Publications by authors named "Lantong Zhang"

The pharmacological effects of flavonoids in (L.) Kurz against inflammation, bacterial, and oxidation have been well-documented. Additionally, it is commonly consumed as tea.

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Galangin, a naturally available flavonoid, induces a variety of pharmacological activities and biological effects via several mechanisms. However, in vivo metabolism of galangin has not been fully explored, which means knowledge of its pharmacodynamics and application potential is limited. The objective of this study was to establish an ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry method for the rapid profiling and identification of galangin metabolites in vitro and in vivo using unique online information-dependent acquisition with multiple mass defect filtering combined with dynamic background subtraction in positive ion mode.

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Ginkgolide B is a dietary diterpene with multiple pharmacological activities. However, current research on ginkgolide B is not comprehensive. The current study analyzed the metabolic profile of ginkgolide B in vivo and in vitro using ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry.

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Fort., a traditional Chinese medicine, has demonstrated anti-inflammatory, immunomodulatory, antidementia, neuroprotective, antibacterial, and antioxidant effects. Its flowers, leaves, and roots have been used as traditional Chinese medicines.

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Celastrol has attracted great attention owing to its anti-arthritis, antioxidant, and anticancer activities. Nevertheless, its metabolism in vivo (rats) and in vitro (rat liver microsomes and intestinal flora) has not been comprehensively characterized. In this study, ultra-high-performance liquid chromatography coupled with hybrid triple quadrupole time-of-flight mass spectrometry was used as a rapid and sensitive approach for studying the metabolism of celastrol in vivo and in vitro.

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Oroxin B, a flavonoid, is a major bioactive component form Oroxylum indicum (L.) Vent. with enormous anti-hepatoma effects.

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Article Synopsis
  • - A specific and rapid UPLC-ESI-MS/MS method was established to measure ticarcillin and clavulanate levels in rat plasma.
  • - The method demonstrated linearity in concentrations from 10 to 10,000 ng/mL with high extraction recoveries (86.9% to 96.4%) for the compounds analyzed.
  • - Distinct pharmacokinetic profiles were observed for ticarcillin R and S isomers, with rapid absorption and varying elimination rates, indicating successful method validation for use in research.
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Article Synopsis
  • Eupatorin, a bioactive compound from Java tea, exhibits significant anti-cancer, anti-inflammatory, and vasodilation properties but lacks pharmacokinetic studies to date.
  • This research developed a sensitive LC-MS/MS method to measure eupatorin levels in rat plasma, proving reliable with low variability in precision and accuracy.
  • The pharmacokinetic analysis indicated a peak plasma concentration of 974.886 μg/L at 0.25 hours post-administration and a half-life of 0.353 hours, emphasizing eupatorin's potential in pharmacology and clinical applications.
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Bilobetin, a natural compound extracted from Ginkgo biloba, has various pharmacological activities such as antioxidation, anticancer, antibacterial, antifungal, anti-inflammatory, antiviral, and promoting osteoblast differentiation. However, few studies have been conducted and there are no reports on its metabolites owing to its low content in nature. In addition, it has been reported to have potential liver and kidney toxicity.

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At present, cancer is one of the most lethal diseases in the world, and researchers are committed to developing effective anticancer drugs. Isoginkgetin (IGG) is a kind of biflavone with the potential to treat cancer due to the features of altering the cell cycle and inhibiting tumor cell infiltration. However, its solubility, absorbability and bioavailability are poor, so in this study, IGG was prepared into mixed nanomicelles and evaluated in vitro and in vivo.

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Hinokiflavone (HF) is a natural biflavonoid extracted from medicinal plants such as and . HF plays a crucial role in the treatment of several cancers. However, its poor solubility, instability, and low bioavailability have limited its use.

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Article Synopsis
  • Eriocitrin, a key compound in lemons, has notable health benefits including antioxidant, anticancer, and anti-inflammatory properties, and is commonly used in food and beverages.
  • A new LC/MS/MS method was developed to efficiently analyze eriocitrin levels in rat plasma, ensuring precision and accuracy in the measurements.
  • The pharmacokinetic study revealed the maximum concentration of eriocitrin in plasma, how long it takes to peak, and its half-life, providing foundational data for future research.
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Amentoflavone (AMF) is a kind of biflavonoids existing in Ginkgo biloba leaves. It has many biological activities, such as antioxidant, anti-inflammatory, anti-bacterial, antiviral, hypoglycemic, anti-tumor and inducing apoptosis. However, its solubility and bioavailability are poor and there are a few studies on it .

