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1.
Int J Surg Case Rep ; 124: 110346, 2024 Sep 25.
Article de Anglais | MEDLINE | ID: mdl-39326370

RÉSUMÉ

INTRODUCTION: This report presents a rare case of a dentigerous cyst (DC) associated with the maxillary right canine in a young child, successfully treated with marsupialization followed by enucleation. PRESENTATION OF CASE: A 9-year-old girl was referred to a maxillofacial hospital after routine dental exam revealed a large lesion in maxilla. Radiograph showed a 5 × 6 cm unilocular radiolucent lesion in the right maxillary sinus, with destruction of the sinus and nasal cavity walls and displacement of the upper right canine into the floor of the right eye. Marsupialization was performed, and the patient was monitored every 6 months. Histology confirmed a dentigerous cyst lined with non-keratinized stratified cuboidal squamous epithelium. One-year post-surgery, the cyst had significantly reduced in size, and the canine had descended. A second surgery was performed to completely remove the cyst and the associated canine. DISCUSSION: This case demonstrates the successful management of a large dentigerous cyst in a 9-year-old patient through staged treatment, initially with marsupialization, followed by complete cyst removal. The conservative approach allowed for the reduction of the cyst size and facilitated the natural descent of the displaced canine. Regular follow-up and timely surgical intervention were crucial in achieving a positive outcome and preventing recurrence. CONCLUSION: This case highlights the effectiveness of marsupialization in managing maxillary dentigerous cysts in young children.

2.
J Nat Med ; 78(4): 908-918, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-38955955

RÉSUMÉ

A phytochemical investigation of Kaempferia champasakensis rhizomes led to the isolation of five new pimarane diterpenes, kaempferiols E-I (1-5). The structures of 1-5 were elucidated by extensive spectroscopic techniques, including HR-ESI-MS, UV, IR, and 1D and 2D NMR. The absolute configurations of 1-3 were determined by the modified Mosher method, and those of 4 and 5 were established by ECD calculations. Further cytotoxic assay for all isolated compounds against three human cancer cell lines, lung cancer (A549), cervical cancer (HeLa), and breast cancer (MCF-7) indicated that 5 showed moderate cytotoxic activities against the three tested cell lines, with IC50 values of 44.78, 25.97, and 41.39 Mµ for A549, HeLa, and MCF-7 cell lines, respectively.


Sujet(s)
Abiétanes , Antinéoplasiques d'origine végétale , Rhizome , Zingiberaceae , Humains , Zingiberaceae/composition chimique , Abiétanes/composition chimique , Abiétanes/pharmacologie , Abiétanes/isolement et purification , Antinéoplasiques d'origine végétale/pharmacologie , Antinéoplasiques d'origine végétale/composition chimique , Structure moléculaire , Rhizome/composition chimique , Lignée cellulaire tumorale , Cellules MCF-7 , Diterpènes/composition chimique , Diterpènes/pharmacologie , Diterpènes/isolement et purification , Tests de criblage d'agents antitumoraux , Cellules HeLa , Spectroscopie par résonance magnétique , Cellules A549
3.
Molecules ; 29(12)2024 Jun 12.
Article de Anglais | MEDLINE | ID: mdl-38930872

RÉSUMÉ

This study is the first to investigate the chemical composition and antioxidant, anti-inflammatory, and cytotoxic activities of Peperomia leptostachya leaf oil. A yellow oil was obtained through hydro-distillation, with a yield of 0.1% (w/w). The GC-MS analysis revealed 66 compounds, constituting 99.6% of the oil. Sesquiterpene hydrocarbons predominated (70.4%), followed by monoterpene hydrocarbons (13.2%), oxygenated sesquiterpenes (12.4%), non-terpenic compounds (2.0%), and oxygenated monoterpenes (1.6%). Major constituents included germacrene D (25.1%), (E)-caryophyllene (17.4%), bicyclogermacrene (6.6%), α-pinene (6.2%), and ß-pinene (4.7%). The assessment of antioxidant capacity via 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging assay yielded a weak effect, with an IC50 value > 100 µg/mL. The inhibition of lipopolysaccharide-induced nitric oxide production in RAW 264.7 cells was quantified using the MTT assay, showing an IC50 value of 15.15 ± 0.68 µg/mL. Furthermore, cytotoxic effects on SK-LU-1 cell line growth were evaluated using the sulforhodamine B assay, resulting in an IC50 value of 37.45 ± 2.43 µg/mL. The anti-inflammatory activity was notable among the analyzed bioactivities of this oil. By employing a computational model, the predominant secondary metabolites in the essential oil were selected as candidates for interaction analysis with cyclooxygenase-2, an enzyme implicated in the inflammatory response. Our findings suggest that P. leptostachya leaf oil could serve as a potential source of natural compounds with prospective therapeutic effects in treating inflammatory conditions.


