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Li X, Tian S, Riezman I, Qin Y, Riezman H, Feng S. A sensitive, expandable AQC-based LC-MS/MS method to measure amino metabolites and sphingolipids in cell and serum samples. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1245:124256. [PMID: 39094252 DOI: 10.1016/j.jchromb.2024.124256] [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: 04/08/2024] [Revised: 07/11/2024] [Accepted: 07/21/2024] [Indexed: 08/04/2024]
Abstract
Sphingolipids are a major lipid species found in all eukaryotes. Among structurally complex and diversified lipids, sphingoid bases have been heavily linked to various metabolic diseases. However, most current LC-MS-based methods lack the sensitivity to detect low-abundant sphingoid bases. The 6-Aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC) derivatization reagent, which efficiently forms covalent bonds with amino groups, has been widely used for amino acid detection. Nevertheless, the commonly used reverse-phase HPLC method for amino acid analysis is not suitable for amphipathic sphingolipids. To address this issue, we report a robust reverse-phase HPLC-MS/MS method capable of separating and detecting hydrophilic amino acids and sphingoid bases in a single run with high sensitivity. This method is also inclusive of other amino metabolites with an expandable target list. We tested this method under various conditions and samples, demonstrating its high reproducibility and sensitivity. Using this approach, we systematically analyzed human serum samples from healthy individuals, dyslipidemia, and type II diabetes mellitus (T2DM) patients, respectively. Two sphingolipids and five amino acids were identified with significant differences between the control and T2DM groups, highlighting the potential of this method in clinical studies.
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Affiliation(s)
- Xiaotian Li
- Lipid Metabolism and Chemical Biology Unit, Key Laboratory of Immune Response and Immunotherapy, Shanghai Institute of Immunity and Infection, Chinese Academy of Sciences, Shanghai 200031, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuwei Tian
- Department of Ophthalmology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 71000, Shanxi, China
| | - Isabelle Riezman
- Department of Biochemistry, University of Geneva, CH-1206, Switzerland
| | - Yujiao Qin
- Lipid Metabolism and Chemical Biology Unit, Key Laboratory of Immune Response and Immunotherapy, Shanghai Institute of Immunity and Infection, Chinese Academy of Sciences, Shanghai 200031, China
| | - Howard Riezman
- Department of Biochemistry, University of Geneva, CH-1206, Switzerland
| | - Suihan Feng
- Lipid Metabolism and Chemical Biology Unit, Key Laboratory of Immune Response and Immunotherapy, Shanghai Institute of Immunity and Infection, Chinese Academy of Sciences, Shanghai 200031, China.
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2
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Zhang J, Yang J, Luo Y, Li J, Gong T, Huang S, Xiong Y, Jiang X. Determination of 23 Amino Acids and Amines in Plasma and Cortex of C57BL/6 Mice with HPLC-FLD. J Chromatogr Sci 2023; 62:44-57. [PMID: 36572394 DOI: 10.1093/chromsci/bmac103] [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: 04/08/2022] [Revised: 06/22/2022] [Accepted: 11/24/2022] [Indexed: 01/04/2024]
Abstract
Using 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate as a pre-column derivatization reagent, optimized derivatization and chromatography parameters, a simple high-performance liquid chromatography fluorescence detector (HPLC-FLD) method was developed and validated to determine 23 related amines in plasma and cortex of C57BL/6 mice with cerebral ischemia-reperfusion injury. The prepared samples were separated on a ZORBAX SB-C18 column (4.6 mm × 250 mm, 5 μm) with 60% acetonitrile (ACN) and 20 mM sodium acetate solution (pH adjusted to 5.0 by phosphoric acid). All analytes achieved good separation within 1.2 h at a flow rate of 1 mL/min. The limits of detection and limits of detection quantitation of the method were ranged from (0.1-9.2) to (0.3-30.6) ng/mL, respectively. The analytical method was apt for simultaneously determining 23 amino acids in plasma and cortex. Our results revealed that the relevant amino acids were significantly altered (P < 0.05) in C57BL/6 mice.
