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Superexpression of tuberculosis antigens in plant leaves.

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Recent developments in genetic engineering allow the employment of plants as factories for 1/foreign protein production. Thus, tuberculosis (TB) ESAT6 antigen was expressed in different plant systems, but the level of vaccine protein accumulation was extremely low. We describe the technology for

Novel screening tools for latent tuberculosis: time to leave an old friend?

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OBJECTIVE Therapeutic inhibition of tumour necrosis factor-alpha strongly increases the risk of reactivation in latent tuberculosis infection. Recent blood tests based on antigen-specific T cell response and measuring production of interferon-gamma, so called interferon-gamma release assays (IGRAs),

[Effect of extract of dry Betula leaves on growth of Mycobacterium tuberculosis].

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N-Cinnamoyltetraketide Derivatives from the Leaves of Toussaintia orientalis.

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Seven N-cinnamoyltetraketides (1-7), including the new Z-toussaintine E (2), toussaintine F (6), and toussaintine G (7), were isolated from the methanol extract of the leaves of Toussaintia orientalis using column chromatography and HPLC. The configurations of E-toussaintine E (1) and toussaintines

Sesquiterpene lactones from the leaves of Hedyosmum brasiliense (Chloranthaceae).

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Hedyosmum brasiliense Miq. is an endemic aromatic arborescent shrub that is the only representative of the Chloranthaceae in Brazil. There have been few studies seeking to determine its chemical constituents and/or pharmacological effects. This work describes the isolation and identification of

New amide and dioxopiperazine derivatives from leaves of Breynia nivosa.

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The first chemical investigation of leaves of Breynia nivosa from Nigeria resulted in the isolation of two new amide derivatives breynivosamides A and B (1 and 2) and two new dioxopiperazine derivatives breynivosines A and B (4 and 5) together with seven known compounds (3, 6-11). The structures of

New flavanones from the leaves of Cryptocarya chinensis and their antituberculosis activity.

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Four new flavanones, cryptoflavanones A-D (1-4, resp.), together with eight known compounds, were isolated from the leaves of Cryptocarya chinensis. The structures of these new compounds were determined by spectral analyses. Among the isolated compounds, pinocembrin (5) and cryptocaryone (6)

Novel epoxyfuranoid lignans and antitubercular constituents from the leaves of Beilschmiedia tsangii.

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Three new epoxyfuranoid lignans, 4alpha,5alpha-epoxybeilschmin A (1), 4alpha,5alpha-epoxybeilschmin B (2), and beilschmin D (3), together with nine known compounds have been isolated from the leaves of Beilschmiedia tsangii. The structures of these new compounds were determined through spectral

Macrophyllin-type bicyclo[3.2.1]octanoid neolignans from the leaves of Pleurothyrium cinereum.

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Four new macrophyllin-type bicyclo[3.2.1]octanoid neolignans, (7S,8R,3'S,5'R)-Delta(8')-5,5',3'-trimethoxy-3,4-methylenedioxy-2',3',4',5'-tetrahydro-2',4'-dioxo-7.3',8.5'-neolignan (cinerin A), 1,

Global chemical composition and antioxidant and anti-tuberculosis activities of various extracts of Globularia alypum L. (Globulariaceae) leaves.

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In this work, an evaluation of the biological activities of Globularia alypum L. extracts and their global chemical composition was realized. Extracts from G. alypum were obtained by two extraction methods. The composition of polyphenols (8.5-139.95 g gallic acid equivalent/Kg of dry mass), tannins

Anti-Mycobacterium tuberculosis activity of essential oil and 6,7-dehydroroyleanone isolated from leaves of Tetradenia riparia (Hochst.) Codd (Lamiaceae).

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BACKGROUND The global resurgence of tuberculosis (TB) and the development of drug resistance, as multidrug-resistant (MDR) and extensively drug-resistant (XDR) Mycobacterium tuberculosis isolates, are a threat to TB control and have created a need for new and more effective anti-TB

Antimycobacterial, docking and molecular dynamic studies of pentacyclic triterpenes from Buddleja saligna leaves.

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Buddleja saligna (family Buddlejaceae) is a medicinal plant endemic to South Africa. Two isomeric pentacyclic triterpenes, oleanolic acid and ursolic acid, were isolated from the leaves of B. saligna using silica gel column chromatography. Compounds oleanolic acid and ursolic acid were subjected to

Detection and confirmation of alkaloids in leaves of Justicia adhatoda and bioinformatics approach to elicit its anti-tuberculosis activity.

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The extraction and determination of alkaloids was performed and confirmed by phytochemical analysis. Six different quinazoline alkaloids (vasicoline, vasicolinone, vasicinone, vasicine, adhatodine and anisotine) were found in the leaf of Justicia adhatoda (J. adhatoda). The presence of the peaks

In vitro activity of collinin isolated from the leaves of Zanthoxylum schinifolium against multidrug- and extensively drug-resistant Mycobacterium tuberculosis.

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BACKGROUND Tuberculosis is a very serious infectious disease that threatens humanity, and the emergence of multidrug-resistant (MDR), extensively drug-resistant (XDR) strains resistant to drugs suggests that new drug development is urgent. In order to develop new tuberculosis drug, we have conducted

A new long-chain alkene and antituberculosis constituents from the leaves of Pourthiaea lucida.

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A new long-chain alkene, dotriacont-1-ene (1), was isolated from the leaves of Pourthiaea lucida, together with twelve known compounds. The structure of this new compound was determined by NMR and mass-spectrometric analyses. Among the isolated compounds, alpha-tocospiro A (2), alpha-tocopheryl

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