PHYTOMEDICINE
·
2022
·
IF 6.656
Wanqian Peng,Zhiqiang Li,Dingji Cai,Xiaocui Yi,Ji Yue (Jeff) Zhang,Guoyue Zhong,Hui Ouyang,Yulin Feng,Shilin Yang
Background Pinnatifolone A is a typical sesquiterpenoid and the primary active ingredient of Syringa oblata Lindl., has potent anti-inflammatory activity. However, Pinnatifolone A pharmacokinetic and metabolites analysis investigations in male and female rats, as well as its in vitro stability in male and female rat liver microsomes , have not been evaluated and compared. Purpose To investigate preclinical pharmacokinetic and metabolite in both genders, confirm gender differences, and provide usable information for the development of clinical applications. Methods A quick, precise, and sensitive LC-MS/MS method was created and effectively used to determine the pharmacokinetics of oral (140 mg/kg) and intravenous (6.3 mg/kg) Pinnatifolone A in male and female rats, in vitro Pinnatifolone A elimination studies in male and female rat liver microsomes. Following that, a UHPLC-Q-TOF-MS/MS technique was established to identify the metabolic profiles of Pinnatifolone A obtained from rat plasma and excreta. Results In the current study, we established for the first time an LC-MS/MS method for the quantitation of Pinnatifolone A with acceptable linearity and selectivity, recovery and matrix effect, accuracy and precision. The absolute oral bioavailability of Pinnatifolone A was approximately 30.36% in female rats, the clearance (CL) was 20.99±3.33 l/h/kg in female rats and 472.37±437.31 l/h/kg in male rats. This difference in rat genders may pertain to the sex-specific expression of hepatic enzymes as demonstrated in the metabolic stability evaluation in the present research; the male rats exhibited higher CL int(mic) (158.83±9.57 μl/min/mg protein) than female rats (76.47±7.90 μl/min/mg protein) liver microsomes, indicating higher Pinnatifolone A clearance in male rats. Twenty-four metabolites were detected and identified in female and male rats; N-acetylcysteine conjugation metabolite was the most abundant metabolites in both rat feces and urine. Furthermore, male and female rats had significantly different levels of the N-acetylcysteine conjugation metabolite. Hydrogenation metabolite was particular to female rats both in rat fecal and urine. Glucuronide conjugation metabolite was the predominant metabolite in rat plasma, and its amount in female rats was double that of male rats. Conclusions The present research is the first to report the preclinical pharmacokinetics and metabolites of Pinnatifolone A in male and female rats, confirming the gender-based differences. The findings provide a comprehensive overview for further understanding of the pharmacokinetic and metabolic characteristics of Pinnatifolone A and serve as a guide for its future development and utilization.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Veterinary Science
·
2023
·
IF 3.2
Shiting Xie,Yixing Lu,Jun Wang,Changcheng Lin,Peiyu Ye,Xiaolin Liu,Wenguang Xiong,Zhenling Zeng,Dongping Zeng
Introduction Milbemycin oxime (MBO) and praziquantel (PZQ) have a broad spectrum of biological activity and are commonly used to treat the parasitic infection in the veterinary clinic. In this study, a fast and efficient LC-MS/MS method was established and validated for the simultaneous determination of MBO, PZQ, cis-4-hydroxylated-PZQ (C-4-OH-PZQ) and trans-4-hydroxylated-PZQ (T-4-OH-PZQ) and in cat plasma. Methods Extraction of analytes and internal standards from cat plasma by acetonitrile protein precipitation, allows rapid processing of large batches of samples. MBO, PZQ, C-4-OH-PZQ, T-4-OH-PZQ, and internal standard (IS) were eluted for 13.5 min on a C 18 column with a 0.1% formic acid water/acetonitrile mixture as the mobile phase. Results Results showed that the method had good precision, accuracy, recovery, and linearity. The linearity range was 2.5–250 ng/mL for MBO, and 10–1000 ng/mL for PZQ, C-4-OH-PZQ, and T-4-OH-PZQ. The intra-day and inter-day precision CV values of the tested components were within 15%. The extraction recoveries of the four components ranged from 98.09% to 107.46%. The analytes in plasma remained stable for 6 h at room temperature, 26 h in the autosampler (4 °C), after freeze–thaw (−20°C) cycles, and 60 days in a −20°C freezer. Method sensitivity sufficed for assessing pharmacokinetic parameters of MBO, PZQ, C-4-OH-PZQ, and T-4-OH-PZQ in plasma samples with LLOQ of 2.5 ng/mL for MBO and 10 ng/mL for PZQ, C-4-OH-PZQ, and T-4-OH-PZQ. Conclusion In this study, a selective and sensitive LC-MS/MS method for the simultaneous quantification of MBO, PZQ, C-4-OH-PZQ, and T-4-OH-PZQ in cat plasma was developed and validated.This method had been successfully applied to evaluate the pharmacokinetics of MBO, PZQ, C-4-OH-PZQ, and T-4-OH-PZQ after a single oral administration of 8 mg MBO and 20 mg PZQ in cats.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Chen Lizhu,Yu Yingjia,Duan Gengli,Wang Xin,Shen Baohua,Xiang Ping
