Publications by authors named "Le Duc Dat"

is a famous medicinal plant with many ethnopharmacological uses. It is traditionally employed for treating inflammation and cardiovascular diseases. In this study, we established green technology to extract the leaves and twigs of .

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is a vegetable rich in vitamins, minerals, and other nutrients that can be used medicinally to enhance human health. This study described how the antioxidative properties of several organs of were used to optimise extraction conditions through their antioxidative capacity. In addition, an analytical approach applying seven marker chemicals was developed and used to construct the chemical profile while simultaneously ascertaining the primary components and their contents in the leaf extract.

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: is a matrix plant with the high potential to cure several diseases with its medicinal and ethnopharmacological value and nutraceutical properties. In this study, we investigated the chemical and biological properties of this plant cultivated in our local region. : Leaves, roots, seeds, stem bark, and twigs of were extracted and evaluated bioactivities targeting intracellular lipid accumulation and adipocyte differentiation in 3T3-L1 preadipocytes, and UHPLC-ESI-Orbitrap-MS/MS-Based molecular networking guided isolation and dereplication of metabolites from these extracts.

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Acyl-quinic acids (AQAs), present in various plants with many health benefits, are regarded as therapeutic agents in the prevention and treatment of chronic and cardiovascular diseases. The molecular network-guided identification of ten AQA compounds, two new ( and ) and eight known compounds, were isolated from L. f.

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WHO reported that asthma was responsible for 455,000 deaths in 2019 and asthma patients was evaluated 262 million in May 2023. The incidence is expected to increase as the average life expectancy increases, highlighting asthma as a significant health challenge in an aging society. The etiology of asthma is linked to an imbalance of Th1 and Th2 cells, respiratory inflammation, and pulmonary cell proliferation.

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Flavonoids have extensive biological qualities that support human health. A molecular networking strategy produced representative networks despite mass fragmentation of spectra of untargeted data-dependent acquisition approach to target flavonoid glycosides from Vicia bungei by using UHPLC-MS guided isolation. Using contemporary methods, seven chemicals were extracted and identified.

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Ethnopharmacological Relevance: Colorectal cancer (CRC) remains a significant global health concern, and targeting inflammation has emerged as a promising approach for its prevention and treatment. Medicinal plants and phytochemicals have garnered attention for their potential efficacy against inflammation with minimal toxicity. Osmanthus fragrans var.

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Molecular networking drove the selection of material from organs that targeted active flavonoid glycosides. To optimize the extraction process, the flowers of were used to produce an anti-inflammatory extract. The effects of variables-organic solvent ratio; extraction time; and temperature-were investigated by the response of anti-inflammatory activity.

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DA, one of the medium-chain fatty acids found in coconut oil, is suggested to have diverse biochemical functions. However, its possible role as a chemoprevention agent in HCC has not been deciphered. Aberrant activation of c-Met can modulate tumor growth and progression in HCC.

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A chemical investigation of K. heteroclite led to isolation of two new dibenzocyclooctadienes (1 and 2) together with 14 known compounds (3-16) by using multiple chromatographic techniques. New compounds (1 and 2) were obtained and identified by spectroscopic methods (HR-ESI-MS, 1D and 2D NMR, and ECD) as well as by comparison of their experimental data with those reported in the literatures.

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The young leaves and shoots of . are consumed daily as cooked vegetables and can provide various health benefits. The antioxidant and anti-inflammatory capacities of its total extract and fractions were accessed for the first time in this study.

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Three undescribed iridoid glucosides and nine known compounds were isolated from Vitex rotundifolia L. f. Their structural elucidation was performed based on their spectroscopic data or acid hydrolysis followed by HPLC analysis and comparison of their NMR data with those reported in the literature.

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The objective of this study is to describe the separation and identification of one new phenolic and 19 known compounds from . Their structures were determined based on spectroscopic (NMR, CD, and MS) data analysis or Mosher's method, and were compared with those reported in the literature. These isolates were then evaluated for their anti-inflammatory and antioxidant activities based on the inhibition of nitric oxide (NO) and interleukin (IL)-8 production in lipopolysaccharide (LPS)-stimulated cells (RAW264.