Sujet(s)
Anti-inflammatoires , Antioxydants , Huile essentielle , Peperomia , Animaux , Souris , Anti-inflammatoires/pharmacologie , Anti-inflammatoires/composition chimique , Antioxydants/pharmacologie , Antioxydants/composition chimique , Simulation numérique , Chromatographie gazeuse-spectrométrie de masse , Monoxyde d'azote/métabolisme , Huile essentielle/pharmacologie , Huile essentielle/composition chimique , Peperomia/composition chimique , Feuilles de plante/composition chimique , Cellules RAW 264.7 , Vietnam
4.
J Nat Med ; 78(3): 537-546, 2024 Jun.
Article de Anglais | MEDLINE | ID: mdl-38517624

RÉSUMÉ

A phytochemical investigation of Kaempferia champasakensis rhizomes led to the isolation of a new 3,4-seco-isopimarane diterpene, kaempferiol A (1), and three new isopimarane diterpenes, kaempferiols B-D (2-4), together with six known isopimarane diterpenes (5-10). The structures of 1-4 were elucidated by extensive spectroscopic analyses, including HR-ESI-MS, UV, IR, and 1D and 2D NMR. The absolute configurations of 1, 3, and 4 were determined by ECD calculations, while that of 2 was established using the modified Mosher method. All isolated compounds were tested for cytotoxicity against three human cancer cell lines, lung cancer (A549), cervical cancer (HeLa), and breast cancer (MCF-7). Among them, 6 and 7 showed moderate cytotoxic activities against the three tested cell lines, with IC50 values ranging from 38.04 to 27.77 µM, respectively.


Sujet(s)
Antinéoplasiques d'origine végétale , Diterpènes , Zingiberaceae , Humains , Diterpènes/composition chimique , Diterpènes/pharmacologie , Diterpènes/isolement et purification , Zingiberaceae/composition chimique , Vietnam , Structure moléculaire , Antinéoplasiques d'origine végétale/pharmacologie , Antinéoplasiques d'origine végétale/composition chimique , Lignée cellulaire tumorale , Rhizome/composition chimique , Extraits de plantes/composition chimique , Extraits de plantes/pharmacologie
5.
Chem Biodivers ; 20(12): e202301482, 2023 Dec.
Article de Anglais | MEDLINE | ID: mdl-37899310

RÉSUMÉ

A new phenolic derivative, galeomalate A (1), together with five known structurally related compounds (2-6), was isolated from the ethyl acetate extract of Galeola nudifolia collected in Vietnam. The structures were elucidated by various spectroscopic methods, including 1D and 2D NMR, HR-ESI-TOF-MS, and CD data, and chemical conversion of the sugar moiety. All isolated compounds possessed acetylcholinesterase (AChE) inhibitory activities in a dose-dependent manner. Among them, compounds 2 and 3 exhibited the first and second highest inhibitory activity on AChE with IC50 values of 122.13 and 125.49 µM, respectively. Compounds 1 and 4-6 inhibited the AChE activity by mixed modes of action comprising competitive and non-competitive modes, whereas 2 and 3 exerted their inhibitory activities in a competitive manner. Molecular docking analyses suggested that the phenyl-ß-D-glucopyranoside unit of 2 and 3 bound to the active site of AChE for the competitive inhibitory activities, while the mixed inhibitory activity of 4 was due to the two binding patterns in the active-site and the active-site entrance of AChE. Furthermore, the docking studies indicated that 1, 5, and 6 would inhibit AChE in a mixed inhibitory manner by adopting three distinct binding patterns of the additional phenyl-ß-D-glucopyranoside unit at the active-site entrance.


