Multi‐component profiles through the blood–brain barrier in rat after oral administration of over‐the‐counter drug Keke capsule by ultra‐performance liquid chromatography/quadrupole‐ time‐of‐flight MS^E method

Abstract

Keke capsule as a traditional Chinese medicine formulation is used to relieve cough, for analgesia and to reduce bronchial asthma. The multi-components are absorbed into the blood and brain after oral administration of Keke capsule, with no systematic investigation so far. A reliable and rapid UPLC-QTOF-MS combined with a data processing software platform was used to characterize the components of Keke capsule and simultaneously identify bioactive components in blood and brain tissues in rat after oral administration. Consequently, a total of 41 components of Keke capsule, including alkaloids, flavone, flavonols, triterpene, lignanoid, organic acids, glycosides and coumarin were identified. Twenty-one components were found in plasma, including 18 prototypes and three metabolites; 15 components were found in brain tissues, including 10 prototypes and five metabolites. Alkaloids and flavonoids in Keke capsule were the main components which were absorbed into blood. The main alkaloids of Keke capsule can pass through the blood-brain barrier and show different distribution tendencies in brain tissues. The main components of keke capsule was simultaneously analyzed by throughput analysis, and the corresponding bioactive components were examined by blood-brain barrier in the rat after oral administration of the capsule.

Rapid identification of chemical components in Zhizi Baipi decoction by ultra‐performance liquid chromatography quadrupole time‐of‐flight mass spectrometry coupled with a novel informatics UNIFI platform

“…Mass spectrometric data acquisition is divided into data-dependent acquisition and data-independent acquisition (DIA), where the DIA technique does not require preselection of compounds in the sample but directly acquires the mass spectral information of all compounds separated by the column [7]. As one of the typical DIA techniques, full information MS/MS (MS E ) is a data acquisition method that enables alternating "low collision energy" and "high collision energy" scans to obtain highly accurate information on precursor and fragment ions and enables correlation attribution based on the chromatographic behavior of the precursor and fragment ions [8]. Due to the large differences in content, structural types, and physicochemical properties among the many components of TCM in the qualitative analysis process, in the past, researchers often manually extracted peaks and identified compounds one by one based on information such as quasi-molecular ions, characteristic fragment ions, retention time (Rt), and so forth.…”

Two Species Origins Comparison of Herba Patriniae Based on Their Ingredients Profile by UPLC‐QTOF/MS/MS and Orthogonal Partial Least Squares Discriminant Analysis

“…Ultra-high performance liquid chromatography tandem time-offlight mass spectrometry (UPLC-QTOF-MS/MS) technology combined with information dependent acquisition (IDA) can simultaneously obtain high-quality and accurate primary and secondary mass spectrometry information of the compound. [20] According to the primary and secondary mass spectrometry information, the target compound can be quickly screened or inferred. [21] Since compounds with the same structure have similar fragmentation rules and characteristic fragments in mass spectrometry, the study of the fragmentation rules of similar reference materials and their characteristic fragment ions as a diagnostic basis is conducive to the analysis of the mass spectra of unknown compounds.…”

“…In this study, a fast and effective method was used to analyze the chemical components in HP. Ultra‐high performance liquid chromatography tandem time‐of‐flight mass spectrometry (UPLC‐QTOF‐MS/MS) technology combined with information dependent acquisition (IDA) can simultaneously obtain high‐quality and accurate primary and secondary mass spectrometry information of the compound [20] . According to the primary and secondary mass spectrometry information, the target compound can be quickly screened or inferred [21] .…”

Metabolite Profile Changes in Different Regions of Rat Brain Affected by Ephedra sinica

“…In our previous research, it was found that alkaloids in EP could rapidly cross the blood-brain barrier of rats after oral administration, presenting the different characteristics of regional distribution in 6 brain regions mentioned above. Especially, the cortex and hippocampus were the main distribution regions of alkaloids [27][28][29]. However, whether the specific distributions of EP cause the different changes of metabolism in brain regions is still unknown.…”