1
|
Hu X, Luo X, Zhou Z, Wang R, Hu Y, Zhang G, Zhang G. Multi-Spectroscopic and Molecular Simulation Approaches to Characterize the Intercalation Binding of 1-Naphthaleneacetic Acid With Calf Thymus DNA. FRONTIERS IN TOXICOLOGY 2022; 3:620501. [PMID: 35295128 PMCID: PMC8915802 DOI: 10.3389/ftox.2021.620501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 03/22/2021] [Indexed: 01/04/2023] Open
Abstract
1-Naphthaleneacetic acid (NAA), having high-quality biological activity and great yield-increasing potential in agricultural production, is a broad-spectrum plant growth regulator. Although NAA is of low toxicity, it can affect the balance of the human metabolism and damage the body if it is used in high quantity for a long time. In this study, the interaction of NAA with calf thymus DNA (ctDNA) was investigated under simulated human physiological acidity (pH 7.4) using fluorescence, ultraviolet-visible absorption, and circular dichroism spectroscopy combined with viscosity measurements and molecular simulation techniques. The quenching of the endogenous fluorescence of NAA by ctDNA, observed in the fluorescence spectrum experiment, was a mixed quenching process that mainly resulted from the formation of the NAA-ctDNA complex. NAA mainly interacted with ctDNA through hydrophobic interaction, and the binding constant and quenching constant at room temperature (298 K) were 0.60 × 105 L mol-1 and 1.58 × 104 L mol-1, respectively. Moreover, the intercalation mode between NAA and ctDNA was verified in the analysis of melting point, KI measurements, and the viscosity of ctDNA. The results were confirmed by molecular simulation, and it showed that NAA was enriched near the C-G base of ctDNA. As shown in circular dichroism spectra, the positive peak intensity of ctDNA intensified along with a certain degree of redshift, while the negative peak intensity decreased after binding with NAA, suggesting that the binding of NAA induced the transformation of the secondary structure of ctDNA from B-form to A-form. These researches will help to understand the hazards of NAA to the human body more comprehensively and concretely, to better guide the use of NAA in industry and agriculture.
Collapse
Affiliation(s)
- Xing Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Xiaoqiao Luo
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Zhisheng Zhou
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Rui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Yaqin Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Guimei Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Guowen Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| |
Collapse
|
3
|
He K, Liang X, Wei T, Liu N, Wang Y, Zou L, Bai C, Yao Y, Wu T, Kong L, Zhang T, Xue Y, Tang M. A metabolomics study: CdTe/ZnS quantum dots induce polarization in mice microglia. CHEMOSPHERE 2020; 246:125629. [PMID: 31927360 DOI: 10.1016/j.chemosphere.2019.125629] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 12/02/2019] [Accepted: 12/09/2019] [Indexed: 06/10/2023]
Abstract
In this study, a metabolomic analysis was used to reveal the neurotoxicity of the CdTe/ZnS QDs via microglia polarization. A gas chromatography-mass spectrometer (GC-MS) was applied to uncover the metabonomic changes in microglia (BV-2 cell line) after exposure to 1.25 μM CdTe/ZnS QDs. 11 annotated metabolic pathways (KEGG database) were significantly changed in all exposed groups (3 h, 6 h, 12 h), 3 of them were related to glucose metabolism. The results of the Seahorse XFe96 Analyzer indicated that the CdTe/ZnS QDs increased the glycolysis level of microglia by 86% and inhibited the aerobic respiration level by 54% in a non-hypoxic environment. In vivo study, 3 h after the injection of CdTe/ZnS QDs (2.5 mM) through the tail vein in mice, the concentration of the CdTe/ZnS QDs in hippocampus reached the peak (1.25 μM). The polarization level of microglia (Iba-1 immunofluorescence) increased 2.7 times. In vitro study, the levels of the extracellular TNF-α, IL-1β and NO of BV-2 cells were all increased significantly after a 6 h or 12 h exposure. According to the results of the Cell Counting Kit-8, after a 6 h or 12 h exposure to the CdTe/ZnS QDs, the exposed microglia could significantly decrease the number of neurons (HT-22 cell line). This study proved that CdTe/ZnS QDs could polarize microglia in the brain and cause secondary inflammatory damage to neurons. There are potential risks in the application of the CdTe/ZnS QDs in brain tissue imaging.