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Biochanin A is a dietary isoflavone with multiple biological functions. Owing to a lack of comprehensive studies of biochanin A metabolism, this study was designed to further clarify the processes involved in biochanin A metabolism. In this study, ultrahigh-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS/MS) was utilized to characterize the metabolism of biochanin A in vivo and in vitro.

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Although farrerol, a characteristically bioactive constituent of L., exhibits extensive biological and pharmacological activities (e.g.

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Tuberculosis of cervical lymph nodes is called scrofula in Traditional Chinese Medicine (TCM). Clinical manifestation is that unilateral or bilateral neck can have multiple enlarged lymph nodes of different sizes. Current therapeutic drugs include Lysionotus pauciflorus Maxim.

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Eriocitrin, a main flavonoid in lemons, possesses strong antioxidant, lipid-lowering and anticancer activities and has long been used in food, beverages and wine. However, its metabolism and is still unclear. In this study, an efficient strategy was developed to detect and identify metabolites of eriocitrin by using ultra-high-performance liquid chromatography coupled with hybrid triple quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS) based on online data acquisition and multiple data processing techniques.

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Eupatorin is the major bioactive component of Java tea (), exhibiting strong anticancer and anti-inflammatory activities. However, no research on the metabolism of eupatorin has been reported to date. In the present study, ultra-high-performance liquid chromatography coupled with hybrid triple quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS) combined with an efficient online data acquisition and a multiple data processing method were developed for metabolite identification in vivo (rat plasma, bile, urine and feces) and in vitro (rat liver microsomes and intestinal flora).

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Acacetin, a dietary component, is abundant in acacia honey and has superior anticancer activities. To date, no research on the metabolism of acacetin has been reported. In the current research, an online detection strategy of ultra-high-performance liquid chromatography connected to a quadrupole time-of-flight mass spectrometer (UHPLC-Q-TOF-MS/MS) was utilized for metabolite identification in vivo (rat plasma, bile, urine, and feces) and in vitro (rat liver microsomes).

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Essential oils (EOs) have been shown to have a diversity of beneficial human health effects. is a large and highly diverse genus of plants with medicinal and cosmetic significance. The aim of this study was to analyze the composition of EOs and to investigate their potential antifungal effects.

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Galangin is a marker compound of honey and Hance that exhibits great potential for anti-microbial, anti-diabetic, anti-obesity, anti-tumour and anti-inflammatory applications. Galangin is frequently consumed in combination with common clinical drugs. Here, we evaluated the effects of galangin on cytochrome P450 (CYP)-mediated metabolism, using two different approaches, to predict drug⁻drug interactions.

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Hinokiflavone (HF), belonging to biflavonoids, possesses excellent pharmacological activities, including anti-inflammatory, antioxidant and antitumor activity. Nevertheless, its metabolism in vivo (rats) and in vitro (rat liver microsomes and intestinal flora) is presently not characterized. In this study, ultra-high-performance liquid chromatography coupled with hybrid triple quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS) based on four-step strategy was a rapid method for the detection of HF metabolites.

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A sensitive and selective liquid chromatographic-tandem mass spectrometric (LC-MS/MS) method for the determination of bergenin and its phase II metabolite in rat plasma, bile and urine has been developed. Biological samples were pretreated with protein precipitation extraction procedure and enzymatic hydrolysis method was used for converting glucuronide metabolite to its free form bergenin. Detection and quantitation were performed by MS/MS using electrospray ionization and multiple reaction monitoring.

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In this paper, an analytical strategy combined data acquisition with a practical mining strategy aimed at rapid characterization and quantitation of -kaurane diterpenoids in using ultra high-performance liquid chromatography-triple time-of-flight mass spectrometry (UPLC-Q-TOF-MS/MS). First, an effective self-built filter template based on drug phase I/II metabolic reaction theory and a components library data set were established. Second, the mass spectra of -kaurane diterpenoid standards were studied and their mass spectrum cleavage pathways were summarized.

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(+)-usnic acid (UA) is an active natural phenolic acid ingredient originating from Chinese traditional Tibetan herb. Usnea acid is expected to become a new agent for anticancer and remarkable antitumor. To reveal its metabolic profile, metabolites identification of UA in vivo was studied using ultra-high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS/MS) in this present study.

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