1
|
Dybowski MP, Dawidowicz AL, Rombel M, Typek R. GC vs. HPLC in quantitation of CBD, CBG, ∆9-THC and CBN in plasma using different sample preparation methods. J Pharm Biomed Anal 2023; 234:115563. [PMID: 37453144 DOI: 10.1016/j.jpba.2023.115563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/19/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023]
Abstract
The sensitivity of complex analytical procedures depends not only on the sensitivity of the analytical instrument used, but also on the recovery degree of the examined analyte by the employed sample preparation method. The recovery degrees of individual cannabinoids reported in literature, estimated using the same sample preparation method, are unexpectedly divergent. Therefore, the aim of this study was a thorough assessment of the most commonly used sample preparation methods, such as protein precipitation, LLE, QuEChERS and SPE, in the context of the reliability of the obtained results. The presented report shows that the highest sensitivity, precision and reliability of the chromatographic analysis of CBG, CBD, ∆9-THC and CBN in human plasma can be obtained using SPE. The recovery degrees of these cannabinoids by SPE are highly repeatable and exceed 95 %, while they are significantly lower for such sample preparation methods as protein precipitation, LLE and QuEChERS (ca. 80, 65 and 87, respectively). Moreover, the supernatants obtained by the latter methods contain interferents evoking matrix-effect, which makes reliable quantification of the listed cannabinoids by GC difficult. To our knowledge, the paper is the first such extensive comparison of sample preparation procedures used for the determination of cannabinoids in plasma by GC-MS and HPLC-MS. The presented results and the discussion allow to understand why different recovery degrees for the same xenobiotic can be find in literature despite they have been estimated using the same or different sample preparation method or different chromatography types.
Collapse
Affiliation(s)
- Michal P Dybowski
- Department of Chromatography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Sklodowska University in Lublin, 20-031 Lublin, Poland.
| | - Andrzej L Dawidowicz
- Department of Chromatography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Sklodowska University in Lublin, 20-031 Lublin, Poland
| | - Michal Rombel
- Department of Chromatography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Sklodowska University in Lublin, 20-031 Lublin, Poland
| | - Rafal Typek
- Department of Chromatography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Sklodowska University in Lublin, 20-031 Lublin, Poland
| |
Collapse
|
2
|
Guo Y, He Z, Zhu Y, Liu S, Gao P, Xie K, Zhang T, Dong Y. Separation and Detection of Abamectin, Ivermectin, Albendazole and Three Metabolites in Eggs Using Reversed-Phase HPLC Coupled with a Photo Diode Array Detector. Foods 2022; 11. [PMID: 36496702 DOI: 10.3390/foods11233894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/24/2022] [Accepted: 11/28/2022] [Indexed: 12/10/2022] Open
Abstract
An innovative and sensitive approach using high-performance liquid chromatography-photo diode array detection (HPLC-PDAD) was developed and optimized for the simultaneous determination of abamectin (ABM), ivermectin (IVM), albendazole (ABZ) and three metabolites in eggs. The samples were extracted with acetonitrile (MeCN)/water (90:10, v/v), and the extracts containing the targets were cleaned up and concentrated by a series of liquid-liquid extraction (LLE) steps. A reversed-phase C18 column and a mobile phase consisting of 0.1% trifluoroacetic acid (TFA) aqueous solution and methanol (MeOH) were utilized to perform optimal chromatographic separation. The developed method was validated on the basis of international guidelines. The limits of detection (LODs) and quantitation (LOQs) were 2.1-10.5 µg/kg and 7.8-28.4 µg/kg, respectively. Satisfactory linear relationships were observed for the targets in their corresponding concentration ranges. The mean recoveries ranged from 85.7% to 97.21% at 4 addition levels, with intraday and interday relative standard deviations (RSDs) in the ranges of 1.68-4.77% and 1.74-5.31%, respectively. The presented protocol was demonstrated to be applicable and reliable by being applied for the detection of target residues in locally sourced egg samples.
Collapse
|
3
|
Chi KX, Yu H, Guo YH, Cheng YL, Xie YF, Yao WR. Development of UPLC-MS/MS method for determining hainanmycin in foods of animal origin. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:1401-1411. [PMID: 35679265 DOI: 10.1080/19440049.2022.2083693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Hainanmycin is a polyether antibiotic. Toxicological studies have shown the adverse effects of hainanmycin on animals and humans. At present, no study is available on the detection of hainanmycin in edible tissues of animals. Hence, a fast and accurate detection method for hainanmycin is essential. This study aimed to develop a new analytical method based on ultra-high-performance liquid chromatography-tandem mass spectrometry to detect hainanmycin in 10 matrices, including milk, eggs, fat, kidney, muscles and livers of chicken, beef and sheep. The limit of detection and the limit of quantitation of the 10 matrices were 0.1-0.4 μg/kg and 0.25-1 μg/kg, respectively, and were far below the maximum residue limits of other polyether anticoccidial drugs (1-150 μg/kg). The recoveries of hainanmycin ranged from 79% to 105%, and the relative standard deviation ranged from 2.8% to 12.0%. The research results prove that the proposed method is operational and simple in detecting hainanmycin, and has high precision and accuracy in a variety of matrices.
Collapse
Affiliation(s)
- Ke-Xin Chi
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China
| | - Hang Yu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China
| | - Ya-Hui Guo
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China
| | - Yu-Liang Cheng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China
| | - Yun-Fei Xie
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China
| | - Wei-Rong Yao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, China
| |
Collapse
|
4
|
López-Ruiz R, Marín-Sáez J, Prestes OD, Romero-González R, Garrido Frenich A. Critical Evaluation of Analytical Methods for the Determination of Anthropogenic Organic Contaminants in Edible Oils: An Overview of the Last Five Years. Crit Rev Anal Chem 2022; 53:1733-1747. [PMID: 35175888 DOI: 10.1080/10408347.2022.2040352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
Anthropogenic contaminants, as pesticides, polycyclic aromatic hydrocarbons (PAHs) and monochloropropanediols (MCPDs), have become important to be controlled in edible oils, since their regular occurrence. In fact, alerts from the Rapid Alert System for Food and Feed (RASFF) in oils normally include these compounds. From a critical point of view, tools used to control these compounds in the last 5 years will be discussed, including sample preparation, analysis and current regulations. Extraction and analysis methods will be discussed next, being liquid-liquid extraction (LLE) and QuEChERS, with or without clean-up step, as well as chromatographic methods coupled to different analyzers (mainly mass spectrometry), the most commonly used for extraction and analysis respectively. Occurrence in samples will also be reviewed and compared with the legal maximum residue limits (MRLs), observing that 4%, 20% and 60% of the analyzed samples exceed the legal limits for pesticides, MCPDs and PAHs respectively.
Collapse
Affiliation(s)
- Rosalía López-Ruiz
- Research Group "Analytical Chemistry of Contaminants", Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence, University of Almeria, Almeria, Spain
- Laboratory of Pesticide Residue Analysis (LARP), Chemistry Department, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Jesús Marín-Sáez
- Research Group "Analytical Chemistry of Contaminants", Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence, University of Almeria, Almeria, Spain
| | - Osmar D Prestes
- Laboratory of Pesticide Residue Analysis (LARP), Chemistry Department, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Roberto Romero-González
- Research Group "Analytical Chemistry of Contaminants", Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence, University of Almeria, Almeria, Spain
| | - Antonia Garrido Frenich
- Research Group "Analytical Chemistry of Contaminants", Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence, University of Almeria, Almeria, Spain
| |
Collapse
|
5
|
Mouskeftara T, Virgiliou C, Iakovakis A, Raikos N, Gika HG. Liquid chromatography tandem mass spectrometry for the determination of nine insecticides and fungicides in human postmortem blood and urine. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1179:122824. [PMID: 34218092 DOI: 10.1016/j.jchromb.2021.122824] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 11/30/2022]
Abstract
Pesticide poisoning is a common occurrence due to their widespread use, easy access and high toxicity even in small concentrations. The most common poisoning fatalities have been observed due to exposure to organophosphates, carbamates and neonicotinoids, thus development of a method for the rapid determination of these compounds in blood and urine is of great importance for clinical and toxicology laboratories. A simple, fast and reliable method was developed for the determination of 9 pesticides in blood and urine using HPLC-MS/MS instrumentation. In order to find the most suitable sample pretreatment technique, three different sample preparation procedures: SPE, protein precipitation and QuEChERS were compared. The final optimized analytical method was fully validated with the values of parameters such as calibration linearity, accuracy, precision, recovery, matrix effect and stability being acceptable. The method proved reliable, accurate, robust and sensitive and was successfully applied for the quantitation of pesticides in three postmortem cases of pesticides poisoning.