Objective: Chiral analysis is a crucial method to differentiate selegiline intake from drug abuse. A dried urine spot (DUS) analytical method based on spotting urine samples (10 μL) onto dried spot collection cards, and followed by air-drying and extraction, was developed and validated for the determination of selegiline, desmethylselegiline, R/S-methamphetamine, and R/S-amphetamine.Methods: Methanol (0.5 mL) was found to be the ideal extraction solvent for target extraction from DUSs under orbital-horizontal stirring on a lateral shaker at 1,450 rpm for 30 min. Determinations were performed by direct electrospray ionization tandem mass spectrometry (ESI-MS/MS) under positive electrospray ionization conditions using multiple reaction monitoring mode. The chromatographic system consisted of a ChirobioticTM V2 column (2.1 × 250 mm, 5 μm) and a mobile phase of methanol containing 0.1% (v/v) glacial acetic acid and 0.02% (v/v) ammonium hydroxide.Results and conclusions: The calibration curves were linear from 50 to 5,000 ng/mL, with r > 0.995 for all analytes, imprecisions ≤ 15% and accuracies between −11.4 and 11.7%. Extraction recoveries ranged from 48.6 to 105.4% with coefficients of variation (CV) ≤ 13.7%, and matrix effects ranged from 45.4 to 104.1% with CV ≤ 10.3%. The lower limit of quantification was 50 ng/mL for each analyte. The present method is simple, rapid (accomplished in 12 min), sensitive, and validated by a pharmacokinetic study in human urine collected after a single oral administration of SG.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Forensic Toxicology
·
2024
·
IF 2.8
Zhang Xiaolong,Chen Yuxuan,Liu Jinlei,Wang Mengchao,Dai Yinyin,Zhao Kundi,Gu Jie,Zhang Huimin,Wurita Amin,Hasegawa Koutaro
Purpose Distribution and abuse of imidazole-derived γ-aminobutyric acid (GABA) agonists, such as etomidate and metomidate, and their analogs have been encountered frequently especially in China. The aim of this study was to identify etomidate, metomidate, propoxate, and isopropoxate more accurately by establishing a gas chromatography–mass spectrometry (GC–MS) and liquid chromatography tandem mass spectrometry (LC–MS/MS) method and applying it to real forensic cases. Methods One mg of the seized powder was dissolved in 1 mL of methanol, and subjected to GC–MS and LC–MS/MS. Hair samples were washed and cut into approximately 2 mm sections, then ground to powder by a low-temperature grinder. Twenty mg of the hair powder was extracted with 1 mL of methanol, and the supernatant was subjected to LC–MS/MS. Results Etomidate, metomidate, propoxate, and isopropoxate were chromatographically separated and each mass spectrum was obtained by GC–MS. For LC–MS/MS, tested validation data were all satisfactory. The seized powder samples contained isopropoxate, with an approximate content of 30.9%. Etomidate, etomidate acid, metomidate, and isopropoxate could be determined in the submitted hairs, ranging from 2.89 to 8.09 ng/mg, 0.0591–0.177 ng/mg, 0.342–2.77 ng/mg, and 33.2–130 ng/mg, respectively. Conclusions Mass spectra and ion chromatograms of etomidate, metomidate, isopropoxate, and propoxate were obtained by GC–MS. We have also established a simultaneous and reliable analytical method for etomidate, etomidate acid, metomidate, and isopropoxate in human hair by LC–MS/MS. This is the first report to present analytical results of a novel imidazole-derived GABA agonist isopropoxate in drug abuse cases.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Xianjing Li,Minlu Cheng,Yiya Wang,Chang Shu,Bingjie Zou,Qinxin Song,Li Ding
Recently, peptide-drug conjugate (PDC) has become the most promising conjugated drug for tumor therapy after antibody-drug conjugate due to stronger tumor penetration capacity and lower immunogenicity . CBP-1018 was a PDC with dual-ligand conjugated to MMAE via a cleavable linker (MC-Val-Cit-PABC) that can be lysed by cathepsins B. In this study, two specific LC-MS/MS methods were developed and validated for the determination of CBP-1018 and its metabolite MMAE in human plasma. To prevent the cleavable MC-Val-Cit-PABC linker from degradation, a protease inhibitor (cOmplete solution) was added to the pre-cooled vacuum tubes and the separated plasma samples. The assays involved the pretreatment of CBP-1018 by protein precipitation with H 2 O-ACN (1:9, v / v ) and the extraction of MMAE by liquid-liquid extraction with ethyl acetate under alkaline condition to eliminate the interference of CBP-1018 on MMAE. The two analytes showed good linearities over the calibration ranges (R 2 ≥ 9980). Both accuracy and precision met the acceptance criteria. The validated methods were successfully applied to the phase I dose-escalation study of CBP-1018 injection in Chinese patients with solid tumors to evaluate the pharmacokinetic properties of CBP-1018 and MMAE. The results showed that CBP-1018 was eliminated immediately after injection and MMAE reached the maximum exposure at approximately 2 h after infusion. The maximum concentration of MMAE did not exceed 20.0 ng/mL, suggesting that the off-target toxicity of CBP-1018 injection was controllable.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 36
