ABSTRACT
The purpose of this study was to identify sesquiterpenoids from Alpinia oxyphylla Miq. fruits under the guidance of LC-MS, and to evaluate their neuroprotective effects on the H2O2-induced SH-SY5Y cells. A total of 35 sesquiterpenoids, including 10 previously unreported ones, were isolated from A. oxyphylla fruits. The neuroprotective effect studies showed that compounds 2, 3, 12, 13, 20, 22, 25, 26, and 35 can improve the viability rates of the H2O2-induced SH-SY5Y cells whose viability rates were ≥ 80% and were higher than that of the positive control. Furthermore, thorough activity studies showed that compounds 3, 13, 22, and 35 can inhibit the production of ROS (reactive oxygen species), and that compounds 13, 22, and 35 can reduce both MDA (Malondialdehyde) and NO levels in the damaged cells in displaying a neuroprotective effect. This study confirmed that the fruits of A. oxyphylla contained abundant sesquiterpenoids with potential neuroprotective effect.
Subject(s)
Alpinia , Neuroblastoma , Neuroprotective Agents , Sesquiterpenes , Humans , Neuroprotective Agents/pharmacology , Fruit , Hydrogen Peroxide/pharmacology , Plant Extracts/pharmacology , Sesquiterpenes/pharmacologyABSTRACT
ETHNOPHARMACOLOGICAL RELEVANCE: The buds of Vaccinium dunalianum Wight are used as folk medicine in the Yi settlement of the Yunnan Province, China. It has long been used as herbal tea in the local area owing to its effects of lowering blood lipids and body weight. However, there are only a few studies on its antihyperlipidemic effects, effective substances and mechanisms, especially its effectiveness in diet-induced hyperlipidemia. AIM OF THE STUDY: This study aimed to elucidate the therapeutic effects, pharmacodynamic material bases, and mechanisms of V. dunalianum buds on diet-induced hyperlipidemia. MATERIALS AND METHODS: A high-fat diet-induced hyperlipidemic Sprague-Dawley (SD) rat model was established. Rats were gavaged with different doses of aqueous extract of V. dunalianum(VDW) for 8 weeks and their sera and organ samples were collected. The antihyperlipidemic effect of VDW on SD rats was evaluated based on the biochemical indices and histopathological outcomes. Liquid chromatography-mass spectrometry(LC-MS) was used to determine the main components in VDW, which were separated and purified using sequential chromatographic methods. Their chemical structures were determined using high-resolution electrospray ionization mass spectroscopy and nuclear magnetic resonance spectroscopy. 6'-O-caffeoyl-arbutin, as the principal component of VDW, was also evaluated for its antihyperlipidemic activity using an approach similar to that used for VDW. Lastly, the potential targets of VDW and 6'-O-caffeoyl-arbutin in lowering blood lipids were screened out using network pharmacology, and the selected targets were docked with arbutin derivatives. The expression of target proteins was determined using western blotting to illustrate the antihyperlipidemic mechanisms of VDW and 6'-O-caffeoyl-arbutin. RESULTS: VDW reduced triglyceride, total cholesterol, low-density lipoprotein, alanine transaminase, and aspartate transaminase levels in the serum of modeled rats, and increased high-density lipoprotein levels. There was an improvement in steatoses, and lipid droplet accumulation decreased in vivo after VDW intervention. LC-MS revealed that VDW mainly contained arbutin and chlorogenic acid derivatives. Sixteen compounds were isolated and identified. 6'-O-caffeoyl-arbutin was the main compound of VDW (>21.67%) that showed obvious antihyperlipidemic effect with low hepatic damage at different doses. PTGS2, ADH1C, and MAOB were screened out using network pharmacology and they showed strong correlations with arbutin derivative through molecular docking. Results from WB showed that VDW and 6'-O-caffeoyl-arbutin could reduce blood lipid levels by reducing the protein expression of PTGS2, ADH1C, and MAOB. CONCLUSIONS: 6'-O-caffeoyl-arbutin was the main component of V. dunalianum buds. VDW and 6'-O-caffeoyl-arbutin could regulate blood lipid levels in the high-fat diet-induced rat model of hyperlipidemia without damaging their vital organs. Furthermore, they could regulate the expression of PTGS2, ADH1C, and MAOB proteins and play a role in lowering blood lipids. The findings of this study lay a foundation for the further development of V. dunalianum and 6'-O-caffeoyl-arbutin as health supplements or drugs for the management of hyperlipidemia.