Sujet(s)
Acetylcholinesterase , Anticholinestérasiques , Acetylcholinesterase/métabolisme , Anticholinestérasiques/pharmacologie , Anticholinestérasiques/composition chimique , Simulation de docking moléculaire , Vietnam , Extraits de plantes/pharmacologie , Extraits de plantes/composition chimique , Phénols/pharmacologie
6.
Environ Monit Assess ; 195(8): 963, 2023 Jul 17.
Article de Anglais | MEDLINE | ID: mdl-37458829

RÉSUMÉ

Soil factors, especially metal elements in the soil, play a significant role in forming and accumulating secondary metabolites, which determine the medicinal properties of medicinal herbs. In this study, the concentrations of some metal elements (K, Mn, Fe, Cu, Zn, and Cr) in Cam Mountain and Tinh Bien Town, An Giang Province, Vietnam, were determined using the XRF method. We simultaneously determined the total phenolic and flavonoid content of some medicinal herbs collected from the collected soil sample areas, thereby assessing the influence of these elements on the formation of secondary metabolites in medicinal plants. The results showed that K, Mn, and Cr were mainly concentrated in the topsoil and transition layers; Fe and Cu elements tended to concentrate in the transition layer and the subsoil when surveying the soil profile. K, Mn, Cu, and Cr concentrations were more focused in Tinh Bien area, while Fe and Zn had higher concentrations at Cam Mountain. Additionally, results from evaluating the relationship between the content of the elements in the soil and the content of two active compounds also showed the correlation regression model between Zn and flavonoid expression by level 4 at the 5% significance level. Thus, the nonlinear model is suitable for evaluating the relationship between the content of metal elements in the soil and the active compound in medicinal plants.


Sujet(s)
Métaux lourds , Plantes médicinales , Polluants du sol , Sol , Rayons X , Fluorescence , Surveillance de l'environnement , Polluants du sol/analyse , Métaux , Métaux lourds/analyse
7.
RSC Adv ; 13(8): 5509-5528, 2023 Feb 06.
Article de Anglais | MEDLINE | ID: mdl-36793301

RÉSUMÉ

Wound healing is vital to maintain the physiological functions of the skin. The most common treatment is the use of a dressing to cover the wound and reduce infection risk and the rate of secondary injuries. Modern wound dressings have been the top priority choice for healing various types of wounds owing to their outstanding biocompatibility and biodegradability. In addition, they also maintain temperature and a moist environment, aid in pain relief, and improve hypoxic environments to stimulate wound healing. Due to the different types of wounds, as well as the variety of advanced wound dressing products, this review will provide information on the clinical characteristics of the wound, the properties of common modern dressings, and the in vitro, in vivo as well as the clinical trials on their effectiveness. The most popular types commonly used in producing modern dressings are hydrogels, hydrocolloids, alginates, foams, and films. In addition, the review also presents the polymer materials for dressing applications as well as the trend of developing these current modern dressings to maximize their function and create ideal dressings. The last is the discussion about dressing selection in wound treatment and an estimate of the current development tendency of new materials for wound healing dressings.

8.
Sci Rep ; 13(1): 1545, 2023 01 27.
Article de Anglais | MEDLINE | ID: mdl-36707691

RÉSUMÉ

Lung cancer is one of the leading cancers and causes of cancer-related deaths worldwide. Due to its high prevalence and mortality rate, its clinical management remains a significant challenge. Previously, the in vitro anticancer activity of Aspiletrein A, a steroid and a saponin from Aspidistra letreae, against non-small cell lung cancer (NSCLC) cells was reported. However, the anticancer molecular mechanism of other Aspiletreins from A. letreae remains unknown. Using in silico network pharmacology approaches, the targets of Aspiletreins were predicted using the Swiss Target Prediction database. In addition, key mediators in NSCLC were obtained from the Genetic databases. The compound-target interacting networks were constructed using the STRING database and Cytoscape, uncovering potential targets, including STAT3, VEGFA, HSP90AA1, FGF2, and IL2. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analysis demonstrated that several pathways were highly relevant to cancer pathogenesis. Additionally, molecular docking and molecular dynamic analyses revealed the interaction between key identified targets and Aspiletreins, including hydrogen bonding and Van der Waals interaction. This study provides potential targets of Aspiletreins in NSCLC, and its approach of integrating network pharmacology, bioinformatics, and molecular docking is a powerful tool for investigating the mechanism of new drug targets on a specific disease.