Collapse
Affiliation(s)
- Thomai Mouskeftara
- Department of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; Biomic AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, GR 57001 Thessaloniki, Greece
| | - Christina Virgiliou
- Biomic AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, GR 57001 Thessaloniki, Greece; Department of Chemistry, Aristotle University of Thessaloniki, 54124, Greece.
| | - Achilleas Iakovakis
- Department of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Nikolaos Raikos
- Department of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; Biomic AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, GR 57001 Thessaloniki, Greece
| | - Helen G Gika
- Department of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; Biomic AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, GR 57001 Thessaloniki, Greece
| |
Collapse
|
6
|
Birich B, El Hajjaji S, Daoud NA, Bencheikh RS, Ghandi M, Badrane N. A selective method for quantification of diazinon in human plasma by GC-MS. Ann Biol Clin (Paris) 2020; 78:617-22. [PMID: 33150867 DOI: 10.1684/abc.2020.1594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Diazinon is a synthetic molecule known as an organophosphorus insecticide. It is used for gardens and for agriculture. This molecule represents a toxicological concern for humans. For this reason, the detection and the quantification of the diazinon in human samples are important in order to monitor an exposure and to diagnose intoxications. The aim of this work is to develop a selective method for the quantification of diazinon in human plasma by means of a gas chromatography (GC) with a mass spectroscopy (MS) detector. The method presented in this article includes a liquid-liquid extraction (LLE) using dichloromethane/propanol-2/heptane. The correlation coefficient for the calibration curve is 0.992. The limit of detection (LOD) and the limit of quantification (LOQ) are respectively 5 μg/L and 2 μg/L. The average recovery of the three different concentrations (15, 250 and 375 μg/L) varies from 22.8% to 31%. A test of stability at ambient temperature for 24 hours and at 4 °C for 48 hours was conducted. The relative error factor was found to be inferior to 15%. The results obtained show that the method developed gives satisfying validation parameters in human plasma. Therefore, the compound could be detected at very low concentration with a good linearity. This method can be used with other matrices, such as blood or urine, for a partial validation.
Collapse
|
7
|
Alexandridou A, Mouskeftara T, Raikos N, Gika HG. GC-MS analysis of underivatised new psychoactive substances in whole blood and urine. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1156:122308. [PMID: 33038866 DOI: 10.1016/j.jchromb.2020.122308] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 08/05/2020] [Accepted: 08/07/2020] [Indexed: 12/16/2022]
Abstract
Herein a method was develop and validated for the detection and quantification of five new psychoactive substances (NPS) belonging to three categories: synthetic cathinones (mephedrone, 3,4-MDPV), opioids (AH-7921) and cannabinoids (JWH-018, AM-2201) by EI GC-MS. Target analytes were quantified in whole blood; in urine the same compounds plus methylone were detected. Liquid-liquid extraction by MTBE - butyl acetate (1:1, v/v) in blood and butyl acetate in urine was applied for the recovery of analytes, while no derivatization was necessary for their sensitive detection and quantification. The method showed good linearity for all analytes within a concentration range from 0.25 to 2 μg/mL for mephedrone, from 0.02 to 0.16 μg/mL for 3,4-MDPV and AH-7921 and from 0.005 to 0.04 μg/mL for JWH-018 and AM-2201. LOD ranged from 0.002 μg/mL (JWH-018 and AM-2201 in blood and urine), to 0.08 μg/mL (mephedrone in urine). LOQ in blood ranged from 0.005 μg/mL for JWH-018 and AM-2201 to 0.25 μg/mL for mephedrone. Accuracy was within acceptable limits with % bias ranging from +20% to -17.98% for intra-assay study and from +18.87% to -11.16% for inter-assay study. Precision was found to be between 2.60% and 17.17% (CV%) for intra-assay study and from 6.03% to 13.72% (CV%) for inter-assay study. An intra laboratory comparison provided proof of the method robustness. The developed method can be used for the reliable and fast quantification of five NPS in blood and the detection of six NPS in urine within the practice of a clinical or forensic toxicology laboratory.
Collapse
Affiliation(s)
- Anastasia Alexandridou
- Department of Chemistry, Laboratory of Analytical Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; Department of Medicine, Laboratory of Forensic Medicine & Toxicology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Thomai Mouskeftara
- Department of Medicine, Laboratory of Forensic Medicine & Toxicology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; BIOMIC_AUTH, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th Km Thessaloniki-Thermi Rd, P.O. Box 8318, GR 57001, Thessaloniki, Greece
| | - Nikolaos Raikos
- Department of Medicine, Laboratory of Forensic Medicine & Toxicology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; BIOMIC_AUTH, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th Km Thessaloniki-Thermi Rd, P.O. Box 8318, GR 57001, Thessaloniki, Greece
| | - Helen G Gika
- Department of Medicine, Laboratory of Forensic Medicine & Toxicology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; BIOMIC_AUTH, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th Km Thessaloniki-Thermi Rd, P.O. Box 8318, GR 57001, Thessaloniki, Greece
| |
Collapse
|
8
|
Oellig C, Blankart M, Hinrichs J, Schwack W, Granvogl M. Determination of mono- and diacylglycerols from E 471 food emulsifiers in aerosol whipping cream by high-performance thin-layer chromatography-fluorescence detection. Anal Bioanal Chem 2020; 412:7441-7451. [PMID: 32862272 PMCID: PMC7533252 DOI: 10.1007/s00216-020-02876-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Accepted: 08/10/2020] [Indexed: 11/07/2022]
Abstract
Mono- and diacylglycerol (MAG and DAG) emulsifiers (E 471) are widely applied to regulate techno-functional properties in different food categories, for example, in dairy products. A method for the determination of MAG and DAG in aerosol whipping cream by high-performance thin-layer chromatography with fluorescence detection (HPTLC-FLD) after derivatization with primuline was developed. For sample preparation, aerosol whipping cream was mixed with ethanol, followed by the addition of water and liquid-liquid extraction with tert-butyl methyl ether. The sample extracts were analyzed by HPTLC-FLD on silica gel LiChrospher plates with n-pentane/n-hexane/diethyl ether (22.5:22.5:55, v/v/v) as mobile phase, when interfering matrix like cholesterol and triacylglycerols were successfully separated from the E 471 food additives. For quantitation, an emulsifier with known composition was used as calibration standard and the fluorescent MAG and DAG were scanned at 366/> 400 nm. Limits of detection and quantitation of 4 and 11 mg/100 g aerosol whipping cream were obtained for both monostearin and 1,2-distearin, respectively, and allowed the reliable quantitation of MAG and DAG from E 471 far below commonly applied emulsifier amounts. Recoveries from model aerosol whipping cream with 400 mg E 471/100 g were determined in a calibration range of 200-600 mg E 471/100 g sample and ranged between 86 and 105% with relative standard deviations below 7%. In aerosol whipping creams from the German market, E 471 amounts ranged between 384 and 610 mg/100 g.
Collapse
Affiliation(s)
- Claudia Oellig
- Department of Food Chemistry and Analytical Chemistry (170a), Institute of Food Chemistry, University of Hohenheim, Garbenstrasse 28, 70599, Stuttgart, Germany.
| | - Max Blankart
- Department of Soft Matter Science and Dairy Technology (150e), Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21, 70599, Stuttgart, Germany
| | - Jörg Hinrichs
- Department of Soft Matter Science and Dairy Technology (150e), Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21, 70599, Stuttgart, Germany
| | - Wolfgang Schwack
- Department of Food Chemistry and Analytical Chemistry (170a), Institute of Food Chemistry, University of Hohenheim, Garbenstrasse 28, 70599, Stuttgart, Germany
| | - Michael Granvogl
- Department of Food Chemistry and Analytical Chemistry (170a), Institute of Food Chemistry, University of Hohenheim, Garbenstrasse 28, 70599, Stuttgart, Germany
| |
Collapse
|
9
|
Bhardwaj VK, Singh R, Sharma J, Das P, Purohit R. Structural based study to identify new potential inhibitors for dual specificity tyrosine-phosphorylation- regulated kinase. Comput Methods Programs Biomed 2020; 194:105494. [PMID: 32447145 DOI: 10.1016/j.cmpb.2020.105494] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/01/2020] [Accepted: 04/03/2020] [Indexed: 06/11/2023]
Abstract
Background and Objectives The Dual-specificity tyrosine-phosphorylation regulated kinase-1A (DYRK1A) a serine/threonine kinase that has freshly gained recognition as an essential drug target due to the discovery of its involvement in pathological diseases. The development of new potent inhibitors of DYRK1A would contribute to clarify the molecular mechanisms of associated diseases. It would administer a new lead compound for molecular-targeted protein, which was the primary focus of our study. Methods The library of in-house synthesized pyrrolone-fused benzosuberene (PBS) compounds was docked with DYRK1A receptor. Further, molecular mechanics-Poisson Boltzmann surface area (MM-PBSA) estimations were conducted to confirm our docking outcomes and compared the stability of chosen complexes with the 2C3 (standard molecule) complex. Results This study reports Ligand15, Ligand14, and Ligand11 as potent inhibitors which showed higher ligand efficiency, binding affinity, lipophilic ligand efficiency, and favorable torsion values as compared to 2C3. Conclusion The stated methodologies revealed a unique mechanism of active site binding. The binding interactions within the active site showed that the chosen molecules had notable interactions than the standard molecule, which led to the generation of potential compounds to inhibit DYRK1A.
