JOURNAL OF SEPARATION SCIENCE
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2018
·Vol. 41
·期 16
·3318-3327
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IF 2.415
Ming Zhong,Yan-Hong Wang,Lu Wang,Rui-Qing Long,Chun-Lin Chen
A novel type of magnetic molecularly imprinted polymer was prepared for the selective enrichment and isolation of chelerythrine from Macleaya cordata (Willd) R. Br . The magnetic molecularly imprinted polymers were prepared using functional Fe 3 O 4 @SiO 2 as a magnetic support, chelerythrine as template, methacrylic acid as functional monomer, and ethylene glycol dimethacrylate as cross-linker. Density functional theory at the B3LYP/6-31G (d, p) level with Gaussian 09 software was applied to calculate the interaction energies of chelerythrine, methacrylic acid and the complexes formed from chelerythrine and methacrylic acid in different ratios. The structural features and morphology of the synthesized polymers were characterized by using Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and vibration sample magnetometry. Adsorption experiments revealed that the magnetic molecularly imprinted polymers possessed rapid kinetics, high selectivity, and a higher binding capacity (7.96 mg/g) to chelerythrine than magnetic molecularly non-imprinted polymers (2.36 mg/g). The adsorption process was in good agreement with the Langmuir adsorption isotherm and pseudo-second-order kinetics models. Furthermore, the magnetic molecularly imprinted polymers were successfully employed as adsorbents for the extraction and enrichment of chelerythrine from Macleaya cordata (Willd) R. Br . The results indicated that the magnetic molecularly imprinted polymers were suitable for the selective adsorption of chelerythrine from complex samples such as natural medical plants.
研究领域:
药学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Pharmaceutical Analysis
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2022
·
IF 14.026
Hongyi Li,Yi Wang,Shumin Shao,Hui Yu,Deqin Wang,Chuyuan Li,Qin Yuan,Wen Liu,Jiliang Cao,Xiaojuan Wang,Haibiao Guo,Xu Wu,Shengpeng Wang
Rabdosia serra ( R. serra ), an important component of Chinese herbal tea, has traditionally been used to treat hepatitis, jaundice, cholecystitis, and colitis. However, the chemical composition of R. serra and its effect against colitis remain unclear. In this study, the chemical composition of the water extract of R . serra was analyzed using ultra performance liquid chromatography coupled with a hybrid linear ion trap quadrupole-orbitrap mass spectrometer (UPLC-LTQ-Orbitrap-MS). A total of 46 compounds, comprising ent -kaurane diterpenoids, flavonoids, phenolic acids, and steroids, were identified in the water extract of R . serra , and the extract could significantly alleviate dextran sulfate sodium salt-induced colitis by improving colon length, upregulating anti-inflammatory factors, downregulating proinflammatory factors, and restoring the balance of T helper 17/T regulatory cells. R. serra also preserved intestinal barrier function by increasing the level of tight junction proteins (zonula occludens 1 and occludin) in mouse colonic tissue. In addition, R . serra modulated the gut microbiota composition by increasing bacterial richness and diversity, increasing the abundance of beneficial bacteria ( Muribaculaceae , Bacteroides , Lactobacillus , and Prevotellaceae_UCG-001 ), and decreasing the abundance of pathogenic bacteria ( Turicibacter , Eubacterium_fissicatena_group , and Eubacterium_xylanophilum_group ). Gut microbiota depletion by antibiotics further confirmed that R . serra alleviated colitis in a microbiota-dependent manner. Overall, our findings provide chemical and biological evidence for the potential application of R . serra in the management of colitis.
