Results 21 to 30 of about 79,811 (267)

AFM studies of DNA structures extracted from adriamycin treated and non-treated Ehrlich tumor cells [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
Atomic force microscopy (AFM), a unique tool to investigate drug treatment of cancer cells, was used to analyze the anti-neoplastic activity of adriamycin by comparing DNA structures of non-treated and adriamycin-treated Ehrlich tumor cells.
M. AVRAMOV IVIC   +8 more
doaj  

Cracking the Cytotoxicity Code: Apoptotic Induction of 10-Acetylirciformonin B is Mediated through ROS Generation and Mitochondrial Dysfunction

open access: yesMarine Drugs, 2014
A marine furanoterpenoid derivative, 10-acetylirciformonin B (10AB), was found to inhibit the proliferation of leukemia, hepatoma, and colon cancer cell lines, with selective and significant potency against leukemia cells.
Huei-Chuan Shih   +9 more
doaj   +1 more source

Variation of Structure and Cellular Functions of Type IA Topoisomerases across the Tree of Life

open access: yesCells
Topoisomerases regulate the topological state of cellular genomes to prevent impediments to vital cellular processes, including replication and transcription from suboptimal supercoiling of double-stranded DNA, and to untangle topological barriers ...
Kemin Tan, Yuk-Ching Tse-Dinh
doaj   +1 more source

Type IA Topoisomerases as Targets for Infectious Disease Treatments

open access: yesMicroorganisms, 2021
Infectious diseases are one of the main causes of death all over the world, with antimicrobial resistance presenting a great challenge. New antibiotics need to be developed to provide therapeutic treatment options, requiring novel drug targets to be ...
Ahmed Seddek   +2 more
doaj   +1 more source

The lignan niranthin poisons Leishmania donovani topoisomerase IB and favours a Th1 immune response in mice

open access: yesEMBO Molecular Medicine, 2012
Niranthin, a lignan isolated from the aerial parts of the plant Phyllanthus amarus, exhibits a wide spectrum of pharmacological activities. In the present study, we have shown for the first time that niranthin is a potent anti‐leishmanial agent.
Sayan Chowdhury   +8 more
doaj   +1 more source

The Antileukemic Effect of Xestoquinone, A Marine-Derived Polycyclic Quinone-Type Metabolite, Is Mediated through ROS-Induced Inhibition of HSP-90

open access: yesMolecules, 2021
Xestoquinone is a polycyclic quinone-type metabolite with a reported antitumor effect. We tested the cytotoxic activity of xestoquinone on a series of hematological cancer cell lines.
Kuan-Chih Wang   +9 more
doaj   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

open access: yesFEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Neolignans from Licaria chrysophylla and Licaria aurea with DNA topoisomerase II-α inhibitory activity

open access: yesQuímica Nova, 2012
Seven natural neolignans isolated from Licaria chrysophylla and Licaria aurea along with five semisynthetic derivatives were tested for their inhibitory action on DNA-topoisomerase by relaxation assays on pBR322 plasmid DNA.
Amanda de Melo Bezerra   +8 more
doaj   +1 more source

A synthetic benzoxazine dimer derivative targets c‐Myc to inhibit colorectal cancer progression

open access: yesMolecular Oncology, EarlyView.
Benzoxazine dimer derivatives bind to the bHLH‐LZ region of c‐Myc, disrupting c‐Myc/MAX complexes, which are evaluated from SAR analysis. This increases ubiquitination and reduces cellular c‐Myc. Impairing DNA repair mechanisms is shown through proteomic analysis.
Nicharat Sriratanasak   +8 more
wiley   +1 more source

Topoisomerase-Mediated DNA Damage in Neurological Disorders

open access: yesFrontiers in Aging Neuroscience, 2021
The nervous system is vulnerable to genomic instability and mutations in DNA damage response factors lead to numerous developmental and progressive neurological disorders.
Morgan Crewe, Ram Madabhushi
doaj   +1 more source

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