scholarly journals Microscopic Mass Spectrometry Imaging Reveals the Distribution of Phytochemicals in the Dried Root of Isatis tinctoria

2021 ◽  
Vol 12 ◽  
Author(s):  
Li-Xing Nie ◽  
Jing Dong ◽  
Lie-Yan Huang ◽  
Xiu-Yu Qian ◽  
Chao-Jie Lian ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectrometry Imaging ◽  
Viral Infections ◽  
Ion Trap ◽  
Partial Least Square ◽  
Least Square ◽  
Isatis Tinctoria ◽  
Chinese Medicines ◽  
Flight Mass Spectrometry ◽  
First Time

The dried root of Isatis tinctoria L. (Brassicaceae) is one of the most popular traditional Chinese medicines with well-recognized prevention and treatment effects against viral infections. Above 300 components have been isolated from this herb, but their spatial distribution in the root tissue remains unknown. In recent years, mass spectrometry imaging (MSI) has become a booming technology for capturing the spatial accumulation and localization of molecules in fresh plants, animal, or human tissues. However, few studies were conducted on the dried herbal materials due to the obstacles in cryosectioning. In this study, distribution of phytochemicals in the dried root of Isatis tinctoria was revealed by microscopic mass spectrometry imaging, with application of atmospheric pressure–matrix-assisted laser desorption/ionization (AP-MALDI) and ion trap–time-of-flight mass spectrometry (IT-TOF/MS). After optimization of the slice preparation and matrix application, 118 ions were identified without extraction and isolation, and the locations of some metabolites in the dried root of Isatis tinctoria were comprehensively visualized for the first time. Combining with partial least square (PLS) regression, samples collected from four habitats were differentiated unambiguously based on their mass spectrometry imaging.

scholarly journals Metabolomics of Ginger Based on Ultra-Performance Liquid Chromatography Coupled with Quadrupole Time-of-Flight Mass Spectrometry Technology

2020 ◽  
Author(s):  
Hui Yan ◽  
Dongqian Zou ◽  
Guisheng Zhou ◽  
Hanwen Yu ◽  
Penghui Li ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Quality Evaluation ◽  
Time Of Flight ◽  
Ultra Performance Liquid Chromatography ◽  
Partial Least Square ◽  
Least Square ◽  
Related Factors ◽  
Flight Mass Spectrometry ◽  
Mass Spectrometry Technology

Abstract Objectives Dried ginger and ginger are the same type of medicine and food. The differential components of ginger and dried ginger, dried ginger and ginger charcoal were investigated. Materials and Methods The experimental materials were divided into three sample groups: the ginger group, dried ginger group and ginger charcoal group. The ginger group, dried ginger group and ginger charcoal group were qualitatively analyzed by ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS/MS). The data were processed by Marker View Software. Principal component analysis (PCA) and orthogonal partial least-square discriminant analysis (OPLS-DA) were performed with SIMCA 13.0 Software. The differential components of the ginger group and dried ginger group as well as the dried ginger group and ginger charcoal group with a VIP>2 (p<0.05), were identified with PeakView 1.2 Software. Results Ten differential components, including 6-gingerol, 8-gingerol and 10-gingerol, were identified between the ginger group and dried ginger group; 13 differential components, including 6-shogaol, 10-gingerol and zingiberone, were identified between the dried ginger group and ginger charcoal group. Conclusions The main differential components between the ginger group and dried ginger group, dried ginger group and ginger charcoal group were gingerols and diphenylheptanes. Based on metabolomics analysis of the chemical composition of ginger medicinal materials, effects and other related factors, it is recommended that 6-gingerol, 6-shogaol and zingiberone should be used as indicative components for the respective quality evaluation of ginger, dried ginger and ginger charcoal. The results of this study may provide a basis for the reasonable quality evaluation of ginger medicinal materials.

scholarly journals Salmonella Typhi and Salmonella Paratyphi A elaborate distinct systemic metabolite signatures during enteric fever

eLife ◽  
2014 ◽  
Vol 3 ◽  
Author(s):  
Elin Näsström ◽  
Nga Tran Vu Thieu ◽  
Sabina Dongol ◽  
Abhilasha Karkey ◽  
Phat Voong Vinh ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Bacterial Infections ◽  
Enteric Fever ◽  
Salmonella Typhi ◽  
Two Dimensional ◽  
Flight Mass Spectrometry ◽  
Metabolite Profiles ◽  
Diagnostic Approaches ◽  
First Time

The host–pathogen interactions induced by Salmonella Typhi and Salmonella Paratyphi A during enteric fever are poorly understood. This knowledge gap, and the human restricted nature of these bacteria, limit our understanding of the disease and impede the development of new diagnostic approaches. To investigate metabolite signals associated with enteric fever we performed two dimensional gas chromatography with time-of-flight mass spectrometry (GCxGC/TOFMS) on plasma from patients with S. Typhi and S. Paratyphi A infections and asymptomatic controls, identifying 695 individual metabolite peaks. Applying supervised pattern recognition, we found highly significant and reproducible metabolite profiles separating S. Typhi cases, S. Paratyphi A cases, and controls, calculating that a combination of six metabolites could accurately define the etiological agent. For the first time we show that reproducible and serovar specific systemic biomarkers can be detected during enteric fever. Our work defines several biologically plausible metabolites that can be used to detect enteric fever, and unlocks the potential of this method in diagnosing other systemic bacterial infections.