Sujet(s)
Asparagaceae , Carcinome pulmonaire non à petites cellules , Médicaments issus de plantes chinoises , Tumeurs du poumon , Carcinome pulmonaire non à petites cellules/traitement médicamenteux , Carcinome pulmonaire non à petites cellules/génétique , Tumeurs du poumon/traitement médicamenteux , Tumeurs du poumon/génétique , Simulation de docking moléculaire , Pharmacologie des réseaux , Saponines/pharmacologie
9.
Phytochemistry ; 205: 113510, 2023 Jan.
Article de Anglais | MEDLINE | ID: mdl-36379318

RÉSUMÉ

Three undescribed 9,10-seco-isopimarane diterpenoids, marginols I-K, and an unprecedent isopimara-8(9),15-diene diterpene, 14-epi-boesenberol F, together with a known 9,10-seco-isopimarane diterpenoid, kaemgalangol A, were isolated from the rhizomes of Vietnamese Kaempferia marginata. Marginols I and J contained a naturally very rare 6-oxabicyclo[3.2.1]octane-5-ol ring, while marginol K had a naturally rare oxepan-2-one ring in its structure. The unprecedented structures were elucidated by spectroscopic techniques, including HR-ESI-TOF-MS, UV, IR, and 1D and 2D NMR. The absolute configurations of marginols I-K and 14-epi-boesenberol F were determined by ECD calculations. The NO production inhibitory assay revealed that the isolated compounds, except marginol J, exhibited NO inhibitory activities with IC50 values ranging from 65.06 to 87.70 µM against lipopolysaccharide (LPS)-induced RAW264.7 cells.


Sujet(s)
Abiétanes , Vietnam
10.
Polymers (Basel) ; 14(22)2022 Nov 18.
Article de Anglais | MEDLINE | ID: mdl-36433125

RÉSUMÉ

In the gastric mucosa, chronic inflammation due to Helicobacter pylori infection promotes gastrocarcinogenesis. Polysaccharides of Caulerpa lentillifera are well-characterized by broad antimicrobial activity and anti-inflammatory potentials. The present study was undertaken to investigate whether the low molecular sulfate polysaccharides of C. lentillifera (CLCP) exhibit any anti-adhesive activity against H. pylori. After a hot water extraction and purification process, two purified polysaccharide fractions (CLCP-1 and CLCP2) were studied based on structural characterization and bioactivity determination. The results implied that except for the molar ratio, CLCP-1 and CLCP-2 contain high sulfate, mannose, galactose, xylose, glucose levels, and low protein levels. The molecular weight and Fourier transform infrared spectroscopy (FT-IR) assays confirmed that CLCP-1 and CLCP-2 are sulfate polysaccharides with an average molecular weight (Mw) of 963.15 and 648.42 kDa, respectively. In addition, CLCP-1 and CLCP-2 exhibited stronger antibacterial activity against H. pylori. CLCP-1 and CLCP-2 could significantly promote macrophage proliferation and decrease the production of nitric oxide (NO) through downregulated expression of inducible nitric oxide synthase (iNOS). Meanwhile, CLCP-1 and CLCP-2 in this study showed efficiently protected gastric adenocarcinoma (AGS) cells against H. pylori with the inhibition of the IL-8/NF-κB axis. These findings suggested the effect of Caulerpa lentillifera polysaccharides on H. pylori adhesion, a potential supply of nutrients for eradication therapy through the reduction of cell count and inflammation.

