RESUMEN
Pinostrobin demonstrated anticancer properties, but its hydrophobic feature led to a reduction in bioavailability. The mitochondria-targeted approach successfully synthesized eight new alkyl triphenylphosphonium pinostrobin derivatives (1-8) with good yield in this study. Seven compounds (1-3, 5-8) showed greater cytotoxic potency against the human MCF-7 breast cancer cell line than pinostrobin. Molecular docking studies were performed with two important targets in hormone-dependent anticancer strategies, estrogen receptor α (ERα) ligand binding domains, 3ERT (antagonist recognition and antiproliferative function), and 1GWR (agonist recognition and pro-proliferative function). In addition, the MD simulation study of the two most potent compounds (2 and 3) complexed with both ERα forms suggested that compounds 2 and 3 could serve as favourable antagonists. Furthermore, the in silico ADMET prediction indicated that compounds 2 and 3 could be potential drug candidates.
Asunto(s)
Antineoplásicos , Neoplasias de la Mama , Proliferación Celular , Ensayos de Selección de Medicamentos Antitumorales , Simulación del Acoplamiento Molecular , Compuestos Organofosforados , Humanos , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/síntesis química , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/patología , Neoplasias de la Mama/metabolismo , Proliferación Celular/efectos de los fármacos , Compuestos Organofosforados/química , Compuestos Organofosforados/farmacología , Compuestos Organofosforados/síntesis química , Relación Estructura-Actividad , Células MCF-7 , Receptor alfa de Estrógeno/metabolismo , Receptor alfa de Estrógeno/antagonistas & inhibidores , Femenino , Descubrimiento de Drogas , Estructura Molecular , Relación Dosis-Respuesta a Droga , FlavanonasRESUMEN
Plants of the Zingiberaceae family, specifically those belonging to the Curcuma species, are commonly under consideration as potential therapeutic agents for the management of gastrointestinal diseases. In this study, we carried out a phytochemical study on Curcuma aromatica Salisb. (or so-called "Nghe trang" in Vietnamese) grown in Vietnam, which yields three newly discovered 3,5-diacetoxy diarylheptanoids (1-3) and six known 3,5-dihydroxyl diarylheptanoids (4-9). The bioactivity assessment shows that all isolated compounds, except compounds 3, 7, and 8, could inhibit urease. Compounds 4 and 9 significantly inhibit urease, with an IC50 value of 9.6 and 21.4 µM, respectively, more substantial than the positive control, hydroxyurea (IC50 = 77.4 µM). The structure-activity relationship (SAR) of linear diarylheptanoids was also established, suggesting that the hydroxyl groups at any position of skeleton diarylheptanoids are essential for exerting anti-urease action. Through a comparative analysis of the binding sites of hydroxyurea and diarylheptanoid compounds via our constructed in silico model, the mechanism of action of diarylheptanoid compounds is predicted to bind to the dynamic region close to the dinickel active center, resulting in a loss of catalytic activity. Such insights certainly help design and/or find diarylheptanoid-based compounds for treating gastric ulcers through inhibiting urease.
RESUMEN
This study presents a phytochemical analysis of the leaves of Paramignya trimera, revealing the isolation of a new apotirucallane-type protolimonoid, identified as 25-O-methyl-1,2-dihydroprotoxylocarpin D (1), along with two known compounds (2 and 3). The known compounds were identified as (20S,21R,23R)-21,23-epoxy-7α,24,25-trihydroxy-21-O-methyl-3-oxoapotirucalla-14-ene (2) and 7α,24,25-trihydroxy-3-oxoapotirucalla-14-en-21,23-olide (3). The three apotirucallane-type protolimonoids (1-3) did not exhibit cytotoxicity against MCF-7 cells at a concentration of 100 µM. Interestingly, when MCF-7 cells were treated with compound 1 at various concentrations, a notable stimulatory response was observed, leading to a significant increase in cell viability, up to 127%.