scholarly journals PENGARUH FAKTOR PERSONAL TERHADAP KOMITMEN ORGANISASIONAL GURU MADRASAH

QUALITY ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 1
Author(s):  
Rofiq Faudy Akbar
Keyword(s):  
Organizational Commitment ◽  
Psychological Contract ◽  
Structural Equation ◽  
Partial Least Square ◽  
Least Square ◽  
Equation Modeling ◽  
Job Choice ◽  
Personal Factors ◽  
Central Java ◽  
First Time

<p><em>This study aims to examine the influence of personal factors on organizational commitment. Personal factors in this study are interpreted with job choice factor, expectancy, and psychological contract variables. Research respondents were private madrasa teachers in the Central Java Indonesia. Data analysis using structural equation modeling partial least square shows that personal factors have a positive and significant effect on teacher organizational commitment. Job choice factor is the consideration of the applicant the first time someone decides to work as a teacher. Individuals have evaluated salary, the nature of the type of work as an educator, as well as long-term prospects such as the possibility to become permanent teachers of a madrasa / school and the opportunity to get certified. Teachers have expectations regarding financial and non-financial compensation and hope the head of the madrasa or foundation provides reciprocity or appreciation for their sacrifice to the organization. Teachers always expect a positive response from the </em><em> </em><em>head of the madrasa/foundation, as their workload increases. Positive responses from the head of the madrasa/foundation provided their commitment to work and organization will always increase</em><em>, c</em><em>onversely</em><em>.</em><em> </em></p><p> </p>

scholarly journals Metabolic profiling putatively identifies plasma biomarkers of male infertility using UPLC-ESI-IT-TOFMS

RSC Advances ◽  
2018 ◽  
Vol 8 (46) ◽  
pp. 25974-25982 ◽  
Author(s):  
F. J. Zeng ◽  
H. C. Ji ◽  
Z. M. Zhang ◽  
J. K. Luo ◽  
H. M. Lu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Male Infertility ◽  
Electrospray Ionization ◽  
Metabolic Profiling ◽  
Ion Trap ◽  
Time Of Flight ◽  
Ultra Performance Liquid Chromatography ◽  
Flight Mass Spectrometry ◽  
Potential Biomarkers

Ultra-performance liquid chromatography-electrospray ionization-ion trap-time of flight mass spectrometry combined with chemometrics methods was used to discover potential biomarkers of male infertility based on untargeted plasma metabolomics.

scholarly journals Characterization of α-Glucosidase Inhibitors from Clinacanthus nutans Lindau Leaves by Gas Chromatography-Mass Spectrometry-Based Metabolomics and Molecular Docking Simulation

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2402 ◽  
Author(s):  
Suganya Murugesu ◽  
Zalikha Ibrahim ◽  
Qamar-Uddin Ahmed ◽  
Nik-Idris Nik Yusoff ◽  
Bisha-Fathamah Uzir ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Molecular Docking ◽  
Acid Methyl Ester ◽  
Docking Simulation ◽  
Partial Least Square ◽  
Least Square ◽  
Gas Chromatography Mass Spectrometry ◽  
Glucosidase Inhibitors ◽  
Clinacanthus Nutans

Background: Clinacanthus nutans (C. nutans) is an Acanthaceae herbal shrub traditionally consumed to treat various diseases including diabetes in Malaysia. This study was designed to evaluate the α-glucosidase inhibitory activity of C. nutans leaves extracts, and to identify the metabolites responsible for the bioactivity. Methods: Crude extract obtained from the dried leaves using 80% methanolic solution was further partitioned using different polarity solvents. The resultant extracts were investigated for their α-glucosidase inhibitory potential followed by metabolites profiling using the gas chromatography tandem with mass spectrometry (GC-MS). Results: Multivariate data analysis was developed by correlating the bioactivity, and GC-MS data generated a suitable partial least square (PLS) model resulting in 11 bioactive compounds, namely, palmitic acid, phytol, hexadecanoic acid (methyl ester), 1-monopalmitin, stigmast-5-ene, pentadecanoic acid, heptadecanoic acid, 1-linolenoylglycerol, glycerol monostearate, alpha-tocospiro B, and stigmasterol. In-silico study via molecular docking was carried out using the crystal structure Saccharomyces cerevisiae isomaltase (PDB code: 3A4A). Interactions between the inhibitors and the protein were predicted involving residues, namely LYS156, THR310, PRO312, LEU313, GLU411, and ASN415 with hydrogen bond, while PHE314 and ARG315 with hydrophobic bonding. Conclusion: The study provides informative data on the potential α-glucosidase inhibitors identified in C. nutans leaves, indicating the plant’s therapeutic effect to manage hyperglycemia.

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