11.
Int J Mol Sci ; 23(16)2022 Aug 17.
Article de Anglais | MEDLINE | ID: mdl-36012522

RÉSUMÉ

Lung cancer remains a leading cause of death in cancer patients, and deregulation of apoptosis is a serious concern in clinical practice, even though therapeutic intervention has been greatly improved. Plants are a versatile source of biologically active compounds for anticancer drug discovery, and aspiletrein A (AA) is a steroidal saponin isolated from Aspidistra letreae that has a potent cytotoxic effect on various cancer cell lines. In this study, we investigated and determined the underlying molecular mechanism by which AA induces apoptosis. AA strongly induced apoptosis in NSCLC cells by mediating ROS generation and thereby activating AMP-activated protein kinase (AMPK) signaling. Consequently, downstream signaling and levels of phosphorylated mTOR and Bcl-2 were significantly decreased. Pretreatment with either an antioxidant, N-acetylcysteine, or an AMPK inhibitor, compound C, could reverse the apoptosis-inducing effect and counteract the effect of AA on the AMPK signaling pathway. Decreased levels of Bcl-2 were due to AA-mediating Bcl-2 degradation via a ROS/AMPK/mTOR axis-dependent proteasomal mechanism. Consistently, the apoptotic-inducing effect of AA was also observed in patient-derived malignant lung cancer cells, and it suppressed an in vitro 3D-tumorigenesis. This study identified the underlying mechanism of AA on lung cancer apoptosis, thereby facilitating potential research and development of this compound for further clinical implications.


Sujet(s)
Carcinome pulmonaire non à petites cellules , Tumeurs du poumon , AMP-Activated Protein Kinases/métabolisme , Apoptose , Carcinome pulmonaire non à petites cellules/traitement médicamenteux , Carcinome pulmonaire non à petites cellules/métabolisme , Lignée cellulaire tumorale , Humains , Tumeurs du poumon/traitement médicamenteux , Tumeurs du poumon/métabolisme , Protéines proto-oncogènes c-bcl-2 , Espèces réactives de l'oxygène/métabolisme , Sérine-thréonine kinases TOR/métabolisme
12.
Chem Biodivers ; 19(4): e202100882, 2022 Apr.
Article de Anglais | MEDLINE | ID: mdl-35146904

RÉSUMÉ

Four compounds, luteolin (1), 6-γ,γ-dimethylallylquercetin 7-O-ß-D-glucopyranoside (2), 6-γ,γ-dimethylallylkaempferol 7-O-ß-D-glucopyranoside (3), and 6-γ,γ-dimethylallyldihydrokaempferol 7-O-ß-D-glucoside (4), were isolated for the first time from AcOEt extract of the O. integerrima flower. We then evaluated the antioxidant effects of AcOEt, butanol, and MeOH extracts and their effects on H2 O2 against oxidative stress in HaCaT keratinocyte cell lines. Furthermore, 2,2-diphenyl-1-picrylhydrazyl hydrate (DPPH⋅) radical scavenging activities of 1-4 were determined and their mechanisms of action on tyrosinase were predicted by in silico studies. The results revealed that the AcOEt extract and 1-3 exhibited good DPPH⋅ radical scavenging activity. Furthermore, this extract also had a significant protective effect against H2 O2 -induced oxidative stress in HaCaT cells. In silico studies indicated that the activity of 1-3 may be due to tyrosinase inhibition with MM-GBSA free binding energies of -78.9, -70.1, and -71.1 kcal mol-1 , respectively, compared to 4 with an energy -56.9 kcal mol-1 .


Sujet(s)
Antioxydants , Ochnaceae , Antioxydants/composition chimique , Antioxydants/pharmacologie , Fleurs , Kératinocytes , Monophenol monooxygenase , Extraits de plantes/composition chimique , Extraits de plantes/pharmacologie
13.
Anal Methods ; 14(8): 850-858, 2022 02 24.
Article de Anglais | MEDLINE | ID: mdl-35166283

RÉSUMÉ

Using waste materials to extract biologically active ingredients with green solvents is a new trend for sustainable development. Herein, different types of deep eutectic solvents (DESs) and surfactant solvents (SSs) were used to extract curcumin from turmeric residues (TRs), among which choline chloride-propylene glycol (ChCl-Pro) showed the highest yield. The optimized extraction conditions included a ChCl : Pro ratio of 1 : 2, water content in the DESs of 20%, solid : liquid ratio of 1 : 40 maintained for 60 min at 50 °C, and a TR particle size of 0.18 mm. The extraction yield was 54.2 mg g-1, which was 1.31 times higher than when methanol was used as a solvent. Distilled water was used to recover curcumin from the DES extract with a recovery yield of 99.7%. Furthermore, the antioxidant and acetylcholinesterase (AChE) inhibitory activities of the recovered curcumin were evaluated, with IC50 values of 25.58 ± 0.51 and 19.12 ± 0.83 µg mL-1, respectively. This study highlights the promising potential of using green solvents to extract bioactive compounds from waste materials.