·5281-5292
·
IF 1.9
Sheng-Dong Pan,Mei-Jun Ye,Guo-Sheng Gao,Qian He,Li Wang,Xiao-Hong Chen,Qiao-Li Qiu,Mi-Cong Jin
In this paper, a monodisperse, well-defined core–shell magnetic molecularly-imprinted polymer (MD-CS-MMIP) was controllably synthesized via modified precipitation polymerization and used as a magnetic solid-phase extraction adsorbent for the simultaneous determination of six trace mycotoxins in rice samples. The as-prepared MD-CS-MMIP was fully characterized by SEM, TEM, XRD, and TG-DTG. This study is particularly concerned with the influence of the amount of oleic acid used for MD-CS-MMIP synthesis on the material morphology, components, and adsorption efficiency. The results reveal that the modification of oleic acid on the Fe3O4 surface could improve the monodispersion of core–shell MD-CS-MMIP. Moreover, MD-CS-MMIP was used as a magnetic solid-phase extraction adsorbent for the determination of six mycotoxin residues in rice samples, and the adsorption and desorption conditions of MD-CS-MMIP toward mycotoxins were optimized to obtain the highest adsorption capacity, selectivity, and desorption efficiency. Under optimal conditions, the limits of quantitation (LOQs) of the developed method toward the six mycotoxins range from 0.003 μg kg−1 to 0.01 μg kg−1. The developed method was successfully used for the determination of mycotoxins in rice samples, with recoveries in the range of 86.3 to 103.1%.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2024
·
IF 2.8
Ninghong Li,Lu Liu,Dong Liu,Hengyi Yu,Guangjie Yang,Lihui Qiu,Yufei Chen,Dong Xiang,Xuepeng Gong
Tyrosine kinase inhibitors (TKIs) and triazole antifungals are the first-line drugs for treating chronic myeloid leukemia (CML) and fungal infections, respectively, but both suffer from large exposure differences and narrow therapeutic windows. Moreover, these two types of drugs are commonly used together in CML patients with fungal infections. Multiple studies and guidelines have suggested the importance of therapeutic drug monitoring (TDM) of TKIs and triazoles. Currently, methods for the simultaneous determination of both types of drugs are limited. We developed a simple, rapid, and reliable liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for simultaneous quantification of three commonly used TKIs (imatinib, dasatinib, and nilotinib) and three commonly used triazoles (voriconazole, itraconazole, and posaconazole) in human plasma. The analytes were eluted on a Welch XB-C 18 analytical column (50 × 2.1 mm, 5 µm) at 0.7 mL/min, using a gradient elution of 10 mM ammonium formate (A) and methanol–acetonitrile-isopropanol (80:10:10, v / v / v ) containing 0.2 % formic acid (B) with a total analysis time of 3.5 min. The calibration curves were linear over the range from 20 to 4000 ng/mL for imatinib and nilotinib, from 2 to 400 ng/mL for dasatinib, and from 50 to 10,000 ng/mL for voriconazole, itraconazole, and posaconazole. Selectivity, accuracy, precision, recovery, matrix effect, and stability all met the validation requirements. The method was successfully used for TDM in CML patients who co-treated with both TKIs and triazoles. Drug-drug interaction analysis between TKIs and triazoles showed that a significant positive correlation was observed between imatinib and voriconazole, as well as dasatinib and voriconazole. Therefore, this method can be well applied in clinical TDM for patients receiving TKIs, triazoles, or both simultaneously.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CLINICAL BIOCHEMISTRY
·
2025
·
IF 2.1
Chunyan Zhang,Nan Bai,Yanling Yang,Yuxuan Cheng,Xiyu He,Meng Wang,Honghui Zhou,Yaping Tian
Objectives Metabolic disorders in newborns can cause significant morbidity and mortality if not diagnosed and managed early. In this study, we developed and validated a reliable LC-MS/MS method to simultaneously quantify methylmalonic acid, methylcitric acid, malonic acid, ethylmalonic acid, and total homocysteine associated with metabolic disorders. Design and methods According to Clinical Laboratory Standards Institute (CLSI) guidelines, various analytical performances (i.e., precision, linearity, accuracy and reference intervals) were rigorously evaluated. Meanwhile, sample preparation, chromatographic separation and mass spectrometric detection and incorporating stable isotope-labeled internal standards were optimized. Furthermore, calibrators and quality controls were developed to ensure standardization and