- Near-IR mediated intracellular uncaging of NO from cell targeted hollow gold nanoparticles
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We demonstrate modulation of nitric oxide release in solution and in human prostate cancer cells from a thiol functionalized cupferron (TCF) absorbed on hollow gold nanoshells (HGNs) using near-infrared (NIR) light. NO release from the TCF-HGN conjugates
- Levy, Elizabeth S.,Morales, Demosthenes P.,Garcia, John V.,Reich, Norbert O.,Ford, Peter C.
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Read Online
- Precise imaging of mitochondria in cancer cells by real-time monitoring of nitroreductase activity with a targetable and activatable fluorescent probe
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An activatable and mitochondrial-targetable fluorescent probe was developed. This designed probe showed ratiometric fluorescence and light-up near-infrared emission responsiveness to nitroreductase, achieving precise imaging of mitochondria in cancer cells by real-time monitoring of nitroreductase activity.
- Gu, Xianfeng,Tan, Jiahui,Wang, Rongchen,Xu, Ge,Zhao, Chunchang,Zhu, Ning,Zhu, Tianli
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Read Online
- Convenient synthesis of alkyl thioacetate from alkyl halide using a polymer-supported sodium thioacetate
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Alkyl halides are efficiently converted to their corresponding S-alkyl thioacetates under mild and nonaqueous conditions, using polymer-supported sodium thioacetate as a new polymeric reagent at room temperature in high yields and purity. The spent polymeric reagent can be removed quantitatively by filtration and pure products can be obtained by evaporation of the solvent. The spent polymeric reagent can be regenerated and reused several times without its activity changing appreciably. Iranian Chemical Society 2012.
- Zarchi, Mohammad Ali Karimi,Nejabat, Mojgan
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p. 767 - 774
(2013/02/23)
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- Improved syntheses of 5′- S -(2-Aminoethyl)-6- N -(4-nitrobenzyl)- 5′-thioadenosine (SAENTA), analogues, and fluorescent probe conjugates: Analysis of cell-surface human equilibrative nucleoside transporter 1 (hENT1) levels for prediction of the antitumor
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5′-S-(2-Aminoethyl)-6-N-(4-nitrobenzyl)-5′-thioadenosine (SAENTA), 5′-S-(2-acetamidoethyl)-6-N-[(4-substituted)benzyl]-5′- thioadenosine analogues, 5′-S-[2-(6-aminohexanamido)]ethyl-6-N-(4- nitrobenzyl)-5′-thioadenosine (SAHENTA), and related compounds we
- Robins, Morris J.,Peng, Yunshan,Damaraju, Vijaya L.,Mowles, Delores,Barron, Geraldine,Tackaberry, Tracey,Young, James D.,Cass, Carol E.
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supporting information; experimental part
p. 6040 - 6053
(2010/11/02)
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- Probing the mechanism of electron capture and electron transfer dissociation using tags with variable electron affinity
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Electron capture dissociation (ECD) and electron transfer dissociation (ETD) of doubly protonated electron affinity (EA)-tuned peptides were studied to further illuminate the mechanism of these processes. The model peptide FQpSEEQQQTEDELQDK, containing a
- Sohn, Chang Ho,Chung, Cheol K.,Yin, Sheng,Ramachandran, Prasanna,Loo, Joseph A.,Beauchamp, J. L.
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experimental part
p. 5444 - 5459
(2009/09/25)
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- Unsymmetric aryl-alkyl disulfide growth inhibitors of methicillin-resistant Staphylococcus aureus and Bacillus anthracis
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This study describes the antibacterial properties of synthetically produced mixed aryl-alkyl disulfide compounds as a means to control the growth of Staphylococcus aureus and Bacillus anthracis. Some of these compounds exerted strong in vitro bioactivity. Our results indicate that among the 12 different aryl substituents examined, nitrophenyl derivatives provide the strongest antibiotic activities. This may be the result of electronic activation of the arylthio moiety as a leaving group for nucleophilic attack on the disulfide bond. Small alkyl residues on the other sulfur provide the best activity as well, which for different bacteria appears to be somewhat dependent on the nature of the alkyl moiety. The mechanism of action of these lipophilic disulfides is likely similar to that of previously reported N-thiolated β-lactams, which have been shown to produce alkyl-CoA disulfides through a thiol-disulfide exchange within the cytoplasm, ultimately inhibiting type II fatty acid synthesis. However, the mixed alkyl-CoA disulfides themselves show no antibacterial activity, presumably due to the inability of the highly polar compounds to cross the bacterial cell membrane. These structurally simple disulfides have been found to inhibit β-ketoacyl-acyl carrier protein synthase III, or FabH, a key enzyme in type II fatty acid biosynthesis, and thus may serve as new leads to the development of effective antibacterials for MRSA and anthrax infections.
- Turos, Edward,Revell, Kevin D.,Ramaraju, Praveen,Gergeres, Danielle A.,Greenhalgh, Kerriann,Young, Ashley,Sathyanarayan, Nalini,Dickey, Sonja,Lim, Daniel,Alhamadsheh, Mamoun M.,Reynolds, Kevin
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p. 6501 - 6508
(2008/12/21)
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- Improved prodrugs of CC-1065 analogs
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Prodrugs of analogs of the anti-tumor antibiotic CC-1065 having a cleavable protective group containing a sulfonic acid containing phenyl carbamate, in which the protecting group confers enhanced water solubility upon the prodrug, and in which the prodrug
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Page/Page column 15; 28
(2008/06/13)
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- A Convenient Synthesis of Thioacetates and Thiobenzoates Using Silica-Gel Supported Potassium Thioacetate
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A simple and efficient procedure has been developed for the synthesis of thioesters by a reaction of alkyl halides with silica-gel supported potassium thioacetate or thiobenzoate under mild conditions.
- Aoyama, Tadashi,Takido, Toshio,Kodomari, Mitsuo
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p. 3817 - 3824
(2007/10/03)
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- Nanomolar scale nitric oxide generation from self-assembled monolayer modified gold electrodes
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A SAM-modified gold electrode has been developed for the first time for quantitative NO generation of a nanomolar amount that is proportional to the surface area of the electrode.
- Hou,Chen,Amro,Wadu-Mesthrige,Andreana,Liu,Wang
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p. 1831 - 1832
(2007/10/03)
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- Synthesis of S-alkyl esters of protected 2'-deoribonucleoside 3'-phosphorothoates. Building blocks for the large-scale synthesis of phosphorothioate analogues of oligodeoxyribonucleotides by the phosphotriester approach in solution
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Triethylammonium salts of 5'-O-(9-phenylxanthen-9-yl)-2'-deoxyribonucleoside 3'-(H-phosphonates) 23, 33a, 33b and 33c, derived from thymidine, 6-N-pivaloyl-2'-deoxyadenosine, 4-N-benzoyl-2'-deoxycitidine and 2-N-phenylacetyl-2'-deoxyguanosine, react with
- Liu, Xiaohai,Reese, Colin B.
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p. 1685 - 1694
(2007/10/02)
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