Collapse
Affiliation(s)
- Vijay Kumar Bhardwaj
- Structural Bioinformatics Lab, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, Himachal Pradesh, 176061, India; Biotechnology division, CSIR-IHBT, Palampur, Himachal Pradesh, 176061, India; Academy of Scientific & Innovative Research (AcSIR), CSIR-IHBT Campus, Palampur, Himachal Pradesh, 176061, India
| | - Rahul Singh
- Structural Bioinformatics Lab, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, Himachal Pradesh, 176061, India; Biotechnology division, CSIR-IHBT, Palampur, Himachal Pradesh, 176061, India
| | - Jatin Sharma
- Structural Bioinformatics Lab, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, Himachal Pradesh, 176061, India; Biotechnology division, CSIR-IHBT, Palampur, Himachal Pradesh, 176061, India
| | - Pralay Das
- Academy of Scientific & Innovative Research (AcSIR), CSIR-IHBT Campus, Palampur, Himachal Pradesh, 176061, India; Natural Product Chemistry and Process Development, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, India
| | - Rituraj Purohit
- Structural Bioinformatics Lab, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, Himachal Pradesh, 176061, India; Biotechnology division, CSIR-IHBT, Palampur, Himachal Pradesh, 176061, India; Academy of Scientific & Innovative Research (AcSIR), CSIR-IHBT Campus, Palampur, Himachal Pradesh, 176061, India.
| |
Collapse
|
10
|
Meshref MNA, Ibrahim MD, Huang R, Yang L, How ZT, Klamerth N, Chelme-Ayala P, Hughes SA, Brown C, Mahaffey A, Gamal El-Din M. Fourier transform infrared spectroscopy as a surrogate tool for the quantification of naphthenic acids in oil sands process water and groundwater. Sci Total Environ 2020; 734:139191. [PMID: 32460069 DOI: 10.1016/j.scitotenv.2020.139191] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 05/01/2020] [Accepted: 05/01/2020] [Indexed: 06/11/2023]
Abstract
Naphthenic acid fraction compounds (NAFCs), defined herein as the polar organic compounds extracted from the acidified oil sands process water (OSPW) samples using dichloromethane, are becoming the research hotspot due to their presence in large amount in OSPW and along with other potentially NA-contaminated water streams from the mining site. Fourier transform infrared spectroscopy (FTIR) method is commonly used to quantify NAFCs and assumes that the total NA concentration is measured as the sum of the responses for all carboxylic acid functional groups. In this study, the NAFCs in various OSPW and groundwater (GW) samples from an active oil sands mining site were analyzed using FTIR. All water samples were pretreated using either solid-phase extraction (SPE) or liquid-liquid extraction (LLE) methods before analysis. The results showed that SPE produced higher recoveries of NAFCs than LLE for most water samples under current experimental conditions. For the quantification of NAFCs, commercial Fluka NA mixture and a pre-calibrated OSPW extract were employed as the calibration standards. The NAFCs calibrated with Fluka NA mixture and OSPW extract had clear linear relationships. The concentrations of NAFCs obtained using OSPW extract standard curve were 2.5 times the NAFC concentrations obtained using the Fluka NA mixture standard curve. Additionally, good linear correlations were observed between the total NAs and O2-O6 NA species determined by ultra-performance liquid chromatography coupled with time-of-flight mass spectrometry (UPLC-TOFMS) and the NAFCs measured by FTIR. According to these correlations, the NA compositions in NAFCs were developed, and the relative abundances of O2-O6 NA species in NAFCs were similar for SPE and LLE pretreated samples. The findings of this study demonstrated that FTIR could be used as a promising tool to monitor total NA species and to estimate the NA profile in different environmental water samples.
Collapse
Affiliation(s)
- Mohamed N A Meshref
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Mohamed D Ibrahim
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Rongfu Huang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Lingling Yang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Zuo Tong How
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Nikolaus Klamerth
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Pamela Chelme-Ayala
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Sarah A Hughes
- Shell Health - Americas, Shell Oil Company, 150 North Dairy Ashford Road, Houston, TX 77079, USA.
| | - Christine Brown
- Canadian Natural, Technology and Development, 324-8th Ave SW, Calgary, AB T2P 2Z2, Canada
| | - Ashley Mahaffey
- Coral Waters Consulting Inc., Shell Technology Centre Calgary, 3655 36 St NW, Calgary, AB T2L 1Y8, Canada
| | - Mohamed Gamal El-Din
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
| |
Collapse
|
11
|
Singh R, Bhardwaj VK, Sharma J, Purohit R. Identification of novel and selective agonists for ABA receptor PYL3. Plant Physiol Biochem 2020; 154:387-395. [PMID: 32629182 DOI: 10.1016/j.plaphy.2020.05.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 05/03/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
Abscisic acid (ABA) although complicated and expensive to produce, plays an important role in signalling responsible for regulation of developmental manifestations such as seed maturation and surviving through stress conditions. Hence, development of cost effective molecules with minimal side effects that mimic the functions of ABA is the need of the hour. In this agreement, we screened a series of 27 in-house synthesized 3-methyleneisoindolin-1-one molecules over three ABA receptors (PYR1, PYL1, and PYL3). The commercial ABA agonist Pyrabactin was taken as a standard ligand in this study. The top three molecules for each receptor were selected and further evaluated to estimate the dynamical contribution and complex stability via Molecular Mechanics-Poisson Boltzmann surface area calculations. Two molecules (Mol26 and Mol25) showed higher binding free energy and stable complex conformation for PYL3 in comparison to Pyrabactin. This study revealed the structural basis of the binding mechanism of 3-methyleneisoindolin-1-one molecules with ABA receptors. Mol26 and Mol25 were identified for the development of specific PYL3 agonists with a vast potential in agriculture to accentuate the ABA like action in plants.
Collapse
Affiliation(s)
- Rahul Singh
- Structural Bioinformatics Lab, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, HP, 176061, India; Biotechnology Division, CSIR-IHBT, Palampur, HP, 176061, India
| | - Vijay Kumar Bhardwaj
- Structural Bioinformatics Lab, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, HP, 176061, India; Biotechnology Division, CSIR-IHBT, Palampur, HP, 176061, India; Academy of Scientific & Innovative Research (AcSIR), CSIR-IHBT Campus, Palampur, HP, 176061, India
| | - Jatin Sharma
- Structural Bioinformatics Lab, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, HP, 176061, India; Biotechnology Division, CSIR-IHBT, Palampur, HP, 176061, India
| | - Rituraj Purohit
- Structural Bioinformatics Lab, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, HP, 176061, India; Biotechnology Division, CSIR-IHBT, Palampur, HP, 176061, India; Academy of Scientific & Innovative Research (AcSIR), CSIR-IHBT Campus, Palampur, HP, 176061, India.
| |
Collapse
|
12
|
Said R, Arafat B, Arafat T. High performance liquid chromatography - Mass spectrometric bioanalytical method for the determination of dapoxetine in human plasma: Application for bioequivalence study. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1149:122154. [PMID: 32485631 DOI: 10.1016/j.jchromb.2020.122154] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 05/02/2020] [Accepted: 05/10/2020] [Indexed: 11/30/2022]
Abstract
Dapoxetine is an oral medication used for treatment of premature ejaculation (PE) in men aged (18-64 years). In this study, we present a validated, precise and sensitive method for determination of dapoxetine in human plasma by liquid chromatography/ electrospray ionization-tandem mass spectrometry. Dapoxetine and the internal standard (Dapoxetine- d6) were extracted from plasma via liquid-liquid extraction (LLE). The LC separation was performed utilizing ACE C8 (4.6 X50) mm, 5 µm column. The mobile phase was composed of acetonitrile and buffer (0.01 M Ammonium acetate +0.02% Formic acid solution) (85:15, v/v). The method was linear within the concentration range of 5.0-600 ng/mL for Dapoxetine in human plasma. Short analytical run was achieved with 1.6 min run time. Intra-day and inter-day accuracy was between 97 and 106% with precision (CV, %) of ≤ 5% achieved across all the quality control samples. Dapoxetine was stable in several conditions with recovery rates > 90%. This method was utilized successfully in clinical pharmacokinetic study following oral administration of 60 mg Dapoxetine tablets in 36 healthy male subjects. The result for all 90% confidence intervals were within the preset ranges. The method proved to be highly reproducible and sensitive and thus can be employed in bioequivalence studies and large scale sample analysis of Dapoxetine.
Collapse
Affiliation(s)
- Rana Said
- Faculty of Pharmacy, Al-Ahliyya Amman University, Amman, Jordan.
| | - Basel Arafat
- Faculty of Health, Education, Medicine and Social care, Anglia Ruskin University, UK
| | - Tawfiq Arafat
- Jordan Center for Pharmaceutical Research (JCPR), Amman, Jordan
| |
Collapse
|
13
|
Wang B, Liu J, Zhao X, Xie K, Diao Z, Zhang G, Zhang T, Dai G. Determination of Eight Coccidiostats in Eggs by Liquid-Liquid Extraction-Solid-Phase Extraction and Liquid Chromatography-Tandem Mass Spectrometry. Molecules 2020; 25:E987. [PMID: 32098439 DOI: 10.3390/molecules25040987] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/09/2020] [Accepted: 02/21/2020] [Indexed: 11/17/2022] Open
Abstract
A method for the simultaneous determination of robenidine, halofuginone, lasalocid, monensin, nigericin, salinomycin, narasin, and maduramicin residues in eggs by liquid chromatography–tandem mass spectrometry (LC–MS/MS) was developed. The sample preparation method used a combination of liquid–liquid extraction (LLE) and solid-phase extraction (SPE) technology to extract and purify these target compounds from eggs. The target compounds were separated by gradient elution using high-performance liquid chromatography (HPLC) and ultra-performance liquid chromatography (UPLC). Tandem mass spectrometry was used to quantitatively and qualitatively analyze the target compounds via electrospray ionization (ESI+) and multiple reaction monitoring mode. The HPLC–MS/MS and UPLC–MS/MS methods were validated according to the requirements defined by the European Union and the Food and Drug Administration. The limits of detection and limits of quantification of the eight coccidiostats in eggs were 0.23–0.52 µg/kg and 0.82–1.73 µg/kg for HPLC–MS/MS, and 0.16-0.42 µg/kg and 0.81-1.25 µg/kg for UPLC–MS/MS, respectively. The eggs were spiked with four concentrations of the eight coccidiostats, and the HPLC–MS/MS and UPLC–MS/MS average recoveries were all higher than 71.69% and 72.26%, respectively. Compared with the HPLC–MS/MS method, utilizing UPLC–MS/MS had the advantages of low reagent consumption, a short detection time, and high recovery and precision. Finally, the HPLC–MS/MS and UPLC–MS/MS methods were successfully applied to detect eight coccidiostats in 40 eggs.