RESUMEN
From the EtOAc-soluble extract of the rhizomes of Zingiber montanum (J.Koenig) Link ex A.Dietr., a novel diphenylbutenoid, montadinin A (1) and a previously unreported phenylbutenoid compound, 1-(3,4-dimethoxyphenyl)but-3-en-2-ol (7), in natural source were isolated. Additionally, seven known phenylbutenoids were also identified. The structures of all compounds were elucidated through NMR spectroscopic interpretation. Compounds cis-3-(3,4-dimethoxyphenyl)-4-[(E)-3,4-dimethoxystyryl]cyclohex-1-ene (2), cis-4-[(E)-3,4-dimethoxystyryl]-3-(2,4,5-trimethoxyphenyl)cyclohex-1-ene (3), trans-3-(3,4,-dimethoxyphenyl)-4-[(E)-2,4,5-trimethoxystyryl]cyclohex-1-ene (5), and cis-3-(3,4-dimethoxyphenyl)-4-[(Z)-2,4,5-trimethoxylstyryl]cyclohex-1-ene (6) showed weak cytotoxicity against HepG2 cells with IC50 values of 122.9, 127.3, 257.5, and 168.5 µM, respectively.
RESUMEN
From the EtOAc extract of the wood of the stems of Taxotrophis ilicifolius (Moraceae), two new secondary metabolites, named taxotrophises A (1) and B (2), were isolated, together with five known compounds (3-7). Their chemical structures have been elucidated by extensive NMR spectroscopic analysis. All isolated compounds have been evaluated for α-glucosidase inhibitory activity. In the present work, compounds 1 and 4 showed the strongest α-glucosidase inhibitory activity with IC50 values of 6.5 and 1.5 µM, respectively, and stronger than that of a positive control, acarbose (IC50; 214.5 µM).
RESUMEN
An extract from the rhizomes of Cassumunar ginger (Zingiber purpureum Roscoe). was found to have significant α-glucosidase inhibitory activity with an IC50 value of 6.3 µg/mL. Two new phenylbutenoids, cassudimin A (1) and cassumunol N (2), and seven known compounds (3-9) were isolated. Their structures and relative configurations of two new compounds were elucidated based on spectra interpretation. Compounds 1-3, 6-9 showed more potent α-glucosidase inhibitory activity than a positive control, acarbose (IC50 = 168.0 µM). Dehydrozingerone (6) exhibited the most potent α-glucosidase inhibition with an IC50 value of 8.3 µM. Compounds 7 and 9 were found in Z. purpureum rhizomes for the first time.
RESUMEN
From a CH2 Cl2 -soluble fraction of the stem barks of Taxus wallichiana, one new abeo-icetexane-type diterpenoid, taxamairinâ I (1), was isolated. Its absolute configuration was elucidated based on spectroscopic interpretation and time-dependent density functional theory (TD-DFT) calculation of optical rotation. In addition, the plausible biosynthesis pathway for the formation of the new abeo-icetexane-type diterpenoid was proposed. Taxamairinâ I (1), at a concentration of 100â µM, did not show cytotoxicity against Hep3B human liver cancer cell lines.
Asunto(s)
Diterpenos , Taxus , Humanos , Línea Celular , Diterpenos/farmacología , Diterpenos/metabolismo , Taxus/químicaRESUMEN
From an EtOAc-soluble fraction of the roots of Paramignya trimera, one undescribed chromene derivative, paratrimerin Z (1), was isolated. Its structure was elucidated on the basis of NMR spectroscopic interpretation. The absolute configuration of 1 was determined by the specific rotation analysis of its acid-catalyzed hydrolysis product. Paratrimerin Z (1), at a concentration of 100 µM, did not show cytotoxicity against Hep3B human liver cancer cell line.
RESUMEN
From an ethyl acetate-soluble fraction of the leaves of Muntingia calabura, one new trimeric δ-tocopherol derivative named as tocomuntin A (1), together with three known δ-tocopherol derivatives (2-4) were isolated. Their structures were elucidated based on the interpretation of NMR and MS spectroscopic data. In this work, δ-tocopherol (3) was found to have α-glucosidase inhibitory activity for the first time (IC50, 47.3 µM).
Asunto(s)
Magnoliopsida , Extractos Vegetales , Hojas de la Planta , Tocoferoles , Extractos Vegetales/química , Hojas de la Planta/química , Magnoliopsida/química , Tocoferoles/química , Inhibidores de Glicósido Hidrolasas/químicaRESUMEN
A phytochemical investigation of the rhizomes of Curcuma zedoaria was carried out, leading to the isolation of a new diphenylheptanoid, zedoaroxane A (1), together with four known compounds (2-5). Their structures were elucidated based on NMR spectroscopic data. All isolated compounds possessed α-glucosidase inhibitory activity, with the IC50 values ranging from 35.2 to 89.0 µM, more potent than that of the positive control acarbose (IC50, 214.5 µM).
