IR, HR-MS and NMR data. Furthermore, their THR inhibitory activity was confirmed with IC50 values of 4.74 and 8.31 μM, respectively. In addition, molecular docking analysis showed that the active (catalytic) site of THR might be the possible binding site of the two hits. Finally, reverse screening analysis indicated that LTA4-H, ACE and ALOX5AP were potential anticoagulant targets of the two new compounds. This study will broaden our understanding of the medicinal substance basis in leeches and further contribute to the discovery and development of clinical anticoagulant drugs from leeches.
Collapse
Affiliation(s)
- Qiuyang Huang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China
| | - Jianyuan Tang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, China
| | - Xiaoxin Chai
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China
| | - Wei Ren
- Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou 646000, China
| | - JiaBo Wang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China
| | - Qichao Gan
- Chongqing Duoputai Pharmaceutical Co., Ltd, Chongqing 400800, China
| | - Jingyan Shi
- Chongqing Duoputai Pharmaceutical Co., Ltd, Chongqing 400800, China
| | - Manyuan Wang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China
| | - Sijin Yang
- Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou 646000, China
| | - Jingfang Liu
- Public Technology Service Center, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Li Ma
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China.
| |
Collapse
|
6
|
Ge X, Sun C, Feng Y, Wang L, Peng J, Che Q, Gu Q, Zhu T, Li D, Zhang G. Anthraquinone Derivatives from a Marine-Derived Fungus Sporendonema casei HDN16-802. Mar Drugs 2019; 17:md17060334. [PMID: 31167439 PMCID: PMC6627905 DOI: 10.3390/md17060334] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 01/02/2023] Open
Abstract
Five new anthraquinone derivatives, auxarthrols D-H (1-5), along with two known analogues (6-7), were obtained from the culture of the marine-derived fungus Sporendonema casei. Their structures, including absolute configurations, were established on the basis of NMR, HRESIMS, and circular dichroism (CD) spectroscopic techniques. Among them, compound 4 represents the second isolated anthraquinone derivative with a chlorine atom, which, with compound 6, are the first reported anthraquinone derivatives with anticoagulant activity. Compounds 1 and 3 showed cytotoxic activities with IC50 values from 4.5 μM to 22.9 μM, while compounds 1, 3-4, and 6-7 showed promising antibacterial activities with MIC values from 12.5 μM to 200 μM. In addition, compound 7 was discovered to display potential antitubercular activity for the first time.
Collapse
Affiliation(s)
- Xueping Ge
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Chunxiao Sun
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Yanyan Feng
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Lingzhi Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Jixing Peng
- Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China.
| | - Qian Che
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Qianqun Gu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Tianjiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
| | - Guojian Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
| |
Collapse
|
7
|
Seidl C, Vilela AFL, Lima JM, Leme GM, Cardoso CL. A novel on-flow mass spectrometry-based dual enzyme assay. Anal Chim Acta 2019; 1072:81-86. [PMID: 31146868 DOI: 10.1016/j.aca.2019.04.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/28/2019] [Accepted: 04/25/2019] [Indexed: 11/16/2022]
Abstract
This work describes a new simultaneous on-flow dual parallel enzyme assay based on immobilized enzyme reactors (ICERs) with mass spectrometry detection. The novelty of this work relies on the fact that two different enzymes can be screened at the same time with only one single sample injection and in less than 6 min. The system consisted of two immobilized capillary enzyme reactors (ICERs). More specifically, the ICERs comprised two different enzymes that were accommodated in parallel and were placed between a liquid chromatography (LC) system and a mass spectrometer (MS). The resulting system could be adapted to other types of enzyme reactors with different supports. All the elements in the system were interfaced by means of two 10-port/two-position switching valves. Different tubing dimensions allowed us to monitor the activity of each enzyme independently during the same analysis. Acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) bioreactors were chosen as proof of concept. Acetylcholine (ACh) was used as substrate; the area of its protonated enzymatic hydrolysis product ion, choline, [M+H]+m/z 104.0, was monitored in the presence and absence of the standard cholinesterase inhibitor galantamine. This method proved to be an interesting tool for fast, simultaneous, and independent label-free dual enzyme inhibitor assay.
Collapse
Affiliation(s)
- Claudia Seidl
- Departamento de Química, Grupo de Cromatografia de Bioafinidade e Produtos Naturais, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 14040-90, Brazil
| | - Adriana Ferreira Lopes Vilela
- Departamento de Química, Grupo de Cromatografia de Bioafinidade e Produtos Naturais, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 14040-90, Brazil
| | - Juliana Maria Lima
- Departamento de Química, Grupo de Cromatografia de Bioafinidade e Produtos Naturais, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 14040-90, Brazil
| | - Gabriel Mazzi Leme
- SEPARARE Núcleo de Pesquisa Em Cromatografia, Departamento de Química, Universidade Federal de São Carlos, Caixa Postal 676, São Carlos, 13565-905, Brazil
| | - Carmen Lúcia Cardoso
- Departamento de Química, Grupo de Cromatografia de Bioafinidade e Produtos Naturais, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 14040-90, Brazil.
| |
Collapse
|
8
|
Tao M, Zhang L, Guo Y. Dual-Channel Enzymatic Inhibition Measurement (DEIM) Coupling Isotope Substrate via Matrix-Assisted Laser Desorption/Ionization Time of Flight Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:2427-2435. [PMID: 30159674 DOI: 10.1007/s13361-018-2054-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 07/20/2018] [Accepted: 08/04/2018] [Indexed: 06/08/2023]
Abstract
A novel dual-channel enzymatic inhibition measurement (DEIM) method was developed to improve the repeatability with light/heavy isotope substrates, producing reliable relative standard deviations (< 3%) by employing acetylcholinesterase (AChE) as the model enzyme. The matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) was adapted for enzyme-inhibited method due to its good salt-tolerance and high throughput; meanwhile, dual-channel enzymatic reactions were performed to improve the repeatability of each well. The acetylcholinesterase inhibition measurement was conducted by mixing the quenched enzyme reaction solution of blank group (with heavy isotope as substrate) and experimental group (with light isotope as substrate), of which the inhibition rate might be affected by isotope effects. Hence, inverse study and Km measurement were implemented to validate the method. The inverse study shows similar inhibition rate (68.9 and 70.3%) and the Km of isotope substrates are analogous (0.139 and 0.135 mM), which demonstrated that the novel method is feasible to AChE inhibition measurement. Finally, the method was applied to herb extracts, half of which exhibit inhibition to AChE. The precise dual-channel enzymatic inhibition measurement (DEIM) method could be regarded as a promising approach to potential enzyme inhibitor screening. Graphical Abstract ᅟ.
Collapse
Affiliation(s)
- Min Tao
- State Key Laboratory of Organometallic Chemistry and National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, People's Republic of China
- Postdoctoral Programme, Mayinglong Pharmaceutical Group Co. Ltd., Wuhan, People's Republic of China
| | - Li Zhang
- State Key Laboratory of Organometallic Chemistry and National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, People's Republic of China.
| | - Yinlong Guo
- State Key Laboratory of Organometallic Chemistry and National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, People's Republic of China.
| |
Collapse
|
9
|
Yang H, Long Y, Li H, Pan S, Liu H, Yang J, Hu X. Carbon dots synthesized by hydrothermal process via sodium citrate and NH4HCO3 for sensitive detection of temperature and sunset yellow. J Colloid Interface Sci 2018; 516:192-201. [DOI: 10.1016/j.jcis.2018.01.054] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 01/10/2018] [Accepted: 01/14/2018] [Indexed: 12/28/2022]
|