Collapse
|
14
|
Ni Y, Chai J, Wang Y, Fang W. A Fast Radio Map Construction Method Merging Self-Adaptive Local Linear Embedding ( LLE) and Graph-Based Label Propagation in WLAN Fingerprint Localization Systems. Sensors (Basel) 2020; 20:s20030767. [PMID: 32019229 PMCID: PMC7038483 DOI: 10.3390/s20030767] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 11/16/2022]
Abstract
Indoor WLAN fingerprint localization systems have been widely applied due to the simplicity of implementation on various mobile devices, including smartphones. However, collecting received signal strength indication (RSSI) samples for the fingerprint database, named a radio map, is significantly labor-intensive and time-consuming. To solve the problem, this paper proposes a semi-supervised self-adaptive local linear embedding algorithm to build the radio map. First, this method uses the self-adaptive local linear embedding (SLLE) algorithm based on manifold learning to reduce the dimension of the high-dimensional RSSI samples and to extract a neighbor weight matrix. Secondly, a graph-based label propagation (GLP) algorithm is employed to build the radio map by semi-supervised learning from a large number of unlabeled RSSI samples to a few labeled RSSI samples. Finally, we propose a k self-adaptive neighbor weight (kSNW) algorithm, used for radio map construction in this paper, to realize online localization. The results of the experiments conducted in a real indoor environment show that the proposed method reduces the demand for large quantities of labeled samples and achieves good positioning accuracy. With only 25% labeled RSSI samples, our system can obtain positioning accuracy of more than 88%, within 3 m of localization errors.
Collapse
Affiliation(s)
- Yepeng Ni
- School of Data Science and Media Intelligence, Communication University of China, No.1 Dingfuzhuang East Street, Chaoyang District, Beijing 100024, China; (J.C.); (Y.W.)
- Correspondence: ; Tel.: +86-131-4649-7114
| | - Jianping Chai
- School of Data Science and Media Intelligence, Communication University of China, No.1 Dingfuzhuang East Street, Chaoyang District, Beijing 100024, China; (J.C.); (Y.W.)
| | - Yan Wang
- School of Data Science and Media Intelligence, Communication University of China, No.1 Dingfuzhuang East Street, Chaoyang District, Beijing 100024, China; (J.C.); (Y.W.)
| | - Weidong Fang
- Key Laboratory of Wireless Sensor Network & Communication, Shanghai Institute of Micro-System and Information Technology, Chinese Academy of Sciences, Shanghai 201800, China;
| |
Collapse
|
15
|
Babin V, Tournier BB, Davis A, Dubost E, Pigrée G, Lohier JF, Reboul V, Cailly T, Bouillon JP, Millet P, Fabis F. Design of iodinated radioligands for SPECT imaging of central human 5-HT 4R using a ligand lipophilicity efficiency approach. Bioorg Chem 2020; 96:103582. [PMID: 31978687 DOI: 10.1016/j.bioorg.2020.103582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 12/03/2019] [Accepted: 01/11/2020] [Indexed: 11/29/2022]
Abstract
A series of iodinated ligands for the SPECT imaging of 5-HT4 receptors was designed starting from the previously reported hit MR-26132. We focused on the modulation of the piperidine-containing lateral chain by introducing hydrophilic groups in order to decrease the liphophilicity of the new ligands. All the synthesized compounds were tested for their binding affinities on 5-HT4Rs and based on the Ligand Lipophilicity Efficiency approach, compound 13 was further selected for radioiodination with iodine-125 and imaging experiments. Compound 13 showed its ability to displace the specific signal of the reference compound [125I]SB-207710 but no significant detection of [125I]13 was observed in vivo in SPECT experiments.
Collapse
Affiliation(s)
- Victor Babin
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), 14000 Caen, France
| | - Benjamin B Tournier
- Division of Adult Psychiatry, Department of Psychiatry, University Hospitals of Geneva, Switzerland
| | - Audrey Davis
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), 14000 Caen, France
| | - Emmanuelle Dubost
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), 14000 Caen, France
| | | | - Jean-François Lohier
- Normandie Univ, Laboratoire de Chimie Moléculaire et Thioorganique, UMR CNRS 6507, INC3M, FR 3038, ENSICAEN & Université de Caen-Normandie, 14050 Caen, France
| | - Vincent Reboul
- Normandie Univ, Laboratoire de Chimie Moléculaire et Thioorganique, UMR CNRS 6507, INC3M, FR 3038, ENSICAEN & Université de Caen-Normandie, 14050 Caen, France
| | - Thomas Cailly
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), 14000 Caen, France; Normandie Univ, UNICAEN, IMOGERE, 14000 Caen, France; Department of Nuclear Medicine, CHU Côte de Nacre, 14000 Caen, France
| | | | - Philippe Millet
- Division of Adult Psychiatry, Department of Psychiatry, University Hospitals of Geneva, Switzerland; Department of Psychiatry, University of Geneva, Switzerland
| | - Frédéric Fabis
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), 14000 Caen, France.
| |
Collapse
|
16
|
Osborne J, Birchall K, Tsagris DJ, Lewis SJ, Smiljanic-Hurley E, Taylor DL, Levy A, Alessi DR, McIver EG. Discovery of potent and selective 5-azaindazole inhibitors of leucine-rich repeat kinase 2 (LRRK2) - Part 1. Bioorg Med Chem Lett 2019; 29:668-73. [PMID: 30554956 DOI: 10.1016/j.bmcl.2018.11.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 11/16/2018] [Accepted: 11/30/2018] [Indexed: 12/13/2022]
Abstract
Parkinson's disease is a relatively common neurological disorder with incidence increasing with age. Present treatments merely alleviate the symptoms and do not alter the course of the disease, thus identification of disease modifying therapies represents a significant unmet medical need. Mutations in the LRRK2 gene are risk-factors for developing PD and it has been hypothesized that the increased kinase activity of certain LRRK2 mutants are responsible for the damage of the dopaminergic neurons, thus LRRK2 inhibitors offer the potential to target an underlying cause of the disease. In this communication, we describe hit-to-lead medicinal chemistry program on a novel series of 5-azaindazoles. Compound 1, obtained from high-throughput screening was optimized to a highly potent, selective series of molecules with promising DMPK properties. Introduction of heterocycles at the 3-position were found to significantly increase the potency and kinase selectivity, whilst changes to the 4-chlorobenzyl group improved the physicochemical properties. Our series was licensed to a major pharmaceutical company for further development.
Collapse
|
17
|
Islam MS, Ghawas HM, El-Senduny FF, Al-Majid AM, Elshaier YAMM, Badria FA, Barakat A. Synthesis of new thiazolo-pyrrolidine-(spirooxindole) tethered to 3-acylindole as anticancer agents. Bioorg Chem 2018; 82:423-430. [PMID: 30508794 DOI: 10.1016/j.bioorg.2018.10.036] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 10/12/2018] [Accepted: 10/18/2018] [Indexed: 02/07/2023]
Abstract
Anticancer therapeutics with profiles of high potency, low toxicity, and low resistance is of considerable interest. A new series of functionalized spirooxindole linked with 3-acylindole scaffold is reported, starting from chalcones derived from 3-acetyl indole with isatin, and l-4-thiazolidinecarboxylic acid. The reactions proceeded regioselectivity, stereoselectivity, without side products in high yield (71-89%). The new spirooxindole hybrids have been evaluated in vitro for their antiproliferative effects against colon cancer (HCT-116), hepatocellular carcinoma (HepG2) and prostate cancer (PC-3). The selectivity of their activity was evaluated. Some of the synthesized compounds showed considerable anticancer activities. Compound 4k proved to retain a high cytotoxic activity and selectivity against colon cancer cells HCT-116 (IC50 = 7 ± 0.27 µM, SI: 3.7), and HepG2 (IC50 = 5.5 ± 0.2 µM, SI: 4.7) in comparison to (IC50 = 12.6 ± 0.5, SI: 0.4 and 5.5 ± 0.3 µM, SI: 0.9, respectively). Compound 4k was less active (IC50 = 6 ± 0.3 µM, SI: 4.3) than cisplatin (IC50 = 5 ± 0.56 µM, SI: 1.0) but showed greater selectivity towards prostate cancer cells PC-3 in comparison to cisplatin. The details of the binding mode of the active compounds were clarified by molecular docking. Ligand Efficiency (LE) and Ligand Lipophilic Efficiency (LLE) were evaluated and revealed that compound 4k had acceptable value.