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Affiliation(s)
- Jing Zhang
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Junqing Yang
- Key Laboratory of Pharmacology of Chongqing, Chongqing Medical University, Chongqing 400016, China
| | - Ying Luo
- Key Laboratory of Pharmacology of Chongqing, Chongqing Medical University, Chongqing 400016, China
| | - Jiansha Li
- Jiangsu Hengrui Pharmaceutical Co. Ltd, Chongqing 400042, China
| | - Tao Gong
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Suqiong Huang
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Yan Xiong
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Xinhui Jiang
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing 400016, China
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3
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Liu L, Bao GY, Zhang SS, Qin Y, Chen XP, Wang MD, Zhu JP, Yin H, Lin GQ, Feng CG, Zhang F, Guo YL. Analysis of the Amine Submetabolome Using Novel Isotope-Coded Pyrylium Salt Derivatization and LC-MS: Herbs and Cancer Tissues as Cases. Anal Chem 2022; 94:17606-17615. [PMID: 36473140 DOI: 10.1021/acs.analchem.2c04246] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The amine submetabolome, including amino acids (AAs) and biogenic amines (BAs), is a class of small molecular compounds exhibiting important physiological activities. Here, a new pyrylium salt named 6,7-dimethoxy-3-methyl isochromenylium tetrafluoroborate ([d0]-DMMIC) with stable isotope-labeled reagents ([d3]-/[d6]-DMMIC) was designed and synthesized for amino compounds. [d0]-/[d3]-/[d6]-DMMIC-derivatized had a charged tag and formed a set of molecular ions with an increase of 3.02 m/z and the characteristic fragment ions of m/z 204.1:207.1:210.1. When DMMIC coupled with liquid chromatography-mass spectrometry (LC-MS), a systematic methodology evaluation for quantitation proved to have good linearity (R2 between 0.9904 and 0.9998), precision (interday: 2.2-21.9%; intraday: 1.0-19.7%), and accuracy (recovery: 71.8-108.8%) through the test AAs. Finally, the methods based on DMMIC and LC-MS demonstrated the advantaged application by the nontargeted screening of BAs in a common medicinal herb Senecio scandens and an analysis of metabolic differences among the amine submetabolomes between the carcinoma and paracarcinoma tissues of esophageal squamous cell carcinoma (ESCC). A total of 20 BA candidates were discovered in S. scandens as well as the finding of 13 amine metabolites might be the highest-potential differential metabolites in ESCC. The results showed the ability of DMMIC coupled with LC-MS to analyze the amine submetabolome in herbs and clinical tissues.
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Affiliation(s)
- Li Liu
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China.,Department of Thoracic Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, P. R. China
| | - Geng-Yu Bao
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China.,Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Shu-Sheng Zhang
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China
| | - Yong Qin
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China
| | - Xiu-Ping Chen
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China
| | - Ming-Dan Wang
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China
| | - Jian-Ping Zhu
- Guangxi Institute for Food and Drug Control, Nanning 530021, P. R. China
| | - Hang Yin
- Department of Thoracic Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, P. R. China
| | - Guo-Qiang Lin
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China.,Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Chen-Guo Feng
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China.,Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Fang Zhang
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China.,Guangxi Institute for Food and Drug Control, Nanning 530021, P. R. China.,Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Yin-Long Guo
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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Bùi NKN, Selberg S, Herodes K, Leito I. Coumarin-based derivatization reagent for the LC-MS analysis of amino acids. Talanta 2022; 252:123730. [DOI: 10.1016/j.talanta.2022.123730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 07/04/2022] [Accepted: 07/06/2022] [Indexed: 10/16/2022]
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5
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Zhang J, Yang J, Luo Y, Li J, Gong T, Huang S, Xiong Y, Jiang X. Determination of 23 related analytes in bone marrow fluid and hippocampus of C57BL/6 mice on cerebral ischemia-reperfusion injury by HPLC-FLD. Biomed Chromatogr 2022; 36:e5435. [PMID: 35763335 DOI: 10.1002/bmc.5435] [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: 02/12/2022] [Revised: 05/27/2022] [Accepted: 06/23/2022] [Indexed: 11/10/2022]
Abstract
The study of brain diseases has long been of interest to researchers worldwide, and stroke is the third leading cause of death that threatens human health. At the same time, a cerebral ischemia-reperfusion injury is closely associated with high rates of disability and mortality. The conditions of the 6-Aminoquinolyl N-hydroxysccinimidyl carbamate (AQC) method for the derivatization of amino acids in the bone marrow fluid and hippocampus of C57BL/6 mice with cerebral ischemia/reperfusion injury were explored and optimized, such as the column temperature, concentration of derivatization reagents, and mobile phase concentration were investigated and optimized. The mobile phase consisted of 20 mM sodium acetate solution (phosphoric acid to adjust pH 5.0) and 60% acetonitrile solution at the flow rate of 1 mL•min-1 . The 23 analytes were separated and determined in a gradient elution procedure; the correlation coefficient r was greater than 0.9990 in the range of 0.1-8.0 μg•mL-1 . The results showed that the content of relevant analytes was significantly changed in the cerebral ischemia-reperfusion injury model, the method was suitable for the simultaneous determination of 23 amino acids in bone marrow fluid and hippocampus of C57BL/6 mice.