Sujet(s)
Curcuma , Curcumine , Acetylcholinesterase , Curcuma/composition chimique , Curcumine/isolement et purification , Solvants eutectiques profonds , Solvants/composition chimique , Tensioactifs
14.
Phytochemistry ; 196: 113109, 2022 Apr.
Article de Anglais | MEDLINE | ID: mdl-35091214

RÉSUMÉ

Kaempferia marginata rhizomes are used as an herb in food and as traditional medicine for the treatment of inflammatory-related diseases in Asian countries. In contrast to the previously reported phytochemical investigation of Thai and Chinese K. marginata rhizomes, which demonstrated the presence of sandaracopimaradiene and ent-sandaracopimaradiene, our first investigation of Vietnamese K. marginata rhizomes led to the isolation of eight undescribed pimarane diterpenoids, marginols A‒H, along with 18 known pimarane diterpenoids. The structures of these compounds were elucidated by spectroscopic techniques, including 1D and 2D NMR, HRESIMS, and CD spectroscopy and/or by comparisons of their NMR data with previously reported data. Furthermore, evaluations of the NO production inhibitory activity against LPS-stimulated RAW264.7 cells revealed that the undescribed compounds, marginols B and D‒G, and the known compounds, sandaracopimaradien-6ß,9α-diol-1-one and 6-acetoxysandaracopimardien-9-ol-1-one, showed potent activities. These results provide insights into the chemodiversity of Vietnamese K. marginata rhizomes as well as their traditional usage from the viewpoint of their chemical constituents.


Sujet(s)
Diterpènes , Zingiberaceae , Abiétanes/composition chimique , Abiétanes/pharmacologie , Diterpènes/composition chimique , Structure moléculaire , Rhizome/composition chimique , Thaïlande , Zingiberaceae/composition chimique
15.
Planta Med ; 88(11): 913-920, 2022 Sep.
Article de Anglais | MEDLINE | ID: mdl-34474490

RÉSUMÉ

Three new flavanols, (2R,3S)-7-methoxy-flavan-3-ol (1: ), (2R,3S)-7-hydroxy-flavan-3-ol (2: ), and (2R,3S)-2'-hydroxy-7-methoxy-flavan-3-ol (3: ), together with two known flavans (4: and 5: ), were isolated from the chloroform extract of Crinum asiaticum. Their structures were elucidated by various spectroscopic methods, including 1D and 2D NMR, HR-ESI-MS, and CD data. The isolated compounds 1: and 3: -5: showed inhibitory activity toward LPS-induced nitric oxide (NO) production. Further investigation of the NF-κB pathway mechanisms indicated that 1: and 3: -5: inhibited the LPS-induced IL-6 production and p65 subunit phosphorylation of NF-κB in RAW264.7 cells, with an effective dose of 10 µM.


Sujet(s)
Crinum , Flavonoïdes/composition chimique , Facteur de transcription NF-kappa B , Animaux , Crinum/métabolisme , Lipopolysaccharides/pharmacologie , Souris , Facteur de transcription NF-kappa B/métabolisme , Monoxyde d'azote/métabolisme , Nitric oxide synthase type II/métabolisme , Polyphénols , Cellules RAW 264.7 , Transduction du signal
16.
Molecules ; 26(17)2021 Sep 03.
Article de Anglais | MEDLINE | ID: mdl-34500805

RÉSUMÉ

Panax vietnamensis, or Vietnamese ginseng (VG), an endemic Panax species in Vietnam, possesses a unique saponin profile and interesting biological activities. This plant is presently in danger of extinction due to over-exploitation, resulting in many preservation efforts towards the geographical acclimatization of VG. Yet, no information on the saponin content of the acclimatized VG, an important quality indicator, is available. Here, we analyzed the saponin content in the underground parts of two- to five-year-old VG plants acclimatized to Lam Dong province. Nine characteristic saponins, including notoginsenoside-R1, ginsenoside-Rg1, -Rb1, -Rd, majonoside-R1, -R2 vina-ginsenoside-R2, -R11, and pseudoginsenoside-RT4, were simultaneously determined by HPLC coupled with UV and with a charged aerosol detector (CAD). Analyzing the results illustrated that the detection of characteristic ocotillol-type saponins in VG by CAD presented a superior capacity compared with that of UV, thus implying a preferential choice of CAD for the analysis of VG. The quantitative results indicating the saponin content in the underground parts of VG showed an increasing tendency from two to five years old, with the root and the rhizome exhibiting different saponin accumulation patterns. This is the first study that reveals the preliminary success of VG acclimatization and thereby encourages the continuing efforts to develop this valuable saponin-rich plant.