Subject(s)
Hyperlipidemias , Vaccinium , Rats , Animals , Hypolipidemic Agents/pharmacology , Chromatography, Liquid , Vaccinium/chemistry , Arbutin/chemistry , Cyclooxygenase 2 , Molecular Docking Simulation , Rats, Sprague-Dawley , Tandem Mass Spectrometry , China , Hyperlipidemias/drug therapy , Lipids , Diet, High-FatABSTRACT
BACKGROUND: Iron-overloaded patients are recognized as presenting an increased risk of osteoporosis. However, studies on the correlation between osteoporosis and organ iron overload are controversial or scarce. The aim of this study is to assess bone mineral density (BMD) and trabecular bone score (TBS) in correlation with hepatic and pancreatic iron overload. METHODS: Forty-one patients diagnosed with hemoglobinopathies, were studied. BMDs of the lumbar spine (LS), femoral neck (FN), and total hip (TH) were analyzed by Dual-energy X-ray absorptiometry (DXA) scan. LS bone quality was derived from each spine DXA examination using the TBS analysis. Hepatic and pancreatic iron overload were obtained with a multi-echo gradient echo T2* technique. RESULTS: Abnormal microarchitecture and abnormal bone mass were observed in 19/41 (46.3%) and 9/41 (22.0%) patients, respectively. For 26 males, BMD, T-score and Z-score of LS were significantly lower among subjects with moderate-severe hepatic iron-overload than their counterparts, as it is between no- and pancreatic iron-overload groups. For 15 females, patients with moderate-severe hepatic iron-overload had significantly lower BMD and T-score of FN and TH, and patients with pancreatic iron-overload had significantly lower BMD, T-score of FN, and lower BMD, T-score and Z-score of TH than their counterparts. Moreover, pancreatic T2*-value was positively correlated with BMD and T-score at all analyzed sites and Z-score at TH. CONCLUSION: These data showed lower bone mass in patients with organ iron overload, particularly for LS in males, FN and TH in females. TBS may well represent a complementary tool for the evaluation of bone quality and the risk of fracture in iron-overloaded patients.
Subject(s)
Iron Overload , Osteoporosis , Osteoporotic Fractures , Male , Female , Humans , Bone Density , Cancellous Bone , Osteoporosis/etiology , Osteoporosis/complications , Absorptiometry, Photon/adverse effects , Absorptiometry, Photon/methods , Femur Neck , Lumbar Vertebrae/diagnostic imaging , Iron Overload/complications , Iron Overload/diagnostic imaging , Magnetic Resonance Imaging , IronABSTRACT
Having benefited from the combination of different therapeutic modalities, functionalized nanoplatforms with synergistic strategies have aroused great interest in anticancer treatment. Herein, an engineered, a biodegradable hollow mesoporous organosilica nanoparticle (HMON)-based nanoplatform was fabricated for photothermal-enhanced chemotherapy of tumor. For the first time, we demonstrated that HMONs could serve as nanocarriers for co-delivering of both the paclitaxel and photothermal agent new indocyanine green (IR820), denoted as Paclitaxel/IR820@ HMONs-PEG. The as-prepared nanosystem exhibited a high paclitaxel-loading capacity of 28.4%, much higher than most paclitaxel-loaded nanoformulations. Furthermore, incorporating thioether bonds (S-S) into the HMONs' framework endowed them with GSH-responsive biodegradation behavior, leading to the controllable release of drugs under a tumor reducing microenvironment, and hindered the premature release of paclitaxel. Upon being irradiated with an NIR laser, the obtained co-delivery nanosystem exhibited great photothermal properties generated from IR820. The fabricated nanocomposites could significantly suppress tumor growth under NIR laser irradiation, as validated by in vitro and in vivo assessments. Combined with outstanding biocompatibility, the constructed nanosystem holds great potential in combinational antitumor therapy.
