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Sida 1 från 463 resultat
Inhibition of methylazoxymethanol-induced intestinal tumors in the rat by pyrazole with paradoxical effects on skin and kidney.
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Methylazoxymethanol is a potent carcinogen and induces tumors predominantly of the small intestine and colon following a single injection. Previous data indicated that alcohol dehydrogenase could convert this carcinogen to a reactive alkylating agent. Rats were treated with an inhibitor of this
A Novel Synthetic Compound (E)-5-((4-oxo-4H-chromen-3-yl)methyleneamino)-1-phenyl-1H-pyrazole-4-carbonitrile Inhibits TNFα-Induced MMP9 Expression via EGR-1 Downregulation in MDA-MB-231 Human Breast Cancer Cells
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Breast cancer is a common malignancy among women worldwide. Gelatinases such as matrix metallopeptidase 2 (MMP2) and MMP9 play crucial roles in cancer cell migration, invasion, and metastasis. To develop a novel platform compound, we synthesized a flavonoid derivative,
Analysis of the in vitro inhibition of murine and human tumor cell growth by pyrazole derivatives and a substituted azabicyclo [3.1.0] hexane-2,4-dione.
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3-Ethoxycarbonyl-5-phenyl-1, 3a, 4, 5, 6, 6a-hexahydropyrrolo[3,4-c]pyrazole-4, 6-dione, 2, 2, 6, 6-tetraethyl-1H, 5H-pyrazole[1, 2-a]pyrazole-1, 3, 5, 7-[2H, 6H]-tetraone and 6-ethoxycarbonyl-3-phenyl-3-azabicyclo[3.1.0] hexane-2, 4-dione demonstrated potent cytotoxic activity in the human Tmolt3,
Synthesis and evaluation of indole, pyrazole, chromone and pyrimidine based conjugates for tumor growth inhibitory activities--development of highly efficacious cytotoxic agents.
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Based upon the lead compounds 10 and 11, a number of conjugates were synthesized by the combination of chromone-pyrimidine, chromone-indolinone, chromone-pyrazole, indole-pyrimidine, indole-indolinone and indole-pyrazole moieties. Evaluation of these compounds for tumor growth inhibitory activities
Quinone-Fused Pyrazoles through 1,3-Dipolar Cycloadditions: Synthesis of Tricyclic Scaffolds and in vitro Cytotoxic Activity Evaluation on Glioblastoma Cancer Cells.
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A novel and straightforward synthesis of highly substituted isoquinoline-5,8-dione fused tricyclic pyrazoles is reported. The key step of the synthetic sequence is a regioselective, Ag2 CO3 promoted, 1,3-dipolar cycloaddition of C-heteroaryl-N-aryl nitrilimines and substituted
Hepatotoxicity mediated by pyrazole (cytochrome P450 2E1) plus tumor necrosis factor alpha treatment occurs in c-Jun N-terminal kinase 2-/- but not in c-Jun N-terminal kinase 1-/- mice.
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Cytochrome P450 2E1 (CYP2E1) induction and tumor necrosis factor alpha (TNF-α) production are key risk factors in alcoholic liver injury. Increased oxidative stress from CYP2E1 induction by pyrazole in vivo sensitizes the liver to TNF-α-induced hepatotoxicity by a mechanism involving the activation
Novel ferrocenyl pyrazoles inhibit breast cancer cell viability via induction of apoptosis and inhibition of PI3K/Akt and ERK1/2 signaling.
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Despite the advances in early detection and targeted therapies, chemotherapy is still of vital importance in breast cancer treatment. However, development of drug resistance and serious side effects limits their usage. Thus, there is an urgent need for safer and more effective agents against breast
Synthesis and apoptotic activity of new pyrazole derivatives in cancer cell lines.
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We designed and synthesized new pyrazole thiourea chimeric derivatives and confirmed their structures by NMR and IR spectra. Apoptotic effects were studied in human cancer cells. The N-[(1-methyl-1H-pyrazol-4-yl)carbonyl]-N'-(3-bromophenyl)-thiourea compound (4b) exhibited the highest
Synthesis and molecular docking study of new pyrazole derivatives as potent anti-breast cancer agents targeting VEGFR-2 kinase
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Based on the previous studies that revealed the valuable role of pyrazole scaffold in cancer management and VEGFR-2 inhibition, a new set of pyrazole conjugated with pyrazoline, triazolopyrimidine and pyrazolone moieties were synthesized and investigated for their anticancer efficiency against human
Straightforward synthesis of a novel ring-fused pyrazole-lactam and in vitro cytotoxic activity on cancer cell lines.
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In this paper a straightforward synthesis of a novel pyrazole derivative is reported. Prominent feature of this synthetic process is a 1,3-Dipolar Cycloaddition of a suitable nitrile imine with an activated α,β-unsaturated lactam to afford directly and regioselectively the corresponding ring-fused
Aryl-4,5-dihydro-1H-pyrazole-1-carboxamide Derivatives Bearing a Sulfonamide Moiety Show Single-digit Nanomolar-to-Subnanomolar Inhibition Constants against the Tumor-associated Human Carbonic Anhydrases IX and XII.
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A series of new 3-phenyl-5-aryl-N-(4-sulfamoylphenyl)-4,5-dihydro-1H-pyrazole-1-carboxamide derivatives was designed here, synthesized, and studied for carbonic anhydrase (CAs, EC 4.2.1.1) inhibitory activity against the human (h) isozymes I, II, and VII (cytosolic, off-target
Synthesis, biological evaluation and in silico modelling studies of 1,3,5-trisubstituted pyrazoles carrying benzenesulfonamide as potential anticancer agents and selective cancer-associated hCA IX isoenzyme inhibitors.
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Inhibition of carbonic anhydrases (CAs, EC 4.2.1.1) has clinical importance for the treatment of several diseases. They participate in crucial regulatory mechanisms for balancing intracellular and extracellular pH of the cells. Among CA isoforms, selective inhibition of hCA IX has been linked to
Synthesis of Novel Pyrazole Derivatives and Their Tumor Cell Growth Inhibitory Activity.
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To find novel antitumor agents, a series of 1H-benzofuro[3,2-c]pyrazole derivatives 4a-e were designed and synthesized. The treatment of 6-methoxybenzofuran-3(2H)-one 3 with LiHMDS in anhydrous tetrahydrofuran (THF) followed by reaction with 3-substitued phenyl
Design and synthesis of pyrazole-pyrazoline hybrids as cancer-associated selective COX-2 inhibitors
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In continuation of our previous work on cancer and inflammation, 15 novel pyrazole-pyrazoline hybrids (WSPP1-15) were synthesized and fully characterized. The formation of the pyrazoline ring was confirmed by the appearance of three doublets of doublets in 1 H nuclear magnetic resonance
Iron and haem complexation studies of 2,3-dihydro-1H-imidazo(1,2-b)pyrazole (IMPY, NSC 51143), a tumour cell ribonucleotide reductase inhibitor.
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Spectrophotometric studies have been undertaken of the interaction of various iron-based systems with the anti-tumour agent, 2,3-dihydro-1H-imidazo(1,2-b)pyrazole (IMPY, NSC (51143), a ribonucleotide reductase inhibitor. No evidence was obtained of direct complexation in aqueous media at 25 degrees
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