Collapse
Affiliation(s)
- Keyu He
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China; Blood Transfusion Department, Zhongda Hospital, Southeast University, Nanjing, Jiangsu, China
| | - Xue Liang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Tingting Wei
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Na Liu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Yan Wang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Linyue Zou
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Changcun Bai
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Ying Yao
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Tianshu Wu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Lu Kong
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Ting Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Yuying Xue
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Meng Tang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China.
| |
Collapse
|
4
|
Yang C, Liu Y, Xu C, Bai A, Hu Y. A sensitive fluorescent sensor based on the photoinduced electron transfer mechanism for cefixime and ctDNA. J Mol Recognit 2020; 33:e2816. [DOI: 10.1002/jmr.2816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/03/2019] [Accepted: 09/05/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Cheng‐Zhang Yang
- Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical EngineeringHubei Normal University Huangshi PR China
| | - Yong‐Chang Liu
- Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical EngineeringHubei Normal University Huangshi PR China
| | - Cheng Xu
- Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical EngineeringHubei Normal University Huangshi PR China
| | - Ai‐Min Bai
- Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical EngineeringHubei Normal University Huangshi PR China
| | - Yan‐Jun Hu
- Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical EngineeringHubei Normal University Huangshi PR China
| |
Collapse
|
5
|
Zhou Z, Hu X, Zhang G, Wang R, Gong D. Exploring the binding interaction of Maillard reaction by-product 5-hydroxymethyl-2-furaldehyde with calf thymus DNA. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:3192-3202. [PMID: 30548611 DOI: 10.1002/jsfa.9536] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/29/2018] [Accepted: 12/10/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND 5-Hydroxymethyl-2-furaldehyde (5-HMF), a by-product of the Maillard reaction, usually present in fried and baked food, may cause potential harm to the human body. Here, the interaction between 5-HMF and calf thymus DNA (ctDNA) under physiological buffer (pH 7.4) was studied using multi-spectroscopic methods combined with multivariate curve resolution-alternating least squares (MCR-ALS) chemometrics and molecular simulation techniques. RESULTS The concentration profiles and pure spectra of the three components (5-HMF, ctDNA and 5-HMF-ctDNA complex) were extracted from highly overlapping spectra using MCR-ALS analysis, which verified the formation of 5-HMF-ctDNA complex. The binding constant being of the order of 103 L mol-1 at four temperatures (292, 298, 304 and 310 K) indicated a weak affinity in the binding of 5-HMF to ctDNA. The binding interaction was mainly driven by hydrogen bonds and van der Waals forces. Viscosity analysis, melting assay, ionic strength effect and competitive fluorescence studies ascertained that 5-HMF bound to ctDNA through groove binding, and it tended to bind to guanine-cytosine rich region of ctDNA which was characterized using Fourier transform infrared spectra and molecular docking. Circular dichroism spectral analysis and DNA cleavage assays indicated that the ctDNA conformation was altered from B to A form and 5-HMF caused DNA damage at higher concentration. CONCLUSIONS The results suggested that 5-HMF bound to ctDNA through groove binding and caused DNA damage. This research may contribute to understand the binding mechanism of 5-HMF to ctDNA and to the assessment of the toxicological effect of 5-HMF in biological processes. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
- Zhisheng Zhou
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Xing Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Guowen Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Rui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Deming Gong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Department of Biomedicine, New Zealand Institute of Natural Medicine Research, Auckland, New Zealand
| |
Collapse
|
6
|
Wang J, Xiang X, Milcovich G, Chen J, Chen C, Feng J, Hudson SP, Weng X, Ruan Y. Nitrogen and sulfur co-doped carbon nanodots toward bovine hemoglobin: A fluorescence quenching mechanism investigation. J Mol Recognit 2018; 32:e2761. [PMID: 30133028 DOI: 10.1002/jmr.2761] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 06/04/2018] [Accepted: 07/11/2018] [Indexed: 12/12/2022]
Abstract
A deep understanding of the molecular interactions of carbon nanodots with biomacromolecules is essential for wider applications of carbon nanodots both in vitro and in vivo. Herein, nitrogen and sulfur co-doped carbon dots (N,S-CDs) with a quantum yield of 16% were synthesized by a 1-step hydrothermal method. The N,S-CDs exhibited a good dispersion, with a graphite-like structure, along with the fluorescence lifetime of approximately 7.50 ns. Findings showed that the fluorescence of the N,S-CDs was effectively quenched by bovine hemoglobin as a result of the static fluorescence quenching. The mentioned quenching mechanism was investigated by the Stern-Volmer equation, temperature-dependent quenching, and fluorescence lifetime measurements. The binding constants, number of binding sites, and the binding average distance between the energy donor N,S-CDs and acceptor bovine hemoglobin were calculated as well. These findings will provide for valuable insights on the future bioapplications of N,S-CDs.
Collapse
Affiliation(s)
- Jiajun Wang
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, China
| | - Xueqing Xiang
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, China
| | - Gesmi Milcovich
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Castletroy, Ireland
| | - Jingru Chen
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, China
| | - Chao Chen
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, China
| | - Jiuju Feng
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, China
| | - Sarah P Hudson
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Castletroy, Ireland
| | | | - Yongming Ruan
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, China
| |
Collapse
|