Subject(s)
Drug Delivery Systems , Nanoparticles/chemistry , Neoplasms, Experimental/drug therapy , Organosilicon Compounds/chemistry , Paclitaxel/chemistry , Phototherapy/methods , Animals , Drug Liberation , Female , Glutathione/metabolism , Hyperthermia, Induced , Mice , Mice, Inbred BALB C , Paclitaxel/pharmacokinetics , Paclitaxel/therapeutic use , Tissue Distribution , Xenograft Model Antitumor AssaysABSTRACT
For simultaneous analysis of four fat-soluble tocopherols (α-, ß-, γ-, and δ-) in edible oils, an efficient and green method using deep eutectic solvent-based liquid-phase microextraction (DES-LPME) coupled with reversed-phase high-performance liquid chromatography (RP-HPLC) was developed. The DESs formed by different quaternary ammonium salts and ethanol were used as the extractants. Tetrabutylammonium chloride (TBAC)-ethanol DES at a molar ratio of 1:2 achieved the best extraction efficiency. Under the optimized conditions, the detection limits were in the range of 2.1-3.0 ng mL-1. The intra-day and inter-day repeatability were in the ranges of 3.9-5.3% and 4.8-7.1%, respectively, and the recoveries for the real samples varied from 80.7% to 105.4%. The developed method was successfully employed for the determination of all four tocopherol homologues with an RP-HPLC system containing a COSMOSIL π-NAP column in five edible oils collected locally. Graphical abstract.
Subject(s)
Liquid Phase Microextraction/methods , Plant Oils/analysis , Solvents/chemistry , Tocopherols/analysis , alpha-Tocopherol/analysis , beta-Tocopherol/analysis , gamma-Tocopherol/analysis , Chemistry Techniques, Analytical , Chromatography, High Pressure Liquid , Limit of Detection , Quaternary Ammonium Compounds/analysis , Reproducibility of ResultsABSTRACT
Two unusual dendrobine-type alkaloids, findlayines E and F (1, 2), along with five known dendrobine-type alkaloids (3-7), were isolated from the stems of Dendrobium findlayanum Par. et Rchb. f. Compound 1 is the first example of dendrobine-type alkaloids with a 2-ethoxy-2-oxoethyl group attaching to the C-2, and compound 2 is a nor-dendrobine-type alkaloid, featuring a 5-decarboxylated structure. The structures of compounds 1 and 2 were elucidated by means of extensive spectroscopic analyses, and their absolute configuration were confirmed by electronic circular dichroism (ECD) calculations. All isolates were evaluated for their cytotoxicity against HL-60, SMMC-7721, A-549 and MCF-7 human cancer cells.
Subject(s)
Alkaloids/pharmacology , Dendrobium/chemistry , Plant Stems/chemistry , A549 Cells , Alkaloids/isolation & purification , China , HL-60 Cells , Humans , MCF-7 Cells , Molecular Structure , Phytochemicals/isolation & purification , Phytochemicals/pharmacologyABSTRACT
The stems of Dryopteris crassirhizoma, one of the main components of Lianhua-Qingwen Formula (LQF) was traditionally used for heat-clearing and detoxifying. Dryocrassin ABBA is a key antiviral component in the herbal medicine while the compound is hard to get in large amounts with the features of homologous compounds, polyphenol groups, and low contents. Therefore, the present work aims to seek influenza H7N9 virus inhibitors from natural source by synthesis of dryocrassin ABBA and its analogues. As a result, total synthesis of the compound was achieved in nine steps with an over-all yield of 4.6%. Neuraminidases (NAs) inhibitory activities of the synthesized product and its analogues were evaluated afterward. Comparing with the positive control, OSV (9.6⯵M), it was very exciting that dryocrassin ABBA and its analogues (b5 and e2) showed better NAs inhibitory activity against Anhui H7N9 with IC50 values of 3.6⯵M, 2.5⯵M and 1.6⯵M. For the highly resistant Shanghai N9, these compounds can also show medium inhibitory activities. Docking results indicated the direct interaction of synthesized 3 hits with the key K294 by hydrogen bonds, but no direct interaction of OSV with the key K294 was observed in Shanghai N9. This study suggested that dryocrassin ABBA and its analogues especially AB, which consisted of polyphenol groups may have beneficial effects on treating avian influenza H7N9 virus.