Sujet(s)
Panax/composition chimique , Saponines/analyse , Chromatographie en phase liquide à haute performance , Rayons ultraviolets , Vietnam
17.
Biomed Res Int ; 2021: 6624347, 2021.
Article de Anglais | MEDLINE | ID: mdl-33880371

RÉSUMÉ

Distichochlamys benenica is a native black ginger that grows in Vietnam. In point of fact, there is limitation of available information in the literature making mention of the chemical constituents and bioactive properties of this plant. This study is aimed at isolating trans-o-coumaric acid (1), trans-cinnamic acid (2), and borneol (3) from the rhizomes of D. benenica Q.B.Nguyen & Skornick and evaluate the anti-inflammatory and antimicrobial activities of 1-3 using the carrageenan paw edema model and the dilution broth method, respectively. This revealed that 1 was as effective as diclofenac in reducing the intensity of the edema development. The in silico research showed that the activity of 1 might be derived from inhibiting COX-2 by generating h-bonds at the positions of Arg 120, Tyr 355, and Arg 513 residues. The antimicrobial activities against Gram-positive strains (Staphylococcus aureus and Bacillus subtilis) were comparable, with the minimum inhibitory concentrations ranging from 1.52 to 3.37 mM. This is the first study of the bioactivity of compounds isolated from D. benenica Q.B.Nguyen & Skornick. Our results suggest that 1 may be a nature-derived compound which demonstrates the anti-inflammatory properties and inhibit the proliferation of several Gram-positive bacteria.


Sujet(s)
Anti-infectieux/pharmacologie , Anti-inflammatoires/pharmacologie , Composés phytochimiques/isolement et purification , Composés phytochimiques/pharmacologie , Zingiberaceae/composition chimique , Animaux , Anti-infectieux/composition chimique , Anti-inflammatoires/composition chimique , Anti-inflammatoires/usage thérapeutique , Bactéries/effets des médicaments et des substances chimiques , Sites de fixation , Carragénane , Acides coumariques/composition chimique , Acides coumariques/pharmacologie , Acides coumariques/usage thérapeutique , Cyclooxygenase 2/métabolisme , Diclofenac/administration et posologie , Diclofenac/pharmacologie , Diclofenac/usage thérapeutique , Oedème/traitement médicamenteux , Oedème/anatomopathologie , Souris , Tests de sensibilité microbienne , Simulation de docking moléculaire , Simulation de dynamique moléculaire , Composés phytochimiques/composition chimique , Composés phytochimiques/usage thérapeutique
18.
BMC Complement Med Ther ; 21(1): 87, 2021 Mar 09.
Article de Anglais | MEDLINE | ID: mdl-33750378

RÉSUMÉ

BACKGROUND: Lung cancer is one of the leading causes of death worldwide due to its strong proliferative and metastatic capabilities. The suppression of these aggressive behaviors is of interest in anticancer drug research and discovery. In recent years, many plants have been explored in order to discover new bioactive secondary metabolites to treat cancers or enhance treatment efficiency. Aspiletrein A (AA) is a steroidal saponin isolated from the whole endemic species Aspidistra letreae in Vietnam. Previously, elucidation of the structure of AA and screening of its cytotoxic activity against several cancer cell lines were reported. However, the antitumor activities and mechanisms of action have not yet been elucidated. In this study, we demonstrated the anti-proliferative, anti-migrative and anti-invasive effects of AA on H460, H23 and A549 human lung cancer cells. METHODS: MTT, wound healing and Transwell invasion assays were used to evaluate the anti-proliferation, anti-migration and anti-invasion effects of AA, respectively. Moreover, the inhibitory effect of AA on the activity of protein kinase B (Akt), a central mediator of cancer properties, and apoptotic regulators in the Bcl-2 family proteins were investigated by Western blotting. RESULTS: AA exhibits antimetastatic effects in human lung cancer cells through the inhibition of the pAkt/Akt signaling pathway, which in turn resulted in a significant inhibitory effect of AA on the migration and invasion of the examined lung cancer cells. CONCLUSIONS: Aspiletrein A may be a potent inhibitor of protein kinase B (Akt). Hence, AA could be further explored as a potential antimetastatic lead compound.