研究领域:
药理学
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免疫学
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微生物学
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胃肠病学
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DOI
PubMed
高影响因子
PLANTA MEDICA
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2013
·
IF 2.348
Cui-Ting Luo,Huan-huan Zheng,Shuang-Shuang Mao,Mao-xun Yang,Cheng Luo,Heru Chen
Two new xanthones, 1,8-dihydroxy-3-methoxyxanthone 7-O-[α-L-rhamnopyranosyl(1 → 2)-β-D-glucopyranoside] (1) and 1,8- dihydroxy-3-methoxyxanthone 7-O-[α-L-rhamnopyranosyl(1 → 3)-α-L-rhamno-pyranosyl (1 → 2)-β-D-xylopyranoside] (2), together with 26 known xanthones (3–28), were isolated from the aqueous ethanol extract of the traditional Chinese herb Swertia mussotii. Their structures were elucidated via spectroscopic analyses including 2D NMR. The inhibition of α-glucosidase by the isolated xanthones was evaluated by an in vitro high-throughput screening assay. Our results indicated that 1,3,5,8-tetrahydroxyxanthone is the best inhibitor with an IC50 value of 5.33 ± 0.09 µM, while the O-glycosylated xanthones were poor α-glycosidase inhibitors.
研究领域:
药理学
·
天然产物化学
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY & BIODIVERSITY
·
2022
·Vol. 19
·期 5
·e202100936
·
IF 2.745
Sitong Lu,Zhaoyu Zhang,Youling Liang,Qingkun Zhong,Guangfa Li,Zhang Hu
Phlomis medicinalis Diels, an important perennial herbal plant unique to the Qinghai-Tibet Plateau, is often used as Tibetan Materia Medicine Radix Phlomii for the treatment of cold, cough, and convergence trauma. In order to efficiently extract the iridoid glycosides from P. medicinalis , an ultrasound-assisted deep eutectic solvent extraction technique was employed. The main parameters influencing the extraction process were studied through single-factor tests and the extraction was optimized by using response surface methodology. The hemostasis activity of total iridoid glycosides (TIG) from P. medicinalis was evaluated in vitro and in mice. The optimization results revealed that the optimal process parameters were liquid-solid ratio 20 : 1, choline chloride-lactic acid concentration 79 %, and sonication time 34 min, under which a TIG extraction yield of 20.73 % was obtained. Meanwhile, high-performance liquid chromatography-photodiode array/mass spectrometry (HPLC-PDA/MS) was employed to characterize the optimized extract and indicated that TIG from P. medicinalis mainly consisted of sixteen reported iridoid glycosides with a total content of 91.22 %. The experimental results in vivo and in vitro indicated that TIG from P. medicinalis had strong hemostasis activities, which may be achieved by increasing the fibrinogen levels. Therefore, the ultrasound-assisted deep eutectic solvent extraction is an effective method to extract iridoid glycosides from P. medicinalis and they will be promising candidates to be developed for medical hemostasis agents. Graphical
研究领域:
药用植物学
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天然产物化学
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药物开发
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产品关联
DOI
PubMed
高影响因子
PHYTOCHEMISTRY
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2019
·
IF 2.905
Fei Luo,Yi Ling,De-Sen Li,Ting Tang,Yan-Chun Liu,Yan Liu,Sheng-Hong Li
Cedrol is an extremely versatile sesquiterpene alcohol that was approved by the Food and Drug Administration of the United States as a flavoring agent or adjuvant and has been commonly used as a flavoring ingredient in cosmetics, foods and medicine. Furthermore, cedrol possesses a wide range of pharmacological properties including sedative, anti-inflammatory and cytotoxic activities. Commercial production of cedrol relies on fractional distillation of cedar wood oils , followed by recrystallization, and little has been reported about its biosynthesis and aspects of synthetic biology . Here, we report the cloning and functional characterization of a cedrol synthase gene ( Lc-CedS ) from the transcriptome of the glandular trichomes of a woody Lamiaceae plant Leucosceptrum canum . The recombinant Lc-CedS protein catalyzed the in vitro conversion of farnesyl diphosphate into the single product cedrol, suggesting that Lc-CedS is a high-fidelity terpene synthase. Co-expression of Lc-CedS , a farnesyl diphosphate synthase gene and seven genes of the mevalonate (MVA) pathway responsible for converting acetyl-CoA into farnesyl diphosphate in Escherichia coli afforded 363 μg/L cedrol as the sole product under shaking flask conditions. Transient expression of Lc-CedS in Nicotiana benthamiana also resulted in a single product cedrol with a production level of 3.6 μg/g fresh weight. The sole production of cedrol by introducing of Lc-CedS in engineered E. coli and N. benthamiana suggests now alternative production systems using synthetic biology approaches that would better address sufficient supply of cedrol.