Subject(s)
Antiviral Agents/pharmacology , Benzylidene Compounds/pharmacology , Cyclohexanones/pharmacology , Drug Resistance, Viral/drug effects , Enzyme Inhibitors/pharmacology , Influenza A Virus, H7N9 Subtype/drug effects , Neuraminidase/antagonists & inhibitors , Antiviral Agents/chemical synthesis , Antiviral Agents/chemistry , Benzylidene Compounds/chemical synthesis , Benzylidene Compounds/chemistry , Cyclohexanones/chemical synthesis , Cyclohexanones/chemistry , Dose-Response Relationship, Drug , Dryopteris/chemistry , Enzyme Inhibitors/chemical synthesis , Enzyme Inhibitors/chemistry , Influenza A Virus, H7N9 Subtype/enzymology , Microbial Sensitivity Tests , Molecular Docking Simulation , Molecular Structure , Neuraminidase/metabolism , Structure-Activity RelationshipABSTRACT
Terminthia paniculata (Sanyeqi) is widely used for treating inflammation and rheumatic arthritis in the folk areas of Yunnan province, China. Its total extract was first revealed with xanthine oxidase (XO) inhibitory activity in vitro and anti-hyperuricemic effect in vivo. Bioassay-guided separation on Fr. A5 yielded six chalcone-flavonone heterodimers, termipaniculatones A-F. Their structures were elucidated based on extensive spectroscopic analyses involving HRESIMS, 1D and 2D NMR, UV, IR and [α]D, and the absolute configuration of termipaniculatone F was verified by ECD calculation. Termipaniculatones A and E showed obvious XO inhibitory activity with IC50 values of 55.6 and 89.5⯵M, respectively, which took effects via a mix-type mode. A molecular modeling study revealed that termipaniculatone A was well located into the active site of XO by interacting with Glu802, Arg880, Thr1010 and Val1011 residues. Termipaniculatone A showed anti-hyperuricemic effects by decreasing serum uric acid levels and inhibiting XO activity in both serum and liver on potassium oxonate (PO)-induced hyperuricemia mice, and anti-inflammatory activity through alleviating paw swelling on monosodium urate (MSU)-induced mice, at the concentration of 20â¯mg/kg. This is the first time to reveal the anti-hyperuricemic and anti-acute gouty arthritis potency of T. paniculata and the characteristic biflavonoids as active constituents, which provides valuable information for searching new XO inhibitors from natural sources.
Subject(s)
Anacardiaceae/chemistry , Anti-Inflammatory Agents, Non-Steroidal/pharmacology , Arthritis, Gouty/drug therapy , Enzyme Inhibitors/pharmacology , Hyperuricemia/drug therapy , Animals , Anti-Inflammatory Agents, Non-Steroidal/chemistry , Anti-Inflammatory Agents, Non-Steroidal/isolation & purification , Arthritis, Gouty/chemically induced , Arthritis, Gouty/metabolism , Chalcone/chemistry , Chalcone/isolation & purification , Chalcone/pharmacology , Dose-Response Relationship, Drug , Edema/chemically induced , Edema/drug therapy , Enzyme Inhibitors/chemistry , Enzyme Inhibitors/isolation & purification , Flavanones/chemistry , Flavanones/isolation & purification , Flavanones/pharmacology , Hyperuricemia/chemically induced , Hyperuricemia/metabolism , Inflammation/chemically induced , Inflammation/drug therapy , Inflammation/metabolism , Male , Mice , Mice, Inbred Strains , Molecular Structure , Oxonic Acid/antagonists & inhibitors , Structure-Activity Relationship , Uric Acid/antagonists & inhibitors , Xanthine Oxidase/antagonists & inhibitors , Xanthine Oxidase/metabolismABSTRACT
RNA-Sequencing (RNA-Seq) is a newly developed method to analyze gene function and interaction at the omics level, which is widely used in frontier field in molecular biology and other fields. In recent years, this technology has been intensively used in the research of medicinal plants, and growing number of reports are published. This paper systematically sorted out relevant literatures and summarized applications of RNA-Seq technology in functional gene discovery, gene network analysis, genetic mechanism revelation and development of molecular marker of medicinal plants. Meanwhile, according to the technical characteristics of RNA-Seq and the development needs of medicinal plant research, this article brings the future prospects regarding RNA-seq technology in Chinese medicinal materials, and intending to provide inspirations for researches on Chinese materia medica based on RNA-Seq.