Asunto(s)
Curcuma , Sesquiterpenos , Curcuma/química , Extractos Vegetales/química , Rizoma/química , Sesquiterpenos/químicaRESUMEN
Following bioactivity-guided isolation, four new stilbene-like derivatives, named Strebluses E-H, were isolated from the EtOAc-soluble fraction of the stems of Streblus ilicifolius (Moraceae). Their chemical structures were elucidated based on NMR spectroscopic data interpretation and optical rotation calculation. Streblus E possesses potent tyrosinase inhibitory activity with an IC50 value of 0.1 µM. Oxy-tyrosinase has two bound Cu2+ ions and a peroxide group in the binding site, which has a role in the catalytic oxidation. Thus, a docking study of Streblus E with oxy-tyrosinase was performed to analyze the ligand-protein interactions. With in silico modelling, the S value and the ligand-protein interactions suggested that Streblus E showed lower binding affinity for oxy-tyrosinase than that of Streblus C.
RESUMEN
The phytochemical investigation of the EtOAc-soluble fraction of the aerial parts of Solanum procumbens Lour. has been carried out to obtain seven compounds, including a new 8,3'-neolignan named solacanin A (1). Their chemical structures were elucidated based on the spectroscopic data interpretation. All isolated compounds were tested for their α-glucosidase inhibitory activity. Compounds 1 and 3-6 showed inhibitory activity with IC50 values of 221.5, 18.9, 6.0, 104.1, and 219.7 µM, respectively.[Formula: see text].
Asunto(s)
Lignanos , Solanum , Lignanos/química , Fitoquímicos , Extractos Vegetales/química , alfa-GlucosidasasRESUMEN
From the EtOAc-soluble extract of the stems of Streblus ilicifolius (Moraceae), two new secondary metabolites named strebluses A (1) and B (2) were isolated. Their chemical structures have been concluded based on the chemical derivatisation and the spectroscopic interpretation. All compounds have been tested for their tyrosinase inhibitory activity. They showed weaker inhibitory activity than that of kojic acid (IC50, 44.6 µM).[Formula: see text].
Asunto(s)
Moraceae , Zea mays , Monofenol Monooxigenasa , Moraceae/química , Neopreno , Extractos Vegetales/farmacologíaRESUMEN
From the methanolic extract of the rhizomes of Boesenbergia pandurata, a new flavanone derivative named (2R,7â³S)-8-(1-phenyl-2-carboxyethyl)pinocembrin (1) and four known flavonoids (2-5) were isolated. Its absolute configuration was concluded by NMR and MS spectroscopic analysis, together with comparison between experimental and calculated ECD data. In turn, compound 1 exhibited strong cytotoxicity against the PANC-1 human pancreatic cancer cell line with a PC50 value of 6.4 µM under nutrient-deprived conditions, comparable with that of arctigenin (PC50, 0.83 µM).
Asunto(s)
Antineoplásicos Fitogénicos , Flavanonas , Zingiberaceae , Antineoplásicos Fitogénicos/química , Línea Celular Tumoral , Flavanonas/análisis , Flavanonas/farmacología , Humanos , Rizoma/química , Zingiberaceae/químicaRESUMEN
From the EtOAc-soluble extract of the stems of Buchanania lucida, one new lignan, (+)-(8S,8'S)-5'-methoxy-4,4'-di-O-methylsecoisolariciresinol (1), together with five known compounds (2-6) were isolated. Their structures were elucidated on the basis of NMR spectroscopic interpretation. The absolute configuration of 1 was determined based on the Cotton effects in the ECD spectrum. In the tyrosinase inhibitory activity test, p-hydroxybenzoic acid (6) showed the strong effect, with an IC50 value of 9.35 µM.
Asunto(s)
Anacardiaceae , Lignanos , Lignanos/química , Lignanos/farmacología , Estructura Molecular , Monofenol Monooxigenasa , Extractos Vegetales/química , Tallos de la PlantaRESUMEN
A birth cohort study was conducted in Khan Hoa Province, central Vietnam between 2009 and 2012 to determine the seroprevalence of hepatitis B virus (HBV) in pregnant women and their children, and associated risk factors. We enrolled 1987 pregnant women with their babies at the birth phase, and 12.6% (95% confidence interval [CI]: 11.1-14.0) of mothers were hepatitis B surface antigen (HBsAg)+. At 2-year follow-up phase, 1339 (67.4%) children were enrolled of whom 76.6% completed hepatitis B vaccines (HepB) and 1.9% (95% CI: 1.2-2.7) were HBsAg+. When mothers were hepatitis B e antigen (HBeAg)+, 28.3% of children have got infected even with complete HepB. HBV infection in mothers, hepatitis B surface antibody (anti-HBs antibody) below the seroprotective level in children, and mothers with pre-pregnancy low body mass index were associated with HBV infection in children. Meanwhile, HBV infection in children, older maternal age, no or incomplete doses of HepB, and boys were associated with anti-HBs antibody below the seroprotective level in children. Our birth cohort study determined a low rate of congenital HBV infection and associated risk factors in Vietnam, however further studies are needed to advance prevention including anti-viral therapy in pregnant women at high risk.