研究领域:
植物生物化学
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合成生物学
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代谢工程
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DOI
PubMed
高影响因子
PHYTOMEDICINE
·
2021
·
IF 5.34
Kaihui Zhang,Yufeng Yao,Meiqi Wang,Fangle Liu,Qian Wang,Huanhuan Ma,Yuanyuan Xie,Yunxia Ma,Pengyu Dai,Chenchen Zhu,Chaozhan Lin
Background Rabdosia Serra, the dried aerial parts of Rabdosia serra (Maxim.) Hara (RS) from the Labiatae family, is a traditional Chinese herbal medicine called Xihuangcao. Although RS has been found to exert a therapeutic effect on cholestasis, the underlying molecular mechanism remains unclear. Purpose This study was designed to investigate the pharmacological effect and mechanism of RS on cholestatic rats using metabolomics platform. Methods Histopathology and biochemical evaluations were performed to determine the therapeutic effect of RS and developed a rapid metabolite detection technology method based on UPLC-MS/MS to perform metabolomics research. Further, quantitative real-time polymerase chain reaction (RT-qPCR) was used to study the effect of RS on the bile acid metabolism pathway at the transcriptional level. Results RS significantly reduced the bile flow rates in cholestatic rats and decreased the levels of ALT, AST, TBA, T-BIL, and LDH, which were increased in the model group. Histological analysis showed that RS alleviated the liver injury induced by ANIT. Serum metabolomics results revealed 33 of the 37 biomarkers were found to be significantly altered by ANIT, and 26 were considerably changed following treatment with RS. Metabolic pathway analysis revealed four pathways such as primary bile acid biosynthesis, biosynthesis of unsaturated fatty acids, and arachidonic acid and tryptophan metabolism. The bile acid secretion process and the inflammation and oxidative stress processes are the major biochemical reactions following treatment with ANIT and RS. Bile acid-targeted metabolomics study showed that TCA, GCA, GCDCA, and GDCA might be sensitive biomarkers that induced liver injury. we found that treatment with RS regulated the levels of bile acid in the serum and liver and restored the proportion of bile acids, especially CA and conjugated bile acids, such as TCA and GCA, in the bile duct. RS increased the mRNA expression levels of FXR, SHP, BSEP , and MRP2 in livers, and IBABP, OST-α , and OST-β in the ileum. Conclusion : In this study, RS was found to protect the liver by regulating multiple metabolic pathways and promoting the excretion of bile acids. Simultaneously, RS played an essential role in reversing the imbalance of bile acids and protected against cholestasis by regulating the expression of transporters associated with bile acids. We demonstrated the correlation between molecular mechanisms and metabolites, provide a reference for the fabrication of extracts that can be used to treat cholestasis.
研究领域:
药理学
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代谢组学
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传统中药
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肝脏疾病
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Jichen Yang,Xiaoli Wang,Chuanying Zhang,Lun Ma,Tao Wei,Yajing Zhao,Xin Peng
Flavonoid compounds have anti-diabetic activity, which can control blood glucose levels by inhibiting α-glucosidase activity. In this paper, the inhibition mechanisms between four flavonoid compounds and α-glucosidase were studied by multispectroscopic methods and molecular docking . The results showed that the inhibitory activities of flavonoid compounds were higher than that of acarbose , and the sequence of inhibition effect was scutellarein > nepetin > apigenin > hispidulin > acarbose. Also, the synergistic effects of flavonoid compounds combined with acarbose on inhibiting α-glucosidase activity were observed. The fluorescence results showed that flavonoid compounds combined with α-glucosidase to form a stable complex. And the spectral analysis indicated that the microenvironmental and secondary structure of α-glucosidase were changed. The present study demonstrated that the molecular structure of flavonoid compounds played an important role in the inhibition process, namely, scutellarein with more hydroxyl groups on the A-ring might serve as the most effective α-glucosidase inhibitor.
研究领域:
药理学
·
生物化学
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
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