ABSTRACT
The similarities and differences between trigger points of myalgia and acupoints were explored. Nodules could be detected by B-ultrasound at trigger points of myalgia, but not acupoints. In clinical symptoms, the referred pain pathway of trigger points of myalgia is similar with the pathway of acupuncture meridian. Therefore, the location of trigger points of myalgia should take referred pain as pathway, which is similar with locating acupoints as meridian. Acupuncture at trigger points of myalgia takes jumping feeling as criterion, while acupuncture at acupoints are mainly based on acid swelling and numbness. From clinical observation to basic experimental research, a lot of pathophysiological evidence is provided for trigger point of myalgia. It is believed that the trigger point of myalgia might be the precise acupoint in modern scientific research, and the meridian is the synthesis of the mechanics of nerve, blood vessel and fascia. Although acupuncture and dry needling are different in theory, but the scientific foundation of TCM and western medicine is coherent.
Subject(s)
Myalgia/therapy , Acupuncture Points , Humans , Needles , Trigger PointsABSTRACT
Ten previously undescribed stilbenoids, including six bibenzyls (bleochrins A-F, 1-6), three phenanthrenes derivatives (bleochrins G-J, 7-10) along with eleven known compounds were isolated from the rhizomes of Bletilla ochracea Schltr. The structural characterizations of 1-21 were accomplished by spectroscopic data, while the absolute stereostructure of 6 was confirmed by electronic circular dichroism (ECD) data analyses. All isolated metabolites except 7 were evaluated for cytotoxic activity against five human cancer cell lines (HL-60, SMMC-7721, A-549, MCF-7 and SW480). Four isolates exhibited significant inhibitory ability against HL-60, SMMC-7721, and MCF-7 cell lines, with IC50 values ranging from 0.79 to 6.57⯵M. The isolates were tested further for inhibitory effects on the NO production of the liposaccharide (LPS)-induced RAW264.7 macrophages and showed activity with IC50 values at 15.29-24.02⯵M.
Subject(s)
Anti-Inflammatory Agents/pharmacology , Antineoplastic Agents, Phytogenic/pharmacology , Bibenzyls/pharmacology , Orchidaceae/chemistry , Phenanthrenes/pharmacology , Animals , Anti-Inflammatory Agents/isolation & purification , Antineoplastic Agents, Phytogenic/isolation & purification , Bibenzyls/isolation & purification , Cell Line, Tumor , China , Humans , Mice , Molecular Structure , Nitric Oxide/metabolism , Phenanthrenes/isolation & purification , RAW 264.7 Cells , Rhizome/chemistryABSTRACT
Four new dihydrophenanthrenofuran, bleochranols A-D (1-4), along with 21 known compounds including phenanthrenes (5-14) and bibenzyls (15-25) were isolated and elucidated from the rhizomes of Bletilla ochracea. Combination of 1D/2D NMR techniques and the Electronic Circular Dichroism (ECD) spectroscopy based on the empirical helicity rules, chemical structure of those isolates were determined. All the compounds were evaluated for cytotoxicity against HL-60, SMMC-7721, A-549, MCF-7 and SW480 human cancer cell lines by MTS assay and anti-inflammatory activity by nitric oxide (NO) production in LPS-stimulated RAW 264.7 macrophages. Among the 25 tested compounds, bleochranol A (1) showed remarkable cytotoxic activity against HL-60, A-549, and MCF-7 with IC50 values of 0.24⯱â¯0.03, 3.51⯱â¯0.09 and 3.30⯱â¯0.99⯵M respectively. The anti-inflammatory assay showed that compound 12 exhibited most potential activity against NO production in RAW 264.7 macrophages with IC50 2.86⯱â¯0.17⯵M. The results indicated that the main chemical constituents of B. ochracea were phenanthrene and bibenzyl and similar to that of B. striata.