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Affiliation(s)
- Jing Zhang
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Junqing Yang
- Key Laboratory of Pharmacology of Chongqing, Chongqing Medical University, Chongqing, China
| | - Ying Luo
- Key Laboratory of Pharmacology of Chongqing, Chongqing Medical University, Chongqing, China
| | - Jiansha Li
- Jiangsu Hengrui Pharmaceutical Co.Ltd., Chongqing, China
| | - Tao Gong
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Suqiong Huang
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Yan Xiong
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Xinhui Jiang
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Chongqing, China
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6
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Yang Q, Wang Y, Yang M, Liu X, Lyu S, Liu B, Liu J, Zhang T. Effect of glycation degree on the structure and digestion properties of ovalbumin: A study of amino acids and peptides release after in vitro gastrointestinal simulated digestion. Food Chem 2022; 373:131331. [PMID: 34731794 DOI: 10.1016/j.foodchem.2021.131331] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 07/26/2021] [Accepted: 10/02/2021] [Indexed: 11/04/2022]
Abstract
Glycation can improve the functional properties of protein. However, in vitro and animal studies have shown that glycation induced lysine blockage and impaired protein digestibility. This study aimed to explore the effects of different glycation degree on the structure and digestive characteristics of ovalbumin. The results showed that glycation decreased the turbidity and hydrophobicity of the protein and changed the protein structure. Moreover, the results of in vitro simulated digestion revealed that glycation reduced the contents of essential amino acids and total amino acids after digestion. Glycation changed the amino acids and peptides release from the protein by resisting the digestion of digestive enzymes, especially trypsin. In conclusion, this work links glycation, protein digestibility, and the release of amino acids and peptides. This emphasizes the importance of the balance between improving properties and ensuring the digestibility of proteins during food processing.
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Affiliation(s)
- Qi Yang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Ying Wang
- College of Food Science and Engineering, Jilin Engineering Normal University, Changchun 130052, People's Republic of China
| | - Meng Yang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Xuanting Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Siwen Lyu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Boqun Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Jingbo Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Ting Zhang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
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7
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Li J, Ma J, Li Q, Fan S, Fan L, Ma H, Zhang Y, Zheng L. Determination of 35 Free Amino Acids in Tea Using Ultra-Performance Liquid Chromatography Coupled With Quadrupole Time-of-Flight Mass Spectrometry. Front Nutr 2021; 8:767801. [PMID: 34957181 PMCID: PMC8697017 DOI: 10.3389/fnut.2021.767801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 10/29/2021] [Indexed: 11/30/2022] Open
Abstract
The purpose of this research was to develop a simple, sensitive, and accurate method for simultaneous determination of 35 free amino acids using ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF/MS). Tea samples were extracted with boiling water bath, and then separated by XBridge BEH Amide column by gradient elution. The exact mass and MS/MS spectra of the target compound was detected under the TOF–MS and Information dependent acquisition (IDA)–MS/MS mode. The results demonstrated good linearity (R2 > 0.9980) in the range of 0.5–1,000 ng/mL. The limits of detection (LODs) were 0.13–25.00 mg/kg and the limits of quantitation (LOQs) were 0.25–50.00 mg/kg. The recovery rate ranged from 70.1 to 105.1% with relative standard deviations (RSDs) <11% (n = 6). This research provides a targeted strategy for developing an analysis method for amino acids in tea.