traceability. Results The coefficient of variations for precision were less than 10.0 %. Meanwhile, the results showed high accuracy (recoveries: 94.57 %–109.60 %) and robust linearity (R 2 > 0.9935) over clinically relevant ranges. The limits of detection and limits of quantification for all analytes were established, enabling sensitive detection of pathological elevations. Reference intervals for pediatric populations (ages 0–1 month and 2 months to 18 years) were determined, providing essential baselines for clinical interpretation. Conclusions The newly developed method demonstrated good analytical performance and offers a standardized, high-throughput solution for clinical laboratories to improve early diagnosis and personalized management of metabolic diseases.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2014
·
IF 2.829
Feng Chen,Hai-Long Li,Yin-Feng Tan,Yong-Hui Li,Wei-Yong Lai,Wei-Wei Guan,Jun-Qing Zhang,Yuan-Sheng Zhao,Zhen-Miao Qin
Alpinia oxyphylla (Yizhi) capsularfruits are commonly used in traditional medicine. Pharmacological studies have demonstrated that A. oxyphylla capsularfruits have some beneficial roles. Besides volatile oil, sesquiterpenes, diarylheptanoids and flavonoids are main bioactive constituents occurring in the Yizhi capsularfruits. The representative constituents include tectochrysin, izalpinin, chrysin, apigenin-4′,7-dimethylether, kaempferide, yakuchinone A, yakuchinone B, oxyphyllacinol and nootkatone. Their content levels in the fruit and its pharmaceutical preparations have been reported by our group. The nine phytochemicals are also the major components present in the Yizhi alcoholic extracts, which have anti-diarrheal activities. However, the fates of these constituents in the body after oral or intravenous administration remain largely unknown. In the present study, we focus on these phytochemicals albeit other concomitant compounds. The chemicals and their metabolites in rat plasma were identified using liquid chromatography/tandem mass spectrometry with selected reaction monitoring mode after orally administered Yizhi extract to rats. Rat plasma samples were treated by methanol precipitation, acidic or enzymatic hydrolysis. This target analysis study revealed that: (1) low or trace plasma levels of parent chemicals were measured after p.o. administration of Yizhi extract, Suoquan capsules and pills to rats; (2) flavonoids and diarylheptanoids formed mainly monoglucuronide metabolites; however, diglucuronide metabolites for chrysin, izalpinin and kaempferide were also detected; (3) metabolic reduction of Yizhi diarylheptanoids occurred in rats. Yakuchinone B was reduced to yakuchinone A and then to oxyphyllacinol in a stepwise manner and subsequently glucuronidated by UDP-glucuronosyl transferase. Further research is needed to characterize the UDP-glucuronosyl transferase and reductase involved in the biotransformation of Yizhi chemicals.
研究领域:
药理学
·
分析化学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 9
·2069-2081
·
IF 1.915
Qi Wen,Hai-Long Li,Yin-Feng Tan,Xu-Guang Zhang,Zhen-Miao Qin,Wei Li,Yong-Hui Li,Jun-Qing Zhang,Feng Chen
Alpiniae oxyphyllae Fructus (Yizhi in Chinese) is commonly used for the treatment of diarrhea, intestinal disorders and urinary incontinence symptoms. To date, little information is available on the pharmacokinetic (PK) properties of this herb. We have identified the known active chemicals (including nootkatone, yakuchinone A, yakuchinone B, oxyphyllacinol, tectochrysin, chrysin, izalpinin, apigenin-4′,7-dimethylether, and kaempferide) and their metabolites (phase II metabolites and oxidized product such as kaempferol) from Yizhi extract in rat plasma using liquid chromatography/tandem mass spectrometry (LC-MS/MS) with selected reaction monitoring. In the present study, an LC-MS/MS-based method was developed and validated for the simultaneous quantitation of the Yizhi chemicals and their metabolites in rat plasma after enzymatic treatment. A mixture of β-glucuronidase and sulfatase was used to liberate parent chemicals from their phase II metabolites. A post-extraction spike method, as well as a post-column infusion method, was conducted to investigate matrix-effects. Particularly, the ion suppression effect for all the analytes was overcome through combining a liquid–liquid extraction method for clean-up, elution gradient optimization for separation and inclusion of very low concentration of HCOOH into the mobile phase. Mean accuracies were obtained in the range of 84.7–112% at three different quality control levels for the ten analytes, with intra- and inter-day variations within 13.6% (1.76–13.6%). This validated method was successfully applied to a PK investigation in rats after a single oral administration of Yizhi extract. These results supply a suitable reference for further PK studies of the Yizhi chemicals and their metabolites in the future.