Subject(s)
Anti-Inflammatory Agents/isolation & purification , Orchidaceae/chemistry , Stilbenes/isolation & purification , Animals , Anti-Inflammatory Agents/pharmacology , Bibenzyls/isolation & purification , Cell Line, Tumor , Humans , Mice , Molecular Structure , Nitric Oxide/metabolism , Phenanthrenes/isolation & purification , Plant Extracts/chemistry , RAW 264.7 Cells , Rhizome/chemistry , Stilbenes/pharmacologyABSTRACT
Objective To identify potential genes that may be involved in lipid metabolism in rats after treatment with aqueous extract of Arctium lappa L (burdock). Methods Rats were randomly divided into six groups: (i) control (standard diet); (ii) model group (high-fat diet only); (iii) high-fat diet and low-dose aqueous burdock root extract (2 g/kg); (iv) high-fat diet and moderate-dose aqueous burdock root extract (4 g/kg); (v) high-fat diet and high-dose aqueous burdock root extract (8 g/kg); and (vi) a positive control group exposed to a high-fat diet and simvastatin (10 mg/kg). Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis was performed to find the potential candidate genes involved in the modulation of blood lipids by treatment with aqueous burdock root extract. Results Burdock root extract reduced body weight and cholesterol levels in rats. KEGG analysis revealed 113 genes that were involved in metabolic pathways. Of these, 27 potential genes associated with blood lipid metabolism were identified. Conclusions Aqueous extract of burdock root reduced body weight and cholesterol in rats, possibly by modulating the differential expression of genes.
Subject(s)
Arctium/chemistry , Diet, High-Fat , Gene Expression Regulation , Hypolipidemic Agents/pharmacology , Lipid Metabolism/drug effects , Plant Extracts/pharmacology , Animals , Body Weight/drug effects , Cholesterol, HDL/blood , Cholesterol, LDL/blood , Encyclopedias as Topic , Gene Expression Profiling , Gene Ontology , Hypolipidemic Agents/chemistry , Lipid Metabolism/genetics , Male , Molecular Sequence Annotation , Plant Extracts/chemistry , Plant Roots/chemistry , Rats , Rats, Sprague-Dawley , Simvastatin/pharmacology , Solvents/chemistry , Triglycerides/blood , Water/chemistryABSTRACT
A new bibenzyl derivative, dendrocandin V (1) and a new sesquiterpene amino ether, wardianumine A (2), together with eleven known compounds, including phenanthrenes (denbinobin (3), 9,10-dihydro-denbinobin (4), mostatin (5), loddigesiinols A (6)), bibenzyls (moscatilin (7), 5-hydroxy-3,4'-dimethoxybibenzyl (8), 3,4-dihydroxy-5,4'-dimethoxy bibenzyl (9), dendrocandin A (10), gigantol (11), dendrocandin U (12)) and an alkaloids (dihydroshihunine, 13) were isolated from the EtOH extraction of stems of Dendrobium wardianum Warner. Isolation of the new compound 2 indicated that N,N-dimethylethanolamine as the key adduction in the synthesis of dendroxine and its analogs in Dendrobium species. The hypothetical biosynthetic pathway of 2 was then postulated. Inspired by literature and traditional usage of the herbal medicine, some compounds were sent for cytotoxic activity and the results indicated that compounds 1, 3, 4, 5 showed cytotoxic activities against five human cancer cell lines (HL-60, A-549, SMMC-7721, MCF-7, and SW-480) with IC50 from 2.33-38.48µM. Among those compounds, 3 and 4 showed cell line selectivity with strong activity comparable to DDP.