Sujet(s)
Antinéoplasiques d'origine végétale/pharmacologie , Asparagaceae/composition chimique , Carcinome pulmonaire non à petites cellules/anatomopathologie , Tumeurs du poumon/anatomopathologie , Saponines/pharmacologie , Cellules A549 , Carcinome pulmonaire non à petites cellules/traitement médicamenteux , Lignée cellulaire tumorale , Humains , Tumeurs du poumon/traitement médicamenteux , Structure moléculaire , Composés phytochimiques/pharmacologie , Protéines proto-oncogènes c-akt/antagonistes et inhibiteurs , Transduction du signal/effets des médicaments et des substances chimiques
19.
Chem Biodivers ; 18(4): e2001008, 2021 Apr.
Article de Anglais | MEDLINE | ID: mdl-33660915

RÉSUMÉ

A new xanthone derivative, aspidxanthone A (1), and three known compounds ((2S)-1-(ß-D-galactopyranosyloxy)-3-(hexadecanoyloxy)propan-2-yl (9Z,12Z)-octadeca-9,12-dienoate (2), (25S)-spirostane-1ß,3α,5ß-triol (3), and asparenyldiol (4)) were isolated from the whole of the endemic species Aspidistra letreae in Vietnam. Their structures were elucidated by means of extensive spectroscopic analyses and comparison with published data. In this study, we report the isolation and structure elucidation of a new compound aspidxanthone A, antioxidant activities of the extract and isolates 1-4, and in silico molecular docking of aspidxanthone A. The ethyl acetate extract had good antioxidant activity with an IC50 value of 26.3 µg mL-1 . Among the isolates, aspidxanthone A exhibited DPPH reduction activity with an IC50 value of 11.2 µM, which is in the same range as that of the positive control, ascorbic acid. The mechanism of action of aspidxanthone A on the tyrosinase and xanthine oxidase proteins have been clarified by in silico studies.


Sujet(s)
Antioxydants/pharmacologie , Asparagaceae/composition chimique , Xanthones/pharmacologie , Antioxydants/composition chimique , Antioxydants/isolement et purification , Dérivés du biphényle/antagonistes et inhibiteurs , Théorie de la fonctionnelle de la densité , Relation dose-effet des médicaments , Simulation de docking moléculaire , Structure moléculaire , Picrates/antagonistes et inhibiteurs , Xanthones/composition chimique , Xanthones/isolement et purification
20.
RSC Adv ; 11(54): 34281-34290, 2021 Oct 18.
Article de Anglais | MEDLINE | ID: mdl-35497320

RÉSUMÉ

Novel ciprofloxacin composite imprinted materials are synthesized by using co-precipitation polymerization of dual functional monomers (methacrylic acid and 2-vinylpyridine) and polystyrene-co-divinylbenzene. The intermolecular interactions between monomers and template are evaluated by molecular modeling analysis. The physicochemical properties of the obtained polymers are characterized using FT-IR, TGA, and SEM. Batch adsorption experiments are used to investigate adsorption properties (kinetic, pH, and isotherm). These polymers are employed to prepare the solid phase extraction cartridges, and their extraction performances are analyzed by the HPLC-UV method. DFT calculations indicate that hydrogen bonding and π-π stacking are the driving forces for the formation of selective rebinding sites. The obtained polymers exhibit excellent adsorption properties, including fast kinetics and high adsorption capacity (up to 10.28 mg g-1) with an imprinted factor of 2.55. The Scatchard analysis indicates the presence of specific high-affinity adsorption sites on the imprinted polymer. These absorbents are employed to extract CIP in river water with recoveries in the range of 65.97-119.26% and the relative standard deviation of 3.59-14.01%. Furthermore, the used cartridges could be reused at least eight times without decreasing their initial adsorption capacity.

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