Collapse
Affiliation(s)
- Mohammad Shahidul Islam
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Hussien Mansur Ghawas
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | | | - Abdullah Mohammed Al-Majid
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Yaseen A M M Elshaier
- Department of organic and medicinal chemistry, Faculty of Pharmacy, University of Sadat City, Menofia, Egypt
| | - Farid A Badria
- Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Assem Barakat
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia; Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt.
| |
Collapse
|
18
|
Hoveyda HR, Fraser GL, Zoute L, Dutheuil G, Schils D, Brantis C, Lapin A, Parcq J, Guitard S, Lenoir F, Bousmaqui ME, Rorive S, Hospied S, Blanc S, Bernard J, Ooms F, McNelis JC, Olefsky JM. N-Thiazolylamide-based free fatty-acid 2 receptor agonists: Discovery, lead optimization and demonstration of off-target effect in a diabetes model. Bioorg Med Chem 2018; 26:5169-80. [PMID: 30253886 DOI: 10.1016/j.bmc.2018.09.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 09/13/2018] [Accepted: 09/16/2018] [Indexed: 01/14/2023]
Abstract
Free fatty acid-2 (FFA2) receptor is a G-protein coupled receptor of interest in the development of therapeutics in metabolic and inflammatory disease areas. The discovery and optimization of an N-thiazolylamide carboxylic acid FFA2 agonist scaffold is described. Dual key objectives were to i) evaluate the potential of this scaffold for lead optimization in particular with respect to safety de-risking physicochemical properties, i.e. lipophilicity and aromatic content, and ii) to demonstrate the utility of selected lead analogues from this scaffold in a pertinent in vivo model such as oral glucose tolerance test (OGTT). As such, a concomitant improvement in bioactivity together with lipophilic ligand efficiency (LLE) and fraction sp3 content (Fsp3) parameters guided these efforts. Compound 10 was advanced into studies in mice on the basis of its optimized profile vs initial lead 1 (ΔLLE = 0.3, ΔFsp3 = 0.24). Although active in OGTT, 10 also displayed similar activity in the FFA2-knockout mice. Given this off-target OGTT effect, we discontinued development of this FFA2 agonist scaffold.
Collapse
|
19
|
Vimalkumar K, Arun E, Krishna-Kumar S, Poopal RK, Nikhil NP, Subramanian A, Babu-Rajendran R. Occurrence of triclocarban and benzotriazole ultraviolet stabilizers in water, sediment, and fish from Indian rivers. Sci Total Environ 2018; 625:1351-1360. [PMID: 29996432 DOI: 10.1016/j.scitotenv.2018.01.042] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 01/05/2018] [Accepted: 01/05/2018] [Indexed: 05/14/2023]
Abstract
Triclocarban and benzotriazole ultraviolet stabilizers (BUVSs) are listed as high production volume synthetic chemicals, used extensively in personal care products. Many of these chemicals persist in the aquatic environment as micropollutants. Knowledge on their fate in freshwater ecosystems is still lacking, especially in the Indian Rivers. Our intention is to study the seasonal distribution, hazard quotient, risk assessment, and bioaccumulation of triclocarban and BUVSs (UV-9, UV-P, UV-326, UV-327, UV-328, and UV-329) during wet and dry seasons in water, sediment and fish from the Kaveri, Vellar, and Thamiraparani rivers in Tamil Nadu State, India. Triclocarban and BUVSs were identified in all matrices analysed. Triclocarban was found in water, sediment, and fish up to 1119ng/L, 26.3ng/g (dry wt.), and 692ng/g (wet wt.), respectively. Among BUVSs, UV-329 was found up to 31.3ng/L (water samples), UV-327 up to 7.3ng/g (sediment samples), and UV-9 up to 79.4ng/g (fish samples). The hazard quotient (HQenv.) for triclocarban in surface water was found to be at risk level (HQenv. >1) in the Kaveri, and Thamiraparani rivers during dry season. Bioaccumulation factors indicate that target compounds (triclocarban and BUVSs) could bio-accumulate in organisms.
Collapse
Affiliation(s)
- Krishnamoorthi Vimalkumar
- Ecotoxicology and Toxicogenomics Lab, Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Elaiyaraja Arun
- Ecotoxicology and Toxicogenomics Lab, Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Selvaraj Krishna-Kumar
- Ecotoxicology and Toxicogenomics Lab, Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Rama Krishnan Poopal
- Ecotoxicology and Toxicogenomics Lab, Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Nishikant Patil Nikhil
- Ecotoxicology and Toxicogenomics Lab, Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Annamalai Subramanian
- Ecotoxicology and Toxicogenomics Lab, Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Ramaswamy Babu-Rajendran
- Ecotoxicology and Toxicogenomics Lab, Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India.
| |
Collapse
|
20
|
Pimentel L, Fontes AL, Salsinha S, Machado M, Correia I, Gomes AM, Pintado M, Rodríguez-Alcalá LM. Suitable simple and fast methods for selective isolation of phospholipids as a tool for their analysis. Electrophoresis 2018; 39:1835-1845. [PMID: 29518261 DOI: 10.1002/elps.201700425] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 02/14/2018] [Accepted: 02/23/2018] [Indexed: 12/18/2022]
Abstract
Lipids are gaining relevance over the last 20 years, as our knowledge about their role has changed from merely energy/structural molecules to compounds also involved in several biological processes. This led to the creation in 2003 of a new emerging research field: lipidomics. In particular the phospholipids have pharmacological/food applications, participate in cell signalling/homeostatic pathways while their analysis faces some challenges. Their fractionation/purification is, in fact, especially difficult, as they are amphiphilic compounds. Moreover, it usually involves SPE or TLC procedures requiring specific materials hampering their suitableness for routine analysis. Finally, they can interfere with the ionization of other molecules during mass spectrometry analysis. Thus, simple high-throughput reliable methods to selectively isolate these compounds based on the difference between chemical characteristics of lipids would represent valuable tools for their study besides that of other compounds. The current review work aims to describe the state-of-the-art related to the extraction of phospholipids using liquid-liquid methods for their targeted isolation. The technological and biological importance of these compounds and ion suppression phenomena are also reviewed. Methods by precipitation with acetone or isolation using methanol seem to be suitable for selective isolation of phospholipids in both biological and food samples.
Collapse
Affiliation(s)
- Lígia Pimentel
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
- CINTESIS - Centro de Investigação em Tecnologias e Sistemas de Informação em Saúde, Faculdade de Medicina da Universidade do Porto, Portugal
- QOPNA - Unidade de Investigação de Química Orgânica, Produtos Naturais e Agroalimentares, Universidade de Aveiro, Portugal
| | - Ana Luiza Fontes
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Sofia Salsinha
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Manuela Machado
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Inês Correia
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Ana Maria Gomes
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Manuela Pintado
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Luís Miguel Rodríguez-Alcalá
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
- Centro de Investigación en Recursos Naturales y Sustentabilidad (CIRENYS), Universidad Bernardo O'Higgins, Santiago de Chile, Chile
| |
Collapse
|
21
|
Zembrzuska J. Determination of Dodecanol and Short-Chained Ethoxylated Dodecanols by LC-MS/MS (with Electrospray Ionization) After Their Derivatization (with Phenyl Isocyanate). J SURFACTANTS DETERG 2017; 20:1421-32. [PMID: 29200813 DOI: 10.1007/s11743-017-2015-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 08/23/2017] [Indexed: 11/02/2022]
Abstract
Abstract This report describes the application of LC-MS/MS for the separation of dodecanol (C12OH) and homogenous fatty alcohols ethoxylated (AE) containing a dodecyl moiety and 1-9 ethoxy groups. These ethoxylates and free alcohol were derivatized for LC-MS/MS analysis with phenyl isocyanate (PIC). The derivatives of analytes with PIC were separated using a C18 column. Gradient elution with a mixture of ethyl acetate and acetonitrile (5 mM) was employed. The described determination method is characterized by low detection limits (range from 0.005 µg L-1 for: C12OH, C12EO2-7 to 1 µg L-1 for C12EO1) and quantification limits (range from 0.01 µg L-1 for: C12EO5-7 to 2 µg L-1 for C12EO1). The developed and validated method was used in combination with liquid-liquid extraction (using ethyl acetate) in order to identify and quantitatively determine the C12OH and C12EO1-9 present in environmental samples collected from Warta river water in Poznan. Graphical abstract
Collapse
|
22
|
Bussy U, Wassink L, Scribner KT, Li W. Determination of cortisol in lake sturgeon (Acipenser fulvescens) eggs by liquid chromatography tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1040:162-8. [PMID: 27984758 DOI: 10.1016/j.jchromb.2016.11.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/17/2016] [Accepted: 11/18/2016] [Indexed: 11/21/2022]
Abstract
Quantifying cortisol concentrations in fish eggs is important to understand the effects of environmental conditions on maternal physiological condition and on egg provisioning and quality. Data are particularly relevant to studies of the ecology of threatened species such as lake sturgeon (Aciperser fulvescens) as well as assessments of larval physical and behavioral phenotypes, fish health and caviar quality in sturgeon aquaculture. This study focuses on development of bioanalytical methods for high sensitivity and robust determination of cortisol in sturgeon eggs. Sample preparation was optimized after investigating protein precipitation and liquid-liquid extraction techniques. Ethyl acetate was found to be the most efficient solvent (recovery parameter) and also provided the best sample clean up (matrix effect parameter). The method was determined to be linear for cortisol concentrations between 0.025 and 100ng/mL. The limits of detection and quantification were 0.025 and 0.1ng/mL respectively. Intra- and inter-day performances of the method were validated at three concentrations (0.25; 10 and 100ng/mL). The method was applied to field-collected samples for the determination of endogenous cortisol in lake sturgeon eggs. Cortisol was detected in all egg samples and statistical analysis showed significant differences between fertilized and non-fertilized eggs.
