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Pàgina 1 des de 24 resultats
64Cu-azabicyclo[3.2.2]nonane thiosemicarbazone complexes: radiopharmaceuticals for PET of topoisomerase II expression in tumors.
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Topoisomerase II (Topo-II) is an essential enzyme in the DNA replication process and is the primary cellular target for many of the most widely used and effective anticancer agents. It has been reported that thiosemicarbazones (TSCs) are potent antitumor agents that inhibit Topo-II. The aim of this
Synthesis, cytotoxicity, and antitumor activity of copper(II) and iron(II) complexes of (4)N-azabicyclo[3.2.2]nonane thiosemicarbazones derived from acyl diazines.
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A series of thiosemicarbazones (TSCs) (bearing a (4)N-azabicyclo[3.2.2]nonane moiety) derived from 3-acylpyridazines, 4-acetylpyrimidines, and 2-acetylpyrazines (1-8) were synthesized as potential antitumor agents. TSCs 1-8 exhibited potent cytotoxic activity against human acute lymphoblastic
Antiproliferative activity of dmoPTA-Ru(II) complexes against human solid tumor cells.
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The biological evaluation of new Ru(II) complexes carrying dmoPTA (dmoPTA=3,7-dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane) ligands is reported. The results on the biological activity revealed that the organometallic complexes are active against all cell lines with GI(50) values in the range
Synthesis, characterization, and in vitro cytotoxicity of some gold(I) and trans platinum(II) thionate complexes containing water-soluble PTA and DAPTA ligands. X-ray crystal structures of [Au(SC4H3N2)(PTA)], trans-[Pt(SC4H3N2)2(PTA)2], trans-[Pt(SC5H4N)2(PTA)2], and trans-[Pt(SC5H4N)2(DAPTA)2].
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A series of gold(I) and platinum(II) complexes of the type [Au(SR)(P)] and trans-[Pt(SR) 2(P) 2] [SR = 2-thiopyridine (SPy), 2-thiopyrimidine (SPyrim); P = 1,3,5-triaza-7-phosphaadamantane (PTA), 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (DAPTA)] were prepared and characterized, and
Polyisoprenylated benzophenones from Clusiaceae: potential drugs and lead compounds.
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Many new polyisoprenylated benzophenones with a bicyclo[3.3.1]-nonane-2,4,9-trione core structure have been isolated from plants in the Clusiaceae family, and their potent biological properties have been the subject of several studies. This review summarizes the biological activities reported for
Cytotoxic xanthone derivatives from the twigs of Garcinia oligantha.
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Ten undescribed xanthone derivatives, garoliganthins A-I and oliganthaxanthone C, along with eight known compounds, were isolated from the twigs of Garcinia oligantha Merr. Their structures and absolute configurations were determined by extensive spectroscopic methods, single-crystal X-ray
Tricyclic Polyprenylated Acylphloroglucinols from St John's Wort, Hypericum perforatum.
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The new polyprenylated acylphloroglucinol derivatives 1-15 and the known furohyperforin (16) were isolated from the stems and leaves of Hypericum perforatum. Their structures were determined by analyses of NMR and HRESIMS data. Their absolute configurations were elucidated by a combination of
Transcellular signalling pathways and TNF-alpha release involved in formation of reactive oxygen species in rat alveolar macrophages exposed to tert-butylcyclohexane.
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In the present work, the effects of aliphatic ( n-nonane and n-decane), alicyclic (1,2,4-trimethylcyclohexane and tert-butylcyclohexane, t-BCH) and aromatic (trimethylbenzene and tert-butylbenzene) hydrocarbon solvents on formation of reactive oxygen species (ROS) and the proinflammatory cytokine
Polyprenylated Benzoylphloroglucinols with DNA Polymerase Inhibitory Activity from the Fruits of Garcinia schomburgkiana.
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Chemical investigation of the fruits of Garcinia schomburgkiana collected in Vietnam led to the isolation of eight new schomburgkianones, A-H (1-8), four known (9-12) polyprenylated benzoylphloroglucinols, and four known biflavonoids. The structures of these compounds were elucidated by
Bicyclic polyprenylated acylphloroglucinols and their derivatives: structural modification, structure-activity relationship, biological activity and mechanism of action
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Bicyclic polyprenylated acylphloroglucinols (BPAPs), the principal bioactive benzophenone products isolated from plants of genera Garcinia and Hypericum, have attracted noticeable attention from the synthetic and biological communities due to their fascinating chemical structures and promising
Synthesis and antitumor activity of bicyclo[3.3.1]nonenol derivatives.
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Various novel bicyclo[3.3.1.]nonenol derivatives were synthesized in an efficient one-pot procedure in a remarkably stereoselective reaction. The title compounds show significant antitumor activity against human cancer cell lines. A variety of cinnamic acid derivatives were linked to the title
Homoleptic phosphino copper(I) complexes with in vitro and in vivo dual cytotoxic and anti-angiogenic activity.
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Homoleptic, tetrahedral Cu(i) complexes of the type [Cu(P)4]BF4 (1-3), where P are the phosphine ligands, 1,3,5-triaza-7-phosphaadamantane (PTA), 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (DAPTA) and 2-thia-1,3,5-triaza-phosphoaadamantane-2,2-dioxide (PTA-SO2), have been prepared.
Identification of fredericamycin E from Streptomyces griseus: Insights into fredericamycin A biosynthesis highlighting carbaspirocycle formation.
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Fredericamycin (FDM) A ( 1), a pentadecaketide featuring two sets of peri-hydroxy tricyclic aromatic moieties connected through a unique asymmetric carbaspiro center, exhibits potent cytotoxicity and represents a novel anticancer drug lead. We have localized previously the fdm gene cluster to a 33
Extraction of Teucrium manghuaense and evaluation of the bioactivity of its extract.
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The ethanol extract of Teucrium manghuaense grown in Hainan province (China) was analysed by GC and GC/MS. Of the constituents 84-96% were identified on the basis of their GC retention times and their mass spectra in regard to authentic compounds. The results revealed that it contained
Anticancer therapeutics that target selenoenzymes: synthesis, characterization, in vitro cytotoxicity, and thioredoxin reductase inhibition of a series of gold(I) complexes containing hydrophilic phosphine ligands.
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Gold(I) complexes bearing water-soluble phosphine ligands, including 1,3,5-triaza-7-phosphaadamantane (PTA), 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (DAPTA), and sodium triphenylphosphine trisulfonate (TPPTS), in combination with thionate ligands, were screened for their
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