Subject(s)
Dendrobium/chemistry , Ethers/chemistry , Phenols/chemistry , Sesquiterpenes/chemistry , Antineoplastic Agents, Phytogenic/chemistry , Antineoplastic Agents, Phytogenic/isolation & purification , Cell Line, Tumor , Drug Screening Assays, Antitumor , Ethers/isolation & purification , Humans , Molecular Structure , Phenols/isolation & purification , Plant Stems/chemistry , Plants, Medicinal/chemistry , Sesquiterpenes/isolation & purificationABSTRACT
Three new triterpenoids, patrinolides B-D (1-3), and two new iridoids, patriscabioins K-L (9-10), together with five known compounds (4-8) were isolated from the extract of the whole plants of Patrinia scabiosaefolia. Compounds 1, 9, and 10 contained the unique substituents in Valerianaceae family, such as isovalery and 3-methylcrotonyl. Compound 2 was a 24-nor-ursane triterpenoid. Their structures were established on the basis of extensive spectroscopic analysis (UV, IR, MS, 1D and 2D NMR). The inhibitory activities against nitric oxide synthase (NOS) of all triterpenoids were tested. The results showed that compound 4 had moderate inhibitory activity with IC50 of 10.1µM. Furthermore, it also showed strongest inhibitory activities on AChE with IC50 values of 10.0µM.
Subject(s)
Iridoids/chemistry , Patrinia/chemistry , Triterpenes/chemistry , Animals , Cholinesterase Inhibitors/chemistry , Cholinesterase Inhibitors/isolation & purification , Iridoids/isolation & purification , Macrophages/drug effects , Macrophages/enzymology , Mice , Molecular Structure , Nitric Oxide/metabolism , Nitric Oxide Synthase/antagonists & inhibitors , RAW 264.7 Cells , Triterpenes/isolation & purificationABSTRACT
(±)-Uncarilins A and B (1a/1b and 2a/2b), two pairs of unusual dimeric isoechinulin-type enantiomers with a symmetric four-membered core, were isolated from Uncaria rhynchophylla driven by LCMS-IT-TOF analyses. Their structures were elucidated by extensive 1D and 2D NMR spectra, X-ray diffraction, and ECD spectroscopic data. (-)-Uncarilin B (2a) showed activities on MT1 and MT2 receptors with agonistic rates of 11.26% and 52.44% at a concentration of 0.25 mM.
Subject(s)
Drugs, Chinese Herbal/isolation & purification , Indole Alkaloids/isolation & purification , Uncaria/chemistry , Drugs, Chinese Herbal/chemistry , Humans , Indole Alkaloids/chemistry , Indoles , Molecular Structure , Nuclear Magnetic Resonance, Biomolecular , Receptor, Melatonin, MT1/agonists , Receptor, Melatonin, MT2/agonists , StereoisomerismABSTRACT
The new melokhanines A-J (1-10) and 22 known (11-32) alkaloids were isolated from the twigs and leaves of Melodinus khasianus. The new compounds and their absolute configurations were elucidated by extensive analysis of spectroscopic, X-ray diffraction, and computational data. Melokhanine A (1), composed of a hydroxyindolinone linked to an octahydrofuro[2,3-b]pyridine moiety, is an unprecedented monoterpenoid indole alkaloid. Melokhanines B-H (2-8) possess a new 6/5/5/6/6 pentacyclic indole alkaloid skeleton. Alkaloids 1-16, 25-27, 31, and 32 showed the best antibacterial activity against Pseudomonas aeruginosa (MIC range 2-22 µM). Among the seven dermatophytes tested, compound 1 showed significant inhibitory activity against Microsporum canis, M. ferrugineum, and Trichophyton ajelloi (MIC range 38-150 µM), i.e., half the efficacy of the positive control, griseofulvin.