Collapse
|
23
|
McCoull W, Hennessy EJ, Blades K, Chuaqui C, Dowling JE, Ferguson AD, Goldberg FW, Howe N, Jones CR, Kemmitt PD, Lamont G, Varnes JG, Ward RA, Yang B. Optimization of Highly Kinase Selective Bis-anilino Pyrimidine PAK1 Inhibitors. ACS Med Chem Lett 2016; 7:1118-1123. [PMID: 27994749 DOI: 10.1021/acsmedchemlett.6b00322] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 09/14/2016] [Indexed: 12/26/2022] Open
Abstract
Group I p21-activated kinase (PAK) inhibitors are indicated as important in cancer progression, but achieving high kinase selectivity has been challenging. A bis-anilino pyrimidine PAK1 inhibitor was identified and optimized through structure-based drug design to improve PAK1 potency and achieve high kinase selectivity, giving in vitro probe compound AZ13705339 (18). Reduction of lipophilicity to lower clearance afforded AZ13711265 (14) as an in vivo probe compound with oral exposure in mouse. Such probes will allow further investigation of PAK1 biology.
Collapse
Affiliation(s)
- William McCoull
- AstraZeneca, 310 Cambridge Science Park, Milton
Road, Cambridge, CB4 0WG, U.K
| | - Edward J. Hennessy
- AstraZeneca, Gatehouse Park, Waltham, Massachusetts 02451, United States
| | - Kevin Blades
- AstraZeneca, Alderley Park,
Macclesfield, Cheshire, SK10 4TG, U.K
| | - Claudio Chuaqui
- AstraZeneca, Gatehouse Park, Waltham, Massachusetts 02451, United States
| | - James E. Dowling
- AstraZeneca, Gatehouse Park, Waltham, Massachusetts 02451, United States
| | - Andrew D. Ferguson
- AstraZeneca, Gatehouse Park, Waltham, Massachusetts 02451, United States
| | | | - Nicholas Howe
- AstraZeneca, Alderley Park,
Macclesfield, Cheshire, SK10 4TG, U.K
| | | | - Paul D. Kemmitt
- AstraZeneca, 310 Cambridge Science Park, Milton
Road, Cambridge, CB4 0WG, U.K
| | - Gillian Lamont
- AstraZeneca, 310 Cambridge Science Park, Milton
Road, Cambridge, CB4 0WG, U.K
| | - Jeffrey G. Varnes
- AstraZeneca, Gatehouse Park, Waltham, Massachusetts 02451, United States
| | - Richard A. Ward
- AstraZeneca, 310 Cambridge Science Park, Milton
Road, Cambridge, CB4 0WG, U.K
| | - Bin Yang
- AstraZeneca, Gatehouse Park, Waltham, Massachusetts 02451, United States
| |
Collapse
|
24
|
Handlon AL, Schaller LT, Leesnitzer LM, Merrihew RV, Poole C, Ulrich JC, Wilson JW, Cadilla R, Turnbull P. Optimizing Ligand Efficiency of Selective Androgen Receptor Modulators (SARMs). ACS Med Chem Lett 2016; 7:83-8. [PMID: 26819671 PMCID: PMC4716610 DOI: 10.1021/acsmedchemlett.5b00377] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 11/19/2015] [Indexed: 12/25/2022] Open
Abstract
A series of selective androgen receptor modulators (SARMs) containing the 1-(trifluoromethyl)benzyl alcohol core have been optimized for androgen receptor (AR) potency and drug-like properties. We have taken advantage of the lipophilic ligand efficiency (LLE) parameter as a guide to interpret the effect of structural changes on AR activity. Over the course of optimization efforts the LLE increased over 3 log units leading to a SARM 43 with nanomolar potency, good aqueous kinetic solubility (>700 μM), and high oral bioavailability in rats (83%).
Collapse
Affiliation(s)
- Anthony L. Handlon
- Metabolic Pathways Cardiovascular
Unit and Platform Technology & Science, GlaxoSmithKline, 709
Swedeland Road, King of Prussia, Pennsylvania 19406-0939, United States
| | - Lee T. Schaller
- Metabolic Pathways Cardiovascular
Unit and Platform Technology & Science, GlaxoSmithKline, 709
Swedeland Road, King of Prussia, Pennsylvania 19406-0939, United States
| | | | - Raymond V. Merrihew
- Metabolic Pathways Cardiovascular
Unit and Platform Technology & Science, GlaxoSmithKline, 709
Swedeland Road, King of Prussia, Pennsylvania 19406-0939, United States
| | - Chuck Poole
- Metabolic Pathways Cardiovascular
Unit and Platform Technology & Science, GlaxoSmithKline, 709
Swedeland Road, King of Prussia, Pennsylvania 19406-0939, United States
| | - John C. Ulrich
- Metabolic Pathways Cardiovascular
Unit and Platform Technology & Science, GlaxoSmithKline, 709
Swedeland Road, King of Prussia, Pennsylvania 19406-0939, United States
| | - Joseph W. Wilson
- Metabolic Pathways Cardiovascular
Unit and Platform Technology & Science, GlaxoSmithKline, 709
Swedeland Road, King of Prussia, Pennsylvania 19406-0939, United States
| | - Rodolfo Cadilla
- Metabolic Pathways Cardiovascular
Unit and Platform Technology & Science, GlaxoSmithKline, 709
Swedeland Road, King of Prussia, Pennsylvania 19406-0939, United States
| | | |
Collapse
|
25
|
Han X, Liu R, Ji L, Hui M, Li Q, Fang L, Bi K. Determination of tulobuterol in rat plasma using a liquid chromatography-tandem mass spectrometry method and its application to a pharmacokinetic study of tulobuterol patch. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1008:108-14. [PMID: 26638035 DOI: 10.1016/j.jchromb.2015.11.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 11/09/2015] [Accepted: 11/12/2015] [Indexed: 11/23/2022]
Abstract
A sensitive and accurate liquid chromatography-tandem mass spectrometry (LC-MS/MS) method has been developed and validated for determination of tulobuterol in rat plasma for the first time. Plasma samples were extracted by liquid-liquid extraction method with methyl tert-butyl ether and the analyte and clenbuterol (IS) were separated on a Venusil MP C18 column (100mm×2.1mm, 3μm) using 0.1% formic acid-water-methanol as mobile phase, with a runtime of 5min. The analyte was detected in multiple reaction monitoring (MRM) mode with positive electrospray ionization. Transitions of m/z 228.2→154.0 for tulobuterol and m/z 277.1→203.0 for the clenbuterol were monitored. The linear range was 0.5-100ng/ml (r=0.9967) for tulobuterol with the lower limit of quantitation of 0.5ng/ml. The intra-day and inter-day precisions were less than 10.3% for the analyte and the accuracy was less than -8.6%. The RSD of matrix effect and recovery yield were within ±15% of nominal concentrations and tulobuterol was stable during stability studies. The validated method has been successfully applied to a pharmacokinetic study of three doses of tulobuterol patch in rats for the first time.
Collapse
|
26
|
Watanabe M, Kasai M, Tomizawa H, Aoki M, Eiho K, Isobe Y, Asano S. Dihydropyrrolo[2,3-d]pyrimidines: Selective Toll-Like Receptor 9 Antagonists from Scaffold Morphing Efforts. ACS Med Chem Lett 2014; 5:1235-9. [PMID: 25408837 DOI: 10.1021/ml5003184] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 10/02/2014] [Indexed: 12/13/2022] Open
Abstract
Toll-like receptors (TLRs) play important roles in the innate immune system. In fact, recognition of endogenous immune complexes containing self-nucleic acids as pathogen- or damage-associated molecular patterns contributes to certain autoimmune diseases, and inhibition of these recognition signals is expected to have therapeutic value. We identified dihydropyrrolo[2,3-d]pyrimidines as novel selective TLR9 antagonists with high aqueous solubility. A structure-activity relationship study of a known TLR9 antagonist led to the promising compound 18, which showed potent TLR9 antagonistic activity, sufficient aqueous solubility for parenteral formulation, and druggable properties. Compound 18 suppressed the production of the proinflammatory cytokine IL-6 in CpG-induced mouse model. It is therefore believed that compound 18 has great potential in the treatment of TLR9-mediated systemic uncontrollable inflammatory response like sepsis.
Collapse
Affiliation(s)
- Manabu Watanabe
- Sumitomo Dainippon Pharma Co., Ltd., 3-1-98 Kasugade Naka, Konohana-ku, Osaka 554-0022, Japan
| | - Mai Kasai
- Sumitomo Dainippon Pharma Co., Ltd., 3-1-98 Kasugade Naka, Konohana-ku, Osaka 554-0022, Japan
| | - Hideyuki Tomizawa
- Sumitomo Dainippon Pharma Co., Ltd., 3-1-98 Kasugade Naka, Konohana-ku, Osaka 554-0022, Japan
| | - Masamitsu Aoki
- Sumitomo Dainippon Pharma Co., Ltd., 3-1-98 Kasugade Naka, Konohana-ku, Osaka 554-0022, Japan
| | - Kazuo Eiho
- Sumitomo Dainippon Pharma Co., Ltd., 3-1-98 Kasugade Naka, Konohana-ku, Osaka 554-0022, Japan
| | - Yoshiaki Isobe
- Sumitomo Dainippon Pharma Co., Ltd., 3-1-98 Kasugade Naka, Konohana-ku, Osaka 554-0022, Japan
| | - Shigehiro Asano
- Sumitomo Dainippon Pharma Co., Ltd., 33-94 Enoki-cho, Suita, Osaka 564-0053, Japan
| |
Collapse
|
27
|
Mishra P, Dasar P, N S, Kumar S, Chand BR, Airen B, Jain D, Warekar S. Dental Camp Experience in Lifeline Express ( LLE) Train among Rural Population of Central, India. J Clin Diagn Res 2014; 8:ZC72-4. [PMID: 25584322 PMCID: PMC4290333 DOI: 10.7860/jcdr/2014/11378.5157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 10/14/2014] [Indexed: 11/24/2022]
Abstract
INTRODUCTION The lifeline express is the world's first hospital train. To date, over 800,000 patients living in the remote rural interiors of India where medical facilities are scarce, have been treated. OBJECTIVE To evaluate the application and feasibility of providing screening, diagnosis, preventive dental treatment for rural population through mobile dental unit in lifeline express train from last three years in Madhya Pradesh, India. MATERIALS AND METHODS The study was retrospective and the data was extracted from six dental camps which have been conducted by Life line Express/ Impact India foundation in between 2011 to 2013 in rural and remote area of Madhya Pradesh. RESULTS Out of six dental camps 14,081 patients were registered and 6,526 received dental treatment. The type of dental treatment like extractions (3,441), scaling (2,119) and restoration (966) were performed. CONCLUSION The study shows a mobile dental hospital like LLE can provide an excellent opportunity for rural populations regarding oral health care.