研究领域:
中药学
·
分析化学
·
药理学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2026
·
IF 3.4
Hui Yan,Haoyang Lu,Shanqing Huang,Yuqing Li,Hui Xia,Wanting Huang,Dewei Shang,Ming Zhang
Dysregulation of the tryptophan (TRP) metabolic pathway is closely linked to the pathophysiology of neuropsychiatric disorders, such as depression. This study aimed to develop and validate a sensitive, rapid, and robust liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the simultaneous quantification of TRP and its metabolites, kynurenine (KYN) and kynurenic acid (KYNA), in human serum. Analytes were extracted from 100 µL of serum via simple protein precipitation with acetonitrile. Chromatographic separation was achieved on an Agilent ZORBAX HILIC Plus column (4.6 mm×100 mm, 3.5 µm) using isocratic elution with a mobile phase of methanol: acetonitrile containing 5 mM ammonium formate. Quantification was performed using an electrospray ionization source in positive ion multiple reaction monitoring (MRM) mode, with a total run time of only 2.0 min.The linear ranges were 1- 50 µg/mL for TRP, 0.1-5 µg/mL for KYN, and 1-50 ng/mL for KYNA, covering clinically relevant levels. A weighting factor of 1/x² provided the best fit for calibration curves (R² > 0.99). Extraction recoveries ranged from 88.23% to 99.39%, and mean internal standard-normalized matrix effects were 81%-100%. Accuracy and precision values met bioanalytical acceptance criteria. Stability assessments confirmed that samples were stable at -20°C and -80°C for 31 days and through three freeze-thaw cycles. This validated method was successfully applied to analyze serum samples from 103 adolescent patients with first-episode depression.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ONCOLOGY PHARMACY PRACTICE
·
2022
·
IF 1.416
Hailong Zhou,Yunyun Li,Fan Xu
PurposeOccupational exposure is a long-standing public health concern, which has drawn more and more attention in recent years to the problem of how to carry out occupational protection effectively. Gloves are regarded as the most critical protective equipment for cytotoxic medications. However, there is still little research conducted on the protective performance of gloves made of different materials and the optimal glove combination for cytotoxic agents.MethodsIn this research, a specific instrument intended for glove permeation experiment was designed, with various methods of liquid chromatography-tandem mass spectrometry (LC-MS/MS) developed and validated. By using the specific instrument and LC-MS/MS methods, a study was conducted on the permeation ability of eight selected cytotoxic drugs (fluorouracil, epirubicin (EPI), docetaxel (DCT), methotrexate (MTX), cyclophosphamide (CTX), etoposide (ETP), vincristine sulfate (VCR), and cisplatin derivatives Pt-(DDTC)3) into five kinds of gloves (rubber (RB), nitrile (NT), chlorinated polyethylene (CPE), low-density polyethylene, and polyvinylchloride (PVC) resin) given different contact times. Then, the experimental data were analyzed through a generalized estimation equation and Pearson correlation analysis.ResultsThe results show that within a short period of time (less than five minutes), ETP, CTX, fluorouracil, DCT, and cisplatin passed through five types of gloves but the level of MTX, VCR, and EPI permeation was minimal, despite the duration of contact between the three drugs and the gloves reaching as long as three hours. Furthermore, the permeation of DCT and ETP was found to be positively correlated with time.ConclusionsChlorinated polyethylene and PVC resin perform well in protecting against most cytotoxic drugs and are recommendable for clinical practice. Due to the poor protective ability, RB gloves are not recommended for this purpose. Based on the performance of various gloves in offering protection, the protection grade of two gloves can be deduced. Chlorinated polyethylene + PVC resin, CPE + NT glove combination shows good protective performance against most target drugs and can be recommended for clinical practice.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）