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The concern about the quality of medicinal herbs is becoming important due to the poor quality of commercial products like cosmetics, functional foods, and natural medicine produced from them. However, there is a lack of modern analytical methods to evaluate the constituents of until the moment. This paper reports an analytical method based on UHPLC-DAD and UHPLC-MS/MS MRM methods to evaluate the ethanolic extracts of leaves and twigs.

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Ilex rotunda Thunb. has been used in traditional medicine for treating rheumatoid arthritis, relieving pain and indigestion. In the present study, we isolated three new caffeic acid benzyl ester (CABE) analogs (1-3) along with eight known compounds (4-11) from the extract of I.

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Article Synopsis
  • Thunb. has been traditionally used to treat ailments like the common cold and eczema, but its antioxidant properties are not fully understood.
  • The study found that twig extracts had the highest antioxidant capacity, leading to further optimization of extraction methods and the isolation of eight key phytochemicals.
  • Among these, 4,5-dicaffeoylquinic acid was identified as having significant antioxidant activity and the ability to cross the blood-brain barrier, indicating its potential for use in CNS drug development.
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Quorum sensing (QS) is an attractive target for the treatment of multidrug-resistant , against which new antibiotics are urgently needed. Because LasR is at the top of the QS hierarchy controlling Rhl and PQS systems, most QS inhibitors have been targeted to LasR. However, it has recently been reported that in clinical isolates of , LasR is frequently mutated and nonfunctional, and RhlR independently acts to produce virulent factors that maintain toxicity.

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An extraction method using 80% EtOH was selected and applied to obtain the total extracts from leaves, flowers, fruits, twigs, and roots of L.f. based on the antioxidant activity-guided experiments.

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Excessive production of melanin causes various dermatological disorders including hyperpigmentation. To search for anti-melanogenesis candidates from natural products, we discovered that leaves of var. (OFA) suppressed melanin production.

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is hired as multiple remedies for treatment of insomnia, blood and circulatory disorders, asthma, dry cough, jaundice, seminal weakness, cardiac debility, and skin diseases in Vietnam. Our research discovered the phytochemical investigation of constituents from this herbal medicine resulted in the isolation of two new compounds (jatamansides A () and B ()) together with 16 known ones from the whole plant. Their structures were established by using spectroscopic techniques (multinuclear and multidimensional nuclear magnetic resonance, infrared, ultraviolet-visible), mass spectrometry, hydrolysis analysis, or comparing their NMR data to those reported in the literature.

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Species of are used traditionally in their native areas for the treatment of fevers, asthma, coughs, cholera, chest pain, arthritis, rheumatism, and sexually transmitted diseases. To identify natural products having efficacy against inflammatory bowel disease (IBD), we identified a new, 16-hydroxy-4β-carboxy--β-D-glucopyranosyl-19-nor-totarol () together with three known diterpenoids from . Furthermore, all the extracts, fractions, and isolates - were investigated for their anti-inflammatory effects by assessing the expression on nitric oxide (NO) production and proinflammatory cytokines in lipopolysaccharide (LPS)-stimulated RAW 264.

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A series of schiartane C nortriterpenoids with 5/5/7/6/5 membered consecutive rings (‒) with an unique schinortriterpenoid skeleton including a new, kadcoccilactone V (), together with four known ones (‒) and three known triterpenoids (‒) were identified from stems of (Lem.) A. C.

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Article Synopsis
  • - Eclipta prostrata L., Scoparia dulcis, and Cynodon dactylon are boiled together to improve diabetes management, but the specific active ingredients responsible for these effects are still unknown.
  • - This study aimed to explore the anti-diabetic and anti-obesity properties by investigating the inhibition of protein tyrosine phosphatase 1B (PTP1B); certain fatty acids and triterpenoid-glycosides were found to effectively inhibit PTP1B.
  • - The study also revealed anti-inflammatory effects, with several compounds significantly reducing nitric oxide production in stimulated cells, and further analysis focused on identifying the mechanisms of action involving specific protein expressions.
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A phytochemical investigation for the constituents of the stems of Millettia dielsiana Harms ex Diels resulted in the isolation of a new isoflavone glycoside, mildiside A (1), and 14 known compounds (2-15). Their chemical structures were determined using a combination of IR, NMR, MS, and optical rotation analysis, as well as comparison with the literature data. The ethanolic (EtOH) extract and several isolated compounds exert the inflammatory effect of nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated murine RAW264.

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