Collapse
Affiliation(s)
- Prashant Mishra
- Reader, Department of Public Health Dentistry, Sri Aurobindo College of Dentistry, Indore (M.P.), India
| | - Pralhad Dasar
- Professor and Head, Department of Public Health Dentistry, Sri Aurobindo College of Dentistry, Indore (M.P.), India
| | - Sandesh N
- Reader, Department of Public Health Dentistry, Sri Aurobindo College of Dentistry, Indore (M.P), India
| | - Sandeep Kumar
- Senior Lecturer, Department of Public Health Dentistry, Sri Aurobindo College of Dentistry, Indore (M.P.), India
| | - Binti Rani Chand
- Post Graduate Student, Department of Pedodontics and Preventive Dentistry, Sri Aurobindo College of Dentistry, Indore (M.P.), India
| | - Bhuvnesh Airen
- Post Graduate Student, Department of Public Health Dentistry, Sri Aurobindo College of Dentistry, Indore (M.P.), India
| | - Deepika Jain
- Post Graduate Student, Department of Public Health Dentistry, Sri Aurobindo College of Dentistry, Indore (M.P.), India
| | - Shilpa Warekar
- Post Graduate Student, Department of Public Health Dentistry, Sri Aurobindo College of Dentistry, Indore (M.P.), India
| |
Collapse
|
28
|
Mohapatra DP, Brar SK, Tyagi RD, Picard P, Surampalli RY. Analysis and advanced oxidation treatment of a persistent pharmaceutical compound in wastewater and wastewater sludge-carbamazepine. Sci Total Environ 2014; 470-471:58-75. [PMID: 24140682 DOI: 10.1016/j.scitotenv.2013.09.034] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 09/12/2013] [Accepted: 09/12/2013] [Indexed: 05/22/2023]
Abstract
Pharmaceutically active compounds (PhACs) are considered as emerging environmental problem due to their continuous input and persistence to the aquatic ecosystem even at low concentrations. Among them, carbamazepine (CBZ) has been detected at the highest frequency, which ends up in aquatic systems via wastewater treatment plants (WWTPs) among other sources. The identification and quantification of CBZ in wastewater (WW) and wastewater sludge (WWS) is of major interest to assess the toxicity of treated effluent discharged into the environment. Furthermore, WWS has been subjected for re-use either in agricultural application or for the production of value-added products through the route of bioconversion. However, this field application is disputable due to the presence of these organic compounds and in order to protect the ecosystem or end users, data concerning the concentration, fate, behavior as well as the perspective of simultaneous degradation of these compounds is urgently necessary. Many treatment technologies, including advanced oxidation processes (AOPs) have been developed in order to degrade CBZ in WW and WWS. AOPs are technologies based on the intermediacy of hydroxyl and other radicals to oxidize recalcitrant, toxic and non-biodegradable compounds to various by-products and eventually to inert end products. The purpose of this review is to provide information on persistent pharmaceutical compound, carbamazepine, its ecological effects and removal during various AOPs of WW and WWS. This review also reports the different analytical methods available for quantification of CBZ in different contaminated media including WW and WWS.
Collapse
Affiliation(s)
- D P Mohapatra
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada
| | - S K Brar
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada.
| | - R D Tyagi
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada
| | - P Picard
- Phytronix Technologies, 4535 Boulevard Wilfrid Hamel, Québec G1P 2J7, Canada
| | - R Y Surampalli
- US Environmental Protection Agency, P.O. Box 17-2141, Kansas City, KS 66117, USA
| |
Collapse
|
29
|
Hochman E, Krivoy A, Shoval G, Valevski A, Weizman A, Fischel T. Acute manic episode is associated with an increased risk of lower limb edema. Prog Neuropsychopharmacol Biol Psychiatry 2013; 47:99-103. [PMID: 23994661 DOI: 10.1016/j.pnpbp.2013.08.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Revised: 08/15/2013] [Accepted: 08/21/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Lower limb edema (LLE) was suggested to be associated with the use of psychotropic drugs among patients suffering from severe mental illnesses; however no direct mechanism was found. Therefore, we examined the association between the occurrence of LLE and acute untreated episode leading to hospitalization. METHODS A retrospective cross-sectional study was conducted using medical charts of 2529 patients admitted to Geha Mental Health Center between 2002 and 2012. Incident cases of LLE, demographic and clinical data were retrieved. Admission clinical status was modeled as three non-overlapping groups of patients: (i) Patients with a non-affective psychosis (NAP) episode (n = 1563), (ii) patients with a manic episode (n = 366), and (iii) patients with a depressive episode (n = 600). We performed a logistic regression analysis with LLE as the dependent variable controlling for the demographic and clinical variables that may be associated with LLE. RESULTS LLE was diagnosed in 3.8% (n = 95) of the study population. The rate of LLE was 3-fold higher (χ(2) = 51.9, df = 2, p<0.001) in patients admitted with a manic episode (n = 38; 10.4%) compared to patients admitted with a NAP episode (n = 41; 2.6%) and patients admitted with a depressive episode (n = 16; 2.7%). Manic episode was associated with an increased risk for LLE compared to depressive episode (OR 8.72, 95% CI: 3.53-21.52, p<0.001) or NAP episode (OR 3.96, 95% CI: 2.16-7.26, p<0.001) after controlling for relevant confounders. CONCLUSION Acute manic episode, leading to hospitalization, is associated with an increased risk of LLE, compared to NAP or depressive episode, suggesting causal relationship between mood and fluid imbalance. Yet, future prospective studies are needed to rule out the contribution of physical agitation and lithium treatment.
Collapse
Affiliation(s)
- Eldar Hochman
- Geha Mental Health Center, Petach-Tikva, Israel; Sackler's Faculty of Medicine, Tel-Aviv University, Ramat-Aviv, Israel.
| | | | | | | | | | | |
Collapse
|
30
|
Kalogera E, Pistos C, Provatopoulou X, Athanaselis S, Spiliopoulou C, Gounaris A. Androgen glucuronides analysis by liquid chromatography tandem-mass spectrometry: could it raise new perspectives in the diagnostic field of hormone-dependent malignancies? J Chromatogr B Analyt Technol Biomed Life Sci 2013; 940:24-34. [PMID: 24140653 DOI: 10.1016/j.jchromb.2013.09.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 08/09/2013] [Accepted: 09/18/2013] [Indexed: 01/14/2023]
Abstract
Breast and prostate constitute organs of intense steroidogenic activity. Clinical and epidemiologic data provide strong evidence on the influence of androgens and estrogens on the risk of typical hormone-dependent malignancies, like breast and prostate cancer. Recent studies have focused on the role of androgen metabolites in regulating androgen concentrations in hormone-sensitive tissues. Steroid glucuronidation has been suggested to have a prominent role in controlling the levels and the biological activity of unconjugated androgens. It is well-established that serum levels of androgen glucuronides reflect androgen metabolism in androgen-sensitive tissues. Quantitative analysis of androgen metabolites in blood specimens is the only minimally invasive approach permitting an accurate estimate of the total pool of androgens. During the past years, androgen glucuronides analysis most often involved radioimmunoassays (RIA) or direct immunoassays, both methods bearing serious limitations. However, recent impressive technical advances in mass spectrometry, and particularly in high performance liquid chromatography coupled with mass spectrometry (LC-MS/MS), have overcome these drawbacks enabling the simultaneous, quantitative analysis of multiple steroids even at low concentrations. Blood androgen profiling by LC-MS/MS, a robust and reliable technique of high selectivity, sensitivity, specificity, precision and accuracy emerges as a promising new approach in the study of human pathology. The present review offers a contemporary insight in androgen glucuronides profiling through the application of LC-MS/MS, highlighting new perspectives in the study of steroids and their implication in hormone-dependent malignancies.