Subject(s)
Apocynaceae/chemistry , Drugs, Chinese Herbal/chemistry , Drugs, Chinese Herbal/pharmacology , Secologanin Tryptamine Alkaloids/chemistry , Secologanin Tryptamine Alkaloids/pharmacology , Crystallography, X-Ray , Drug Screening Assays, Antitumor , Drugs, Chinese Herbal/isolation & purification , Escherichia coli/drug effects , Griseofulvin/pharmacology , Microbial Sensitivity Tests , Microsporum/drug effects , Molecular Conformation , Molecular Structure , Nuclear Magnetic Resonance, Biomolecular , Plant Leaves/chemistry , Plant Stems/chemistry , Pseudomonas aeruginosa/drug effects , Secologanin Tryptamine Alkaloids/isolation & purification , Trichophyton/drug effectsABSTRACT
The previously reported procedure for the determination of the total phthalate in fatty food involved the extraction of phthalates using chloroform/methanol followed by the removal of the solvents before alkaline hydrolysis requiring 20 h and derivatization of phthalic acid. In this study, a phase-transfer catalyst (tetrabutylammonium chloride) was used in the liquid-liquid heterogeneous hydrolysis of phthalates in oil matrix shortening the reaction time to within 25 min. The resulting phthalic acid in the hydrolysate was extracted by a novel molecular complex based dispersive liquid-liquid microextraction method coupled with back-extraction before high-performance liquid chromatography coupled with photodiode array detection. Under the optimal experimental conditions, the linearity of the method was in the range of 0.5-12 nmol/g with the correlation coefficients (r) >0.997. The detection limit (S/N = 3) was 0.11 nmol/g. Intraday and interday repeatability values expressed as relative standard deviation were 3.9 and 7.1%, respectively. The recovery rates ranged from 82.4 to 99.0%. The developed method was successfully applied for the analysis of total phthalate in seven edible oils.
Subject(s)
Chromatography, High Pressure Liquid/methods , Phthalic Acids/analysis , Plant Oils/chemistry , Chromatography, High Pressure Liquid/instrumentation , Food Contamination/analysis , Liquid Phase Microextraction , Phthalic Acids/isolation & purificationABSTRACT
OBJECTIVE: To use the technique of magnetic resonance imaging (MRI) T2* mapping to diagnose and follow-up of patients with iron overload. METHODS: 107 patients who were suspected to have iron overload between 2011.7-2014.3 in Peking Union Medical Colleague Hospital were analyzed retrospectively. Patients had the document of MRI T2* value of liver, heart and pancreas, serum ferritin (SF), transferrin saturation (TS), transfusion amount and other related laboratory tests. T2* values were compared with SF and transfusion amount. T2* values in different organs and their relationship with SF were also evaluated. 10 patients who had been adequately chelated for more than half a year were followed up for their SF and T2* values. RESULTS: There were 65 males and 42 females with the median age of 51(8-77)-year-old. They were 50 myelodysplastic syndromes (MDS), 36 aplastic anemia, 10 myelofibrosis, 7 hemachromatosis and 4 thalassemia carriers. Liver T2* value was significantly related to SF (r=0.120, P=0.001), but not related to transfusion amount (r=0.019, P=0.175), whereas cardiac MRI T2* was not related either to SF or to transfusion amount. No correlation of the T2* value was found between liver and heart (r=0.015, P=0.235). 70 patients was detected for liver, heart and pancreas T2* simultaneously. Pancreas T2* was compatible to SF (r=0.061ï¼P=0.039) and cardiac T2* (r=0.110, P=0.005), but not correlated to heptic T2* (r=0.047, P= 0.071) or transfusion amount (r=0.000, P=0.960). For the 10 well-chelated patients, during the half year follow-up period, SF changed significantly from (2 566.5±1 152.2) µg/L before chelation to (1 473.4±803.0) µg/L after chelation(P=0.001), while liver T2* remained the same [(6.0±5.1) ms, (6.3±6.0) ms respectively, P=0.629]. CONCLUSION: MRI, although related to SF to some extent, was a valuable additional methods for quantifying iron overload. Iron deposition in different organs might be not related to each other and needed to be evaluated separately. Well-chelation therapy could change SF in half-year follow-up, but T2* change needed longer time to follow-up.