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Affiliation(s)
- Jian Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China.,College of Applied Arts and Science, Beijing Union University, Beijing, China
| | - Junmei Ma
- Hebei Food Safety Key Laboratory, Hebei Food Inspection and Research Institute, Shijiazhuang, China.,Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang, China
| | - Qiang Li
- Hebei Food Safety Key Laboratory, Hebei Food Inspection and Research Institute, Shijiazhuang, China
| | - Sufang Fan
- Hebei Food Safety Key Laboratory, Hebei Food Inspection and Research Institute, Shijiazhuang, China
| | - Lixin Fan
- Hebei Food Safety Key Laboratory, Hebei Food Inspection and Research Institute, Shijiazhuang, China
| | - Hongyu Ma
- Hebei Food Safety Key Laboratory, Hebei Food Inspection and Research Institute, Shijiazhuang, China
| | - Yan Zhang
- Hebei Food Safety Key Laboratory, Hebei Food Inspection and Research Institute, Shijiazhuang, China.,Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang, China
| | - Lei Zheng
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
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8
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Etxabide A, Kilmartin PA, Maté JI, Prabakar S, Brimble M, Naffa R. Analysis of Advanced Glycation End products in ribose-, glucose- and lactose-crosslinked gelatin to correlate the physical changes induced by Maillard reaction in films. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106736] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Ge H, Jiang Y, Ning Z, Hu Z, Ma S, Shao Y, Liu J, Zhang T. Supplementation of egg white peptides on attenuating skin mechanical damage symptoms: a promising way to accelerate wound healing process. Food Funct 2021; 12:7688-7698. [PMID: 34282438 DOI: 10.1039/d1fo01525g] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recent studies have indicated that active peptides can induce an improvement in wound repair. Herein, we evaluated egg white peptides (EWPs) as a nutritional supplement to improve mechanical skin damage in BALB/c mice. Two symmetrical circular full-thickness wounds were created with 5 mm biopsy punches in the skin of the mouse dorsal region, and EWPs (200, and 400 mg kg-1) were administrated by gavage for 14 days. We analyzed the EWPs for their in vivo and in vitro antioxidant capability, toxicity, and microscopy of skin wounds, and there was no cytotoxicity or in vivo toxicity. During the period of wound healing, EWPs could promote healthy cell migration, increase serum superoxide dismutase and catalase activities and accelerate the wound healing process in a time- and dose-dependent manner, whereas the levels of malondialdehyde and reactive oxygen species showed the opposite trend. After administration with 400 mg kg-1 EWPs for 10 days, the wound had almost healed. Meanwhile, EWPs significantly enhanced serum amino acids, particularly enhancing the content of Arg, Glu, Pro, Met, and Lys, which could provide sufficient nutrition in the wound healing process. The present study demonstrates that EWPs possess a positive potential to accelerate the wound healing process of mechanical skin damage at the cellular and animal level.
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Affiliation(s)
- Huifang Ge
- Jilin Provincial Key Laboratory of Nutrition and Functional Food and College of Food Science and Engineering, Jilin University, Changchun, 130062, People's Republic of China.