Collapse
|
31
|
Broccardo CJ, Schauer KL, Kohrt WM, Schwartz RS, Murphy JP, Prenni JE. Multiplexed analysis of steroid hormones in human serum using novel microflow tile technology and LC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 934:16-21. [PMID: 23891914 PMCID: PMC4391816 DOI: 10.1016/j.jchromb.2013.06.031] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 06/26/2013] [Accepted: 06/27/2013] [Indexed: 10/26/2022]
Abstract
A novel microfluidic chromatography device coupled with tandem mass spectrometry (LC-MS/MS) was utilized for the multiplex analysis of 5 steroids (testosterone, dihydrotestosterone, progesterone, cortisol, cortisone) in human serum. The use of microfluidics allowed for reduction of the chromatographic flow rate to 3μl/min with overall method run times comparable to standard flow LC-MS/MS methods reported in the literature, corresponding to a 150 fold decrease in solvent consumption. Furthermore, a simple sample preparation protocol was employed requiring injection of only 0.5μl of sample, corresponding to a 100-400 fold increase in on-column sensitivity as compared to published standard flow assays. The measured LOQ for both testosterone and progesterone was 0.4ng/mL, representing an improvement over reported literature values obtained by standard flow methods employing comparable sample preparation and large injection volumes. The LOQs for cortisol (1.9ng/mL), cortisone (0.3ng/mL), and dihydrotestosterone (1.4ng/mL) were all within a biologically relevant range. A comparison of clinical serum samples was performed for the analysis of testosterone using this microfluidic LC-MS/MS assay and the Beckman Access II automated antibody-based measurement system. The immunoassay results were systematically higher due to matrix interference which was easily resolved with the increased chromatographic resolution obtained in the microflow LC-MS/MS assay.
Collapse
Affiliation(s)
- Carolyn J. Broccardo
- Colorado State University, Proteomics and Metabolomics Facility, 2021 Campus Delivery, Fort Collins, CO 80523, USA
| | - Kevin L. Schauer
- Colorado State University, Proteomics and Metabolomics Facility, 2021 Campus Delivery, Fort Collins, CO 80523, USA
| | - Wendy M. Kohrt
- University of Colorado Anschutz Medical Campus, Division of Geriatric Medicine, Mail Stop B179, 12631 East 17th Avenue, Aurora, CO 80045, USA
| | - Robert S. Schwartz
- University of Colorado Anschutz Medical Campus, Division of Geriatric Medicine, Mail Stop B179, 12631 East 17th Avenue, Aurora, CO 80045, USA
| | | | - Jessica E. Prenni
- Colorado State University, Proteomics and Metabolomics Facility, 2021 Campus Delivery, Fort Collins, CO 80523, USA
| |
Collapse
|
32
|
Jian W, Edom RW, Xue X, Huang MQ, Fourie A, Weng N. Quantitation of leukotriene B(4) in human sputum as a biomarker using UPLC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 932:59-65. [PMID: 23831697 DOI: 10.1016/j.jchromb.2013.06.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 06/03/2013] [Accepted: 06/07/2013] [Indexed: 11/17/2022]
Abstract
Leukotriene B4 (LTB4) is a potent mediator of inflammation and has been recognized as an important target for therapeutic intervention for treatment of diseases such as asthma. In the current work, a highly selective and sensitive UPLC-MS/MS assay was developed for quantitation of LTB4 in human sputum as a biomarker for LTB4 biosynthesis inhibition. A fit-for-purpose strategy for method development, assay qualification, and study support was adopted for this biomarker project. A surrogate matrix (protein buffer) was used for preparation of calibration samples and certain levels of quality control (QC) samples to avoid interference from endogenous analyte, while the low QC was prepared in authentic matrix, human sputum. The analytical methodology utilized a liquid-liquid extraction procedure in 96-well plate format. Chromatographic separation was achieved with a reversed-phase ultra high pressure liquid chromatography (UPLC) column using gradient elution, and the run time was 4.5min per sample. The lower limit of quantitation (LLOQ) was 0.2ng/mL, and the calibration curve range was 0.2-20ng/mL. Acceptable accuracy, precision, linearity, specificity, recovery, and matrix effect was obtained. Bench-top stability (6h), freeze-thaw stability (3 cycles at -20°C), and autosampler stability (97h at ambient temperature) all met acceptance criteria. Frozen long-term stability for 166 days at -20°C in sputum did not meet acceptance criteria by showing only ≥75% of nominal concentration and the information was taken into consideration for study support. Two important observations in the current work were: (1) LTB4 was unstable in sputum in the presence of liquification reagent dithiothreitol (DTT). Therefore, a non-DTT treatment method for sputum processing was developed and applied to the bioanalytical assay and clinical study support; and (2) chromatographic separation of LTB4 from its three non-enzymatically derived isomers, i.e. 6-trans-LTB4, 12-epi-LTB4, and 6-trans-12-epi-LTB4, was achieved. This assay was successfully applied to a Phase II clinical study for proof-of-concept of a LTA4 hydrolase inhibitor for treatment of asthma.
Collapse
Affiliation(s)
- Wenying Jian
- Drug Safety Sciences, Janssen Research & Development, Johnson & Johnson, Raritan, NJ 08869, USA.
| | | | | | | | | | | |
Collapse
|
33
|
Rajendra Acharya U, Faust O, Adib Kadri N, Suri JS, Yu W. Automated identification of normal and diabetes heart rate signals using nonlinear measures. Comput Biol Med 2013; 43:1523-9. [PMID: 24034744 DOI: 10.1016/j.compbiomed.2013.05.024] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 05/28/2013] [Accepted: 05/30/2013] [Indexed: 11/22/2022]
Abstract
Diabetes mellitus (DM) affects considerable number of people in the world and the number of cases is increasing every year. Due to a strong link to the genetic basis of the disease, it is extremely difficult to cure. However, it can be controlled to prevent severe consequences, such as organ damage. Therefore, diabetes diagnosis and monitoring of its treatment is very important. In this paper, we have proposed a non-invasive diagnosis support system for DM. The system determines whether or not diabetes is present by determining the cardiac health of a patient using heart rate variability (HRV) analysis. This analysis was based on nine nonlinear features namely: Approximate Entropy (ApEn), largest Lyapunov exponet (LLE), detrended fluctuation analysis (DFA) and recurrence quantification analysis (RQA). Clinically significant measures were used as input to classification algorithms, namely AdaBoost, decision tree (DT), fuzzy Sugeno classifier (FSC), k-nearest neighbor algorithm (k-NN), probabilistic neural network (PNN) and support vector machine (SVM). Ten-fold stratified cross-validation was used to select the best classifier. AdaBoost, with least squares (LS) as weak learner, performed better than the other classifiers, yielding an average accuracy of 90%, sensitivity of 92.5% and specificity of 88.7%.
Collapse
|
34
|
Olkowska E, Polkowska Ż, Namieśnik J. A solid phase extraction-ion chromatography with conductivity detection procedure for determining cationic surfactants in surface water samples. Talanta 2013; 116:210-6. [PMID: 24148395 DOI: 10.1016/j.talanta.2013.04.083] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 04/20/2013] [Accepted: 04/24/2013] [Indexed: 10/26/2022]
Abstract
A new analytical procedure for the simultaneous determination of individual cationic surfactants (alkyl benzyl dimethyl ammonium chlorides) in surface water samples has been developed. We describe this methodology for the first time: it involves the application of solid phase extraction (SPE-for sample preparation) coupled with ion chromatography-conductivity detection (IC-CD-for the final determination). Mean recoveries of analytes between 79% and 93%, and overall method quantification limits in the range from 0.0018 to 0.038 μg/mL for surface water and CRM samples were achieved. The methodology was applied to the determination of individual alkyl benzyl quaternary ammonium compounds in environmental samples (reservoir water) and enables their presence in such types of waters to be confirmed. In addition, it is a simpler, less time-consuming, labour-intensive, avoiding use of toxic chloroform and significantly less expensive methodology than previously described approaches (liquid-liquid extraction coupled with liquid chromatography-mass spectrometry).
Collapse
Affiliation(s)
- Ewa Olkowska
- Department of Analytical Chemistry, Chemical Faculty, Gdansk University of Technology (GUT), G. Narutowicza 11/12, 80-233 Gdańsk, Poland.
| | | | | |
Collapse
|
35
|
Ravikumar K, Chandu BR, Challa BR, Chandrasekhar KB. Method development and validation of almotriptan in human plasma by HPLC tandem mass spectrometry: application to pharmacokinetic study. Sci Pharm 2012; 80:367-78. [PMID: 22896823 PMCID: PMC3383208 DOI: 10.3797/scipharm.1112-01] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 02/27/2012] [Indexed: 11/25/2022] Open
Abstract
A simple, sensitive and selective method has been developed for quantification of Almotriptan (AL) in human plasma using Almotriptan-d(6) (ALD6) as an internal standard. Almotriptan and Almotriptan-d(6) were detected with proton adducts at m/z 336.1→201.1 and 342.2→207.2 in multiple reaction monitoring (MRM) positive mode, respectively. The method was linear over a concentration range of 0.5-150.0 ng/mL. The limit of detection (LOD) and limit of quantification (LOQ) for Almotriptan were 0.2 pg/mL and 0.5 ng/mL, respectively. Liquid-liquid extraction was used followed by MS/MS (ion spray). The method was shown to be precise with an average within-run and between-run variation of 0.68 to 2.78% and 0.57 to 0.86%, respectively. The average within-run and between-run accuracy of the method throughout its linear range was 98.94 to 102.64% and 99.43 to 101.44%, respectively. The mean recovery of drug and internal standard from human plasma was 92.12 ± 4.32% and 89.62 ± 6.32%. It can be applied for clinical and pharmacokinetic studies.
Collapse
Affiliation(s)
- Konda Ravikumar
- Hindu college of Pharmacy, Amaravathi Road, Guntur, Andhrapradesh, 522002, India
- Jawaharlal Nehru Technological University, Anantapur, 515002, India
| | - Babu Rao Chandu
- Donbosco college of Pharmacy, Pulladigunta, Guntur, 522201, India
| | | | | |
Collapse
|