Asunto(s)
Vacunas contra Hepatitis B/uso terapéutico , Hepatitis B/prevención & control , Vacunación Masiva , Complicaciones Infecciosas del Embarazo/prevención & control , Adolescente , Adulto , Preescolar , Femenino , Hepatitis B/complicaciones , Hepatitis B/epidemiología , Antígenos de Superficie de la Hepatitis B/sangre , Humanos , Lactante , Recién Nacido , Masculino , Embarazo , Complicaciones Infecciosas del Embarazo/epidemiología , Estudios Prospectivos , Factores de Riesgo , Vietnam/epidemiología , Adulto JovenRESUMEN
From the methanol extract of the wood of Mangifera gedebe (Anacardiaceae), we had isolated a new secondary metabolite named gedebic acid (1) and six known compounds (2-7). Their chemical structures were determined by spectroscopic methods as well as comparing with data in the literature. All compounds were tested for α-glucosidase inhibitory activity. Compounds 4-7 showed more potent inhibitory activity, with IC50 values ranging from 45.3 to 142.6 µM, than that of a positive control acarbose (IC50, 214.5 µM).
Asunto(s)
Inhibidores de Glicósido Hidrolasas/química , Hidroxibenzoatos/química , Mangifera , alfa-Glucosidasas/química , Inhibidores de Glicósido Hidrolasas/aislamiento & purificación , Hidroxibenzoatos/aislamiento & purificación , Estructura Molecular , Extractos Vegetales , MaderaRESUMEN
Bioactivity-guided fractionation of the CHCl3-soluble extract of the roots of Paramignya trimera was carried out to obtain a new acridone alkaloid, paratrimerin I. Its structure was elucidated based on NMR spectroscopic data interpretation. Paratrimerin I showed noteworthy cytotoxicity against the HepG2 human hepatocellular and MCF-7 human breast carcinoma cell lines, with the submicromolar IC50 values of 0.43 and 0.26 µM, respectively. The N-methyl, C-4 methoxy, and C-5 hydroxy groups in the acridone skeleton can be proposed as a structural feature for good cytotoxicity.
Asunto(s)
Alcaloides , Rutaceae , Acridonas , Alcaloides/farmacología , Línea Celular Tumoral , Humanos , Estructura Molecular , Raíces de PlantasRESUMEN
From an EtOAc-soluble fraction of the stem barks of Swintonia floribunda (Anacardiaceae), decumbic anhydride (1) and four known compounds 2-5 were isolated. Their chemical structures were elucidated based on the spectroscopic data interpretation. The GIAO-DFT calculation of 13C NMR chemical shifts was carried out to clarify the structure of 1. The absolute configuration of 1 was assigned based on the Cotton effects in its ECD spectrum. Compound 1 showed potent tyrosinase inhibitory activity with an IC50 value of 52.2 µM.
Asunto(s)
Anacardiaceae/química , Fitoquímicos/química , Anhídridos/química , Inhibidores Enzimáticos/química , Inhibidores Enzimáticos/farmacología , Lactonas/química , Monofenol Monooxigenasa/antagonistas & inhibidores , Fitoquímicos/farmacología , Corteza de la Planta/químicaRESUMEN
Phytochemical study on the EtOAC-soluble extract of the leaves of Gnetum gnemon furnished the isolation of a new phenylheptanoid, gnetumal (1), along with five known compounds (2-6). Their isolation was carried out by using the column chromatography and their structures were elucidated based on the basis of the spectral interpretation. Bioactivity assay of these compounds indicated that gnetumal (1) and p-coumaric acid (5) possessed more potent tyrosinase inhibitory activity, with IC50 values of 31.6 and 2.3 µM, respectively, than that of a positive control kojic acid (IC50; 44.6 µM).