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10
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A Closer Examination of 6-Aminoquinolyl-N-Hydroxysuccinimidyl Carbamate Amino Acid Derivatization in HPLC with Multiple Detection Modes. Chromatographia 2021. [DOI: 10.1007/s10337-021-04051-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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11
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Naffa R, Gaar J, Zhang W, Maidment C, Shehadi I, Etxabide A, Holmes G, Kavianinia I, Brimble M. Rapid and simultaneous analysis of advanced glycation end products on silica hydride column: Comparison of ultraviolet, fluorescence, and mass spectrometry detectors. SEPARATION SCIENCE PLUS 2020. [DOI: 10.1002/sscp.202000077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rafea Naffa
- NZ Leather and Shoe Research Association (LASRA®) Palmerston North New Zealand
| | - Jakob Gaar
- School of Chemical Sciences University of Auckland Auckland New Zealand
| | - Wenkai Zhang
- NZ Leather and Shoe Research Association (LASRA®) Palmerston North New Zealand
| | - Catherine Maidment
- NZ Leather and Shoe Research Association (LASRA®) Palmerston North New Zealand
| | - Ihsan Shehadi
- College of Science Department of Chemistry University of Sharjah Sharjah UAE
| | - Alaitz Etxabide
- School of Chemical Sciences University of Auckland Auckland New Zealand
- ALITEC Research Group Department of Agronomy Biotechnology and Food School of Agricultural Engineering Public University of Navarre (upna/nup) Pamplona‐Iruña Spain
| | - Geoff Holmes
- NZ Leather and Shoe Research Association (LASRA®) Palmerston North New Zealand
| | - Iman Kavianinia
- School of Chemical Sciences University of Auckland Auckland New Zealand
| | - Margaret Brimble
- School of Chemical Sciences University of Auckland Auckland New Zealand
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Adsorptive Removal of Antibiotic Ciprofloxacin from Aqueous Solution Using Protein-Modified Nanosilica. Polymers (Basel) 2020; 12:polym12010057. [PMID: 31906267 PMCID: PMC7023575 DOI: 10.3390/polym12010057] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 12/02/2022] Open
Abstract
The present study aims to investigate adsorptive removal of molecular ciprofloxacin using protein-modified nanosilica (ProMNS). Protein was successfully extracted from Moringa seeds while nanosilica was synthesized from rice husk. Fourier-transform infrared (FTIR), ultraviolet visible (UV-Vis) and high-performance liquid chromatography (HPLC) were used to evaluate the characterization of protein. Adsorption of protein onto nanosilica at different pH and ionic strength was thoroughly studied to modify nanosilica surface. The removal efficiency of antibiotic ciprofloxacin (CFX) increased from 56.84% to 89.86% after surface modification with protein. Effective conditions for CFX removal using ProMNS were systematically optimized and found to be pH 7.0, adsorption time 90 min, adsorbent dosage 10 mg/mL, and ionic strength 1 mM KCl. A two-step model was successfully used to fit the adsorption isotherms of CFX onto ProMNS at different ionic strength while a pseudo-second-order model could fit adsorption kinetic of CFX onto ProMNS very well. Maximum adsorption capacity was very high that reached to 85 mg/g. Adsorption of CFX onto ProMNS decreased with increasing KCl concentration, suggesting that adsorption of CFX onto ProMNS is mainly controlled by electrostatic attraction between positively charged ProMNS surface and anionic species of CFX. Adsorption mechanisms of CFX onto ProMNS were discussed in detail based on adsorption isotherms, the change in surface charge by zeta potentail and the change in functional groups by FT-IR. The removal of CFX after three regenerations was greater than 73% while CFX removal from an actual hospital wastewater using ProMNS reached to 70%. Our results suggest that ProMNS is a new and eco-friendly adsorbent to remove antibiotics from aqueous solutions.
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Zhang Y, Naffa R, Garvey CJ, Maidment CA, Prabakar S. Quantitative and structural analysis of isotopically labelled natural crosslinks in type I skin collagen using LC-HRMS and SANS. JOURNAL OF LEATHER SCIENCE AND ENGINEERING 2019. [DOI: 10.1186/s42825-019-0012-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AbstractCollagen structure in biological tissues imparts its intrinsic physical properties by the formation of several covalent crosslinks. For the first time, two major crosslinks in the skin dihydroxylysinonorleucine (HLNL) and histidinohydroxymerodesmosine (HHMD), were isotopically labelled and then analysed by liquid-chromatography high-resolution accurate-mass mass spectrometry (LC-HRMS) and small-angle neutron scattering (SANS). The isotopic labelling followed by LC-HRMS confirmed the presence of one imino group in both HLNL and HHMD, making them more susceptible to degrade at low pH. The structural changes in collagen due to extreme changes in the pH and chrome tanning were highlighted by the SANS contrast variation between isotopic labelled and unlabelled crosslinks. This provided a better understanding of the interaction of natural crosslinks with the chromium sulphate in collagen suggesting that the development of a benign crosslinking method can help retain the intrinsic physical properties of the leather. This analytical method can also be applied to study artificial crosslinking in other collagenous tissues for biomedical applications.Graphical abstract
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